JPS5916694A - Flux cored wire for welding and its production - Google Patents

Abstract

PURPOSE:To produce a flux cored wire having a good welding condition in the flux cored welding wire wherein a welding flux is packed in a small diameter steel pipe welded at a seam and the pipe is heat treated and drawn by regulating specifically the sectional shape of the wire and the tensile strength of the sheath steel pipe. CONSTITUTION:A flux is packed in a drawn steel or electric welded steel pipe and is drawn, whereby a flux cored welding wire is produced. The pipe is subjected to at least one time of heat treatment during the production by drawing in this case and after the final heat treatment, the pipe is subjected to drawing at (130-60D)-97% (D: the final diameter of the wire mm.) reduction of area. The welding wire which is the product is regulated to 1-2mm. diameter (D) and 0.15<= t/D<=0.35 relation between the diameter D and the thickness (t) of the sheath steel pipe and to T=70/sq. rt. D-100kgf/mm.<2> tensile strength of the sheath steel pipe. The weld zone having excellent material quality is formed without the intrusion of water, etc. through the joint of the sheath into the flux.

Description

【発明の詳細な説明】 本発明は溶接状態の良好な溶接用フラックス人シワイヤ
とその製造方法に係る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a welding flux shear wire with good welding conditions and a method for manufacturing the same.

溶接用フラックス人シワイヤは、脱酸剤、スラグ形成剤
等から成る粉粒状フラックスを外皮鋼管内に充填した複
合構造のワイヤでアシ、軟鋼から低合金鋼、高合金鋼等
の溶接まで広い用途に用いられている。この溶接用フラ
ックス入シワイヤは、大別して２種類６．Ｄ、その１つ
は薄鋼板の帯鋼をＵ形に成形した後、所定の成分調整を
行なった粉粒状の溶接用フラックスを一様に充填し、所
定の断面形状に成形した後、伸線加工する方法によシ製
造されるフラックス入シワイヤである。このワイヤは合
せ目を有するため、種々の欠点を有する。Flux wire for welding is a wire with a composite structure in which the outer steel pipe is filled with powdery flux consisting of a deoxidizing agent, a slag forming agent, etc., and can be used for a wide range of applications from welding of reeds, mild steel, low alloy steel, high alloy steel, etc. It is used. This flux-cored shear wire for welding is roughly divided into two types6. D. One method is to form a thin steel strip into a U shape, then uniformly fill it with granular welding flux with a predetermined composition adjustment, form it into a predetermined cross-sectional shape, and then wire-draw it. This is a flux-cored shear wire manufactured by a processing method. Since this wire has seams, it has various disadvantages.

すなわち、該合せ目が開口し易く、開口部よシワイヤ外
面の水分又は製造工程中に使用される潤滑剤などの有機
物質が外皮鋼管内のフラックス中に侵入する。このよう
なワイヤを使用して溶接した場合、溶接金属中の拡散性
水素を増加させたシ、ワイヤ内面の外皮壁面の酸化を促
進させ溶接金属中の酸素を増加させて、溶接部の機械的
性能の劣化を招くことになる。又合せ目な廟するので、
めっき処理ができずこのため耐錆性に劣る。That is, the seams are likely to open, and moisture on the outer surface of the shear wire or organic substances such as lubricants used during the manufacturing process can enter the flux inside the sheathed steel pipe through the openings. When welding using such a wire, it increases the diffusible hydrogen in the weld metal, promotes oxidation of the inner skin wall of the wire, increases oxygen in the weld metal, and reduces the mechanical strength of the weld. This will lead to performance deterioration. It is also a joint temple, so
It cannot be plated and therefore has poor rust resistance.

他の１つは特公昭４５〜３０９３７号公報及び特公昭５
１．−４５５４４号公報等に記載の継ぎ目なし鋼管又は
電縫管のようにシームドされた鋼管にフラックスを充填
した合せ目のない溶接用ワイヤである。The other one is Special Publication No. 45-30937 and Special Publication No. 5
1. This is a seamless welding wire made by filling a seamed steel pipe such as a seamless steel pipe or an electric resistance welded pipe with flux, as described in Japanese Patent No. 45544.

この溶接用フラックス人シワイヤは、実体ワイヤにおい
て含有していないスラグ生成剤、アーク安定剤などを任
意に添加でき、さらに外皮である鋼管が同一成分であっ
ても充填フラックス中に合金剤及び脱酸剤を適量添加す
ることによって各グレードに適合した溶接用ワイヤの製
造が可能であ遵、多品種少量の生産にも適する。さらに
合せ目らりのフラックス人シワイヤの欠点であった耐錆
性も銅めっき等の表面処理被膜を施すことができ解消で
き、合せ目を有しないため充填フラックスの吸湿が起こ
らず、溶接金属の拡散性水素が実体ワイヤと同程度に少
なくすることができるので品質良好な溶接部が得られる
。This flux shear wire for welding can optionally add slag forming agents, arc stabilizers, etc. that are not contained in the actual wire, and even if the steel pipe that is the outer skin has the same composition, alloying agents and deoxidizing agents can be added to the filling flux. By adding an appropriate amount of the agent, it is possible to manufacture welding wires suitable for each grade, making it suitable for high-mix, low-volume production. In addition, the rust resistance, which was a drawback of flux shear wire with seams, can be overcome by applying a surface treatment film such as copper plating, and since there is no seam, the filling flux does not absorb moisture, and the weld metal Since the amount of diffusible hydrogen can be reduced to the same level as that of a real wire, a welded part with good quality can be obtained.

