宋刚

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:材料科学与工程学院

学科:材料连接技术

办公地点:材料学院铸造工程中心406

联系方式:0411-84707817

电子邮箱:songgang@dlut.edu.cn

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Microstructures of laser-tungsten inert gas hybrid welding of dissimilar AZ31 Mg alloy and Q235 steel with Ni as interlayer

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论文类型:期刊论文

发表时间:2011-04-01

发表刊物:MATERIALS RESEARCH INNOVATIONS

收录刊物:Scopus、SCIE、EI

卷号:15

期号:2

页面范围:145-149

ISSN号:1432-8917

关键字:Hybrid welding; Shear strength; Mg; Mg(17)Al(12); Mg(2)Ni

摘要:Microstructures of a laser-tungsten inert gas (TIG) hybrid welding joint of dissimilar Mg alloy and steel with and without Ni interlayer are studied comparatively by SEM. The results show that there are a lot of precipitates of Mg(17)Al(12) with mesh structures in the molten pool of Mg to steel dissimilar joints of laser-TIG hybrid welding without Ni interlayer, leading to the reduction in the mechanical properties of the welded joints. However, the addition of the Ni interlayer improves the microstructures of Mg to steel joints by laser-TIG hybrid welding. The precipitates in the molten pool are mainly composed of Mg(2)Ni and Mg(17)Al(12) in the form of dispersive particles with the size of <5 mu m. The shear strength of Mg to steel joints by laser-TIG hybrid welding with Ni interlayer is higher than that without Ni interlayer.