ZL201合金液相线铸造与二次加热的合金组织  

Casting and remelted microstructures of ZL201 alloy obtained by liquidus semi-continuous casting

作　　者：王平[1] 刘静[2] 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,沈阳110004 [2]东北大学理学院,沈阳110004

出　　处：《材料科学与工艺》2009年第1期43-46,共4页Materials Science and Technology

基　　金：国家自然科学基金资助项目(50374031);国家高技术研究发展计划资助项目(2002AA337010;2003AA305090);辽宁省自然科学基金资助项目(20082036)

摘　　要：为了研究半固态金属的成型规律,采用电子显微镜及图像分析仪,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.研究表明,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.研究表明,近液相线半连续铸造可以获得理想的ZL201合金半固态坯料.In order to study the rule of semi-solid metal forming, the casting and remelted microstructures of ZL201 alloy obtained by liquidus semi-continuous casting （ISC） were investigated by electron microscope and image analysis apparatus. Results show that the microstructures cast at liquidus temperature （ 650 ℃ ） by LSC are uniform, fine and rose flowered. The average equal-area-circle diameter of grains is 43.6 μm and the average roundness is 1.88. The casting microstructures are gradually turned into equiaxed grains by remehing. After the casting billet is soaked at 620 ℃ for 20 min, the average equal-area-circle diameter of grains is 111 μm and the average roundness is 1.42. After the casting billet is soaked at 640 ℃ for 20 min, the average equal-area-circle diameter of grains is 108 μm and the average roundness is 1.58. It is indicated that fine semi-solid slurries of ZL201alloy can be obtained by SLC.

关 键 词：近液相线铸造 半连续铸造 半固态 非枝晶 二次加热 

分 类 号：TG292[金属学及工艺—铸造]