本発明の目的は上記のようなワイヤ長手方向の開口部す
なわち合せ目のない溶接用フラックス人シワイヤにおい
て、そのワイヤ断面形状と外皮鋼管の引張強さを規定す
ることにより、良好な溶接状態が得られる溶接用フラッ
クス人シワイヤおよびその製造方法を提供すること［６
る。この目的を達成する本発明は、 （１）合せ目を溶接した溶接鋼管に溶接フラックスを充
填したワイヤ径りがＤ　＝　１．、０〜２．　Ｑ　ｍｍ
の細径溶接用フラックス人シワイヤであって、外皮厚ｔ
とワイヤ径りが０１１５イｔ／Ｄ　、ｆｆ　０．３５で
あること、および外皮の引張強さＴがＴ　＝　７０／Ｊ
ｒ５〜１００ｋｇｆ　／　＋＋＋＋＋ｔであることを特
徴とする溶接用フラックス入シワイヤ。The object of the present invention is to provide a flux shear wire for welding without an opening in the longitudinal direction of the wire, that is, a seam, by specifying the cross-sectional shape of the wire and the tensile strength of the outer steel pipe, thereby achieving a good welding condition. To provide a flux shear wire for welding and a method for producing the same [6]
Ru. The present invention achieves this object by: (1) A wire diameter of a welded steel pipe filled with welding flux D = 1. , 0-2. Q mm
A flux shear wire for small diameter welding with an outer skin thickness t
The wire diameter is 0115t/D, ff is 0.35, and the tensile strength T of the outer skin is T = 70/J.
A flux-cored shear wire for welding, characterized in that it has a r5 to 100 kgf/++++t.

（２）　　合せ目を溶接した溶接鋼管に溶接フラックス
を充填し、伸線加工を行なって溶接用フラックス入シワ
イヤを製造する［６たシ、製造工程の途中で少なくとも
１度の熱処理を行ない、最終熱処理以降ｖｃｆ）イヤ減
面率（１３０−６０Ｄ）　〜９７％（Ｄ＝最終ワイヤ径
龍）の伸線加工を施すことを特徴とする溶接用フラック
ス人シワイヤの製造方法。(2) A welded steel pipe with welded seams is filled with welding flux and wire drawn to produce a flux-cored shear wire for welding. A method for manufacturing a flux shear wire for welding, characterized in that after heat treatment, a wire drawing process is performed with a reduction in area (vcf) of 130-60D to 97% (D = final wire diameter).

である。It is.

以下本発明の内容を詳細に説明する。The contents of the present invention will be explained in detail below.

本発明の溶接用フラックスは合せ目を溶接した溶接鋼管
中に溶接フラックスを充填した後、所要サイズに伸線し
て得られるフラックス入クワイヤであって、外皮部分に
ワイヤ長手方向の合せ目カニなく合せ目をもつ従来ワイ
ヤの欠点を除去したものである。鋼管中にフラックスを
充填する手段については、引抜鋼管又は高周波溶接、Ｔ
ＩＧ溶接等による電縫管にフラックスを充填してもより
・し、フラックスを充填しながら上記溶接法によシ溶接
管に仕上げてもよい。The welding flux of the present invention is a flux-cored wire obtained by filling welding flux into a welded steel pipe with welded seams and then drawing the wire to the required size, and there is no seam crab in the longitudinal direction of the wire in the outer skin part. This eliminates the drawbacks of conventional wires that have seams. As for the means of filling flux into steel pipes, drawn steel pipes, high frequency welding, T
An electric resistance welded tube by IG welding or the like may be filled with flux or twisted, and a welded tube may be finished by the above-mentioned welding method while being filled with flux.

なお、本発明ワイヤに充填するフラックスとしては第１
表に示すようにチタニア系、ライム系、ライムチタニア
系等の各種の充填フラックスカー適用可能である。Incidentally, the flux to be filled into the wire of the present invention is the first one.
As shown in the table, various filling flux cars such as titania type, lime type, lime titania type, etc. can be applied.

第１表　充填フラックス組成剤 次にワイヤの外皮厚さについては、外皮厚さが薄すぎて
は線引時に外皮が硬化し生産性が低下すること、さらに
ワイヤが硬いためワイヤ送給性が不良で、著しい場合は
コンジットケーブル内で折損するなどの問題点が生ずる
。一方、外皮厚さが厚すぎる場合は線引性は良好である
が、ワイヤ内部に溶接用フラックスを十分な量だけ充填
するこ　６− とができず、フラックス人シワイヤとしての溶接作業性
に問題が生ずる。Table 1: Filling flux composition Next, regarding the thickness of the wire sheath, if the sheath thickness is too thin, the sheath will harden during drawing, reducing productivity, and the wire will be hard, resulting in poor wire feedability. In severe cases, problems such as breakage within the conduit cable may occur. On the other hand, if the outer skin is too thick, the drawability is good, but it is not possible to fill the inside of the wire with a sufficient amount of welding flux, which causes problems in welding workability as a flux shear wire. occurs.

