Microstructure of Casting High-Silicon Aluminum Alloy with Additions of Co and RE*

摘要：

It has significance to further enhance the high-temperature properties of hypereutectic Al-Si alloys for its utilization in manufacture of engine parts. In this paper, high silicon Al-20Si-2Cu-l Ni-xCo casting alloys have been prepared out with complex modification of RE-P, and the change of microstructure of the casting alloys under additions of Co and RE at the same time has been studied. The results show that, the content of Co varyingfrom0 -1. 5％ has little influence on the refining effect of P on primary Si and the modification effect of RE on eutectic Si, but the amount of acicular RE-bearing compounds gradually increases with the increase of Co content. In addition, the addition of Co has the effect of neutralizing the harmful effect of Fe, and the Fe-contAlning intermetallic compound presents as particles instead of long needles.

关键词： high-silicon aluminum alloy microstructure cobalt rare earth intermetallic compound

作者: Wu Shusen Sha Men Zhong Gu Y. Fukuda H. Nakae

作者单位: State Key Lab of Materials Processing and Die & Mould Technology,Huazhong University of Science and Kimura Foundry Co Ltd, Shizuoka411, Japan Department of Materials Science and Engineering, Waseda University, Tokyo 169, Japan

会议类型: 国际会议

会议名称: 69th World Foundry Congress(第69届世界铸造会议 WFC 2010)

会议地点: 杭州

会议语种:英文

页码: 216-219

在线出版日期: 2010-10-16（万方平台首次上网日期，不代表论文的发表时间）