JPH02258175A - Welding method for high nitrogen austenitic stainless steels - Google Patents
Welding method for high nitrogen austenitic stainless steelsInfo
- Publication number
- JPH02258175A JPH02258175A JP8253389A JP8253389A JPH02258175A JP H02258175 A JPH02258175 A JP H02258175A JP 8253389 A JP8253389 A JP 8253389A JP 8253389 A JP8253389 A JP 8253389A JP H02258175 A JPH02258175 A JP H02258175A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- austenitic stainless
- high nitrogen
- nitrogen austenitic
- stainless steel
- 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 43
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 12
- 229910001220 stainless steel Inorganic materials 0.000 title abstract description 6
- 239000007789 gas Substances 0.000 claims abstract description 16
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 15
- 239000001301 oxygen Substances 0.000 claims description 15
- 229910052760 oxygen Inorganic materials 0.000 claims description 15
- 229910052786 argon Inorganic materials 0.000 claims description 12
- 239000010953 base metal Substances 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
- B23K35/383—Selection of media, e.g. special atmospheres for surrounding the working area mainly containing noble gases or nitrogen
Landscapes
- Engineering & Computer Science (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！Ｉグ１
本発明はオーステナイト系ステンレス鋼の共金を使用し
たミグ溶接による溶接方法に関する。DETAILED DESCRIPTION OF THE INVENTION "Industrial Application! Ig1 The present invention relates to a welding method by MIG welding using austenitic stainless steel alloy.
［従来の技術］
オーステナイト系ステンレス鋼において、窒素を０．１
〜０．３％増加すると、低温から高温に至る強度を向上
させ、また耐食性が改良される等、多くの利点が得られ
るため、近年その用途が拡大されつつある。この高窒素
オーステナイト系ステンレス鋼の溶接は高窒素含有量に
なるほどブローホール発生の可能性か高いので、溶接方
法としては被覆アーク溶接法、デイグ溶接法、゛リーブ
マージアーク溶接法が用いられてきた。[Prior art] In austenitic stainless steel, nitrogen is added to 0.1
An increase of ~0.3% provides many advantages, such as improved strength from low to high temperatures and improved corrosion resistance, so its use has been expanding in recent years. When welding high-nitrogen austenitic stainless steel, the higher the nitrogen content, the higher the possibility of blowholes occurring, so shielded arc welding, daig welding, and leave-merged arc welding have been used as welding methods. .
［発明か解決しようとする課題］
しかしながら、被覆アーク溶接法は溶接の自動化または
半自動化か難しく、ティク溶接法は３γ容電流量が低く
溶接能率が悪く、サブマージアーク溶接法は下向きおよ
び横向き溶接に限られ全姿勢溶接が適用できずまた半自
動溶接には不向きである。そのため、高窒素オーステナ
イ■・系ステンレス鋼の溶接においては溶接能率に優れ
自動化または半自動化の容易なミグ溶接法が望まれてい
た。[Problem to be solved by the invention] However, it is difficult to automate or semi-automate welding with the covered arc welding method, with the tick welding method, the 3γ capacity current is low and welding efficiency is poor, and with the submerged arc welding method, it is difficult to weld in downward and lateral directions. This method cannot be used for all-position welding, and is not suitable for semi-automatic welding. Therefore, when welding high nitrogen austenite stainless steel, there has been a demand for MIG welding, which has excellent welding efficiency and is easy to automate or semi-automate.
然るに、鋼のミグ溶接ではアークの安定上シールドガス
のアルゴンに数％の酸素の混合が必要となり、そのため
経済的な理由から酸素を数％含有するアルゴンがシール
ドガスとして使用されていた。However, in MIG welding of steel, it is necessary to mix several percent oxygen with the argon shielding gas to stabilize the arc, and therefore, for economic reasons, argon containing several percent oxygen has been used as the shielding gas.
