Cu和Sn对钎焊料4343Al合金组织性能的影响  

Effect of Cu and Sn Addition on Microstructure and Properties of Brazing Filler 4343 Al Alloy

作　　者：赵媛媛[1] 章桢彦[1] 靳丽[1] 董杰[1] 

机构地区：[1]上海交通大学材料科学与工程学院轻合金精密成型国家工程研究中心,上海200240

出　　处：《材料研究学报》2016年第4期292-298,共7页Chinese Journal of Materials Research

摘　　要：通过添加0-1.0%(质量分数)的Cu或Sn来合金化4343合金,获得一种熔点更低、抗塌陷性能更优良的钎焊材料。熔点测试结果表明,随Cu或Sn含量的增加,合金的固相线温度和液相线温度逐渐降低,添加1.0%的Cu或Sn后合金固相线温度、液相线温度降低10-15℃。微观组织和挤压变形后力学性能研究结果表明,随Cu或Sn含量的增加,铸态合金中含Cu的第二相量或Sn颗粒逐渐增多;热挤压后含Cu第二相趋于溶解,而Sn促进含Si、Fe第二相溶解;合金室温抗拉强度逐渐升高,但延伸率略有降低。模拟钎焊实验结果表明,添加Cu或Sn可降低4343合金的可钎焊温度,添加1.0%的Cu或Sn可使钎焊温度降低15-20℃。The 4343 Al-Si alloy is the most widely used brazing filler metal for the multi-layer aluminum clad sheets, which act as radiator fin for aluminum heat exchanger. In this paper, 0-1.0%（mass fraction） Cu or Sn was added to 4343 alloy in order to develop a new brazing filler metal with lower melting point and better collapse resistance. The results show that with the increase of Cu or Sn, the solidus and liquidus of the alloys decrease gradually, and when the Cu or Sn content is increased to 1.0%, the solidus and liquidus will be reduced by 10-15℃ respectively. With the increase of Cu ro Sn content, the Cu bearing intermetallic phases or the Sn particles increase in the cast alloy; after hot extrusion the Cu bearing intermetallic phases dissolve and Sn particles can induce the dissolution of Fe-Si bearing intermetallic phases; the tensile strength increases gradually while the elongations decrease a little. The results of trial brazing show that the addition of Cu or Sn will decrease the brazing temperature, particularly, the brazing temperature can be reduced by more than 15℃ for the filler alloys with 1.0% of Cu or Sn.

关 键 词：金属材料 4343铝合金 微合金化 熔点 钎焊 

分 类 号：TB331[一般工业技术—材料科学与工程]