JPH07155989A - Flux cored wire for welding fillet joint of different materials and its procedure method - Google Patents
Flux cored wire for welding fillet joint of different materials and its procedure methodInfo
- Publication number
- JPH07155989A JPH07155989A JP32625293A JP32625293A JPH07155989A JP H07155989 A JPH07155989 A JP H07155989A JP 32625293 A JP32625293 A JP 32625293A JP 32625293 A JP32625293 A JP 32625293A JP H07155989 A JPH07155989 A JP H07155989A
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- flux
- welding
- cored wire
- wire
- fillet
- Prior art date
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- Nonmetallic Welding Materials (AREA)
- Arc Welding In General (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ステンレス鋼と炭素鋼
の異材すみ肉溶接用フラックス入りワイヤ及び施工方法
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flux-cored wire for welding fillets of dissimilar materials of stainless steel and carbon steel, and a construction method.
【０００２】[0002]
【従来の技術及び解決しようとする課題】造船のよう
に、長尺な溶接箇所が生じる溶接構造物においては、従
来、被覆アーク溶接、サブマージアーク溶接、及びスラ
グタイプのフラックス入りワイヤを使うガスシールドア
ーク溶接が使用されてきた。更に近年では、能率の向上
を目的として、サブマージアーク溶接や、スラグタイプ
のフラックス入りワイヤを用いたガスシールドアーク溶
接の適用が主流となってきている。2. Description of the Related Art Conventionally, in a welded structure such as a shipbuilding where a long welding spot occurs, a shielded arc welding, a submerged arc welding, and a gas shield using a slag type flux-cored wire. Arc welding has been used. Furthermore, in recent years, application of submerged arc welding or gas shielded arc welding using a slag type flux-cored wire has become mainstream for the purpose of improving efficiency.
【０００３】その中でＳＵＳ３０４Ｌ、３１６Ｌのよう
なステンレス鋼と炭素鋼の異材溶接用材料としては、母
材の希釈による溶接金属の組成変化及び高温割れ防止を
考慮して、例えば、被覆アーク溶接或いはフラックス入
りワイヤを使うガスシールドアーク溶接では、３０９
系、３０９Ｍo系或いは３０９ＭoＬ系が使用され、サブ
マージアーク溶接では３１２系の溶接材料が使用されて
いる。Among them, as materials for welding dissimilar materials of stainless steel and carbon steel such as SUS304L and 316L, in consideration of composition change of weld metal due to dilution of base material and prevention of hot cracking, for example, coated arc welding or 309 for gas shielded arc welding using flux-cored wire
System, 309Mo system or 309MoL system is used, and in the submerged arc welding, 312 series welding material is used.
【０００４】しかしながら、殊に上述のような異材料の
すみ肉溶接の場合、サブマージアーク溶接では、入熱が
高く、かつ母材部に対する溶込みが大きいことから、ル
ート部の溶込み不良は生じにくいものの、高温割れや低
温割れが発生し易い問題があった。However, particularly in the case of fillet welding of dissimilar materials as described above, in submerged arc welding, since the heat input is high and the penetration into the base material is large, defective penetration at the root portion occurs. Although difficult, there was a problem that hot cracking and cold cracking were likely to occur.
【０００５】一方、スラグタイプのフラックス入りワイ
ヤを使うガスシールドアーク溶接では、溶込みが浅く、
継手ルート部に溶込み不良が生じ易いなどの問題があっ
た。On the other hand, in gas shielded arc welding using a slag type flux-cored wire, the penetration is shallow,
There was a problem that penetration failure was likely to occur at the joint root.
【０００６】このような事情から、高能率で、かつ高
温、低温割れの発生が少なく、健全なルート部の溶込み
が得られる異材すみ肉溶接用の溶接材料及び溶接方法の
開発が望まれているのが実情である。Under these circumstances, it is desired to develop a welding material and welding method for fillet welding of dissimilar materials, which is highly efficient, has little occurrence of high temperature and low temperature cracks, and can achieve sound penetration of the root portion. The reality is that
【０００７】本発明は、かゝる事情のもとで、ステンレ
ス鋼と炭素鋼の異材すみ肉溶接において、健全なすみ肉
継手が高効率で得られる溶接材料並びに溶接施工方法を
提供することを目的とするものである。Under such circumstances, the present invention provides a welding material and a welding construction method capable of obtaining a sound fillet joint with high efficiency in fillet welding of dissimilar materials of stainless steel and carbon steel. It is intended.
