不同双级固溶热处理制度对7A09铝合金显微组织和性能的影响  

Effects of different two-stage solution heat treatment processes on microstructures and mechanical properties of 7A09 aluminum alloy

作　　者：张世兴[1] 邓鹏辉[1] 侯沿竹[1] 

机构地区：[1]河南工业大学机电工程学院,河南郑州450007

出　　处：《轻合金加工技术》2010年第10期43-46,共4页Light Alloy Fabrication Technology

基　　金：河南省河南工业大学科研基金资助项目(09XGG006)

摘　　要：通过拉伸试验、硬度测试、金相观察等手段试验研究了7A09铝合金双级固溶工艺制度(加热温度和保温时间)对其组织和性能的影响。结果表明,合适的双级固溶热处理可通过使可溶相充分固溶,减少再结晶程度,为后续热处理做组织上的准备;7A09铝合金的最佳双级固溶工艺参数是460℃40 min+500℃30 min,为工业生产7A09铝合金挤压材热处理工艺参数的确定及优化提供参考。The effect of two-stage solution heat treatments on microstructure and mechanical properties of 7A09 aluminum alloy was analyzed by metallographic observation,stretch and hardness testing.The result shows that the appropriate two-stage solution heat treatment can fully solubilize the soluble phase and reduce recrystallization level,so the subsequent heat treatment is prepared.The optimum two-stage solution heat treatment for 7A09 aluminum alloy is 460℃ with 40 min holding and 500℃ with 30 min holding.The reference technology system is being put forward for industrial production of 7A09 aluminum extrusions.

关 键 词：7A09铝合金 双级固溶处理 显微组织 硬度 

分 类 号：TG156.94[金属学及工艺—热处理]