JP2711069B2 - Low hydrogen coated arc welding rod - Google Patents
Low hydrogen coated arc welding rodInfo
- Publication number
- JP2711069B2 JP2711069B2 JP6069033A JP6903394A JP2711069B2 JP 2711069 B2 JP2711069 B2 JP 2711069B2 JP 6069033 A JP6069033 A JP 6069033A JP 6903394 A JP6903394 A JP 6903394A JP 2711069 B2 JP2711069 B2 JP 2711069B2
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- alloy
- arc welding
- welding rod
- coated arc
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Description
【０００１】[0001]
【産業上の利用分野】本発明は低水素系被覆アーク溶接
棒に関し、特に、低温用アルミキルド鋼、２.５〜３.５
％Ｎi鋼及び高張力鋼等の溶接に適用して、良好な作業
性と健全かつ高靭性・高延性な溶接金属が得られる低水
素系被覆アーク溶接棒に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-hydrogen coated arc welding rod, and more particularly to an aluminum-killed steel for low temperatures, 2.5 to 3.5.
The present invention relates to a low-hydrogen coated arc welding rod which can be applied to welding of high-strength steel and high-% Ni steel to obtain good workability and a healthy, high-toughness, high-ductility weld metal.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】これま
で、低温用鋼や高張力鋼用の被覆アーク溶接に関しては
多くの発明事例が報告されている。それらの殆どは高靭
性材料に関するもので、Ｎi系溶材、Ｔi−Ｂ系溶材等が
例として挙げられる。2. Description of the Related Art A number of inventions have been reported in the field of coated arc welding for low-temperature steel and high-strength steel. Most of them relate to high toughness materials, and examples thereof include Ni-based materials and Ti-B-based materials.
【０００３】しかし、上記鋼材用溶接金属が高靭性を有
すること自体好ましいことではあるが、これら鋼材の溶
接においても、一般の鋼材の場合と変わらず、むしろ、
破壊力学的観点からは、それ以上に局部的に「欠陥の防
止」、「高延性」であることがより重要な課題と云え
る。[0003] However, although it is preferable that the above-mentioned weld metal for steel has high toughness, the welding of these steels is not different from the case of ordinary steels.
From a fracture mechanics point of view, it is more important to be more "locally preventing defects" and "high ductility".
【０００４】「欠陥の防止」については多くの提案がな
され実用化されているが、溶接凝固偏析及びそれに起因
する品質低下の問題については殆ど例がみられず、特開
昭５７−８１９９７号が散見される程度である。Many proposals have been made for "prevention of defects", and practical use has been made. However, there is hardly any example of the problem of weld solidification segregation and the problem of quality deterioration resulting therefrom. It is only occasionally seen.
【０００５】特開昭５７−８１９９７号では、マクロ偏
析の問題をとりあげ、添加合金の粒度を限定することに
よってマクロ偏析が緩和されることが提案されている。
しかし、マクロ偏析が皆無となっていないこと、高電流
下向溶接という比較的偏析が生じ難い特定条件下のみの
検討であること、靭性と延性両面からの検討がなされて
いないこと等、課題が残されている。JP-A-57-81997 addresses the problem of macro-segregation, and proposes that macro-segregation is mitigated by limiting the grain size of the added alloy.
However, issues such as the absence of macro-segregation at all, studies only under specific conditions where high-current downward welding is relatively unlikely to occur, and studies on both toughness and ductility have not been made. Is left.
【０００６】一方、被覆剤にＮiを含有させて得られる
溶接金属において曲げ試験時の微小割れの発生、及び引
張試験時の伸びの低下等の問題が現在もしばしば認めら
れる。この問題は、Ｎiのマクロ偏析によるものと推定
され、Ｎiを心線添加型とすれば解決し得ると思われる
が、反面、溶材の大幅なコストアップ及び作業性の劣化
(棒焼けを生じて欠陥が発生しやすくなること)を生じ、
実用困難な状況にある。On the other hand, problems such as the occurrence of microcracks during a bending test and a decrease in elongation during a tensile test are frequently observed in weld metals obtained by adding Ni to a coating agent. This problem is presumed to be caused by the macrosegregation of Ni, and it is thought that it can be solved by using Ni as the core-added type.
