TW574380B - Submerged-arc welding point with large heat input, method for producing the welding point, steel solder wire used by the method, and solder flux - Google Patents

Submerged-arc welding point with large heat input, method for producing the welding point, steel solder wire used by the method, and solder flux Download PDF

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TW574380B
TW574380B TW90123390A TW90123390A TW574380B TW 574380 B TW574380 B TW 574380B TW 90123390 A TW90123390 A TW 90123390A TW 90123390 A TW90123390 A TW 90123390A TW 574380 B TW574380 B TW 574380B
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powder
flux
submerged arc
arc welding
mass
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TW90123390A
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Chinese (zh)
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Hiroshi Yano
Naoya Hayakawa
Koichi Yasuda
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Jfe Steel Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3053—Fe as the principal constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/18—Submerged-arc welding

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Arc Welding In General (AREA)
  • Nonmetallic Welding Materials (AREA)

Description

經濟邹1Γ慧时(工消費合作tl印製 574380 A7 B7 五、發明説明（i ) (發明所屬之技術領域） 本發明有關於有高熱量輸入之潛弧熔接（High heat input Submerged Arc Welding)。特別是有關於有輸入熱到 1 5 0 k J /c m以上之有高熱量輸入之潛弧熔接上很合 宜之熔接接頭（Welding Joint)，及該接頭所使用之熔接用 鋼線（焊條鋼線）以及熔接用焊劑（下面簡稱”焊劑”） 〇 在於熔接施工中，從來一向強烈地被要求熔接能率之 提高。而爲了提高熔接效率起見通常是提高熔接輸入熱。 惟通常提高熔接輸入熱時，熔接金屬之韌性會降低。構成 這原因乃由於隨著熔接輸入熱之增加，而熔接部之冷卻速 度會低落，致使熔接金屬之組織之易粗大化之緣故。 潛弧熔接法（Submerged Welding)乃藉在於欲熔接點 溝內所散佈之焊劑內發生之電弧以資實施連續熔接之方法 ,由於以大電流仍能形成安定之電弧，做爲可獲得深入之 熔融及大的熔著量之高效率之熔接法而廣泛的利用於造船 、橋樑、壓力容器、產業機械等之接合厚鋼板之領域上。 惟由於潛弧熔接法係以大電流來實施熔接，因此熔接 輸入熱變高，具有熔接金屬之韌性容易降低之傾向。 對於此問題，例如日本專利公報特開平 7 - 3 2 8 7 9 3號即揭示，在於潛弧熔接時，對於焊劑 中添加硼（B )氧化物，而介著焊劑使熔接金屬含有硼（ B ),以資改善熔接金屬之韌性之技術。特開平 7 - 3 2 8 7 9 3號公報所揭示之技術係將潛弧熔接用之 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閱讀背面之注意事項再填寫本頁)Economic Zou 1 huihui (printed by industrial and consumer cooperation tl 574380 A7 B7 V. Description of the invention (i) (Technical field to which the invention belongs) The present invention relates to high heat input submerged arc welding. In particular, there are suitable welding joints (welding joints) for submerged arc welding with high heat input above 150 kJ / cm, and the steel wire (welding wire) used for this joint. ) And welding flux (hereinafter referred to as "flux") 〇 In welding construction, always has been strongly required to improve the welding energy rate. In order to improve the welding efficiency is usually to increase the welding input heat. However, usually increase the welding input heat The toughness of the welded metal will decrease. The reason for this is that as the input heat of the weld increases, the cooling rate of the welded portion will decrease, which will cause the structure of the welded metal to coarsen. Submerged Welding It is a method of continuous welding by using the arc occurring in the flux dispersed in the groove to be welded. The arc is widely used in the field of joining thick steel plates such as shipbuilding, bridges, pressure vessels, industrial machinery, etc. as an efficient welding method that can obtain deep melting and large welding volume. However, due to submerged arc welding The legal system uses a large current to perform welding, so the welding input heat becomes high, and the toughness of the welded metal tends to decrease. For this problem, for example, Japanese Patent Gazette No. 7-3 2 8 7 9 3 is disclosed, which lies in the potential In arc welding, a technique is added in which boron (B) oxide is added to the flux, and the weld metal contains boron (B) through the flux in order to improve the toughness of the weld metal. JP 7-3 2 8 7 9 3 The disclosed technology applies the paper size of submerged arc welding to the Chinese National Standard (CNS) A4 (210X297 mm) (please read the precautions on the back before filling this page)

