研究了不同热处理工艺下,Zn-22Al基合金挤压管材的显微组织和室温力学性能。结果表明,挤压管在室温下为α+η两相组织,超塑性处理后呈现细小等轴晶,晶粒内部存在具有一定取向的小颗粒。200℃保温9 h退火处理后,挤压管材硬度为62.52HV0.05,伸长率为27.20%,抗拉强度为233 MPa。320℃×6 h淬火+250℃×0.5 h回火处理后,挤压管材硬度为41.03 HV0.05,伸长率达到139.47%,抗拉强度为98 MPa。 The microstructure and room temperature mechanical properties of Zn-22Al alloy extruded tubes under different heat treatment processes were studied. The results show that the extruded tube is α + η two-phase microstructure at room temperature, showing fine equiaxed grains after the superplastic treatment, and there are small particles with certain orientations inside the grains. After annealing at 200 ℃ for 9 h, the hardness of extruded pipe was 62.52HV0.05, the elongation was 27.20% and the tensile strength was 233 MPa. 320 ℃ × 6 h quenching + 250 ℃ × 0.5 h after tempering, extrusion pipe hardness 41.03 HV0.05, elongation of 139.47%, tensile strength of 98 MPa.