JPS5829581A - 3 component shielding or restraining gaseous mixture - Google Patents
3 component shielding or restraining gaseous mixtureInfo
- Publication number
- JPS5829581A JPS5829581A JP12776081A JP12776081A JPS5829581A JP S5829581 A JPS5829581 A JP S5829581A JP 12776081 A JP12776081 A JP 12776081A JP 12776081 A JP12776081 A JP 12776081A JP S5829581 A JPS5829581 A JP S5829581A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- welding
- gaseous
- hydrogen
- restraining
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はアルゴンガス、水素ガス及びヘリウムガスの３
成分からなり、被包ガス又は拘束ガスとして自動、手動
併用の不活性ガス被包タングステン溶接法（Ｔ Ｉ Ｇ
）又はプラズマ溶接に用いる混合ガスに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides three
tungsten welding method with automatic and manual inert gas encapsulation (TIG).
) or a mixed gas used for plasma welding.
普通鋼、不銹鋼又は低合金鋼の溶接における被包ガスは
アルゴンガスが最も多く用いられている。Argon gas is most often used as the encapsulating gas in welding ordinary steel, stainless steel, or low alloy steel.
アルゴンがスが多用される理由は、溶接施工時における
アーム長及び溶接電流の設定範囲の変化に対応１−で溶
接結果への影響が緩慢であり、溶接作業者の技量差に左
右される度合いが小さいことに起因にていることが知ら
れている。The reason why argon is often used is that it responds to changes in the arm length and welding current setting range during welding, and its effect on welding results is slow, and the degree to which it is influenced by differences in the skill of the welding operator. It is known that this is due to the small size of the
一方、アルゴンガスに代えてヘリウムガス、アルゴンガ
スと６０〜８０チのヘリウムガスどの混合ガス、又はア
ルゴンガスと５〜５５チの水素ガスとの混合ガス等の被
包ガスがＴＩＧ溶接又はプラズマ溶接に用いられている
。On the other hand, instead of argon gas, an encapsulated gas such as helium gas, a mixture of argon gas and 60 to 80 inches of helium gas, or a mixture of argon gas and 5 to 55 inches of hydrogen gas is used for TIG welding or plasma welding. It is used in
前述の如きヘリウムガスリッチの被包ガス及び５〜６５
％水素ガスとアルゴンガスとの混合組成の被包ガスの場
合は、溶接機の電弧電圧の高いものを用いないとアーク
スタートが困難であり、溶看金絹の溶は込みも大きく被
溶接材が薄板の場合の溶接では溶は落ちの発生頻度が高
くなることが知られて込る０従って、被溶接材の板厚は
２．３ ｎｕｎ以上か、又は溶接条件の設定変動因子の
少ない高速自動ＴＩＧ溶接の被包ガスや、プラズマ溶接
、プラズマ切断の拘束ガス等に限定して用いられている
現状である。Helium gas-rich encapsulation gas as described above and 5 to 65
In the case of an encapsulated gas with a mixed composition of % hydrogen gas and argon gas, it is difficult to start the arc unless a welding machine with a high arc voltage is used, and the melt penetration of the molten metal silk is large and the material to be welded is It is known that melt drop occurs more frequently when welding thin plates. Therefore, the thickness of the material to be welded must be 2.3 nun or more, or the welding conditions must be set at a high speed with few variables. Currently, it is used only as an encapsulating gas for automatic TIG welding, a restraining gas for plasma welding, plasma cutting, etc.
前述の如き観点から本発明者は種々検討かつ実験の結果
、本発明の開発に成功したものであり、本発明の要旨と
するところは前記特許請求の範囲各項に明記したとおり
であるが、更に本発明について具体的に説明する。From the above-mentioned viewpoint, the present inventor has succeeded in developing the present invention as a result of various studies and experiments, and the gist of the present invention is as specified in each of the claims above. Further, the present invention will be specifically explained.