-4- 574380 A7 _____ B7 _ 五、發明説明（6 ) B換算而含有〇 · 〇3〜0 . 3 0質量化合物。 再含有（A)群：Mo粉，鉬鐵粉及Mo化合物中之 一種或二種，以Μ 〇換算而共計對於焊劑全量而〇 . 2〜 2.0質量％， （Β)群：Nb粉、鈮鐵粉及Nb化合物 中之一種或二種以上，以N b換算而對於焊劑全量 0·02〜〇.15%之中所選取之一群或二群以上，或 再含有對於焊劑全量而以質量％而8 i〇2 : 1 〇〜2 8% ，CaC〇3: 5 〜15%， Mg〇：15 〜38%， Al2〇3:3 〜20%, Ti〇2:2 〜10%, C a F 2 :2〜1 0 % ,霧化鐵粉，Μ 〇粉，鉬鐵粉，N b粉及鈮 鐵粉以外之金屬粉：2〜8%中所選取之一種或二種以上 爲其特徵之潛弧熔接接頭之製造方法者。 (合宜之實施形態之說明） 本發明人等乃爲了達成上述課題，對於被熔接材之 490〜520MPa級鋼材以熔接輸入熱1 50k J/ cm以上之有高熱量輸入之潛弧熔接而予以接合，處心積 慮硏究了關於所獲得之熔接金屬之韌性之各種要因。該結 果究明了，由熔接輸入熱1 5 0 k J/cm以上之有高熱 量輸入之潛弧熔接所獲得之熔接金屬之韌性乃具有，對於 氮而非常敏感，有由氮量之微小之變化而韌性係顯著之劣 化而韌性之顯著之劣化之情形。 特別是，於被熔接材係T i及Nb含有量少之鋼材時 ，即由微少之氮量之增加而熔接金屬之組織將粗大化，會 (請先閲讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ297公釐） -9 - 574380 A7 __ B7 _ 五、發明説明（7 ) 顯著的劣化，這是可推想爲由於在T i含有量少之鋼材時 ，對於熔接金屬而不能充分地供給T i，固定N量之調整 係很難之緣故。 (請先閲讀背面之注意事項再填寫本頁) 本發明人等依據上述之知見，再加以硏討之結果，想 到了，雖然被熔接材係Ti及Nb含有量少之鋼材時，欲 獲得安定之高韌性之有高熱量輸入之潛弧熔接金屬起見， 需要一方面適宜的調整熔接.用鋼線之N含有量，同時在於 鋼線中適宜量地含有隨應於鋼線中之N含有量之T ‘ i，由 而有在於實施，有高熱量輸入之熔接之下仍可獲得微細之 熔接金屬組織之可能。 再者發明人等對於有高熱量輸入之潛弧熔接金屬爲了 再賦予安定之高韌性而做了硏究檢討。 首先對於熔接金屬中之粒界肥粒鐵生成量與夏氏（衝 擊試驗）吸收能量，韌性値（v E 0 )之關係，而針對 Ti含有量〇·006質量％以下，Nb含有量爲 0 . 0 1 2質量％以下之板厚4 0mm之鋼材在於以熔接 輸入熱1 5 0 k J/cm以下之有高熱量輸入之潛弧接所 熔接之熔接金屬做調查，其調查結果表示於第4圖。 經濟部智慧財產局員工消費合作钍印製 由第4圖獲得之新的知見爲，將熔接金屬中之粒界肥 粒鐵生成量定於1 5面積％以下，最好是1 0面積％以下 ,就可以安定的賦予高韌性。 再對於熔接金屬中之B/N之質量％比與粒界肥粒鐵 生成量之關係也做硏討。其結果表示於第5圖。由第5圖 也明確的顯示，查明了，由於在於鋼線中含有Mo, Nb -10- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 574380 經濟部智慧財產局S工消費合作社印製 A7 ____B7 _五、發明説明（8 ) 等，由而在於熔接金屬中添加了適宜量之Mo， Nb等， 以資適宜的調整B / N之質量％比，達成控制熔接金屬中 之粒界肥粒鐵生成量爲15.0面積％以下，最合宜爲 1 0 · 0面積％以下係可能。 又熔接金屬中之固溶氮量之調整乃，由使用含有T i 或N b之鋼線（熔接鋼線）而可以有某一程度之改善，爲 使用不含有T i或N b之熔接鋼線時即其調整很困難，致 使熔接金屬之韌性之顯著之劣化，特別是使用不含有T i 之熔接鋼線之其熔接金屬之韌性之劣化非常顯著。 一般而言，汎用性高之490〜52OMPa級鋼材 中，Ti含有量爲0.006質量％以下，Nb含有量係 0.012質量％以下之Ti， Nb含有量少之鋼材乃是 其代表。因而欲獲得安定之高韌性之熔接金屬乃往往很困 難。在這種鋼材之熔接時，獲得安定之具有優異之韌性之 熔接金屬之要求係很殷切。 本發明人乃依據上述之知見，想到了再進行硏討之結 果，當被熔接材係Ti及Nb含有量少之鋼材，特別是使 用不含有T i之熔接用鋼線來實施有高熱量輸入潛弧熔接 之下，如對於添加於熔接用焊劑上之鐵粉而使用N含有*4 爲0 . 0030質量以下之霧化鐵粉，而可能獲得，安定 之高韌性之熔接金屬之情形。 又對於有高熱量輸入之潛弧熔接金屬安定的更賦胃更 高之高韌性起見，乃在於焊劑中。含有Mo，Nb等爲合 宜。對於熔接金屬添加適宜量之Mo, Nb等以資適宜地 (請先閲讀背面之注意事項再填寫本頁) 訂 ΡΨ. 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） -11 - 574380 A7 ____B7 五、發明説明（11 ) (請先閱讀背面之注意事項再填寫本頁) %時，由於熔接金屬之組織容易成爲上部變韌性（Bainite )致使韌性劣化，由而分別定爲Μ 〇 : 0 · 1 0〜 0.50%, Nb:0. 10 〜0.200% 之範圍爲合 宜。 再者N i乃提高肥粒鐵相之韌性，提高熔接金屬之韌 性。此效果係於含有0 · 0 5 %以上而呈顯很顯著，另一 方面超過1.00%時即會發生低溫龜裂。因此Ni定爲 〇·05〜1.00%之範圍爲宜。 熔接金屬中之粒界肥粒鐵生成量：1 5 · 0面積％以 卜 〇 對於有高熱量輸入之潛弧熔接金屬上進一步賦予安定 之高韌性起見，不單是做熔接金屬組成之調整，使熔接金 屬中之粒界肥粒鐵生成量抑至1 5 . 0面積％以下才可以 。更進一步使安定的獲得高韌性起見須要將熔接金屬中之 粒界肥粒鐵生產量使之成爲10·0%面積以下。 經濟部智慧財產局員工消費合作社印製 再者熔接金屬中之粒界肥粒鐵生成量係觀察熔接金屬 而做測定，觀察係使用光學顯微鏡，電子顯微鏡等，而觀 察倍率即以1 〇〜5 0 0倍來實施。將觀察面即予以鏡面 硏磨後，以腐蝕液而施予蝕刻，使用畫像解析處理裝置而 對觀察像施予畫像處理，以資求出熔接金屬中之粒界肥鐵 生成量。 熔接金屬中粒界肥粒鐵生成量之測定並不做特別之限 定，通常之測定方法就可以適用。 〇.60^B/N^1.20 •14- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 574380 A7 _____B7 _ 五、發明説明（12 ) (請先閲讀背面之注意事項再填寫本頁) 爲了使熔接金屬中之粒界肥粒鐵之生成量抑至 10·0面積％以下起見，不祗是調整熔接金屬之固溶N 量，同時需要在熔接金屬中適宜量地添加Mo, Nb等， 同時須要調整熔接金屬中之B/N之質量％比。按B係抑 制析出於沃斯田體粒界之粗大之粒界肥粒鐵之生成，以資 提高熔接金屬之韌性之元素。B/N之質量％比未滿 0 . 6 0時即其效果不充分，無法獲得安定之進一步之高 韌性。又B / N質量％比超過1 · 2 0即韌性會劣化，因 此熔接金屬中之B / N質量％比係定爲0 · 6 0以上， 1 . 2 0以下爲合宜。 獲得上述之本發明之熔接金屬之第1方法乃有限定熔 接鋼線（焊條鋼線）之方法。此時之熔接用焊劑不需要特 別限定，只要是通常習知之燒成型焊劑就均可使用。 首先說明限定本發明之有高熱量輸入之潛弧熔接用鋼 線之鋼線組成之理由。（下面之組成中之質量％只有％表 示。) C :0.03 〜0.10% 經濟部智慧財4局員工消費合作社印製 C係增加熔接金屬之強度之元素，本發明乃爲了確保 所欲之熔接金屬強度而在於鋼線中含有0 · 0 3 %以上。 如果鋼線中之C含有量未滿0 · 0 3 %時，很難獲得規定 之熔接金屬強度，並且熔接時之電弧環境中之CO分壓變 低，從大氣中捲入N而有使熔接金屬之N含有量增加之虞 。另一方面超過0 · 10%地含有時，熔接金屬中之C含 有量增加，熔接金屬之韌性會劣化，同時容易發生高溫龜 -15- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 574380 A7 __B7_ 五、發明説明（16 ) 上述之成份以外之剩餘部係F e及不可避免之不純物 。做爲不可避免之不純物即可以容許Ο : 〇 · 0050% (請先閱讀背面之注意事項再填寫本頁) 以下，Ρ:0·020%以下，S:〇.〇l〇%以下也 〇 又，本發明之鋼線乃，從提高送給性（進給性），防 銹性之觀點，在於鋼線表面實施銅電鍍爲宜。又本發明之 鋼線乃適用於未滿1 5 0 k J/cm之輸入熱之低熱量輸 入之潛弧熔接也沒有任何問題。當然安定的可以獲得具有 優異之韌性之熔接金屬也。 再者，欲使用上述本發明之熔接鋼線時所使用之熔接 焊劑係不必要特別的限定，通常習知之燒成型焊劑就任一 者均可以使用，惟最好是使用含有0 . 1〜1 . 0質量％ 之硼氧化物之燒成型焊劑。由而對於熔接金屬供給B，抑 制組織之粗大化，防止韌性之劣化。 經濟部智慧財產局員工消費合作社印製 又，硼氧化物以外之焊劑成份係不做特別之限定，惟 以質量％而3 i : 15〜28%, Mg〇：15〜38% ，鐵粉：15 〜35%, CaC〇3: 5 〜15%, Αΐ2〇3··5 〜20%， Ti〇2:2 〜10%, C a F 2 :2〜10%,又鐵粉以外之金屬粉係超過8質量％之下 仍然可以獲得優異之韌性之熔接金屬，惟使熔接材料成本 增加，熔接接頭之製作費成爲昂貴，因此鐵粉以外之金屬 粉係含有8 %以下爲宜。 再者本發明中焊劑並不侷限於上述，規定於J I S Z 3 3 5 2之焊劑中，只要是作業性良好之焊劑即不含 -19 - 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 574380 A7 B7 五、發明説明（17) 鐵粉亦當然可用。 (請先閱讀背面之注意事項再填寫本頁) 又在於焊劑中添加鐵粉時，即使用N : 〇 . 〇 〇 3 0 質量％以下之鐵粉爲宜。N:〇.0030質量％以下之 鐵粉係對於焊劑全量地含有2 0〜4 5質量％爲宜。 鐵粉中之N含有量超過0 . 0 〇 3 0質量％時所獲得 之熔接金屬之N含有量增加而顯示很難安定地確保高韌性 之趨向。又鐵粉中之N含有量以0·0025質量％以下 更合宜。 焊劑中之鐵粉乃在於熔接時移行於熔融池以資增加熔 著速度，對於熔接效率之·提高及減低熔接輸入熱有所貢獻 〇 焊劑中之N : 0 . 0030質量％以下之鐵粉之含有 量係未滿2 0質量％時，上述之效果少，另一方面超過 4 5質量％之含有時，顯示電弧成爲不安定及焊道外觀劣 化之趨向。由此理由N:0.0030質量％以下之鐵粉 之含量乃對於焊劑全量而2 0〜4 5質量％爲合宜。 又，做爲欲獲得上述之本發明之熔接金屬之第2方法 而有限定熔接焊劑之組成之方法。 經濟部智慧財4局3工消費合作社印製 此時之熔接用鋼線不必要特別的做限定。通常習知之 潛弧熔接用鋼線，就均可以使用。 本發明之潛弧熔接用焊劑係燒成型焊劑，於輸入熱 1 5 Ok J/cm以上之有高熱量輸入潛弧熔接上很合宜 〇 首先對於本發明之潛弧熔接用焊劑之組成限定理由做 -20- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 574380 經濟部智慧財產局員工消費合作社印製 A7 B7五、發明説明（19 ) 使用於焊劑原料，由而具有可以減少焊劑造粒時之結合劑 量之利點。 霧化鐵粉乃將鐵水予以噴霧（霧化）使之粉化之，通 常藉由脫水-乾燥-解碎-分級-精加工之還原-解碎-分級之製程而被做成製品。 通常之霧化鐵粉之N含有量係0 · 〇 〇 5 0 %程度。 而欲製成爲0 · 0 0 3 0 %以下之低N霧化鐵粉係當然須 要減低鐵水之N量，惟適宜的調整精加工還原製程之還原 溫度，冷卻溫度也是必要者。 B化合物：以B換算而0 . 0 3〜0 · 3 0 % B係在於熔接時移行於熔接金屬中，在於熔接金屬中 抑制生成於沃斯田體粒界之粗 < 之肥粒鐵之生成以資提高 熔接金屬之韌性之效果。B係低廉地可以達成此種效果。 此種效果乃以B換算而使B化合物對於焊劑全量地含有 0 · 0 3 %以上就能顯著。另一方面。以B換算而對於焊 劑全量地超過0 . 3 0%地含有B化合物時，熔接金屬之 韌性有劣化之趨向。 (A )群：Μ 〇粉，鉬鐵粉及Μ 〇化合物粉中之一種 或二種以上··以Mo換算而共計0 · 2〜2 · 0質量％ (B)群：Nb粉，鈮鐵粉及Nb化合物粉中之一種 或二種以上：以Nb換算共計0·02〜0·15%中之 一群或一群。 (Α)群乃令Mo， （B)群乃令Nb，含於焊接金 屬之用之供給源，Mo，Nb均在於熔接時移行於熔接金 (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） · 22 574380 A7 B7 五、發明説明（2G ) (請先閲讀背面之注意事項再填寫本頁) 屬中，而具有在於焊接金屬中抑制生成於沃斯田體粒界之 粗大肥粒鐵之生成，而提高熔接金屬之韌性之效果。上述 之效果乃視其必要而從（A )群，（B )群所選取之一群 或二群使之含有就可以達成。 上述之效果乃自（A)群之Mo粉，鉬鐵粉及Mo化 合物粉中選取一種或二種以上，以Mo換算共計〇 _ 2% 以上，（B )群之N b粉，鈮鐵粉及N b化合物粉中之一 種或二種以上以Nb換算而共計含有〇.02%以上就可 以成爲有顯著之效果。 另一方面（A )群之Μ 〇粉，鉬鐵粉及Μ 〇化合物粉 中之一種或二種以上，以Mo換算而共計超過2.0%， (B)群之Nb粉，鈮鐵粉及Nb化合物粉中之一種或二 種以上，以N b換算而共計超過〇 . ；[ 5 %，地分別超値 地含有時，熔接金屬之組織係容易成爲上部變韌性，而熔 接金屬之韌性有劣化之趨勢。 除了上述之成份再由S i 〇2 : 1 〇〜28%, 經濟部智慧財產局員工消費合作社印^574 380380 A7 _____ B7 _ 5. Description of the invention (6) B conversion contains 0 · 〇3 ~ 0.30 mass compound. (A) group: one or two of Mo powder, molybdenum iron powder, and Mo compound, totaling 0.2 to 2.0% by mass for the total amount of flux in terms of Μo, (B) group: Nb powder, niobium One or two or more of iron powder and Nb compound, based on Nb conversion, for one or two or more groups selected from the total flux of 0.02 to 0.15%, or further containing mass percent for the total amount of flux Whereas 8 i〇2: 1〇 ~ 2 8%, CaC〇3: 5 ~ 15%, Mg〇: 15 ~ 38%, Al2O3: 3 ~ 20%, Ti〇2: 2 ~ 10%, C a F 2: 2 ~ 10%, atomized iron powder, MO powder, molybdenum iron powder, Nb powder and metal powder other than ferroniobium powder: one or two or more selected from 2 to 8% are characteristic Submerged arc welding joint manufacturing method. (Explanation of a suitable embodiment) In order to achieve the above-mentioned problem, the present inventors joined submerged arc welding of 490 to 520 MPa grade steel materials to be welded by submerged arc welding with a high heat input of 150 kJ / cm or more. Careful consideration of various factors related to the toughness of the weld metal obtained. The results show that the toughness of the weld metal obtained by submerged arc welding with a high heat input of more than 150 k J / cm, is very sensitive to nitrogen, and there is a small change in the amount of nitrogen. The toughness is a case where the toughness is significantly deteriorated. In particular, when the material to be welded is a steel with a small Ti and Nb content, the microstructure of the welded metal will be coarsened by the increase of a small amount of nitrogen. (Please read the precautions on the back before filling this page) The paper size printed by the Intellectual Property Bureau's Consumer Cooperatives of the Ministry of Economic Affairs applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm) -9-574380 A7 __ B7 _ V. Description of the invention (7) Significant degradation It is presumed that when a steel material with a small T i content is insufficient for supplying T i to the weld metal, it is difficult to adjust the fixed N amount. (Please read the precautions on the back before filling this page) The inventors and others based on the above-mentioned knowledge and discussed the results, and thought that although the welded material is a steel with a small content of Ti and Nb, they want to obtain stability For high-toughness submerged arc welding of metals with high heat input, it is necessary to appropriately adjust the welding on the one hand. The N content of the steel wire is also contained in the steel wire in an appropriate amount corresponding to the N content of the steel wire. The amount of T'i is therefore implemented, and a fine welded metal structure can still be obtained under welding with high heat input. Furthermore, the inventors and others have conducted in-depth reviews on submerged arc welding metals with high heat input in order to regain stability and high toughness. First, the relationship between the amount of iron in the grain boundary of the weld metal and the energy absorbed by the Charpy (impact test) and the toughness 冲击 (v E 0). For the Ti content of 0.0006% by mass or less, the Nb content is 0. The steel with a thickness of 40mm or less with a mass of less than 0.12% is based on the welding metal welded by a submerged arc joint with a high heat input below 150 kJ / cm, and the results of the investigation are shown in section 4 Figure. Consumption cooperation with employees of the Intellectual Property Bureau of the Ministry of Economic Affairs printed the new insight obtained from Figure 4 to set the amount of grain boundary fertilizer and iron in the welded metal to 15% by area or less, preferably 10% by area or less It can stably impart high toughness. The relationship between the mass% ratio of B / N in the weld metal and the amount of iron produced at the grain boundary is also discussed. The results are shown in FIG. 5. Figure 5 also clearly shows that it is ascertained that because the steel wire contains Mo, Nb -10- This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 574380 Workers of the Intellectual Property Bureau of the Ministry of Economic Affairs Consumption cooperative prints A7 ____B7 _V. Invention description (8), etc. The reason is that an appropriate amount of Mo, Nb, etc. is added to the welding metal, and the mass% ratio of B / N is adjusted to achieve the control of the welding metal. It is possible that the amount of iron produced at the grain boundary is 15.0 area% or less, and the most suitable value is 10 · 0 area% or less. The adjustment of the amount of solid-solved nitrogen in the welded metal can be improved to a certain extent by using a steel wire (fused steel wire) containing T i or N b, in order to use a welded steel that does not contain T i or N b It is very difficult to adjust the wire, which results in significant deterioration of the toughness of the weld metal, especially the deterioration of the toughness of the weld metal using a welded steel wire without T i. Generally speaking, among the 490 ~ 52OMPa grade steels with high versatility, the Ti content is 0.006 mass% or less, and the Nb content is 0.012 mass% or less. Ti is a representative steel with a small Nb content. Therefore, it is often difficult to obtain a stable and high-toughness weld metal. In the welding of such steels, the requirements for obtaining a stable weld metal with excellent toughness are very demanding. Based on the above knowledge, the inventor thought of the result of further discussion. When the material to be welded is a steel with a small content of Ti and Nb, especially a steel wire for welding without T i is used to implement high heat input. Under submerged arc welding, if iron powder added to the welding flux is used and N atomized iron powder with a mass of 4 or less is less than 0.030 mass, it is possible to obtain a stable and high-toughness welding metal. And for the submerged arc welding metal with high heat input, the stability and the higher toughness of the stomach lies in the flux. It is suitable to contain Mo, Nb, and the like. Add appropriate amounts of Mo, Nb, etc. to the weld metal (please read the precautions on the back before filling this page). Order the paper. This paper size applies the Chinese National Standard (CNS) Α4 size (210X297 mm) -11 -574380 A7 ____B7 V. Description of the invention (11) (Please read the precautions on the back before filling out this page) %%, because the structure of the welded metal easily becomes the upper toughness (Bainite), which causes the toughness to deteriorate, so they are designated as M 〇: 0 · 1 0 to 0.50%, Nb: 0.1 to 0.200% is suitable. Furthermore, N i increases the toughness of the ferrous phase and the toughness of the weld metal. This effect is significant when it contains more than 0.5%. On the other hand, when it exceeds 1.00%, low-temperature cracking occurs. Therefore, Ni is preferably set to a range of 0.05 to 1.00%. The amount of grain boundary ferrous iron in the weld metal: 15 · 0 area%. In order to further impart stability and high toughness to the submerged arc weld metal with high heat input, it is not just to adjust the composition of the weld metal. It is only necessary to reduce the amount of iron in the grain boundaries of the welded metal to less than 15.0 area%. In order to achieve stable and high toughness, it is necessary to make the grain boundary fertilizer and iron content in the welded metal less than 10.0% of the area. Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, and the amount of grain boundary fertilizer and iron in the weld metal is measured by observing the weld metal. The observation system uses an optical microscope and an electron microscope. 0 0 times to implement. After observing the mirror surface by honing, it is etched with an etching solution, and the observation image is subjected to image processing using an image analysis processing device to obtain the amount of grain boundary ferrous iron in the welded metal. The measurement of the amount of iron produced at the grain boundary in the welded metal is not particularly limited, and the usual measurement methods can be applied. 〇.60 ^ B / N ^ 1.20 • 14- This paper size is applicable to Chinese National Standard (CNS) A4 (210X297 mm) 574380 A7 _____B7 _ V. Description of the invention (12) (Please read the notes on the back before filling in (This page) In order to reduce the amount of grain boundary fertilizer and iron in the weld metal to less than 10 · 0 area%, it is necessary to adjust the amount of solid solution N of the weld metal, and it is necessary to add an appropriate amount in the weld metal. Mo, Nb, etc. At the same time, it is necessary to adjust the mass% ratio of B / N in the weld metal. According to the B system, the analysis of the formation of coarse grain boundary ferrous iron from the grain boundary of Vostian is restricted to increase the toughness of the welded metal. When the mass% ratio of B / N is less than 0.6, the effect is insufficient, and stable and further high toughness cannot be obtained. Since the B / N mass% ratio exceeds 1.20, the toughness is deteriorated. Therefore, the B / N mass% ratio in the weld metal is set to be equal to or higher than 0.60, and preferably equal to or lower than 1.2. The first method for obtaining the above-mentioned welded metal of the present invention is a method of limiting a welded steel wire (steel wire). The flux for welding at this time does not need to be particularly limited, and any conventionally known firing flux can be used. First, the reason for limiting the steel wire composition of the steel wire for submerged arc welding with high heat input according to the present invention will be explained. (The mass percentage in the following composition is only expressed as%.) C: 0.03 to 0.10% Printed by the Consumer Cooperatives of the 4th Bureau of the Ministry of Economic Affairs and the Consumer Cooperative, C is an element that increases the strength of the weld metal. The present invention is to ensure the desired weld metal The strength lies in that the steel wire contains 0.30% or more. If the C content in the steel wire is less than 0.3%, it is difficult to obtain the specified strength of the weld metal, and the partial pressure of CO in the arc environment during welding becomes low, and N is drawn from the atmosphere to make the weld. The N content of the metal may increase. On the other hand, if the content exceeds 0 · 10%, the content of C in the weld metal increases, the toughness of the weld metal will deteriorate, and high temperature turtles are prone to occur. -15- This paper applies the Chinese National Standard (CNS) A4 specification (210X297) (Mm) 574380 A7 __B7_ V. Description of the invention (16) The remainder other than the above components are Fe and unavoidable impurities. As an unavoidable impurity, 〇: 〇 0050% (please read the precautions on the back before filling in this page) The following, P: 0 · 020% or less, S: 〇〇〇〇〇% or less In the steel wire of the present invention, from the viewpoint of improving feedability (feedability) and rust resistance, it is preferable to perform copper plating on the surface of the steel wire. In addition, the steel wire of the present invention is suitable for submerged arc welding of low heat input with input heat below 150 k J / cm without any problem. Of course, a weld metal having excellent toughness can be obtained stably. Furthermore, the welding flux used when the above-mentioned welded steel wire of the present invention is to be used is not particularly limited. Generally, any one of conventionally known welding fluxes can be used, but it is preferable to use a solder containing 0.1 to 1 0 mass% sintered flux of boron oxide. Therefore, the supply of B to the weld metal suppresses coarsening of the structure and prevents deterioration of toughness. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. The composition of fluxes other than boron oxide is not particularly limited, but 3%: 15 ~ 28%, Mg0: 15 ~ 38%, iron powder: 15 ～ 35%, CaC〇3: 5 ～ 15%, Αΐ2〇3 ·· 5 ～ 20%, Ti〇2: 2 ～ 10%, C a F 2: 2 ～ 10%, and metal powder other than iron powder Welding metals with excellent toughness can still be obtained at more than 8% by mass, but the cost of welding materials increases and the production cost of welding joints becomes expensive. Therefore, metal powders other than iron powder should contain 8% or less. Furthermore, the flux in the present invention is not limited to the above, and is specified in JISZ 3 3 5 2 flux, as long as it is a flux with good workability--19-This paper size applies Chinese National Standard (CNS) A4 specifications ( 210X297 mm) 574380 A7 B7 V. Description of the invention (17) Of course, iron powder is also available. (Please read the precautions on the back before filling this page.) When adding iron powder to the flux, it is better to use iron powder with N: 〇. 〇 〇 30% by mass. The N: 0.0030 mass% or less of the iron powder is preferably contained in the flux in an amount of 20 to 45 mass%. When the N content in the iron powder exceeds 0.030% by mass, the N content of the weld metal obtained increases, which shows that it is difficult to securely secure high toughness. The N content in the iron powder is more preferably from 0.0025 mass% or less. The iron powder in the flux is moved to the melting pool during welding to increase the welding speed. It contributes to the improvement of welding efficiency and the reduction of welding input heat. N in the flux: 0. 0030 mass% or less of iron powder When the content is less than 20% by mass, the above-mentioned effects are small. On the other hand, when the content is more than 45% by mass, the arc tends to become unstable and the appearance of the bead deteriorates. For this reason, the content of iron powder N: 0.0030 mass% or less is suitable for the entire flux and 20 to 45 mass%. In addition, there is a method for limiting the composition of the welding flux as the second method for obtaining the above-mentioned welding metal of the present invention. Printed by the Ministry of Economic Affairs, the 4th Bureau of Wisdom Wealth Cooperatives, and the steel wire for welding at this time does not need to be specially limited. Generally known steel wires for submerged arc welding can be used. The flux for submerged arc welding of the present invention is a firing flux, which is suitable for submerged arc welding with a high heat input above 15 Ok J / cm. First, the reasons for the composition of the submerged arc welding flux of the present invention are limited. Do-20- This paper size applies Chinese National Standard (CNS) A4 specification (210X297mm) 574380 Printed by A7 B7, Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of invention (19) It is used for flux raw materials, so The advantage of reducing the combined dosage of flux granulation. The atomized iron powder is powdered by spraying (atomizing) the molten iron, and is usually made into a product by a process of dehydration-drying-disintegration-classification-refined reduction-disintegration-classification. The N content of a normal atomized iron powder is about 0. 5%. Of course, to make low-N atomized iron powder below 0. 0 30%, it is necessary to reduce the amount of N in the molten iron. However, it is necessary to adjust the reduction temperature and cooling temperature of the finishing reduction process appropriately. Compound B: 0.03 ~ 0 · 30% in terms of B. B refers to the fact that it travels in the weld metal during welding, and suppresses the formation of coarse < The effect is to increase the toughness of the weld metal. B series can achieve this effect cheaply. This effect is remarkable when the B compound is contained in a total amount of 0.30% or more of the flux in terms of B. on the other hand. When the B compound is contained in a total amount of 0.30% or more of the flux in terms of B, the toughness of the weld metal tends to deteriorate. (A) group: one or two or more of 〇 powder, molybdenum iron powder, and 〇 compound powder ·· Mo totals 0 · 2 ~ 2 · 0% by mass (B) group: Nb powder, iron niobium One or two or more of the powder and Nb compound powder: one or a group of a total of 0.02 to 0.15% in Nb conversion. (A) group is order Mo, (B) group is order Nb, which is included in the supply source for welding metal. Mo and Nb are transferred to the welding gold during welding (please read the precautions on the back before filling this page) This paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) · 22 574380 A7 B7 V. Description of the invention (2G) (Please read the precautions on the back before filling this page). The effect of inhibiting the formation of coarse fat iron produced in Vostian body and grain boundary, and improving the toughness of welded metal. The above-mentioned effect can be achieved by selecting one or two groups from the (A) group and the (B) group as necessary. The above-mentioned effect is to select one or more of Mo powder, molybdenum iron powder, and Mo compound powder from the group (A), and the total amount of Mo conversion is more than 0%, and the N b powder of the (B) group and ferroniobium powder. One or two or more of the N b compound powders, which have a total content of 0.02% or more in terms of Nb conversion, can have a significant effect. On the other hand, one or two or more of the Mo powder, molybdenum iron powder, and Mo compound powder of the (A) group, totaling more than 2.0% in terms of Mo, and the Nb powder, ferroniobium powder, and Nb of the (B) group One or two or more of the compound powders, totaling more than 0.0 in terms of N b; [5%, when contained separately in excess, the structure of the weld metal tends to become tougher at the top, and the toughness of the weld metal is deteriorated. The trend. In addition to the above ingredients, S i 〇2: 10 ~ 28%, printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs ^

