JPH1043885A - Manufacture of steel wire for gas shielded arc welding and wire - Google Patents
Manufacture of steel wire for gas shielded arc welding and wireInfo
- Publication number
- JPH1043885A JPH1043885A JP20378796A JP20378796A JPH1043885A JP H1043885 A JPH1043885 A JP H1043885A JP 20378796 A JP20378796 A JP 20378796A JP 20378796 A JP20378796 A JP 20378796A JP H1043885 A JPH1043885 A JP H1043885A
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- Prior art keywords
- wire
- hydrogen
- amount
- steel wire
- arc welding
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は主としてＣＯ2 ある
いはＡｒ−ＣＯ2 混合ガスをシールドガスとして使用す
るガスシールドアーク溶接用鋼ワイヤの製造方法と鋼ワ
イヤに関し、詳しくは高張力鋼用ワイヤなど低水素な銅
めっき処理を施したワイヤの製造方法と耐われ性に優れ
た鋼ワイヤに係わるものである。The present invention relates primarily CO 2 or Ar-CO 2 production process and the steel wire gas shielded arc welding steel wire using a mixed gas as a shielding gas BACKGROUND OF THE INVENTION, in particular the low and high-tensile steel wire The present invention relates to a method for producing a wire subjected to a hydrogen copper plating treatment and a steel wire excellent in crack resistance.
【０００２】[0002]
【従来の技術】フラックス材料を使用しない鋼ワイヤ
は、フラックス入りワイヤ、被覆アーク溶接棒等に比べ
て、一般的に水素量が低レベルにあると言われている。
このため、拡散性水素に影響を受ける溶接部の割れが問
題となる高張力鋼の溶接では、耐われ性の観点から鋼ワ
イヤによるガスシールドアーク溶接法を採用する場合が
あった。2. Description of the Related Art It is generally said that a steel wire that does not use a flux material has a lower hydrogen content than a flux-cored wire, a coated arc welding rod, or the like.
For this reason, in the welding of high-tensile steel in which cracks in a welded portion affected by diffusible hydrogen are problematic, a gas shielded arc welding method using a steel wire may be adopted from the viewpoint of resistance.
【０００３】しかしながら、最近の構造物は高張力化、
厚板化の趨勢にあり、これに対応し得る、より低水素で
耐割れ性に優れた鋼ワイヤの要求は、大きい。このよう
な最近の要求を充分満足できる鋼ワイヤの製造条件とワ
イヤについて検討した。[0003] However, recent structures have been developed to have high tension,
There is a tendency for steel sheets to be made thicker, and there is a great demand for steel wires that can respond to this trend and have lower hydrogen and excellent crack resistance. The manufacturing conditions and wires for steel wires that can sufficiently satisfy such recent requirements were studied.
【０００４】従来の鋼ワイヤにおける水素量低減の検討
は、数例を数える程度であまりなされていない。例え
ば、特開昭５６−３００９１号公報では送給性、耐錆性
を向上させる目的で、実体ワイヤ表面にポリ四弗化エチ
レンテロマー被膜を形成したワイヤが示されており、拡
散性水素量を増加させないので高張力鋼の溶接に適用で
きるとしている。この技術も鋼ワイヤの水素量を積極的
に低減させるものでない。There have been few studies on the reduction of the amount of hydrogen in conventional steel wires, to the extent of only a few examples. For example, Japanese Patent Application Laid-Open No. 56-30091 discloses a wire in which a polytetrafluoroethylene telomer coating is formed on the surface of a real wire for the purpose of improving feedability and rust resistance. It is said that it can be applied to welding of high strength steel because it does not increase. This technique also does not actively reduce the amount of hydrogen in the steel wire.
【０００５】また同様に、特開昭５４−１２８９５４号
公報には、送給性、耐錆性等の向上を目的として、鋼ワ
イヤ表面に特定組成液を特定量付着させて成るソリッド
ワイヤは溶着金属の拡散性水素量を低減できるとする技
術であるが、この技術もまた鋼ワイヤの水素量を積極的
に低減させるものではない。[0005] Similarly, Japanese Patent Application Laid-Open No. 54-128954 discloses a solid wire formed by depositing a specific amount of a specific composition solution on the surface of a steel wire for the purpose of improving feedability and rust resistance. Although it is a technique capable of reducing the amount of diffusible hydrogen of a metal, this technique also does not actively reduce the amount of hydrogen in a steel wire.