本発明はアルゴンガスと水素ガスとの混合ガス中の水素
ガスの一部をヘリウムガスで置換した三成分系の混合ガ
スとＬまたものである。The present invention is also a ternary mixed gas in which a part of the hydrogen gas in the mixed gas of argon gas and hydrogen gas is replaced with helium gas.
従来、水素に起因する溶接欠陥を防止するために、ヘリ
ウムガスペースでアルゴンガスを添加１゜た混合ガスが
用いられているが、我が国においてはヘリウムガスが高
価なためにこの種混合ガスは必然的に高価な混合ガスと
なυ、厚板のアルミ材や不銹鋼、低合金鋼の一部に限定
されて用いらねているにすぎない。Conventionally, in order to prevent welding defects caused by hydrogen, a mixed gas with 1° of argon gas added in a helium gas space has been used, but in Japan, this type of mixed gas is unavoidable because helium gas is expensive. Because it is an expensive mixed gas, its use is limited to some parts of thick aluminum, stainless steel, and low-alloy steel.
Ｌ７かるに本発明では、アルゴン」−水素混合ガスの水
素ガス含有量を水素に起因する溶接欠陥の発生内に制限
し、溶接速度、溶は込みの改善のためにヘリウムガスに
より水素ガスの一部ヲ置換するものであるが、その置換
率は水素ガス１チに該当するヘリウムガス含有量は略１
５チである。However, in the present invention, the hydrogen gas content of the argon-hydrogen mixed gas is limited to within the range of occurrence of welding defects caused by hydrogen, and the hydrogen gas is replaced by helium gas in order to improve welding speed and penetration. The replacement rate is that the helium gas content corresponding to 1 liter of hydrogen gas is approximately 1.
It is 5chi.
従って、Ａｒ ＋ ０．５−５．０ ％ Ｈ２＋ １５
−６０％Ｈｅの検便ガスけＡｒ 十Ｈ２混合ガスに換算
すればＡｒ＋１．５〜９チＨ２混合ガスとはソＸ−の溶
接速度、溶は込みの改善効果を、水素に起因する欠陥の
ない状態で用いることができる。又、別の見方をすれば
前記３成分混合ガスと略同−の改善幼芽をうるためのＡ
ｒ ＋ＩＩ６混合ガスを得るためには高価なへ’Ｊ ラ
ムに−２０〜１００％の含有ｔとする必要がある。Therefore, Ar + 0.5-5.0% H2+ 15
- 60% He stool gas Ar If converted to 10 H2 mixed gas, Ar + 1.5 ~ 9 H2 mixed gas is So Can be used in any state. In addition, from another perspective, A for obtaining improved seedlings that are approximately the same as the three-component mixed gas mentioned above.
In order to obtain the r+II6 mixed gas, it is necessary to make the content of -20 to 100% t into the expensive He'J ram.
例えば、Ａｒ ＋２チＨ２＋３０％Ｆ１． 混合ガス
ど同一の溶接効果を得るにはＡｒ ＋６０ ％ Ｈｅ混
合ガスとなるが、Ａｒ ＋ ６０ ％ Ｈｅ混合ガスに
比較してＡｒ ＋ ２４ Ｈ２＋３ Ｄ ％ Ｈｅ
混合ガスはガス比重が前者に比（〜で１・６倍であり、
被包効果が大きいので全姿勢溶接においてＡｒ ＋６０
条Ｈｅ混合ガスの６５％の流台で、従って少流旦で同一
の被包効果を得ることができる。For example, Ar + 2chi H2 + 30% F1. To obtain the same welding effect as a mixed gas, a mixed gas of Ar + 60% He is required, but compared to a mixed gas of Ar + 60% He, a mixed gas of Ar + 24 H2 + 3 D% He is used.
The gas specific gravity of the mixed gas is 1.6 times that of the former (~1.6 times,
Ar +60 in all position welding due to the large encapsulation effect
The same encapsulation effect can be obtained with a flow rate of 65% of the He mixed gas and thus with a lower flow rate.