そこで本発明者等は外皮厚さの適正範囲を実験によシ求
めた。第１図はワイヤ径Ｄ　＝　１．０〜２０ｍｍの細
径の溶接用フラックス人シワイヤの外皮厚ｔとワイヤ径
りとの比ｔ／Ｄと充填率（フシックス重量／フラックス
重量＋外皮鋼管重量）ｑ（％）の関係をフラックス密度
ρｆ（ｇ／ｃｒｆｔ３）をパラメータとして表わしたも
のである。ρ、はフラックスの組成と充填後の伸線に伴
う加圧の強さによって変動するが、第１図に表わしたρ
、−２〜５　ｇ／（ＭｒＬ３の範囲内［６るのが通常で
ある。第１図によシ明らかなようｇｔ／Ｄが０．１５に
満たないと外皮厚が薄くな勺、これによシワイヤの強度
を外皮鋼管部で保持させていることから、伸線工程中に
断線が多発して生産性を多大に阻害する。更に製品とし
てスプールに巻く工程で折損が生じたシ、溶接時におい
てワイヤ送給途上で断線が生じ易く製品として問題が多
い。Therefore, the present inventors determined the appropriate range of the outer skin thickness through experiments. Figure 1 shows the ratio t/D of the outer skin thickness t of a thin flux shear wire for welding with a wire diameter D = 1.0 to 20 mm and the wire diameter, and the filling rate (flux weight/flux weight + outer steel pipe weight) q (%) is expressed using flux density ρf (g/crft3) as a parameter. ρ varies depending on the flux composition and the strength of pressure during wire drawing after filling, but ρ shown in Figure 1
, -2 to 5 g/(MrL3) [6] is normal. Since the strength of the wire is maintained in the outer steel pipe, wire breakage occurs frequently during the wire drawing process, greatly hindering productivity.Furthermore, wire breakage occurs during the process of winding it onto a spool as a product, and during welding. In this case, wire breakage tends to occur during wire feeding, which poses many problems as a product.

一方、ｔ　／　Ｄが０．３５を超えると第１図から明ら
　７− かなようにρ、が大きい５に於ても充填率ｑが６％以上
にならず、このためフラックス中に必要な脱酸剤やスラ
グ形成剤の量が不足して、本来の溶接用フラックス入り
ワイヤの溶接上の性能を発揮することができない。すな
わち溶接用フラックス人シワイヤの外皮厚ｔとワイヤ径
りの比率は、０．１５〜０，３５の範囲が製造上の面か
ら、製品使用上（ワイヤ送給性、溶接作業性）の面から
みて好ましい。On the other hand, when t/D exceeds 0.35, it is clear from Figure 1 that even when ρ is large, the filling factor q does not exceed 6%, and therefore the Due to the insufficient amount of deoxidizing agent and slag forming agent, the original welding performance of the flux-cored wire for welding cannot be exhibited. In other words, the ratio of the outer skin thickness t of the welding flux shear wire to the wire diameter should be in the range of 0.15 to 0.35 from the viewpoint of manufacturing and product use (wire feedability, welding workability). I like it.

本発明の対象としているワイヤの外径は、１．０〜２．
　Ｏｍｍと溶接用フラックス入りワイヤ径としては細径
の部類に属する。このことはワイヤ自体の剛性をある値
以上に保たなければ、溶接時のワイヤ送給に６たってワ
イヤに座屈現象が生じ、溶接用ワイヤとしての用をなし
得ない。そこで本発明者等はワイヤの剛性を外皮鋼管部
の引張強さで代表させて、ワイヤ径との関係で良好な範
囲があることを何列の結果つきとめた。The outer diameter of the wire targeted by the present invention is 1.0 to 2.
Omm, it belongs to the small diameter category as a flux-cored wire diameter for welding. This means that unless the rigidity of the wire itself is maintained above a certain value, a buckling phenomenon will occur in the wire when the wire is fed during welding, making it useless as a welding wire. Therefore, the present inventors represented the stiffness of the wire by the tensile strength of the outer steel pipe, and found that there is a good range in relation to the wire diameter.

すなわち外皮鋼管部の引張強さＴが７０／Ｖ５−に９ｆ
　／ｍ４　ｖｃ満たないと溶接時にワイヤの座屈現象が
　８− 生じる。また１　００　ｋｇｆ　／ｍｙ７を超えると、
延性が極端に低下して製造時において伸線工程中の断線
や溶接時のワイヤ折損が生じ易く、問題となるので外皮
鋼管部の引張強さＴは７０　／ＪＴｉ　〜１００　ｋｇ
ｆ／ｍａが好ましい。In other words, the tensile strength T of the outer skin steel pipe section is 9f to 70/V5-.
/m4 VC, wire buckling occurs during welding. Also, if it exceeds 100 kgf/my7,
The tensile strength T of the outer steel pipe is set at 70/JTi ~ 100 kg because the ductility is extremely reduced and wire breakage during the wire drawing process or wire breakage during welding is a problem during manufacturing.
f/ma is preferred.

第２表はワイヤ径Ｄ　＝　１．２　ｍｍ、外皮厚ｔとワ
イヤ径りの比ｔ／Ｄ＝０．２４とし、チタニア系フラン
クスを充填率１２％で充填したワイヤを用い板厚１２、
５　ｍｍのＪＩＳＧ−３１１４，ＳＭＡ−５０Ｂ鋼板に
溶接電流２８０Ａ、溶接電圧３０Ｖ、溶接速度３０ｃｒ
／Ｌ／　ｍｉｎ、シールドガスＣＯ２２０１３／ｍｉｎ
の溶接条件で下向溶接を行なった実験結果でるる。外皮
の引張強さは、ワイヤ製造工程中において最終熱処理以
降のワイヤ減面率を変えて伸線加工を施こすことによシ
変化させた。第２表かられかるようにワイヤ外皮の引張
強さＴはＤ　＝　１．２７ｆｆｍの場合、６４ｋｇｆ／
　ｍａ　（−７ｏ／、／”Ｎ　）から１００ｋｇｆ／−
の範囲が良好で、６４ｋｇｆ／−未満ではワイヤ送給に
際して、コンジットケーブル内等でワイヤが座屈し易く
ワイヤ送給性、溶接作業性ともに劣っていた。一方、　
９− 外皮の引張強さが１００　ｋｇｆ　／ｍｒｊを超えると
ワイヤの製造時、伸線加工中に断線したシ、溶接時、ワ
イヤ送給中にワイヤに折損カ生じ易く、ワイヤ送給性、
溶接作業性ともに劣っていた。なおワイヤ送給性は送給
モータ電機子電流を測定し、該電流の大小で、良、不良
を判定した。Table 2 shows wire diameter D = 1.2 mm, ratio of outer skin thickness t to wire diameter t/D = 0.24, wire filled with titania Franks at a filling rate of 12%, plate thickness 12,
Welding current 280A, welding voltage 30V, welding speed 30cr on 5 mm JISG-3114, SMA-50B steel plate.
/L/min, shield gas CO22013/min
Here are the experimental results of downward welding under the following welding conditions. The tensile strength of the outer skin was changed by drawing the wire by changing the area reduction rate of the wire after the final heat treatment during the wire manufacturing process. As shown in Table 2, the tensile strength T of the wire sheath is 64 kgf/ when D = 1.27 ffm.
ma (-7o/, /”N) to 100kgf/-
The range was good, and when it was less than 64 kgf/-, the wire was likely to buckle inside the conduit cable when feeding the wire, resulting in poor wire feeding performance and welding workability. on the other hand,
9- If the tensile strength of the outer sheath exceeds 100 kgf/mrj, the wire is likely to break during wire manufacturing, wire drawing, and breakage during welding or wire feeding, resulting in poor wire feedability.
Both welding workability was poor. The wire feedability was determined by measuring the feed motor armature current, and judging whether the wire was good or bad was determined based on the magnitude of the current.

