在轧制温度603～703 K、轧制压下量20％～40％、应变速率4～16 s-1下对AZ31镁合金进行轧制变形,研究轧制压下量、应变速率和变形温度对AZ31镁合金变形组织的影响,分析了镁合金的动态再结晶机制.结果表明:应变速率和变形温度不仪影响动态再结晶进行的程度,而且能够改变再结晶的方式或形核机制.当轧制应变速率(ε)=13.9 s-1,变形温度T=603 K时,再结晶方式为孪生动态再结晶；变形温度升高到703 K时,沿晶界有链状新晶粒出现.当变形温度T=673 K,应变速率(ε)=11,35 s-1时,再结晶方式以孪生动态再结晶为主；应变速率降低到(ε)=4s-1时,再结晶方式以旋转动态再结晶为主.
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