固溶时效对挤压态AM60镁合金显微组织与硬度的影响  

Effects of Solid Solution and Aging treatment on Microstructure and Hardness of Extruded AM60 Magnesium Alloy

作　　者：陈阳[1] 吴震[1] 王金辉[1] 

机构地区：[1]青海大学机械工程学院,青海西宁810016

出　　处：《铸造技术》2015年第9期2233-2236,共4页Foundry Technology

摘　　要：以挤压态AM60镁合金为对象,研究了固溶时效处理对合金显微组织和硬度的影响。结果表明,固溶处理5 h后,呈网状连续分布在晶界处的Mg17Al12基本全部溶入α-Mg基体中,时效处理后再以颗粒的形式重新析出并弥散分布在晶粒内部。固溶处理后,AM60镁合金的硬度有所下降,固溶7 h时硬度达到最低值71 HBS。随着时效时间的延长,合金的硬度先升高后降低,时效处理3 h时硬度达到最大值。The effect of solid solution and aging treatment on microstructure and hardness of extruded AM60 magnesium alloy were studied. The results show that almost all the MglTA112 distribute in α-Mg matrix after solution treatment for 5 h, and after aging, it disperse in the grain interior again. The hardness of AM60 magnesium alloy decrease, and the minimum value is 71 HBS after solution treatment at 415 ℃ for 7 h. The hardness increase first and then decrease with the increase of aging times, and the value reach to maximum when the aging time is 3 h.

关 键 词：AM60镁合金 固溶时效处理 微观组织 硬度 

分 类 号：TG156.94[金属学及工艺—热处理] TG146.22[金属学及工艺—金属学]