2050铝锂合金形变热处理工艺

Thermo-Mechanical Treatment Process of 2050 Al-Li Alloy

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.