CaC〇3: 5 〜15%， Mg〇：15 〜38%, Al2〇3:3 〜20%, Ti〇2:2 〜10%, C a F 2 :2〜1 0 %，霧化鐵粉，Μ 〇粉，鉬鐵粉，N b粉及銀 鐵粉以外之金屬粉：2〜8%之中所選取之一種或二種以 上。 本發明之熔接用焊劑乃含有在上述之鐵粉（霧化鐵粉 )，B化合物粉，及Mo粉，鉬鐵粉，Mo化合物粉之一 種或二種以上，Nb粉，鈮鐵粉，Nb化合物粉之一種或 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -23- 574380 經濟部智慧財產局員工消費合作Ti印製 A7 B7五、發明説明（21 ) 二種以上，再加上Si〇2，CaC〇3, Mg〇， A 1 2 Ο 3 , T i Ο 2 , CaF2，及霧化鐵粉，Μο粉，鉬 鐵粉，N b粉，鈮鐵粉以外之金屬粉中所選取之一種或二 種以上爲合宜。 S i〇2乃做爲造渣劑係有效之成份。爲了調整熔渣之 粘性起見含有它乃爲合宜。 S i〇2之含有量未滿1 0 %時，所生成之熔渣之融點 有上昇之趨向，另一方面超過2 8 %地含有時融點變過低 而容易發生焊道外觀之紊亂，又熔接金屬之氧氣量增加， 而熔接金屬之韌性有劣化之傾向。因此S i 0 2以1 〇〜 2 8 %爲合宜。 CaC〇3係在於熔接中分解成爲CaO及C〇2,由 此C〇2氣體而從外氣而遮蔽熔接金屬，同時，使熔接環境 中之氫分壓降低，而有效地作用於防止氫之侵入於熔接金 屬中。又C a 0係鹼性成份，使熔渣上昇，且有提高熔接 金屬之韌性之效果。 C a C〇3之含有量未滿5%時，看不出由上述之 C〇2氣體所致之遮蔽效果。有耐氫龜裂性低落之趨勢。另 一方面超過15%地含有時，CO2氣體之發生量增加，熔 接作業性，焊道外觀會變劣，因此C a C 0 3以定爲5〜 1 5%之範圍爲合宜。 M g 0係具有防止焊劑之過度流動之作用。且有在於 有高熱量輸入之熔接時之焊道形狀安定化之效果。又 Mg 0係使熔渣之鹼度增加減低熔接金屬中之氧含有量， (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)八4規格（210X297公釐） -24- 574380 經濟部智慧財產局g(工消費合作ti印製 A7 __ B7五、發明説明（22 ) 以資提高熔接金屬之韌性上有用之成份。Mg 0之含有量 在未滿1 5%時看不出有上述之效果。另一方面超過3 8 %地含有時，融點過於上昇，焊道外觀有劣化之趨勢。因 此Mg ◦定爲1 5〜3 8%之範圍爲合宜。 A 1 2〇3係不降低粘性地可以使熔渣之融點上昇，因 此在調整熔渣之融點上有效之成份。A 1 2〇3之含有量未 滿3%時，顯不出上述效果，另一方面超過20%地含有 時，熔渣之融點過於上昇招致焊道寬度之不均勻或外觀之 劣化。因此A 1 2〇3之含有量乃以3〜2 0%之範圍爲合 宜。 T i〇2係可以提高熔渣之流動性，以資改善熔渣之剝 離性，同時在於電弧空洞內而部份地被還原而以T i地移 行於熔接金屬中，有效的作用於熔接金屬之韌性之改善。 惟Ti之含有量未滿2%時，顯不出上述之效果，另一方 面超過1 0 %地含有時，顯示焊道外觀之劣化之趨勢。因 此T i〇2乃定爲2〜1 0%之範圍爲宜。 C a F 2係不致於上昇融點地可以增加熔渣之鹼度，對 於熔接金屬之氧氣量之調整上有效。C a F2之含有量未滿 2%時其效果時，另一方面超過1 0%時，熔渣之粘性係 過於降低，焊道外觀會惡化。因此C a F .2係定爲2〜1 0 %之範圍爲宜。 霧化鐵粉，Μ 〇粉，鉬鐵粉，N b粉及鈮鐵粉以外之 金屬粉乃做爲脫氧劑或合金元素源地予以添加，惟其含有 量未滿2 %時將很難確保熔接金屬之韌性，同時焊道外觀 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 25- 574380 經濟部智慧財產局g(工消費合作社印製 A7 ___B7五、發明説明（23 ) 有惡化之傾向，另一方面超過8%地含有時，熔接金屬之 氧量變低，熔接金屬之組織將成爲變韌性或麻田散體主體 之組織因此熔接金屬之韌性有降低之趨勢，因此霧化鐵粉 ，Μ 〇粉，鉬鐵粉，N b粉及鈮鐵粉以外之金屬粉即定爲 2〜8 %之範圍爲合宜。此種金屬粉而有錳鐵粉，矽鐵粉 ，鈦鐵粉，錳，鈦等，又金屬粉係除了粉末以外之形態而 做成箔狀，針狀亦可以。 本發明之焊劑乃將上述之焊劑原料以上述之範圍之規 定量地予以配合，與結合劑一齊混練，造粒之後予以燒成 。關於造粒方法雖不特別限定，惟使用轉動式造粒機，擠 壓式造粒機等即很合宜。造粒後實施去除塵埃，粗大粒之 解碎等之整粒處理，做成平均粒徑〇.075〜5mm範 圍之粒子爲合宜。 又做爲結合劑即以聚乙烯醇等之水溶液，矽酸鈉水溶 液，矽酸鉀水溶液，及矽酸鈉水溶液與矽酸鉀水溶液之混 合液等爲合宜。結合劑添加量係焊劑原料之共計量每1公 斤5 0〜3 0 Occ程度爲宜。 又，本發明之熔接用焊劑係當然適用於輸入熱量未滿 1 5 0k J/cm之低熱量輸入之潛弧熔接時沒有問題。 可以獲得安定地具有優異之韌性之熔接金屬者。 又，使用上述本發明之熔接用焊劑時之熔接用鋼線乃 不需要特別限定，只要是通常習知之潛弧熔接用鋼線均可 使用。 接著說明具有優異之熔接金屬部韌性之有高熱量輸入 (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -26- 574380 A7 _____B7 _ 五、發明説明？4 ) 之潛弧熔接之接頭之製造方法。 (請先聞讀背面之注意事項再填寫本頁) 本發明之有高熱量輸入之潛弧熔接接頭之製造方法乃 :做爲被熔接材而使用T i , N b含有量少之鋼材，而藉 由輸入熱1 5 0 k J/cm以上之有高熱量輸入之潛弧熔 接來實施熔接接合時欲獲高韌性之熔接金屬時特別有效。 做爲被熔接材而使用之鋼材係，T i含有量 0 . 006質量％以下，Nb含有量0 . 012質量％以 下，最好是具有N含有量〇.〇〇55%以下之母材組成 之鋼材。其他成份即含有C ·· 〇 . 07〜18%，Si: 0.40%以下，Μη: 1.00 〜1.60%, P: 0.020%以下，S:〇.l〇%，或再含有Α1: 0 · 0 5 0%以下爲宜，除了上述成份之外含有V亦可以 ，又本發明所稱之鋼材係包含：厚鋼板，形鋼，鋼管，棒 管也。 對於上述鋼材實施規定形狀之焊溝加工（開先加工） 之後，在於該焊溝內散佈焊劑，使用上述有高熱量輸入之 潛弧熔接用鋼線，藉由輸入熱1 5 0 k J/cm以上之有 高熱量輸入之潛弧熔接而實施熔接接合。 經濟部智慧財4局員工消費合作社印製 本發明之潛弧熔接乃包含多電極之潛弧熔接之通常習 知之熔接法均能適用，不需要特別限定，又熔接條件亦不 需要特別地限定。 以上述之被熔接材，熔接材料之組合，而藉由輸入熱 爲1 5 0 k J/cm以上之有高熱量輸入之潛弧熔接法所 熔接接合製作成熔接接頭（熔接構造物）。而所獲得之熔 -27- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 574380 A7 B7 五、發明説明？5 ) 接接頭（熔接構造物）之熔接金屬將成爲高韌性之熔接金 屬者。 (請先閱讀背面之注意事項再填寫本頁) (實施例1 ) 於表1所示之母材組成之4 9 0 Μ P a級鋼板（板厚 :25mm、40mm)上，施予第1A圖第1B圖所示 形狀之焊溝加工，而以一通道之潛弧熔接而製作熔接接頭 。鋼板2 5 m m厚時之焊溝形狀係採L型焊溝，焊溝角度 4 0 °，熔接根面（Root Face )即定爲2 m m。又鋼板 4 0 m m厚之焊溝形狀即採Y型焊溝，焊溝角度3 5 ° ， 熔接根面即定爲3 m m。 潛弧熔接係使用二電極之潛弧熔接機來實施。以表2 所示之熔接條件，使用表3所示之熔接用鋼線（焊條）來 實施。又所使用之焊劑係採表4所示之組成之含有氧化硼 0 . 4質量％之市販之有加鐵粉燒成型焊劑，含於焊劑中 之鐵粉係使用以海綿鐵粉爲原料之鐵粉，熔接輸入熱量係 板厚2 5mm時爲1 5 3 k J/cm板厚4 0mm時即 270kJ/cm〇 經濟部智慧財1局員工消費合作社印製 對於上述地獲得之熔接接頭，從熔接長度方向之中央 部之第2 A圖，第2 B圖所示之位置而採取試驗片。調查 了熔接金屬之抗拉強度，韌性•抗拉試驗係依據 JIS Z 3111之規定，又衝擊試驗係依據 JIs Z 3112之規定而實施，以求抗拉強度TS ，及0°C, — 20°c之夏氏吸收能量値vE〇、VE-20。 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -28- 574380 經濟部智慧財產局員工消費合作社印製 A7 _____B7五、發明説明？6 ) 這些結果彙集於表5。 本發明例均爲，熔接金屬之v E 〇係2 7 J以上，獲得 了母材規格之一般水平之同等之具有優異之韌性以上之熔 接接頭。 又使用本發明之範圍內之含有Mo， Nb之鋼線所獲 得之熔接接頭（熔接接頭N 〇 , 3、N 〇 . 4、N 〇 . 5 )係熔接金屬係v E - 2 〇爲超過2 7 J之優異之韌性。 另一方面，鋼線之N含有量之非常脫離本發明之範圍 之比較例（熔接接頭N 〇 . 6 )即熔接接頭之v E 〇未滿 2 7 J ,韌性劣化。 又，鋼線之T i含有量脫離本發明之比較例（熔接接 頭N 〇 · 7 )即組織粗大化，熔接金屬之v E 〇未滿2 7 J ，顯示韌性劣化。 又，鋼線之T i / N低脫離本發明之範圍之比較例（ 熔接接頭No.6, No·7， No.8)乃熔接金屬之 v E 〇未滿2 7 J呈韌性劣化。 又鋼線之T i含有量高脫離本發明之範圍之比較例（ 熔接接頭N 〇 . 9 )乃組織成爲上部變韌性主體之組織， 熔接金屬之v E 〇未滿2 7 J ,韌性劣化。） 再者，鋼線之Μ η含有量低脫離本發明之範圍之比較 例（熔接接頭No · 1 0)以及鋼線之S i含有量高的脫 離本發明之範圍之比較例（熔接接頭N 〇 . 1 1 )係熔接 金屬之肥粒鐵呈顯粗大化，v E 〇未滿2 7 J，呈顯熔接金 屬之韌性之劣化。 (請先閱讀背面之注意事項再填寫本頁) 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -29- 574380 A7 B7 五、發明説明？7 ) 表6係表示熔接金屬之組成，熔接金屬中之B/N之 質量％比與粒界肥粒鐵生成量。本發明例乃任一者之熔接 金屬中之粒界肥粒鐵生成量呈顯1 5面積％以下，獲得熔 (請先閲讀背面之注意事項再填寫本頁) 接金屬之v EQ爲2 7 J以上之具有優異之韌性之熔接接頭 〇 再者，使用含有本發明範圍內之Μ 〇，N b之鋼線， 且熔接金屬中之B/N質量％比之能成爲本發明之範圍內 之熔接接頭（熔接接頭No. 3，No. 4，No. 5) 乃，熔接金屬中之粒界肥粒鐵生成量成爲1 0面積％以下 ，具有熔接金屬之v E - 2 〇係超過了 2 7 J之優異之韌性 者。 (實施例2 ) 對於表7所示之母材組成之4 9 0 Μ P a級鋼板（板 厚t : 40mm)、建築構造用TMCP鋼板（板厚t : 60mm)施予如第3圖所示之焊溝加工，藉由一通道之 潛弧熔接來實施熔接接頭。焊溝形狀即採Y型焊溝。焊溝 角度35° ,熔接根面d (mm)係，板厚t : 40mm 經濟部智慧財4局員工消費合作社印製 時採2mm，板厚t : 6 〇mm時即採用3mm。 潛弧熔接係使用二電極之潛弧熔接機.，以表8所示之 熔接條件，使用表9所示之鋼線組成之熔接用鋼線來實施 。又焊劑係將原料配合成爲如表1 0之組成，以矽酸鈉水 溶液一齊予以混練•造粒之後，以5 0 0 °C X 1 5 m i η 之條件而燒成，使用粒子徑3 m m以下之含有氧化硼及鐵 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） -30- 574380 A7 __ B7 五、發明説明？8 ) 粉之焊劑。又添加於焊劑中之鐵粉係使用表1 1所示之氮 含有量之鐵粉。熔接輸入熱係板厚40mm時，269 kJ/cm，板厚 60mm時即 549kJ/cm。 (請先閱讀背面之注意事項再填寫本頁) 對於如上述地獲之熔接接頭，與實施例1同樣地從熔 接長度方向之中央部之第2A圖，第2B圖所示之位置而 採取試驗片，調查了熔接金屬之抗拉強度及訪性。 又，與實施例1一樣抗拉試驗係依據 J I S Z 3 1 1 1之規定，又，衝擊試驗係依據 JIs Z 3112之規定而實施，求出抗拉強度TS 及0 °C — 2 0 °C之夏氏吸收能量値v E ◦、V E - 2 〇。 其結果彙集於表1 2。 使用本發明例之鋼線及焊劑之熔接接頭乃，熔接金屬 之v E 〇係分別滿足板厚4 0 m m時1 〇 〇 J以上，板厚 6 0 m m時爲4 7以上，又熔接金屬之v E - 2 〇係分別滿 足，板厚4〇mm之80J以上，板厚60mm厚時 5 0 J以上，獲得了具有優異之韌性之熔接接頭。 再者，表1 3係表示熔接金屬之組成，熔接金屬中之 B/N之質量％比及粒界肥粒鐵之生成量。 經濟部智慧財凌局8工消費合作社印製 使用本發明之鋼線及焊劑，而熔接金屬中之B / N質 量％比之成爲本發明之範圍內之熔接接頭（熔接接頭 No . 2 - 1 , 2 — 2, 2-3，2 — 4，2 — 5)乃熔 接金屬中之粒界肥粒鐵生成量係1 〇面積％以下。獲得了 具有非常優異之韌性之熔接金屬。 -31 - 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 574380 經濟部智慧財1苟員工消費合作社印¾ A7 B7五、發明説明？9 ) (實施例3 ) 對於表7所示之母材組成之4 9 0 Μ P a級鋼板（板 厚t : 40mm)，建築構造用TMCP鋼板（板厚t : 6 0 m m )施予如第3圖所示之形狀之焊溝加工，藉由1 通道之潛弧熔接而製作了熔接接頭，焊溝形狀係採Y型焊 溝，焊溝角度爲3 5 ° ，熔接根面d ( m m )，即板厚t :4 0mm時爲2mm，板厚t : 6 〇mm時即定爲3 m m 〇 潛弧熔接係使用二電極之潛弧熔接機，而以表1 4所 示之熔接條件，使用表1 ·5所示之鋼線組成之熔接用鋼線 ，使用表1 6所示之組成之焊劑而實施熔接。 又焊劑乃將原料配合成爲表1 6所示之組成，與矽酸 鈉水溶液（添加量每一焊劑1公斤約2 0 0 cc ) —齊混練 、造粒之後，於5 0 0 °C X 1 5 m i η之條件燒成，粒子 徑定爲3mm以下。 又表1 6中之化學組成共計不到1 〇 〇質量％，惟剩 餘部乃矽酸鈉固形份及不可避免之不純物。 再者添加於焊劑中之鐵粉係使用霧化鐵粉，使用表 17所示之氮含有量之霧化鐵粉。熔接輸入熱乃，板厚 4〇111111時269匕】/(：111，板厚6〇111111時即521 k J / c m 〇 對於如上述地獲之熔接接頭，而從熔接長度中央部之 第2A圖，第2B圖所示之位置而採取試驗片，調查了熔 接金屬之抗拉強度、韌性。 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210><297公釐） -32- 574380 A7 _ B7_ 五、發明説明？◦) (請先閲讀背面之注意事項再填寫本頁) 抗拉試驗係從第2 A圖之位置採取試驗片，依據 JIS Z 3111之規定求出抗拉強度TS。又衝擊 試驗乃從第2 B圖之位置採取試驗片，依據J I S Z 3 1 1 2之規定實施試驗，求出了於0°C之夏氏吸收能量 値 v E 〇 〇 這些結果彙集於表1 8表示之。 本發明例乃，均熔接金屬之v E 〇滿足2 7 J以上，獲 得了具有優異之訪性之熔接接頭。脫離本發明之範圍之比 較例乃熔接金屬之韌性呈顯低落。 表1 9係表示熔接金屬之組成，熔接金屬中之B / N 之比與粒界肥粒鐵之生成量。 使用本發明之焊劑之熔接金屬中之粒界肥粒鐵生成量 係呈顯1 5 · 0面積％以下，獲得了具有優異之韌性之熔 接金屬。 又，熔接金屬中之B/N質量％比之成爲本發明之範 圍內之熔接接頭（熔接接頭No · 3 — 5, No . 3 - 9 ，3 - 10)乃，熔接金屬中之粒界肥粒鐵生成量爲1〇 面積％以下，具有更佳之韌性。 經濟部智慧財產局員工消費合作社印製 依本發明時，藉由熔接輸入熱1 5 Ok J/cm以上 之有高熱量輸入之潛弧熔接來熔接T i , .Nb等之含有量 少之鋼材之情形下，仍然，安定的可以獲得具有優異之韌 性之熔接金屬，顯著地可以提高熔接效率，可以奏產業上 顯著之效果者。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -33- 574380 A7 B7五、發明説明？1 ) 圖式之簡單說明 第1A圖係表示使用於本發明之實施例1之熔接接頭 之焊溝形狀之槪要之模式圖。 第1 B圖係表示使用於本發明之實施例1之熔接接頭 之焊溝形狀之槪要之模式圖。 第2 A圖係模式的說明於實施例1〜3所採用之抗伸 試驗片之採取位置之說明圖。 第2 B圖係模式的說明於實施例1〜3所採用之衝擊 試驗片之採取位置之說明圖。 第3圖表示使用本實施例2及3之熔接接頭焊溝形狀 之槪要模式圖。 第4圖表示熔接金屬中之粒界肥粒鐵生成量與夏氏吸 收能量（v E。）之關係圖。 第5圖表示熔接金屬中之B/N質量％比與粒界肥粒 鐵生成量之關係圖。 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -34- 574380CaC〇3: 5 to 15%, Mg〇: 15 to 38%, Al2〇3: 3 to 20%, Ti〇2: 2 to 10%, C a F 2: 2 to 10%, atomized iron powder , M o powder, molybdenum iron powder, N b powder and metal powder other than silver iron powder: one or two or more selected from 2 to 8%. The flux for welding according to the present invention contains one or more of the above-mentioned iron powder (atomized iron powder), B compound powder, and Mo powder, molybdenum iron powder, Mo compound powder, Nb powder, iron niobium powder, Nb One of the compound powders or this paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -23- 574380 Employees of Intellectual Property Bureau of the Ministry of Economic Affairs of the consumer Ti printing A7 B7 5. Invention description (21) Two or more kinds, In addition to Si〇2, CaC03, Mg〇, A 1 2 0 3, T i 0 2, CaF2, and atomized iron powder, Μο powder, molybdenum iron powder, N b powder, iron niobium powder One or more of the powders are suitable. S i〇2 is an effective ingredient of the slag-forming agent. It is desirable to include it in order to adjust the viscosity of the slag. When the content of S i〇2 is less than 10%, the melting point of the generated slag tends to increase. On the other hand, when the content is more than 28%, the melting point becomes too low and the appearance of the bead is prone to be disturbed. , And the amount of oxygen of the weld metal increases, and the toughness of the weld metal tends to deteriorate. Therefore, S i 0 2 is preferably 10% to 28%. The CaC03 system is decomposed into CaO and C02 during welding, so that the C02 gas shields the welding metal from the outside air, and at the same time, reduces the hydrogen partial pressure in the welding environment, and effectively acts to prevent hydrogen. Intrudes into weld metal. In addition, C a 0 is an alkaline component, which raises the slag and has the effect of improving the toughness of the weld metal. When the content of C a C03 is less than 5%, the shielding effect caused by the above C02 gas cannot be seen. There is a tendency for hydrogen cracking resistance to decrease. On the other hand, if it is contained more than 15%, the amount of CO2 gas will increase, and the welding workability will deteriorate the appearance of the bead. Therefore, it is appropriate to set C a C 0 3 to a range of 5 to 15%. M g 0 has the effect of preventing excessive flow of the flux. It also has the effect of stabilizing the bead shape when welding with high heat input. In addition, Mg 0 increases the alkalinity of the slag and reduces the oxygen content in the weld metal. (Please read the precautions on the back before filling out this page.) This paper size is applicable to China National Standard (CNS) 8-4 (210X297 mm ) -24- 574380 Intellectual Property Bureau of the Ministry of Economic Affairs g (industrial-consumer cooperation ti printed A7 __ B7 V. Invention Description (22) A component useful for improving the toughness of welded metals. The content of Mg 0 is less than 1 5 The above effect cannot be seen at%. On the other hand, when it is contained in excess of 38%, the melting point is too high, and the appearance of the bead tends to deteriorate. Therefore, it is appropriate to set the range of 15 to 38%. A 1 2 03 can increase the melting point of the slag without reducing the viscosity, so it is an effective ingredient in adjusting the melting point of the slag. When the content of A 1 2 03 is less than 3%, the above will not appear. Effect, on the other hand, if it is contained more than 20%, the melting point of the slag is too high to cause uneven bead width or deterioration of appearance. Therefore, the content of A 1 2 03 is in the range of 3 to 20%. It is suitable. T i〇2 can improve the slag fluidity, in order to improve the peelability of the slag. Part of the arc cavity is reduced and migrates in the weld metal as Ti, which effectively improves the toughness of the weld metal. However, when the content of Ti is less than 2%, the above effect will not appear, and On the other hand, if the content exceeds 10%, the appearance of the bead will be degraded. Therefore, T i〇2 is preferably set to a range of 2 to 10%. C a F 2 can be increased without increasing the melting point. The alkalinity of the slag is effective for adjusting the oxygen content of the weld metal. When the content of C a F2 is less than 2%, the effect is reduced. On the other hand, when it exceeds 10%, the viscosity of the slag is too low. The appearance of the channel will be deteriorated. Therefore, the CaF.2 system is preferably set to a range of 2 to 10%. Metal powders other than atomized iron powder, MO powder, molybdenum iron powder, Nb powder, and iron niobium powder are used. It is added as a source of deoxidizer or alloy element, but if its content is less than 2%, it will be difficult to ensure the toughness of the weld metal and the appearance of the weld bead (please read the precautions on the back before filling this page) This paper size is applicable to China National Standard (CNS) A4 specification (210X297 mm) 25- 574380 Intellectual Property Bureau of the Ministry of Economic Affairs Printed by Fei Cooperative A7 ___B7 V. Invention Description (23) There is a tendency to deteriorate. On the other hand, if it is contained in more than 8%, the oxygen content of the weld metal will be reduced, and the structure of the weld metal will become toughened or the main body of the Asa Intermediate The toughness of the welded metal tends to decrease, so the metal powder other than atomized iron powder, MO powder, molybdenum iron powder, N b powder, and ferroniobium powder is set to a range of 2 to 8%. This metal powder is suitable. There are ferromanganese powder, ferrosilicon powder, ilmenite powder, manganese, titanium, etc., and the metal powder is in the form of a foil other than powder, and needle-shaped. In the flux of the present invention, the above-mentioned flux raw materials are quantitatively blended in the above-mentioned range, mixed with the bonding agent, and then granulated and fired. Although the granulation method is not particularly limited, it is convenient to use a rotary granulator, an extrusion granulator, or the like. After granulation, the whole granules are removed by removing dust, coarse granules, etc., and it is suitable to make granules with an average diameter of 0.075 to 5 mm. As the binding agent, an aqueous solution of polyvinyl alcohol, an aqueous solution of sodium silicate, an aqueous solution of potassium silicate, and a mixed solution of an aqueous solution of sodium silicate and an aqueous solution of potassium silicate are suitable. The added amount of the binder is preferably about 50 to 30 Occ per 1 kg of the flux raw material. In addition, the flux for welding according to the present invention is naturally applicable to submerged arc welding with a low heat input of less than 150 kJ / cm. It is possible to obtain a welded metal having excellent toughness stably. Further, the steel wire for welding when the flux for welding according to the present invention is used is not particularly limited, and any steel wire for submerged arc welding may be used as long as it is conventionally known. Next, there is a high heat input with excellent toughness of the welded metal part (please read the precautions on the back before filling this page) This paper size applies to Chinese National Standard (CNS) A4 specification (210X297 mm) -26- 574380 A7 _____B7 _ 5. Description of the invention? 