【０００８】[0008]
【課題を解決するための手段】本発明者は、前記課題を
解決するため、適正な溶込みが得られ、融合不良、高温
割れ、低温割れの発生を防止する方法として、フラック
ス入りワイヤの中でも金属粉を主体とするメタルタイプ
のフラックス入りワイヤに着目し、解決し得ることを見
出し、ここに本発明をなしたものである。In order to solve the above-mentioned problems, the present inventor has found that among the flux-cored wires, as a method of obtaining proper penetration and preventing fusion failure, hot cracking and cold cracking. The present invention has been made here by focusing on a metal-type flux-cored wire mainly composed of metal powder and finding out that a solution is possible.
【０００９】すなわち、本発明は、金属外皮中にフラッ
クスを充填してなるフラックス入りワイヤにおいて、フ
ラックス中の酸化物、弗化物及び炭酸塩の合計をワイヤ
全重量に対して０.１〜４.０％に規制し、かつ弗化物を
ワイヤ全重量に対して０.０５〜１.０％含有すると共
に、充填フラックス及び金属外皮の一方又は双方にワイ
ヤ全重量当たり、Ｃ：０.０６〜０.２％、Ｓi：０.３〜
１.２％、Ｍn：１.０〜７.０％、Ｎi：８.０〜１０.０
％、Ｃr：２６.０〜３０.０％、Ｎ：０.０１〜０.０５
％、を含有することを特徴とするステンレス鋼と炭素鋼
の異材すみ肉溶接用フラックス入りワイヤを要旨として
いる。That is, according to the present invention, in a flux-cored wire in which a metal shell is filled with flux, the total amount of oxides, fluorides and carbonates in the flux is 0.1 to 4. 0% to 0.01% and a fluoride content of 0.05 to 1.0% based on the total weight of the wire, and one or both of the filling flux and the metal shell, based on the total weight of the wire, C: 0.06 to 0. .2%, Si: 0.3 ~
1.2%, Mn: 1.0 to 7.0%, Ni: 8.0 to 10.0
%, Cr: 26.0 to 30.0%, N: 0.01 to 0.05
%, A flux-cored wire for fillet welding of dissimilar stainless steel and carbon steel.
【００１０】また、他の本発明は、上記のフラックス入
りワイヤを用いて、溶接時の入熱量が４.５〜２５.０ｋ
Ｊ／cmの条件ですみ肉溶接することを特徴とするステン
レス鋼と炭素鋼の異材すみ肉溶接施工方法を要旨として
いる。In another aspect of the present invention, the heat input during welding is 4.5 to 25.0 k using the above flux-cored wire.
The gist is a fillet welding method for dissimilar materials of stainless steel and carbon steel, which is characterized by performing fillet welding under the condition of J / cm.
【００１１】[0011]
【作用】以下に本発明を更に詳細に説明する。The present invention will be described in more detail below.
【００１２】前述の如く、本発明に係る溶接材料は金属
粉を主体とするメタルタイプのフラックス入りワイヤで
あるが、まず、その知見を得るに至った理由を説明す
る。As described above, the welding material according to the present invention is a metal-type flux-cored wire mainly composed of metal powder. First, the reason why the knowledge is obtained will be explained.
【００１３】すなわち、通常用いられるスラグタイプの
フラックス入りワイヤでは、ルート部の溶込みが浅く、
溶込み不良が生じやすい。一方、メタルタイプのフラッ
クス入りワイヤでは、発生するスラグ量が少なく、アー
クの集中性が良いため、良好なルート部の溶込みが得ら
れ易い。That is, in a commonly used slag type flux cored wire, the penetration at the root portion is shallow,
Poor penetration easily occurs. On the other hand, in the metal type flux-cored wire, the amount of slag generated is small and the arc concentration is good, so that good penetration of the root portion is easily obtained.