【０００６】さらに、特公平３−２１０９９２号公報に
は、無めっきサブマージドアーク溶接用ワイヤ表面を脱
水素処理及びブルーイング処理することにより、ワイヤ
表面の発錆を抑えつつ溶接金属の拡散性水素量を低減す
るワイヤ表面処理方法が開示されている。この技術は、
無めっきワイヤを対象とするものであるので本発明の銅
めっきワイヤでは効果を発揮しない。Further, Japanese Patent Publication No. 3-2109992 discloses that the surface of a wire for non-plated submerged arc welding is subjected to a dehydrogenation treatment and a bluing treatment so that rust on the surface of the wire is suppressed while diffusible hydrogen of the weld metal is suppressed. A wire surface treatment method that reduces the amount is disclosed. This technology is
Since it is intended for a non-plated wire, the copper-plated wire of the present invention has no effect.
【０００７】銅めっき処理を施した鋼ワイヤに関して
は、特開昭５５−３０３４４号公報がある。この技術
は、原子炉構造物等の銅含有量の低減が好ましい溶接に
使用する、比較的薄い銅めっき処理でワイヤの耐蝕性、
送給性に優れた鋼ワイヤを目的として、ワイヤ表面に特
定の防錆油を特定量付着させたものである。しかし、こ
の技術も銅めっき処理ワイヤを対象にはするものの、ワ
イヤ自体の水素量を積極的に低減させるものではない。[0007] Japanese Patent Application Laid-Open No. 55-30344 discloses a copper wire-treated steel wire. This technology is used for welding where the reduction of copper content in nuclear reactor structures etc. is preferable.
A specific amount of a specific rust-preventive oil is attached to the surface of a wire for the purpose of a steel wire excellent in feeding property. However, although this technique also targets copper-plated wires, it does not actively reduce the amount of hydrogen in the wires themselves.
【０００８】また、特開昭５９−５０９９２号公報に
は、パルスＭＡＧ溶接におけるスパッタ低減を目的とし
て、Ｓｉ，Ｍｎ，Ｔｉ含有量範囲を規定し、Ｃ，Ｃｒ，
Ａｌ，ＲＥＭ，Ｎ，Ｏの上限を規制し、さらにＨ：５cc
／１００ｇ以下のワイヤが開示されている。この発明に
よる水素上限規制はワイヤ全体の水素量を規制すること
により、スパッタ発生量を抑制を意図するものである
が、銅めっきの存在を必須としていないので本発明の効
果は期待できない。Further, Japanese Patent Application Laid-Open No. 59-50992 specifies the content ranges of Si, Mn, and Ti for the purpose of reducing spatter in pulsed MAG welding.
The upper limits of Al, REM, N, and O are regulated.
/ 100 g or less wires are disclosed. Although the hydrogen upper limit regulation according to the present invention is intended to suppress the amount of spatter generated by regulating the amount of hydrogen in the entire wire, the effect of the present invention cannot be expected because copper plating is not essential.
【０００９】[0009]
【発明が解決しようとする課題】このように、従来技術
においては銅めっき処理を施した鋼ワイヤの水素量低減
の検討は殆どなされていないのが実状である。本発明者
らはこれらの実状に鑑み、鋼ワイヤの水素量を積極的に
低減する技術の検討を行った。まず、通常鋼ワイヤは溶
解、熱延、伸線の各工程を経て５mm径程度に加工され、
ワイヤ製造の各工程に原線として供される。この原線は
脱スケール処理工程、一次伸線工程、焼鈍工程、
めっき前処理工程、めっき工程、二次伸線工程、
仕上げ伸線工程、巻き取り工程の各工程を経て製品
に仕上げられる。これら一連工程の内、代表的工程での
水素レベルを測定した結果を表１に示す。As described above, in the prior art, there has been almost no study on the reduction of the hydrogen content of a steel wire subjected to a copper plating treatment. In view of these circumstances, the present inventors have studied techniques for positively reducing the amount of hydrogen in a steel wire. First, ordinary steel wire is processed to about 5 mm diameter through each process of melting, hot rolling, and wire drawing.