4) Manufacturing method of submerged arc welding joint. (Please read the precautions on the back before filling this page) The manufacturing method of the submerged arc welding joint with high heat input according to the present invention is to use steel with low T i, N b content as the welding material, and Submerged arc welding with a high heat input of more than 150 k J / cm is particularly effective for welding metals with high toughness when performing welding. The steel material used as the material to be welded has a T i content of 0.0006% by mass or less, an Nb content of 0.012% by mass or less, and preferably a base metal composition having an N content of 0.0005% or less. Of steel. Other ingredients include C ·· 〇. 07 ~ 18%, Si: 0.40% or less, Μη: 1.00 ~ 1.60%, P: 0.020% or less, S: 0.10%, or A1: 0 · 0 5 The content is preferably 0% or less, and it may contain V in addition to the above components. The steel materials referred to in the present invention include: thick steel plates, shaped steel, steel pipes, and rod pipes. After the above-mentioned steel material is subjected to a predetermined groove processing (open-first processing), flux is dispersed in the welding groove, and the above-mentioned submerged arc welding steel wire with high heat input is used, and the heat is inputted by 150 kJ / cm. The above-mentioned submerged arc welding with high heat input performs welding. Printed by the Consumer Cooperative of the 4th Bureau of the Ministry of Economic Affairs, the submerged arc welding of the present invention is a conventional welding method including submerged arc welding of multiple electrodes, which can be applied without special limitation, and the welding conditions do not need to be particularly limited. Based on the above-mentioned material to be welded and the material to be welded, the welded joint (welded structure) is produced by submerged arc welding with a high heat input of 150 k J / cm or more and a heat input. And the obtained melting -27- This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 574380 A7 B7 V. Description of the invention? 5) The welding metal of the joint (welding structure) will become a high toughness welding metal. (Please read the precautions on the back before filling in this page) (Example 1) On the 490 MPa grade a steel sheet (plate thickness: 25mm, 40mm) of the base metal composition shown in Table 1, give 1A The welding groove of the shape shown in FIG. 1B is processed, and submerged arc welding of one channel is used to make a welded joint. When the thickness of the steel plate is 2.5 mm, the shape of the welding groove is an L-shaped welding groove, the angle of the welding groove is 40 °, and the root surface of the weld is 2 mm. In addition, the welding groove shape of the steel plate with a thickness of 40 m m is a Y-shaped welding groove. The welding groove angle is 35 °, and the root surface of the welding is set to 3 mm. Submerged arc welding is performed using a two-electrode submerged arc welding machine. The welding conditions shown in Table 2 were performed using steel wires (welding rods) for welding shown in Table 3. The flux used is a commercially available iron-added powder firing flux containing 0.4% by mass of boron oxide containing the composition shown in Table 4. The iron powder contained in the flux is made of sponge iron powder. Iron powder, welding input heat system is 153 kJ / cm when the plate thickness is 25mm, 270kJ / cm when the plate thickness is 40mm, and it is printed by the employee consumer cooperative of the Bureau of Intellectual Property, Bureau of Economic Affairs, Ministry of Economic Affairs. The test piece was taken at the positions shown in Figures 2A and 2B of the center portion in the longitudinal direction of the welding. The tensile strength, toughness and tensile test of the welded metal were investigated in accordance with JIS Z 3111, and the impact test was implemented in accordance with JIs Z 3112 to obtain the tensile strength TS, and 0 ° C, — 20 ° c's Charpy absorbed energy 値 vE〇, VE-20. This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) -28- 574380 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 _____B7 V. Description of the invention? 6) These results are compiled in Table 5. In the examples of the present invention, the v E 0 of the weld metal is 2 7 J or more, and a weld joint having an excellent toughness equal to or higher than the general level of the base metal specification is obtained. Welding joints obtained by using steel wires containing Mo and Nb within the scope of the present invention (welding joints No. 3, No. 0.4, No. 0.5) are welded metal systems v E-2 0 is more than 2 7 J's excellent toughness. On the other hand, a comparative example (welded joint No. 0.6) in which the N content of the steel wire is far outside the scope of the present invention, that is, the weld joint has v E 〇 less than 27 J, and the toughness is deteriorated. In addition, the Ti content of the steel wire deviated from the comparative example (welding joint No. 7) of the present invention, that is, the structure was coarsened, and the vEo of the welding metal was less than 27 J, indicating that the toughness was deteriorated. In addition, the comparative examples (weld joint No. 6, No. 7, No. 8) where the Ti / N of the steel wire deviated from the scope of the present invention were v E 〇 less than 2 7 J of the weld metal, and the toughness deteriorated. Further, a comparative example (welded joint No. 9) having a high Ti content outside the scope of the present invention is a structure in which the upper part becomes a toughened main body, and v E 0 of the welded metal is less than 2 7 J, and the toughness is deteriorated. ) Further, a comparative example (welded joint No. 10) where the M η content of the steel wire is low and out of the scope of the present invention, and a comparative example (welded joint N) which is out of the scope of the present invention is high in the Si content of the steel wire 〇. 1 1) The ferrous iron of the weld metal is coarsened, and v E 〇 is less than 2 7 J, which shows the deterioration of the toughness of the weld metal. (Please read the precautions on the back before filling this page) This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -29- 574380 A7 B7 5. Description of the invention? 7) Table 6 shows the composition of the weld metal, the mass% ratio of B / N in the weld metal and the amount of iron produced at the grain boundary. In the example of the present invention, the amount of grain boundary fertilizer and iron in any of the welded metals is less than 15% by area, and the fusion is obtained (please read the precautions on the back before filling this page). The v EQ of the welded metal is 2 7 Welding joints with excellent toughness above J. Furthermore, using a steel wire containing M 0, N b within the scope of the present invention, and the B / N mass% ratio in the welded metal can be within the scope of the present invention. Welded joints (welded joints No. 3, No. 4, No. 5) The amount of grain boundary ferrous iron in the welded metal is less than 10% by area, and v E-2 with welded metal exceeds 2 7 J's excellent toughness. (Example 2) A 490 MPa grade P a steel plate (plate thickness t: 40 mm) and a TMCP steel plate (plate thickness t: 60 mm) for the base material composition shown in Table 7 were applied as shown in Table 3. As shown in the welding groove processing, the welding joint is implemented by submerged arc welding of one channel. The shape of the welding groove is a Y-shaped welding groove. Welding groove angle 35 °, welding root surface d (mm), plate thickness t: 40mm, printed by the Consumer Cooperative of the 4th Bureau of the Ministry of Economic Affairs, 2mm when printed, and 3mm when plate thickness t: 60mm. Submerged arc welding uses a two-electrode submerged arc welding machine. The welding conditions shown in Table 8 are used, and the steel wire for welding is composed of the steel wires shown in Table 9. The flux is mixed with the raw materials to have the composition as shown in Table 10, and is kneaded together with a sodium silicate aqueous solution. After granulation, it is fired under the conditions of 500 ° CX 1 5 mi η, and the particle diameter is 3 mm or less. The size of the paper containing boron oxide and iron is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 mm) -30- 574380 A7 __ B7 5. Description of the invention? 8) Powder flux. For the iron powder added to the flux, iron powders having the nitrogen content shown in Table 11 were used. When the welding input thermal system is 40mm thick, it is 269 kJ / cm, and when it is 60mm thick, it is 549kJ / cm. (Please read the precautions on the back before filling in this page.) The weld joint obtained as described above was tested from the position shown in Figure 2A and Figure 2B of the central part of the weld length direction in the same manner as in Example 1. Sheet, the tensile strength and accessibility of the welded metal were investigated. The tensile test was performed in accordance with JISZ 3 1 11 as in Example 1. The impact test was performed in accordance with JIs Z 3112. The tensile strength TS and the temperature between 0 ° C and 2 0 ° C were determined. Xia's absorbed energy 値 v E ◦, VE-2 〇. The results are shown in Table 12-2. The welded joints using the steel wire and flux of the examples of the present invention are such that v E 〇 of the weld metal satisfies 100 mm or more at a thickness of 40 mm and 47 or more at a thickness of 60 mm. v E-2 0 meets the requirements respectively, the plate thickness is 40J or more and 80J or more, and the plate thickness is 60mm or more, it is 50 J or more. Welding joints with excellent toughness are obtained. In addition, Table 1 3 shows the composition of the weld metal, the mass% ratio of B / N in the weld metal, and the amount of iron produced at the grain boundary. The Ministry of Economic Affairs and the Intellectual Property Bureau of the 8th Industrial Cooperative Cooperative printed and used the steel wire and flux of the present invention, and the B / N mass% ratio of the welded metal became a welded joint within the scope of the present invention (welded joint No. 2-1 , 2 — 2, 2-3, 2 — 4, 2 — 5) is the grain boundary fertilizer in the welded metal. The amount of iron produced is less than 10% by area. A weld metal having very excellent toughness was obtained. -31-This paper size is in accordance with Chinese National Standard (CNS) A4 (210X297 mm) 574380 Printed by the Consumers ’Cooperative of Intellectual Property of the Ministry of Economic Affairs A7 B7 V. Description of the invention? 9) (Example 3) The 490 MPa grade P a steel plate (plate thickness t: 40 mm) and the TMCP steel plate (plate thickness t: 60 mm) for the base material composition shown in Table 7 were given as shown in Table 7. The welding groove in the shape shown in Figure 3 is made by submerged arc welding of 1 channel. The welding groove shape is a Y-shaped welding groove with a welding groove angle of 35 ° and a welding root surface d (mm ), That is, the plate thickness t: 2mm at 40mm, and the plate thickness t: 60mm, it is set to 3mm. The submerged arc welding system uses a two-electrode submerged arc welding machine, and the welding conditions shown in Table 14 Welding is performed by using the steel wire for welding composed of the steel wires shown in Tables 1 and 5 and using the flux shown in Table 16 for welding. The flux is mixed with the raw materials to form the composition shown in Table 16, and mixed with sodium silicate aqueous solution (additional amount of about 2 0 cc per 1 kg of flux)-after mixing and granulating, at 500 ° CX 1 5 The firing is performed under the conditions of mi η, and the particle diameter is set to 3 mm or less. The chemical composition in Table 16 totals less than 1000% by mass, but the remainder is the solid content of sodium silicate and inevitable impurities. The iron powder to be added to the flux was atomized iron powder, and atomized iron powder having the nitrogen content shown in Table 17 was used. Welding input heat, plate thickness 4〇111111, 269 dagger] / (: 111, plate thickness 6〇111111, 521 k J / cm 〇 For the welded joint obtained as described above, the 2A from the center of the welded length The test piece was taken at the position shown in Figure 2B, and the tensile strength and toughness of the welded metal were investigated. (Please read the precautions on the back before filling out this page.) This paper size applies the Chinese National Standard (CNS) A4 specification. (210 > < 297 mm) -32- 574380 A7 _ B7_ V. Description of the invention? ◦) (Please read the notes on the back before filling this page) The tensile test is to take the test piece from the position shown in Figure 2A According to JIS Z 3111, the tensile strength TS was obtained. In the impact test, a test piece was taken from the position shown in Fig. 2B, and the test was performed in accordance with JISZ 3 1 12. The Charpy absorbed energy 値 v E 〇0 at 0 ° C was obtained. These results are summarized in Table 1 8 Express it. In the example of the present invention, v E 0 of all welded metals satisfies 2 7 J or more, and a welded joint having excellent accessibility is obtained. A comparative example that deviates from the scope of the present invention is that the toughness of the weld metal is significantly lowered. Table 19 shows the composition of the weld metal, the ratio of B / N in the weld metal, and the amount of iron produced at the grain boundary. The amount of grain boundary ferrous iron in the weld metal using the flux of the present invention is not more than 15 · 0 area%, and a weld metal having excellent toughness is obtained. In addition, the ratio of B / N mass% in the weld metal is a weld joint (weld joint No. 3-5, No. 3-9, 3-10) within the scope of the present invention, and the grain boundary fertilizer in the weld metal The amount of grain iron produced is 10% by area or less, and has better toughness. When printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs according to the present invention, submerged arc welding with high heat input with welding input heat of 15 Ok J / cm or more is used to weld steels with low contents of T i, .Nb, etc. In this case, still, a stable welding metal having excellent toughness can be obtained, which can significantly improve the welding efficiency, and can achieve significant effects in the industry. This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) -33- 574380 A7 B7 V. Description of invention? 1) Brief Description of Drawings FIG. 1A is a schematic diagram showing the outline of the shape of the welding groove of the welded joint used in the first embodiment of the present invention. Fig. 1B is a schematic diagram showing the outline of the shape of the welding groove of the welded joint used in the first embodiment of the present invention. Fig. 2A is a diagram for explaining the mode of taking positions of the tensile test pieces used in Examples 1 to 3. Fig. 2B is an explanatory diagram for explaining the mode of taking positions of the impact test pieces used in Examples 1 to 3. Fig. 3 is a schematic view showing the outline of the shape of the welding grooves of the welded joints of the second and third embodiments. Fig. 4 is a graph showing the relationship between the amount of iron produced at the grain boundary in the weld metal and the absorbed energy (v E.) of Charpy. Fig. 5 is a graph showing the relationship between the B / N mass% ratio in the weld metal and the amount of iron produced at the grain boundary. (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -34- 574380