【００１４】更に、溶接材料の成分系については、従来
使用されている３０９系(例えば、ＪＩＳ Ｚ３３２３
ＹＦ３０９、ＹＦ３０９Ｌ、ＡＷＳ Ａ５.２２ Ｅ３０
９ＴＸ-Ｘなど)や、３１２系(例えば、ＡＷＳ Ａ５.２
２ Ｅ３１２Ｔ-Ｘ等)を参考として、メタルタイプのフ
ラックス入りワイヤをベースに検討を行った。Further, regarding the component system of the welding material, the 309 system conventionally used (for example, JIS Z3323) is used.
YF309, YF309L, AWS A5.22 E30
9TX-X) and 312 series (eg, AWS A5.2)
2 E312T-X, etc.) as a reference, and a metal type flux-cored wire was used as a base for the study.
【００１５】その結果、従来の３０９系、３１２系の溶
接材料では、希釈によって溶接金属のミクロ組織がオー
ステナイト＋マルテンサイト＋フェライトの３相混合領
域、オーステナイト＋マルテンサイト領域、完全オース
テナイト領域、或いはオーステナイト＋極少量フェライ
ト領域となり易く、高温割れや低温割れが発生し易いこ
とがわかった。As a result, in the conventional 309-series and 312-series welding materials, the microstructure of the weld metal due to dilution causes the three-phase mixed region of austenite + martensite + ferrite, austenite + martensite region, complete austenite region, or austenite region. + It was found that a very small amount of ferrite is likely to occur, and hot cracking and cold cracking are likely to occur.
【００１６】そこで、母材の希釈を受けて、溶接金属の
ミクロ組織がオーステナイト＋マルテンサイト＋フェラ
イトの３相混合領域や、オーステナイト＋極少量フェラ
イト領域、或いは完全オーステナイト領域になっても、
高温割れや低温割れの起こしにくい成分系を検討した。Therefore, even if the microstructure of the weld metal becomes a three-phase mixed region of austenite + martensite + ferrite, an austenite + extremely small amount ferrite region, or a complete austenite region due to the dilution of the base metal,
A component system that is resistant to hot cracking and cold cracking was studied.
【００１７】その結果、同じＮi当量であっても、Ｃ及
びＭnを増加させ、Ｎiを減少させた組成が、３相混合領
域やオーステナイト＋極少量フェライト領域或いは完全
オーステナイト領域において、高温割れ、低温割れが生
じにくいことを見い出した。As a result, even if the Ni equivalent is the same, the composition in which C and Mn are increased and Ni is decreased has a high temperature crack and a low temperature in the three-phase mixed region, the austenite + extremely small amount ferrite region or the complete austenite region. We have found that cracks are unlikely to occur.
【００１８】また、更にメタルタイプのフラックス入り
ワイヤにすることにより、スラグタイプのフラックス入
りワイヤよりも、ワイヤの水分量が少なくなり、溶接金
属のミクロ組織がマルテンサイトとなっても水素に起因
した低温割れが生じにくい効果もある。Further, by using a metal type flux-cored wire, the water content of the wire becomes smaller than that of the slag type flux-cored wire, and even if the microstructure of the weld metal becomes martensite, it is caused by hydrogen. It also has the effect of preventing cold cracking.
【００１９】以上の知見に基づき、上述の構成からなる
ステンレス鋼と炭素鋼の異材すみ肉溶接用フラックス入
りワイヤを完成したものである。Based on the above findings, the flux-cored wire for the fillet welding of the dissimilar materials of stainless steel and carbon steel having the above-mentioned structure has been completed.
【００２０】次に本発明のフラックス入りワイヤの数値
限定理由について述べる。Next, the reasons for limiting the numerical values of the flux-cored wire of the present invention will be described.
【００２１】Ｃ：Ｃは強力なオーステナイト生成元素で
あり、０.２％を超えて添加すると溶接金属中のフェラ
イト量が減少し、高温割れが発生し易くなる。一方、３
相混合領域、完全オーステナイト領域や、オーステナイ
ト＋極少量フェライト領域での高温割れを防ぐためには
０.０６％以上が必要である。したがって、充填フラッ
クス及び金属外皮の一方又は双方中のＣ量は０.０６〜
０.２％とする。より好ましくは０.０６〜０.１５％で
ある。C: C is a strong austenite-forming element, and if it is added in an amount of more than 0.2%, the amount of ferrite in the weld metal decreases and hot cracking easily occurs. On the other hand, 3
In order to prevent hot cracking in the phase mixed region, the complete austenite region, and the austenite + extremely small amount ferrite region, 0.06% or more is necessary. Therefore, the C content in one or both of the filling flux and the metal shell is 0.06 to
It is set to 0.2%. It is more preferably 0.06 to 0.15%.
