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研究了钎焊温度对钎焊接头微观组织的影响 ,并利用图像软件Image ProPlus确定了不同初始凝固温度下α (Al)相在钎焊接头中的体积分数。结果表明 :随着初始凝固温度增加 ,α (Al)相所占的比例增大。通过成分分析 (EPMA)和硬度测试 ,分析了硅扩散层的特征。压痕法测试结果表明 :不同初始凝固温度下获得的同种组织 ,其力学和物理等综合性能不同 ,从而造成整个钎焊接头力学性能的差异。
The influence of the brazing temperature on the microstructure of the brazed joint was investigated. The volume fraction of the α (Al) phase in the brazed joint at different initial solidification temperatures was determined using Image ProPlus software. The results show that as the initial solidification temperature increases, the proportion of α (Al) phase increases. The characteristics of the silicon diffusion layer were analyzed by compositional analysis (EPMA) and hardness testing. The indentation test results show that the same kind of microstructure obtained at different initial solidification temperatures has different mechanical and physical properties, which leads to the difference of mechanical properties of the whole brazed joint.