JP2001353575A - High speed tig welding method for austenitic stainless steel - Google Patents
High speed tig welding method for austenitic stainless steelInfo
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- JP2001353575A JP2001353575A JP2000342142A JP2000342142A JP2001353575A JP 2001353575 A JP2001353575 A JP 2001353575A JP 2000342142 A JP2000342142 A JP 2000342142A JP 2000342142 A JP2000342142 A JP 2000342142A JP 2001353575 A JP2001353575 A JP 2001353575A
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- gas
- welding
- stainless steel
- volume
- austenitic stainless
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は非消耗電極を用い
て、不活性ガスをシールドガスとして使用したＴＩＧ溶
接法に関し、特にオーステナイト系ステンレス鋼に適用
する高速度でＴＩＧ溶接する高速ＴＩＧ溶接法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a TIG welding method using a non-consumable electrode and using an inert gas as a shielding gas, and more particularly to a high-speed TIG welding method for high-speed TIG welding applied to austenitic stainless steel. Things.
【０００２】[0002]
【従来の技術】ＴＩＧ溶接法は、消耗電極式のＭＡＧ・
ＭＩＧ溶接法に比べて、高品質な溶接部が得られること
から、原子力関連工業分野や、化学プラント分野におけ
る装置、配管等の施工及びその他ステンレス鋼の加工に
用いられている。しかし、溶け込み不足やハンピングと
いった溶接不良を生じない溶接速度の上限が、ＭＡＧ溶
接法やＭＩＧ溶接法に比べて低速であり、一般的には、
５〜２０ｃｍ／ｍｉｎ程度の低い溶接速度で溶接されて
いる。2. Description of the Related Art The TIG welding method uses a consumable electrode type of MAG.
Compared with the MIG welding method, a higher quality welded portion can be obtained, and thus it is used for construction of equipment and piping in the nuclear power related industrial field and chemical plant field, and other processing of stainless steel. However, the upper limit of the welding speed that does not cause poor welding such as insufficient penetration or humping is lower than that of the MAG welding method or the MIG welding method.
The welding is performed at a low welding speed of about 5 to 20 cm / min.
【０００３】又、従来からＴＩＧ溶接に使用されている
一般的な溶接用シールドガスとしては、Ａrガス単体が
挙げられるが、ＴＩＧ溶接のシールドガスに混合ガスが
用いられることも有り、例えば特開昭６１−２８３４６
５号公報には、Ａrガスに４０〜９０％程度のＨeガスを
添加した混合ガスをシールドガスとしていたり、又、Ａ
rガスに１〜１０％程度のＨ2を添加した混合ガスをシー
ルドガスとして使用していることが開示されている。[0003] As a general welding shielding gas conventionally used for TIG welding, there is an Ar gas simple substance, but a mixed gas is sometimes used as a shielding gas for TIG welding. 61-28346
No. 5 discloses a shield gas containing a mixed gas obtained by adding about 40 to 90% of He gas to Ar gas.
It is disclosed that a mixed gas obtained by adding about 1 to 10% of H 2 to a gas is used as a shielding gas.
【０００４】近年溶接施工の溶接加工能率の向上を図る
ため高速溶接の開発が進められている。然るに、ＴＩＧ
溶接法においては、溶接速度を増加させていった場合、
既存の上記溶接用シールドガスでは、ビード長手方向に
溶着金属の盛り上がりが周期的に繰り返される、いわゆ
るハンピングビードと呼ばれるビード形状が形成され
て、ある一定の溶接速度以上の高速溶接では適切な溶接
ができなかった。しかも、高速な溶接ほど溶け込みが浅
くなり、そのために溶接電流を高くする必要があるが、
溶接電流を高くすると、更にハンピングが起こり易くな
り、結果として既存のシールドガスでは、３０ｃｍ／ｍ
ｉｎ以上の高速度のＴＩＧ溶接は不可能となっていた。[0004] In recent years, the development of high-speed welding has been promoted in order to improve the welding efficiency of welding. But TIG
In the welding method, if the welding speed is increased,
In the existing shielding gas for welding described above, a bead shape called a so-called humping bead is formed in which the swelling of the weld metal is periodically repeated in the longitudinal direction of the bead, and appropriate welding is performed at a high speed welding above a certain welding speed. Could not. In addition, the higher the welding speed, the shallower the penetration, which requires a higher welding current.
