摘要
以Al-xAlZr5和KBF4为原料,制备不同Zr、B含量的Al-xZr-yB中间合金。实验研究添加不同的Al-xZr-yB中间合金后Al及Al-Si、Al-Mg-Si合金晶粒大小的变化,得到其对Al、Al-Si合金及Al-Mg-Si合金晶粒细化效果最优的Al-xZr-yB中间合金成分。结果表明:Al-2Zr-2B中间合金对Al的晶粒细化效果最优,Al-2Zr-1B中间合金对Al-Si合金和Al-Mg-Si合金的晶粒细化效果最优,且细化效果优于Al-5Ti-1B中间合金的。中间合金中含Zr的金属间化合物可作为有效的异质形核基质,供初级Al树枝晶形核。在Al-Si合金和Al-Mg-Si合金中添加Al-2Zr-1B中间合金可以有效改善其微观组织。
Al-xZr-yB master alloys with different Zr and B contents were prepared from Al, AlZr5 and KBF4 as raw materials. The grain size changes of Al and Al-Si, Al-Mg-Si alloys with different Al-xZr-yB master alloy contents were studied, and the Al-xZr-yB master alloy content with the best refining effect on Al, Al-Si alloy and Al-Mg-Si alloy was obtained. The results show that Al-2 Zr-2 B master alloy has the best grain refinement effect on pure Al, Al-2 Zr-2 B has the best grain refinement effect on Al-Si alloy and Al-Mg-Si alloy, and the refining effect is better than that of Al-5 Ti-1 B master alloy. The Zr-compounds intermetallics contained in the master alloys can be used as an effective heterogeneous nucleation matrix for the nucleation of primary Al dendrites. The microstructure of Al-Si alloy and Al-Mg-Si alloy can be significantly improved by adding Al-2 Zr-1 B master alloy.
作者
何立子
王新宇
王鑫
刘宏亮
HE Li-zi;WANG Xin-yu;WANG Xin;LIU Hong-liang(Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Shenyang 110819,China;School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China)
出处
《轻合金加工技术》
CAS
2021年第11期27-31,共5页
Light Alloy Fabrication Technology