It is used as a base wire in each step of wire manufacturing. This wire is a descaling process, a primary wire drawing process, an annealing process,
Plating pretreatment process, plating process, secondary wire drawing process,
The product is finished through the final wire drawing process and the winding process. Table 1 shows the results of measuring the hydrogen level in typical steps in these series of steps.
【００１０】[0010]
【表１】 [Table 1]
【００１１】表１は、原線におけるワイヤの抽出水素量
を基準として、各工程のワイヤ抽出水素量との比で示し
ている。なお、鋼ワイヤの水素分析は、赤外燃焼ガスク
ロマトグラフィー法で行い、同一条件毎に採取した３サ
ンプルの平均抽出水素量で評価した。また、分析時に前
処理する場合は、ワイヤをトルエン浴中で約７分間の超
音波洗浄を行い、ワイヤ表面における付着物を除去し、
乾燥後分析に供した。一次伸線後の抽出水素量は原線の
３〜１５倍程度に増加し、焼鈍後も５倍程度以上のレベ
ルにある。これらは、めっき前処理によりほぼ原線レベ
ルまでに低下する。しかし、めっきにより抽出水素量は
原線の４倍程度にまで増加し、このレベルは製品におい
ても変わらない。Table 1 shows the ratio of the amount of hydrogen extracted from the wire in each step based on the amount of hydrogen extracted from the wire in the original wire. In addition, the hydrogen analysis of the steel wire was performed by the infrared combustion gas chromatography method, and the average extraction hydrogen amount of three samples collected under the same conditions was evaluated. When pre-treating at the time of analysis, the wire is subjected to ultrasonic cleaning in a toluene bath for about 7 minutes to remove deposits on the wire surface,
After drying, it was subjected to analysis. The amount of extracted hydrogen after primary drawing increases to about 3 to 15 times that of the original wire, and is about 5 times or more after annealing. These are reduced to almost the original line level by the plating pretreatment. However, the amount of hydrogen extracted by plating increases to about four times that of the original wire, and this level does not change in products.
【００１２】尚、製品ワイヤについて、表面を０．１mm
と０．２mm切削した後に抽出水素量を分析した結果、い
ずれの場合共に原線と同レベルの水素量となった。従っ
て、めっきにより増加した水素源は、めっき層を含むワ
イヤ表面から０．１mm以内のワイヤ表層部に存在するも
のである。The surface of the product wire is 0.1 mm.
As a result of analyzing the amount of extracted hydrogen after cutting 0.2 mm and 0.2 mm, the hydrogen amount was the same level as the original line in each case. Therefore, the hydrogen source increased by plating exists in the surface portion of the wire within 0.1 mm from the surface of the wire including the plating layer.
【００１３】通常の製品ワイヤはワイヤ送給時における
送給性を向上する目的でワイヤ表面に油脂類を塗布して
いる。このため、通常の製品ワイヤの総抽出水素量は表
１の製品のレベルよりさらに高くなっている。そこでワ
イヤの銅めっき層およびワイヤ最表面の水素源の存在位
置が溶接金属拡散性水素量に及ぼす影響を調査した。調
査ワイヤは、表１で行ったワイヤと同一の原線を使用
し、銅めっき前処理のまま伸線して仕上げたワイヤと通
常の銅めっき製品ワイヤ各々の表面に植物性潤滑油（パ
ーム油）の塗布量を変化したワイヤを準備して、拡散性
水素量を測定した。拡散性水素量の測定方法はＪＩＳＺ
３１１８に準拠したガスクロ法により行った。その結果
を表２に示す。[0013] In a normal product wire, fats and oils are applied to the surface of the wire for the purpose of improving the feeding property during wire feeding. For this reason, the total extracted hydrogen amount of the normal product wire is even higher than the product level in Table 1. Therefore, the effect of the location of the hydrogen source on the copper plating layer of the wire and the outermost surface of the wire on the amount of diffusible hydrogen in the weld metal was investigated. The same wire as the wire used in Table 1 was used as the survey wire, and the surface of each of the wire drawn and finished with the copper plating pretreatment and the normal copper plated product wire was coated with vegetable lubricating oil (palm oil). A wire having a varied amount of coating was prepared, and the amount of diffusible hydrogen was measured. The method for measuring the amount of diffusible hydrogen is JISZ
It was performed by a gas chromatography method based on 3118. Table 2 shows the results.
