Study on Fiber Laser Welding for DP780 High Strength Steel

摘要：

Welding experiments of DP780 high strength steel plate produced by Baosteel with IPG YLR-6000-ST2 fiber laser have been processed. The influence of welding parameters on welding quality has been investigated. As well as microstructure and mechanical character of welding seam have been analyzed. The results show that the joint appearance of DP780 high strength steel welded with IPG YLR6000-ST2 fiber laser has good performance and the mechanics property is good without fit-up gap. The microstructure of weld bead is columnar crystals, mainly lath-shaped ferrite, needle-like lower bainite and a small amount of martensite. Heat-affected zone is narrow and the grain grows with little size. The measured micro-hardness values of the sample decrease smoothly from weld center to base metal and there does not have softened zone.

关键词： Fiber laser Laser welding High strengthen steel

作者: Tao Huang Lijun Xin Zhiyong Wang

作者单位: Baoshan Iron & Steel CO, LTD, Baosteel Branch, China Institute of Laser Engineering, Beijing Univers Institute of Laser Engineering, Beijing University of Technology, China

会议类型: 国际会议

会议名称: 2011 International Conference on Mechatronics and Materials Processing(2011年机电一体化与材料加工国际会议 ICMMP)

会议地点: 广州

会议语种:英文

页码: 48-53

在线出版日期: 2011-11-18（万方平台首次上网日期，不代表论文的发表时间）