When the welding current is increased, humping is more likely to occur, and as a result, in the existing shielding gas, 30 cm / m
It was impossible to perform TIG welding at a high speed of in or more.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記した事情
に鑑みなされたもので、溶接施工の加工能率を向上せし
めることを目的とし、オーステナイト系ステンレス鋼を
ＴＩＧ溶接するにあたって、従来のアルゴンガスをシー
ルドガスを用いたＴＩＧ溶接における溶接速度３０ｃｍ
／ｍｉｎ以上、好ましくは４０ｃｍ／ｍｉｎ以上の高速
度でも、上記ハンピング現象が生ずることなく、安定し
た、良好なビードが形成され、特にオーステナイト系ス
テンレス鋼の溶接に適用し得る高速ＴＩＧ溶接法を提供
することを本発明の解決すべき課題とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to improve the working efficiency of welding work. In performing TIG welding of austenitic stainless steel, conventional argon gas is used. Welding speed 30cm in TIG welding using shielding gas
The present invention provides a high-speed TIG welding method in which a stable and good bead is formed without causing the above-mentioned humping phenomenon even at a high speed of not less than / cm, preferably not less than 40 cm / min, and particularly applicable to welding of austenitic stainless steel. Is to be solved by the present invention.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決し目的達
成のため、請求項１に係わる発明は、ガス組成が、３０
容量％以上４０容量％未満のＨeガス、８〜９容量％の
Ｈ2ガス、残部Ａrガスである３種混合ガスをシールドガ
スとして用いて、非消耗電極によって、オーステナイト
系ステンレス鋼を４０ｃｍ／ｍｉｎ以上の溶接速度でＴ
ＩＧ溶接することを特徴とするオーステナイト系ステン
レス鋼用高速ＴＩＧ溶接法としたものである。請求項２
に係わる発明は ガス組成が、４０容量％以上５０容量
％未満のＨeガス、６〜９容量％のＨ2ガス、残部Ａrガ
スである３種混合ガスをシールドガスとして用いて、非
消耗電極によって、オーステナイト系ステンレス鋼を４
０ｃｍ／ｍｉｎ以上の溶接速度でＴＩＧ溶接することを
特徴とするオーステナイト系ステンレス鋼用高速ＴＩＧ
溶接法としたものである。請求項３に係わる発明は、ガ
ス組成が、５０容量％以上７０容量％未満のＨeガス、
５〜９容量％のＨ2ガス、残部Ａrガスである３種混合ガ
スをシールドガスとして用いて、非消耗電極によって、
オーステナイト系ステンレス鋼を４０ｃｍ／ｍｉｎ以上
の溶接速度でＴＩＧ溶接することを特徴とするオーステ
ナイト系ステンレス鋼用高速ＴＩＧ溶接法としたもので
ある。請求項４に係わる発明は、ガス組成が、７０容量
％以上９０容量％未満のＨeガス、４〜９容量％のＨ2ガ
ス、残部Ａrガスである３種混合ガスをシールドガスと
して用いて、非消耗電極によって、オーステナイト系ス
テンレス鋼を４０ｃｍ／ｍｉｎ以上の溶接速度でＴＩＧ
溶接することを特徴とするオーステナイト系ステンレス
鋼用高速ＴＩＧ溶接法としたものである。請求項５に係
わる発明は、ガス組成が、９０容量％以上のＨeガス、
３〜９容量％のＨ2ガス、残部Ａrガスである３種混合ガ
スをシールドガスとして用いて、非消耗電極によって、
オーステナイト系ステンレス鋼を４０ｃｍ／ｍｉｎ以上
の溶接速度でＴＩＧ溶接することを特徴とするオーステ
ナイト系ステンレス鋼用高速ＴＩＧ溶接法としたもので
ある。請求項６に係わる発明は、ガス組成が、２〜９容
量％のＨ2ガス、残部Ｈeガスである２種混合ガスをシー
ルドガスとして用いて、非消耗電極によって、オーステ
ナイト系ステンレス鋼を４０ｃｍ／ｍｉｎ以上の溶接速
度でＴＩＧ溶接することを特徴とするオーステナイト系
ステンレス鋼用高速ＴＩＧ溶接法としたものである。Means for Solving the Problems In order to solve the above-mentioned problems and achieve the object, the invention according to claim 1 is characterized in that the gas composition is 30
An austenitic stainless steel of 40 cm / min by a non-consumable electrode using a shielding gas of a mixed gas of He gas of not less than 40% by volume and less than 40% by volume of H 2 gas, 8 to 9% by volume of H 2 gas, and the remaining Ar gas. T at the above welding speed
A high-speed TIG welding method for austenitic stainless steel characterized by IG welding. Claim 2
The invention according to the present invention relates to a non-consumable electrode using a gas mixture having a gas composition of 40% by volume or more and less than 50% by volume of He gas, 6 to 9% by volume of H 2 gas, and a balance of Ar gas as a shielding gas. , Austenitic stainless steel 4
High-speed TIG for austenitic stainless steel, characterized in that TIG welding is performed at a welding speed of 0 cm / min or more.
