JPS60130475A - Mig welding method - Google Patents
Mig welding methodInfo
- Publication number
- JPS60130475A JPS60130475A JP23607383A JP23607383A JPS60130475A JP S60130475 A JPS60130475 A JP S60130475A JP 23607383 A JP23607383 A JP 23607383A JP 23607383 A JP23607383 A JP 23607383A JP S60130475 A JPS60130475 A JP S60130475A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- wire
- hydrogen
- welding wire
- weld zone
- 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
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
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、M工G溶接法の改良に関する。[Detailed description of the invention] The present invention relates to improvements in the M-G welding method.
従来のM工G溶接の概念図を、第1図に示す。A conceptual diagram of conventional M-G welding is shown in Fig. 1.
コイル状に巻かれた溶接ワイヤ1は、送給ローラ7によ
り溶接トーチ3に自動的に送給され、直流溶接電源4に
より通電することによって、母材5と溶接ワイヤ1との
間にアークを発生させ、母材5と溶接ワイヤ1自身を溶
融して接合を行う。この際、溶融金属6を大気からシー
ルドするために、ノズル7からAr等シールドガス8を
流す。しかしながら、従来のM工G溶接法では、高強度
鋼の溶接に際しては、大気中の水分の溶接ワイヤへの付
着や、ワイヤ製造時に吸収した水素による低温割れが発
生する。これを防止するには、溶接部分の中間焼鈍や十
分に直後熱を行い、溶接金属中の拡散性水素を母材およ
び大気中へ拡散および放出し、溶接金属中に蓄積しない
ようにする必要がある。しかし、このような脱水素熱処
理は、工期、コストの面で大きな問題となっている。The welding wire 1 wound into a coil is automatically fed to the welding torch 3 by a feeding roller 7, and is energized by a DC welding power source 4 to create an arc between the base metal 5 and the welding wire 1. The base material 5 and the welding wire 1 themselves are melted and joined. At this time, a shielding gas 8 such as Ar is flowed from the nozzle 7 in order to shield the molten metal 6 from the atmosphere. However, in the conventional M/G welding method, when welding high-strength steel, cold cracking occurs due to atmospheric moisture adhering to the welding wire and hydrogen absorbed during wire manufacturing. To prevent this, it is necessary to perform intermediate annealing or sufficient immediate heating of the welded part to diffuse and release the diffusible hydrogen in the weld metal into the base metal and the atmosphere, and prevent it from accumulating in the weld metal. be. However, such dehydrogenation heat treatment poses major problems in terms of construction period and cost.
近年、構造物の大型化に伴い、その重量低減のため、高
強度鋼の使用頻度が高まりつつある。In recent years, as structures have become larger, high-strength steel has been increasingly used to reduce their weight.
しかし、厚板の高強度鋼溶接継手では、水素による低温
割れが問題となる。そこで、本発明は、この水素による
低温割れを効率良(防止するものである。However, cold cracking caused by hydrogen is a problem in welded joints made of thick high-strength steel. Therefore, the present invention efficiently (prevents) cold cracking caused by hydrogen.
本発明は、M工G溶接機のワイヤ送給部において、溶接
ワイヤを外部熱源あるいは溶接ワイヤ自身の抵抗発熱に
より加熱し、該溶接ワイヤの表面に吸着した水分並びに
水素分子を蒸発・除脱せしめ、除脱した水分並びに水素
分子は、溶接ワイヤに沿って流れるキャリアガスにより
外部へ除去することにより、溶接金属中へ入る水素量を
低減したことを特徴とするM工G溶接法に関する。The present invention heats the welding wire in the wire feeding section of the M/G welding machine by an external heat source or by the resistance heat generation of the welding wire itself, and evaporates and removes moisture and hydrogen molecules adsorbed on the surface of the welding wire. , relates to an M-G welding method characterized in that the amount of hydrogen entering the weld metal is reduced by removing removed moisture and hydrogen molecules to the outside by a carrier gas flowing along a welding wire.
