电焊机2011，Vol.41Issue(11)：68-72,5.
轨道交通用6082铝合金焊接接头组织与性能
Microstructure and mechanical properties of welded joint of 6082 aluminum alloy for rail transportation
罗传孝 1王少刚 1翟伟国1
作者信息
- 1. 南京航空航天大学材料科学与技术学院,江苏 南京 210016
- 折叠
摘要
Abstract
6082 aluminum alloy for rail transportation is welded by metal inert gas arc welding with ER5356 welding wire,and the microstructure and mechanical properties of welded joints are analyzed and tested respectively.Metallograph observation of welded joint illustrates that the microstructure of weld metal is fine equiaxed grain,which mainly consists of a -Al matrix phase and Mg2Si strengthening phase,while the heat-affected zone(HAZ) is composed of relatively coarse dendrite.Mechanical properties test shows that the tensile strength of welded joint is about 74% of that of the base metal.SEM observation indicates that the fracture surface morphology of joint presents the obvious characteristic of ductile fracture,and on fracture surface the dimples are fine and distribute uniformly.关键词
6082铝合金/MIG焊/微观组织/力学性能Key words
6082 aluminum alloy/metal inert gas arc welding/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
罗传孝,王少刚,翟伟国..轨道交通用6082铝合金焊接接头组织与性能[J].电焊机,2011,41(11):68-72,5.
