研究均匀化、挤压以及热处理对Mg-5.77％Zn-0.94％Mn(ZM61)(质量分数)镁合金显微组织和力学性能的影响.结果表明:ZM61铸态组织呈枝晶结构,枝晶间网状的和枝晶内颗粒状的金属间化合物为Mg7Zn3;经(330℃,8 h)+(420℃,2 h)的两级均匀化处理后,化合物绝大部分溶解于基体；两级均匀化处理可大幅降低合金的挤压温度(降低幅度30℃)、减少挤压态组织中的残余流线、提高挤压态合金的伸长率、缩短固溶时间,但并未明显细化挤压态合金的晶粒;对于可时效强化的ZM61变形镁合金来说,晶粒大小对其力学性能的影响不大,起主要强化作用的是时效析出相的类型、尺寸和弥散程度；ZM61在时效过程中主要析出沿[0001 ]α-Mg的β'1杆状相和平行于(0001)α-Mg的β'2盘状相的析出相,其中β'1杆状相为起主要强化作用的析出相.
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