(Prone to defects due to burning of the bar)
Practical difficult situation.
【０００７】本発明は、上述の従来技術の問題点を解決
すべく、被覆剤からのＮiの添加形態にしても、良好な
作業性と健全かつ高靭性・高延性な溶接金属が得られる
低水素系被覆アーク溶接棒を提供することを目的として
いる。[0007] In order to solve the above-mentioned problems of the prior art, the present invention has a low workability which can provide good workability and a sound, high toughness, high ductility weld metal even when Ni is added from a coating agent. An object of the present invention is to provide a hydrogen-coated arc welding rod.
【０００８】[0008]
【課題を解決するための手段】前記課題を解決するため
の手段として、本発明は、鋼心線外周に被覆剤を塗布し
てなる低水素系被覆アーク溶接棒であって、該被覆剤
が、被覆剤重量％で、ＣaＣＯ3、ＭgＣＯ3、ＢaＣＯ3の
うち１種又は２種以上：２５〜５５％、ＣaＦ2：２〜３
０％、Ｓi：２〜９％、ＴiＯ2：２〜８％、Ｎi及び／又
はＮi合金(Ｎi換算量)：１〜１４％、を含有すると共
に、Ｎi及び／又はＮi合金の粒度が、Ｎi及び／又はＮi
合金の全重量％で、１４９μm以上、２５０μm未満の粒
が１０％以下、２５０μm以上の粒を実質的に含まず、
かつ、Ｎi及び／又はＮi合金の成分組成が、Ｎi及び／
又はＮi合金の全重量％で、Ｐ≦０.００７％、Ｃ≦０.
０２％、であることを特徴とする低水素系被覆アーク溶
接棒を要旨としている。Means for Solving the Problems As a means for solving the above-mentioned problems, the present invention relates to a low hydrogen-based coated arc welding rod obtained by applying a coating agent on the outer periphery of a steel core wire, wherein the coating agent is used. One or more of CaCO 3 , MgCO 3 , and BaCO 3 in weight% of coating agent: 25 to 55%; CaF 2 : 2 to 3
0%, Si: 2~9%, TiO 2: 2~8%, Ni and / or Ni alloy (Ni equivalent amount): 1-14%, with contains, the particle size of the Ni and / or Ni alloy, Ni and / or Ni
149 μm or more and less than 250 μm particles are not more than 10% and substantially free of particles of 250 μm or more in the total weight% of the alloy,
The composition of the Ni and / or Ni alloy is Ni and / or Ni.
Alternatively, P ≦ 0.007% and C ≦ 0.00 in the total weight% of the Ni alloy.
The present invention provides a low-hydrogen-based coated arc welding rod characterized in that the ratio is 02%.
【０００９】[0009]
【作用】以下に本発明を更に詳述する。The present invention will be described below in more detail.
【００１０】本発明の基本的な材料設計思想は、以下の
とおりである。すなわち、本発明者らは、被覆剤からの
Ｎiの添加形態を検討した結果、マクロ偏析は低電流域
での溶接でより生じ易いこと(溶滴が大きい方が生じ易
い)、全姿勢での溶接アーク現象を考慮するとマクロ偏
析を皆無にすることは困難なこと、しかし、マクロ偏析
を生じたとしても品質が劣化しない被覆剤の成分領域が
存在することを見い出した。The basic material design concept of the present invention is as follows. That is, the present inventors have examined the addition form of Ni from the coating agent, and found that macrosegregation is more likely to occur in welding in a low current range (larger droplets are more likely to occur), and in all postures. Taking into account the welding arc phenomenon, it was difficult to eliminate macrosegregation at all, but it was found that there was a component region of the coating material that did not deteriorate in quality even if macrosegregation occurred.
【００１１】そして、低電流域での溶接の場合も含めて
マクロ偏析を極力防止するためにはＮi或いはＮi合金粉
における１４９μm以上２５０μm未満の粒子を１０％以
下、及び２５０μm以上の粒子を実質的に含まないとす
ること(図１参照)が、また、偏析部の靭性・延性低下を
防止するためにはＮi或いはＮi合金粉のＰ含有量を０.
