JPH0970685A - Wire for gas shielded arc welding having good welding workability and its production - Google Patents
Wire for gas shielded arc welding having good welding workability and its productionInfo
- Publication number
- JPH0970685A JPH0970685A JP16337796A JP16337796A JPH0970685A JP H0970685 A JPH0970685 A JP H0970685A JP 16337796 A JP16337796 A JP 16337796A JP 16337796 A JP16337796 A JP 16337796A JP H0970685 A JPH0970685 A JP H0970685A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- welding
- gas shielded
- recesses
- shielded arc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Nonmetallic Welding Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ワイヤ表面に銅メ
ッキを施した外径０．８〜２．４ｍｍφの鋼線からなる
耐変色性、耐錆性を有し、溶接作業性の良いガスシール
ドアーク溶接用ワイヤおよびその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas having excellent discoloration resistance and rust resistance, which is made of a steel wire having an outer diameter of 0.8 to 2.4 mm.phi. The present invention relates to a shield arc welding wire and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】溶接作業性の良いガスシールドアーク溶
接用ワイヤを得るために、ワイヤ表面の特性に着目し送
給性改善を狙った多くの技術がある。例えば、特公昭５
８−５６６７７号公報には、次式で示されるワイヤ表面
の平坦率が８０％以下となるように調整してなることを
特徴とする送給性のすぐれた溶接ワイヤが開示されてい
る。 平坦率＝（伸線ダイスの摩擦により平坦化された部分の
面積）／（ワイヤの全表面積）×１００％。2. Description of the Related Art In order to obtain a wire for gas shielded arc welding having good welding workability, there are many techniques aimed at improving the feedability by paying attention to the characteristics of the wire surface. For example,
Japanese Patent Laid-Open No. 8-56677 discloses a welding wire having excellent feedability, which is characterized in that the flatness of the wire surface represented by the following equation is adjusted to 80% or less. Flatness = (area of a portion flattened by friction of wire drawing die) / (total surface area of wire) × 100%.
【０００３】また、特公昭６３−２１５９５号公報には
送給性の優れた溶接ワイヤとして、ワイヤ表面に亀裂に
より生じたワイヤ長手方向に対して３０〜１５０°の角
度範囲にある横溝が分布し、さらにワイヤ表面に液状潤
滑剤を有する溶接用ワイヤが開示されている。また、特
公昭６４−９１１７号公報には、ワイヤ表面にメッキ層
の亀裂を有し、メッキ層下部の鋼表面から０．１ｍｍ深
さの層に存在する酸素が０．１ｍｍを越える内部よりも
５０〜４００ｐｐｍに増量しており、さらにワイヤ表面
に液状潤滑剤を有する溶接用細径鋼ワイヤが開示されて
いる。Further, Japanese Patent Publication No. 63-21595 discloses a welding wire having excellent feedability, in which lateral grooves in the angle range of 30 to 150 ° with respect to the longitudinal direction of the wire generated by cracks are distributed on the surface of the wire. Furthermore, a welding wire having a liquid lubricant on the wire surface is disclosed. Further, in Japanese Patent Publication No. 9117/1989, there is a crack in the plating layer on the surface of the wire, and the oxygen present in the layer at a depth of 0.1 mm from the steel surface below the plating layer is more than that in the interior where the oxygen exceeds 0.1 mm. A small diameter steel wire for welding is disclosed, which has been increased to 50 to 400 ppm and further has a liquid lubricant on the wire surface.
【０００４】[0004]
【発明が解決しようとする課題】以上のような従来技術
では、ワイヤの伸線工程においてワイヤ表面に亀裂を多
量に発生させるものである。ワイヤ表面に亀裂が存在す
ると、溶接用ワイヤが市場に流通する過程において、こ
の亀裂内に入っている伸線潤滑剤、水分、油分、又は異
物等が経時劣化し、これが引き金となって、ワイヤが変
色したり、錆を発生したりする。また、ワイヤ内部の酸
化層も同様に経時的に劣化し、変色、発錆の原因とな
り、ワイヤの送給性を害したり、溶接作業性を劣化させ
るという問題がある。In the above-mentioned prior art, a large amount of cracks are generated on the wire surface in the wire drawing process. If a crack is present on the wire surface, the wire drawing lubricant, moisture, oil, or foreign matter contained in the crack deteriorates with time in the process of distribution of the welding wire to the market. Discolors or rusts. Further, similarly, the oxide layer inside the wire also deteriorates with time, causing discoloration and rusting, which impairs the wire feedability and deteriorates the welding workability.
【０００５】本発明はこのような問題点を解決した溶接
作業性の良いガスシールドアーク溶接用ワイヤおよびそ
の製造方法を開発し、これを提供することを目的とする
ものである。An object of the present invention is to develop and provide a wire for gas shielded arc welding having good welding workability and a method for producing the same, which solves the above problems.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記問題点を
解決するために、次の技術手段を講じたことを特徴とす
る耐変色性、耐錆性を有する溶接作業性の良いガスシー
ルドアーク溶接用ワイヤである。すなわち本発明は、任
意の差渡し寸法が１μｍ以上８μｍ以下の凹部が製品ワ
イヤ表面に１００〜１０００個／ｍｍ2 存在することを
特徴とする溶接作業性の良いガスシールドアーク溶接用
ワイヤである。DISCLOSURE OF THE INVENTION In order to solve the above-mentioned problems, the present invention has taken the following technical means, and is a gas shield having discoloration resistance and rust resistance and good welding workability. It is a wire for arc welding. That is, the present invention is a wire for gas shield arc welding having good welding workability, characterized in that there are 100 to 1,000 recesses / mm 2 on the surface of the product wire, the recesses having an arbitrary delivery dimension of 1 μm or more and 8 μm or less.
