| 粉末热挤压Al-Zn-Mg-Cu系合金的热处理工艺 |
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| 引用本文： | 王少卿,于化顺,张振亚,王海涛,闵光辉.粉末热挤压Al-Zn-Mg-Cu系合金的热处理工艺[J].材料热处理学报,2009,30(6). |
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| 作者姓名： | 王少卿 于化顺 张振亚 王海涛 闵光辉 |
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| 作者单位： | 山东大学材料液固结构演变与加工教育部重点实验室,济南,250061 |
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| 基金项目： | 山东省重点科技攻关项目 |
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| 摘 要： | 通过XRD衍射分析、光学和透射电镜观察以及力学性能测试,研究了固溶和时效处理对粉末热挤压法制备的Al-Zn-Mg-Cu高强铝合金组织性能的影响.结果表明:挤压态合金中析出大量MgZn_2相;合金适宜的T6热处理制度为460℃×2.5h水冷+120℃×24h空冷;在此条件下合金的抗拉强度、屈服强度和伸长率分别为731MPa、670MPa和6.2%;晶粒细化是合金T6组织与铸锭挤压Al-Zn-Mg-Cu合金回归再时效(RRA)组织类似的主要原因.
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| 关 键 词： | 粉末热挤压 Al-Zn-Mg-Cu合金 微观组织 力学性能 |
Heat treatment process of Al-Zn-Mg-Cn alloy fabricated by powder hot extrusion technology |
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| WANG Shao-qing,YU Hua-shun,ZHANG Zhen-ya,WANG Hai-tao,MIN Guang-hui.Heat treatment process of Al-Zn-Mg-Cn alloy fabricated by powder hot extrusion technology[J].Transactions of Materials and Heat Treatment,2009,30(6). |
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| Authors: | WANG Shao-qing YU Hua-shun ZHANG Zhen-ya WANG Hai-tao MIN Guang-hui |
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| Abstract: | The effects of solution treatment and aging process on microstructure and mechanical properties of powder hot extruded Al-Zn-Mg-Cu alloy were investigated by X-ray diffractometer, optical and transmission electron microscope, microhardness and tensile tests. The result shows that a large number of MgZn_2 particles were precipitated from A1 matrix during extrusion. The optimal T6 treatment process of the alloy is 460℃×2.5h + 120℃× 24h. Tensile strength, yield strength and elongation of the T6 treated aUoy are 731MPa, 670MPa and 6.2%, respectively.The reason that the microstructure of T6 treated alloy is similar to that of cast and then extruded Al-Zn-Mg-Cu alloy after retrogression and reaging(RRA) is maiuly attributed to grain refinement. |
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| Keywords: | powder hot extrusion Al-Zn-Mg-Cu aluminum alloy microstructure mechanical property |
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