为了研究ZK60镁合金的热变形行为,采用Gleebe-1500热模拟机在变形温度为423～673 K、应变速率为0.001～10s-1条件下对合金进行的热压缩试验,分析合金流变应力与应变速率、变形温度之间的关系,通过引入Z参数建立合金流变应力本构方程,并观察合金变形过程中的显微组织演变.结果表明:变形温度低于473 K且应变速率大干0.1 s-1时试样发生宏观开裂;在变形温度较高和应变速率较低时,合金真应力-真应变曲线具有动态再结晶特征,随变形温度升高和应变速率的降低流变应力减小,热压缩后的组织中再结晶现象越明显;应变速率越高,再结晶晶粒越细小.
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