不锈钢电弧辅助活性TIG焊熔池表面张力变化机理

doi:10.11896/cldb.21050080

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Abstract For stainless steel arc assisted activating tungsten inert gas welding, this paper used a drop method to test the surface tension of molten pool. In order to keep the high temperature state of molten pool, this paper adopted a quenching device to cooling molten pool rapid, and then cut off quenching surface layer metal and then remelt it. The mechanism of active element to affect the surface tension and temperature coefficient of molten pool was analyzed. The results show that the surface tension temperature coefficient of the molten pool is negative when no O₂ is introduced into the auxiliary arc, while with the amount of O₂ introduced into the auxiliary arc 1.0 L/min or 1.5 L/min, the surface tension temperature coefficient of the molten pool is positive, and when the amount of O₂ introduced reaches 2.0 L/min, the surface tension temperature coefficient of the molten pool becomes negative again. After measuring and analyzing the distribution of oxygen element in the quench bath, it can be concluded that the concentration of oxygen element on the surface of the weld pool leads to the decrease of the surface tension and the change of the surface tension temperature coefficient of motten pool.

Key words： stainless steel AA-TIG welding surface tension surface tension temperature coefficient

Published: 10 September 2022 Online: 2022-09-10

CLC number:

TG444

Fund:National Natural Science Foundation of China (51074084).

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	Articles by authors
	LIU Zigang
	FAN Ding
	HUANG Yong
	LIU Yunhua
	ZHOU Xiaojing
	ZHU Tingting

Cite this article:

LIU Zigang,FAN Ding,HUANG Yong, et al. Mechanism of Changes in the Surface Tension of Stainless Steel Arc-Assisted Activating TIG Welding Molten Pool[J]. Materials Reports, 2022, 36(17): 21050080-6.

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http://www.mater-rep.com/EN/10.11896/cldb.21050080 OR http://www.mater-rep.com/EN/Y2022/V36/I17/21050080

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