【０００７】この場合において、ワイヤ表面に存在する
凹部は上記差渡し寸法範囲外のものも存在することがあ
るが、前記任意の差渡し寸法が８μｍを越える凹部が存
在しないものは、特に優れている。なお、前記任意の差
渡し寸法が１μｍ未満の凹部が共存することは、ワイヤ
の製造工程上不可避のことでもあり、また、溶接作業性
に対して差支えはない。In this case, some of the recesses existing on the wire surface may be out of the above-mentioned delivery dimension range. However, those without any recess having an arbitrary delivery dimension exceeding 8 μm are particularly excellent. There is. It should be noted that the coexistence of the above-mentioned arbitrary recesses having a delivery dimension of less than 1 μm is unavoidable in the wire manufacturing process, and there is no problem with respect to welding workability.
【０００８】凹部の差し渡し寸法が８μｍを越えると、
ワイヤの変色、発錆を生じるので制限する。従って、こ
のような凹部が存在しないワイヤが好適である。しか
し、これを絶無とするのは製造工程上で過度の制約を課
することとなるので、可及的に生じないようにすること
で良い。また、凹部が上記寸法範囲内にあったとしても
その数が、１００個／ｍｍ2 未満では、送給性改善の効
果が乏しい。一方、このような適正寸法の凹部が１００
０個／ｍｍ2 を越えて存在すると、凹部に残留した乾式
潤滑剤、水分、油分、異物が経時劣化を起こし、ワイヤ
に変色、発錆を生じて、溶接作業性、送給性が劣化する
問題があるので制限される。If the dimension of the recessed portion exceeds 8 μm,
Limit the wire as it causes discoloration and rusting. Therefore, a wire that does not have such a recess is suitable. However, since this imposes excessive restrictions on the manufacturing process, it is preferable to prevent this from occurring as much as possible. Even if the number of recesses is within the above range, if the number of recesses is less than 100 / mm 2 , the effect of improving the feedability is poor. On the other hand, there are 100
If it exceeds 0 pieces / mm 2 , dry lubricant, water, oil and foreign matter remaining in the recessed parts deteriorate over time, causing discoloration and rusting of the wire, which deteriorates welding workability and feedability. Limited due to problems.
【０００９】このようなワイヤは、１次伸線工程におい
て乾式潤滑剤中の無機物系の比率を上げて伸線した後、
Ｋ含有物の塗布を行い、焼鈍し次いで２次伸線を行うこ
とによって製造することができる。本発明におけるワイ
ヤ表面の凹部の差渡し寸法及び分布数は次のようにして
測定する。寸法及び分布数はＳＥＭ（走査型電子顕微
鏡）を用い倍率４００倍にて観察、カウントし、４視野
の平均値を計算する。ただし、一続きの凹部において、
隙間が１μｍ未満の部分は、凹部に含まれないものと見
なし分布数をカウントする。例えば図２に示すような凹
部１は１μｍ未満の幅の部分を無視するので、各１個の
凹部２、３の２個にカウントする。[0009] Such a wire is drawn in the primary drawing process by increasing the proportion of the inorganic material in the dry lubricant,
It can be manufactured by applying a K-containing material, annealing, and then performing secondary wire drawing. The delivery dimension and distribution number of the recesses on the wire surface in the present invention are measured as follows. The size and the number of distributions are observed with an SEM (scanning electron microscope) at a magnification of 400 times and counted, and the average value of four visual fields is calculated. However, in the continuous recess,
A portion having a gap of less than 1 μm is regarded as not included in the concave portion and the number of distributions is counted. For example, since the concave portion 1 as shown in FIG. 2 ignores a portion having a width of less than 1 μm, it is counted as two concave portions 2 and 3 respectively.
【００１０】次に、本発明の方法の発明は、深さ１μｍ
以上の表面亀裂の延長合計が、１００μｍ／ｍｍ2 以
上、５００μｍ／ｍｍ2 以下で、かつ任意の差渡し寸法
が１μｍ以上８μｍ以下の凹部が製品ワイヤ表面に１０
０〜１０００個／ｍｍ2 存在することを特徴とする溶接
作業性のよいガスシールドアーク溶接用ワイヤを提供す
るものである。この場合においても、ワイヤ表面に存在
する凹部は上記差渡し寸法範囲外のものも存在すること
があるが、前記任意の差渡し寸法が８μｍを越える凹部
が存在しないものは、特に優れている。なお、前記任意
の差渡し寸法が１μｍ未満の凹部が共存しても、溶接作
業性に対して差支えはない。Next, the invention of the method of the present invention has a depth of 1 μm.
The total length of the above surface cracks is 100 μm / mm 2 or more and 500 μm / mm 2 or less, and a recess having an arbitrary transfer dimension of 1 μm or more and 8 μm or less is formed on the surface of the product wire.
The present invention provides a wire for gas shielded arc welding having good welding workability, which is characterized by the presence of 0 to 1000 pieces / mm 2 . In this case as well, there may be some recesses existing on the surface of the wire that are out of the above-mentioned delivery dimension range, but those that do not have any recesses with an arbitrary delivery dimension exceeding 8 μm are particularly excellent. It should be noted that even if the above-mentioned arbitrary recesses having a delivery dimension of less than 1 μm coexist, there is no problem with respect to welding workability.