１０− 第２表 （注）　◎良好　△や＼不良　Ｘ不良 次に、本発明のワイヤでは外皮に合せ目がないので、ワ
イヤ表面に金属めっきを施すことが可能である。金属め
っきとは、銅、ニッケル、マンガン、アルミニウムなど
の金属めっきを指すものであり、めっき後の線引加工が
容易となる他、溶接時の給電性、通電性が良好で、保存
時の耐錆性にも優れている。即ち、従来のフラックス人
シワイヤでは前述の通シ、外皮に合せ目をもっておシ、
したがってソリッドワイヤの様にワイヤ表面に銅などの
金属表面被膜を施すことはできなかった。10- Table 2 (Note) ◎Good △ or ＼Poor Metal plating refers to metal plating of copper, nickel, manganese, aluminum, etc., and it not only facilitates wire drawing after plating, but also has good power supply and conductivity during welding, and has good durability during storage. It also has excellent rust resistance. That is, in the conventional flux shear wire, the above-mentioned through-sheath, seam seam on the outer sheath,
Therefore, unlike solid wires, it was not possible to coat the wire surface with a metal surface coating such as copper.

これは化学めっき又は電気めっきのいずれであってもめ
つき溶液中にワイヤを浸漬してめっきを行うためにめっ
き溶液が開口した合せ目からフラックス中に侵入するか
らで６Ｄ、したがって従来のフラックス人シワイヤはワ
イヤ表面に金属表面被膜が施されておらず比較的粗面の
ワイヤ表面に潤滑剤を塗付又は付着させたものが多くワ
イヤ送給性や、耐錆性に問題があった。本発明の７ラツ
クス入シワイヤはこの様な問題を一切解決したものであ
る。This is because the plating solution enters the flux through the open joints when plating is performed by dipping the wire in the plating solution, whether chemical plating or electroplating. In many cases, a metal surface coating is not applied to the wire surface, and a lubricant is applied or adhered to the relatively rough surface of the wire, which causes problems in wire feedability and rust resistance. The 7-lux shear wire of the present invention completely solves these problems.

金属めっきの厚さは実用的には０．３〜０．９ミクロン
程度の銅めっきが採用されるが、溶接金属中の銅成分の
放射線による照射脆化とか、後熱処理による脆化が予測
される場合には、Ｎｌ　＋　Ｍｎ　＋　Ａ１等のめつき
又は銅の薄めつきが採用される。さらに、ワイヤ表面に
は、不可避的に線引潤滑の油脂が残存するが、この量が
適正量であればワイヤ送給性がさらに良くなシ耐錆性も
向上する。この量はワイヤ］、０ｋ１７に対して０２〜
１．５ｇｒが好ましい１ 以下本発明の効果を第３表に示す実施例によシ説明する
。Practically speaking, copper plating with a thickness of about 0.3 to 0.9 microns is adopted, but it is predicted that the copper component in the weld metal will become embrittled due to radiation exposure or post-heat treatment. In this case, plating with Nl + Mn + A1 or the like or diluted copper plating is used. Furthermore, oil and fat for wire drawing lubrication inevitably remain on the wire surface, but if this amount is appropriate, the wire feedability will be even better and the rust resistance will also be improved. This amount is wire], 02~ for 0k17
1.5 gr is preferred 1 The effects of the present invention will be explained below with reference to Examples shown in Table 3.

第３表はワイヤ径Ｄ＝１．：ｌｌ＋ｍとし外皮厚ｔを変
えて外皮厚ｔとワイヤ径りの比ｔ／Ｄを変えるとともに
、外皮の引張強さＴを変えて比ｔ　／　Ｄ、外皮の引張
強さＴを異ならせた８種の溶接用フラックス人シワイヤ
を製造し、溶接に供してその結果を比較したものでらる
。なおワイヤはＪ　Ｉ　Ｓ　Ｇ−３１，４１ＳＰＣＥ材
を出発帯鋼とし、該帯鋼を成形して溶接鋼管を得、該鋼
管にフラックスを充填してさらに伸線加工、銅めっきを
施すことによシ製造したものであシ、帯鋼寸法を調整し
て比ｔ　／　Ｄを変え、製造工程中の最終熱処理以降に
施すワイヤ減面率を１３− 調整して外皮の引張強さを変えて表中のワイヤを製造し
た。溶接条件は第２表の場合と同様の２８ＯＡ−３ｏｖ
−３ｏａｎ７＝−ｃｏ２２ｏ１７＝とし、板厚１２．５
ａｍのＪＩＳＧ−３１１４，ＳＭＡ−５０Ｂ鋼板に下向
溶接を行なった。Table 3 shows wire diameter D=1. :ll+m, and the ratio t/D of the outer skin thickness t and wire diameter was changed by changing the outer skin thickness t, and the ratio t/D of the outer skin tensile strength T was changed, and the outer skin tensile strength T was varied8. A type of welding flux shear wire was manufactured, used for welding, and the results were compared. The wire is made by using JIS G-31, 41 SPCE material as the starting steel strip, forming the steel strip to obtain a welded steel pipe, filling the steel pipe with flux, and further wire drawing and copper plating. The steel strip dimensions were adjusted to change the ratio t/D, and the wire area reduction rate applied after the final heat treatment during the manufacturing process was adjusted to change the tensile strength of the outer skin. The wire inside was manufactured. The welding conditions are 28OA-3ov, which is the same as in Table 2.
-3oan7=-co22o17=, plate thickness 12.5
Downward welding was performed on am JISG-3114, SMA-50B steel plates.