００７％以下、Ｃ含有量を０.０２％以下に保つこと(図
２参照)が、それぞれ有効であることを見い出したもの
である。In order to prevent macro-segregation as much as possible, including in the case of welding in a low current range, particles of Ni or Ni alloy powder having a particle size of 149 μm or more and less than 250 μm are reduced to 10% or less, and particles of 250 μm or more are substantially reduced. (See FIG. 1), and the P content of Ni or Ni alloy powder should be set to 0.
It has been found that keeping the C content at 007% or less and the C content at 0.02% or less (see FIG. 2) is effective.
【００１２】この知見に基づいて更に詳細な実験研究を
重ねて、所期の目的を達成できる低水素系被覆アーク溶
接棒を完成したものである。次に、各成分の作用効果に
ついて説明する。なお、成分含有量は被覆剤全重量％で
ある。Based on this knowledge, further detailed experimental research has been completed, and a low hydrogen-based coated arc welding rod which can achieve the intended purpose has been completed. Next, the function and effect of each component will be described. The component content is the total weight of the coating agent.
【００１３】ＣaＣＯ3、ＢaＣＯ3、ＭgＣＯ3の１種又は
２種以上：２５〜５５％ ＣaＣＯ3、ＢaＣＯ3、ＭgＣＯ3はいずれも炭酸塩として
同効物質であり、溶接中に分解してＣＯ2を発生し、シ
ールド効果を有する。しかし、２５％未満ではその効果
がなくなり、また５５％を超えるとスパッタが多発する
ようになる。[0013] CaCO 3, BaCO 3, MgCO 3 1 or two or more of: 25~55% CaCO 3, BaCO 3 , MgCO 3 have the same effect substance either as carbonate, CO decompose during welding Generates 2 and has a shielding effect. However, if it is less than 25%, the effect is lost, and if it exceeds 55%, spattering occurs frequently.
【００１４】ＣaＦ2：２〜３０％ ＣaＦ2は耐気孔性を維持するために不可欠の成分であ
り、スラグ剤としても作用する。しかし、２％未満では
耐気孔性が劣化し、また３０％を超えるとアークが不安
定となって上向溶接が困難となる。CaF 2 : 2 to 30% CaF 2 is an essential component for maintaining the porosity resistance, and also acts as a slag agent. However, if it is less than 2%, the porosity is deteriorated, and if it exceeds 30%, the arc becomes unstable and it becomes difficult to perform upward welding.
【００１５】Ｓi：２〜９％ Ｓiは塩基性スラグ系において有効な脱酸剤である。し
かし、２％未満では母材への融合性が劣化して立向溶接
が困難となり、また９％を超えると靭性が低下するよう
になる。Ｓiは通常、Ｆe−Ｓi或いはＦe−Ｓi−Ｂ等の
鉄合金の形で添加する。Si: 2 to 9% Si is an effective deoxidizer in a basic slag system. However, if it is less than 2%, the fusibility with the base material is deteriorated, and it becomes difficult to perform vertical welding. If it exceeds 9%, the toughness is reduced. Si is usually added in the form of an iron alloy such as Fe-Si or Fe-Si-B.
【００１６】ＴiＯ2：２〜８％ ＴiＯ2は全姿勢、特に立向溶接での作業性を維持するた
めのスラグ剤であるが、２％未満では立向・上向溶接が
むずかしくなり、また８％を超えると粘性が過多となっ
て融合性が劣化する。TiO 2 : 2 to 8% TiO 2 is a slag agent for maintaining workability in all postures, especially in vertical welding, but if it is less than 2%, vertical / upward welding becomes difficult. If it exceeds 8%, the viscosity becomes excessive and the fusibility deteriorates.
【００１７】Ｎi及び／又はＮi基合金(Ｎi換算量)：１
〜１４％ Ｎiは耐力向上、或いは低温靭性の改善に極めて有効な
成分である。しかし、１％未満ではその効果が小さく、
また１４％を超えると粘度を調整しても偏析個数が著し
く増加する。Ｎi成分は通常、金属Ｎi粉、或いはＮi−
Ｍg等のＮi合金粉で添加する。Ni and / or Ni-based alloy (Ni conversion amount): 1
１４14% Ni is a very effective component for improving proof stress or low-temperature toughness. However, if it is less than 1%, the effect is small,
On the other hand, if it exceeds 14%, the number of segregation will increase significantly even if the viscosity is adjusted. The Ni component is usually composed of metallic Ni powder or Ni-
It is added with Ni alloy powder such as Mg.