【００１１】なお、本発明においては、ワイヤ表面の開
口部の幅が深さ寸法以上である欠落部を凹部と称し、ワ
イヤ表面の開口部の幅が深さの１／２より小さい欠落部
を亀裂と称する。この判別は、実際には顕微鏡による表
面観察によって行うが、表面の開口部の幅や形状から断
面を観察しなくても容易に判別することができる。次に
上記本発明の溶接作業性の良いガスシールドアーク溶接
用ワイヤの製造方法は、乾式の１次伸線後のワイヤの表
面にＫ含有物をＫ換算値で０．１〜１０ｇ／ｍ2 付着さ
せた後、露点−２０℃〜０℃のＮ2 雰囲気中で温度７０
０〜９００℃で、２〜１２０分間保持し、その後、Ｃｕ
めっき、２次伸線を順次実施することを特徴とする。In the present invention, a missing portion in which the width of the opening on the wire surface is greater than or equal to the depth dimension is called a recess, and a missing portion in which the width of the opening on the wire surface is less than 1/2 of the depth is defined. It is called a crack. This determination is actually performed by observing the surface with a microscope, but it can be easily determined without observing the cross section from the width and shape of the opening on the surface. Next, in the method for producing a wire for gas shield arc welding having good welding workability according to the present invention, the content of K is 0.1 to 10 g / m 2 in terms of K in terms of K on the surface of the wire after dry primary drawing. After the deposition, the temperature is 70 in an N 2 atmosphere with a dew point of −20 ° C. to 0 ° C.
Hold at 0-900 ° C for 2-120 minutes, then Cu
It is characterized in that plating and secondary wire drawing are sequentially performed.
【００１２】上記特性を満足するために、１次伸線後、
Ｃｕメッキ間における製造条件を以下のように限定し
た。まず、溶接作業性を改造するために、焼鈍前にＫ含
有物を塗布するが、その量がＫ換算値で０．１ｇ／ｍ2
未満では、溶接作業性の改善効果がなく、１０ｇ／ｍ2
を超えるとワイヤ表面亀裂が粗大化多発し、ワイヤ変
色、錆が発生しやすくなる。そこで、Ｋ含有物の最適塗
布量としては、Ｋ換算値で、０．１ｇ／ｍ2 〜１０ｇ／
ｍ2 であることが分かった。より好ましくは、Ｋ換算値
で、０．５〜５ｇ／ｍ2 とすればよい。In order to satisfy the above characteristics, after the primary wire drawing,
The manufacturing conditions during Cu plating were limited as follows. First, in order to modify the welding workability, a K-containing material is applied before annealing, and the amount thereof is 0.1 g / m 2 in K conversion value.
If it is less than 10 g / m 2 , there is no improvement effect on the welding workability.
If it exceeds, the wire surface cracks are often coarsened, and wire discoloration and rust are likely to occur. Therefore, the optimum coating amount of the K-containing material is, in terms of K, 0.1 g / m 2 to 10 g /
It was found to be m 2 . More preferably, it may be 0.5 to 5 g / m 2 in K conversion value.
【００１３】次に、焼鈍条件であるが、露点が−２０℃
よりも低いと上記Ｋ含有物の製品への歩留りが低下し、
最終製品に十分なＫが付与されず、溶接作業性改善が認
められない。一方、露点が０℃を超えると、ワイヤ表面
亀裂が粗大化、多発し、ワイヤ変色、錆が発生しやすく
なる。そこで、最適な露点は−２０℃〜０℃であること
がわかった。Next, under the annealing conditions, the dew point is -20 ° C.
If it is lower than the above, the yield of the above K-containing product to the product decreases,
Sufficient K is not given to the final product, and no improvement in welding workability is observed. On the other hand, when the dew point exceeds 0 ° C., wire surface cracks become coarse and frequently occur, and wire discoloration and rust are likely to occur. Therefore, it was found that the optimum dew point is −20 ° C. to 0 ° C.
【００１４】焼鈍温度については、温度が７００℃未満
ではＫ含有物の製品への歩留りが低下し、溶接作業性改
善が認められない。一方温度が９００℃を超えると、ワ
イヤ表面亀裂が粗大化、多発し、ワイヤ変色、錆が発生
しやすくなる。そこで最適な焼鈍温度としては７００℃
〜９００℃であることが分かった。次に、焼鈍保持時間
については、２分間未満では、Ｋの製品への歩留りが低
下し、溶接作業性の改善が認められない。一方焼鈍保持
時間が１２０分間を超えるとワイヤ表面亀裂が粗大化、
多発し、ワイヤの変色や錆が発生しやすくなる。そこで
最適な焼鈍保持時間としては、２〜１２０分間とする。
焼鈍を連続式焼鈍炉で行う場合には、一般に長時間の焼
鈍を行うことができないので、２〜２０分程度の焼鈍保
持時間とし、その分、焼鈍温度を高めとすればよい。逆
にバッチ式焼鈍炉の場合は、焼鈍保持時間を長くして比
較的低温の焼鈍を行えばよい。Regarding the annealing temperature, if the temperature is less than 700 ° C., the yield of the K-containing product in the product decreases, and no improvement in welding workability is observed. On the other hand, if the temperature exceeds 900 ° C., wire surface cracks become coarse and frequently occur, and wire discoloration and rusting easily occur. Therefore, the optimum annealing temperature is 700 ° C.
