Abstract：For aluminum/steel laser brazing-welding, metal coating on the surface of steel has an important impact on the performance of aluminum/steel joint. Spreading effect of the liquid of 5A06 aluminum alloy on low carbon steel surface with the various metallic coatings was studied. Microstructure of the interface, thickness and kinds of intermetallic compound of the welding-brazing joint were analyzed by SEM, and the mechanical properties and fracture appearance of aluminum/steel joint with different metallic coatings on steel were further investigated. The results show that the spreading effect and infiltration are impaired by metal coating on the steel surface in the aluminum/steel laser welding-brazing. The spreading effect of aluminum lap with aluminized steel is the best, and the tensile property of the lap joint of aluminum alloy and aluminized zinc steel is the best, which accounted to base metal aluminum alloy for 70%. The Fe2Al5, FeAl3 and FeAl intermetallic compounds are discovered at the weld interface of aluminum/steel laser brazing-welding by using aluminum-coated steel, aluminized steel or galvanized steel, and the Fe4Al13 intermetallic compounds is existed in the interface of aluminum/steel with nickel plated steel.
黄健康, 王梓懿, 刘宁, 余淑荣, 樊丁. 金属镀层对铝/钢激光熔钎焊接头组织与性能的影响[J]. 材料工程, 2018, 46(5): 99-105.
HUANG Jian-kang, WANG Zi-yi, LIU Ning, YU Shu-rong, FAN Ding. Effect of Metal Coating on Microstructure and Properties of Aluminum/Steel Laser Welding-Brazing Joint. Journal of Materials Engineering, 2018, 46(5): 99-105.
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