固溶制度对1933铝合金自由锻件组织和力学性能的影响  

Effects of solution treatment on microstructure and mechanical properties of 1933 aluminum alloy forgings

作　　者：张新明[1,2] 欧军[1,2] 刘胜胆[1,2] 徐敏[1,2] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]中南大学有色金属材料科学与工程教育部重点实验室,长沙410083

出　　处：《中国有色金属学报》2010年第1期30-36,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展计划资助项目(2005CB623700)

摘　　要：采用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)、X射线衍射和室温拉伸研究固溶制度对1933铝合金自由锻件组织和力学性能的影响。结果表明:由于Al3Zr粒子对晶界的钉扎作用,在470℃以下固溶时,合金的再结晶程度很低(<15%);随着固溶温度升高,再结晶程度逐渐上升;510℃固溶时,合金的再结晶程度显著增大(约为48%);1933铝合金锻件中第二相主要有Al7Cu2Fe相和η相;合金经470℃固溶60min后,η相溶解比较充分,此后随温度升高或时间延长第二相变化不大;合金的最佳固溶制度为470℃、60min,在此条件下合金具有最好的力学性能。The effects of solution treatment on microstructures and properties of the aged 1933 aluminum alloy forgings were investigate by optical microscopy （OM）, scanning electron microscopy （SEM）, transmission electrical microscopy （TEM）, X-ray diffractometry and tensile testing. The results show that the recrystallization fraction is very low （〈 15%） when the temperature is below 470 ℃ due to the pinning effect on grain boundaries of Al3Zr dispersoids. When the forgings are treated at 510℃, the recrystallization fraction increases significantly to about 48%. The main phases in this alloy are A17Cu2Fe and η phases. The second phases don＇t change obviously with increasing temperature and time because the η phase is dissolved almost completely after solution treatment at 470℃ for 60 min. The best solution treatment for 1933 alloy forgings is 470℃, 60 min, and the alloys under these conditions have the best tensile properties.

关 键 词：1933铝合金 固溶 再结晶 第二相 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]