アルジンガス却味、Ａｒ 十Ｈ２＋ Ｈｅ 混合ガス
及びＡｒ ＋ Ｈｅ混合ガスを用いたオーステナイト未
成Ｕ ７−１１− ライト系鋼材のＴＩＧ溶接及びプラ
ズマ溶接による溶接金属の機緘的性質を表１及び２に示
す。Tables 1 and 2 show the mechanical properties of weld metal obtained by TIG welding and plasma welding of unaustenitic U7-11-lite steel materials using aldine gas cooling, Ar + He mixed gas, and Ar + He mixed gas. .
本発明は以上詳述１−た如き構成からなるＴＩＧ又はプ
ラズマ溶接用の被包又は拘束混合ガスであって、奏せら
れる作用効果を挙げれば次のとおりである：
ｆｌｌ 本発明の被包ガスの電位傾度はＡｒ に近
い電位傾度であり、従来のＡｒ ガス使用溶接機を改
造することなしに使用し得、アークのスタートが容易で
ある。The present invention is an encapsulated or restricted mixed gas for TIG or plasma welding having the configuration as detailed above in 1-1, and the effects achieved are as follows: fll The encapsulated gas of the present invention The potential gradient is close to that of Ar 2 , and a conventional welding machine using Ar 2 gas can be used without modification, and the arc can be easily started.
（２） 板厚０・４ｍ以上の不銹鋼、普通鋼、低合金
鋼の手動及び自動ＴＩＧ溶接及びプラズマ手動溶接がで
きる。尚、手動溶接における溶接速度は技量により異な
るが、一般に１〜５０ｔフｎ ７分であり、自動溶接は
溶接条件の設定変更因子が少ないので任意に設定が可能
である。(2) Capable of manual and automatic TIG welding and manual plasma welding of stainless steel, ordinary steel, and low alloy steel with a plate thickness of 0.4 m or more. Although the welding speed in manual welding varies depending on the skill, it is generally 1 to 50 tons/7 minutes, and in automatic welding, there are few factors that change the settings of welding conditions, so it can be set arbitrarily.
ｉ３１ Ａｒ ガスに比較して、同一溶接電流値に
おいて１５〜１００％の溶接施工速度の増大が、優れた
継手の機械的性能、外観、裏波の形成と共に達成できる
。Compared to i31 Ar gas, an increase in welding speed of 15-100% at the same welding current value can be achieved with superior joint mechanical performance, appearance, and underwave formation.
（４） オーステナイト系鋼材に比較してフェライト
系鋼材は溶接入熱量の増加によって溶着部の結晶が粗大
化し、溶着部の機械的性能を著しく低下させることが知
られている。本発明混合ガスを被包ガスとして用いた場
合は、溶接が難しいとさｊｌているフェライト系溶接材
においても表３及び４に示す如く安定Ｉ−だ機緘的特性
、溶接速度の改善と共に溶接製品の歪も少なくすること
ができることが判明し７た。(4) Compared to austenitic steel materials, it is known that in ferritic steel materials, the crystals in the weld zone become coarser due to an increase in welding heat input, which significantly reduces the mechanical performance of the weld zone. When the mixed gas of the present invention is used as the encapsulating gas, even ferritic welding materials, which are difficult to weld, can be welded stably, with improvements in mechanical properties and welding speed, as shown in Tables 3 and 4. It has been found that distortion of the product can also be reduced.
尚、表３はフェライト系鋼材のＴＩＧ溶接における本発
明３成分混合ガスとＡｒ ガスとを被包ガスとし−で
夫々用いた場合の溶接速度を対比した１例を示し、第４
表はフェライト系鋼材のＴＩＧ溶接における本発明３成
分混合ガスと巾及びその機械的性能を対比して゛示すも
のである。Table 3 shows an example comparing the welding speeds when the three-component mixed gas of the present invention and Ar gas are used as encapsulating gases in TIG welding of ferritic steel materials.
The table compares the width and mechanical performance of the three-component mixed gas of the present invention in TIG welding of ferritic steel materials.
