高等学校化学学报

高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (11): 1503.

• 论文 • 上一篇    下一篇

微量元素Sr对Al-Si合金凝固过程的影响

王子忱, 王晓惠, 张丽华, 赵慕愚   

  1. 吉林大学化学系, 长春, 130023
  • 收稿日期:1990-07-16 出版日期:1991-11-24 发布日期:1991-11-24
  • 通讯作者: 王子忱

Effect of Trace Modifier Sr on Solidification Process of Al-Si Alloys

Wang Zi-chen, Wang Xiao-hui, Zhang Li-hua, Zhao Mu-yu   

  1. Department of Chemistry, Jilin University, Changchun, 130023
  • Received:1990-07-16 Online:1991-11-24 Published:1991-11-24

PDF (PC)

被引次数

6

摘要： 用差热分析法系统地研究了Sr对Al-Si共晶、亚共晶及超共晶合金的动态凝固过程的影响。结果表明,Sr既可促进α-Al成核,使其初晶析出温度比二元合金中α-Al相析出温度明显提高,又能抑制初晶Si成核,使超共晶中初晶Si相析出温度较二元合金中Si的初晶的实际析出温度明显降低,还能促使共晶合金成核,使加Sr后的共晶析出温度明显提高。

关键词: Al-Si合金, 凝固过程, Sr的影响

Abstract: The influence of Sr on the solidification process of Al-Si alloys was systematically investigated by differential thermal analysis. The results obtained show that Sr in the meit raised the primary α-Al nucleation temperature and the temperature of eutectic solidification, and retarded the primary silicon nucleation. It is, therefore, possible that rich Al phase is the leading crystallization phase during the Al-Si eutectic alloys solidification.

Key words: Al-Si alloys, Solidification process, Influence of Sr

TrendMD: