摘要
钎料铸锭成分均匀性及组织形态是钎料成形的初始条件,对钎料塑性加工性能及加工后组织有重大的影响.通过OM,SEM和EDS等分析测试手段,研究了BAg30CuZnSn钎料铸锭的微区成分变化规律.结果表明,BAg30CuZnSn钎料铸锭中,沿径向由外向内方向,Ag元素含量逐渐降低,Cu,Zn元素含量逐渐升高.冒口处,由下到上,Ag元素含量逐渐降低,Cu,Zn元素含量逐渐升高.成分的变化导致铸锭组织发生变化,从铸锭外部到中心部位,晶粒尺寸逐渐粗大,呈现出由最初的随机分布转向成簇分布.铸锭中心位置出现Ag元素含量较高的枝晶,为银的富集相.
The homogeneity and microstructure of the brazing filler metal ingot are the initial conditions for the formation of brazing filler metal. These initial conditions have a significant effect on the plastic working performance and the post-processing microstructure of the brazing filler metal. The microstructures of BAg30 CuZnSn brazing filler metal ingot were studied by means of OM,SEM and EDS. The results show that in the brazing filler metal ingot: Along the radial direction from the outside to the inside,Ag content gradually decreased,Cu,Zn content gradually increased. From bottom of the riser to top,Ag content gradually decreased,Cu,Zn content gradually increased. The change of the composition leads to the change of the ingot microstructure.From the external of the ingot to the central part,the grain size is gradually increased,showing the distribution from the initial random distribution to the cluster distribution. In the center of the ingot,the main phase is dendrites of rich Ag.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2018年第5期82-86,共5页
Transactions of The China Welding Institution
基金
国家国际科技合作计划项目(2015DFA50470)
关键词
钎料铸锭
组织
微区成分
成分偏析
brazing filler metal ingot
microstructure
micro-composition
component segregation
