摘要
研究了Ti(CN)和V(CN)变质剂对铸造Al-Cu-Mn合金微观组织和力学性能的影响。结果表明,当添加量为0.02%时,变质剂Ti(CN)和V(CN)均能有效地细化铸造Al-Cu-Mn合金的基体晶粒并显著改善第二相Al2Cu的形态与分布,从而提高铸造铝合金的综合力学性能。Ti(CN)和V(CN)变质剂对铝合金晶粒的细化是一种异质形核机制,并且由于V(CN)的粒径更细小,点阵常数与铝更接近,其变质效果比Ti(CN)更佳。
Casting Al-Cu-Mn alloy was refined with grain refining powders Ti（CN） and V（CN）, respectively. The results show that when added 0.02wt.%, both Ti （CN） and V （CN） powder grain refiners can effectively refine the grain size of casting A1-Cu-Mn alloy, and the morphology and distribution of the second phase AI：Cu are also improved markedly, which improves the comprehensive mechanical properties of samples. The grain refining mechanism of Ti （CN） and V （CN） are both heterogeneous nucleation. The grain refining ability ofV （CN） powder is better than that ofTi （CN） powder, resulting from the smaller sizes and closer lattice constants to that of Al.
出处
《铸造技术》
CAS
北大核心
2012年第3期308-310,共3页
Foundry Technology