It was found to be ~ 900 ° C. Next, if the annealing holding time is less than 2 minutes, the yield of K in the product is lowered, and no improvement in welding workability is observed. On the other hand, if the annealing holding time exceeds 120 minutes, the wire surface cracks become coarse,
Frequently occurs, and wire discoloration and rust easily occur. Therefore, the optimum annealing holding time is 2 to 120 minutes.
When annealing is carried out in a continuous annealing furnace, it is generally not possible to carry out annealing for a long time, so the annealing holding time may be set to about 2 to 20 minutes, and the annealing temperature may be raised accordingly. On the contrary, in the case of a batch type annealing furnace, annealing may be performed at a relatively low temperature by lengthening the annealing holding time.
【００１５】[0015]
【発明の実施の形態】ワイヤ送給性を良くするために、
ワイヤ表面に凹部ではなく微細な亀裂を発生させ、液状
潤滑剤を塗布したワイヤは、時間の経過と共に変色を生
じた。これに対し、本発明では１次伸線において、適切
なワイヤ表面粗度、すなわち適切な凹部の分布状態を得
て、その後、適切な条件下で、焼鈍と２次伸線を行うこ
とにより、最終製品に、適切な凹部と亀裂を形成する。
これによって、変色や錆等の問題がなく、溶接作業性の
良いガスシールドアーク溶接用ワイヤを得ることができ
た。BEST MODE FOR CARRYING OUT THE INVENTION In order to improve the wire feeding property,
The wire coated with the liquid lubricant generated fine cracks instead of recesses on the surface of the wire, and the wire discolored over time. On the other hand, in the present invention, in the primary wire drawing, by obtaining an appropriate wire surface roughness, that is, an appropriate distribution of concave portions, and then performing annealing and secondary wire drawing under appropriate conditions, Appropriate recesses and cracks are formed in the final product.
As a result, it was possible to obtain a wire for gas shield arc welding, which has no problems such as discoloration and rust and has good welding workability.
【００１６】従来のワイヤの製造方法は、有機物系主体
の潤滑剤を用い、５．５ｍｍφの鋼線を乾式で２．０〜
３．０ｍｍまで１次伸線する。次に、雰囲気を調整して
焼鈍し、表面酸化する。雰囲気はＣＯ、Ｈ2 、Ｈ2 Ｏ等
による調整を行う。この焼鈍により亀裂の素地となる粒
界酸化状態および凹部が発生する。ついでメッキを施し
た後２次伸線を行い、２．０〜３．０ｍｍφの中間径か
ら製品径０．８〜２．０ｍｍφまで伸線し製品とするも
のである。この時凹部には伸線潤滑剤が残留することに
なる。The conventional wire manufacturing method uses a lubricant mainly composed of an organic material, and a steel wire of 5.5 mmφ is dry-processed to 2.0 to
Primary wire drawing up to 3.0 mm. Next, the atmosphere is adjusted, annealing is performed, and surface oxidation is performed. The atmosphere is adjusted with CO, H 2 , H 2 O or the like. Due to this annealing, the grain boundary oxidation state and the concave portion which are the base of the crack are generated. Then, after plating, secondary wire drawing is performed, and wire drawing is performed from an intermediate diameter of 2.0 to 3.0 mmφ to a product diameter of 0.8 to 2.0 mmφ to obtain a product. At this time, the wire drawing lubricant remains in the recess.
【００１７】これに対し、本発明のワイヤは、ワイヤの
表面の粗度を上げるために乾式潤滑剤中の無機物系（石
灰石等）の比率を上げて１次伸線した後、Ｋ含有物の塗
布を行い、焼鈍し、ついでメッキを施した後脂肪酸エス
テル等を主成分とする潤滑液を用いた湿式伸線による２
次伸線を行い、２．０〜３．０ｍｍφから製品径０．８
〜２．０ｍｍφまで伸線し製品とする。On the other hand, in the wire of the present invention, in order to increase the roughness of the surface of the wire, the ratio of the inorganic material type (limestone etc.) in the dry lubricant is increased and the primary drawing is performed, and then the K-containing material is added. After coating, annealing, and then plating, wet drawing using a lubricating liquid containing a fatty acid ester as a main component 2
Next wire drawing, from 2.0 to 3.0 mmφ product diameter 0.8
Wire drawing up to ~ 2.0 mmφ to make a product.
【００１８】本発明では、１次伸線で得られた凹部を有
効に利用し、２次伸線後、製品の表面に残った凹部の寸
法及び密度をある範囲内の値とすることにより、変色や
発錆のない、送給性及び溶接作業性の良いワイヤを得る
ことができる。本発明のガスシールドアーク溶接用ワイ
ヤ表面の凹部は、表面の亀裂や、粒界酸化層によるもの
ではなく、物理的にワイヤの表面に凹部を形成したもの
であるから、これらの凹部は経時的に変色や酸化を生ず
る原因とならない。従って、経時的に発生する送給性、
溶接作業性の劣化を招来しない。In the present invention, the recesses obtained by the primary wire drawing are effectively used, and after the secondary wire drawing, the size and density of the recesses remaining on the surface of the product are set within a certain range. It is possible to obtain a wire that is free from discoloration and rusting and that has good feedability and welding workability. The recesses on the surface of the wire for gas shielded arc welding of the present invention are not formed by surface cracks or intergranular oxide layers, but physically formed recesses on the surface of the wire. It does not cause discoloration or oxidation. Therefore, the feedability that occurs over time,
Does not cause deterioration of welding workability.
