过共晶铝硅合金中初晶硅复合异质形核的研究  

Study on Complex Heterogeneous Nucleation of Primary Silicon in Hypereutectic Al-Si Alloy

作　　者：王海生[1,2] 张英 易丹青[2] 刘会群 王斌[2] WANG Hai-sheng;ZHANG Ying;YI Dan-qing;LIU Hui-qun;WANG Bin(Department of Mechanical Engineering, Honghe University, Mengzi 661100, Yunnan, China;School of Material Science and Technology, Central South University, Changsha 410083, Hunan, China;Zhengzhou Non-Ferrous Metals Research Institute Co., Ltd., of CHALCO, Zhengzhou 450041, Henan, China)

机构地区：[1]红河学院机械工程系,云南蒙自661100 [2]中南大学材料科学与工程学院,湖南长沙410083 [3]中国铝业郑州有色金属研究院有限公司,河南郑州450041

出　　处：《铸造》2018年第4期344-348,共5页Foundry

摘　　要：采用磷变质细化过共晶铝硅合金中的初晶硅相,并对工业熔体中存在的多种粒子进行研究。结果表明,在过共晶铝硅合金中存在多种异质粒子(如Al P和Si O2)及复合异质粒子[如Al P/Si O2和Al P/(Al2O3+Si O2)]等多种形核中心,这些粒子都能为初晶硅相形核提供固相衬底。在工业合金熔铸过程中,需综合考虑多种粒子的异质形核作用。The primary silicon phase in the hypereutectic Al-Si alloy was refined by phosphorus modification, and various kinds of particles existing in the industrial melt were studied. The results show that there are heterogeneous particles （AlP and SiOz） and complex heterogeneous particles [AlP/SiO2 and AlP/（AlEO3＋SiO2）] in the melt, which provides the solid phase substrate for the nucleation of the primary silicon phase. In the casting process, the variety of roles by heterogeneous nucleation needs to be taken into account.

关 键 词：过共晶铝硅合金 初晶硅 磷变质 异质形核 

分 类 号：TG146.21[一般工业技术—材料科学与工程]