この酸素を数％含有するアルゴンガスをシールドガスと
して共金を使用する高窒素オーステナイト系ステンレス
鋼のミグ溶接を行うと、溶接中に鋼中の窒素とシールド
ガス中の酸素が結合し、ＮＯｘの生成によりブローポー
ルか発生し所望の溶接強度が得られず、そのため高窒素
オーステナイト系ステンレス鋼のミグ溶接は殆と実施さ
れていなかった。When MIG welding of high-nitrogen austenitic stainless steel is performed using argon gas containing several percent oxygen as a shielding gas, the nitrogen in the steel and the oxygen in the shielding gas combine during welding, resulting in NOx Due to the generation of blow poles, the desired welding strength could not be obtained, and for this reason, MIG welding of high nitrogen austenitic stainless steel was rarely carried out.
本発明は、高窒素オーステナイト系ステンレス鋼の共金
糸のミグ溶接における前記のごとき問題点を解決すべく
なされたものであって、ブローホールの発生が少なく所
望の溶接強度の得られる高窒素オーステナイト系ステン
レス鋼の共金系ミグ溶接の溶接方法を提イノ（すること
を目的とする。The present invention has been made to solve the above-mentioned problems in MIG welding of high-nitrogen austenitic stainless steel threads. The purpose is to innovate a welding method for stainless steel co-metallic MIG welding.
し課題を解決するための手段］
発明者はブローポール発生の原因どなるシールドガス中
の酸素について着目し、アークの安定を阻害しない範囲
で酸素量を調節することを着想し本発明を完成した。Means for Solving the Problem] The inventor focused on oxygen in the shielding gas, which is the cause of blow pole generation, and conceived the idea of adjusting the amount of oxygen within a range that does not impede the stability of the arc, and completed the present invention.
本発明の高窒素オーステナイト系ステンレス鋼の溶接方
法は、２％以下の酸素を含有するアルゴンガスをシール
ドカスとし、共金を消耗電極としてミグ溶接することを
要旨とする。The gist of the welding method for high nitrogen austenitic stainless steel of the present invention is to carry out MIG welding using argon gas containing 2% or less oxygen as a shielding gas and using a cometal as a consumable electrode.
本発明か適用される高窒素オーステナイｌ−系ステンレ
ス鋼は、窒素を０１〜０３％含有するオースイナイト系
スデンレス鋼で、たとえば５Ｕ８３０４Ｎｌあるいは３
Ｕ Ｓ ３０４ Ｎ ２等である。シールドガスはア
ルゴンを一旦精製し、所望の酸素を混合したものを用い
る。消耗電極となる電極ワイヤは母材と同等量」二の窒
素を含む高窒素オーステナイト系ステンレス鋼の共金を
用いる。The high nitrogen austenite stainless steel to which the present invention is applied is an ausinite stainless steel containing 01 to 03% nitrogen, such as 5U8304Nl or 3
US 304 N 2 etc. As the shielding gas, argon is purified once and mixed with desired oxygen. The electrode wire, which serves as the consumable electrode, is made of high-nitrogen austenitic stainless steel alloy containing the same amount of nitrogen as the base material.
［作用］
シールドカスであるアルゴン中の酸素量を２％以下とし
たので、溶接中に発生ずるＮと結合するＯ量が減少し、
Ｎｏにの生成が抑制され溶接部のブローホール発生が減
少する。そのため、所望の溶接強度を得ることができる
。アルゴン中の酸素量を２％以下としたのは、２％を超
えると溶接部のブローポールを寸分に減少させることか
できないからである。[Effect] Since the amount of oxygen in the argon shielding scum is 2% or less, the amount of O that combines with N generated during welding is reduced,
This suppresses the generation of No and reduces the occurrence of blowholes in welds. Therefore, desired welding strength can be obtained. The reason why the amount of oxygen in argon is set to 2% or less is because if it exceeds 2%, it is impossible to reduce the blow pole of the welded part by a fraction.
［実施例］
本発明の実施例を従来例と共に説明し、本発明の効果を
明らかにする。[Example] Examples of the present invention will be explained together with conventional examples to clarify the effects of the present invention.