【００１９】次に、本発明の方法発明について説明す
る。凹部のサイズおよび個数の規制のほかに、さらに耐
変色性、耐錆性を確実に確保するために、ワイヤ表面に
発生する亀裂の量について規制を行ったのが第２の発明
である。本発明で述べているような乾式の１次伸線で生
成されるワイヤ表面の凹部内は断面が丸みがあり、その
箇所に存在する付着物等（乾式伸線潤滑剤、水分、油
分、又は異物等）は２次伸線においてワイヤがダイスを
通過して減面加工を受ける際にほとんどが除去されてし
まうため、時間が経過してしみ出すようなことはない。
一方割れ目状のワイヤ表面亀裂では、その断面形状が非
常に尖っているために、製造した直後は亀裂内部に存在
する伸線潤滑剤、水分、油分、又は異物等がワイヤ表面
に存在せずワイヤ表面の変色、錆等に悪影響を及ぼさな
いが、時間が経過するにしたがって、亀裂内部に存在す
る付着物等（伸線潤滑剤、水分、油分、又は異物等）が
ワイヤ表面にしみ出してきてワイヤ表面の変色、錆の原
因となる。表１に、ワイヤ表面の亀裂の深さとワイヤ表
面の変色、錆の関係について調査した結果を示した。試
験条件は、直径１．２ｍｍφの銅めっきワイヤに表面塗
油した供試ワイヤを用い、３０℃、相対湿度９０％ の
雰囲気中に４８時間放置したものについて調べた。この
供試ワイヤの亀裂の延長合計は何れも３００〜４００μ
ｍ／ｍｍ2 であった。ワイヤの表面亀裂深さは、ワイヤ
の長手方向に垂直な５断面について顕微鏡で観察しすべ
ての表面亀裂の深さを測定しその個数平均を調べた。表
１中の記号は、次のとおりである。Next, the method invention of the present invention will be described. In addition to the regulation of the size and the number of the concave portions, the second invention regulates the amount of cracks generated on the wire surface in order to ensure the discoloration resistance and the rust resistance. The inside of the concave portion of the wire surface produced by dry primary wire drawing as described in the present invention has a round cross section, and the deposits (dry wire drawing lubricant, moisture, oil content, or Most of the foreign matter) is removed when the wire passes through the die and undergoes surface reduction processing in the secondary wire drawing, and therefore does not exude over time.
On the other hand, in a cracked wire surface crack, since the cross-sectional shape is very sharp, the wire drawing lubricant, moisture, oil, or foreign matter present inside the crack does not exist on the wire surface immediately after manufacturing. It does not adversely affect surface discoloration, rust, etc., but with the passage of time, deposits (drawing lubricant, water, oil, foreign matter, etc.) present inside the cracks seep out onto the wire surface. This may cause discoloration or rust on the wire surface. Table 1 shows the results of an investigation on the relationship between the depth of cracks on the wire surface and the discoloration and rust on the wire surface. The test conditions were a test wire in which a copper-plated wire having a diameter of 1.2 mmφ was surface-oiled, and the test wire was left standing in an atmosphere of 30 ° C. and 90% relative humidity for 48 hours. The total extension of cracks in this test wire was 300-400μ.
It was m / mm 2 . The surface crack depth of the wire was measured by observing five cross sections perpendicular to the longitudinal direction of the wire with a microscope, measuring the depth of all surface cracks, and examining the number average thereof. The symbols in Table 1 are as follows.
【００２０】◎ ：非常に良好（変色：全面変化なし、
錆：全面錆なし） ○ ：良好（変色：部分的に褐色、錆：部分的に軽く発
錆） Δ ：やや不良（変色：全面的に褐色、錆：部分的に発
錆大） × ：不良（変色：全面的に暗褐色、錆：全面的に発錆
大）◎: Very good (discoloration: no overall change,
Rust: No overall rust) ○: Good (discoloration: partially brown, rust: lightly rusted partially) Δ: Slightly poor (discoloration: completely brown, rust: partially rusted) ×: Poor (Discoloration: dark brown on the whole surface, rust: large rusting on the whole surface)
【００２１】[0021]
【表１】 [Table 1]
【００２２】上記悪影響を及ぼす表面亀裂としては、表
１に示すように深さ１μｍ以上のものの悪影響が顕著で
あり、ワイヤ表面の変色、錆等を防止するにはその量を
規制すれば良いことが分かる。種々試作研究を重ねた結
果、深さ１μｍ以上の表面亀裂の延長合計が、５００μ
ｍ／ｍｍ2 以下であれば、肉眼の観察では変色したと認
識されず、しかも溶接作業性も良い溶接ワイヤが得られ
ることが判明した。As the surface cracks having the above-mentioned adverse effect, as shown in Table 1, those having a depth of 1 μm or more have a remarkable adverse effect. To prevent discoloration or rust of the wire surface, the amount thereof should be regulated. I understand. As a result of various trial researches, the total extension of surface cracks with a depth of 1 μm or more was 500 μm.
It was found that if it is m / mm 2 or less, the welding wire can be obtained by visual observation without recognizing that the color has changed and the welding workability is good.