【００２２】Ｓi：Ｓiは溶接金属の脱酸及び湯流れ性確
保のために０.３％以上が必要である。しかし、１.２％
を超えるとフェライト量が増加しすぎ、溶接金属が脆化
し易くなる。したがって、充填フラックス及び金属外皮
の一方又は双方中のＳi量は０.３〜１.２％とする。Si: Si is required to be 0.3% or more in order to deoxidize the weld metal and secure the flowability of the molten metal. However, 1.2%
If it exceeds, the amount of ferrite increases too much and the weld metal is apt to become brittle. Therefore, the amount of Si in one or both of the filling flux and the metal shell is set to 0.3 to 1.2%.
【００２３】Ｍn：Ｍnは本発明のポイントの１つであ
り、３相混合領域、完全オーステナイト領域或いはオー
ステナイト＋極少量フェライト領域での高温割れを防ぐ
ためには１.０％以上が必要である。しかし、７.０％を
超えると溶接金属中のフェライト量が低下して高温割れ
を生じ易い。したがって、充填フラックス及び金属外皮
の一方又は双方中のＭn量は１.０〜７.０％とする。よ
り好ましくは２.６〜７.０％である。Mn: Mn is one of the points of the present invention, and is required to be 1.0% or more in order to prevent hot cracking in the three-phase mixed region, the complete austenite region or the austenite + very small amount ferrite region. However, if it exceeds 7.0%, the amount of ferrite in the weld metal decreases, and hot cracking tends to occur. Therefore, the amount of Mn in one or both of the filling flux and the metal shell is set to 1.0 to 7.0%. More preferably, it is 2.6 to 7.0%.
【００２４】Ｎi：Ｎiは８.０％未満であると溶接金属
組織のマルテンサイト量が増加し、高温割れ、低温割れ
を生じ易い。また１０.０％を超えるとフェライト量が
減少し、高温割れが生じ易い。したがって、充填フラッ
クス及び金属外皮の一方又は双方中のＮi量は８.０〜１
０.０％とする。Ni: When Ni is less than 8.0%, the amount of martensite in the weld metal structure increases, and hot cracking and cold cracking are likely to occur. On the other hand, if it exceeds 10.0%, the amount of ferrite decreases and hot cracking tends to occur. Therefore, the Ni content in one or both of the filling flux and the metal shell is 8.0-1.
It is set to 0.0%.
【００２５】Ｃr：Ｃrは溶接金属中のフェライト量を維
持するためには最低２６.０％が必要である。しかし、
３０.０％を超えると溶接金属中のフェライト含有量が
多すぎて脆化の危険性が高まる。したがって、充填フラ
ックス及び金属外皮の一方又は双方中のＣr量は２６.０
〜３０.０％とする。Cr: Cr must be at least 26.0% in order to maintain the amount of ferrite in the weld metal. But,
If it exceeds 30.0%, the content of ferrite in the weld metal is too large and the risk of embrittlement increases. Therefore, the Cr content in one or both of the filling flux and the metal shell is 26.0.
~ 30.0%.
【００２６】Ｎ：Ｎは溶接金属のオーステナイト組織を
強化しマルテンサイトフェライトの発生を抑えるため、
最低０.０１％が必要である。しかし、０.０５％を超え
ると溶接金属中のフェライト量が減少して、高温割れを
生じ易くする。したがって、充填フラックス及び金属外
皮の一方又は双方中のＮ量は０.０１〜０.０５％とす
る。N: N strengthens the austenite structure of the weld metal and suppresses the generation of martensite ferrite.
A minimum of 0.01% is required. However, if it exceeds 0.05%, the amount of ferrite in the weld metal decreases, and hot cracking easily occurs. Therefore, the N content in one or both of the filling flux and the metal shell is set to 0.01 to 0.05%.
