退火工艺对2024铝合金性能和化铣表面质量的影响  

Effect of annealing process on mechanical properties and chemical milling surface of 2024 aluminum alloy

作　　者：黄淑萍[1] 何克准[1] 胡海辉 韦修勋 Huang Shuping;He Kezhun;Hu Haihui;Wei Xiuxun(Alnan Aluminum Inc.,Nanning Guangxi 530031,China;The PLA 95034 Troops,Baise Guangxi 533600,China)

机构地区：[1]广西南南铝加工有限公司,广西南宁530031 [2]中国人民解放军95034部队,广西百色533600

出　　处：《金属热处理》2018年第8期170-173,共4页Heat Treatment of Metals

基　　金：国家国际科技合作专项项目(2014DFA50210)

摘　　要：采用力学性能测试、表面粗糙度检测以及金相观察等方法,研究了退火工艺对2024铝合金力学性能和化铣后表面质量的影响。结果表明：随退火温度的升高和保温时间的延长,2024铝合金板材组织经历回复、再结晶及晶粒长大3个阶段,板材强度先减小后增大,伸长率先增大后减小,化铣后板材表面粗糙度亦先减小后增大。综合得到2024铝合金板材最佳退火制度为380℃保温3 h。Effect of annealing process on mechanical properties and surface quality after chemical milling of 2024 aluminum sheet was studied with methods of tensile test,roughness test and microstructure observation. The results showed that with the increase of annealing temperature and the soaking time,the 2024 sheet structures undergo recovery,recrystallization and grain growth three stages; the strength of 2024 aluminum decreases initially but then increases and the elongation increases initially but then decreases; the surface roughness of 2024 aluminum plate after chemical milling decreases initially but then increases. In conclusion,the comparatively ideal annealing treatment for2024 alloy sheet is 380 ℃ for 3 h.

关 键 词：2024铝合金 退火工艺 拉伸 化铣 表面粗糙度 

分 类 号：TG166.3[金属学及工艺—热处理]