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论文类型：期刊论文

发表时间：2022-06-29

发表刊物：中国激光

所属单位：材料科学与工程学院

卷号：43

期号：5

页面范围：503002

ISSN号：0258-7025

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.

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