摘要
利用超声波辅助钎焊的方法,在大气环境、中温、无钎剂条件下,实现了铝合金与薄膜铝/铁复合板的高强、可靠连接.研究了采用Zn-Al,Al-Si钎料得到的焊缝组织及其性能.结果表明,采用Zn-Al钎料钎焊5A06铝合金和复合板,超声波能有效破除氧化膜,铝膜溶解扩散易于控制,焊缝没有金属间化合物,在铝层未完全溶解时,抗剪强度均大于70 MPa,焊缝由α-Al,η-Zn,共晶和共析组织构成;采用Al-Si钎料钎焊1100纯铝和复合板,复合板铝膜短时间内完全溶解,焊缝存在复杂的Fe-Al-Si三元化合物,并发现明显的裂纹,抗剪强度约为20 MPa.
Al /Fe clad materials joining with Al alloy were successfully realized at intermediate temperature without flux in air by using ultrasonic-assisted brazing. Mechanical properties and microstructure of joints with Zn-Al and Al-Si filler metals were studied. The experiment showed that the oxide film of Al film at clad materials were effectively removed when Al / Fe clad materials were brazed with 5A06 alloy by using Zn-Al filler metal. Diffusion of Al film was easily controlled. There were not FeAl intermetallic compounds in the joins. Shear strength of joints was higher than 70 MPa when the Al film was not completely dissolved. The joints were composed of α-Al,η-Zn,Zn-Al eutectic and Zn-Al eutectoid. When Al / Fe clad materials were brazed with 1100 Al by using Al-Si filler metal,the Al film was completely dissolved in a short time. Fe-Al-Si intermetallic compounds and microcracks were observed and the shear strength was only 20 MPa.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2013年第10期47-50,115,共4页
Transactions of The China Welding Institution
基金
国家国际科技合作项目(2011DFR50630)
哈尔滨市科技创新人才研究专项资金项目(2012RFXXG071
2010RFQXG020)
