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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Laser-arc hybrid welding of titanium alloy and stainless steel with copper interlayer

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论文类型:期刊论文

发表时间:2016-05-10

发表刊物:Zhongguo Jiguang/Chinese Journal of Lasers

收录刊物:EI、PKU、ISTIC、Scopus

卷号:43

期号:5

ISSN号:02587025

摘要:The TC4 titanium alloy and 304 stainless steel are welded by laser-arc hybrid heat source with copper interlayer. Macrostructure and microstructure of cross sections, main compositions, mechanical properties and fracture positions of welding joints are examined. The results show that the transition zone is characterized by Ti-Cu intermetallic, solid solution of copper, and Fe-Cu eutectic mixture. With the increase of laser power, the thickness of Ti-Cu intermetallic near the Ti-Cu interface increases, which has harmful effect on mechanical properties. Fracture of joint mainly happens at the interface between titanium alloy and copper when laser power is higher. The mutual diffusion depth and density of elements, such as copper and iron near the interface between copper and stainless steel, also increase, which is beneficial to enhancing mechanical properties. Fracture of joint mainly happens at the interface between the copper and stainless steel when laser power is lower. The key point to achieve favorite welding joint is the control of Ti-Cu intermetallic and Fe-Cu eutectic mixture. ??? 2016, Chinese Lasers Press. All right reserved.