A B 五、發明説明？2 ) 經濟部智慧財4局a(工消費合作社印製 化學成份（質量％) > 1 0.030 0.030 0.0021 0.0030 0.0040 g 0.003 0.008 0.005 0.003 〇〇 0.003 0.003 Plh 0.015 0.015 C 1.48 1.36 ΰο 0.35 0.33 U 0.14 0.13 板厚 mm wn CsJ 〇 級別 SN-490C SN-490C 鋼板 No 胃 H oa (請先閲讀背面之注意事項再填寫本頁)A B V. Explanation of invention? 2) Bureau of Wisdom Wealth, Ministry of Economic Affairs a (printed chemical composition (mass%) by industrial and consumer cooperatives) > 1 0.030 0.030 0.0021 0.0030 0.0040 g 0.003 0.008 0.005 0.003 〇〇0.003 0.003 Plh 0.015 0.015 C 1.48 1.36 0.3ο 0.35 0.33 U 0.14 0.13 Plate thickness mm wn CsJ 〇 Grade SN-490C SN-490C Steel plate No stomach H oa (Please read the precautions on the back before filling this page)

HI i · I I、一\"J φψ 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -35- 574380 A7 B7 五、發明説明？3 經濟部智慧財/i局員工消费合作社印製 備考 板厚25mm 板厚40mm 熔接條件 輸入熱量 kJ/cm cn τ—Η ο 熔接速度 cm/min ΟΝ CO oo CSI 後行極 電壓 V 電流 A 1150 1400 鋼線徑 mm s 先行極 電壓 V CO 電流 A 1500 1800 鋼線徑 mm 2 2 熔接 條件 cd (請先閱讀背面之注意事項再填寫本頁) 訂 •f 本紙張尺度適用中國國家標準（CNS ) A4規格（210X29*/公釐） 36 574380HI i · I I, one \ " J φψ This paper size is applicable to China National Standard (CNS) A4 specification (210X297 mm) -35- 574380 A7 B7 V. Description of the invention? 3 Ministry of Economic Affairs, Intellectual Property / i Bureau, Consumer Cooperative Cooperative Production Test Board Thickness 25mm, Plate Thickness 40mm, Welding Condition Input Heat kJ / cm cn τ—Η ο Welding Speed cm / min oon CO oo CSI Backward Voltage V Current A 1150 1400 Steel wire diameter mm s Leading pole voltage V CO current A 1500 1800 Steel wire diameter mm 2 2 Welding conditions cd (Please read the precautions on the back before filling out this page) Order • f This paper size applies to Chinese National Standard (CNS) A4 Specifications (210X29 * / mm) 36 574380

A B 五、發明説明？4 ) 經濟部智慧財產局員工消費合作社印製 備考 本發明例 本發明例 本發明例 本發明例 本發明例 比較例 比較例 比較例 比較例 比較例 比較例 丨匕學成份（質量％) • 1-H 1 1 vrj 1 1 1 1 1 1 1 1 m 1 1 1 0.0010 .1 1 1 1 ! 1 1 g 1 1 1 1 0.080 1 1 1 1 1 1 ο s 1 1 0.50 0.20 1 1 1 1 1 1 1 Ti/N VO VO CNl CO CO VO 21 ΓΗ VO 2 0.0022 0.0032 0.0020 0.0024 0.0025 0.0040 0.0030 0.0030 0.0031 0.0024 0.0025 • 0.100 0.080 0.030 0.080 0.040 0.050 0.020 0.040 0.22 0,40 ! 0.040 GO 0.005 0.006 0.005 1 0.003 0.002 0.003 0.003 0.003 0.003 1 0.003 0.004 Plh 0.009 0.015 0.010 0.009 0.008 0.016 0.016 I 0.015 0.015 0.012 0.010 a s 1.80 2.20 1.50 1.20 2.40 1.90 1.80 1.80 1.80 0.80 1 1.90 $ 0.05 0.35 0.30 0.03 0.02 0.01 0.30 0.20 0.20 0.02 0.50 u 0.06 0.04 0.05 0.08 0.07 0.06 0.06 0.07 0.07 1 0.06 0.08 鋼線 No < PQ u Q m Ph Ο Κ-Η I------------^---IT----- (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -37- 574380 A7 B7 五、發明説明？5 ) 寸術 經濟部智慧財產局員工消費合作社印製 化學組成（質量％) 鐵粉以外之金屬粉 VO 鐵粉 B2O3 寸 〇 CaF2 寸 Ti〇2 AI2O3 OO CaC〇3 ON Mg〇 S1O2 焊劑 ^0 (請先閱讀背面之注意事項再填寫本頁)A B V. Explanation of invention? 4) Examination of the preparation of the seal of the consumer cooperative of the employee of the Intellectual Property Bureau of the Ministry of Economic Affairs of the present invention. The present invention. The present invention. The present invention. The comparative example. The comparative example. The comparative example. The comparative example. -H 1 1 vrj 1 1 1 1 1 1 1 1 m 1 1 1 0.0010 .1 1 1 1! 1 1 g 1 1 1 1 0.080 1 1 1 1 1 1 ο s 1 1 0.50 0.20 1 1 1 1 1 1 1 1 Ti / N VO VO CNl CO CO VO 21 ΓΗ VO 2 0.0022 0.0032 0.0020 0.0024 0.0025 0.0040 0.0030 0.0030 0.0031 0.0024 0.0025 0.001 • 0.00 00 0.080 0.030 0.080 0.040 0.050 0.050 0.020 0.040 0.22 0,40! 0.040 GO 0.005 0.006 0.005 1 0.003 0.002 0.003 0.003 0.003 0.003 1 0.003 0.004 Plh 0.009 0.015 0.010 0.009 0.008 0.016 0.016 I 0.015 0.015 0.012 0.010 as 1.80 2.20 1.50 1.20 2.40 1.90 1.80 1.80 1.80 0.80 1 1.90 $ 0.05 0.35 0.30 0.03 0.02 0.01 0.30 0.20 0.20 0.02 0.50 u 0.06 0.04 0.05 0.08 0.07 0.06 0.06 0.06 0.07 0.07 1 0.06 0.08 Steel wire No < PQ u Q m Ph Ο Κ-Η I ------------ ^ --- IT ----- (Please read the precautions on the back first (Fill in this page again) National Standards (CNS) A4 size (210X297 mm) -37- 574380 A7 B7 V. invention will be described? 5) Printed chemical composition (mass%) of the consumer cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs of the Ministry of Economic Affairs, metal powder other than iron powder, VO iron powder, B2O3 inch 〇CaF2 inch Ti〇2 AI2O3 OO CaC〇3 ON Mg〇S1O2 flux ^ 0 ( (Please read the notes on the back before filling out this page)

本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -38 574380 A7 B7 五、發明説明？6 ) 經濟部智慧財產局員工消費合作社印製 LO撇 備考 . 本發明例 i本發明例 本發明例 本發明例 本發明例 比較例 比較例 比較例 比較例 比較例 比較例 抗拉強度 TS (MPa) ON 〇〇 VO CN CNI CO csl VO VO ON OO oo VO o 5 OO OO § 韌性 οα CO oo CO VO t—H csi VO i i 卜 > w ΙΟ r-H 5S ON C<l CO csi v〇 (N1 csi CNl 熔接組合 熔接 條件 a X) 二 c^i 〇3 c3 X) JD 焊劑 No ρί 鋼線 No. < PQ U Q Ol Kl Η-(I ►—>1 鋼材 No. r—Η C<l Csi r-H t—H r—H cvl C<| 4 CM 熔接接頭 No CNl CO 寸 卜 oo ON 〇 Γ" < (請先閲讀背面之注意事項再填寫本頁)This paper size applies to Chinese National Standard (CNS) A4 specification (210X297 mm) -38 574380 A7 B7 5. Description of the invention? 6) Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, printed a LO test. Inventive Example i Inventive Example Inventive Example Inventive Example Inventive Example Comparative Example Comparative Example Comparative Example Comparative Example Comparative Example Tensile Strength TS (MPa ) ON 〇〇VO CN CNI CO csl VO VO ON OO oo VO o 5 OO OO § Resilience ο α CO oo CO VO t—H csi VO ii B > w ΙΟ rH 5S ON C < l CO csi v〇 (N1 csi CNl Welding combination welding conditions a X) Two c ^ i 〇3 c3 X) JD Flux No ρί Steel wire No. < PQ UQ Ol Kl Η- (I ►— > 1 Steel No. r—Η C < l Csi rH t—H r—H cvl C < | 4 CM Fusion Splice No CNl CO Inch oo ON 〇Γ " < (Please read the precautions on the back before filling this page)

本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -39- 574380 五、發明説明？7 )This paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) -39- 574380 5. Explanation of the invention? 7)