一般に薄板の溶接では、被溶接材強度に近い溶着部、即
ち継手部の機械的強度を得るには、裏波のビード巾（裏
ビードｔ１］）を被溶接材の板厚の１〜１．５倍の範囲
に管理する必要がある。Generally, when welding thin plates, in order to obtain a mechanical strength of the welded part, that is, a joint, close to the strength of the material to be welded, the bead width of the back wave (back bead t1) must be set to 1 to 1. It is necessary to manage it within a range of 5 times.
表ビード巾を略一定に設定した状態でも溶は込み指数（
表ビード巾／裏ピード巾）がＡｒ ガスの場合は２前後
であり、かつバラツキがあるのに対し、本発明混合ガス
の場合は１・５前後とバラツキが少なく改善できる。薄
板に限らず実際の溶接製品が円筒形状又は箱形のものに
おいては、内側に形成した裏波及び裏ビード巾を目視で
きないことが多い。址たＡｒ ７１スのように溶は込
み指数の大きい被包ガスにおいては、薄板においても濡
れ特性が高く表ビード巾は広くなるが、反面裏波が出に
くく、かつパラツギも太きく表ビード巾によって裏ビー
ドを管理することが困難である。しかし、本発明混合ガ
スでは溶は込み指数のバラツキが少なく表ビード巾によ
る裏ビード巾の管理も容易であり生産性が向上できる。Even when the front bead width is set approximately constant, the penetration index (
In the case of Ar gas, the ratio (front bead width/back bead width) is around 2, and there is some variation, whereas in the case of the mixed gas of the present invention, it is around 1.5, with little variation and can be improved. Not only thin plates but also actual welded products that are cylindrical or box-shaped, it is often impossible to visually see the inner corrugation and the width of the bead formed on the inside. When using an encapsulated gas with a large penetration index, such as Ar 71, the wetting properties are high even in thin sheets, and the front bead width is wide, but on the other hand, it is difficult for back waves to appear, and the cracks are also thick, making the front bead width wide. It is difficult to manage the back bead due to the However, with the mixed gas of the present invention, there is little variation in the penetration index, and it is easy to control the back bead width based on the front bead width, and productivity can be improved.
（５） 被浴接材としては各棟不銹鋼、普通鋼、低合
金鋼に水素脆化及び溶接欠陥のない状態で用いることが
できる。(5) As a welding material to be bathed, it can be used in stainless steel, ordinary steel, and low alloy steel without hydrogen embrittlement or welding defects.
（６１ソラズマ溶接では、プラズマガス（ノヤイロット
アークガス）ＶＣ拘束ガスと同柚のガスを用いることが
でき、施工速度の増大と共に溶接製品の品質の向上が削
れる。(In 61 Solasma welding, plasma gas (Noyairot arc gas) and the same gas as VC restraint gas can be used, increasing the construction speed and improving the quality of welded products.