【００１４】[0014]
【表２】 [Table 2]
【００１５】表２から明らかなように、拡散性水素量に
影響を与えるのは、銅めっき層を含めた表層部に存在す
る水素で、ワイヤ表面に付着している油脂（表２ではパ
ーム油）に由来する水素源の影響は比較的小さい。これ
は、ワイヤ表面に塗布した油脂類は、溶接に際してワイ
ヤの抵抗発熱あるいは溶融金属の輻射熱やアーク輻射熱
等によりチップ先端からアーク先端に至るまでの短時間
で蒸発逸散して溶接金属には入り込まないものと思われ
る。一方、めっき層近傍の水素源はこのような短時間加
熱では殆ど逸散しなく、そのまま溶接金属拡散性水素源
となりうる。このように、めっき層近傍に存在するワイ
ヤ表層部水素の低下には新たな手段が必要であることが
判った。As is apparent from Table 2, what affects the amount of diffusible hydrogen is hydrogen existing in the surface layer including the copper plating layer, and the fats and oils adhering to the wire surface (palm oil in Table 2) ) Has a relatively small effect on the hydrogen source. This is because the oils and fats applied to the wire surface evaporate and dissipate in a short time from the tip end to the arc end due to the resistance heating of the wire or the radiant heat of the molten metal or the radiant heat of the arc during welding, and enter the weld metal. Seems not. On the other hand, the hydrogen source in the vicinity of the plating layer hardly dissipates by such a short-time heating, and can be used as a weld metal diffusible hydrogen source as it is. Thus, it has been found that a new means is necessary for reducing the hydrogen in the surface portion of the wire existing near the plating layer.
【００１６】[0016]
【課題を解決するための手段】本発明は、銅めっき製品
ワイヤにおいて増加した水素を軽減する鋼ワイヤの製造
方法を検討した結果なされたものである。すなわち本発
明は、銅めっき処理したワイヤに加熱温度３００℃以
上、加熱時間０．５Hr以上の非酸化性ガス雰囲気で加熱
処理を施すことを特徴とするガスシールドアーク溶接用
鋼ワイヤの製造方法である。また、加熱処理雰囲気ガス
がＡｒ，Ｎ2 ，ＣＯ2 の少なくとも１種であり、加熱温
度３００〜７００℃で加熱処理を行うことを推奨するガ
スシールドアーク溶接用鋼ワイヤの製造方法である。さ
らに、ワイヤ表層部に由来する抽出水素量が０．５ppm
以下であることを特徴とする銅めっき処理を施したガス
シールドアーク溶接用鋼ワイヤである。SUMMARY OF THE INVENTION The present invention has been made as a result of studying a method of manufacturing a steel wire for reducing the increased hydrogen in a copper-plated product wire. That is, the present invention provides a method for producing a steel wire for gas shielded arc welding, which comprises performing a heat treatment on a copper-plated wire in a non-oxidizing gas atmosphere having a heating temperature of 300 ° C. or more and a heating time of 0.5 Hr or more. is there. Further, this is a method for producing a steel wire for gas shielded arc welding in which the heat treatment atmosphere gas is at least one of Ar, N 2 , and CO 2 , and it is recommended to perform the heat treatment at a heating temperature of 300 to 700 ° C. Furthermore, the amount of hydrogen extracted from the surface layer of the wire is 0.5 ppm
It is a steel wire for gas shielded arc welding subjected to a copper plating process, characterized by the following.
【００１７】[0017]
【発明の実施の形態】銅めっき後および製品の表層部で
水素レベルが増加する主原因として、電気めっき時の
水素の侵入、めっき液のめっき層およびその素線の下
地部分への取込みが考えられる。従って、いずれの場合
にも水素を除去するには、加熱処理による手段が好まし
いと考えられる。そこで、より効果的に水素が低減でき
る熱処理条件の検討を行った。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The main causes of the increase in the hydrogen level after copper plating and at the surface layer of a product are considered to be intrusion of hydrogen during electroplating and incorporation of a plating solution into the plating layer and its underlying wire. Can be Therefore, in any case, it is considered that a means by heat treatment is preferable for removing hydrogen. Then, the heat treatment conditions which can reduce hydrogen more effectively were examined.
