固溶处理对7A09铝合金组织和力学性能的影响  

Effects of solid solution treatment on microstructure and mechanical properties of 7A09 aluminum alloy

作　　者：马冬威[1] 王敏[1] 胡志华[1] 

机构地区：[1]湖北汽车工业学院材料工程系,湖北十堰442002

出　　处：《金属热处理》2014年第1期38-41,共4页Heat Treatment of Metals

基　　金：国家自然科学基金(51205116);材料成形与模具技术国家重点实验室开放基金(2012-P12)

摘　　要：通过显微组织观察和力学性能测试等方法研究了固溶处理对7A09铝合金显微组织和力学性能的影响。结果表明，在723～783K范围内，随固溶温度升高和固溶时间延长，合金中可溶析出相粒子逐渐溶解，合金强度逐渐升高；进一步提高固溶温度和延长固溶时间，合金内部晶粒开始粗化，合金强度下降。7A09铝合金的最佳固溶处理工艺为743K×55min。The effects of solid solution on microstructure and mechanical properties of 7A09 aluminum alloy were investigated by means of microstructure observation and mechanical property test. The results show that the tensile strength of the alloy increases along with the increasing of solution temperature and solution time in the range of 723-783 K, meanwhile, the precipitation phase particles dissolve gradually. The tensile strength of the alloy reduces when solution temperature or solution time further increases and the grains become coarse. The optimum solution treatment process of 7A09 aluminum alloy is at 743 K for 55 min.

关 键 词：7A09铝合金 固溶处理 显微组织 力学性能 

分 类 号：TG164.2[金属学及工艺—热处理]