JPS62104695A - Composite wire for welding - Google Patents

Abstract

PURPOSE:To obtain a composite wire for welding having a good wire feeding property and an excellent welding workability by packing a bark formed tubularly, with a flux, and also concentrating and packing locally a conductive substance in the flux and making it contact the bark. CONSTITUTION:A steel band 5 which becomes a bark 1 is formed in the shape of a semicircle by a forming roller 6, and thereafter, a conductive substance A, and a nonconductive substance B are packed successively and lamellately in a prescribed ratio from a flux hopper 3 and flux hoppers 4, 4, respectively. Subsequently, the bark 1 is formed tubularly by a forming roller 7, and a joint part is welded, and joined and closed up tightly. Thereafter, copper plating is performed to the bark 1 as necessary, a tubular body is rolled and drawn, and a composite wire 9 for welding is obtained. As for said wire 9, the conductive substance A in a flux contacts the bark 1, and at the time of welding, an arc is generated from the center part of the wire and an unmelted flux is prevented from being projected, and a spatter is decreased remarkably.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は溶接用複合ワイヤに係り、特に送給性が良くか
つ溶接作業性のすぐれた溶接用複合ワイヤに関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a composite wire for welding, and particularly to a composite wire for welding that has good feedability and excellent welding workability.

（従来の技術） 最近造船、橋梁、圧力容器、海洋構造物等の溶接構造物
の建造において、溶接の高能率化、省力化が急速に進め
られている。中でも溶接用複合ワイヤが内部に充填する
フラックスの作用効果により良好な溶接部が得られ易い
こと、また高能率溶接が可能であることなどの理由から
急激な発展を示している。(Prior Art) Recently, in the construction of welded structures such as shipbuilding, bridges, pressure vessels, and offshore structures, improvements in welding efficiency and labor saving have been rapidly progressing. Among these, composite wires for welding are showing rapid development because of the ease with which good welds can be obtained due to the action and effect of the flux filled inside, and because high-efficiency welding is possible.

従来の複合ワイヤには第３図に示すような種々の断面構
造のものがあるが、以下に述べる様な問題点がある。Conventional composite wires have various cross-sectional structures as shown in FIG. 3, but they have the following problems.

即ち第３図（イ）、（ロ）に示す複雑断面の複合ワイヤ
は、ワイヤを構成する鋼の外皮１の部分からアークが発
生するので充填フラックス８未溶融フラツクスの突出し
もなく良好なアーク特性を示すが２、４　ｗｍ以下の細
径にする場合、伸線加工が難しく製造に問題があること
、まだワイヤにねじれや方向性があるためワイヤ送給性
が悪く溶接時の作業負荷が大きいという欠点がある。な
お、図中２は合せ口部である。In other words, the composite wire with a complex cross section shown in FIGS. 3(a) and 3(b) has good arc characteristics with no protrusion of the filling flux 8 and unmelted flux because the arc is generated from the outer skin 1 of the steel that constitutes the wire. However, if the diameter is smaller than 2 or 4 wm, it is difficult to draw the wire and there are manufacturing problems, and the wire still has twisting and directionality, so the wire feedability is poor and the work load during welding is large. There is a drawback. In addition, 2 in the figure is a mating opening part.

一方第３図（ハ）、に）に示す単純断面の複合ワイヤは
２．４　ｍ以下の細径ワイヤが製造し易く、かつワイヤ
の送給性も良好であるという利点がある。しかしこれら
単純断面の複合ワイヤは溶接時に外皮１が早く溶融し、
充填スラックス８の溶融が遅れるため未溶融フラックス
の突出しが出易く、溶接部にスラグ巻込み等の溶接欠陥
が発生したりアークが不安定になってスパッタが発生す
るなど特に溶接作業性の点で問題がある。この単純断面
ワイヤの問題を解決するため、例えば特開昭５８−１４
８０９５号公報に示される様な充填７ラツクス中にＬｉ
の炭酸塩（Ｌ１２ＣＯ３）等を含有させてスラックス融
点の低下効果によって未溶融フラックスの突出しを短か
くすることを意図したワイヤがあるが、必ずしも満足す
るものではなく逆に炭酸塩が分解してＣ０２の発生が激
しくス・母ツタの多発を招くという問題がある。On the other hand, the composite wire having a simple cross section shown in FIGS. 3(c) and 3(a) has the advantage that it is easy to manufacture a thin wire of 2.4 m or less and has good wire feedability. However, in these composite wires with a simple cross section, the outer skin 1 melts quickly during welding,
Because the melting of the filling slack 8 is delayed, unmelted flux is likely to protrude, causing welding defects such as slag entrainment in the welded part, and the arc becoming unstable and spatter, which is particularly problematic in terms of welding workability. There's a problem. In order to solve the problem of this simple cross-section wire, for example,
Li in the packed 7 lacs as shown in Japanese Patent No. 8095
There is a wire that is intended to shorten the protrusion of unmelted flux by lowering the slack melting point by containing carbonate (L12CO3), etc., but it is not always satisfactory and on the contrary, the carbonate decomposes and C02 There is a problem in that the occurrence of soot and mother ivy is severe, leading to frequent occurrence of smut and mother ivy.