【００１８】線材としてＪＩＳＺ３３１２のＹＧＷ１２
系鋼塊（Ｃ＝０．０８％，Ｓｉ＝０．７８％，Ｍｎ＝
１．４５％）を使用して、前記の各製造工程を経て、
１．２mmφの銅めっきを施した製品に仕上げた。この製
品鋼ワイヤを雰囲気ガスを変えて、１００℃〜９００℃
の範囲の加熱温度と０．５〜２４Hrの加熱時間範囲の条
件で加熱処理した後、抽出水素量を測定し、水素低減効
果を検討した。尚、加熱温度までの昇温速度は約３００
℃／Hrに設定し、冷却は炉冷で行った。分析試料の前処
理は超音波洗浄を施した。抽出水素分析結果を表３およ
び図２に示す。As a wire, YGW12 of JISZ3312 is used.
Steel ingot (C = 0.08%, Si = 0.78%, Mn =
1.45%), through each of the above manufacturing steps,
The product was finished with a copper plating of 1.2 mmφ. Change the atmosphere gas of this product steel wire to 100 ℃ ～ 900 ℃
, And the amount of extracted hydrogen was measured, and the hydrogen reducing effect was examined. The heating rate up to the heating temperature is about 300
C./Hr was set, and cooling was performed by furnace cooling. Ultrasonic cleaning was performed for pretreatment of the analysis sample. The results of the extracted hydrogen analysis are shown in Table 3 and FIG.
【００１９】[0019]
【表３】 [Table 3]
【００２０】加熱温度が３００℃未満では、充分な水素
低減効果が得られない。この理由としては、めっき層お
よびめっき下の素地には微少な空隙が多数存在してお
り、その空隙に水素源が強固に捕捉されているためと考
えられる。If the heating temperature is lower than 300 ° C., a sufficient effect of reducing hydrogen cannot be obtained. It is considered that the reason for this is that many fine voids exist in the plating layer and the base material under the plating, and the hydrogen source is firmly captured in the voids.
【００２１】すなわち、めっき下の鋼ワイヤ表面には、
伸線加工等による微少な凹凸や粒界介在物や結晶粒界等
が存在している。このような鋼表面の微少な凹凸部ある
いは粒界には銅めっき層が形成され難く微少な空隙を形
成する場合が多い。また、これ以外にも、銅めっき層の
内部にも多少のめっき液の残存があることが認められ
た。このような部位に存在する水素源の形態は、分子状
水素あるいはめっき液として存在するため、低温度の加
熱や低時間の加熱では外部に十分に逸散しないものであ
る。That is, on the surface of the steel wire under plating,
Fine irregularities, grain boundary inclusions, crystal grain boundaries, and the like due to wire drawing are present. A copper plating layer is hardly formed at such minute uneven portions or grain boundaries on the steel surface, and minute voids are often formed. In addition, it was confirmed that some plating solution remained inside the copper plating layer. Since the form of the hydrogen source existing in such a portion exists as molecular hydrogen or a plating solution, it does not sufficiently escape to the outside by heating at a low temperature or for a short time.
【００２２】表２および図２に示すように抽出水素量
は、加熱温度３００℃、加熱時間０．５Hr以上の条件で
水素低減効果が認められ、１Hr以上では顕著に低減する
ことが分かった。しかし、Ａｒ，ＣＯ2 ，Ｎ2 の雰囲気
で８００℃以上の加熱温度では水素低減効果は、得られ
ず抽出水素量は増加する。これらの検討は、鋼ワイヤを
工業的に製造する際に使用するポット形の焼鈍炉を使用
したためである。このような焼鈍炉では充分に雰囲気の
気密が保持できないため、雰囲気中に空気が混入して銅
めっき層あるいは銅めっき下の鋼素地表面に水酸化物が
形成されたためである。As shown in Table 2 and FIG. 2, the amount of extracted hydrogen showed a hydrogen reducing effect when the heating temperature was 300 ° C. and the heating time was 0.5 Hr or more, and it was found that the amount of hydrogen was significantly reduced when the heating time was 1 Hr or more. However, at a heating temperature of 800 ° C. or more in an atmosphere of Ar, CO 2 , and N 2 , the hydrogen reduction effect cannot be obtained, and the amount of extracted hydrogen increases. These studies are based on the use of a pot-shaped annealing furnace used when industrially producing steel wires. This is because the airtightness of the atmosphere cannot be sufficiently maintained in such an annealing furnace, and air is mixed into the atmosphere to form hydroxide on the copper plating layer or the surface of the steel substrate under the copper plating.