本発明方法によれば、溶接金属へ入る水素量の低減のみ
ならず、予熱効果により溶接速度を向上させることがで
きる。そして5本発明は、化学機械、原動機、海洋構造
物等の高強度・厚板溶接構造物全般に適用可能である。According to the method of the present invention, it is possible not only to reduce the amount of hydrogen entering the weld metal, but also to improve the welding speed due to the preheating effect. 5. The present invention is applicable to all high-strength, thick-plate welded structures such as chemical machines, prime movers, and offshore structures.
第2図及び第3図に、本発明に用いるM工G溶接機の概
念図を示す。FIG. 2 and FIG. 3 show conceptual diagrams of the M/G welding machine used in the present invention.
先ず、第2図に8いて、第1図に示す従来のものと異る
点は、1ワイヤ送給部と溶接トーチ3の間に高周波コイ
ル、ニクロム線等の熱源9を設けたこと、8よび2溶接
ワイヤに沿ってAr等のキャリヤガス11を流すノズル
10を有することである。尚、12は電極チップを示す
。First, 8 in FIG. 2 is different from the conventional one shown in FIG. and a nozzle 10 for flowing a carrier gas 11 such as Ar along the two welding wires. Note that 12 indicates an electrode tip.
また、第3図に3いて、第1図に示す従来のものと異る
点は、電極チップ12の先端に、セラミック製のチップ
13を取り付け、溶接ワイヤ1に沿ってキャリヤガス(
Ar等)11を流すことである。3, which is different from the conventional one shown in FIG. 1, is that a ceramic tip 13 is attached to the tip of the electrode tip 12, and a carrier gas (
(Ar, etc.) 11.
第2図の場合は、高周波コイルやニクロム線等の熱源で
、また、第3図の場合は、溶接ワイヤ自身の抵抗発熱で
、溶接ワイヤを加熱し、溶接ワイヤ表面に吸着した水分
並びに水素分子を蒸発・除脱させる。このように除脱し
た水分並びに水素分子はキャリヤガス11により外部へ
除去される。また、ワイヤの予熱効果により、溶接速度
が上がり、溶接能率が向上する。In the case of Figure 2, the welding wire is heated by a heat source such as a high frequency coil or nichrome wire, and in the case of Figure 3, the welding wire is heated by the resistance heat generation of the welding wire itself, and the water and hydrogen molecules adsorbed on the surface of the welding wire are heated. evaporates and removes. The moisture and hydrogen molecules thus removed are removed to the outside by the carrier gas 11. In addition, the wire preheating effect increases welding speed and improves welding efficiency.
かくして、本発明方法によれば、溶接金属中へ入る水素
量は低源でき、中間焼鈍や直後熱時間の短縮もしくは省
略が可能となり、従って、工期短縮やコスト低減が可能
となる。Thus, according to the method of the present invention, the amount of hydrogen that enters the weld metal can be reduced, making it possible to shorten or omit intermediate annealing and immediate heating time, and thus shorten the construction period and reduce costs.
以下に、本発明の実施例を示す。Examples of the present invention are shown below.
実施例 第4図に示す断面形状を持つ板厚200閤。Example A plate with a thickness of 200 mm and a cross-sectional shape shown in Figure 4.
長さ400mのHT100鋼板を、狭開先MI+l)溶
接機を用いて、第1表に示す条件で溶接した。HT100 steel plates having a length of 400 m were welded using a narrow gap MI+l) welding machine under the conditions shown in Table 1.
48時間後、断面マクロ調査を行ったところ、従来法で
は低温割れが多く発生していたが、本発明の第2図に従
って溶接ワイヤを加熱したものは、割れが発生しなかっ
た。After 48 hours, a cross-sectional macroscopic investigation was conducted, and it was found that many low-temperature cracks occurred in the conventional method, but no cracks occurred in the welding wire heated according to the method shown in FIG. 2 of the present invention.
また、J工8Z 3113 K準じて第1表に示した条
件でビードオンプレートを作成し、溶接金属中の拡散性
水素量を測定した。その結果を第1表に示す。Further, a bead-on plate was prepared under the conditions shown in Table 1 according to J Engineering 8Z 3113 K, and the amount of diffusible hydrogen in the weld metal was measured. The results are shown in Table 1.
第1表より、本発明による方法を用いると、溶接金属中
の水素量を約Aに低減できることがわかる。Table 1 shows that the amount of hydrogen in the weld metal can be reduced to about A by using the method according to the invention.
第1表:拡散性水素量測定結果及び割れ発生の有無Table 1: Diffusible hydrogen amount measurement results and presence or absence of cracks
第1図は、従来のM工G溶接の概念図であり、第2図及
び第3図は、本発明に用いるM工G溶接機の概念図であ
る。第4図は、実施例で溶接したHT10G鋼板の断面
形状を示す。
復代理人 内 1) 明
復代理人 萩 原 亮 −
特開昭GO−130475(3)FIG. 1 is a conceptual diagram of conventional M-work G welding, and FIGS. 2 and 3 are conceptual diagrams of a M-work G welding machine used in the present invention. FIG. 4 shows the cross-sectional shape of the HT10G steel plate welded in the example. Sub-agents 1) Meifuku agent Ryo Hagiwara - Tokukai Sho GO-130475 (3)
Claims (1)
部熱源あるいは溶接ワイヤ自身の抵抗発熱により加熱し
、該溶接ワイヤの表面に吸着した水分並びに水素分子を
蒸発・除脱せしめ、除脱した水分差び釦水素分子は、溶
接ワイヤに沿って流れるキャリアガスにより外部へ除去
することにより、溶接金属中へ入る水素量を低減したこ
とを特徴とするMIG溶接法。In the wire feed section of the MIG welding machine, the welding wire is heated by an external heat source or the welding wire's own resistance heat generation, and the moisture and hydrogen molecules adsorbed on the surface of the welding wire are evaporated and removed, and the removed moisture difference is A MIG welding method characterized in that the amount of hydrogen entering the weld metal is reduced by removing hydrogen molecules to the outside by a carrier gas flowing along the welding wire.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23607383A JPS60130475A (en) | 1983-12-16 | 1983-12-16 | Mig welding method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23607383A JPS60130475A (en) | 1983-12-16 | 1983-12-16 | Mig welding method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60130475A true JPS60130475A (en) | 1985-07-11 |
Family
ID=16995311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23607383A Pending JPS60130475A (en) | 1983-12-16 | 1983-12-16 | Mig welding method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60130475A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010131637A (en) * | 2008-12-04 | 2010-06-17 | Kobe Steel Ltd | Gas shielded arc welding method |
CN101862886A (en) * | 2010-06-10 | 2010-10-20 | 哈尔滨工业大学 | Hot wire consumable electrode gas protection welding method and realization device thereof |
CN113000991A (en) * | 2019-12-20 | 2021-06-22 | 伊利诺斯工具制品有限公司 | Method and system for gas control during wire pretreatment |
CN113000990A (en) * | 2019-12-20 | 2021-06-22 | 伊利诺斯工具制品有限公司 | Method and system for gas control during wire pretreatment |
-
1983
- 1983-12-16 JP JP23607383A patent/JPS60130475A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010131637A (en) * | 2008-12-04 | 2010-06-17 | Kobe Steel Ltd | Gas shielded arc welding method |
CN101862886A (en) * | 2010-06-10 | 2010-10-20 | 哈尔滨工业大学 | Hot wire consumable electrode gas protection welding method and realization device thereof |
CN113000991A (en) * | 2019-12-20 | 2021-06-22 | 伊利诺斯工具制品有限公司 | Method and system for gas control during wire pretreatment |
CN113000990A (en) * | 2019-12-20 | 2021-06-22 | 伊利诺斯工具制品有限公司 | Method and system for gas control during wire pretreatment |
EP3838468A1 (en) * | 2019-12-20 | 2021-06-23 | Illinois Tool Works Inc. | Methods and systems for gas control during welding wire pretreatments |
EP3838466A1 (en) * | 2019-12-20 | 2021-06-23 | Illinois Tool Works Inc. | Methods and systems for gas control during welding wire pretreatments |
US11772182B2 (en) | 2019-12-20 | 2023-10-03 | Illinois Tool Works Inc. | Systems and methods for gas control during welding wire pretreatments |
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