A B 經濟部智慧財產局員工消費合作社印製 備考 本發明例 本發明例 本發明例 本發明例 本發明例 比較例 比較例 比較例 比較例 比較例 比較例 ^ _ 晒驪鹧 領ώ g 跑§ _ 13.1 r"H r-H 〇〇 CN 〇6 σ< 18.7 17.5 16.8 15.2 23.1 28.3 1 Έ Μ ^ 1 0.55 0.51 0.71 0.81 0.60 0.40 0.47 0.49 0.52 0.52 I 0.53 pq 0.0017 0.0020 0.0022 0.0026 0.0018 0.0016 0.0017 0.0019 0.0017 0.0017 π 0.0018 • 1—* 1 1 0.19 1 1 1 1 1 1 I g 0.002 0.003 0.003 0.003 0.034 0.002 0.002 0.004 0.002 0.002 I 0.003 ο S 1 1 0.20 0.09 1 1 1 1 1 1 I 2 0.0031 0.0039 0.0031 0.0032 0.0030 0.0040 1 0.0036 0.0039 0.0033 | 1 0.0033 0.0034 0.030 0.024 1 1 0.005 0.025 0.013 0.010 0.004 0.008 0.071 0.011 0.007 a s 1.46 1.56 1.38 1.33 1.77 1.52 1.44 1.39 1 1.46 | 1.06 0.31 0.42 0.39 0.33 0.30 0.28 0.40 I 0.35 0.36 0.30 0.52 u 0.10 0.09 1—- 0.09 Ο 0.10 0.10 0.10 0.11 r-H Ο 0.10 0.10 熔接 接頭 No "丨Η CM CO 寸 VO ν〇 卜 〇〇 ON ο ，η (請先閱讀背面之注意事項再填寫本頁)AB Intellectual Property Bureau, Ministry of Economic Affairs, Employees, Consumer Cooperatives, Printing, Preparation, Examination, Invention Example, Invention Example, Invention Example, Invention Example, Comparative Example, Comparative Example, Comparative Example, Comparative Example, ^ 骊 鹧 骊 鹧 骊 鹧 § _ 13.1 r " H rH 〇〇CN 〇6 σ < 18.7 17.5 16.8 15.2 23.1 28.3 1 Έ Μ ^ 1 0.55 0.51 0.71 0.81 0.60 0.40 0.47 0.49 0.52 0.52 I 0.53 pq 0.0017 0.0020 0.0022 0.0026 0.0018 0.0016 0.0017 0.0019 0.0017 0.0017 π 0.0018 • 1 -* 1 1 0.19 1 1 1 1 1 1 1 I g 0.002 0.003 0.003 0.003 0.034 0.002 0.002 0.004 0.002 0.002 I 0.003 ο S 1 1 0.20 0.09 1 1 1 1 1 1 I 2 0.0031 0.0039 0.0031 0.0032 0.0030 0.0040 1 0.0036 0.0039 0.0033 0.0033 | 1 0.0033 0.0034 0.030 0.024 1 1 0.005 0.025 0.013 0.010 0.004 0.008 0.071 0.011 0.007 as 1.46 1.56 1.38 1.33 1.77 1.52 1.44 1.39 1 1.46 | 1.06 0.31 0.42 0.39 0.33 0.30 0.28 0.40 I 0.35 0.36 0.30 0.52 u 0.10 0.09 1--0.09 0 0.10 0.10 0.10 0.11 rH Ο 0.10 0.10 Welded joint No " 丨 Η CM CO Inch VO ν〇 卜 〇〇ON ο, please ( (Read the notes on the back before filling out this page)

本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -40- 574380 A7 B7 五、發明説明？8 ) 經濟部智慧財產局員工消費合作社印製 化學成份（質量％) > 0.030 0.002 i 0.021 0.026 0.0040 0.0032 g 0.008 0.010 0.003 0.006 〇〇 0.003 0.002 cu 0.015 0.011 c: 1.36 1.45 0.33 0.26 0.13 0.13 板厚 mm O § 級別 SN-490C TMCP 鋼 鋼板 No CO 寸 (請先閱讀背面之注意事項再填寫本頁) 、11 ί 本紙張尺度適用中國國家標準（CNS ) Α4規格（210'〆297公釐） -41 - 574380 A7 B7 五、發明説明？9 ) 經濟部智慧財產局3工消費合作社印製 00撇 寒 ε e O tt 追 ε ε S 1¾ 竖 瑯 _ 驢 ε ON VD oa Ον uo m m 避 駿 C Β ε ο oo csl ON m it 鏗 mi KM 、 w 等 吞 |tf o 寸 H Ο oo r—Η 纏I 疆 s s 圈 it Iff ^ 芝 oo CO 惩< 瓣^ o oo t—H o CO <N Lti c 纏_ m 2 s 逡 结: u T3 ------------^---1T------ (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -42- 574380 A7 B7 五、發明説明f〇 ) 經濟部智慧財產局員工消費合作社印製 備考 本發明例 化學離（質㈣ •— 1 PQ 1 g * 〇 1 Ti/N. v〇 Csl 2 0.0032 0.079 GO 0.005 Ph 0.012 C s 2.08 0.33 u 0.05 鋼線 (請先閲讀背面之注意事項再填寫本頁)This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) -40- 574380 A7 B7 V. Description of the invention? 8) Chemical composition (mass%) printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs > 0.030 0.002 i 0.021 0.026 0.0040 0.0032 g 0.008 0.010 0.003 0.006 〇〇0.003 0.002 cu 0.015 0.011 c: 1.36 1.45 0.33 0.26 0.13 0.13 plate thickness mm O § Grade SN-490C TMCP steel plate No CO inch (please read the precautions on the back before filling this page), 11 ί This paper size applies the Chinese National Standard (CNS) Α4 specification (210'〆297 mm) -41 -574380 A7 B7 5. Explanation of the invention? 9) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, 3 Industrial Cooperative Cooperatives, 00 skating cold ε e O tt chasing ε ε S 1 ¾ vertical _ donkey ε ON VD oa Ον uo mm Avoiding C C Β ε ο oo csl ON m it 铿 mi KM Tf o inch H Ο oo r—Η wrapped around I Xinjiang ss circle it Iff ^ oo CO punishment < flap ^ o oo t—H o CO < N Lti c wrapped _ m 2 s knot: u T3 ------------ ^ --- 1T ------ (Please read the precautions on the back before filling out this page) This paper size applies to China National Standard (CNS) A4 specifications (210X297 mm) -42- 574380 A7 B7 V. Description of the invention f〇) The production and examination of the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the preparation of the chemical examples of this invention (quality ㈣ • — 1 PQ 1 g * 〇1 Ti / N. v〇Csl 2 0.0032 0.079 GO 0.005 Ph 0.012 C s 2.08 0.33 u 0.05 Steel wire (Please read the precautions on the back before filling this page)

本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） -43- 574380 A7 B7 五、發明説明f1 ) 經濟部智慧財產局8工消費合作社印製 化學組成（質量％) 鐵粉以外之金屬粉 CO 鐵粉* CO CN CO CN CO (N CO CO v〇 a Β2〇3 CO XT VO c> cn ί CaF2 寸 寸 寸 寸 cn v〇 Ti〇2 VO VD VO m 卜 Ah〇3 oo 卜 r- 寸 r- CaCCh o o 〇 o On Mg〇 wo C<1 VO S1O2 On ON ON 焊劑 FL-2 FL-3 FL-4 FL-5 FL-6 FL-7 (請先閲讀背面之注意事項再填寫本頁)This paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) -43- 574380 A7 B7 V. Description of the invention f1) Chemical composition (mass%) printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, 8th Industrial Cooperative, except for iron powder Of metal powder CO iron powder * CO CN CO CN CO (N CO CO v〇a Β2〇3 CO XT VO c > cn CaF2 inch inch inch cn v〇Ti〇2 VO VD VO m ah Ah 03 oo bl r- Inch r- CaCCh oo 〇o On Mg〇wo C < 1 VO S1O2 On ON ON Solder FL-2 FL-3 FL-4 FL-5 FL-6 FL-7 (Please read the precautions on the back before filling this page )

本纸張尺度適用中國國家標準（CNS ) Α4規格（210Χ297公釐） -44- 574380 A7 B7 五、發明説明f2 ) 表1 1 鐵粉Ν 〇 · N含有量（質量％ ) a 0.0 0 2 0 β 0.0 0 2 8 r 0.0 0 4 5 (請先閱讀背面之注意事項再填寫本頁) 、π MW0! 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） -45- 574380 A7 B7 五、發明説明f3 ) 經濟部智慧財產局員工消費合作社印製This paper size applies Chinese National Standard (CNS) A4 specification (210 × 297 mm) -44- 574380 A7 B7 V. Description of invention f2) Table 1 1 Iron powder N 〇 · N content (% by mass) a 0.0 0 2 0 β 0.0 0 2 8 r 0.0 0 4 5 (Please read the notes on the back before filling out this page), π MW0! The paper printed by the Consumers' Cooperatives of the Intellectual Property Bureau of the Ministry of Economy applies the Chinese National Standard (CNS) Α4 specifications ( 210X297 mm) -45- 574380 A7 B7 V. Description of Invention f3) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs

srH撇 備考 ! 本發明例 本發明例 本發明例 本發明例 本發明例 本發明例 抗拉強度 TS (MPa) 寸 ON g ON ON VO CN 韌性 VE-20 (J) <N 〇〇 g OO C<l > 一 s r^H oo oo ON 熔接組合 熔接 條件 〇 o T3 T3 TD o 焊劑 No ί FL-2 FL-3 FL-4 FL-5 FL-6 Ί FL-7 j 鋼線 No. H-l J 鋼材 No. CO CO 寸 寸 寸 CO 熔接接頭 No cs oa C<l CO csi <N CN v〇 CNsrH Note! Inventive Examples Inventive Examples Inventive Examples Inventive Examples Inventive Examples Intensity TS (MPa) Inch ON g ON ON VO CN Toughness VE-20 (J) < N 〇〇g OO C < l > sr ^ H oo oo ON Welding combination welding conditions 0o T3 T3 TD o Flux No ί FL-2 FL-3 FL-4 FL-5 FL-6 Ί FL-7 j Steel wire No. Hl J Steel No. CO CO inch inch CO welded joint No cs oa C < l CO csi < N CN v〇CN

訂 (請先閱讀背面之注意事項再填寫本頁)Order (Please read the notes on the back before filling this page)

本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -46- 574380This paper size applies to China National Standard (CNS) A4 (210X297 mm) -46- 574380

A B 五、發明説明f ) 經濟部智慧財1局員工消費合作社印製A B V. Description of invention f) Printed by the Consumer Cooperatives of the 1st Bureau of Smart Finance, Ministry of Economic Affairs

備考 I i_ 本發明例 本發明例 本發明例 本發明例 本發明例 本發明例 _ 護 _ 鹧 領妇g 锄留ιΐή CNj αν s wn ON 14.7 任· 与 Έ Μ 1 1 ^ 1 0.78 1.04 0.65 0.61 0.60 0.52 PQ 0.0018 0.0025 0.0020 0.0022 0.0027 0.0015 1 I 1 1 0.05 _1 1 g 0.004 0.004 0.005 0.011 0.005 0.004 ο s 0.25 0.26 0.12 1 1 1 2 0.0023 0.0024 0.0031 0.0036 0.0045 _1 0.0029 •— 0.018 0.020 0.021 0.023 0.021 0.019 a s 1.44 1.48 1.53 1.50 1.47 *c75 0.46 1 .. 0.45 0.39 0.38 0.41 I 0.48 u ( 0.09 1 0.09 0.10 0.09 0.10 0.09 熔接 接頭 No οα 04 cn cs VO CN (請先閲讀背面之注意事項再填寫本頁)Remarks I_ Example of the invention Example of the invention Example of the invention Example of the invention Example of the invention_ Protect _ 鹧 领 女 g 锄 留 ιΐή CNj αν s wn ON 14.7 Ren · and Έ 1 1 ^ 1 0.78 1.04 0.65 0.61 0.60 0.52 PQ 0.0018 0.0025 0.0020 0.0022 0.0027 0.0015 1 I 1 1 0.05 _1 1 g 0.004 0.004 0.005 0.011 0.005 0.004 ο s 0.25 0.26 0.12 1 1 1 2 0.0023 0.0024 0.0031 0.0036 0.0045 _1 0.0029 • — 0.018 0.020 0.021 0.023 0.021 0.019 as 1.44 1.48 1.53 1.50 1.47 * c75 0.46 1 .. 0.45 0.39 0.38 0.41 I 0.48 u (0.09 1 0.09 0.10 0.09 0.10 0.09 Weld joint No οα 04 cn cs VO CN (Please read the precautions on the back before filling this page)

• m u n · m n、?T 0Ψ. 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -47- 574380 A7 B7 五、發明説明f5 ) 經濟部智慧財產局員工消費合作社印製 備考 板厚40mm 板厚60mm 熔接條件 |輸入熱量 kJ/cm On v〇 04 H CN 熔接速度 cm/min oo CSI 後行極 電壓 V 電流 A 1400 1800 鋼線徑 mm 2 2 先行極 電壓 V oo CO 電流 A 1800 2300 鋼線徑 mm S s 熔接 條件 〇 2 (請先閲讀背面之注意事項再填寫本頁) 訂 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） -48- 574380 A7 B7 五、發明説明f6 ) 經濟部智慧財4局工消費合作钍印製 ί i 化學成份（質量％) g 1 0.0040 •— 1 0.004 a s 2.11 0.35 u 0.04 鋼線 ----：---訂-----_ (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -49- 574380• mun · mn,? T 0Ψ. This paper size is applicable to the Chinese National Standard (CNS) A4 (210X297 mm) -47- 574380 A7 B7 V. Description of the Invention f5) The Intellectual Property Bureau, Ministry of Economic Affairs, the Consumer Cooperatives printed and prepared the test board 40mm thickness 60mm thickness Welding conditions | Input heat kJ / cm On v〇04 H CN Welding speed cm / min oo CSI Backward voltage V Current A 1400 1800 Steel wire diameter mm 2 2 Forward voltage V oo CO Current A 1800 2300 Steel wire diameter mm S s Welding conditions 〇2 (Please read the precautions on the back before filling this page) The size of the paper is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -48- 574380 A7 B7 V. Description of the invention f6) Printed ίi Chemical composition (mass%) g 1 0.0040 • — 1 0.004 as 2.11 0.35 u 0.04 Steel wire ----: --- Order --- --_ (Please read the notes on the back before filling out this page) This paper size is applicable to China National Standard (CNS) A4 specification (210X297 mm) -49- 574380

A B 五、發明説明严） 經濟部智慧財產局8工消費合作社印製 9 I概 1 比較例 本發明例 本發明例 比較例 本發明例 本發明例 本發明例 本發明例 本發明例 本發明例 比較例 比較例 本發明例 本發明例 化學組成（質量％) Nb* 種類:含有量 1 1 1 1 Fe-Nb:0.1 1 1 Fe-Nb:0.1 Fe-Nb:0.05 Nb 粉:0.05 Nb 粉j0.05 1 1 Fe-Nb:0.12 Mo* 種類:含有量 1 1 1 1 Mo粉:1·0 Μο粉:1·5 1 Fe-Mo:0.6 Fe-Mo:0.6 Fe-Mo:0.6 Fe-Mo:0.6 1 Fe-Mo:1.5 1 g* *氺 種類:含有量 B2〇3：0.03 Β2〇3:0·05 Β2〇3:0·05 B2〇3：0.05 Β2〇3：0.08 I Β2〇3:0·11 Β2〇3:0·06 B2〇3:0.06 Β2〇3:0·06 Β2〇3:0·06 Β2〇3:0·06 1 1 | f XH JjTE ul 衾驛 m wo >r^ CO CO CO CO 猛鐵:3 錳鐵:3 cn CO 寸 寸 _ m m m ϋ 鱺 鱺 纖 Μ m 鐵粉 種類:含有量 CO !' "H ώ 异· ul ώ ώ ώ ο < ο PQ s PQ CN CN c3 寸 寸 寸 寸 寸 寸 寸 寸 CO CO CO CO CO CO j^r*H VO v〇 ν〇 vo ο wo 寸 寸 寸 CO ON ON _ i oo r- 卜 寸 νο νο wn 寸 m wn CaC〇3 o r—i 〇 1 i Ο r—Η 〇 σ\ ON ON GN oo oo oo vo CN i—H csi t—H CN cn Csl 异 异 异 二 r- 二 vo 1 ' '< 异 〇νϊ oa 异 τ—Η VO ^-Η οα τ—Η <N r—H οα 1 i t-4 螋蘅z cs CO (X· 2 VO PU οο 〇 csi CO E 寸 El： _^<ΓΠ^κ-«戴螩^妳(* ------------^---1Τ-----I (請先閱讀背面之注意事項再填寫本頁) 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -50- 574380 A7 B7 五、發明説明f8 ) 表1 7 霧化鐵粉N 〇 . N含有量（質量％ ) A 0.0019 B 0.0 0 2 7 C 0.0 0 4 0 經濟部智慧財產局8工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁)AB 5. Strict description of the invention) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs 8 Printed by Industrial Cooperatives 9 I General 1 Comparative Example Inventive Example Inventive Example Comparative Example Inventive Example Inventive Example Inventive Example Inventive Example Inventive Example Inventive Example Comparative Example Comparative Example Inventive Example Inventive Example Chemical composition (mass%) Nb * Kind: Content 1 1 1 1 Fe-Nb: 0.1 1 1 Fe-Nb: 0.1 Fe-Nb: 0.05 Nb powder: 0.05 Nb powder j0 .05 1 1 Fe-Nb: 0.12 Mo * Species: Content 1 1 1 1 Mo powder: 1.0 Mol powder: 1.5 5 Fe-Mo: 0.6 Fe-Mo: 0.6 Fe-Mo: 0.6 Fe-Mo : 0.6 1 Fe-Mo: 1.5 1 g * * 氺 Type: Content B2〇3: 0.03 Β2〇3: 0 · 05 Β2〇3: 0 · 05 B2〇3: 0.05 Β2〇3: 0.08 I Β2〇3 : 0 · 11 Β2〇3: 0 · 06 B2〇3: 0.06 Β2〇3: 0 · 06 Β2〇3: 0 · 06 Β2〇3: 0 · 06 1 1 | f XH JjTE ul 衾 站 m wo > r ^ CO CO CO CO Fierce iron: 3 Ferromanganese: 3 cn CO Inch_ mmm ϋ 鲡 鲡 Fiber M m Type of iron powder: Content CO! '" H ώ Isolate · ul Free Royalty Free Free ο < ο PQ s PQ CN CN c3 inch inch inch inch inch inch inch CO CO CO CO CO CO CO j ^ r * H VO v〇ν〇vo ο wo inch inch CO ON ON _ i oo r-寸 inch νο νο wn inch m wn CaC〇3 or—i 〇1 i 〇 r—Η 〇σ \ ON ON GN oo oo oo vo CN i—H csi t—H CN cn Csl different different two r- two vo 1 '< ϊ〇νϊ oa ττ-Η VO ^ -Η οα τ-Η < N r-H οα 1 i t-4 螋 蘅 z cs CO (X · 2 VO PU οο 〇csi CO E inch El: _ ^ < ΓΠ ^ κ- «戴 螩 ^ 你 (* ------------ ^ --- 1Τ ----- I (Please read the notes on the back before filling in (This page) This paper size is in accordance with Chinese National Standard (CNS) A4 specification (210X297 mm) -50- 574380 A7 B7 V. Description of the invention f8) Table 1 7 Atomized iron powder N 〇 N content (% by mass) A 0.0019 B 0.0 0 2 7 C 0.0 0 4 0 Printed by the 8th Industrial Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page)