第３表でＡ３．Ａ４．應５ワイヤはｔ／Ｄ、Ｔともに適
正な本発明例、／１６１．Ａ２．、％６．腐７゜／Ｉ６
８ワイヤはｔ／Ｄ、Ｔの少なくとも一方が適正でない比
較例のワイヤである。／１６１ワイヤは比ｔ／Ｄが小さ
適ぎて外皮厚が薄遇ぎかつ外皮の引張強さＴが小さ過ぎ
るので溶接時ワイヤの座屈等が発生しワイヤ送給性、溶
接作業性ともに不良、／Ｉ６２ワイヤは比ｔ／Ｄは適正
であるが外皮の引張強さＴが小さいのでワイヤ送給性、
溶接作業性ともにや＼不良でらった。／１６３．／１６
．４．扁５のワイヤは比ｔ／Ｄ、外皮の引張強さＴとも
に適正範囲内で６Ｄ、ワイヤ送給性、溶接作業性のいず
れも良好でろっだ。／１６６ワイヤは比ｔ／Ｄは適正で
あるが外皮の引張強さＴが大きいのでワイヤ送給性、作
業性ともにや＼不良、／Ｉ６７ワイヤは外皮の引張１４
− 強さＴは適正であるが、比ｔ／Ｄが大き過ぎて外皮厚が
厚過ぎるのでワイヤ送給性は良好であるが、ワイヤ内部
に溶接用フラックスを必要量充填できずスラグ発生量が
不足し作業性が劣り、かつ品質良好な溶接金属が得られ
ない。／Ｉ６８ワイヤは比ｔ／　Ｄ、外皮の引張強さＴ
がともに大き過ぎるのでワイヤ送給性、作業性いずれも
不良であった。A3 in Table 3. A4. The 5 wire is an example of the present invention in which both t/D and T are appropriate, /161. A2. ,%6. rot7゜/I6
8 wire is a comparative example wire in which at least one of t/D and T is inappropriate. /161 wire has a small ratio t/D, and the outer skin thickness is too thin, and the tensile strength T of the outer skin is too small, so buckling of the wire occurs during welding, resulting in poor wire feedability and welding workability. , /I62 wire has an appropriate ratio t/D, but the tensile strength T of the outer sheath is small, so the wire feedability is poor.
Both welding workability was poor. /163. /16
．． 4. The wire with flatness 5 has a ratio t/D and a tensile strength T of the outer skin of 6D within the appropriate range, and both wire feedability and welding workability are good. The /166 wire has an appropriate ratio t/D, but the tensile strength T of the outer sheath is large, so the wire feedability and workability are both poor, and the /I67 wire has an outer sheath tensile strength of 14.
- Although the strength T is appropriate, the ratio t/D is too large and the outer skin thickness is too thick, so the wire feedability is good, but the required amount of welding flux cannot be filled inside the wire, resulting in a large amount of slag. Due to the shortage, workability is poor, and weld metal of good quality cannot be obtained. /I68 wire has ratio t/D, tensile strength of outer skin T
Both were too large, resulting in poor wire feedability and workability.

次に本発明の溶接用フラックス人シワイヤの製造方法に
ついて説明する。Next, a method for manufacturing a flux shear wire for welding according to the present invention will be explained.

従来の合せ目の接合されていないフラックス人シワイヤ
の製造方法は工程中に熱処理を行わないのが通例であっ
た。すなわち、熱処理を行わなくとも充分な加工性なら
びに溶接作業性を得られるように薄板鋼板帯のサイズを
限定して製造していたからでるる。Conventional methods for manufacturing flux shear wires without jointed seams generally do not carry out heat treatment during the process. That is, this is because the size of the thin steel strip is limited in manufacturing so that sufficient workability and welding workability can be obtained without heat treatment.

本発明の製造方法の対象である溶接鋼管を用いてのワイ
ヤの製造でも熱処理を省略することが工程の簡素化の面
から望まれるが、溶接鋼管の製造時のシーム溶接熱によ
シ溶接部ならびに熱影響部の硬度が他の部分よシ高くな
シ、鋼管の断面的に見ての硬度分布が偏シ、伸線工程で
良好な生産性が得られないことと、製品でのワイヤにく
せが生じ溶接時にビードの蛇行という問題が発生する。It is desirable to omit heat treatment in the production of wire using welded steel pipes, which is the object of the production method of the present invention, from the viewpoint of process simplification. In addition, the hardness of the heat-affected zone is higher than other parts, and the hardness distribution in the cross section of the steel pipe is uneven, making it difficult to obtain good productivity in the wire drawing process, and making it difficult for the wire to be used in products. This causes the problem of meandering of the bead during welding.