【００２３】なお、少量の表面亀裂は、理由は明確にな
っていないが、ワイヤ送給性を改善し、したがって溶接
作業性を向上させることが分かった。種々調査した結
果、深さ１μｍ以上の表面亀裂の延長合計が１００μｍ
／ｍｍ2 以上、５００μｍ／ｍｍ2 以下であれば、溶接
作業性が良く、変色、錆にも耐えられることが分かっ
た。It has been found that a small amount of surface cracks improves the wire feedability and thus the welding workability, although the reason is not clear. As a result of various investigations, the total extension of surface cracks with a depth of 1 μm or more is 100 μm.
It has been found that when the value is / mm 2 or more and 500 μm / mm 2 or less, the welding workability is good, and it can withstand discoloration and rust.
【００２４】次に、本発明の溶接作業性の良いガスシー
ルドアーク溶接用ワイヤの製造方法について説明する。
図４は、その製造工程を示すブロック図である。線材１
１をショットブラスト１２処理した後、乾式の１次伸線
１３を行う。その後、ワイヤ表面にＫ含有物を付着処理
１４する。付着量はＫ換算値で０．１〜１０ｇ／ｍ2 と
する。次いで連続焼鈍１５を行う。焼鈍条件は、露点−
２０℃〜０℃のＮ2 雰囲気中で温度７００〜９００℃
で、２〜１２０分間保持する。その後、Ｃｕめっき１
６、湿式２次伸線１７を順次実施し、塗油１８すること
によって製品の溶接用ワイヤ１９を製造する。Next, a method of manufacturing the gas shielded arc welding wire of the present invention, which has good welding workability, will be described.
FIG. 4 is a block diagram showing the manufacturing process. Wire rod 1
After subjecting 1 to shot blasting 12, dry primary wire drawing 13 is performed. Then, the K-containing material is attached 14 on the wire surface. The adhered amount is 0.1 to 10 g / m 2 in terms of K value. Then, continuous annealing 15 is performed. Annealing conditions are dew point-
Temperature 700 to 900 ° C in N 2 atmosphere of 20 ° C to 0 ° C
Hold for 2 to 120 minutes. After that, Cu plating 1
6. Wet secondary wire drawing 17 is sequentially performed, and oil 18 is applied to manufacture a welding wire 19 for a product.
【００２５】[0025]
（実施例１）図１は本発明の実施例の溶接作業性の良い
ガスシールドアーク溶接用ワイヤの表面の１例を示す１
００μｍ×１００μｍの視野の模式図である。このワイ
ヤは、成分がＣ０．０４５ｗｔ％、Ｓｉ０．７９ｗｔ
％、Ｍｎ１．６２ｗｔ％、Ｐ０．０１ｗｔ％、Ｓ０．０
０８ｗｔ％、Ｔｉ０．１８ｗｔ％、直径５．５ｍｍφの
黒皮付線材に、脱スケールのためのショットブラストを
施した後、乾式潤滑剤を用いて２．８ｍｍφに１次伸線
を行い、次いで０．５％クエン酸３カリウム＋１．２５
％炭酸カリウム水スプレーによりＫ換算で０．３ｇ／ｍ
2 程度塗布した後、焼鈍条件として、露点：−３．０℃
のＮ2 雰囲気で８３０℃で１０分間の連続焼鈍した後、
銅めっき、湿式の２次伸線を順次行って、ＪＩＳ ＹＧ
Ｗ−１１相当の直径１．６ｍｍφとした後、表面に少量
の油を塗油して製造した溶接用ワイヤである。(Embodiment 1) FIG. 1 shows an example of the surface of a wire for gas shielded arc welding having good welding workability according to an embodiment of the present invention 1
It is a schematic diagram of a visual field of 00 μm × 100 μm. The composition of this wire is C0.045wt%, Si0.79wt%
%, Mn1.62 wt%, P0.01 wt%, S0.0
A wire rod with black skin of 08 wt%, Ti 0.18 wt% and a diameter of 5.5 mmφ was shot blasted for descaling, and then primary wire drawing was performed to 2.8 mmφ using a dry lubricant, and then 0 0.5% 3 potassium citrate + 1.25
% Potassium carbonate water spray 0.3 K / m in K conversion
After applying about 2 times, as an annealing condition, dew point: -3.0 ° C
After continuous annealing at 830 ° C. for 10 minutes in N 2 atmosphere,
Copper plating and wet secondary wire drawing are performed in sequence and JIS YG
It is a welding wire produced by applying a small amount of oil to the surface after setting a diameter of 1.6 mmφ equivalent to W-11.
【００２６】この溶接用ワイヤは、表面に多数の凹部を
有する。ワイヤ長手方向に添う無作為の位置から１０個
のサンプルを採取し、その凹部の大きさ及び分布数を調
査した結果を比較例と共に表２に示した。この際幅が１
μｍ未満の凹部は除外した。上記実施例の溶接用ワイヤ
と、従来の凹部が少なく、亀裂が多い溶接用ワイヤ（比
較例）をそれぞれペイルパック巻きし、屋外に放置し、
ワイヤの変色及び錆の発生を調査した。結果を表３に示
した。変色や錆が発生すると、送給性が悪くなると共に
溶接のスパッタが多くなり溶接作業性が劣化する。This welding wire has a large number of recesses on its surface. Ten samples were taken from random positions along the longitudinal direction of the wire, and the results of examining the size and distribution number of the recesses are shown in Table 2 together with the comparative example. At this time the width is 1
Recesses less than μm were excluded. The welding wire of the above example and the conventional welding wire with few recesses and many cracks (comparative example) were each wound in a pail pack and left outdoors,
The occurrence of discoloration and rust of the wire was investigated. The results are shown in Table 3. When discoloration or rust occurs, the feedability is deteriorated and the welding spatter is increased to deteriorate the welding workability.
