等径道角挤压对Mg-6Al合金性能的影响  

Influence of equal channel angular extrusion on the properties of Mg-6Al alloy

作　　者：姜巨福[1,2,3] 程远胜[1] 林鑫[3] 曲建俊[2] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,哈尔滨150001 [2]哈尔滨工业大学机械工程博士后流动站,哈尔滨150001 [3]西北工业大学凝固技术国家重点实验室,西安710072

出　　处：《材料科学与工艺》2010年第6期752-757,共6页Materials Science and Technology

基　　金：国家自然科学基金资助项目(51075099);西北工业大学凝固技术国家重点实验室开放课题资助项目(SKLSP201121);中国博士后基金资助项目(20090460884);黑龙江省自然科学基金资助项目(E201038);黑龙江省博士后启动基金资助项目(LBH-Q08104)

摘　　要：为了优化铸态Mg-6Al合金等径道角挤压的工艺参数,通过等径道角挤压实验研究了工艺参数对其性能的影响.研究表明:等径道角挤压可大幅度提高Mg-6Al合金坯料的力学性能.当Mg-6Al合金挤压1道次至4道次后,其力学性能提高较大,微观组织明显细化.随挤压温度从260℃升高至300℃,被挤压坯料的力学性能先提高后降低.当挤压路径为路径B,挤压道次为4道次,挤压温度为300℃时,Mg-6Al合金的力学性能最高,其抗拉强度为308.2 MPa,延伸率达到30.6%.To optimize the process parameters of equal channel angular extrusion （ECAE）, a series of ECAE experiments has been done to investigate the effects of process parameters of ECAE on the properties of Mg-6Al. The results show that the mechanical properties of Mg-6Al are improved greatly after being extruded. When the Mg-6Al alloy was processed by ECAE from 1 pass to 4 passes, the mechanical properties were increased evidently and the microstructure was refined well. When the extrusion temperature was increased from 260 ℃ to 300 ℃, the mechanical properties were increased at first and then decreased. The best mechanical properties of tensile strength of 308.2 MPa and elongation of 30. 6% could be obtained under such experimental conditions： test route B, 4 extrusion passes and extrusion temperature of 300 ℃.

关 键 词：等径道角挤压 MG-6AL合金 微观组织 力学性能 

分 类 号：TG376.8[金属学及工艺—金属压力加工]