JPS61111780A - Welding method - Google Patents
Welding methodInfo
- Publication number
- JPS61111780A JPS61111780A JP23324984A JP23324984A JPS61111780A JP S61111780 A JPS61111780 A JP S61111780A JP 23324984 A JP23324984 A JP 23324984A JP 23324984 A JP23324984 A JP 23324984A JP S61111780 A JPS61111780 A JP S61111780A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- welding
- nozzle
- active
- 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.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 7
- 239000007789 gas Substances 0.000 claims abstract description 44
- 239000011261 inert gas Substances 0.000 claims abstract description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 239000011324 bead Substances 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 6
- 238000002156 mixing Methods 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- -1 OQ or OQ is supplied Substances 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
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
- B23K9/164—Arc welding or cutting making use of shielding gas making use of a moving fluid
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】
〔産業上の利用分野〕
本発明は、溶接方法に関し、詳しくはアーク安定化のた
めにシールドガスとして不活性ガス中に少量の０２やＯ
Ｑ、等の活性ガスを含ませた混合ガスを供給してステン
レス鋼のＭＩＧ溶接を行うに際し、該活性ガスによる溶
接部の酸化スケール等の減少を図った溶接方法に関する
。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a welding method, and more specifically, a small amount of 02 or O2 is added to an inert gas as a shielding gas to stabilize the arc.
The present invention relates to a welding method in which MIG welding of stainless steel is performed by supplying a mixed gas containing an active gas such as Q, in which oxidation scale, etc. in the welded part due to the active gas is reduced.
第５図とそのＡ−Ａ線断面図である第６図に示すように
、従来のＭｉＧ溶接用トーチは、シールドノズル６、通
電チップ２、溶接ワイヤー１の組合せで構成されている
。このトーチでステンレスＭＩＧ溶接を行う場合、一般
にシールドガス５はアーク安定のためＡｒ ガス中に
少量のＯｌガス又はＯＯｓガスなどの活性ガスを混合さ
せて使用する。２ＸＯ３入りＡｒガスを使用した場合、
酸化スケールが溶接表面に生成して付着するスケール等
は高融点であシ、多層溶接等の場合には溶融金属の中に
溶接欠陥として介在し溶接品質を損う。また、次層を溶
接する場合にはグラインダー等により表面に付着した酸
化スケールを除去しなければならない。As shown in FIG. 5 and FIG. 6, which is a cross-sectional view taken along line A-A, the conventional MiG welding torch is composed of a combination of a shield nozzle 6, a current-carrying tip 2, and a welding wire 1. When performing stainless steel MIG welding with this torch, the shielding gas 5 is generally a mixture of Ar gas and a small amount of active gas such as Ol gas or OOs gas to stabilize the arc. When using Ar gas containing 2XO3,
Oxidized scale that forms and adheres to the welding surface has a high melting point, and in the case of multi-layer welding, it intervenes in the molten metal as welding defects and impairs welding quality. Furthermore, when welding the next layer, oxide scale adhering to the surface must be removed using a grinder or the like.
本発明は、上記酸化スケールの弊害を除き、ステンレス
の溶接の品質向上を目的としてなされたものである。The present invention has been made for the purpose of eliminating the above-mentioned adverse effects of oxide scale and improving the quality of stainless steel welding.
すなわち本発明は、ステンレス鋼のＭｉＧ溶接において
、シールドガス供給ノズルを２重構造として内筒側から
数％の活性ガス入シの混合ガスを溶接ワイヤの外周部に
供給し、外筒側から不活性ガスを供給し、全体のシール
ドガス量の活性ガス混合率を０．１Ｘ以下に抑え得るこ
とを特徴とする溶接方法に関するものである。That is, in MiG welding of stainless steel, the present invention has a shield gas supply nozzle with a double structure, and a mixed gas containing several percent of active gas is supplied to the outer circumference of the welding wire from the inner cylinder side, and a mixed gas containing several percent of active gas is supplied from the outer cylinder side. The present invention relates to a welding method characterized in that an active gas is supplied and the active gas mixing ratio of the total amount of shielding gas can be suppressed to 0.1X or less.