【００２７】フラックス中の酸化物、弗化物及び炭酸
塩：フラックス中に酸化物、弗化物及び炭酸塩を合計で
０.１％以上含有させることで、アークの安定性が改善
される。しかし、４.０％を超えると、メタルタイプと
しての特性が失われ、ルート部の溶込み不足が生じ易く
なる。したがって、フラックス中の酸化物、弗化物及び
炭酸塩の合計を０.１％以上、４.０％以下に制限する。Oxide, Fluoride and Carbonate in Flux: Stability of the arc is improved by including oxide, fluoride and carbonate in the flux in a total amount of 0.1% or more. However, if it exceeds 4.0%, the characteristics as a metal type are lost, and insufficient penetration of the root portion easily occurs. Therefore, the total amount of oxides, fluorides and carbonates in the flux is limited to 0.1% or more and 4.0% or less.
【００２８】なお、酸化物、弗化物及び炭酸塩としては
種々のものが可能であるが、酸化物としてはＴiＯ2、Ｓ
iＯ2、ＭgＯ、Ａl2Ｏ3、ＺrＯ2等、弗化物としてはＮa
Ｆ、Ｋ2ＳiＦ6、ＢaＦ2、ＣaＦ2、ＺrＦ等、炭酸塩とし
てはＬi2ＣＯ3、ＣaＣＯ3、ＢaＣＯ3等が挙げられる。Various kinds of oxides, fluorides and carbonates are possible, but as oxides, TiO 2 and S can be used.
iO 2 , MgO, Al 2 O 3 , ZrO 2, etc., and Na as a fluoride
F, K 2 SiF 6, BaF 2, CaF 2, ZrF like, Li 2 CO 3, CaCO 3 , BaCO 3 and the like as carbonates.
【００２９】但し、そのうちの弗化物量は、アークの集
中性維持のために最低限０.０５％が必要である。しか
し、１.０％を超えるとアークが不安定となり、スパッ
タ量が増加して溶接作業性を著しく損なうので好ましく
ない。However, the minimum amount of fluoride is required to be 0.05% to maintain the concentration of the arc. However, if it exceeds 1.0%, the arc becomes unstable, the amount of spatter increases, and welding workability is significantly impaired, which is not preferable.
【００３０】フラックス入りワイヤの他の条件、例え
ば、ワイヤ断面形状、ワイヤ径などは適宜決められる。
また継ぎ目有り又は無しのいずれのフラックス入りワイ
ヤも可能である。また、金属外皮の材質も上記のメタル
成分の条件を満たす限り、軟鋼、低合金鋼、合金鋼等々
の種々の材質が可能である。Other conditions for the flux-cored wire, such as the wire cross-sectional shape and the wire diameter, are appropriately determined.
Also, any flux-cored wire with or without seams is possible. Further, as the material of the metal outer shell, various materials such as mild steel, low alloy steel, alloy steel and the like can be used as long as the conditions of the above metal components are satisfied.
【００３１】次に、本発明に係る異材すみ肉溶接施工方
法は、上記構成のフラックス入りワイヤを用いてステン
レス鋼と炭素鋼のすみ肉継手を溶接するが、その際、入
熱量を４.５〜２５.０ｋＪ／cm、より好ましくは４.５
〜２０.０ｌＪ／cmに制限して行うことを特徴としてい
る。Next, according to the fillet welding method for dissimilar materials according to the present invention, the fillet joint of stainless steel and carbon steel is welded using the flux-cored wire having the above-mentioned configuration, and the heat input is 4.5 at this time. ~ 25.0 kJ / cm, more preferably 4.5
It is characterized in that it is performed at a limit of up to 20.0 lJ / cm.
