超声辅助电阻钎焊6063铝合金接头显微组织的演变  

Microstructure Evolution of Ultrasonic-Assisted Electrical Resistance Brazing Joints of 6063 Aluminum Alloys

作　　者：俞伟元[1] 吴炜杰[1] 孙学敏[1] Yu Weiyuan;Wu Weijie;Sun Xuemin(State Key Laboratory of Advanced Processing and Recycling on Non-Ferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学甘肃省有色金属先进加工与再利用国家重点实验室

出　　处：《稀有金属材料与工程》2019年第12期4081-4087,共7页Rare Metal Materials and Engineering

基　　金：国家自然科学基金（51465032）

摘　　要：采用超声辅助电阻钎焊方法实现Zn-2Al钎料与6063铝合金的连接,研究了声场及电场对接头微观组织演变的影响。结果表明,钎焊过程中施加超声振动能够有效促进钎料与母材形成有效连接,减少缺陷从而形成良好冶金性结合的钎焊接头,且钎缝层微观组织更加均匀细小。另外,超声功率和电流强度均对钎焊过程的溶解有显著影响,随着超声功率增加,母材的溶解加剧,钎缝中Al含量增加,共析α-Al相增多;而随着电流的增大,初晶α-Al相增多。A Zn-Al alloy was used as filler metal to braze 6063 aluminum alloy using ultrasonic-assisted electrical resistance-brazing technology. The effects of ultrasonic field and electric field on the microstructure evolution of the joints were studied, and its mechanism was also analyzed. The results show that applying ultrasonic vibration to substrate during brazing process could effectively promote the effective connection between the filler metal and base metal, reduce the defects, and improve homogeneity;thus the joints with good metallurgical bonding are obtained. In addition, both ultrasonic power and electrical current intensity have significant effect on the dissolution during the brazing process. With the increment of ultrasonic power, the dissolution of the base metal is intensified, the Al content in the brazing seam increases, and the eutectoid α-Al phase increases. As the electrical current increases, the primary α-Al phase increases.

关 键 词：6063铝合金 超声辅助电阻钎焊 超声功率 电场强度 

分 类 号：TG454[金属学及工艺—焊接] TG146.21[一般工业技术—材料科学与工程]