近液相线铸造6063铝合金二次加热组织  

Reheating Analysis of 6063 Aluminum Alloy by Near-Liquidus Casting

作　　者：李赫[1] 路贵民[1] 崔建忠[1] 

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室

出　　处：《特种铸造及有色合金》2007年第S1期364-367,共4页Special Casting & Nonferrous Alloys

基　　金：教育部科学技术研究重点项目(106058);教育部博士点基金资助项目(20050145007);国家教育部新世纪优秀人才支持计划资助(NCET-04-0279)

摘　　要：研究了近液相线铸造6063合金锭坯在半固态二次加热过程中的组织变化。结果表明,在固液两相区内,随着加热温度的升高,α相的生长和球化速度变快。本试验中,二次加热的最佳工艺制度为630℃下保温30min,或者640℃下保温25min,此时液相体积分数为23%左右,晶粒平均等级圆直径为160μm左右。The change of the structure of 6063 aluminum alloy by near-liquiduscasting during reheated was studied. It is found that growth and globe rate of αphase were increased with the reheating temperature in solid-liquid phase zone. The best technical parameters of reheating is 630 ℃ at 30 minutesor 640 ℃ at 25 minutes. Under these conditions,its volume fraction of liquid is about 23%,and the Average equal-area-circle grain diameter is about 160 μm.

关 键 词：半固态 6063合金 二次加热 近液相线铸造 液相体积分数 晶粒平均等级圆直径 

分 类 号：TG146.2[一般工业技术—材料科学与工程]