过共晶Al-Si合金初生Si的热处理球化研究  

Spheroidization of Primary Silicon in Hypereutectic Al-Si Alloy by Heat Treatment

作　　者：卢才璇 吴昊 马恒[3] 王利民 钱苗 汤超[1,2] 何卫 陈胜男 Lu Caixuan;Wu Hao;Ma Heng;Wang Limin;Qian Miao;Tang Chao;He Wei;Chen Shengnan(Nanrui Group Co.,Ltd.(State Grid Electric Power Research Institute Co.,Ltd.),Nanjing 211106;Wuhan NARI Limited Liability Company,State Grid Electric Power Research Institute,Wuhan 430074;Zhejiang Huadian Equipment Testing Institute Co.,Ltd.,Hangzhou 310015)

机构地区：[1]南瑞集团有限公司(国网电力科学研究院有限公司),南京211106 [2]国网电力科学研究院武汉南瑞有限责任公司,武汉430074 [3]浙江华电器材检测研究院有限公司,杭州310015

出　　处：《特种铸造及有色合金》2024年第3期372-376,共5页Special Casting & Nonferrous Alloys

基　　金：国家电网公司科技指南资助项目(SGZJ0000KXJS2100125)。

摘　　要：以过共晶Al-24Si合金为研究对象,对经过变质处理的Al-24Si合金进行固态扩散加热、半固态加热处理,促使初生Si均匀、球化,确定了优化处理工艺,以提高合金性能。结果表明,固态扩散加热最佳参数为540℃保温12 h,初生Si逐渐长大并钝化;半固态加热最佳参数为615℃保温15 min,初生Si形态明显改善、球化,形状因子可达到0.80以上。The modified hypereutectic Al-24Si alloy was subjected to solid state diffusion heating and semi-solid heating treatment to promote the homogenization and spheroidization of primary silicon,and the optimal process was determined to improve the properties.The results indicate that the optimal heating parameter of solid state diffusion is 540℃for 12 h,and primary silicon is grown up and become passivated.The optimal parameter for semi-solid heating is 615℃for 15 min,and morphology of primary silicon is significantly improved and spheroidized,where the shape factor can reach above 0.80.

关 键 词：过共晶铝硅合金 初生SI 固态扩散加热 半固态加热 球化 

分 类 号：TG146.21[一般工业技术—材料科学与工程]