【００１８】Ｎi及び／又はＮi合金の粘度：図１は被覆
剤中の種々のＮi含有量におけるＮi粉中の粗粒物(１４
９μm以上)の割合と溶接金属中の偏析数の関係を調べた
結果である。試験板としてアルミキルド鋼(板厚２０m
m、６０゜Ｖ開先)を用い、溶接電流が１３０Ａ(立向)及
び１８０Ａ(下向)の溶接条件で得られた溶接金属につい
て偏析数を調べた(溶接断面数１０)。図１に示すよう
に、１４９μm以上の粒が１０％を超えると偏析個数が
急激に増加する。したがって、１４９μm以上の粒を１
０％以下とする。また、２５０μm以上の粒については
偏析現象を考慮して実質的に含まないようにする。な
お、実質的に含まないとは、Ｎi及び／又はＮi合金全重
量％で０.１％以下を意味する。Viscosity of Ni and / or Ni alloy: FIG. 1 shows coarse particles (14) in Ni powder at various Ni contents in the coating.
9 is a result of examining the relationship between the ratio (9 μm or more) and the number of segregation in the weld metal. Aluminum killed steel (sheet thickness 20m)
m, 60 ° V groove), the segregation number was examined for the weld metal obtained under the welding conditions of the welding current of 130 A (vertical) and 180 A (downward) (the number of welding sections was 10). As shown in FIG. 1, when the number of grains having a size of 149 μm or more exceeds 10%, the number of segregation sharply increases. Therefore, particles of 149 μm or more
0% or less. Further, particles having a size of 250 μm or more are not substantially contained in consideration of a segregation phenomenon. The phrase “substantially not contained” means 0.1% or less in total weight percent of Ni and / or Ni alloy.
【００１９】Ｎi及び／又はＮi合金の成分組成：図２は
Ｎi粉中のＰ量〔Ｐ〕、Ｃ量〔Ｃ〕と割れ発生数の関係
を調べた結果である。図２に示すように、〔Ｐ〕或いは
〔Ｃ〕が限界値を超えると、曲げ試験において偏析部を
起点とした微小割れが発生するようになり、また伸びも
低下して延性が劣化する。したがって、Ｎi粉又はＮi合
金粉中、それぞれ〔Ｐ〕≦０.００７％、〔Ｃ〕≦０.０
２％とする。FIG. 2 shows the result of examining the relationship between the P content [P] and C content [C] in Ni powder and the number of cracks generated. As shown in FIG. 2, when [P] or [C] exceeds the limit value, microcracks starting from the segregated portion occur in the bending test, and the elongation is reduced to deteriorate the ductility. Therefore, in Ni powder or Ni alloy powder, [P] ≦ 0.007% and [C] ≦ 0.0, respectively.
2%.
【００２０】以上の成分を必須とするほか、母材の鋼
種、溶接金属の特性、作業性等々を考慮して以下の成分
を適宜被覆剤中に添加することができる。In addition to making the above components indispensable, the following components can be appropriately added to the coating agent in consideration of the steel type of the base material, the properties of the weld metal, workability, and the like.
【００２１】他の脱酸剤：Ｍnは心線からも添加できる
が、被覆剤に添加する場合には２〜６％の範囲が好まし
い。６％を超えると著しく硬化して靱性が低下するよう
になる。Ｍnは通常、金属Ｍn或いはＦe−Ｍnの形で添加
される。Ｔiも有効な脱酸剤で、特にＴiＢ系溶接金属を
必要とする場合に添加でき、３％以下の範囲が好まし
い。３％を超えると固溶Ｔiを多く生成して靱性が急激
に劣化する。Ｔiは通常、Ｆe−Ｔiで添加される。その
他、Ａl、Ｍg等も用途に応じて添加できるが、添加量は
それぞれ３％以下が好ましい。Other deoxidizing agents: Mn can be added also from the core wire, but when added to the coating agent, the range is preferably 2 to 6%. If it exceeds 6%, it hardens significantly and the toughness is reduced. Mn is usually added in the form of metal Mn or Fe-Mn. Ti is also an effective deoxidizing agent and can be added particularly when a TiB-based weld metal is required, and a range of 3% or less is preferable. If it exceeds 3%, a large amount of solid solution Ti is generated and the toughness is rapidly deteriorated. Ti is usually added as Fe-Ti. In addition, Al, Mg, etc. can be added according to the application, but the addition amount is preferably 3% or less.