This is a welding method. The invention according to claim 3 is a He gas having a gas composition of 50% by volume or more and less than 70% by volume,
Using a mixed gas of 5 to 9% by volume of H 2 gas and a balance of Ar gas as a shielding gas, and using a non-consumable electrode,
A high-speed TIG welding method for austenitic stainless steel, wherein austenitic stainless steel is TIG-welded at a welding speed of 40 cm / min or more. Invention according to claim 4, gas composition, using He gas of less than 70 volume% to 90 volume%, 4-9% by volume of H 2 gas, a 3-component mixture gas the balance Ar gas as a shielding gas, Austenitic stainless steel is welded at a welding speed of 40 cm / min or more using a non-consumable electrode.
This is a high-speed TIG welding method for austenitic stainless steel characterized by welding. The invention according to claim 5 is a He gas having a gas composition of 90% by volume or more,
Using 3-9 volume% of H 2 gas and the balance of Ar gas as a shielding gas, a non-consumable electrode
A high-speed TIG welding method for austenitic stainless steel, wherein austenitic stainless steel is TIG-welded at a welding speed of 40 cm / min or more. The invention according to claim 6 is that the austenitic stainless steel is made of 40 cm / h by a non-consumable electrode by using a mixture gas of H 2 gas having a gas composition of 2 to 9% by volume and a balance gas of He gas as a shielding gas. A high-speed TIG welding method for austenitic stainless steel, characterized in that TIG welding is performed at a welding speed of at least min.
【０００７】[0007]
【発明の実施の形態】本発明のオーステナイト系ステン
レス鋼用高速ＴＩＧ溶接法は以下の如き形態で実施され
る。タングステンの如き非消耗電極として、溶接すべき
母材に向けてシールドガスを噴射せしめて、シ−ルドガ
ス雰囲気下で、非消耗電極と溶接母材間にアークを発生
せしめて溶接する方法であり、従来のアルゴンガスをシ
ールドガスとして使用した場合の溶接速度３０ｃｍ／ｍ
ｉｎ以上の４０ｃｍ／ｍｉｎ以上の溶接速度で溶接する
方法である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The high-speed TIG welding method for austenitic stainless steel according to the present invention is carried out in the following manner. As a non-consumable electrode such as tungsten, a method of injecting a shielding gas toward a base material to be welded, generating an arc between the non-consumable electrode and the welding base material in a shield gas atmosphere, and performing welding. 30cm / m welding speed when using conventional argon gas as shielding gas
This is a method of welding at a welding speed of 40 cm / min or more of in or more.
