Sn9Zn-0.75SiC(μm)-xSiC(nm)超声波辅助钎焊6061铝合金的组织与性能研究  

Study on ultrasonic assisted soldering of 6061Al with Sn9Zn-0.75SiC(μm)-xSiC(nm)solder

作　　者：王剑[1] 丁敏[1] 席亚斌 赵格龙 WANG Jian;DING Min;XI Yabin;ZHAO Gelong(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi pro.,China)

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《焊接技术》2022年第1期76-80,I0002,共6页Welding Technology

摘　　要：文中研究了Sn9Zn-0.75SiC(μm)-xSiC(nm)(x=0.25%,0.5%,0.75%,1.0%)(质量分数)复合钎料在超声波作用下对6061铝合金搭接接头的性能影响规律。试验结果表明,在双重尺寸SiC颗粒的共同作用下,富Zn相的数量及尺寸有效减少,Sn-Zn共晶组织的外形发生了由棒状到针状再到球状的变化,且在SiC纳米颗粒的含量为0.75时表现出区域方向性的针状排列,并且最高抗剪强度达到最高,约130 MPa,相比于无添加SiC纳米颗粒提高了约28.72%。Al_(4)C_(3)金属间化合物的分布以及Al-Zn固溶体层的形成(Al_(0.71)Zn_(0.29)和Al_(0.403)Zn_(0.597)),增加了界面的Al-C键和Al-Zn键连接,有效提高了界面强度。Under the ultrasound, the influence of Sn9Zn-0.75SiC(μm)-xSiC(nm)(x=0.25, 0.5, 0.75, 1.0 wt.%) composite solder on the properties of 6061Al joints was explored. It showed that under the combined action of the dual-sized SiC particles, the number and the shape of the Zn-rich phases were effectively decreased, and the shape of the Sn-Zn eutectic structure had changed from rod-like to needle-like, and finally to spherical. When the content of SiC nanoparticles was 0.75 wt.%, it showed a regionally directional needle-like arrangement, and the maximum shear strength reached 130 MPa, compared with no SiC nanoparticles addition increased by about 28.72%. The distribution of Al;C;intermetallic compounds and the formation of Al-Zn solid solution layers(Al;Zn;and Al;Zn;) increased the Al-C bond and Al-Zn bond connection at the interface, effectively improving the interface strength.

关 键 词：6061铝合金 超声波 SN-9ZN钎料 纳米SIC颗粒 

分 类 号：TG454[金属学及工艺—焊接]