【００２２】なお、脱酸剤については、Ｓiの場合も含
めて、その原料粉の粒度は特に規定しない。この理由
は、脱酸剤そのものが酸素との親和力が大きいため、凝
固直前でのマクロ偏析を生じ難いことによる。With respect to the deoxidizing agent, the particle size of the raw material powder including Si is not particularly specified. The reason for this is that the deoxidizing agent itself has a high affinity for oxygen, so that macrosegregation immediately before solidification is unlikely to occur.
【００２３】他の合金成分：強度或いは靱性向上のため
に、Ｂ、Ｃr、Ｍo等の合金を被覆剤に添加できる。Ｂは
Ｔi−Ｂ系溶接金属を形成する場合に利用できるが、添
加量は０.３％以下が望ましい。Ｂは通常、Ｆe−Ｓi−
ＢやＢ酸化物の形で添加される。また、Ｃr或いはＭoは
高張力鋼用溶接金属を形成する場合に有効で、被覆剤に
添加する場合は、それぞれ３.５％以下、２％以下が望
ましい。これらは通常、金属粉や合金粉(鉄合金など)の
形で添加されるが、原料粒度に関しては、Ｎi又はＮi合
金粉と同様の配慮が好ましい。Other alloy components: An alloy such as B, Cr, or Mo can be added to the coating material to improve the strength or toughness. B can be used when forming a Ti-B-based weld metal, but the addition amount is desirably 0.3% or less. B is usually Fe-Si-
It is added in the form of B or B oxide. Further, Cr or Mo is effective in forming a weld metal for high-tensile steel, and when added to a coating agent, it is desirably 3.5% or less and 2% or less, respectively. These are usually added in the form of a metal powder or an alloy powder (such as an iron alloy), but with regard to the raw material particle size, the same considerations as for Ni or Ni alloy powder are preferable.
【００２４】なお、心線に関しては、母材の鋼種、溶接
金属の成分組成等々を考慮して適当な成分組成の鋼心線
を使用すればよい。一例として、ＪＩＳ Ｇ３５０３(被
覆アーク溶接棒心線用線材)、同Ｇ３５２３(被覆アーク
溶接棒用心線)などである。As for the core wire, a steel core wire having an appropriate component composition may be used in consideration of the steel type of the base material, the component composition of the weld metal, and the like. Examples thereof include JIS G3503 (wire for coated arc welding rod), and G3523 (wire for coated arc welding rod).
【００２５】次に本発明の実施例を示す。Next, examples of the present invention will be described.
【００２６】[0026]
【実施例】表１、表２に示す成分組成の被覆剤を炭素鋼
心線(４.０mmφ×４００mm長)の外周に塗布して低水素
系被覆アーク溶接棒を作製し、低電流立向溶接にて試験
を実施した。試験板は表３に示す鋼種で板厚２０mm、６
０゜Ｖ開先とし、溶接パラメータとしては、１３０Ａ−
２２Ｖ、溶接入熱としては３０〜３５ＫＪ／cmを採用し
た。EXAMPLE A coating agent having the composition shown in Tables 1 and 2 was applied to the outer periphery of a carbon steel core wire (4.0 mmφ × 400 mm length) to produce a low hydrogen-based coated arc welding rod, and a low current standing electrode was prepared. The test was performed by welding. The test plate is a steel type shown in Table 3 with a plate thickness of 20 mm, 6
0 ゜ V groove, 130A-
22 V, and a welding heat input of 30 to 35 KJ / cm was employed.
【００２７】試験結果は表３に示す。その概要をまとめ
ると以下のとおりである。The test results are shown in Table 3. The summary is as follows.
