Mg-3Zn-Mn合金均匀化处理工艺研究  

Research of Homogenization Treatment Process on As-cast Mg-3Zn-Mn Alloy

作　　者：尹冬松[1] 张二林[2] 曾松岩[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001 [2]中国科学院金属研究所,辽宁沈阳110016

出　　处：《铸造技术》2008年第12期1647-1650,共4页Foundry Technology

摘　　要：利用差式扫描量热仪(DSC)、金相显微镜(OM)、扫描电镜(SEM)和显微硬度测试仪,研究了均匀化处理对铸态Mg-3Zn-Mn合金微观组织/显微硬度的影响。结果表明,铸态Mg-3Zn-Mn合金基体上存在一定程度的微观偏析,且均匀分布Mg-Zn相和Al-Mn相。在335℃均匀化处理时,前15 h,合金的微观偏析随均匀化时间增加而逐渐减轻,显微硬度明显降低;15 h后,Mg-3Zn-Mn合金基体上的微观偏析消失,MgZn相也溶入基体,Mg-3Zn-Mn合金的显微硬度变化不大。The effect of the homogenization treatment on microstructure and microhardness of as-cast Mg-3Zn-Mn alloy was investigated by means of DSC, OM, SEM and micro hardness tester. The results show that there is some microsegregation in matrix of as cast Mg-Mn-3Zn alloy and Mg-Zn phase and Al-Mn phase are distributed uniformly. Microsegregation of the alloy decreases gradually with increasing homogenization treatment time and micro hardness decreases obviously during the initial period of 15 h; Microsegregation of the alloy disappears, Mg-Zn phase is dissolved into the matrix and microhardness has almost no change by the homogenization treatment after 15 hat 335℃.

关 键 词：镁合金 均匀化处理 微观组织 显微硬度 

分 类 号：TG146.22[一般工业技术—材料科学与工程]