研究了单级固溶及峰值时效处理对粉末热挤压法制备6061铝合金显微组织及室温力学性能的影响，观察了合金挤压态、固溶态及时效处理后的显微组织，并对其力学性能进行了测试。结果表明：挤压态材料的晶粒均匀细小，基体合金中存在大量的第二相颗粒，主要为Mg2 Si相；热挤压后的6061铝合金经固溶时效处理（530℃×1 h水冷＋170℃×6 h）后，晶粒内部析出大量的β″（Mg5Si6）相，并伴有少量棒状的β′（Mg2Si）相析出，拉伸强度和延伸率分别为311 MPa和10％，相比挤压态铝合金，其拉伸强度提高了近160％。
The effect of solid solution and peak aging on the microstructures and mechanical properties of the hot extruded 6061Al alloys made by powder was studied. The microstructures of as-extruded, solid solution and ageing treatments were investigated and the tensile properties were tested. The results showed that the fine and homogeneous grain structure was obtained in as-extruded Al alloys, and there were lots of precipitated phase particles ( Mg2 Si) in the matrix. After solution and ageing treatment ( 530 ℃× 1 h +170 ℃× 6 h ) , the constituents of matrix were composed of α-Al, strengthing phases β″-Mg5 Si6 and little amount of β′-Mg2 Si, tensile strength and elongation were 311 MPa and 10%, respectively. In contrast with as-extruded materials, the tensile strength of the heat treated 6061 alloys increased nearly by 160%.
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