このために製造工程中に少なくとも１度の熱処理は必要
になってくる。またこの熱処理は充填フラックス及び鋼
管に付着、含浸している水分、油分または潤滑剤を除去
する上で重要で６Ｄ、該処理１７− を施されたワイヤによれば溶接時に発生するヒユームは
減少し、溶接金属の水素量は低減するので溶接環境の改
善と溶接金属の品質向上に役立つ。For this reason, at least one heat treatment is required during the manufacturing process. In addition, this heat treatment is important for removing the filling flux and moisture, oil, or lubricant adhering to or impregnating the steel pipe.Wires that have been subjected to this treatment will reduce fumes generated during welding. , the amount of hydrogen in the weld metal is reduced, which helps improve the welding environment and the quality of the weld metal.

また鋼管の材質、寸法等によっては最終径まで冷間伸線
すると加工硬化しすぎ伸線加工性が低下する場合もアシ
、この場合伸線途中で熱処理（軟化焼鈍）を施す。Furthermore, depending on the material, dimensions, etc. of the steel pipe, cold drawing to the final diameter may cause too much work hardening and reduce wire drawability; in this case, heat treatment (softening annealing) is performed during wire drawing.

本発明の製造方法においては合せ目を溶接した溶接鋼管
に溶接フラックスを充填し、伸線加工して溶接用フラッ
クス人シワイヤを得るが、上記理由によシ製造工程中に
おいて少なくとも１度の熱処理を施すことが必須で６Ｄ
、最終熱処理時の鋼管からみた減面率が（１３０−６０
Ｄ）〜９７％（Ｄ：最終ワイヤ径）となるように伸線加
工を行なう。その理由として、減面率が９７％を超える
と伸線加工によシ製品におけるワイヤ外皮の引張強さが
大となって、１００　ｋｇｆ／　ｍｄを超えるようにな
り、溶接時にワイヤ折損が生じ易くなシ、ワイヤ送給性
、作業性が劣化する。逆に減面率が（１３０−６０Ｄ）
％に満だないと伸線加工を施して１８− 得た製品ワイヤの剛性が低く、ワイヤ外皮の引張強さが
７０　／　ＪＴ５　ｋｇｆ／ｍｌｊ　Ｋ達することがで
きず、溶接時にワイヤが座屈しやすくワイヤ送給性、作
業性が劣る。なお製造工程中の鋼管に施す熱処理条件は
％（ｔ（規定しないが、例えば不活性ガス、炭酸ガス、
窒素、水素ガス等の非酸化性ガス中において６００〜８
００℃の温度で２〜５時間加熱処理すればよい。又製品
溶接用フラックス人シワイヤの外皮厚すなわち前記した
比ｔ／Ｄを適正範囲０．１５〜０．３５にするには出発
鋼管の外皮厚、すなわち出発帯鋼の寸法（幅、厚さ）を
考慮すればよ（−８ 以下本発明の製造方法の具体例を第２図に示す製造工程
の流れ図に基づいて説明する。In the manufacturing method of the present invention, welding flux is filled into a welded steel pipe with welded seams, and wire drawing is performed to obtain a sheared wire for welding. However, for the above-mentioned reasons, at least one heat treatment is performed during the manufacturing process. It is mandatory to apply 6D
, the area reduction rate seen from the steel pipe during final heat treatment is (130-60
D) to 97% (D: final wire diameter). The reason for this is that when the area reduction rate exceeds 97%, the tensile strength of the wire sheath in the wire drawing product increases, exceeding 100 kgf/md, and the wire is likely to break during welding. Otherwise, wire feeding performance and workability will deteriorate. On the contrary, the area reduction rate is (130-60D)
If it is less than 18%, the rigidity of the product wire obtained by wire drawing will be low, the tensile strength of the wire sheath will not reach 70 / JT5 kgf/mlj K, and the wire will easily buckle during welding. Wire feeding performance and workability are poor. The heat treatment conditions applied to the steel pipe during the manufacturing process are % (t) (although not specified, for example, inert gas, carbon dioxide gas,
600-8 in non-oxidizing gas such as nitrogen or hydrogen gas
What is necessary is just to heat-process at the temperature of 00 degreeC for 2 to 5 hours. In addition, in order to set the outer skin thickness of the flux shear wire for product welding, that is, the above-mentioned ratio t/D, to an appropriate range of 0.15 to 0.35, the outer skin thickness of the starting steel pipe, that is, the dimensions (width, thickness) of the starting steel strip, must be adjusted. (-8) A specific example of the manufacturing method of the present invention will be described below based on the flowchart of the manufacturing process shown in FIG.

（イ）鋼管：鋼管は寸法（３７，５龍Ｘ　２．Ｏｍｍ　
）の軟鋼帯鋼を帯鋼長手方向と直角方向に屈曲させるこ
とによシ円筒形に成形して帯鋼両側縁を対向させ、高周
波誘導溶接によシ溶接して得た溶接鋼管で６．？、寸法
は外径１２．７ｉｍφ、肉厚２、　Ｑ　ｍｍである。な
お鋼管径は６〜１５ｍｍの範囲が適当である。これは鋼
管径が６　、ｍｍ　Ｋ満たないと、フラックスを充填す
るのに長時間を要し、１．６　ｍｙｎを超えるとフラッ
クスを充填させるためにコイル状に巻取ることが困難と
なるからである。又このときの鋼管肉厚ｔ。と鋼管外径
Ｄｏとの比ｔｏ／Ｄｏは製品ワイヤでの比ｔ／Ｉ）　（
０，１５ｌ　ｔ／Ｄ　ｌ　０．３５　）を考慮しテフラ
ツクス充填率とフラックス充填時（工程に））のかさ密
度で決定される。比ｔ。／Ｄｏは常に比ｔ　／　Ｄよυ
も小さい値を示す。(a) Steel pipe: Steel pipe has dimensions (37.5 x 2.0mm)
6. A welded steel pipe obtained by bending the mild steel strip of ) in a direction perpendicular to the longitudinal direction of the strip into a cylindrical shape, making both side edges of the strip face each other, and welding them by high-frequency induction welding. ? , dimensions are outer diameter 12.7 mmφ, wall thickness 2, Q mm. Note that the diameter of the steel pipe is suitably in the range of 6 to 15 mm. This is because if the steel pipe diameter is less than 6mmK, it will take a long time to fill it with flux, and if it exceeds 1.6mm, it will be difficult to wind it into a coil to fill it with flux. be. Also, the steel pipe wall thickness t at this time. The ratio to/Do of the steel pipe outer diameter Do is the ratio t/I of the product wire) (
It is determined by the te flux filling rate and the bulk density at the time of flux filling (in the process)), taking into account 0.15 l t/D l 0.35). ratio t. /Do is always a ratio t / D yoυ
also shows a small value.