【０００８】そして、そのために前記シールドガスとし
て、［Ｈeガス ＋ Ｈ2ガス ＋ Ａrガス］よりなる３種
混合ガス、又は［Ｈeガス ＋ Ｈ2ガス］よりなる２種混
合ガスを使用し、その組成は以下の通りでとしたもので
ある。 ● Ｈeガス:３０〜４０未満容量％、Ｈ2ガス:８〜９容
量％、残部Ａrガス ● Ｈeガス:４０〜５０未満容量％、Ｈ2ガス:６〜９容
量％、残部Ａrガス ● Ｈeガス:５０〜７０未満容量％、Ｈ2ガス:５〜９容
量％、残部Ａrガス ● Ｈeガス:７０〜９０未満容量％、Ｈ2ガス:４〜９容
量％、残部Ａrガス ● Ｈeガス:９０容量％以上、Ｈ2ガス:３〜９容量％、
残部Ａrガス ● Ｈ2ガス:２〜９容量％、残部Ｈeガス[0008] Then, as the shield gas for its, using two mixed gas composed of [the He gas + H 2 gas + Ar gas] three mixed gas consisting of, or [the He gas + H 2 gas, the The composition was as follows. ● He gas: less than 30 to 40% by volume, H 2 gas: 8 to 9% by volume, balance Ar gas ● He gas: 40 to less than 50% by volume, H 2 gas: 6 to 9% by volume, balance Ar gas ● He gas: less than 50 to 70 volume%, H 2 gas: 5 to 9% by volume, remainder Ar gas ● the He gas: less than 70 to 90 volume%, H 2 gas: 4-9% by volume, remainder Ar gas ● the He gas: 90% by volume or more, H 2 gas: 3-9% by volume,
Remaining Ar gas ● H 2 gas: 2 to 9% by volume, remaining He gas
【０００９】以上の条件によりオーステナイト系ステン
レス鋼をＴＩＧ溶接することにより、ハンピング等のビ
ード不整が生じることなく、水素の爆発範囲外となって
安全となり、従来のアルゴンガスをシールドガスとして
使用してＴＩＧ溶接した場合に良好な状態で溶接可能な
溶接速度３０ｃｍ／ｍｉｎ以上の溶接速度である、４０
ｃｍ／ｍｉｎ以上の溶接速度で溶接することができ、溶
接施工の加工能率を著しく向上せしめることができる。By performing TIG welding on austenitic stainless steel under the above conditions, bead irregularities such as humping do not occur, and it is safe to go outside the explosion range of hydrogen, and conventional argon gas is used as a shielding gas. A welding speed of 30 cm / min or more that can be welded in a good state when TIG welding is performed.
Welding can be performed at a welding speed of not less than cm / min, and the processing efficiency of welding can be significantly improved.
【００１０】[0010]
【実施例】次に、本発明のオーステナイト系ステンレス
鋼用高速ＴＩＧ溶接法の実施例について説明する。 ［実施例１］本発明の実施例１として、以下の如き溶接
条件により、オーステナイト系ステンレス鋼よりなる母
材に高速ＴＩＧ溶接を行い、その時使用するシールドガ
スの組成を変化せしめるとともに、それぞれの組成のシ
ールドガスの雰囲気下で溶接速度を変化せしめて、その
組成変化と溶接速度の変化によるハンピングの発生の有
無について確認、評価した。Next, an embodiment of the high-speed TIG welding method for austenitic stainless steel according to the present invention will be described. Example 1 As Example 1 of the present invention, high-speed TIG welding was performed on a base material made of austenitic stainless steel under the following welding conditions, and the composition of the shielding gas used at that time was changed. The welding speed was varied in an atmosphere of the shielding gas described above, and it was confirmed and evaluated whether or not humping occurred due to the change in the composition and the variation in welding speed.
【００１１】＜溶接条件＞ ・溶接母材：オーステナイト系ステンレス鋼 ＳＵＳ３
０４、板厚６ｍｍ ・電極：ＪＩＳ Ｚ３２３３ ＹＷＬａ-２規格品タング
ステン 直径３.２ｍｍ ・電極−母材間距離：３ｍｍ ・トーチ傾斜角度：鉛直 ・前進角度：０度 ・溶接形状：ビードオンプレート溶接 以上の条件下で、溶接電流として２００Ａを流して、ビ
ードオンプレート溶接を行った。溶接速度は８０ｃｍ／
ｍｉｎ、１００ｃｍ／ｍｉｎ、１２０ｃｍ／ｍｉｎ、１
４０ｃｍ／ｍｉｎの４段階で各組成について溶接を行っ
た。<Welding conditions> Welding base material: austenitic stainless steel SUS3
04, plate thickness 6mm ・ Electrode: JIS Z3233 YWLa-2 standard product tungsten diameter 3.2mm ・ Distance between electrode and base material: 3mm ・ Torch tilt angle: vertical ・ Advance angle: 0 ° ・ Welding shape: bead-on-plate welding Under the above conditions, a bead-on-plate welding was performed by flowing 200 A as a welding current. The welding speed is 80cm /
min, 100 cm / min, 120 cm / min, 1
Welding was performed for each composition at four stages of 40 cm / min.
