STUDIES ON THE EFFECT OF WELDING CURRENT IN LASER-PLASMA ARC HYBRID WELDING OF AN AL-LI ALLOY

摘要：

The effect of welding current on welding quality was studied in laser-plasma arc hybrid welding of 1420 Al-Li alloy using both experimental and numerical modeling methods. Results show that the weld pools are all hybrid welding type under welding current of 40-80A, both length and width of the weld pool increase approximately linearly with the increasing of welding currents. Increasing welding current can significantly reduce the porosity in the welds. Increasing the welding current will increase the stay time of liquid weld pool and hence allow the pores grow and move out of weld pools more easily. The porosity in weld is therefore decreased significantly. This paper is beneficial for the process optimization and quality improvement of the hybrid welding of Al-Li alloy.

关键词： Laser – arc hybrid welding Al-Li alloy porosity temperature field finite element method

作者: Baohua Chang Jing Zhou Zhining Li Dong Du

作者单位: Department of Mechanical Engineering, Key Laboratory for Advanced Materials Processing Technology, Tsinghua University, Beijing, 100084, P. R. China

会议类型: 国际会议

会议名称: 第三届太平洋国际激光与光学应用会议(PICALO 2008)

会议地点: 北京

会议语种:英文

页码: 307-311

在线出版日期: 2008-04-16（万方平台首次上网日期，不代表论文的发表时间）