（ロ）熱処理１：この熱処理は鋼管製造（工程（イ））
Ｋよって得られる溶接鋼管の溶接部と熱影響部が他の部
分よシ硬度が高くなっているので、これを均一にするた
めに行なう熱処理で６ｒ、以降の管引整列巻（工程（ハ
））、伸線加工を容易にするためのものである。熱処理
条件は雰囲気ガス二Ｎ２、温度６５０℃、時間：３時間
とした。(b) Heat treatment 1: This heat treatment is used for steel pipe manufacturing (process (a))
Since the welded part and heat affected zone of the welded steel pipe obtained by K are higher in hardness than other parts, heat treatment is performed to make this uniform. ), to facilitate the wire drawing process. The heat treatment conditions were an atmosphere of 2N2, a temperature of 650° C., and a time of 3 hours.

（−→管引整列巻：鋼管はこの工程で若干外径を縮小（
外径１’２．７→１０．Ｏｍｍφ）されてドラムに整列
巻される。(−→ Pipe drawing alignment winding: The outer diameter of the steel pipe is slightly reduced in this process (
Outer diameter 1'2.7 → 10. Ommφ) and wound in alignment on a drum.

に）フランクス光填：フランクス充填工程に）はあらか
じめ別工程でフラックス原材料を計量し湿式混合、乾燥
焼成等を行なって得られる粉末フラックスを上記管引整
列巻（ハ）にてドラムに巻回された鋼管にフラックスを
充填する工程で１、管を巻かれたドラムを該ドラムの軸
が垂直になるようにして、振動テーブル上に置き、ドラ
ムに巻かれた管の自由端をドラムの上部フランジを越え
て上方へ導き、可撓性チューブを介してフラックス容器
に接続した状態で振動によりあらかじめ決められた量の
フラックスを鋼管内に充填する。なおフラックス充＊に
先だち、あるいは充填と並行して鋼管内部の空気を溶接
に無害な不活性ガス、ＣＯ２ガス等で置換しておくとよ
い。2) Franks optical filling: In the Franks filling process), the flux raw materials are weighed in advance in a separate process, wet mixed, dried and fired, and the powder flux obtained is wound around a drum using the above-mentioned tube-pulled aligned winding (c). In the process of filling a steel pipe with flux, 1. Place the drum around which the pipe is wound on a vibrating table with the axis of the drum perpendicular, and connect the free end of the pipe wound around the drum to the top flange of the drum. A predetermined amount of flux is filled into the steel pipe by vibration while connected to a flux container via a flexible tube. Prior to or in parallel with flux filling*, it is advisable to replace the air inside the steel pipe with an inert gas, CO2 gas, etc. that is harmless to welding.

（ホ）伸線１：フラックスを充填された鋼管は、引続い
てその外径を所望の最終値（１，２ｍｍφ）に近づける
為に伸線される。この工程（ホ）で鋼管外径は１００間
から５朋に縮小される。なお２１− 次工程の熱処理２（へ）は製造工程中の最終熱処理であ
るから、該熱処理２以降での伸線加工によるワイヤ減面
率が（１３０−６０Ｄ　）〜９７％（Ｄ＝最終ワイヤ径
ｍｍ　）　、すなわち５８〜９７％（Ｄ　＝　１．２　
ｍｍ　）となる必要がアシ、本具体例では９４％の減面
率である。(E) Wire drawing 1: The steel pipe filled with flux is subsequently drawn to bring its outer diameter closer to the desired final value (1.2 mmφ). In this step (E), the outer diameter of the steel pipe is reduced from 100mm to 5mm. Note that 21-The next step, heat treatment 2, is the final heat treatment in the manufacturing process, so the wire area reduction rate due to wire drawing after heat treatment 2 is from (130-60D) to 97% (D = final wire diameter mm), i.e. 58-97% (D = 1.2
mm ), and in this specific example, the area reduction rate is 94%.

（へ）熱処理２：こり熱処理は上述した如く最終熱処理
でアシ、冷間伸線加工途中の鋼管に施す軟化のための熱
処理でアシかつ充填フラックス、鋼管に付着している水
分、油分等を除去するために施す熱処理である。熱処理
条件は雰囲気ガス：Ｎ２、温度＝６５０℃、時間＝４時
間とした。(f) Heat treatment 2: As mentioned above, stiffness heat treatment is a final heat treatment to remove reeds, a softening heat treatment applied to steel pipes during cold wire drawing to remove reeds, filling flux, moisture, oil, etc. attached to steel pipes. This is a heat treatment applied to The heat treatment conditions were atmospheric gas: N2, temperature = 650°C, and time = 4 hours.

