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| 热挤压对7055铝合金力学性能及组织的影响 | |
| 引用本文： | 张新,陈利华,王长顺,毕泗元,李宏伟,王思涛,隋国生. 热挤压对7055铝合金力学性能及组织的影响[J]. 特种铸造及有色合金, 2009, 29(12). DOI: 10.3870/tzzz.2009.12.007 |
| 作者姓名： | 张新 陈利华 王长顺 毕泗元 李宏伟 王思涛 隋国生 |
| 作者单位： | 1. 北京北方车辆集团有限公司工艺研究所;北京有色金属研究总院有色金属材料制备加工国家重点实验室 2. 北京北方车辆集团有限公司工艺研究所 3. 北京北方车辆集团有限公司铸造分公司 |
| 摘 要： | 采用挤压铸造成形工艺制备7055高强铝合金,研究了热挤压参数对合金力学性能及微观组织的影响,并与铸态下的力学性能及微观组织进行了对比.结果表明,热挤压态下的7055铝合金的微观组织和力学性能均优于铸态,并且晶粒随着比压的增加趋于细化,抗拉强度随着比压的增加趋于提高.当比压为75 MPa时,在730 ℃温度下进行挤压浇注,经过双级固溶处理和时效后,合金的晶粒明显细化,抗拉强度达到681.4 MPa,伸长率达到7.14%. |
| 关 键 词： | 7055铝合金 热挤压 力学性能 微观组织 |
Effects of Hot Extrusion on Microstructure and Mechanical Properties of 7055 Aluminum Alloy |
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| Zhang Xin,Chen Lihua,Wang Changshun,Bi Siyuan,Li Hongwei,Wang Sitao,Sui Guosheng. Effects of Hot Extrusion on Microstructure and Mechanical Properties of 7055 Aluminum Alloy[J]. Special Casting & Nonferrous Alloys, 2009, 29(12). DOI: 10.3870/tzzz.2009.12.007 | |
| Authors: | Zhang Xin Chen Lihua Wang Changshun Bi Siyuan Li Hongwei Wang Sitao Sui Guosheng |
| Abstract: | Effects of hot extrusion parameters on mechanical properties and microstructure of the 7055 alloy were investigated by tensile testing and microstructural observation, and they are compared with those of as-cast ones. The results reveal that microstructure and mechanical properties of the hot extruded 7055 aluminum alloy are obviously superior to those of as-cast ones. Meanwhile, with increasing in specific pressure, grain size in the microstructure of the alloy is increasingly refined, and tensile strength is gradually improved. With extrusion casting at 730℃ and 75MPa, the grain size in the alloy after T6 heat treatment is refined obviously with tensile strength of 681.4MPa and elongation of 7.14%. |
| Keywords: | 7055 Aluminum Alloy Hot Extrusion Mechanical Properties Microstructure |
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