Study of laser pre-melting activating welding on low carbon steel

	Study of laser pre-melting activating welding on low carbon steel
	Yin, Yan 2; Wang, Zhanchong 2; Zhang, Ruihua 1; Zhu, Min 3; Luo, Xiaojun 3
刊名	Hanjie Xuebao/Transactions of the China Welding Institution
	2014-12-25
卷号	35 期号:12 页码:39-42
关键词	Chemical activation Gas welding Inert gas welding Laser beam welding Melting Welds Hybrid welding Laser-arc hybrid welding Negative values Oxygen atmosphere Surface tension gradient Temperature coefficient TIG-welding Welding parameters
ISSN号	0253360X
英文摘要	The laser pre-melting activating welding of low carbon steel with 8 mm thickness was study. Firstly, the surface of the substrate was pre-melted by the low power laser in oxygen atmosphere to form an oxide layer on the surface. Then TIG welding or laser arc hybrid welding was used to cover the weld. The effect of welding parameters on the weld depth and width was studied. The result shows that the arc was not shrunken during the welding after laser pre-melting. However the penetration increased about 0.5 times. The weld surface had a good appearance. The penetration increased with the increase of arc current, which had more increase after laser surface pre-melting. The increase of welding speed resulted in a decrease of penetration. The penetration increased with the increase of the pre-melting laser power. Simultaneously, the increase of laser power of hybrid welding also can increase the penetration. The oxygen content of the weld increased when the surface of weld was pre-melted by laser, which leads to the temperature coefficient of surface tension gradient changed from a negative value to a positive value. That is the reason why the penetration can be increased after laser pre-melting. ©, 2014, Harbin Research Institute of Welding. All right reserved.
语种	中文
出版者	Harbin Research Institute of Welding
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113631]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.China Iron & Steel Research Institute Group, Beijing; 100081, China; 2.State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials, Lanzhou University of Technology, Lanzhou; 730050, China; 3.The Second Construction Company of CNPC, Lanzhou; 730060, China
推荐引用方式 GB/T 7714	Yin, Yan,Wang, Zhanchong,Zhang, Ruihua,et al. Study of laser pre-melting activating welding on low carbon steel[J]. Hanjie Xuebao/Transactions of the China Welding Institution,2014,35(12):39-42.
APA	Yin, Yan,Wang, Zhanchong,Zhang, Ruihua,Zhu, Min,&Luo, Xiaojun.(2014).Study of laser pre-melting activating welding on low carbon steel.Hanjie Xuebao/Transactions of the China Welding Institution,35(12),39-42.
MLA	Yin, Yan,et al."Study of laser pre-melting activating welding on low carbon steel".Hanjie Xuebao/Transactions of the China Welding Institution 35.12(2014):39-42.