Cu23%In合金凝固组织随冷却速度变化规律

Relationship of the Structure and Cooling Rate During Solidification of Cu-23%In Alloy

采用不同的冷却速度,制备了Cu 23%In合金试样。在对试样进行显微组织分析、宏观组织分析、电子探针分析和SEM扫描电子显微分析的基础上,研究了合金的显微组织、宏观组织和晶粒形态等特点,及其与冷却速度的关系,结果表明,Cu 23%In合金在金属型冷却条件下以枝晶方式凝固,最终组织为α枝晶相和枝晶间δ相。冷却速度对Cu 23%In合金的组织有明显的影响。

The specimens of Cu-23%In alloys were prepared at different cooling rates. By means of microstructure analysis, macrograph analysis, electron probe and scanning electronic microscope analysis, the microstructure and morphology of specimen studied. The relationships between structures and cooling rates were also investigated. The results showed that the way of growth of Cu-23%In alloy is dendritic under the condition of metal mold cooling, the final microstructure consists of α dendrites and δ phase among the dendrites. The cooling rate has outstanding effect on the microstructure and dendritic morphology as well as grain shape of the Cu-23%In alloys.