热处理对Mg-Zn-Y合金显微组织和显微硬度的影响  

Effects of Heat Treatment on Microstructure and Micro-Hardness of Mg-Zn-Y Alloys

作　　者：熊汉青[1] 王志峰[1] 赵维民[1] 安杨[1] 王子臣[1] 

机构地区：[1]河北工业大学,天津300130

出　　处：《中国铸造装备与技术》2012年第6期13-15,共3页China Foundry Machinery & Technology

基　　金：河北省自然科学基金(E2010000057)资助项目

摘　　要：本文采用铜模铸造方法制备出的Mg-Zn-Y合金,对所制试样进行两种不同工艺的热处理,并研究热处理对该合金的微观组织和显微硬度的影响。研究发现T6(420℃×24h+150℃)态和高温退火(550℃×2h)态的合金晶粒中分散着一些小的颗粒相,T6态的絮状组织发生分离、显微硬度降低,而高温退火态合金的显微硬度却有一定程度的升高。Mg-Zn-Y alloys have been prepared by copper mold casting method. Two kinds of heat treatment have been carried out subsequently. The effects of heat treatments on microstructure and micro-hardness of the specimens have been investigated. The results showed that an array of particles dispersed in the specimens after T6 （420℃×24h＋150℃） and high heat anneal heat treatment. Meanwhile, cotton-shaped structures separated into two kinds of microstructures. The micro-hardness of the alloy decreased after T6 treatment. It had also a few particles in the microstructure after high temperature annealing （550℃×2h）. The micro-hardness of the specimen increased after the high temperature annealing.

关 键 词：MG-ZN-Y合金 准晶 热处理 微观组织 显微硬度 

分 类 号：TG166.4[金属学及工艺—热处理]