挤压比对固相再生ZM6镁合金组织和性能的影响  

Effect of Extrusion Ratio on Microstructure and Mechanical Properties of ZM6 Magnesium Alloys Prepared by a Solid Recycling Process

作　　者：文丽华[1] 王宝芹[1] 任忠先[1] 唐玉玲[1] 刘颖[1] 

机构地区：[1]黑龙江工程学院机电工程学院,哈尔滨150050

出　　处：《机械工程师》2012年第4期4-6,共3页Mechanical Engineer

基　　金：黑龙江省教育厅科学技术研究面上项目(11551387)

摘　　要：利用固相再生方法在挤压温度为450℃,挤压比分别为11.1:1、25:1和44.4:1的条件下,将ZM6镁合金屑制备成试样,然后进行微观组织观察和力学性能测试。结果表明:ZM6耐热镁合金在挤压过程中发生部分动态再结晶,挤压比越大,动态再结晶程度越大;合金的抗拉强度和延伸率随挤压比的增大而增大,当挤压比从11.1:1提高到44.4:1时,抗拉强度从204MPa提高到248MPa,延伸率从20.7%提高到27.5%。T6态合金的抗拉强度高于挤压态合金的抗拉强度,T6态合金的延伸率低于挤压态合金的延伸率。ZM6 magnesium alloy is prepared by hot extrusion of machined chips at 450℃,with extrusion ratio of 11.1：1、25：1 and 44.4：1,subsequently its microstructure and mechanical properties are investigated.The results indicate： the samples exhibit part dynamic recrystallization during hot extruding.The extrusion ratio is higher,the extent of dynamic recrystallization is a little larger.With the increase of extrusion ratio,the strength and elongation are improved.The heat treatment results in a significant increase in the tensile strength of the alloys,while the ductility is decrease in the extruded-T6 condition.

关 键 词：固相再生 ZM6镁合金 挤压比 组织 性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG376.2[金属学及工艺—金属材料]