ZL201合金液相线铸造组织与成形性能  

Microstructures of ZL201 Alloy Obtained by the Liquidus Casting and Thixoforming Properties

作　　者：王平[1] 康皓[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,辽宁沈阳110004

出　　处：《材料科学与工程学报》2006年第2期183-186,共4页Journal of Materials Science and Engineering

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

摘　　要：研究了近液相线半连续铸造ZL201合金的微观组织及其在二次加热过程中的变化。在液相线温度下半连续铸造的ZL201合金组织为均匀、细小的蔷薇状组织,晶粒的平均等积圆直径为43.6μm,晶粒平均圆度为1.88。经二次加热后,铸造组织逐渐转变为等轴晶。在620℃下加热20min后,晶粒平均等积圆直径为111μm,晶粒平均圆度1.42。在640℃下加热20min后,晶粒平均等积圆直径为108μm,晶粒平均圆度1.58,半固态压铸件硬度可达到116.6HV。结果表明,液相线半连续铸造可以获得理想的半固态坯料。The casting and remelted microstructures of ZL201 alloy cast by liquidus semi-continuous casting （LSC）were studied.The microstructures cast at liquidus temperature（650℃ ）by LSC is uniform, fine and rose flowered. The average equal-area-cirele grain diameter is 43.6μm and the average roundness is 1.88. The casting microstructures are gradually turned into equiaxed grains by being remelted. After the casting billet are soaked at 620℃ for 20min, the average equal-area-circle grain diameter is 11 μm and the average roundness is 1.42. After the casting billet is soaked at 640℃ for 20min, the average equal-area-circle grain diameter is 108μm and the average roundness is 1.58 .The rigidity value of ZL201 alloy thixoforming part is 116.6Hr. The results show that fine semi-solid slurries of ZL201 alloy can be obtained by SLC.

关 键 词：近液相线 半连续铸造 半固态 非枝晶 二次加热 性能 

分 类 号：TG292[金属学及工艺—铸造]