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介绍了GB8337-2008中的易熔合金的特点,研制了熔点为70℃的共晶易熔合金,并用SEM等手段观察分析了材料的组织和性能。结果表明:该共晶合金主要由Bi元素构成,基体组织为Bi基体+(Bi+Pb)共晶体+富(Sn+Cd)固溶体,平坦大块状区域为Bi基体,疏松状区为(Bi+Pb)共晶体,岛状及小块状区域为富(Sn+Cd)固溶体,并有富铅的长条剥落区。
The characteristics of fusible alloy in GB8337-2008 were introduced. The eutectic fusible alloy with melting point of 70 ℃ was developed. The microstructure and properties of the alloy were observed and analyzed by SEM and other means. The results show that the eutectic alloy is mainly composed of Bi, the matrix structure is Bi matrix + (Bi + Pb) eutectic + Sn + Cd solid solution, the flat bulk region is Bi matrix, + Pb) co-crystal, islands and small patches of the region is rich (Sn + Cd) solid solution, and lead-rich strip spalling area.