本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -51 - 574380 A7 B7 五、發明説明f9 ) 經濟部智慧財產局S工消費合作社印製 001 漱 備考 比較例 本發明例 本發明例 比較例 本發明例 本發明例 本發明例 本發明例 本發明例 本發明例 比較例 比較例 本發明例 本發明例 焊道外觀 融合不良 良好 良好 良好 良好 良好 良好 良好 良好 良好 良好 騷 玫從( ^ ίν $t 良好 良好 抗拉強度 TS (MPa) 〇〇 ON un CO § s Ο] Η VO … s un g \o VO VO un oo oo CO … ON U0 VD 韌性 is 心 CN 1' 1 i v〇 CO CO (N CO VO oo CN) oo C<l ON r—H ON Csl OO CN 熔接組合 熔接 條件 <υ <υ (D <υ <υ <+·Η ^+-4 焊劑 No d CO 21 Ph VO A oo Ph On |X| ο r—Η r—H r-H Uh CO 1—H |X| CO r—H (Xl 寸 r-H tin 鋼料 No. S s 鋼材 No. CO CO CO cn CO 寸 熔接接頭 No 1 CO csi 1 cn CO cA CO cA VO 1 CO rp CO oo 1 CO On CO Ο \ 4 cA r-H t—< 1 CO CM H 1 CO cn < < 1 CO 寸 cn I___：___________T----- (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -52- 574380This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -51-574380 A7 B7 V. Description of the invention f9) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, S Industrial Consumer Cooperative, 001 Preparation of Comparative Examples, Examples of the Invention, Examples of the Invention Examples Comparative Examples Inventive Examples Inventive Examples Inventive Examples Inventive Examples Inventive Examples Inventive Examples Comparative Examples Comparative Examples Inventive Examples Inventive Examples Weld Beads Poor Appearance Good ^ ν $ t Good tensile strength TS (MPa) 〇〇ON un CO § s Ο] Η VO… s un g \ o VO VO un oo oo CO… ON U0 VD toughness is heart CN 1 '1 iv〇CO CO (N CO VO oo CN) oo C < l ON r—H ON Csl OO CN Welding Combination Welding Conditions < υ < υ (D < υ < υ < + · Η ^ +-4 Flux No d CO 21 Ph VO A oo Ph On | X | ο r—Η r—H rH Uh CO 1—H | X | CO r—H (Xl inch rH tin steel No. S s steel No. CO CO CO cn CO Inch fusion splice No 1 CO csi 1 cn CO cA CO cA VO 1 CO rp CO oo 1 CO On CO 〇 \ 4 cA rH t— < 1 CO CM H 1 CO cn < < 1 CO inch cn I___: ___________ T ----- (Please read the precautions on the back before filling this page) This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 Mm) -52- 574380

A B7 五、發明説明) 經濟部智慧財產局員工消費合作社印製A B7 V. Description of the invention) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs

備考 比較例 本發明例 本發明例 比較例 本發明例 本發明例 本發明例 本發明例 本發明例 本發明例 比較例 比較例 本發明例 本發明例 ? S ^ _戀駟 啪裳1 g 逝留_ 16.3 10.0 12.7 17.2 cs ON 14.5 14.7 10.4 26.8 25.0 13.4 14.2 Έ Μ ^ 1 0.41 0.55 0.52 0.45 0.61 1 1.17 0.57 0.62 0.60 0.43 0.45 1 1 PQ 0.0009 0.0012 0.0012 0.0014 0.0019 1 0.0034 0.0017 0.0018 0.0021 0.0020 0.0019 1 1 • 1—4 1 曝 1 1 1 I 1 1 1 1 1 1 1 1 g 0.004 0.003 0.004 0.004 0.019 0.003 0.004 0.018 0.011 0.012 0.011 0.006 0.005 0.020 〇 1 1 1 1 1 0.28 0.48 1 0.19 0.20 0.18 0.17 1 0.49 1 2 0.0022 0.0022 0.0023 0.0031 0.0031 0.0033 0.0029 0.0030 0.0029 0.0035 0.0046 0.0042 0.0026 0.0027 •— 0.004 0.004 0.005 0.004 0.004 0.004 0.005 0.004 0.005 0.006 0.005 0.005 0.006 0.005 a S 1.29 CO f 1 — 1.56 1.62 1.32 CN CO .......4 1.33 1.77 1.64 1.76 1.59 1.34 1.30 0.47 0.49 0.30 0.31 0.39 0.41 0.40 0.32 0.30 0.31 0.29 0.31 0.44 -1 0.43 U 0.09 0.09 0.10 0.09 0.09 0.10 0.09 0.09 0.09 0.10 0.10 0.09 0.09 0.10 熔接 接頭 No <N 1 CO CO cA cn un 1 CO v〇 1 CO cA oo cn αν cA 3-10 1 i I 1 Η I cn 3-12 3-13 寸 r-H cA (請先閱讀背面之注意事項再填寫本頁) 、一--口 ΡΨ. 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -53-Remarks Comparative Examples Inventive Examples Inventive Examples Inventive Examples Inventive Examples Inventive Examples Inventive Examples Inventive Examples Inventive Examples Inventive Examples Comparative Inventive Examples Inventive Examples Inventive Examples S ^ _Love Reserved_ 16.3 10.0 12.7 17.2 cs ON 14.5 14.7 10.4 26.8 25.0 13.4 14.2 Έ Μ ^ 1 0.41 0.55 0.52 0.45 0.61 1 1.17 0.57 0.62 0.60 0.43 0.45 1 1 PQ 0.0009 0.0012 0.0012 0.0014 0.0019 1 0.0034 0.0017 0.0018 0.0021 0.0020 0.0019 1 1 • 1 —4 1 Exposure 1 1 1 I 1 1 1 1 1 1 1 1 g 0.004 0.003 0.004 0.004 0.019 0.003 0.004 0.018 0.011 0.012 0.011 0.006 0.005 0.020 〇1 1 1 1 1 0.28 0.48 1 0.19 0.20 0.18 0.17 1 0.49 1 2 0.0022 0.0022 0.0023 0.0031 0.0031 0.0033 0.0029 0.0030 0.0029 0.0035 0.0046 0.0042 0.0026 0.0027 • — 0.004 0.004 0.005 0.004 0.004 0.004 0.005 0.004 0.005 0.006 0.005 0.005 0.006 0.005 a S 1.29 CO f 1 — 1.56 1.62 1.32 CN CO ....... 4 1.33 1.77 1.64 1.76 1.59 1.34 1.30 0.47 0.49 0.30 0.31 0.39 0.41 0.40 0.32 0.30 0.31 0.29 0.31 0.44 -1 0.43 U 0.09 0.09 0.10 0.09 0.09 0 .10 0.09 0.09 0.09 0.10 0.10 0.09 0.09 0.10 Weld joint No < N 1 CO CO cA cn un 1 CO v〇1 CO cA oo cn αν cA 3-10 1 i I 1 Η I cn 3-12 3-13 inch rH cA (please read the precautions on the back before filling this page), 1-portion. This paper size is applicable to China National Standard (CNS) A4 (210X297 mm) -53-

Claims (1)