Claims (1)
はプラズマ溶接用の０．５〜５．０％水素ガス及び１５
〜６０ｑ６ヘリウムガスと残部アルゴンガスとからなる
３成分彼包又は拘束混合ガス。0.5-5.0% hydrogen gas and 15 for automatic and manual inert gas encapsulated tungsten welding or plasma welding
A three-component enclosed or restricted mixed gas consisting of ~60q6 helium gas and the remainder argon gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12776081A JPS5829581A (en) | 1981-08-17 | 1981-08-17 | 3 component shielding or restraining gaseous mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12776081A JPS5829581A (en) | 1981-08-17 | 1981-08-17 | 3 component shielding or restraining gaseous mixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5829581A true JPS5829581A (en) | 1983-02-21 |
Family
ID=14968006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12776081A Pending JPS5829581A (en) | 1981-08-17 | 1981-08-17 | 3 component shielding or restraining gaseous mixture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5829581A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0523615A2 (en) * | 1991-07-15 | 1993-01-20 | Nippon Steel Corporation | Method of welding nickel or nickel alloy products |
| WO1999022901A1 (en) * | 1997-11-03 | 1999-05-14 | Messer Griesheim Gmbh | Protective gas for tig welding |
| FR2772013A1 (en) * | 1997-12-10 | 1999-06-11 | Air Liquide | TERNAIRE GAS MIXTURE AND APPLICATION OF THIS MIXTURE TO PLASMA SPRAYING OF REFRACTORY MATERIALS |
| JP2000516148A (en) * | 1996-08-12 | 2000-12-05 | ティーアールアイ・トゥール・インコーポレーテッド | Welding method |
| FR2813598A1 (en) * | 2000-09-06 | 2002-03-08 | Air Liquide | PLASMA PROJECTION WITH TERNARY GAS MIXTURE |
| US6940034B2 (en) * | 1997-03-20 | 2005-09-06 | Tadahiro Ohmi | Long life welding electrode and its fixing structure, welding head, and welding method |
| EP1707295A1 (en) * | 2005-03-31 | 2006-10-04 | Messer Group GmbH | Shielding gas for TIG-welding of metals |
| CN103111722A (en) * | 2013-02-21 | 2013-05-22 | 上海电气核电设备有限公司 | Method for welding tubes with tube sheets under protection action of mixed gas |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS546830A (en) * | 1977-06-20 | 1979-01-19 | Matsushita Electric Ind Co Ltd | Tig arc welding method |
| JPS5666382A (en) * | 1979-10-30 | 1981-06-04 | Daido Steel Co Ltd | Shielding gas for welding |
-
1981
- 1981-08-17 JP JP12776081A patent/JPS5829581A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS546830A (en) * | 1977-06-20 | 1979-01-19 | Matsushita Electric Ind Co Ltd | Tig arc welding method |
| JPS5666382A (en) * | 1979-10-30 | 1981-06-04 | Daido Steel Co Ltd | Shielding gas for welding |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5347098A (en) * | 1991-07-15 | 1994-09-13 | Nippon Steel Corporation | Method of welding nickel or nickel alloy products |
| EP0664181A1 (en) * | 1991-07-15 | 1995-07-26 | Nippon Steel Corporation | Method of welding nickel or nickel alloy products |
| EP0523615A2 (en) * | 1991-07-15 | 1993-01-20 | Nippon Steel Corporation | Method of welding nickel or nickel alloy products |
| JP2000516148A (en) * | 1996-08-12 | 2000-12-05 | ティーアールアイ・トゥール・インコーポレーテッド | Welding method |
| US6940034B2 (en) * | 1997-03-20 | 2005-09-06 | Tadahiro Ohmi | Long life welding electrode and its fixing structure, welding head, and welding method |
| WO1999022901A1 (en) * | 1997-11-03 | 1999-05-14 | Messer Griesheim Gmbh | Protective gas for tig welding |
| EP0924968A1 (en) * | 1997-12-10 | 1999-06-23 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Ternary gas compound and its application to refractory material plasma spraying |
| US6265687B1 (en) | 1997-12-10 | 2001-07-24 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Method of using a ternary gaseous mixture in the plasma projection of refractory materials |
| FR2772013A1 (en) * | 1997-12-10 | 1999-06-11 | Air Liquide | TERNAIRE GAS MIXTURE AND APPLICATION OF THIS MIXTURE TO PLASMA SPRAYING OF REFRACTORY MATERIALS |
| FR2813598A1 (en) * | 2000-09-06 | 2002-03-08 | Air Liquide | PLASMA PROJECTION WITH TERNARY GAS MIXTURE |
| WO2002020399A1 (en) * | 2000-09-06 | 2002-03-14 | L'air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude | Plasma spray with ternary gas mixture |
| EP1707295A1 (en) * | 2005-03-31 | 2006-10-04 | Messer Group GmbH | Shielding gas for TIG-welding of metals |
| CN103111722A (en) * | 2013-02-21 | 2013-05-22 | 上海电气核电设备有限公司 | Method for welding tubes with tube sheets under protection action of mixed gas |
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