电焊机2017，Vol.47Issue(6)：105-109,5.DOI:10.7512/j.issn.1001-2303.2017.06.23
SUS321不锈钢和6061铝合金激光搭接焊接头的组织和力学性能
Microstructure and mechanical properties of welded joints of laser lap welding for SUS321 stainless steel and 6061 aluminum alloy
摘要
Abstract
Welding parameters have an important influence on the quality of dissimilar joints.In this paper,the effects ot laser power and welding speed on the weld formation of SUS321 stainless steel and 6061 aluminum alloy were studied.The morphology and composition of the dissimilar joints were analyzed,and the fracture morphology and mechanical properties were studied.Through welding test,it is found that different welding speed and laser power have important influence on weld formation.When the laser power is from 2 200～2 400 W and the welding speed is about 30～35 mm/s,the weld with higher quality can be obtained.In the welding process,intermetallic compounds such as FeAl,Fe2Al3 and Fe3Al are formed at the interface of the joints,and their existence influences the mechanical properties of the joints.Ductile fracture occurs in the tensile test,and the crack initiates in intermetallic compound and expands along the steel aluminum reaction interface until the joint is broken.关键词
SUS321不锈钢/6061铝合金/激光焊接/组织结构/力学性能Key words
SUS321 stainless steel/6061 aluminum alloy/laser welding/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
高生祥,邓丽霞..SUS321不锈钢和6061铝合金激光搭接焊接头的组织和力学性能[J].电焊机,2017,47(6):105-109,5.基金项目
2016年浙江省教育厅科研项目《高碳铬轴承钢热处理工艺及其力学性能研究》(Y201636055) （Y201636055）