【００２８】溶接棒Ｎo.１〜９は本発明例であり、それ
ぞれ、対象とする鋼材に匹敵する十分な強度、靱性、延
性(伸び、曲げ性能)を示し、割れ発生がなく良好な作業
性を示している。The welding rods Nos. 1 to 9 are examples of the present invention, each exhibiting sufficient strength, toughness, and ductility (elongation and bending performance) comparable to the target steel material, and exhibiting good workability without cracking. Is shown.
【００２９】一方、溶接棒Ｎo.１０〜１５は比較例であ
り、まずＮo.１０は、Ｎi粉中の〔Ｃ〕が高いために伸
びが低下し、曲げ試験において微小割れが発生してい
る。Ｎo.１１、１２は、Ｎi粉中の〔Ｐ〕が高いために
曲げ試験において微小割れが発生し、伸びも低下した。
Ｎo.１３、１４、１５は、Ｎi粉又はＮi合金粉中の粗粒
物が多い例で、いずれも曲げ試験において微小な割れが
発生し、伸びも一部低下して、延性が劣化する傾向を示
している。On the other hand, welding rods No. 10 to 15 are comparative examples. First, in No. 10, the elongation is reduced due to the high [C] in the Ni powder, and microcracks are generated in the bending test. . In Nos. 11 and 12, fine cracks occurred in the bending test due to the high [P] in the Ni powder, and the elongation also decreased.
Nos. 13, 14, and 15 are examples of large amounts of coarse particles in Ni powder or Ni alloy powder. In all cases, microcracks occur in the bending test, elongation partially decreases, and ductility tends to deteriorate. Is shown.
【００３０】[0030]
【表１】 [Table 1]
【００３１】[0031]
【表２】 [Table 2]
【００３２】[0032]
【表３】 [Table 3]
【００３３】[0033]
【発明の効果】以上詳述したように、本発明によれば、
アルミキルド鋼、２.５〜３.５％Ｎi鋼、高張力鋼等の
溶接において、良好な作業性と靱性・延性の優れた高品
質な溶接金属が得られる。また低電流域での溶接或いは
全姿勢溶接で同様の効果が得られ、しかも特殊な心線を
必要としないので安価であり、その効果は顕著である。As described in detail above, according to the present invention,
In welding aluminum-killed steel, 2.5-3.5% Ni steel, high-tensile steel, etc., a high-quality weld metal with good workability and excellent toughness and ductility can be obtained. The same effect can be obtained by welding in a low current range or welding in all positions. In addition, since a special core wire is not required, the cost is low and the effect is remarkable.
【図１】被覆剤中の種々のＮi含有量におけるＮi粉中の
粗粒物(１４９μm以上)の割合と溶接金属中の偏析数の
関係を示す図である。FIG. 1 is a graph showing the relationship between the ratio of coarse particles (149 μm or more) in Ni powder and the number of segregation in weld metal at various Ni contents in a coating agent.
【図２】Ｎi粉中のＰ量〔Ｐ〕、Ｃ量〔Ｃ〕と割れ発生
数の関係を示す図である。FIG. 2 is a diagram showing the relationship between the P content [P] and C content [C] in Ni powder and the number of cracks generated.
