| 引用本文: | 马国俊,丁雨田,金培鹏,刘国龙.热处理对粉末热挤压法制备6061铝合金强度和塑性的影响[J].材料科学与工艺,2014,22(4):101-107.DOI:10.11951/j.issn.1005-0299.20140418. |
| MA Guojun,DING Yutian,JIN Peipeng,LIU Guolong1 .Effect of heat treatment on strength and ductility of 6061Al alloys by hot extrusion of powder[J].Materials Science and Technology,2014,22(4):101-107.DOI:10.11951/j.issn.1005-0299.20140418. |
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| 摘要: |
| 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Mg2Si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%. |
| 关键词: 6061铝合金 热挤压 热处理 力学性能 |
| DOI：10.11951/j.issn.1005-0299.20140418 |
| 分类号:TG146.2+ 1 |
| 基金项目:青海省科技厅项目 (2010-H-803)； 国家重点基础研究发展计划项目 (2011CB612200)； |
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| Effect of heat treatment on strength and ductility of 6061Al alloys by hot extrusion of powder |
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MA Guojun1,2, DING Yutian1, JIN Peipeng2, LIU Guolong1
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(1.State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China; 2.Institute of Metal Materials, Qinghai University, Xining 810016, China)
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| Abstract: |
| 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 (Mg2Si) 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″-Mg5Si6 and little amount of β′-Mg2Si, 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%. |
| Key words: 6061Al alloys hot extrusion heat treatment mechanical properties |
