中文摘要：

在Mg-Zn系合金中加入Si元素，以提高ZK系合金的耐高温性能，并通过等通道转角挤压细化粗大汉字状的Mg2Si相，改变微观组织，降低其对合金组织的割裂作用，提高合金室温力学性能。经过4道次挤压以后，合金的屈服强度提高到96 MPa，抗拉强度升高到294 MPa，伸长率升高到28.6%。

英文摘要：

The paper studies that adding Si into Mg-Zn series alloys for improving the resistant high temperature performance of ZK series alloys. And we through the Equal Channel Angular Pressing change the Chinese script type Mg2Si phase, which can reduce the effect that the Mg2Si phase can split alloy organization. ECAP can change the microstructure to improve room temperature mechanical properties .After 4 passes by ECAP ,the yield strength of the ZS32 alloy is increased to 96 MPa. And the tensile strength is increased to 294 MPa. Besides the elongation has been increased to 28.6%.