晶粒细化工艺对AM60镁合金组织性能的影响  

Effects of Grain Refinement Methods on Microstructure and Mechanical Properties of AM60 Magnesium Alloys

作　　者：王朝辉[1] 康永林[1] 赵鸿金[1] 徐跃[1] 

机构地区：[1]北京科技大学

出　　处：《特种铸造及有色合金》2006年第4期199-201,共3页Special Casting & Nonferrous Alloys

基　　金：国家高科技研究发展(863)资助项目(2002AA336080);国家重点基础研究发展规划(973)项目(G2000067302)

摘　　要：简述了MgAl系镁合金的晶粒细化工艺。利用X射线荧光光谱仪、光学显微镜、布氏硬度计、电子天平和MTS材料试验机等设备研究了C2Cl6作为晶粒细化剂对AM60镁合金铸件成分、密度、显微组织和力学性能等的影响。结果表明,C2Cl6能够起到良好的晶粒细化效果,可以显著地提高铸件的力学性能。在最佳使用量下,铸态AM60镁合金的晶粒尺寸可以从未使用C2Cl6时的250μm减小到70μm,抗拉强度和伸长率分别为237MPa和18.9%,分别提高了11.3%和65.8%。同时,对C2Cl6在MgAl系镁合金中的晶粒细化与性能强化机理进行了探讨。Several kinds of grain refinement processes for Mg-Al series alloy were surveyed.Effects of C_2Cl_6 on the composition,density,microstructure and mechanical properties of the AM60 alloy were investigated by XRF spectrometer,optical microscope,Brinell hardness tester,electronic balance and MTS material testing machine etc.The results show that C_2Cl_6 has good effects on grain refinement,greatly improving the mechanical properties of the AM60 alloy castings.Compared with those of the alloy free C_2Cl_6,the grain size of as-cast AM60 alloy with the optimum addition of 1% C_2Cl_6 can be decreased from 250 μm to 70 μm,and tensile strength is 237 MPa and elongation is 18.9%, increased by 11.3% and 65.8%,respectively.Furthermore,the mechanisms of grain refinement and strengthening of Mg-Al series alloy with C_2Cl_6 were approached.

关 键 词：镁合金 晶粒细化 C2Cl6 显微组织 力学性能 机理 

分 类 号：TG113[金属学及工艺—物理冶金]