（発明が解決しようとする問題点） 本発明は上記従来複合ワイヤの欠点を解消しようとした
ものであシ、ワイヤ送給性にすぐれた単純断面ワイヤで
未溶融フラックスの突出しを防止して溶接作業性のすぐ
れた溶接用複合ワイヤを提供するものである。(Problems to be Solved by the Invention) The present invention is an attempt to solve the above-mentioned drawbacks of the conventional composite wire.It is an object of the present invention to solve the above-mentioned drawbacks of the conventional composite wire. The present invention provides a welding composite wire with excellent workability.

（問題点を解決するための手段） 即ち、既述した様に単純断面の複合ワイヤの問題点は溶
接時に外皮が早く溶融し、充填フラックスの溶融が遅れ
るいわゆる未溶融フラックスの突出しが出易いことであ
るが、この原因は充填７う、クスが通電しにくいことに
ある。つまり、充填フラックスはスラブ剤としての酸化
物、ぶつ化物、炭酸塩などの非金属粉と脱酸剤、合金剤
、鉄粉などの金属粉を用途に応じた比率で配合し、成分
偏析のない様に撹拌して均一化したのち外皮に充填する
ものであるため、複合ワイヤ中の充填フラックスは非導
電性の非金属フラックスに支配されてほとんど通電しな
いことになる。本発明者らはこの欠点を改善するため種
々実験を重ねた結果、導電性物質である鉄粉、金属粉を
故意に偏析させてその一部を外皮内面と接触させるよう
にフラックス中に分布させることＫよシ、ワイヤの中心
部からもアークが発生して未溶融フラックス突出しを防
止し、スパッタを著しく減少させ得るという知見を得て
本発明を行ったものである。(Means for solving the problem) That is, as mentioned above, the problem with composite wires with simple cross sections is that the outer skin melts quickly during welding, and the so-called unmelted flux tends to protrude, which delays the melting of the filling flux. However, the cause of this is that it is difficult to conduct electricity during filling. In other words, filling flux is made by blending non-metallic powders such as oxides, lumps, carbonates, etc. as slab agents and metal powders such as deoxidizers, alloying agents, iron powders, etc. in proportions depending on the application, and is free from component segregation. Since the composite wire is filled into the outer shell after being stirred and homogenized, the filling flux in the composite wire is dominated by the non-conductive non-metallic flux and hardly conducts electricity. In order to improve this drawback, the inventors of the present invention conducted various experiments and found that conductive substances such as iron powder and metal powder were intentionally segregated and distributed in the flux so that some of them came into contact with the inner surface of the outer skin. The present invention was developed based on the knowledge that an arc is generated even from the center of the wire, which prevents unmelted flux from protruding and significantly reduces spatter.

即ち本発明の要旨とするところは管状に成形された外皮
にフラックスを充填してなる溶接用複合ワイヤにおいて
、該フラックス中の導電性物質が少くともその一部が外
皮と接触するようにフラックス材で極部的に集中充填さ
れていることを特徴とする溶層用複合ワイヤにある。That is, the gist of the present invention is to provide a welding composite wire in which a tubular outer sheath is filled with flux, in which a flux material is used so that at least a part of the conductive substance in the flux comes into contact with the outer sheath. A composite wire for a molten layer is characterized in that it is locally concentratedly filled with.

以下に本発明について詳細に説明する。The present invention will be explained in detail below.