【００３２】入熱量が２５.０ｋＪ／cmを超えると、希
釈が大きすぎて、溶接金属のミクロ組織がオーステナイ
ト＋マルテンサイト＋フェライトの３相混合領域或いは
フェライト量の少ないオーステナイト領域となり、高温
割れや低温われが生じ易い。また、４.５ｋＪ／cm未満
では、希釈が少なく、溶接金属のミクロ組織がオーステ
ナイト＋高フェライトとなり、高温割れの原因となる。
またルート部に溶込み不良が生じ易くなる。When the heat input exceeds 25.0 kJ / cm, the dilution is too large and the microstructure of the weld metal becomes a three-phase mixed region of austenite + martensite + ferrite or an austenite region with a small amount of ferrite, causing high temperature cracking and Low temperature cracks easily occur. On the other hand, if it is less than 4.5 kJ / cm, the dilution is small and the microstructure of the weld metal becomes austenite + high ferrite, which causes hot cracking.
In addition, defective penetration easily occurs in the root portion.
【００３３】なお、本発明を適用する一方の母材のステ
ンレス鋼としては、種々の成分系のものが可能であり、
例えば、ＪＩＧ規格に規定されているフェライト系ステ
ンレス鋼、オーステナイト系ステンレス鋼、マルテンサ
イト系ステンレス鋼など或いはその類似組成のものも可
能である。同様に、炭素鋼としても軟鋼、低炭素鋼、低
合金鋼、中炭素鋼や、高炭素鋼も可能である。As the base material, stainless steel, to which the present invention is applied, it is possible to use various components.
For example, ferritic stainless steel, austenitic stainless steel, martensitic stainless steel, or the like having a composition similar to that specified in the JIG standard is also possible. Similarly, as carbon steel, mild steel, low carbon steel, low alloy steel, medium carbon steel, and high carbon steel are also possible.
【００３４】以上のように本発明は構成されるが、より
好ましくは、以下の溶接条件と組合わせることが望まし
い。 溶接電流 ：２８０〜３４０Ａmp アーク電圧：３２〜３７Ｖ 溶接速度 ：３５〜１２０cpm トーチ角度：４０〜５０度(下板側からの角度)、かつ、
−１０〜１０度(溶接線に対して垂直な面からの角度) ワイヤ狙い位置：０〜０.５mm(ルート部から下板側)或
いは０.５〜０mm(ルート部から上板側)The present invention is constructed as described above, but more preferably, it is desirable to combine it with the following welding conditions. Welding current: 280-340 Amp Arc voltage: 32-37 V Welding speed: 35-120 cpm Torch angle: 40-50 degrees (angle from lower plate side), and
-10 to 10 degrees (angle from the plane perpendicular to the welding line) Wire target position: 0 to 0.5 mm (from root to lower plate) or 0.5 to 0 mm (from root to upper plate)
【００３５】また、シールドガスとしてはＡr＋ＣＯ2の
ほか、Ａr或いはＣＯ2のみも可能であり、他に少量のガ
スも混合してもよい。As the shield gas, Ar + CO 2 or Ar or CO 2 alone can be used, and a small amount of gas may be mixed.
【００３６】以下に本発明の実施例を示す。Examples of the present invention will be shown below.
【００３７】表１に示す化学成分のフープを使用して、
表４に示す組成のフラックス入りワイヤを常法により試
作した。これらの試作ワイヤを用いて、表２及び表３の
溶接条件により、ステンレス鋼(ＳＵＳ３０４Ｌ)と炭素
鋼(ＳＭ４９０Ａ)を図１のすみ肉継手とし、溶接試験を
実施した。その結果を表５に示す。Using the hoops of the chemical composition shown in Table 1,
Flux-cored wires having the compositions shown in Table 4 were manufactured by a conventional method. Using these trial wires, under the welding conditions shown in Tables 2 and 3, stainless steel (SUS304L) and carbon steel (SM490A) were used as the fillet joint shown in Fig. 1 to perform a welding test. The results are shown in Table 5.
【００３８】表５において、Ｎo.１〜Ｎo.１０は本発明
例であり、いずれも、高温割れ、低温割れの発生がな
く、溶接作業性も良く、良好な結果を示した。In Table 5, No. 1 to No. 10 are the examples of the present invention, and in all cases, neither hot cracking nor cold cracking occurred, welding workability was good, and good results were shown.