本発明は、
１）シールドガスを、アーク安定化を目的としたシール
ドガスと、大気による酸化や窒化を防止するだめのシー
ルドガスとに区別して供給する点、
２）上記の供給は、二重ノズル構造とし、内筒側からは
不活性ガスに０．又はＯＱ、などの活性ガスを少量混合
した混合ガスを供給し、外筒側からは不活性ガスを供給
することにより行う点、
を要点とするものである。The present invention has the following features: 1) The shielding gas is supplied separately into a shielding gas for the purpose of arc stabilization and a shielding gas for preventing oxidation and nitridation caused by the atmosphere, and 2) The above supply is double-sourced. It has a nozzle structure, and inert gas is supplied from the inner cylinder side. The main point is that a mixed gas containing a small amount of active gas such as OQ or OQ is supplied, and an inert gas is supplied from the outer cylinder side.
本発明は、原子力機器、化工機等に適用することができ
る。The present invention can be applied to nuclear power equipment, chemical engineering equipment, etc.
以下、図面を参照して本発明の詳細な説明する。Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図とその人−ム線断面図である第２図は本発明を一
般用溶接トーチにより、第５図とその断面図である第４
図は本発明を狭開先用溶接トーチによりそれぞれ実施す
る場合の一例を示す図である。FIG. 1 and FIG. 2, which is a sectional view taken along the human line, show the present invention using a general welding torch. FIG. 5 and FIG. 4, which is a sectional view thereof.
The figures are diagrams showing an example of the case where the present invention is implemented using a narrow gap welding torch.
第１〜４図において、１は溶接ワイヤーを示し、２は通
電チップ、３は外筒ノズル、４は内筒ノズル、７が溶接
アーク、８は溶融プール、９は溶接ビードを示す。内筒
ノズル４から不活性ガスにＯ３あるいはＯＱ、々どの活
性ガスを少量含む混合ガス６を溶接アーク７の周囲に噴
射させて溶接アーク７の安定化を図ると共に、外筒ノズ
ル３から不活性ガス５を噴射させて溶接ビード９の表面
の酸化スケール及び酸化クロム等のスケールを少なくす
る。なお、アーク７０安定化のために局部的に活性ガス
雰囲気が必要であるが、溶融金属（すなわち溶融ブール
８）はアーク７点より後方と力るので、後方に不活性ガ
ス５を流すことによシ、溶融金属の酸化が防止されるの
である。In Figs. 1 to 4, 1 indicates a welding wire, 2 a current-carrying tip, 3 an outer tube nozzle, 4 an inner tube nozzle, 7 a welding arc, 8 a molten pool, and 9 a weld bead. A mixed gas 6 containing an inert gas and a small amount of active gas such as O3 or OQ is injected from the inner cylinder nozzle 4 around the welding arc 7 to stabilize the welding arc 7, and an inert gas is injected from the outer cylinder nozzle 3 around the welding arc 7. Gas 5 is injected to reduce oxide scale and scale such as chromium oxide on the surface of weld bead 9. Note that an active gas atmosphere is required locally to stabilize the arc 70, but since the molten metal (that is, the molten boule 8) is forced backwards from the arc 7 point, it is necessary to flow the inert gas 5 backward. Additionally, oxidation of the molten metal is prevented.
以上のように本発明は、ステンレス鋼のガスメタルアー
ク溶接における溶接アークの安定化に対しては０宜 あ
るいはＯＱ、入りの混合ガスをアーク周辺に流し、溶融
金属が凝固冷却過程にあるビードに対しては不活性ガス
が覆うようにしたものであり、これによシ、全体の活性
ガスの混合率をＱ、１に以下に抑えることとなり、はと
んど不活性ガス雰囲気で安定した溶接が可能となり、酸
化皮膜のないビードが形成できる。As described above, the present invention aims to stabilize the welding arc in gas metal arc welding of stainless steel by flowing a mixed gas containing 0% or OQ around the arc, and applying it to the bead where the molten metal is solidifying and cooling. This is done so that the overall active gas mixture ratio is kept below Q, 1, which allows for stable welding in an inert gas atmosphere. This makes it possible to form beads without an oxide film.