（作用） 第１図は本発明実施例ワイヤの断面例を示す図であり、
１は銅帯によって形成された外皮、２は合わせ目であっ
て、このように管状に形成されたワイヤ中には非導電性
フラックス材物質Ｂのほぼ中央部近傍に導電性フラック
ス財物質入が第１図（イ）の如く分布充填されている。(Function) FIG. 1 is a diagram showing a cross-sectional example of a wire according to an embodiment of the present invention.
1 is the outer skin formed by the copper strip, 2 is the seam, and in the wire formed into a tubular shape, a conductive flux material is inserted approximately near the center of the non-conductive flux material B. They are distributed and packed as shown in Figure 1 (a).

同図においては、導電性物質Ａの両端が外皮１と接触し
ている態様を示したが１．これは第１図（ロ）、（ハ）
に見られる如く、導電性物質Ａの少なくともその一部が
外皮１と接触していればよく、又、その接触位置も第１
図（イ）〜（ハ）に見られる如く、特にこだわるもので
はない。In the figure, a mode is shown in which both ends of the conductive substance A are in contact with the outer skin 1.1. This is Figure 1 (b) and (c)
As shown in FIG.
As shown in Figures (A) to (C), there is no particular concern.

このように充填フラックスを分布させることによυ、外
皮１の外側から溶接チップにより給電された電流は、導
電性物質Ａにも流れることになりワイヤ中心部からもア
ークが発生する。このため未溶融フラックスの突出しが
減少し、従来よりも大巾にアーク現象が改善されるもの
−と認゛められる。By distributing the filling flux in this way, the current supplied by the welding tip from the outside of the outer sheath 1 also flows through the conductive material A, and an arc is also generated from the center of the wire. Therefore, the protrusion of unmelted flux is reduced, and it is recognized that the arc phenomenon is improved to a greater extent than in the past.

なお導電性物質は両側の外皮内面と接触する様に分布さ
せるのが好ましいが、前述の通シ片側にだけその一部が
接触していても通電性は損われないため同様の効果が得
られる。It is preferable to distribute the conductive substance so that it is in contact with the inner surface of the outer skin on both sides, but even if a part of it is in contact with only one side of the above-mentioned through hole, the same effect can be obtained because the conductivity is not impaired. .

次に本発明において用いられる導電性物質とはＳ　Ｉ　
、Ｍｎ　＋Ｔｉ　＋Ｆｅ　＋Ｎｉ　、Ｃｒ　、Ｍｏ　＋
Ｃｕ　ｔＡＬ＋Ｍｇ　＋Ｚｎなど主として脱酸剤、合金
剤の役割を担う金属粉のフラックスを指すものであり、
それぞれ単体で用いても良いしそれらの合金形態、即ち
Ｆｅ−８ｉ、Ｆｅ−Ｍｎ、Ｎｉ−Ｍｇ。Next, the conductive substance used in the present invention is S I
, Mn + Ti + Fe + Ni, Cr, Mo +
It refers to the flux of metal powder, such as Cu tAL + Mg + Zn, which mainly plays the role of a deoxidizing agent and an alloying agent.
Each may be used alone or in the form of an alloy thereof, ie, Fe-8i, Fe-Mn, Ni-Mg.

Ｓ　ｉ　−Ｍｎ　、Ａｔ−Ｍｇ　、Ｆｅ　−Ｔ　Ｉ　、
などの形態で用いても良い。Si-Mn, At-Mg, Fe-TI,
It may also be used in the form of

また非導電性物質とはＴ　ｌｏ２．Ｓ　１０２．Ａｔ２
０３．に２０　。Also, non-conductive substances are T lo2. S102. At2
03. 20 to.

Ｎａ　２０　、ＭｇＯ、Ｃａｏなどの酸化物、ＣａＦ２
　、ＢａＦ２　、Ｓ　ＩＦ２　。Oxides such as Na20, MgO, Cao, CaF2
, BaF2, SIF2.

ＮａＦ、ＬＩＦ、ＫＦ、に２ＳＩＦ６などのぶつ化物、
およびＣａ■３ＢａＣＯ３、ＭｇＣＯ３、Ｌｉ　２ＣＯ
３、Ｎｙ２ＣＯ５、に２ＣＯ３などの炭酸塩など、主と
してスラグ形成剤の役割を担う非金属粉のフラックスを
指すものである。Combined compounds such as NaF, LIF, KF, and 2SIF6,
and Ca■3BaCO3, MgCO3, Li2CO
3. It refers to a flux of non-metallic powder, such as carbonates such as Ny2CO5 and 2CO3, which mainly plays the role of a slag forming agent.