【００３９】これに対し、比較例のＮo.１１はＣが本発
明範囲の下限を外れており、溶接金属に高温割れが発生
し、Ｎo.１２はＣが本発明範囲の上限を外れており、溶
接金属に高温割れが発生した。On the other hand, in Comparative Example No. 11, C was outside the lower limit of the present invention range, hot cracking occurred in the weld metal, and in No. 12, C was outside the upper limit range of the present invention. , Hot cracking occurred in the weld metal.
【００４０】比較例のＮo.１３はＳiが本発明範囲の下
限を外れており、湯流れが不良となった。またＮo.１４
はＳiが本発明範囲の上限を外れており、溶接金属中の
フェライト量が増加しすぎて高温割れが発生した。In Comparative Example No. 13, Si was out of the lower limit of the range of the present invention, and the flow of molten metal was poor. Also No.14
Si was outside the upper limit of the range of the present invention, and the amount of ferrite in the weld metal increased too much to cause hot cracking.
【００４１】比較例のＮo.１５はＭnが本発明範囲の下
限を外れており、溶接金属に高温割れが発生し、Ｎo.１
６はＭnが本発明範囲の上限を外れており、溶接金属に
高温割れが発生した。No. 15 of the comparative example had Mn outside the lower limit of the range of the present invention, and hot cracking occurred in the weld metal.
In No. 6, Mn was outside the upper limit of the range of the present invention, and hot cracking occurred in the weld metal.
【００４２】比較例のＮo.１７は酸化物、弗化物、炭酸
塩の合計が本発明範囲の下限を外れており、アーク不安
定となった。またＮo.２１は酸化物、弗化物、炭酸塩の
合計が本発明範囲の上限を外れており、スラグの量が多
すぎ、ルート部の溶込みが不良となった。In Comparative Example No. 17, the total amount of oxides, fluorides and carbonates was out of the lower limit of the range of the present invention, and the arc became unstable. Further, in No. 21, the total amount of oxides, fluorides, and carbonates was outside the upper limit of the range of the present invention, and the amount of slag was too large, resulting in poor penetration at the root portion.
【００４３】比較例のＮo.１８はＮiが本発明範囲の上
限を外れており、溶接金属に高温割れが発生した。In Comparative Example No. 18, Ni was outside the upper limit of the range of the present invention, and hot cracking occurred in the weld metal.
【００４４】比較例のＮo.１９はＮが本発明範囲の下限
を外れており、溶接金属中にマルテンサイトが発生し、
高温割れが発生した。またＮo.２０はＮが本発明範囲の
上限を外れており、ブローホールが発生した。In Comparative Example No. 19, N is out of the lower limit of the range of the present invention, martensite is generated in the weld metal,
Hot cracking occurred. Further, in No. 20, N was outside the upper limit of the range of the present invention, and blowholes were generated.
【００４５】比較例のＮo.２２は入熱量が低すぎて、ビ
ード形状が不良となった。また溶接金属のミクロ組織が
高フェライトとなり高温割れが発生した。またＮo.２３
は入熱量が多すぎて、母材の希釈が過大となったため、
高温割れ、低温割れが発生した。In Comparative Example No. 22, the amount of heat input was too low, and the bead shape became defective. In addition, the microstructure of the weld metal became high ferrite and hot cracking occurred. Also No.23
Has too much heat input and the base material has been diluted too much.
Hot cracking and cold cracking occurred.
【００４６】比較例のＮo.２４は弗化物量が本発明範囲
の上限を超えており、アークが不安定となり、スパッタ
が増加した。またＮo.２５は弗化物量が本発明範囲の下
限を下回り、アークの集中性が著しく損なわれた。In Comparative Example No. 24, the amount of fluoride exceeded the upper limit of the range of the present invention, the arc became unstable, and the spatter increased. Further, in No. 25, the amount of fluoride was less than the lower limit of the range of the present invention, and the arc concentration was significantly impaired.
【００４７】[0047]
【表１】 [Table 1]
【００４８】[0048]
【表２】 [Table 2]
【００４９】[0049]
【表３】 [Table 3]
【００５０】[0050]
【表４】 [Table 4]
【００５１】[0051]
【表５】 [Table 5]
【００５２】[0052]
【発明の効果】以上詳述したように、本発明によれば、
ステンレス鋼と炭素鋼の異材すみ肉溶接において、健全
なすみ肉継手が高効率で得られる。As described in detail above, according to the present invention,
A sound fillet joint can be obtained with high efficiency in fillet welding of dissimilar materials of stainless steel and carbon steel.