Ａ Ｕ ３３０４ Ｎ ２ （窒素量０２０％〉を素材
として、電極ワイヤとして５ＵＳ３０４Ｎ２用い、シー
ルドガスのアルゴン中の酸素量を２％から・１％に変化
させて、ミグ溶接を行った。MIG welding was performed using A U 3304 N 2 (nitrogen content: 020%) as the material, using 5US304N2 as the electrode wire, and changing the oxygen content in the shielding gas argon from 2% to 1%.
得られた溶接部について単位長さ当たりの欠陥点数、０
，２％耐力、引張強さについて測定し、第１表に結果を
併せて示した。The number of defects per unit length of the obtained weld is 0.
, 2% proof stress, and tensile strength were measured, and the results are also shown in Table 1.
第１表に示したように、アルゴン中の酸素量が２５２に
以上である場合は、欠陥点数が４以上てブローホールが
多く発生し溶接部の強度が不十分である。As shown in Table 1, when the oxygen content in argon is 252 or more, the number of defects is 4 or more, many blowholes occur, and the strength of the welded part is insufficient.
これに対して、本発明例であるアルゴン中の酸素が２％
である場合は、欠陥点数が２でブローホールが少なく、
しかも溶接部の０．２％耐力が４２ 、６ ｋｇｆ／
＋ｎｍ２、引張強さが７２ 、 Ｏｋｇｆ／ ｍｍ２て
あって、所望の溶接強度の得られることが確認された。On the other hand, in the present invention example, oxygen in argon was 2%.
If , the number of defects is 2 and there are few blowholes,
Moreover, the 0.2% yield strength of the welded part is 42,6 kgf/
+nm2, and the tensile strength was 72 Okgf/mm2, confirming that the desired welding strength could be obtained.
［発明の効果］
本発明の高窒素オーステナイト系ステンレス鋼の溶接方
法は、以上説明したように、２％以下の酸素を含有する
アルゴンガスをシールドカスとし、共金を消耗電極とし
てミグ溶接することを特徴とするものてあって、従来、
溶接部のフローホールが多く１−分な溶接強度か得られ
ず殆ど実用されなかった高窒素オーステナイト系ステン
レス鋼の共金系ミグ溶接を可能とするものであって、溶
接能率に優れ所望の溶接強度が得られるというｆ（れた
効果がある。[Effects of the Invention] As explained above, the method for welding high nitrogen austenitic stainless steel of the present invention involves performing MIG welding using argon gas containing 2% or less oxygen as a shield scum and a matching metal as a consumable electrode. Conventionally, there are
This enables alloy-based MIG welding of high-nitrogen austenitic stainless steel, which has rarely been put into practical use due to the large number of flow holes in the weld zone and the welding strength of 1-min. It has the effect of increasing strength.
Claims (1)
ドガスとし、共金を消耗電極としてミグ溶接することを
特徴とする高窒素オーステナイト系ステンレス鋼の溶接
方法。(1) A method for welding high-nitrogen austenitic stainless steel, characterized by performing MIG welding using argon gas containing 2% or less oxygen as a shielding gas and a matching metal as a consumable electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8253389A JPH02258175A (en) | 1989-03-31 | 1989-03-31 | Welding method for high nitrogen austenitic stainless steels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8253389A JPH02258175A (en) | 1989-03-31 | 1989-03-31 | Welding method for high nitrogen austenitic stainless steels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02258175A true JPH02258175A (en) | 1990-10-18 |
Family
ID=13777143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8253389A Pending JPH02258175A (en) | 1989-03-31 | 1989-03-31 | Welding method for high nitrogen austenitic stainless steels |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02258175A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102764930A (en) * | 2012-07-19 | 2012-11-07 | 中国科学院金属研究所 | TIG (tungsten inert gas) welding method for high-nitrogen steel under double-layer gas flow shielding |
-
1989
- 1989-03-31 JP JP8253389A patent/JPH02258175A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102764930A (en) * | 2012-07-19 | 2012-11-07 | 中国科学院金属研究所 | TIG (tungsten inert gas) welding method for high-nitrogen steel under double-layer gas flow shielding |
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