このように構成される本発明複合ワイヤに充填する７う
、クスは、チタ二ャ系のガスシールド用フラックスをは
じめライムチタニャ系やライム系ガスシールド用複合ワ
イヤ、セルフシールド用複合ワイヤ、あるいは潜弧溶接
用複合ワイヤに用いられる７う、クスで良い。The flux to be filled in the composite wire of the present invention constructed as described above may be a titania-based gas shielding flux, a lime titania-based or lime-based gas shielding composite wire, a self-shielding composite wire, or a submerged arc flux. 7-glue used for composite wire for welding may be used.

またワイヤサイズはガスシールドおよびセルフシールド
溶接の場合は使用特性上の観点から２．４−以下の細径
にするのが好ましいが、潜弧溶接等に適用される場合は
３．２−以上の太径゛にすることもできる。In addition, in the case of gas shield and self-shield welding, it is preferable that the wire size be 2.4- or less in diameter from the viewpoint of usage characteristics, but when applied to submerged arc welding, etc. It can also be made larger in diameter.

なお、外皮合せ口部２を第１図（ロ）に示す如く必要に
応じて溶接あるいは接着剤で接合密閉すれば、合せ口部
がないだめ鋼メッキが可能でワイヤ送給性耐錆性が良好
であるばかりでなく、充填フラックスの吸湿が全くない
など、さらに良好な溶接特性を得ることができる。In addition, if the outer skin mating opening 2 is welded or bonded and sealed with adhesive as necessary, as shown in Figure 1 (b), it is possible to use steel plating without the mating opening, which improves wire feedability and rust resistance. Not only are the welding properties good, but even better welding properties can be obtained, such as no moisture absorption of the filling flux.

本発明ワイヤは軟鋼、５０キロ鋼のみならず用途に応じ
て高張力鋼、低合金鋼、高合金鋼、ステンレス鋼などあ
らゆる鋼種に適用されるものである。The wire of the present invention is applicable not only to mild steel and 50kg steel but also to all types of steel, such as high-tensile steel, low alloy steel, high alloy steel, and stainless steel, depending on the application.

次に本発明ワイヤの製造手段の一例について述ぺる。第
２図は本発明ワイヤ製造工程の一例で、各工程での断面
形状を対応して示している。製造に際しては、まず導電
性物質入と非導電性物質Ｂを別々に混合、撹拌したのち
、第２図のフラックスホッパー３には導電性物質Ａを、
またフラックスホラ・平−４には非導電性物ＪＢを投入
する。次に外皮１となる鋼帯５を成形ロール６で半円状
に成形したのち、上記フラックスを所定の割合で順次層
状に充填し所望の充填率となるように調整する。ついで
成形ロール７で管状に成形したのち、圧延伸線工程を経
て複合ワイヤ９を得るものである。Next, an example of a means for manufacturing the wire of the present invention will be described. FIG. 2 shows an example of the wire manufacturing process of the present invention, and shows the cross-sectional shape in each process. During production, first, the conductive material and the non-conductive material B are mixed and stirred separately, and then the conductive material A is placed in the flux hopper 3 in Fig. 2.
In addition, non-conductive material JB is added to the flux hole Hei-4. Next, the steel strip 5 that will become the outer skin 1 is formed into a semicircular shape using forming rolls 6, and then filled with the flux in layers at a predetermined ratio, and adjusted to a desired filling rate. The wire is then formed into a tubular shape using forming rolls 7, and then subjected to a rolling and drawing process to obtain a composite wire 9.

以下に本発明の効果を実施例によって更に具体的に説明
する。The effects of the present invention will be explained in more detail below using Examples.

（実施例） 第１表にフラックス組成、第２表に複合ワイヤの構成を
示す。この試作ワイヤを用いて第３表の溶接条件で水平
すみ肉溶接を自動で行い、未溶融フラックスの突出長さ
、およびスバ、り発生量を測定すると同時にワイヤ送給
性をも調査した。(Example) Table 1 shows the flux composition, and Table 2 shows the composition of the composite wire. Using this prototype wire, horizontal fillet welding was automatically performed under the welding conditions shown in Table 3, and the protruding length of unmelted flux and the amount of splintering were measured, as well as the wire feedability was investigated.