【図１】すみ肉継手の形状及び施工要領を説明する図で
ある。FIG. 1 is a diagram illustrating a shape of a fillet joint and a construction procedure.
Claims (2)
フラックス入りワイヤにおいて、フラックス中の酸化
物、弗化物及び炭酸塩の合計をワイヤ全重量に対して
０.１〜４.０重量％(以下、％)に規制し、かつ弗化物を
ワイヤ全重量に対して０.０５〜１.０％含有すると共
に、充填フラックス及び金属外皮の一方又は双方にワイ
ヤ全重量当たり、 Ｃ：０.０６〜０.２％、 Ｓi：０.３〜１.２％、 Ｍn：１.０〜７.０％、 Ｎi：８.０〜１０.０％、 Ｃr：２６.０〜３０.０％、 Ｎ：０.０１〜０.０５％、 を含有することを特徴とするステンレス鋼と炭素鋼の異
材すみ肉溶接用フラックス入りワイヤ。1. In a flux-cored wire having a metal shell filled with flux, the total amount of oxides, fluorides and carbonates in the flux is 0.1 to 4.0% by weight relative to the total weight of the wire ( %), And contains fluoride in an amount of 0.05 to 1.0% with respect to the total weight of the wire, and one or both of the filling flux and the metal shell, based on the total weight of the wire, C: 0.06. -0.2%, Si: 0.3-1.2%, Mn: 1.0-7.0%, Ni: 8.0-10.0%, Cr: 26.0-30.0%, A flux-cored wire for fillet welding of dissimilar materials of stainless steel and carbon steel, containing N: 0.01 to 0.05%.
を用いて、溶接時の入熱量が４.５〜２５.０ｋＪ／cmの
条件ですみ肉溶接することを特徴とするステンレス鋼と
炭素鋼の異材すみ肉溶接施工方法。2. A stainless steel and a carbon steel, characterized in that the flux-cored wire according to claim 1 is used for fillet welding under the condition that the heat input during welding is 4.5 to 25.0 kJ / cm. Method for welding fillets of dissimilar materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5326252A JP2711067B2 (en) | 1993-11-30 | 1993-11-30 | Flux-cored wire for welding dissimilar fillet joint and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5326252A JP2711067B2 (en) | 1993-11-30 | 1993-11-30 | Flux-cored wire for welding dissimilar fillet joint and its construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07155989A true JPH07155989A (en) | 1995-06-20 |
| JP2711067B2 JP2711067B2 (en) | 1998-02-10 |
Family
ID=18185699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5326252A Expired - Lifetime JP2711067B2 (en) | 1993-11-30 | 1993-11-30 | Flux-cored wire for welding dissimilar fillet joint and its construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2711067B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005262319A (en) * | 2004-03-19 | 2005-09-29 | Hobart Brothers Co | Gas-metal arc welding method of ferrous alloy |
| WO2017132020A1 (en) * | 2016-01-28 | 2017-08-03 | Siemens Energy, Inc. | Low heat flux mediated cladding of superalloys using cored feed material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51117140A (en) * | 1975-04-07 | 1976-10-15 | Hitachi Ltd | Composite welding wire for automatic welding of carbon steel and austeniteestainless steel |
-
1993
- 1993-11-30 JP JP5326252A patent/JP2711067B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51117140A (en) * | 1975-04-07 | 1976-10-15 | Hitachi Ltd | Composite welding wire for automatic welding of carbon steel and austeniteestainless steel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005262319A (en) * | 2004-03-19 | 2005-09-29 | Hobart Brothers Co | Gas-metal arc welding method of ferrous alloy |
| KR101320469B1 (en) * | 2004-03-19 | 2013-10-24 | 호바트 브라더스 컴파니 | Metal-core gas metal arc welding of ferrous steels with noble gas shielding |
| WO2017132020A1 (en) * | 2016-01-28 | 2017-08-03 | Siemens Energy, Inc. | Low heat flux mediated cladding of superalloys using cored feed material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2711067B2 (en) | 1998-02-10 |
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