第１図は本発明を一般用溶接トーチによυ実施する場合
の一例を示す図、第２図は第１図のムーＡ断面図、第３
図は本発明を狭開先用溶接トーチにより実施する場合の
一例を示す図、第４図は第３図の断面図である。また、
第５図は従来のＭｉＧ溶接用トーチを示す図、第６図は
第１図のＡ−Ａ断面図である。
復代理人 内 １） 明
復代理人 萩 原 亮 −
第５図Fig. 1 is a diagram showing an example of the case where the present invention is implemented with a general welding torch, Fig. 2 is a cross-sectional view of MuA in Fig. 1, and Fig.
The figure shows an example of the case where the present invention is implemented using a narrow gap welding torch, and FIG. 4 is a sectional view of FIG. 3. Also,
FIG. 5 is a diagram showing a conventional MiG welding torch, and FIG. 6 is a sectional view taken along the line AA in FIG. 1. Sub-Agent 1) Meifu Agent Ryo Hagiwara - Figure 5
Claims (1)
ノズルを２重構造として内筒側から数％の活性ガス入り
の混合ガスを溶接ワイヤの外周部に供給し、外筒側から
不活性ガスを供給し、全体のシールドガス量の活性ガス
混合率を０．１％以下に抑え得ることを特徴とする溶接
方法。In MiG welding of stainless steel, the shield gas supply nozzle has a double structure, and a mixed gas containing several percent of active gas is supplied to the outer periphery of the welding wire from the inner cylinder side, and an inert gas is supplied from the outer cylinder side. A welding method characterized in that the active gas mixture ratio in the total amount of shielding gas can be suppressed to 0.1% or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23324984A JPS61111780A (en) | 1984-11-07 | 1984-11-07 | Welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23324984A JPS61111780A (en) | 1984-11-07 | 1984-11-07 | Welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61111780A true JPS61111780A (en) | 1986-05-29 |
Family
ID=16952109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23324984A Pending JPS61111780A (en) | 1984-11-07 | 1984-11-07 | Welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61111780A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010046677A (en) * | 2008-08-19 | 2010-03-04 | Osaka Univ | Gma welding method |
| JP2013052443A (en) * | 2012-11-15 | 2013-03-21 | Osaka Univ | Gma welding method |
-
1984
- 1984-11-07 JP JP23324984A patent/JPS61111780A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010046677A (en) * | 2008-08-19 | 2010-03-04 | Osaka Univ | Gma welding method |
| JP2013052443A (en) * | 2012-11-15 | 2013-03-21 | Osaka Univ | Gma welding method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3420658B2 (en) | TIG welding method and its welding torch | |
| US6835913B2 (en) | Hardsurfacing welding wire and process | |
| US3221136A (en) | Method and electrode for electric arc welding | |
| JPH039897Y2 (en) | ||
| EP1459830B2 (en) | Tig welding method | |
| EP1752249B1 (en) | Welding method using a shielding gas comprising bewtween 0.2 % and 10 % of an oxidative gas, the rest being helium | |
| US7915560B2 (en) | TIG welding equipment and TIG welding methods | |
| JP2012081480A (en) | Welding gas and plasma welding method | |
| JPS61111780A (en) | Welding method | |
| US3328557A (en) | Nickel arc welding electrode | |
| EP2636477B1 (en) | Tandem gas-shielded arc welding method | |
| JP3936342B2 (en) | TIG welding method | |
| JPH0518679B2 (en) | ||
| JP2000326092A (en) | Stainless steel filler metal for TIG welding | |
| KR101051667B1 (en) | Tungsten-Inert-Gas Welding Apparatus and Tungsten-Inert-Gas Welding Method | |
| JPH0122080B2 (en) | ||
| JPS61108475A (en) | Inert gas shield welding method | |
| JPH03234368A (en) | Root running method for narrow groove welding | |
| JPS5938073B2 (en) | Non-consumable electrode type welding torch | |
| JPS55153679A (en) | Gas shielded arc welding method | |
| JP3962633B2 (en) | Shielding gas for non-consumable electrodes | |
| JPH0362518B2 (en) | ||
| JPS5443843A (en) | Gas shielding method at mig arc welding of high nickel alloy wire | |
| JPH06277847A (en) | Tig welding method for stainless steel system | |
| JPS61144274A (en) | Narrow gap mig arc welding method |