摘要
将磁场引入激光焊接系统中,开展了DC51D+AZ镀锌钢和6061铝合金的激光对接焊试验和焊接试样的拉伸试验,研究了交变磁场对焊缝成形、气孔缺陷、断口形貌、金属间化合物与焊缝力学性能的影响。结果表明,添加磁场后,焊缝抗拉强度得到提高;磁场搅拌能改善焊缝的形貌,减少焊缝中气孔的数量,细化针状FeAl_3相,抑制脆性Fe/Al化合物的生长,从而有效提高焊缝的力学性能。
A magnetic field is introduced into the laser welding process, and the butt welding experiment of DCS1D＋AZ galvanized steels and 6061 aluminum alloys and the tensile experiment of welding samples are conducted. The influences of the alternating magnetic field on weld formation, porosity defects, fracture morphologies, intermetallic compounds, and mechanical properties of Fe/Al welding joints are investigated. The results show that the tensile strength of welding joints is improved after the introduction of the magnetic field. The magnetic stirring can improve the welding morphology, reduce the number of pores in welding joints, refine the acicular FeAl3 phase, and inhibit the growth of brittle Fe/Al compounds, which thus improves the mechanical properties of welding joints.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2017年第9期99-106,共8页
Chinese Journal of Lasers
基金
江苏省普通高校学术学位研究生科研创新计划(KYZZ16_0330)
常州市高技术研究重点实验室开放基金(CM20153001)
关键词
激光技术
磁场搅拌
钢/铝异种金属
激光焊接
金属间化合物
laser technique
magnetic-field stirring
Fe/Al dissimilar metal
laser welding
intermetalliccompounds