【００１２】そして、シールドガスとして、ヘリウムガ
ス（Ｈe）、水素ガス（Ｈ2）及びアルゴンガス（Ａr）
の３種類の混合ガスの組成（容量％）を変化せしめて、
それぞれの組成ガスをシールドガスに使用した時の、ハ
ンピング現象発生の有無を確認し、評価した。これを表
１に表示する。なお、ハンピング現象発生の確認評価
は、以下の如き２段階評価で行った。 ○：ハンピング現象の発生無しで良好。 ×：ハンピング現象の発生有りで不合格。Helium gas (He), hydrogen gas (H 2 ), and argon gas (Ar) are used as shielding gases.
By changing the composition (volume%) of the three types of mixed gas,
When each composition gas was used as a shielding gas, the presence or absence of the occurrence of a humping phenomenon was confirmed and evaluated. This is shown in Table 1. In addition, the confirmation evaluation of the occurrence of the humping phenomenon was performed by the following two-step evaluation. ：: good without occurrence of humping phenomenon. ×: Failed due to occurrence of humping phenomenon.
【００１３】[0013]
【表１】 [Table 1]
【００１４】表１に表示されて明らかなように、実施例
１により以下の事項が確認された。 シ−ルドガスとして従来のＡrガス単体を使用し
て、オーステナイト系ステンレス鋼をＴＩＧ溶接する
と、ハンピング現象が発生することなく溶接し得る最大
溶接速度は３０ｃｍ／ｍｉｎであることが確認できた。 又、シ−ルドガスとしてＨeガス単体、又はＨ2ガス
（９容量％）＋残部Ａrガス（９１容量％）の２種混合
ガスを使用して、オーステナイト系ステンレス鋼をＴＩ
Ｇ溶接すると、ハンピング現象が発生しない最大溶接速
度は１００ｃｍ／ｍｉｎであることが確認できた。As apparent from Table 1, the following items were confirmed by Example 1. When TIG welding of austenitic stainless steel using conventional Ar gas alone as a shielding gas, it was confirmed that the maximum welding speed at which welding could be performed without occurrence of a humping phenomenon was 30 cm / min. The austenitic stainless steel is made of TI gas by using He gas alone or a mixed gas of H 2 gas (9% by volume) + remaining Ar gas (91% by volume) as a shield gas.
It was confirmed that the maximum welding speed at which the humping phenomenon did not occur when G welding was performed was 100 cm / min.
【００１５】 シールドガスとして、Ｈeガス（３０
〜４０未満容量％）＋Ｈ2ガス（８〜９容量％）＋残部
Ａrガスの３種混合ガスを使用して、オーステナイト系
ステンレス鋼をＴＩＧ溶接すると、溶接速度を１２０ｃ
ｍ／ｍｉｎに高めても、ハンピング現象が発生すること
なく良好なＴＩＧ溶接ができることが確認できた。 シールドガスとして、Ｈeガス（４０〜５０未満容
量％）＋Ｈ2ガス（６〜９容量％）＋残部Ａrガスの３種
混合ガスを使用して、オーステナイト系ステンレス鋼を
ＴＩＧ溶接すると、溶接速度を１２０ｃｍ／ｍｉｎに高
めても、ハンピング現象が発生することなく良好なＴＩ
Ｇ溶接ができることが確認できた。 シールドガスとして、Ｈeガス（５０〜７０未満容
量％）＋Ｈ2ガス（５〜９容量％）＋残部Ａrガスの３種
混合ガスを使用して、オーステナイト系ステンレス鋼を
ＴＩＧ溶接すると、溶接速度を１２０ｃｍ／ｍｉｎに高
めても、ハンピング現象が発生することなく良好なＴＩ
Ｇ溶接ができることが確認できた。 シールドガスとして、Ｈeガス（７０〜９０未満容
量％）＋Ｈ2ガス（４〜９容量％）＋残部Ａrガスの３種
混合ガスを使用して、オーステナイト系ステンレス鋼を
ＴＩＧ溶接すると、溶接速度を１２０ｃｍ／ｍｉｎ以上
に高めても、ハンピング現象の発生がなく、良好なＴＩ
Ｇ溶接ができることが確認できた。As a shielding gas, He gas (30
40 less than the capacity%) + H 2 gas (8-9 vol%) + using 3-component mixture gas of balance Ar gas, 120c when TIG welding, the welding speed of austenitic stainless steel
It was confirmed that even when the rate was increased to m / min, good TIG welding could be performed without occurrence of a humping phenomenon. As shielding gas, using He gas (volume% less than 40 to 50) + H 2 gas (6-9 volume%) + 3-component mixture gas of balance Ar gas, when TIG welding austenitic stainless steel, the welding speed Even if the pressure is increased to 120 cm / min, a good TI
