不同成分铝硅合金熔体混合对初生硅相细化的研究_叶春生.pdfVIP

Vol151 No13 铸 造 Mar. 2002 FOUNDRY # 145 # 1 2 3 4 叶春生 , 宋俊杰 , 张新平 , 潘 冶 ( 11 康佳集团股份有限公司, 广东深圳 5 18053; 21 洛阳自来水公司洛南水 , 河南洛阳471023; 31 吉林大学南岭校区材料科学与工程学院, 吉林长春 130025; 41 东南大学机械工程系, 江苏南京210096) : 研究了高温过共晶A-l Si 合金熔体和低温亚共晶A-l Si 合金熔体混合后对微观组织的影响结果表明: 熔体混合 并迅 搅拌后的初晶硅大大细化, 在2min 内浇注, 可以获得分布均匀且尺寸小于25Lm 的初晶硅; 随着熔体保持时间 的延长, 初晶硅的尺寸有增大的趋势探讨了对硅相的细化机理 : A-l Si ; ; ; : T G113112 : A : 1001-4977 ( 2002) 03-0145-03 Investigation on Refining Granules of Primary Si Phase by Melt Mixing with Different Components of A-l Si Alloys 1 2 3 4 Y Chun-sheng , SONG Jun-jie , ZHANGXin-ping , PANYe (11Konka Group Co. Ltd., Shenzhen518053, Guangdong, China; 21Luoyang water supply company (Luonanfountain), Luoyang 471023, Henan, China; 31College of Materials Science and ngineering, Jilin University (Nanling Campus) , Changchun 130025, Jilin, China; 41Department of Mechanical ngineering, Southeast University, Nanjing 210096 , Jiangsu, China) Abstract: ffect of melt treatment by mixing the high temperature hypereutectic A-l Si alloy melt and the low temperature hypoeutectic A-l Si alloy melt on microstructure is investigated in this paper. It is found that primary Si granuleshave beengreatly refined inthe optimummelt mixingcondition. Primary Si part-i cle size is reducedto 25Lmpoured intwo minutes, thealloy microstructure has beenobviously improved. Withthe extending of holdingtimes, Primary Si particlesize has atendency of graingrowing. The mecha- nismof refining granules of primary Si phase is also studied. Keywords: hypereutectic A-l