Advances in Laser Welding Technology for Dissimilar Metal Joining of Dual-phase Steel and Aluminium Alloy
LI Ang1, ZENG Yida1,*, LI Zhiyong2, HE Rong3, GUO Zhenghua1, CHEN Yuhua1, JIANG Yi1, YANG Zirui4
1 School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China 2 Jiangxi Changhe Aviation Industry Co., Ltd., Jingdezhen 333002, Jiangxi, China 3 Jiangling Motors Co., Ltd., Nanchang 330200, China 4 School of Metallurgy and Materials, University of Birmingham, Birmingham B15 2SE, United Kingdom
Abstract: With the increasing demand for weight reduction and energy saving in the automotive industry, lightweight materials such as aluminium alloys have been widely used in body structures in recent years. In dissimilar metal laser welding of dual-phase steel and aluminium alloy, poor weld formation and low joint strength due to large differences in material physical and chemical properties are mainly attributed to the high brittleness and hardness of Fe-Al intermetallic compounds(IMC) generated at the steel/aluminium interface, which large residual stresses in welded joints deteriorate the performance of welded joints. In this paper, the influence laws of process window and metallurgical regulation on weld formation are reviewed, and the control measures of welding defects such as spatters, loss, cracks, etc. are illustrated. The influence laws of welding parameters and different intermetallic elements on the types and quantities of interfacial intermetallic phases as well as the mechanical properties of joints are summarised, and the roles and characteristics of different intermetallic elements(Pb, Sn, Ti, Cu, Mn, Si, etc.) in the welding process are analysed, and the role and characteristics of different intermetallic elements in the weld process are presented. It also looks forward to the future development trend of laser welding of dissimilar metals of dual-phase steel/aluminium alloy.
通讯作者:
*曾一达,南昌航空大学航空制造工程学院副教授、硕士研究生导师。2010年海南大学材料科学与工程专业本科毕业,2014年江苏大学材料学专业硕士毕业,2018年天津大学材料加工工程专业博士毕业,美国南卡罗来纳大学(University of South Carolina)联合培养博士。目前主要从事高性能有色金属新材料、金属功能材料、高能束焊接理论与技术、金属3D打印等方面的研究。发表学术论文10余篇,包括Journal of Nanoparticle Research、Applied Surface Science等。zyd_welding@163.com
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