It was confirmed that G welding was possible. As shielding gas, using He gas (volume% less than 50-70) + H 2 gas (5-9 volume%) + 3-component mixture gas of balance Ar gas, when TIG welding austenitic stainless steel, the welding speed Even if the pressure is increased to 120 cm / min, a good TI
It was confirmed that G welding was possible. As shielding gas, using He gas (volume% less than 70 to 90) + H 2 gas (4-9 volume%) + 3-component mixture gas of balance Ar gas, when TIG welding austenitic stainless steel, the welding speed Even if the pressure is increased to 120 cm / min or more, no humping phenomenon occurs and good TI
It was confirmed that G welding was possible.
【００１６】 シールドガスとして、Ｈeガス（９０
容量％以上）＋Ｈ2ガス（３〜９容量％）＋残部Ａrガス
の３種混合ガスを使用して、オーステナイト系ステンレ
ス鋼をＴＩＧ溶接すると、溶接速度を１２０ｃｍ／ｍｉ
ｎ以上に高めても、ハンピング現象が発生することなく
良好なＴＩＧ溶接ができることが確認できた。 シールドガスとして、Ｈ2ガス（２〜９容量％）＋
残部Ｈeガスの２種混合ガスを使用して、オーステナイ
ト系ステンレス鋼をＴＩＧ溶接すると、溶接速度を１０
０ｃｍ／ｍｉｎに高めても、ハンピング現象が発生する
ことなく良好なＴＩＧ溶接ができることが確認できた。
なお、上記した〜項の水素の上限を９％としたが、
水素の濃度が９％より多くても溶接性の点では問題はな
い。但し、水素が９％を越えて９.５％以上になると、
大気中に放出した時に水素の爆発範囲となる可能性があ
るため、安全上の点から水素９％以下とすることが望ま
しい。He gas (90
When the austenitic stainless steel is TIG-welded using a mixed gas of three types of + 2 % by volume + H2 gas (3 to 9% by volume) + Ar gas, the welding speed is 120 cm / mi.
It was confirmed that even when the value was increased to n or more, good TIG welding could be performed without occurrence of a humping phenomenon. H 2 gas (2 to 9% by volume) + as a shielding gas
When austenitic stainless steel is TIG-welded using a mixture of two types of He gas, the welding speed becomes 10
It was confirmed that even when the pressure was increased to 0 cm / min, good TIG welding could be performed without a humping phenomenon.
In addition, although the upper limit of hydrogen of the above-mentioned item was set to 9%,
Even if the concentration of hydrogen is more than 9%, there is no problem in terms of weldability. However, when hydrogen exceeds 9% and becomes 9.5% or more,
Since the explosion of hydrogen may occur when released into the atmosphere, it is desirable to set the hydrogen content to 9% or less from the viewpoint of safety.
【００１７】又、上記した実施例１では、溶接電流とし
て２００Ａで溶接した例について説明したが、本発明は
これに限定されるものでなく、溶接電流は用途や目的に
合わせて適宜設定して使用するようにすれば良いことは
勿論である。又、上記実施例１では、板厚６ｍｍの母材
を使用して行ったが、いずれの板厚、においても、シー
ルドガスの組成と溶接速度との関係は変化がないもので
ある。なお又、溶接する継手の種類も、重ね継手の溶
接、Ｔ型継手の溶接や、突き合わせ継手の溶接等に適用
し得ることも勿論である。In the first embodiment, an example was described in which welding was performed at a welding current of 200 A. However, the present invention is not limited to this, and the welding current is appropriately set according to the application and purpose. Needless to say, it can be used. In the first embodiment, the base material having a plate thickness of 6 mm was used. However, the relationship between the composition of the shielding gas and the welding speed did not change at any plate thickness. In addition, it goes without saying that the type of joint to be welded can be applied to welding of a lap joint, welding of a T-shaped joint, welding of a butt joint, and the like.
