摘要
通过OM,SEM,DSC差热分析和室温拉伸性能测试,研究了单级固溶处理对7136铝合金挤压板带组织和力学性能的影响。结果表明:合金固溶处理温度越高,时间越长,粗大第二相溶解越多;合金在480℃进行固溶处理时,出现过烧组织特征。随着固溶时间的延长,呈现出晶粒粗化和再结晶组织比例增加的趋势。本合金适宜的单级固溶制度为470℃/4h,再经(120℃/24 h)峰时效处理后,合金抗拉强度、屈服强度和伸长率分别为698 MPa,47MPa和12.8%。
The effects of solution treatment on the microstructures and mechanical properties of 7136 aluminum alloy extrusion plate were studied by OM,SEM,DSC and room temperature tensile test. The results show that the higher the solution temperature and longer time, the more coarse second phase dissolved. The overheated structure appears in the alloys when the quenching temperature is at 480℃. The trend of microstructure coarsening and recrystallization appears when prolongating the solution time is extended. The suited solution of the alloy is single-stage solution of 470℃ ,4 h. After tensile strength,yield strength and elongation are 698 MPa,647 solution and peak aging of （470℃ ,4 h） ＋ （120℃ ,24 h） ,the ultimate MPa and 12.8% ,respectively.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2012年第5期37-42,共6页
Journal of Aeronautical Materials
基金
国家自然科学基金项目(50904010)
国际科技合作项目(2010DFB50340)
关键词
7136铝合金
固溶处理
显微组织
力学性能
7136 aluminum alloy
solution treatment
microstructure
mechanical properties