フロントページの続き (72)発明者 原 則行 神奈川県藤沢市宮前字裏河内100番１株 式会社神戸製鋼所藤沢事業所内 (56)参考文献 特開 昭63−144895（ＪＰ，Ａ) 特開 昭57−81997（ＪＰ，Ａ) 特開 昭54−102254（ＪＰ，Ａ) 特開 昭53−9250（ＪＰ，Ａ) 特公 昭41−7207（ＪＰ，Ｂ１) 特公 昭63−58077（ＪＰ，Ｂ２)Continuation of the front page (72) Inventor Noriyuki Hara 100-1 Urakawachi, Miyama-ji, Fujisawa-shi, Kanagawa Prefecture Kobe Steel, Ltd. Fujisawa Works (56) References JP-A-63-144895 (JP, A) JP-A Sho 57-81997 (JP, A) JP-A-54-102254 (JP, A) JP-A-53-9250 (JP, A) JP-B-41-7207 (JP, B1) JP-B-63-58077 (JP, A) B2)
Claims (1)
素系被覆アーク溶接棒であって、該被覆剤が、被覆剤重
量％で、 ＣaＣＯ3、ＭgＣＯ3、ＢaＣＯ3のうち１種又は２種以
上：２５〜５５％、 ＣaＦ2：２〜３０％、 Ｓi：２〜９％、 ＴiＯ2：２〜８％、 Ｎi及び／又はＮi合金(Ｎi換算量)：１〜１４％、を含
有すると共に、 Ｎi及び／又はＮi合金の粒度が、Ｎi及び／又はＮi合金
の全重量％で、 １４９μm以上、２５０μm未満の粒が１０％以下、 ２５０μm以上の粒を実質的に含まず、 かつ、 Ｎi及び／又はＮi合金の成分組成が、Ｎi及び／又はＮi
合金の全重量％で、 Ｐ≦０.００７％、 Ｃ≦０.０２％、であることを特徴とする低水素系被覆
アーク溶接棒。1. A low-hydrogen coated arc welding rod obtained by applying a coating agent on the outer periphery of a steel core wire, wherein the coating agent is one of CaCO 3 , MgCO 3 , and BaCO 3 in coating weight%. species or two or more: 25~55%, CaF 2: 2~30 %, Si: 2~9%, TiO 2: 2~8%, Ni and / or Ni alloy (Ni equivalent amount): 1-14% And the particle size of the Ni and / or Ni alloy is 149 μm or more and less than 250 μm in 10% or less, and substantially free of particles of 250 μm or more in total weight% of Ni and / or Ni alloy. And the component composition of Ni and / or Ni alloy is Ni and / or Ni
A low-hydrogen coated arc welding rod, wherein P ≦ 0.007% and C ≦ 0.02% in total weight% of the alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6069033A JP2711069B2 (en) | 1994-03-14 | 1994-03-14 | Low hydrogen coated arc welding rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6069033A JP2711069B2 (en) | 1994-03-14 | 1994-03-14 | Low hydrogen coated arc welding rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07251294A JPH07251294A (en) | 1995-10-03 |
| JP2711069B2 true JP2711069B2 (en) | 1998-02-10 |
Family
ID=13390870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6069033A Expired - Lifetime JP2711069B2 (en) | 1994-03-14 | 1994-03-14 | Low hydrogen coated arc welding rod |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2711069B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012143809A (en) * | 2011-01-14 | 2012-08-02 | Nippon Steel & Sumikin Welding Co Ltd | Ni POWDER FOR COVERED ARC WELDING ELECTRODE, AND LOW-HYDROGEN TYPE COVERED ARC WELDING ELECTRODE |
| CN103921017B (en) * | 2014-04-25 | 2016-03-16 | 湖北船王特种焊材有限公司 | A kind of welding rod supporting containing Ni low-temperature steel |
| JP6399983B2 (en) * | 2015-08-28 | 2018-10-03 | 株式会社神戸製鋼所 | Flux-cored wire for gas shielded arc welding |
| CN105081613B (en) * | 2015-09-30 | 2017-05-31 | 四川大西洋焊接材料股份有限公司 | A kind of ultralow temperature steel nickel-base welding rod and preparation method thereof |
| CN114905187B (en) * | 2022-04-29 | 2023-01-31 | 燕山大学 | Low-hydrogen type welding rod applicable to austenitic light steel and preparation method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS539250A (en) * | 1976-07-14 | 1978-01-27 | Kobe Steel Ltd | Covered electrodes |
| JPS591155B2 (en) * | 1978-01-31 | 1984-01-10 | 株式会社神戸製鋼所 | coated arc welding rod |
| JPS5922633B2 (en) * | 1980-11-07 | 1984-05-28 | 株式会社神戸製鋼所 | Low hydrogen coated arc welding rod |
| JPS6358077A (en) * | 1986-08-29 | 1988-03-12 | 株式会社東芝 | Refrigerator |
| JPS63144895A (en) * | 1986-12-09 | 1988-06-17 | Kobe Steel Ltd | Low hydrogen type coated electrode |
-
1994
- 1994-03-14 JP JP6069033A patent/JP2711069B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07251294A (en) | 1995-10-03 |
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