（ト）（ト）（１乃休）：伸線２（ト）で外径が５．　
Ｏｍｍから２．　Ｏｍｍに縮小される。そしてめっき処
理（イ）に送られ、鋼管表面に銅めっきが施され、しか
る後にスキンバス伸線（ｌ刀で外皮鋼管の外径は２，０
龍から１．２間の最終ワイヤ径まで縮小される。最後に
製品（ヌ）にて、ワイヤは整列巻、必や巻等のスプール
巻キニされるか、ペイルパック内２２− に装填されて製品としての溶接用フラックス人シワイヤ
となる。(G) (G) (1 to 1 day off): Wire drawing 2 (G) with an outer diameter of 5.
Omm to 2. Reduced to Omm. The steel pipe is then sent to plating treatment (a), where copper plating is applied to the surface of the steel pipe.Then, the outer diameter of the steel pipe is reduced to 2.0
The final wire diameter is reduced to between 1.2 and 1.2 mm. Finally, in the product (N), the wire is spool-wound, such as aligned winding, continuous winding, etc., or loaded into a pail pack 22- to become a welding flux shear wire as a product.

このようにして製造された本具体例の溶接用フラックス
人シワイヤは、ワイヤ径Ｄ　＝　１．、２７ｆ１ｍ、外
皮環ｔ　＝　０．３　ｍｍ、此ｔ／Ｄ＝０．２５で外皮
の引張強さＴ　＝　９２　ｋｇｆ　／ｍＡであった。そ
してこのワイヤを第２表の場合と同様の溶接条件で溶接
に供したところワイヤ送給性、溶接作業性ともに良好な
結果を得た。The flux shear wire for welding of this specific example manufactured in this manner has a wire diameter D = 1. , 27f1m, the outer skin ring t = 0.3 mm, this t/D = 0.25, and the tensile strength of the outer skin T = 92 kgf /mA. When this wire was subjected to welding under the same welding conditions as in Table 2, good results were obtained in both wire feedability and welding workability.

なお上記製造方法の具体例における出発鋼管の寸法（外
径、厚さ）、伸線１，２での減面率、熱処理１．炎での
熱処理条件、鋼管へのフラックス充填方法、充填率等は
一例に過ぎず、本発明の主旨を逸脱しない範囲で適宜に
設備能力、所望製品寸法等に合せて変更することができ
る。In addition, in the specific example of the above manufacturing method, the dimensions (outer diameter, thickness) of the starting steel pipe, the area reduction ratio in wire drawing 1 and 2, and the heat treatment 1. The heat treatment conditions with flame, the method of flux filling into the steel pipe, the filling rate, etc. are merely examples, and can be changed as appropriate according to equipment capacity, desired product dimensions, etc. without departing from the gist of the present invention.

以上説明したように本発明の溶接用フラックス人シワイ
ヤによれば、細径のワイヤであってワイヤの外皮環とワ
イヤ径との比および外皮の引張強さが適正範囲に規制さ
れているので、溶接状態（ワイヤ送給性、溶接作業性）
が良好となる。そして本発明の製造方法によれば、上記
ワイヤを得るための最も好ましい製造方法であって、そ
の工業的価値は極めて大きい。As explained above, according to the flux shear wire for welding of the present invention, the wire has a small diameter and the ratio of the outer sheath ring to the wire diameter and the tensile strength of the outer sheath are regulated within appropriate ranges. Welding condition (wire feedability, welding workability)
becomes good. According to the manufacturing method of the present invention, it is the most preferred manufacturing method for obtaining the above-mentioned wire, and its industrial value is extremely large.

【図面の簡単な説明】[Brief explanation of drawings]

第１図はワイヤの外皮環ｔとワイヤ径りの比ｔ　／　Ｄ
とフラックス充填率ｑ（％）の関係を示した図、第２図
は溶接用フラックス人シワイヤの製造工程の流れ図であ
る。 特許出願人代理人 弁理士　矢　葺　知　之 （ばか１名）Figure 1 shows the ratio t/D of the wire outer ring t and the wire diameter.
FIG. 2 is a flowchart of the manufacturing process of welding flux shear wire. Patent applicant representative patent attorney Tomoyuki Yafuki (one idiot)

Claims (1)

【特許請求の範囲】 １、合せ目を溶接した溶接鋼管に溶接フラックスを充填
したワイヤ径ＤＩＪ″−Ｄ＝１．０〜２．０關の細径溶
接用フラックス入りワイヤであって、外皮厚ｔ　ト’１
７　（ヤ径りがｏ、１５ｆ　ｔ／Ｄ、ｆｆｃ）、３５　
テロること、および外皮の引張強さＴがＴ＝７０／４〜
１００ｋｇｆ／−であることを特徴とする溶接用フラッ
クス入シワイヤ。 ２、合せ目を溶接した溶接鋼管に溶接フラックスを充填
し、伸線加工を行なって溶接用フラックス中りワイヤを
製造する［６たシ、製造工程の途中で少なくとも１度の
熱処理を行ない、最終熱処理以降にワイヤ減面率（１３
０−６０Ｄ　）〜９７％（Ｄ：最終ワイヤ径龍）の伸線
加工を施すことを特徴とする溶接用フラックス人シワイ
ヤの製造方法。[Claims] 1. A flux-cored wire for welding with a small diameter of DIJ''-D = 1.0 to 2.0, which is a welded steel pipe with a seam welded and filled with welding flux, the outer skin thickness being approximately 1.0 to 2.0. t to'1
7 (Year diameter is o, 15f t/D, ffc), 35
In addition, the tensile strength T of the outer skin is T = 70/4 ~
A flux-cored shear wire for welding, characterized in that it has a weight of 100 kgf/-. 2. Fill the welded steel pipe with welded joints with welding flux, and perform wire drawing to produce a welding flux-filled wire. After heat treatment, the wire area reduction rate (13
0-60D) to 97% (D: final wire diameter).