【００２７】次に上記実施例の溶接用ワイヤをブルドー
ザ用アーム等の産業用機械部品の溶接ロボットによる溶
接試験に供した。溶接条件は３８Ｖ、３５０Ａ、コンジ
ットケーブル長さ６ｍの条件で、従来品に比べてスパッ
タの発生が少くなく、溶接ヒュームも低減している。ま
た６ｍのコンジットケーブルでも送給性に全く問題がな
く良好な溶接作業性を示した。Next, the welding wire of the above example was subjected to a welding test by a welding robot of industrial machine parts such as a bulldozer arm. Welding conditions are 38 V, 350 A, and conduit cable length is 6 m. Compared to the conventional product, less spatter is generated and welding fume is reduced. Even with a 6 m conduit cable, there was no problem in feedability and good welding workability was exhibited.
【００２８】[0028]
【表２】 [Table 2]
【００２９】[0029]
【表３】 [Table 3]
【００３０】（実施例２）実施例１と同成分の素材を用
い、乾式１次伸線における乾式潤滑剤（主成分ステアリ
ン酸カルシウム）の組成、粒度、ダイスの形状、伸線速
度を種々変更し、Ｋ含有物の塗布量、焼鈍条件、２次伸
線条件を変化させて、種々の凹部と亀裂を有する直径
１．６ｍｍのワイヤを製作した。図３はこのようなワイ
ヤの表面を拡大して模式的に示した例である。それら多
くのワイヤの溶接作業性、変色、発錆について調べた結
果を図５、図６、図７にそれぞれ示した。差渡し寸法が
１〜８μｍの凹部の数が１００〜１０００個／ｍｍ2 、
深さ１μｍ以上の表面亀裂の延長合計が１００〜５００
μｍ／ｍｍ2 の範囲では、溶接作業性はいずれも良好で
あった。また変色及び錆については上記範囲内で良好で
あり、傾向としては差渡し寸法が１〜８μｍの凹部の数
が少なく、亀裂も少ない方が良好であった。(Example 2) Using the same materials as in Example 1, the composition, particle size, die shape, and wire drawing speed of the dry lubricant (main component calcium stearate) in dry primary wire drawing were variously changed. The coating amount of the K-containing material, the annealing condition and the secondary wire drawing condition were changed to manufacture a wire having a diameter of 1.6 mm having various recesses and cracks. FIG. 3 is an example in which the surface of such a wire is enlarged and schematically shown. The results of investigating the welding workability, discoloration, and rusting of many of these wires are shown in FIGS. 5, 6, and 7, respectively. The number of recesses having a delivery size of 1 to 8 μm is 100 to 1000 / mm 2 ,
The total extension of surface cracks with a depth of 1 μm or more is 100 to 500
In the range of μm / mm 2 , the welding workability was good. Further, discoloration and rust were good in the above range, and as a tendency, it was better that the number of recesses having a delivery dimension of 1 to 8 μm was small and the number of cracks was small.
【００３１】[0031]
【発明の効果】本発明の溶接用ワイヤは、以上のように
構成されているので、ワイヤの変色、錆の発生等の経時
的変化を生ずることなく、溶接作業性、送給性に優れた
特性を保持するという優れた効果を奏する。また本発明
方法によれば、上記要件を具備した溶接作業性に優れた
ガスシールドアーク溶接用ワイヤを製造することができ
る。Since the welding wire of the present invention is constructed as described above, it is excellent in welding workability and feedability without causing a change with time such as discoloration of the wire or generation of rust. It has an excellent effect of retaining the characteristics. Further, according to the method of the present invention, it is possible to manufacture a gas shielded arc welding wire having the above requirements and having excellent welding workability.
【図１】実施例の溶接用ワイヤの表面拡大模式図であ
る。FIG. 1 is an enlarged schematic view of the surface of a welding wire according to an embodiment.
【図２】凹部の態様の例を示す模式図である。FIG. 2 is a schematic view showing an example of a mode of a recess.
【図３】実施例の溶接用ワイヤの表面拡大模式図であ
る。FIG. 3 is an enlarged schematic view of the surface of the welding wire of the example.
【図４】実施例の溶接用ワイヤの製造工程を示すブロッ
ク図である。FIG. 4 is a block diagram showing a manufacturing process of the welding wire of the embodiment.
【図５】実施例の溶接用ワイヤの特性を示すグラフであ
る。FIG. 5 is a graph showing the characteristics of the welding wire of the example.
【図６】実施例の溶接用ワイヤの特性を示すグラフであ
る。FIG. 6 is a graph showing the characteristics of the welding wire of the example.
【図７】実施例の溶接用ワイヤの特性を示すグラフであ
る。FIG. 7 is a graph showing the characteristics of the welding wire of the example.
１ 凹部 ２，３ １個の凹部 ４ 亀裂 １１ 線材 １２ ショットブラスト １３ １次伸線 １４ Ｋ付着処理 １５ 連続焼鈍 １６ 銅めっき １７ ２次伸線 １８ 塗油 １９ 製品溶接用ワイヤ 1 recessed part 2 3 1 recessed part 4 crack 11 wire rod 12 shot blasting 13 primary wire drawing 14 K adhesion treatment 15 continuous annealing 16 copper plating 17 secondary wire drawing 18 oil coating 19 product welding wire
Claims (5)
下の凹部が製品ワイヤ表面に１００〜１０００個／ｍｍ
2 存在することを特徴とする溶接作業性のよいガスシー
ルドアーク溶接用ワイヤ。1. The product wire surface has 100 to 1000 recesses with an arbitrary delivery dimension of 1 μm or more and 8 μm or less.