【００１８】[0018]
【発明の効果】本発明のオーステナイト系ステンレス鋼
用高速ＴＩＧ溶接法は、上記した如き形態で実施され、
以下の如き効果を奏する。本発明の高速ＴＩＧ溶接では
シールドガスとして、上記した如き［Ｈeガス＋Ｈ2ガス
＋Ａrガス］の３種混合ガス、又は［Ｈeガス＋Ｈ2ガ
ス］の２種混合ガスをを用いることにより、既存のＡr
ガス単体等の溶接用シールドガスに比べて溶け込みを増
す作用が著しく向上すると共に、アーク圧力を低下させ
ることができるため、ハンピング等のビード不整が生じ
ることがなく、更にはアンダーカットも発生し難く、高
品質を保持したＴＩＧ溶接の高速度化を図ることができ
る。The high-speed TIG welding method for austenitic stainless steel according to the present invention is carried out in the above-described form.
The following effects are obtained. In the high-speed TIG welding of the present invention, as a shielding gas, the above-mentioned three kinds of mixed gas of [He gas + H 2 gas + Ar gas] or the two kinds of mixed gas of [He gas + H 2 gas] are used. Ar
The effect of increasing penetration is significantly improved as compared with a welding shield gas such as a single gas, and the arc pressure can be reduced, so that bead irregularities such as humping do not occur, and furthermore, undercuts are less likely to occur. In addition, it is possible to increase the speed of TIG welding while maintaining high quality.
Claims (6)
未満のＨeガス、８〜９容量％のＨ2ガス、残部Ａrガス
である３種混合ガスをシールドガスとして用いて、非消
耗電極によって、オーステナイト系ステンレス鋼を４０
ｃｍ／ｍｉｎ以上の溶接速度でＴＩＧ溶接することを特
徴とするオーステナイト系ステンレス鋼用高速ＴＩＧ溶
接法。1. The gas composition is at least 30% by volume and at least 40% by volume.
He gas of less than, using 8-9% by volume of H 2 gas, a 3-component mixture gas the balance Ar gas as a shielding gas, by a non-consumable electrode, the austenitic stainless steel 40
A high-speed TIG welding method for austenitic stainless steel, wherein TIG welding is performed at a welding speed of not less than cm / min.
未満のＨeガス、６〜９容量％のＨ2ガス、残部Ａrガス
である３種混合ガスをシールドガスとして用いて、非消
耗電極によって、オーステナイト系ステンレス鋼を４０
ｃｍ／ｍｉｎ以上の溶接速度でＴＩＧ溶接することを特
徴とするオーステナイト系ステンレス鋼用高速ＴＩＧ溶
接法。2. The gas composition has a volume ratio of 40% by volume or more and 50% by volume or more.
Less than 40% austenitic stainless steel by a non-consumable electrode using less than He gas, 6 to 9% by volume of H 2 gas, and the balance of Ar gas as a shielding gas.
A high-speed TIG welding method for austenitic stainless steel, wherein TIG welding is performed at a welding speed of not less than cm / min.
未満のＨeガス、５〜９容量％のＨ2ガス、残部Ａrガス
である３種混合ガスをシールドガスとして用いて、非消
耗電極によって、オーステナイト系ステンレス鋼を４０
ｃｍ／ｍｉｎ以上の溶接速度でＴＩＧ溶接することを特
徴とするオーステナイト系ステンレス鋼用高速ＴＩＧ溶
接法。3. The gas composition is at least 50% by volume and at least 70% by volume.
Less than He gas, 5 to 9% by volume of H 2 gas, and a balance of Ar gas as a shielding gas, and a non-consumable electrode is used to form 40% of austenitic stainless steel.
A high-speed TIG welding method for austenitic stainless steel, wherein TIG welding is performed at a welding speed of not less than cm / min.
