通过对均匀化退火后的AZ91镁合金热挤压以及随后的时效处理,分析了形变及时效过程对材料组织与性能的影响.结果表明:AZ91镁合金在320和380 ℃挤压时发生了动态再结晶,组织比铸态细化,力学性能大幅度提高;随后的时效处理进一步提高了挤压镁合金的力学性能.经380℃挤压及200℃,10 h的时效处理后,其抗拉强度σb可达357 MPa,延伸率δ达到8%.
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