ZL201铝合金近液相线半连续铸造组织研究  

The Microstructure Study on the Near-liquidus Semi-continuous Casting of ZL201 Aluminium Alloy

作　　者：王平[1] 史立峰[1] 路贵民[1] 

机构地区：[1]东北大学电磁材料过程研究教育部重点实验室,辽宁沈阳110004

出　　处：《轻合金加工技术》2005年第6期5-7,共3页Light Alloy Fabrication Technology

基　　金：国家自然科学基金资助项目(50374031);国家"八六三"高技术计划项目(2002AA337010);国家"八六三"高技术计划项目(2003AA305090);辽宁省自然科学基金资助项目(20031011)。

摘　　要：采用近液相线半连续铸造的方法制备了ZL201铝合金半固态锭坯。结果表明,合金熔体在略高于液相线温度(655℃)保温10min后浇注,可以获得适合半固态加工的均匀、细小的近球形组织,铸锭中心和边部组织差异小;相同冷却条件下,静置保温和较低铸造速度有利于均匀、细小的近球形组织的形成;对近液相线铸造组织的演变机理进行了初步探讨。本研究对加深近液相线铸造理论的深入研究、拓宽其适用范围有重要意义。The near-liquidus semi-continuous casting (LSC) process was used in casting ZL201 alloy. The results indicate that the microstructure of fine, uniform and global grains favored by semi-solid process was obtained when the billet was produced at the temperature (655℃) and the alloy melt was held for 10 min. Good effects on the formation of microstructure were related with holding time in near-liquidus and lower casting velocity. Additionally, the evolution mechanism of casting microstructure for near-liquidus casting was discussed.

关 键 词：Z1201铝合金 近液相线铸造 微观组织 形核 结晶 

分 类 号：TG249.7[金属学及工艺—铸造]