【００２３】そこで、気密が十分に保持できる雰囲気制
御炉により雰囲気の酸素ポテンシャルを十分に管理して
行った場合には、８００℃以上の加熱温度でも酸化は発
生せず、水素の低減も十分であった。しかし、工業的に
経済的に製造を行う場合には、大型の制御雰囲気炉では
コスト高になるため、通常ワイヤの強度調整を行う焼鈍
炉を使用して、７００℃以下の温度でＡｒ，ＣＯ2 ，Ｎ
2 等の雰囲気ガスで行うことが推奨される。以下に本発
明の効果を具体的に詳述する。Therefore, when the oxygen potential of the atmosphere is sufficiently controlled by an atmosphere control furnace capable of sufficiently maintaining airtightness, oxidation does not occur even at a heating temperature of 800 ° C. or more, and the reduction of hydrogen is also sufficient. there were. However, when manufacturing industrially and economically, a large controlled atmosphere furnace increases the cost. Therefore, usually, an annealing furnace for adjusting the strength of the wire is used, and the temperature of Ar, CO is reduced to 700 ° C. or less. 2 , N
It is recommended to use an atmosphere gas such as 2 . Hereinafter, the effects of the present invention will be specifically described in detail.
【００２４】[0024]
【実施例】表４に示す化学成分のワイヤ径１．２mmφの
鋼ワイヤをＡｒガス雰囲気で加熱条件を変化させて、各
レベルの抽出水素量のワイヤを準備した。ワイヤ表層部
の抽出水素量は、製品鋼ワイヤ表面から０．１mm切削し
た前後の水素量の差から求めた。このワイヤを用い、表
５の溶接条件で、ＪＩＳＺ３１５８のｙ型溶接割れ試験
方法により、割れ性を評価した。鋼板は引張り強さが７
８０Ｎ／mm2 級鋼を用いた。図１の開先で予熱温度を変
化して１パス溶接部の耐割れ性を評価した。図に示す開
先の条件は、開先角度θ＝６０°、板厚Ｔ＝３０mm、開
先間隙Ｇ＝２mm、ルートフェイスＭ＝１５mm、試験片幅
Ｗ＝１５０mm、同長さＬ＝２００mmである。耐割れ性の
評価は割れ停止予熱温度で行った。尚、断面割れ率の調
査は、各条件５断面の断面マクロの光学顕微鏡( ×１０
０）で行った。この結果を表６に示す。EXAMPLE A steel wire having a chemical composition shown in Table 4 and a wire diameter of 1.2 mmφ was prepared by changing the heating conditions in an Ar gas atmosphere under various conditions. The amount of extracted hydrogen in the surface portion of the wire was determined from the difference in the amount of hydrogen before and after cutting 0.1 mm from the surface of the product steel wire. Using this wire, the cracking property was evaluated by the y-type welding crack test method of JISZ3158 under the welding conditions shown in Table 5. Steel plate has tensile strength of 7
80 N / mm 2 grade steel was used. The crack resistance of the one-pass weld was evaluated by changing the preheating temperature at the groove in FIG. The groove conditions shown in the figure are as follows: groove angle θ = 60 °, plate thickness T = 30 mm, groove gap G = 2 mm, root face M = 15 mm, specimen width W = 150 mm, and length L = 200 mm. is there. The evaluation of the crack resistance was performed at the crack stop preheating temperature. In addition, the cross section crack rate was investigated by using an optical microscope (× 10
0). Table 6 shows the results.
