固溶处理对2A14铝合金冷轧板组织与性能的影响  

Effects of Solid Solution Treatment on Microstructure and Mechanical Properties of 2A14 Aluminum Alloy Cold Rolled Sheet

作　　者：王华春[1] 黄淑萍[1] 何克准[1] 张航[1] 黄飞 Wang Huachun;Huang Shuping;He Kezhun;Zhang Hang;Huang Fei(Key Laboratory of Materials and Processes of Aluminum Alloys,Alnan Aluminum Inc.)

机构地区：[1]广西南南铝加工有限公司广西铝合金材料与加工重点实验室,南宁530031

出　　处：《特种铸造及有色合金》2020年第7期731-734,共4页Special Casting & Nonferrous Alloys

基　　金：广西创新驱动发展专项资助项目(桂科AA17202007,桂科AA17204012)。

摘　　要：采用DSC差热分析、拉伸试验、硬度测试及金相观察等方法,分析了固溶处理对2A14铝合金冷轧板材显微组织与力学性能的影响。结果表明,2A14铝合金冷轧薄板的过烧温度为508℃。随固溶温度升高和保温时间延长,合金的固溶程度增大,经自然时效后,合金强度逐渐提高,在505℃下固溶30min时合金强度最高。而随着固溶温度进一步升高,合金发生再结晶且晶粒长大,沉淀强化减弱,因而强度降低。综合得到2A14铝合金冷轧板的最佳固溶处理制度为505℃下保温30min。The influences of solid solution treatment on microstructure and mechanical properties of 2A14 aluminum alloy cold-rolled sheet were investigated by DSC,tensile testing,hardness testing and microstructure observation.The results reveal that the overheated temperature of 2A14 alloy cold rolled sheet is 508℃.With the increase of solid solution temperature and holding time,the degree of solid solution of the alloy is increased.After natural aging,the strength of 2A14 alloy sheet is gradually increased.With the solid solution treatment at 505℃ for 30 min,the strength of 2A14 alloy reaches the maximum value.However,with the further increase of the solid solution temperature,the recrystallization of alloy can be observed with the grain size coarsened,and the precipitation-strengthening is weakened,threrfore the strength of 2A14 alloy is reduced.In conclusion,the ideal solution treatment for 2A14 aluminum alloy sheet is heat presevation for 30 min at 505℃.

关 键 词：2A14铝合金 固溶处理 显微组织 力学性能 

分 类 号：TG166.4[金属学及工艺—热处理] TG146.21[金属学及工艺—金属学]