镁合金管材包覆挤压界面特性研究  

Study on the interface characteristics of magnesium alloy pipe cladding extrution

作　　者：谭明 权高峰[3] 刘赵铭[2] Tan Ming;Quan Gaofeng;Liu Zhaoming(Yangzhou Chende Heavy Industries Co.,Ltd.,Yangzhou 225000,China;Dalian Jiaotong University,Dalian 116021,China;Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]扬州诚德重工有限公司,江苏扬州225000 [2]大连交通大学,辽宁大连116021 [3]西南交通大学,四川成都611756

出　　处：《机械制造文摘（焊接分册）》2019年第6期26-30,共5页Welding Digest of Machinery Manufacturing

摘　　要：采用5083铝合金和纯铜为包覆材料,AZ31镁合金为基体材料挤压出镁合金复合管材。当挤压比为23.0时,铝外包覆镁管界面与铜内包覆镁管界面均结合良好,镁铝界面结合强度大于镁铜界面结合强度。界面研究结果表明,铝包镁与铜包镁界面两侧元素均未发生明显远程扩散。镁铝双金属界面层主要是化学反应形成Al3Mg2,镁铜双金属界面层无化学反应产生,属于固相扩散,元素扩散层较薄。In this paper,5083 aluminum alloy and pure copper are used as cladding materials,AZ31 magnesium alloy is used as matrix material to extrude magnesium alloy composite pipe.When the extrusion ratio is 23.0,the interface between the aluminum clad magnesium tube and the copper clad magnesium tube is well bonded,and the bonding strength of the magnesium aluminum interface is greater than that of the magnesium copper interface.The results of interface study show that there is no significant remote diffusion of elements on both sides of the interface.The interface layer of magnesium and aluminum is mainly formed by chemical reaction of Al 3Mg 2,and there is no chemical reaction in the interface layer of magnesium and copper,which belongs to solid-phase diffusion,and element diffusion layer is thin.

关 键 词：镁合金管材 包覆挤压 界面特性 结合机理 

分 类 号：TG115.28[金属学及工艺—物理冶金]