Cu-Sc中间合金在Al液中的溶解

Dissolution of Cu-Sc Master Alloy in Liquid Al

摘要:

本文首次采用Cu-Sc中间合金,开发了Al合金加Sc新方法,研究了Cu-Sc中间合金在Al液中的溶解行为。发现随着保温温度提高和保温时间延长,含Sc质点(团)的尺寸减小,面积分数减少,凝固后在α Al基体中的Sc固溶量增加,短时间保温的合金凝固组织细小,随着保温温度提高和保温时间延长,合金凝固组织的晶粒尺寸逐渐增大。并根据含Sc质点尺寸和面积分数变化,分析了凝固组织的变化的原因。

Abstract:

A new way to add Sc in Al alloys using Cu-Sc master alloy was developed. The dissolution behaviors of Cu-Sc master alloy in liquid Al was investigated in this paper. It is was found that the size and areal fraction of particles bearing Sc decrease, the solid solution content of Sc in α Al after solidification increases with increase in holding time and temperature. The grain size of solidified ingots is finer in short holding time. While it increases with increase in holding time and temperature, which is resulted form reduction in the size and areal fraction of particle bearing Sc during dissolution.