ZL201合金半固态触变压铸的组织与性能  

Microstructure and Property of ZL201 Alloy by Semi-Solid Thixodie-Casting

作　　者：史立峰[1] 赵大志[2] 王平[3] 崔建忠[3] 

机构地区：[1]辽宁装备制造职业技术学院塑性成形系,辽宁沈阳110161 [2]东北大学材料与冶金学院,辽宁沈阳110004 [3]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：《铸造》2012年第4期386-388,395,共4页Foundry

基　　金：国家自然科学基金资助项目(50771030);国家863高技术研究发展计划资助项目(2009BAE80B01)

摘　　要：研究了ZL201合金半固态触变压铸组织与性能,包括半固态坯料的制备、二次加热、压铸成形和成形件的热处理。结果表明:采用低频电磁搅拌半连续铸造制备的ZL201合金半固态坯料的微观组织为均匀、细小的非枝晶,在630℃下保温20 min可获得均匀的近球形二次加热组织。半固态压铸件的组织为较大的棒状、近球状的初生固相和由细小枝晶、等轴晶组成的二次固相,而且组织致密、内部无气孔。半固态压铸件经过535℃固溶9 h和175℃时效6 h处理后,硬度最大为HV 116.6。The microstructures and properties of semi-solid die-casting ZL201 alloy were investigated, including semi-solid ingot preparation, reheating, die-casting forming, solution and aging treatment, etc. The results show that the homogeneous, fine and non-dentritic microstructure can be successfully obtained by low frequency electromagnetic stirring semi-continuous casting. The microstructure is gradually turned into near-spherical grain, which is suitable for thixodie-casting by remelting at 630 ℃ for 20 min. The microstructure of the semi-solid thixodie-casting part consists of coarse rod or near-spherical primary solid phase and fine dentritic or equiaxed second solid phase, but more compact than that of the conventional die-casting part. After treatment, i.e. solution at 535 ℃ for 9 h and aging at 175 ℃ for 6 h, the hardness of the semi-solid thixodie-casting part is HV 116.6.

关 键 词：ZL201合金 半固态 二次加热 触变压铸 

分 类 号：TG27[金属学及工艺—铸造]