2050铝锂合金形变热处理工艺
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摘要
为获得较优的2050铝锂合金形变热处理工艺,本文采用正交试验和极差分析探究固溶温度、预变形量、时效温度与时效时间对合金力学性能和组织的影响。通过TEM、金相分析不同工艺下材料的微观结构,探究其与力学性能间的影响关系。结果表明,固溶温度525℃,预变形量12%,时效温度160℃,时效时间48 h的工艺参数能够获得较优综合力学性能。
In order to get better thermo-mechanical treatment process of 2050 Al-Li alloy, the orthogonal experiment and range analysis were used to investigate the mechanical properties and structure of 2050 Al-Li alloy under different solution temperature, pre-deformation, aging temperature and aging time. The microstructure of materials under different processes was analyzed by TEM and metallography, and the relationship between the microstructure and mechanical properties was explored. The results show that selecting technological parameters of 525℃ solution temperature, 12% pre-deformation, 160℃ aging temperature and 48 h aging time can obtain better comprehensive mechanical properties.
In order to get better thermo-mechanical treatment process of 2050 Al-Li alloy, the orthogonal experiment and range analysis were used to investigate the mechanical properties and structure of 2050 Al-Li alloy under different solution temperature, pre-deformation, aging temperature and aging time. The microstructure of materials under different processes was analyzed by TEM and metallography, and the relationship between the microstructure and mechanical properties was explored. The results show that selecting technological parameters of 525℃ solution temperature, 12% pre-deformation, 160℃ aging temperature and 48 h aging time can obtain better comprehensive mechanical properties.
引文
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[2]尹登峰.铝锂合金研究开发的历史与现状[J].材料导报,2003,17(2):18-20.
[3]邱惠中.铝锂合金的发展概况及其应用[J].宇航材料工艺,1993(4):38-45.
[4]刘斌.铝锂合金的发展与应用[J].现代机械,2001(4):71-75.
[5] ZHANG S F,ZENG W D,YANG W H,et al.Ageing response of a Al-Cu-Li 2198 alloy[J].Mater.&Des.,2014,63:368-374.
[6]贾连锁.稀土元素Ce和预变形对Al-Li-Cu-Mg-Zr合金时效相变过程的影响[J].稀有金属材料与工程,2002,4(2):156-159.
[7]蒋呐.CP276铝锂合金的应变时效工艺[J].中国有色金属学报,1999,12(4):694-699..
[8]刘斯仁.预变形对CP276型Al-Li合金拉伸性能的影响[J].稀有金属,1997,7(4):311-314.
[9] DASHAN SUI. Application of orthogonal experimental design and tikhonov regularization method for the identification of parameters in the casting solidification process[J]. Acta Metallurgica Sinica,2009,22(1):13-21.
[10]孙海霞.基于ABAQUS和正交试验法的基坑支护桩优化[J].沈阳工业大学学报,2016,38(4):457-460.