未満のＨeガス、４〜９容量％のＨ2ガス、残部Ａrガス
である３種混合ガスをシールドガスとして用いて、非消
耗電極によって、オーステナイト系ステンレス鋼を４０
ｃｍ／ｍｉｎ以上の溶接速度でＴＩＧ溶接することを特
徴とするオーステナイト系ステンレス鋼用高速ＴＩＧ溶
接法。4. The gas composition is not less than 70% by volume and not more than 90% by volume.
Less than He gas, 4 to 9% by volume of H 2 gas, and the balance of Ar gas are used as shielding gas, and austenitic stainless steel is reduced to 40% by a non-consumable electrode.
A high-speed TIG welding method for austenitic stainless steel, wherein TIG welding is performed at a welding speed of not less than cm / min.
ス、３〜９容量％のＨ2ガス、残部Ａrガスである３種混
合ガスをシールドガスとして用いて、非消耗電極によっ
て、オーステナイト系ステンレス鋼を４０ｃｍ／ｍｉｎ
以上の溶接速度でＴＩＧ溶接することを特徴とするオー
ステナイト系ステンレス鋼用高速ＴＩＧ溶接法。5. An austenitic system using a non-consumable electrode by a non-consumable electrode using a gas mixture having a gas composition of 90% by volume or more of He gas, 3 to 9% by volume of H 2 gas, and a balance of Ar gas as a shielding gas. 40cm / min stainless steel
A high-speed TIG welding method for austenitic stainless steel, wherein TIG welding is performed at the above welding speed.
残部Ｈeガスである２種混合ガスをシールドガスとして
用いて、非消耗電極によって、オーステナイト系ステン
レス鋼を４０ｃｍ／ｍｉｎ以上の溶接速度でＴＩＧ溶接
することを特徴とするオーステナイト系ステンレス鋼用
高速ＴＩＧ溶接法。6. A H 2 gas having a gas composition of 2 to 9% by volume,
High-speed TIG welding for austenitic stainless steel, wherein austenitic stainless steel is TIG-welded at a welding speed of 40 cm / min or more by a non-consumable electrode using a mixture gas of two kinds, the remaining He gas, as a shielding gas. Law.
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|---|---|---|---|
| JP2000342142A JP3623442B2 (en) | 2000-04-11 | 2000-11-09 | High-speed TIG welding method for austenitic stainless steel |
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|---|---|---|---|
| JP2000-109727 | 2000-04-11 | ||
| JP2000109727 | 2000-04-11 | ||
| JP2000342142A JP3623442B2 (en) | 2000-04-11 | 2000-11-09 | High-speed TIG welding method for austenitic stainless steel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012017913A1 (en) * | 2010-08-05 | 2012-02-09 | 大陽日酸株式会社 | Complex weld method and welding torch for complex welds |
| WO2013118865A1 (en) * | 2012-02-08 | 2013-08-15 | 大陽日酸株式会社 | Composite welding method and welding torch for composite welding |
| CN111822822A (en) * | 2020-06-16 | 2020-10-27 | 山西汾西机电有限公司 | Welding method and system for austenitic stainless steel |
-
2000
- 2000-11-09 JP JP2000342142A patent/JP3623442B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012017913A1 (en) * | 2010-08-05 | 2012-02-09 | 大陽日酸株式会社 | Complex weld method and welding torch for complex welds |
| US20130299463A1 (en) * | 2010-08-05 | 2013-11-14 | Taiyo Nippon Sanso Corporation | Hybrid welding method and welding torch for hybrid welding |
| JP5589079B2 (en) * | 2010-08-05 | 2014-09-10 | 大陽日酸株式会社 | Composite welding method |
| WO2013118865A1 (en) * | 2012-02-08 | 2013-08-15 | 大陽日酸株式会社 | Composite welding method and welding torch for composite welding |
| JP2013158826A (en) * | 2012-02-08 | 2013-08-19 | Taiyo Nippon Sanso Corp | Method of composite welding and welding torch for composite welding |
| US9925622B2 (en) | 2012-02-08 | 2018-03-27 | Taiyo Nippon Sanso Corporation | Hybrid welding method and welding torch for hybrid welding |
| CN111822822A (en) * | 2020-06-16 | 2020-10-27 | 山西汾西机电有限公司 | Welding method and system for austenitic stainless steel |
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| JP3623442B2 (en) | 2005-02-23 |
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