【００２５】[0025]
【表４】 [Table 4]
【００２６】[0026]
【表５】 [Table 5]
【００２７】[0027]
【表６】 [Table 6]
【００２８】Ｎｏ．２１，Ｎｏ．２２およびＮｏ．２５
は、加熱条件が本発明の範囲未満であるため、水素が低
減せず、１００℃の予熱温度でも割れが発生した。Ｎ
ｏ．２３，Ｎｏ．２４は、加熱条件が、本発明の範囲を
超えたたため、水素が増加し、１００℃の予熱温度でも
割れが発生した。また、Ｎｏ．２６は全く加熱処理を行
っていないために、水素量は高く、割れが発生する。一
方、本発明の範囲の加熱条件で加熱処理した各ワイヤ
は、水素量も大幅に低減し、予熱温度１００℃以下の条
件でも割れの発生は全く認められなかった。No. 21, No. 22 and No. 25
Since the heating conditions were below the range of the present invention, hydrogen did not decrease and cracks occurred even at a preheating temperature of 100 ° C. N
o. 23, no. In No. 24, since the heating conditions exceeded the range of the present invention, the amount of hydrogen increased and cracks occurred even at a preheating temperature of 100 ° C. In addition, No. In No. 26, since no heat treatment was performed, the amount of hydrogen was high and cracks occurred. On the other hand, in each of the wires heat-treated under the heating conditions in the range of the present invention, the amount of hydrogen was also significantly reduced, and no crack was observed even at a preheating temperature of 100 ° C. or lower.
【００２９】[0029]
【発明の効果】以上のように、本発明のワイヤの製造方
法においては、適度な加熱処理条件によって、銅めっき
層近傍の水素量を低減でき、耐割れ性を大幅に改善する
ことが可能となった。As described above, in the wire manufacturing method of the present invention, the amount of hydrogen in the vicinity of the copper plating layer can be reduced and the crack resistance can be significantly improved by appropriate heat treatment conditions. became.
【図１】割れ試験片の形状を示す図である。FIG. 1 is a diagram showing the shape of a crack test piece.
【図２】加熱温度と加熱時間の水素低減率に及ぼす影響
を示す図である。FIG. 2 is a diagram showing the effect of heating temperature and heating time on the hydrogen reduction rate.
フロントページの続き (72)発明者 加藤 剛 東京都中央区築地三丁目５番４号 日鐵溶 接工業株式会社研究所内Continued on the front page (72) Inventor Tsuyoshi Kato 3-5-4 Tsukiji, Chuo-ku, Tokyo Nippon Steel Welding Industry Co., Ltd.
Claims (3)
０℃以上℃、加熱時間０．５Hr以上の非酸化性ガス雰囲
気で加熱処理を施すことを特徴とするガスシールドアー
ク溶接用鋼ワイヤの製造方法。1. A heating method for heating a copper-plated wire at a heating temperature of 30 ° C.
A method for producing a steel wire for gas shielded arc welding, wherein a heat treatment is performed in a non-oxidizing gas atmosphere having a temperature of 0 ° C. or more and a heating time of 0.5 hour or more.
2 の少なくとも１種であり、加熱温度３００〜７００℃
で加熱処理を行うことを特徴とする請求項１記載のガス
シールドアーク溶接用鋼ワイヤの製造方法。2. The heat treatment atmosphere gas is Ar, N 2 , CO
2 , heating temperature of 300 to 700 ° C.
The method for producing a steel wire for gas shielded arc welding according to claim 1, wherein the heat treatment is performed.
０．５ppm 以下であることを特徴とする銅めっき処理を
施したガスシールドアーク溶接用鋼ワイヤ。3. A steel wire for gas shielded arc welding subjected to a copper plating process, wherein an amount of hydrogen extracted from a surface portion of the wire is 0.5 ppm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20378796A JPH1043885A (en) | 1996-08-01 | 1996-08-01 | Manufacture of steel wire for gas shielded arc welding and wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20378796A JPH1043885A (en) | 1996-08-01 | 1996-08-01 | Manufacture of steel wire for gas shielded arc welding and wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1043885A true JPH1043885A (en) | 1998-02-17 |
Family
ID=16479757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20378796A Pending JPH1043885A (en) | 1996-08-01 | 1996-08-01 | Manufacture of steel wire for gas shielded arc welding and wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1043885A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3225349A4 (en) * | 2014-11-27 | 2018-05-30 | Baoshan Iron & Steel Co., Ltd. | Super high strength gas protection welding wire containing v and manufacturing method therefor |
-
1996
- 1996-08-01 JP JP20378796A patent/JPH1043885A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3225349A4 (en) * | 2014-11-27 | 2018-05-30 | Baoshan Iron & Steel Co., Ltd. | Super high strength gas protection welding wire containing v and manufacturing method therefor |
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