2 Wires for gas shielded arc welding with good workability, characterized by being present.
凹部が存在しないことを特徴とする請求項１記載の溶接
作業性の良いガスシールドアーク溶接用ワイヤ。2. The gas shielded arc welding wire according to claim 1, wherein there are no recesses having an arbitrary delivery dimension exceeding 8 μm.
部が共存することを特徴とする請求項１又は２記載の溶
接作業性の良いガスシールドアーク溶接用ワイヤ。3. The wire for gas shielded arc welding according to claim 1, wherein the recesses having an arbitrary delivery dimension of less than 1 μm coexist.
が、１００μｍ／ｍｍ 2 以上、５００μｍ／ｍｍ2 以下
である請求項１ないし３のいずれかに記載の溶接作業性
の良いガスシールドアーク溶接用ワイヤ。4. The total extension of surface cracks with a depth of 1 μm or more.
Is 100 μm / mm 2 Above, 500 μm / mm2 Less than
The welding workability according to any one of claims 1 to 3,
Good wire for gas shielded arc welding.
有物をＫ換算値で０．１〜１０ｇ／ｍ2 付着させた後、
露点−２０℃〜０℃のＮ2 雰囲気中で温度７００〜９０
０℃で、２〜１２０分間保持し、その後、Ｃｕめっき、
２次伸線を順次実施することを特徴とする請求項１ない
し４のいずれかに記載の溶接作業性の良いガスシールド
アーク溶接用ワイヤの製造方法。5. After depositing a K-containing substance in a K-converted value of 0.1 to 10 g / m 2 on the surface of the wire after dry primary drawing,
Dew point -20 ° C to 0 ° C in N 2 atmosphere, temperature 700 to 90
Hold at 0 ° C for 2-120 minutes, then Cu plating,
The method for manufacturing a gas shielded arc welding wire with good welding workability according to any one of claims 1 to 4, wherein secondary wire drawing is sequentially performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16337796A JP3205262B2 (en) | 1995-06-30 | 1996-06-24 | Gas shielded arc welding wire with good welding workability and method of manufacturing the same |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16623995 | 1995-06-30 | ||
| JP7-166239 | 1995-06-30 | ||
| JP16337796A JP3205262B2 (en) | 1995-06-30 | 1996-06-24 | Gas shielded arc welding wire with good welding workability and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0970685A true JPH0970685A (en) | 1997-03-18 |
| JP3205262B2 JP3205262B2 (en) | 2001-09-04 |
Family
ID=26488828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16337796A Expired - Fee Related JP3205262B2 (en) | 1995-06-30 | 1996-06-24 | Gas shielded arc welding wire with good welding workability and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3205262B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998043776A1 (en) * | 1997-03-31 | 1998-10-08 | Nippon Steel Welding Products & Engineering Co., Ltd. | Method of production of welding wire |
| KR100416278B1 (en) * | 2001-04-02 | 2004-01-31 | 고려용접봉 주식회사 | Arc welding wire |
| US6989510B2 (en) | 2002-03-04 | 2006-01-24 | Kiswel Ltd. | Non-copper-plated solid wire for carbon dioxide gas shielded arc welding |
| JP2006315059A (en) * | 2005-05-13 | 2006-11-24 | Kobe Steel Ltd | Copper-plated solid wire for arc welding |
| US8901455B2 (en) | 2008-06-18 | 2014-12-02 | Lincoln Global, Inc. | Welding wire for submerged arc welding |
| US8952295B2 (en) | 2008-06-18 | 2015-02-10 | Lincoln Global, Inc. | Welding wire with perovskite coating |
-
1996
- 1996-06-24 JP JP16337796A patent/JP3205262B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998043776A1 (en) * | 1997-03-31 | 1998-10-08 | Nippon Steel Welding Products & Engineering Co., Ltd. | Method of production of welding wire |
| US6079243A (en) * | 1997-03-31 | 2000-06-27 | Nippon Steel Welding Products & Engineering Co., Ltd. | Method of production of welding wire |
| CN1080617C (en) * | 1997-03-31 | 2002-03-13 | 日铁溶接工业株式会社 | Method of production of welding wire |
| KR100416278B1 (en) * | 2001-04-02 | 2004-01-31 | 고려용접봉 주식회사 | Arc welding wire |
| US6989510B2 (en) | 2002-03-04 | 2006-01-24 | Kiswel Ltd. | Non-copper-plated solid wire for carbon dioxide gas shielded arc welding |
| SG124251A1 (en) * | 2002-03-04 | 2006-08-30 | Kiswel Ltd | Non-copper-plated solid wire for carbon dioxide gas shielded arc welding |
| JP2006315059A (en) * | 2005-05-13 | 2006-11-24 | Kobe Steel Ltd | Copper-plated solid wire for arc welding |
| US8901455B2 (en) | 2008-06-18 | 2014-12-02 | Lincoln Global, Inc. | Welding wire for submerged arc welding |
| US8952295B2 (en) | 2008-06-18 | 2015-02-10 | Lincoln Global, Inc. | Welding wire with perovskite coating |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3205262B2 (en) | 2001-09-04 |
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