低过热度电磁铸造合金组织与性能  

Structure and performance of electromagnetism casting in low-over-heating

作　　者：王平[1] 郑连辉[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：《材料科学与工艺》2007年第5期738-740,共3页Materials Science and Technology

基　　金：国家自然科学基金资助项目(50374031);国家高技术发展计划资助项目(2002AA337010;2003AA305090);辽宁省自然科学基金资助项目(20031011).

摘　　要：采用电子显微镜、图象分析仪及维氏硬度计,研究了近液相线电磁铸造(NLEMC)、电磁铸造(EMC)、近液相线铸造(NLC)合金浆料的显微组织,并对其流变成形件的硬度进行了测定.结果表明,近液相线电磁铸造(NLEMC)合金浆料的组织为细小、均匀的等轴晶组织,其晶粒平均等积圆直径为32.8μm,其流变成形件的维氏硬度值为122.8Hv,均优于电磁铸造(EMC)和近液相线铸造(NLC)的合金组织与流变成形件的性能.并讨论了NLEMC晶粒细化的机理.Microstructures of ZL201 alloy slurry prepared by nearby liquidus electromagnetic casting （NLEMC）, electromagnetic casting（EMC）, and nearby liquidus casting（ NLC ）were studied by means of e- lectron microscope and image analysis apparatus. And the hardness was measured. The results show that the NLEMC can obtain the fine and uniform equiaxed grains structure, its average - area - circle grain diameter is 32. Stem, and its rheoforming parts＇ hardness is 122. 8Hv. All of these also show that the slurry microstructure and rheoforming properties of ZL201 prepared by nearby liquidus electromagnetic casting are the best in the three kinds of ways.

关 键 词：近液相线 电磁铸造 流变成形 组织 硬度 

分 类 号：TG249.7[金属学及工艺—铸造]