なお未溶融フラックスの突出し長さは高速度カメラによ
る写真撮影より求め、スパッタ址は銅製容器で囲って溶
接することにより全量捕集し１分間当りの発生量として
評価した。調査結果を第４表に示す。The protrusion length of the unmelted flux was determined by taking a photograph with a high-speed camera, and the entire amount of spatter was collected by surrounding it with a copper container and welding, and the amount generated per minute was evaluated. The survey results are shown in Table 4.

第２表、第３表においてＡ　１　、３　、５　、７　、
９が本発明ワイヤであシＡ　２　、４　、６　、８　、
１０が比較ワイヤでそれぞれ本発明ワイヤと同一組成の
フラックスをＡ、Ｂ混合して従来工程により製造された
ものである。本発明の条件を満たす４１゜３．５．７．
９はガスシールドワイヤ、セルフシールドワイヤ、充填
フラックス組成を問わず、７ラツクス突出し長さが短か
くスフ４ツタ発生量も少ない。また送給性も良好であっ
た。これに対し従来工程による比較ワイヤは突出し長さ
が長くスパッメが多発したｐ　（Ａ　２　、４　、６　
、８　）、ワイヤ送給性が不良（Ａ　１０　）で採用で
きない。In Tables 2 and 3, A 1 , 3 , 5 , 7 ,
9 is the wire of the present invention A 2 , 4 , 6 , 8 ,
Reference numeral 10 indicates a comparative wire, which was manufactured by a conventional process by mixing fluxes A and B having the same composition as the wire of the present invention. 41°3.5.7 which satisfies the conditions of the present invention.
No. 9 has a short protrusion length of 7 lux and a small amount of ivy generation, regardless of whether it is a gas shield wire, a self-shield wire, or a filling flux composition. Moreover, the feedability was also good. On the other hand, the comparative wire produced by the conventional process had a long protrusion length and many spammers p (A 2 , 4 , 6
, 8), wire feedability is poor (A 10 ) and cannot be adopted.

（発明の効果） 以上の様に本発明の溶接用複合ワイヤは、従来単純断面
ワイヤの問題点であった未溶融フラックスの突出し現象
を解決することによってすぐれた溶接作業性と良好なワ
イヤ送給性が同時に得られるため、溶接用複合ワイヤの
適用分野拡大と溶接の高能率化、省力化に大きく寄与す
るものである。(Effects of the Invention) As described above, the composite wire for welding of the present invention has excellent welding workability and good wire feeding by solving the protrusion phenomenon of unmelted flux, which was a problem with conventional simple cross-section wires. Since the wire can be used at the same time, it greatly contributes to expanding the field of application of composite wire for welding, increasing the efficiency of welding, and saving labor.

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

第１図（イ）、（ロ）、（ハ）、に）は本発明実施例ワ
イヤの断面例を示す図、第２図は本発明ワイヤの調造工
程の一例を示す図、第３図（イ）、（ロ）、（ハ）、（
ロ）は従来ワイヤの断面図である。 １・・・外皮、　　　　　２・・・合せ弓部、３．４・
・・フラックスホラ／Ｊ−１ ５・・・鋼帯、　　　　　　６，７・・・成形ロール、
８・・・充填フラックス、９・・・複合ワイヤ。 岸　　１）　正　　行ｊｒＪ’−］ １し−ノ。 第３Figures 1 (a), (b), (c), and (b) are diagrams showing cross-sectional examples of wires according to the present invention, Figure 2 is diagrams showing an example of the preparation process for the wire of the present invention, and Figure 3 (a), (b), (c), (
B) is a sectional view of a conventional wire. 1... Outer skin, 2... Combined arch section, 3.4.
...Flux Hola/J-1 5... Steel strip, 6,7... Forming roll,
8...Filling flux, 9...Composite wire. Kishi 1) Positive line jrJ'-] 1shi-no. Third

Claims (1)

【特許請求の範囲】[Claims] 管状に成形された外皮にフラックスを充填してなる溶接
用複合ワイヤにおいて、該フラックス中の導電性物質が
少くともその一部が外皮と接触するようにフラックス中
で極部的に集中充填されていることを特徴とする溶接用
複合ワイヤ。In a welding composite wire formed by filling a flux into a tubular outer sheath, the conductive substance in the flux is locally concentrated in the flux so that at least a part of it comes into contact with the outer sheath. Composite wire for welding characterized by: