Progress of anti-oxidation protection technology in titanium alloy welding process

Fan Limin; Geng Naitao; Yang Liu; Wu Shaojie; Cheng Fangjie

doi:10.7513/j.issn.1004-7638.2021.06.005

Volume 42 Issue 6

Dec. 2021

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Fan Limin, Geng Naitao, Yang Liu, Wu Shaojie, Cheng Fangjie. Progress of anti-oxidation protection technology in titanium alloy welding process[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 43-50. doi: 10.7513/j.issn.1004-7638.2021.06.005

Citation:

Fan Limin, Geng Naitao, Yang Liu, Wu Shaojie, Cheng Fangjie. Progress of anti-oxidation protection technology in titanium alloy welding process[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 43-50. doi: 10.7513/j.issn.1004-7638.2021.06.005

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Progress of anti-oxidation protection technology in titanium alloy welding process

doi: 10.7513/j.issn.1004-7638.2021.06.005

1.
School of Material Science and Engineering, Tianjin University, Tianjin 300350, China
2.
Ansteel Beijing Research Institute Co., Ltd., Beijing 102200, China
3.
Chengdu Advanced Metal Materials Industrial Technology Research Institute Co., Ltd., Chengdu 610300, Sichuan, China
4.
Tianjin Key Laboratory of Advanced Joining Technology, Tianjin 300350, China

Received Date: 2021-04-13
Publish Date: 2021-12-31

Abstract

Abstract

Titanium and titanium alloys have excellent comprehensive properties, but the welding oxidation problem is serious due to the strong high-temperature activity. Especially the problem of absorbing gas at solid-state temperature is significant, which affects the quality of the welding joint. Therefore, strict welding protection measures are needed. Based on the analyses of oxidation mechanism and characteristics of titanium alloy, various anti-oxidation protection measures and specific technologies in welding process are summarized systematically in this paper. Anti-oxidation protection of titanium alloy in four typical processes of long straight weld, circular weld, space irregular weld and additive manufacturing is introduced in detail. The main protective measures include welding gas shielding trailing, closed argon-filled environment and forced cooling. For local gas protection of long straight weld of titanium alloy, the general form is welding gas shielding trailing combined with back protective gas groove and water cooling measures. For the back protection of the circular weld, the back gas shielding or the whole argon filled protection method can be adopted, and the front protection can use the welding gas shielding trailing. However, due to the limitation of the shape of the irregular weld, the method of welding gas shielding trailing is no longer applicable. The simple argon-filled protective box can be used for small size components, while the protection problem of large size components needs to be solved urgently. The heat accumulation in the additive manufacturing process also increases requirements for its protection form. At present, good results have been achieved by the laminar inert gas and followed by forced CO₂ cooling process.
- titanium alloy,
- welding,
- oxidation,
- local shielding

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References(30)

References

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