工业纯镁的往复挤压工艺及晶粒细化效果  

Reciprocating Extrusion Technology and Grain Refinement of Industrial Pure Magnesium

作　　者：陈思杰[1] 

机构地区：[1]河南理工大学材料科学与工程学院,焦作454000

出　　处：《机械工程材料》2012年第4期9-11,36,共4页Materials For Mechanical Engineering

基　　金：以色列工学院博士后基金资助项目;河南理工大学博士基金资助项目(648313);材料加工学科预研基金资助项目(506081)

摘　　要：在150,175,200,225,250℃对工业纯镁进行不同道次的往复挤压,用光学显微镜研究了挤压温度和挤压道次对晶粒细化效果的影响。结果表明:150℃是工业纯镁能够进行往复挤压的最低温度;随着挤压温度的升高,工业纯镁的塑性提高,挤压应力下降,但晶粒细化效果有所下降;随着挤压道次增加,晶粒进一步细化;最佳挤压温度为200℃,最佳挤压道次为4次。Reciprocating extrusion for different passes was carried out for industrial pure magnesiums at 150,175,200,225,250 ℃.The effects of extrusion temperature and passes on grain refinement were studied by optical microscopy.The results show that the minimum temperature for reciprocating extrusion of industrial pure magnesium was 150 ℃.With the increase of extrusion temperature,the plasticity of industrial pure magnesium increased and the extrusion stress decreased,but the grain refinement effect became worse.With the increase of the extrusion passes,the grain size was refined further.The best extrusion temperature was 200 ℃,and the optimal extrusion passes was 4.

关 键 词：往复挤压 工业纯镁 再结晶 显微组织 

分 类 号：TG376.3[金属学及工艺—金属压力加工]