铸造过共晶铝硅合金组织特性及变质处理探讨  

Discussion on Microstructure Characteristics and Modification Treatment of Casting Hypereutectic Al-Si Alloy

作　　者：张凯[1] ZHANG Kai(Department of Architecture and Environmental Engineering,Sichuan Vocational and Technical College,Suining 629000,China)

机构地区：[1]四川职业技术学院建筑与环境工程系,四川遂宁629000

出　　处：《四川职业技术学院学报》2020年第6期161-164,共4页Journal of Sichuan Vocational and Technical College

摘　　要：本文分析了过共晶铝硅合金的成分和显微组织特征,研究了过共晶铝硅合金变质机理,发现过共晶铝硅合金主要通过异质核心变质机制和吸附毒化变质机制添加变质剂进行变质细化,另外电磁搅拌、熔体预处理、快速凝固和超声波等方法也能进行变质细化,这样的细化处理能够显著提高过共晶铝硅合金的机械力学性能和化学耐蚀性能。In this paper,the composition and microstructure characteristics of the hypereutectic Al-Si alloy are analyzed,and the modification mechanism of the hypereutectic Al-Si alloy is studied.It is found that the hypereutectic Al-Si alloy is mainly modified by the heterogeneous core modification mechanism and the adsorption poisoning modification mechanism.In addition,methods such as electromagnetic stirring,melt pretreatment,rapid solidification and ultrasonic can also be used for modification refinement,which can significantly improve the mechanical properties and chemical corrosion resistance of hypereutectic Al-Si alloy.

关 键 词：过共晶铝硅合金 组织特性 变质机理 变质 

分 类 号：TG146.2[一般工业技术—材料科学与工程]