574380—— I : ί *Λ .Λ、 : Ί:Γ /b- ~1___— Γ 六、申請專利範圍 第901 23390號專利申請案 中文申請專利範圍修正本 (請先閲讀背面之注意事項再填寫本頁) 民國91年8月6日修正 1·一種潛弧熔接接頭，主要乃熔接輸入熱係有 1 5 0 k J / c m以上之有高熱量輸入之潛弧熔接接頭中 ，上述溶接接頭之溶接金屬成份乃以質量％而含有C: 0·03 〜0·15%，Si :〇·ΐ〇 〜i.oo%， Μη:0·70 〜2.50%，Ti :0.003 〜 0.0 3 0 %, N: 0 · 0050%以下且上述熔接金屬 中之粒界肥粒鐵生成量爲15.〇面積％以下爲其特徵者 〇 2 ·如申請專利範圍第1項所述之潛弧熔接接頭，其 中上述熔接金屬，更含有，以質量％而由Mo : 〇 . 1 〇 〜0.50%，Nb :0.010 〜0.200%，Ni 經濟部智慧財產局員工消費合作社印製 :0 · 0 5〜1 · 0 0%中所選取之一種或二種以上，且 〇· 60SB/NS1 . 20及上述熔接金屬中之粒界.肥 粒體生成量係可滿足1 0 · 0面積％以下者。 3 . —種潛弧熔接接頭之製造方法，主要乃藉由熔接 輸入熱係1 5 0 k J / c m以上之·高熱量輸入之潛弧熔接 法所熔接接合之潛弧熔接接頭之製造方法中，其特.徵爲： 上述熔接接頭之熔接金屬乃以質量％而含有， C:〇.〇3 〜0.15%，Si :〇.1〇 〜1.00 %，Μη:〇.7 〜2.50%, Ti :0.003 〜 本紙張尺度適用中國國家標準（CNS ) A4規格（ 210 X 297公釐） ： 574380 A8 B8 C8 D8 六、申請專利範圍 0 · 030%， N:〇· 0050%以下，且上述熔接金 屬中之粒界肥粒鐵生成量係1 5 . 0面積％以下者。 (請先閲讀背面之注意事項再填寫本頁) 4 ·如申請專利範圍第3項所述之潛弧熔接接頭之製 造方法，其中上述熔接金屬乃再以質量％而含有一種或二 種之由 Μο:〇·1 ◦〜0.50%， Nb:0.010 〜〇.2〇0%， Ni :〇·05〜1·〇〇%中所選取 之一種或二種以上，且0 · 60$B/N€1 · 20，及 上述熔接金屬中之粒界肥粒體生成量係可滿足1 〇 · 〇面 積％以下者。 5 種有高熱量輸入之潛弧熔接甩鋼線，具有，由 :以質量％而含有：C:0.03〜0·1〇%，N: 〇· 0035%以下，Si :0.40%以下，Μη: 1 · ◦0〜2 . 50%，再以能滿足含有Ti : 〇.〇3 0 %以上，且T i / N : 1 5〜5 0，剩餘部 F e及不可避免之不純物之鋼線組成，爲其特徵者。 經濟部智慧財產局員工消費合作社印製 6 .如申請專利範圍第5項所述之有高熱量輸入之潛 弧熔接用鋼線，其中上述鋼線組成中，再含有，以質量.％ 而由 Μο:〇·1〇 〜0.60%，Nb:0.010 〜 0·100%， Β:〇·〇〇〇 5 〜0.0100%, Ni :0.20〜2_ 0 0%中所選取之一樓或二種以上 者。 7 · —種具有優異之熔接金屬部韌性之潛弧熔接接頭 之製造方法，主要乃，藉由熔接入熱係1 5 0 k J / c m 以上之高熱量輸入之潛弧熔接所熔接接合之潛弧熔接接頭 本紙張尺度適用中國國家標準（CNS)A4規格（210X297公釐)" "" -2 - 574380 A8 B8 C8 D8 六、申請專利範圍 之製造方法中，其特徵爲： (請先閲讀背面之注意事項再填寫本頁) 將使用有丁丨含有量〇.〇〇6質量％以下，^]3含 有量爲0 · 0 1 2質量％以下之母材組成之鋼材，以質量 % 而含有 C :〇· 〇3 〜0 · 1 〇%, N : 〇 · 〇〇35 %以下，S i : 〇 · 40%以下，Mn : 1 · 〇〇 〜 2 . 50%,且再能滿足T. i : 〇 · 030%以上，且 T i/N : 1 5〜50%，剩餘部Fe及由不可避免之不 純物所成之組成之，有高熱量輸入之潛弧熔接用鋼線來熔 接爲特徵者。 8 ·如申請專利範圍第7項所述之潛弧熔接接頭之製 造方法，其中上述鋼線之組成乃再含有，以質量％而Μ 〇 :〇·10 〜0.60%，Nb:0.010 〜 〇·1〇〇%，B:〇.〇〇〇5 〜0.0100%, Ni : 〇 · 20〜2 · 00%中所選取之一種或二種以上 之有高熱量輸入之潛弧熔接用鋼線者。 經濟部智慧財產局員工消費合作社印製 9 ·如申請專利範圍第7項或第8項所述之潛弧熔接 接頭之製造方法，其中在於上述有高熱量潛弧熔接所使用 之熔接焊劑係含有硼氧化物之熔接焊劑者。 1 0 ·如申請專利範圍第9項所述之潛弧熔接接頭之 製造方法，其中以上述有高熱量輸入潛弧熔接所使用之熔 接焊劑乃以含有鐵粉以外之合金粉爲8質量％以下者。 1 1 ·如申請專利範圍第1 〇項所述之潛弧熔接接頭 之製造方法，其中上述熔接焊劑乃含有以質量％而含有N :0 ·〇〇30%以下之鐵粉之20〜45%者。 本紙張適用中國國家標準（CNS )八4祕（21〇><297公幻 -3- 574380 A8 B8 C8 D8 _ 六、申請專利範圍 (請先閱讀背面之注意事項再填寫本頁) 1 2 · 一種潛弧熔接用焊劑，其特徵爲：對於焊劑全 量地含有2 0〜4 5質量％地含有該N含有量係 〇.〇〇30%質量％以下之霧化鐵粉者。 1 3 .如申請專利範圍第1 2項所述之潛弧熔接用焊 劑，其中上述焊劑乃再含有B化合物，以B換算而對於焊 劑全量地含有〇 . 0 3〜0. · 3 0質量％者。 1 4 .如申請專利範圍第1 2項或第1 3項所述之潛 弧熔接用焊劑，其中上述焊劑乃再含有（A )群：Μ 〇粉 、鉬鐵粉及Μ 〇化合物粉中之一種或二種以上以Μ 〇換算 而共計對於焊劑全量而0 · 2〜2 · 0質量％， （ Β )群 :N b粉末，鈮鐵粉，及N b化合物粉中之一種或二種以 上以N b換算共計而對於焊劑全量而0 . 0 2〜0 · 1 5 質量％中所選取之一群或二群以上者。 5 .如申請專利範圍第1 2項或1 3項所述之潛弧 熔接用焊劑，其中上述焊劑乃對於焊劑全量地含有，以質 量％而，Si〇2:10〜28%， CaC〇3:5〜15 %, Mg 〇：15 〜38%, A 1 2 0 3 ： 3 〜20%, 經濟部智慧財產局員工消費合作社印製 丁 i〇2 ·· 2〜1 0 %， C a F 2 : 2〜：L 0 %，霧化鐵粉 ，Μ ◦粉，鉬鐵粉，N b粉，及鈮鐵粉以外之金屬粉：2 〜8 %中所選取之一種或二種以上者.。 1 6 .如申請專利範圍第1 2項或1 3項所述之潛弧 熔接用焊劑，其中上述焊劑係再含有：（A )群：Μ 〇粉 ，鉬鐵粉及Μ 〇化合物粉中之一種或二種以上以Μ 〇換算 而共計對於焊劑全量，而0 · 2〜2 · 0質量％， ( Β ) 本了紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） " ： " 574380 A8 B8 C8 D8 六、申請專利範圍 (請先閲讀背面之注意事項再填寫本頁) 群：N b粉，鈮鐵粉及N b化合物粉之中之一種或二種以 上，以N b換算而以共計而對於焊劑全量而含0 · 0 2〜 〇 · 1 5質量％，之中選取一群或二群以上，且對於焊劑 全量而含有以質量％而，以S i〇2 : 1 0〜2 8%， CaC〇3: 5 〜15%， Mg〇：15 〜38%， Al2〇3:3 〜20%, Ti〇2:2 〜10%, C a F 2 :2〜1 〇 %，霧化鐵粉，Μ 〇粉，鉬鐵粉，N b粉及鈮 鐵粉以外之金屬粉：2〜8 %中所選取之一種或二種以上 者。 1 7 . —種具有優異之熔接金屬部韌性之潛弧熔接接 頭之製造方法，主要乃熔接輸入熱係1 5 0 k J / c m以 上之有高熱量輸入之潛弧熔接法而予以熔接接合而成之潛 弧熔接接頭之製造方法中，其特徵爲： 經濟部智慧財產局員工消費合作社印製 對於具有Ti含有量係〇·006質量％以下，Nb 含有量係0 · 0 1 2質量％以下之母材組成之鋼材，而藉 由··以對於焊劑全量而N含有量：〇 · 〇 〇 3 0質量％以 下之霧化鐵粉而以質量％含有2 0〜4 5 %之焊劑組成之 焊劑來熔接者。 1 8 ·如申請專利範圍第1 7項所述之潛弧熔接接頭 之製造方法，其中上述焊劑組成乃再含有對於焊劑全量而 以B換算而含有〇 . 〇3〜0 · 3 0質量化合物者 〇 1 9 ·如申請專利範圍第1 7項或1 8項所述之潛弧 熔接接頭之製造方法，其中上述焊劑組成乃再含有（A ) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 574380 A8 B8 C8 _08 六、申請專利範圍 群：Μ 〇粉，鉬鐵粉及μ 〇化合物中之一種或二種，以 Μ 〇換算而共計對於焊劑全量而〇 . 2〜2 · 〇質量％， (請先閲讀背面之注意事項再填寫本頁) (Β )群：Ν b粉、鈮鐡粉及ν b化合物中之一種或二種 以上，以N b換算而對於焊劑全量〇 · 〇 2〜〇 · 1 5 % 之中所選取之一群或二群以上者。 2 0 ·如申請專利範圍第1 7項或1 8項所述之潛弧 熔接接頭之製造方法，其中上述焊劑組成乃，再含有對於 焊劑全量而以質量％而S i〇2 : 1 〇〜2 8 %， CaC〇3: 5 〜15%， Mg〇：15 〜38%， Α12〇3··3 〜20%， Ti〇2:2 〜10%， C a F 2 :2〜1 0 %，霧化鐵粉，Μ 〇粉，鉬鐵粉，N b粉及鈮 鐵粉以外之金屬粉：2〜8 %中所選取之一種或二種以上 者。 2 1 ·如申請專利範圍第1 7項或1 8項所述之潛弧 熔接接頭之製造方法，其中上述焊劑組成乃再含有：（A )群：Μ 〇粉，鉬鐵粉及Μ 〇化合物中之一種或二種以上 ，以Μ 〇換算共計對於焊劑全量而〇 . 2〜2 . 0質量％ 經濟部智慧財產局員工消費合作社印製 ,(Β )群：N b粉，鈮鐵粉或N b化合物中之一種或二 種以上以N b換算而共計對於焊劑全量而以〇 . 〇 2〜 〇· 1 5 % ,其中所選取之一群或二群以上，且對於焊劑 全量而含有以質量％而從S i〇2 : 1 〇〜2 8%, CaC〇3: 5 〜15%， Mg〇：15 〜38%， A 1 2 0 3 ： 3 〜20%， Ti〇2:2 〜10%; C a F 2 :2〜1 0 %，霧化鐵粉，Μ 〇粉，鉬鐵粉，N b粉或鉬 本紙旅尺度適用中國國家標準（CNS ) A4規格（210X297公釐） " ： '一^ 574380 A8 B8 C8 D8 「、申請專利範圍鐡粉以外之金屬粉2 8 %中所選取的一種或二種以上者 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）574380—— I: ί * Λ .Λ,: Ί: Γ / b- ~ 1 ___— Γ VI. Application for Patent Scope No. 901 23390 Patent Application Chinese Patent Amendment (Please read the notes on the back before filling in (This page) Amended on August 6, 1991 1. A submerged arc welding joint is mainly used for submerged arc welding joints with a high heat input of more than 150 k J / cm in the thermal system. The weld metal component contains C: 0.03 to 0.15%, Si: 〇.ΐ〇 to i.oo%, Μη: 0. 70 to 2.50%, Ti: 0.003 to 0.0 3 0% by mass%, N: 0 · 0050% or less and the amount of grain boundary ferrous iron in the above-mentioned welded metal is 15.0% by area or less is a feature of it 2 · The submerged arc welded joint described in item 1 of the patent application scope, wherein The above-mentioned weld metal further contains, by mass%, Mo: 〇. 1 〇 ~ 0.50%, Nb: 0.010 ~ 0.200%, printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs: 0 · 0 5 ~ 1 · 0 0 One or two or more selected in%, and 60 · 60SB / NS1. 20 and the grain boundary in the above-mentioned welded metal. The amount can satisfy 10% or less area%. 3. — A manufacturing method of submerged arc welding joints, which is mainly used in the manufacturing method of submerged arc welding joints welded by submerged arc welding with a high heat input of more than 150 kJ / cm and a high heat input. Its characteristics are as follows: The welding metal of the above welding joint is contained in mass%, C: 0.03 to 0.15%, Si: 0.1 to 1.0%, Mn: 0.7 to 2.50%, Ti : 0.003 ～ This paper size is applicable to China National Standard (CNS) A4 specification (210 X 297 mm): 574380 A8 B8 C8 D8 VI. Patent application scope 0 · 030%, N: 0 · 0050% and below the weld metal The amount of iron produced in the middle grain boundary is less than 15.0 area%. (Please read the precautions on the back before filling this page) 4 · The manufacturing method of the submerged arc welding joint described in item 3 of the scope of patent application, in which the above welding metal contains one or two reasons by mass% Μο: 〇.1 ◦ to 0.50%, Nb: 0.010 to 〇.200%, Ni: 0.05 to 1.00% or more, and 0. 60 $ B / N € 1.20, and the amount of grain boundary fat and granules produced in the above-mentioned welded metal can satisfy the area of less than 10.0% by area. 5 types of submerged arc fusion spun steel wires with high heat input, including: Contained by mass%: C: 0.03 ~ 0.10%, N: 0.0035% or less, Si: 0.40% or less, Mη: 1 · ◦0 ~ 2. 50%, and then it is composed of steel wire which can satisfy Ti: 0.30% or more, and T i / N: 1 5 ~ 50, the remaining part Fe and unavoidable impurities As its characteristics. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 6. The steel wire for submerged arc welding with high heat input as described in item 5 of the scope of the patent application, which is included in the above steel wire composition and is expressed in mass%. Μο: 〇 · １〇 ～ 0.60%, Nb: 0.010 ~ 0 · 100%, Β: 〇 · 〇〇〇〇5 ~ 0.0100%, Ni: 0.20 ~ 2_ 0 0% selected one or two or more . 7 · — A method for manufacturing a submerged arc welding joint with excellent toughness of the welded metal part, mainly by submerged arc welding with high heat input above 150 k J / cm Arc Welding Joints This paper is sized for the Chinese National Standard (CNS) A4 (210X297 mm) " " " -2-574380 A8 B8 C8 D8 6. In the manufacturing method for patent application, its characteristics are: (Please Read the precautions on the back before filling in this page) Steels with a content of less than 0.006% by mass and ^] 3 containing a base material with a content of 0 · 0 1 2% by mass or less will be used. %: C: 〇 · 〇3 ~ 0. 10%, N: 〇 · 〇〇35% or less, Si: 〇 · 40% or less, Mn: 1 · 〇〇 ~ 2.50%, and can Satisfying T.i: 〇.030% or more, and Ti / N: 15-50%, the remaining Fe and the composition of unavoidable impurities, submerged arc welding with high heat input is made of steel wire Characteristic welding. 8 · The manufacturing method of the submerged arc welding joint as described in item 7 of the scope of the patent application, wherein the composition of the steel wire is further contained, and the mass% is 〇: 〇 · 10 ~ 0.60%, Nb: 0.010 ~ 〇 · 100%, B: 0.005 ~ 0.0100%, Ni: 0.20 ~ 2. 00%, one or more steel wires for submerged arc welding with high heat input. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs9. The manufacturing method of submerged arc welding joints described in item 7 or 8 of the scope of patent application, wherein the welding flux used in the above-mentioned high-temperature submerged arc welding contains Boron oxide welding flux. 10 · The manufacturing method of the submerged arc welding joint described in item 9 of the scope of the patent application, wherein the welding flux used for the submerged arc welding with high heat input mentioned above is 8% by mass or less of alloy powder containing iron powder By. 1 1 · The method for manufacturing a submerged arc welding joint as described in item 10 of the scope of the patent application, wherein the above welding flux contains 20 to 45% of iron powder in mass% and containing N: 0. 〇30% or less By. This paper is applicable to Chinese National Standard (CNS) Eighty-fourth Secret (21〇 > < 297 公 幻 -3- 574380 A8 B8 C8 D8 _ VI. Scope of patent application (please read the precautions on the back before filling this page) 1 2 · A flux for submerged arc welding, characterized in that the total amount of the flux contains 20 to 45% by mass of the N atomized iron powder having a content of 0.030% by mass or less. 1 3 · The submerged arc welding flux as described in item 12 of the scope of the patent application, wherein the flux further contains a B compound, and in terms of B, the flux is contained in an amount of 0.3 to 0.3 mass%. 14. The flux for submerged arc welding according to item 12 or item 13 of the scope of the patent application, wherein the flux further contains (A) group: M o powder, molybdenum iron powder, and mo compound powder. One or two or more of the total amount of the flux in terms of M 0, totaling 0.2 to 2.0 mass%, (B) group: one or two or more of Nb powder, ferroniobium powder, and Nb compound powder One or two groups selected from the total amount of N b and total flux of 0.0 2 to 0 · 15% by mass 5. The submerged arc welding flux as described in item 12 or 13 of the scope of patent application, wherein the above flux is contained in the entire amount of the flux, and the content is SiO2: 10 ~ 28%, CaC〇3: 5 to 15%, Mg 〇: 15 to 38%, A 1 2 0 3: 3 to 20%, printed by the Consumers' Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs, and 2 ~ 10%, C a F 2: 2 ~: L 0%, atomized iron powder, M ◦ powder, iron molybdenum powder, N b powder, and metal powder other than ferroniobium powder: one or two selected from 2 to 8% The above: 16. The flux for submerged arc welding as described in item 12 or item 13 of the scope of patent application, wherein the above flux further contains: (A) group: Μ powder, molybdenum iron powder, and Μ 〇 One or two or more of the compound powders are converted to Μ 〇 to total the total amount of flux, and 0 · 2 ~ 2 · 0 mass%, (Β) the paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) ） &Quot; ： " 574380 A8 B8 C8 D8 6. Scope of patent application (please read the notes on the back before filling this page) Group: N b powder, ferroniobium powder and N b compound powder One or two or more of them are converted into N b in total and contained 0. 0 2 to 0. 15% by mass for the total amount of the flux. One or two or more are selected and the total amount of the flux is contained in Mass%: S i〇2: 10 to 28%, CaC03: 5 to 15%, Mg0: 15 to 38%, Al203: 3 to 20%, Ti〇2: 2 to 10 %, C a F 2: 2 ~ 10%, atomized iron powder, MO powder, molybdenum iron powder, Nb powder and metal powder other than ferroniobium powder: one or two selected from 2 to 8% The above. 17. — A method for manufacturing a submerged arc welding joint with excellent toughness of the welded metal part, mainly by submerged arc welding with a high heat input of more than 150 k J / cm and a fusion input. In the manufacturing method of Chengzhi submerged arc welding joint, it is characterized by: printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs with Ti content of 0.006 mass% or less, and Nb content of 0 · 0 1 2 mass% or less The base steel is composed of a steel material, and the content of N is: for the total amount of flux: 0. 〇3 0% by weight of atomized iron powder and 20% to 45% by weight of the flux composition Flux to weld. 1 8 · The method for manufacturing a submerged arc welding joint as described in item 17 of the scope of the patent application, wherein the flux composition described above further contains 0.003 ~ 0 · 30 mass compounds in terms of the total amount of the flux in terms of B. 〇1 9 · The manufacturing method of submerged arc welding joints as described in item 17 or item 18 of the scope of patent application, wherein the flux composition mentioned above further contains (A) This paper size is applicable to China National Standard (CNS) A4 specifications ( 210X297 mm) 574380 A8 B8 C8 _08 VI. Patent application group: one or two of 〇 powder, molybdenum iron powder and μ 〇 compound, converted to Μ 〇 and total for the total amount of flux and 0.2 ~ 2 · 〇 Mass%, (Please read the precautions on the back before filling this page) (B) Group: One or more of NB powder, niobium rhenium powder, and ν b compound, converted to N b for the total flux. 〇 · 〇2 ~ 〇 · 15% of the selected one or more groups. 20 · The method for manufacturing a submerged arc welding joint as described in item 17 or item 18 of the scope of the patent application, wherein the flux composition described above further comprises S i 2: 1 〇 ~ 28%, CaC〇3: 5 ~ 15%, Mg〇: 15 ~ 38%, Α12〇3 ·· 3 ~ 20%, Ti〇2: 2 ~ 10%, C a F 2: 2 ~ 10% , Atomized iron powder, MO powder, molybdenum iron powder, N b powder and metal powder other than ferroniobium powder: one or two or more selected from 2 to 8%. 2 1 · The method for manufacturing a submerged arc welding joint as described in item 17 or item 18 of the scope of the patent application, wherein the flux composition further contains: (A) group: M o powder, molybdenum iron powder, and mo compound One or two or more of them, converted into M 0, totaling the total amount of solder and 0.2 to 2.0% by mass. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, (B) group: N b powder, ferroniobium powder or One or two or more of the N b compounds are converted into N b in total and the total amount of the flux is 0.02 to 0.15%, of which one or two or more groups are selected, and the mass of the flux is contained in mass. % Si 2: 1 0 to 2 8%, CaC0 3: 5 to 15%, Mg 0: 15 to 38%, A 1 2 0 3: 3 to 20%, Ti 2: 2 to 10 %; C a F 2: 2 ~ 10%, atomized iron powder, Μ〇 powder, molybdenum iron powder, N b powder or molybdenum paper travel standard applicable to China National Standard (CNS) A4 specification (210X297 mm) " : "一 ^ 574380 A8 B8 C8 D8", one or two or more selected from 28% of metal powders outside the scope of patent application (please read the precautions on the back first) Refill this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper size applies to China National Standard (CNS) A4 (210X297 mm)
TW90123390A 2000-10-06 2001-09-21 Submerged-arc welding point with large heat input, method for producing the welding point, steel solder wire used by the method, and solder flux TW574380B (en)

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CN104400256A (en) * 2014-10-31 2015-03-11 天津市宏远钛铁有限公司 Low-hygroscopicity submerged-arc welding sintered flux and preparation method thereof
CN106695175A (en) * 2015-08-11 2017-05-24 江苏立新焊接材料有限公司 Method for infiltrating trace boron elements into weld metal and welding method
CN106513946A (en) * 2015-09-14 2017-03-22 江苏立新焊接材料有限公司 Method for seeping trace of boron into weld metal through electrode coating or flux core of flux-cored wire
CN105945448A (en) * 2016-05-20 2016-09-21 武汉铁锚焊接材料股份有限公司 Low-carbon medium-manganese high-silicon nickel alloy type submerged arc welding wire with high toughness and using method thereof
CN107984114B (en) * 2016-10-27 2020-10-27 鞍钢股份有限公司 Low-alloy high-strength high-toughness submerged arc welding wire suitable for high heat input welding
CN109454360A (en) * 2018-09-17 2019-03-12 昆山中冶宝钢焊接材料有限公司 A kind of SAW consumable material for double wire welding
CN109396613A (en) * 2018-11-16 2019-03-01 昆山中冶宝钢焊接材料有限公司 A kind of submerged arc welding flux and its welding procedure for double wire welding
CN110373523B (en) * 2019-07-16 2021-05-11 河钢股份有限公司承德分公司 Heat treatment softening method for steel for 90 kg-grade welding wire
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CN112404671B (en) * 2020-11-06 2022-09-06 李素坤 Solid welding wire for FCB (flux cored arc welding) method high heat input submerged arc welding and preparation method and application thereof
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CN1318180C (en) 2007-05-30
CN1616184A (en) 2005-05-18

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