冷热循环处理对7050铝合金力学性能和尺寸稳定性的影响  

Effect of cold and heat cycle treatment on mechanical properties and dimensional stability of 7050 aluminum alloy

作　　者：刘立彬[1] 王浩军[2] 胡生双 欧阳德来[3] Liu Libin;Wang Haojun;Hu Shengshuang;Ouyang Delai(The Military Representative Office of the People's Liberation Army in XAC, Xi'an Shaanxi 710089 , China;Avic Xi'an Aircraft Industry(group) Companyltd, Xi'an Shaanxi 710089,China;School of Material Science and Engineering,Nanchang Hangkong University, Nanchang Jiangxi 330063, China)

机构地区：[1]中国人民解放军驻西飞公司军事代表室,陕西西安710089 [2]航空工业西安飞机工业(集团)有限责任公司,陕西西安710089 [3]南昌航空大学材料科学与工程学院,江西南昌330063

出　　处：《金属热处理》2019年第3期149-152,共4页Heat Treatment of Metals

摘　　要：对7050铝合金进行了冷热循环处理,研究了冷热循环处理对该合金力学性能和尺寸稳定性的影响。结果表明:冷热循环处理对7050铝合金力学性能的影响较小;从提高尺寸稳定性方面考虑,最佳的冷热循环处理工艺为-150℃保温24 h,再加热至150℃保温3 h,并循环2次;对该工艺处理后圆环开口尺寸变化率由未冷热循环处理的0. 22%降低到0. 05%,降低了77. 3%。Effect of cold and hot cycle treatment on mechanical properties and dimensional stability of 7050 aluminum alloy was studied. The results show that the cold and hot cycle treatment has little effect on the mechanical properties of 7050 aluminum alloy. Considering to improve the dimensional stability,the best cold and hot cycle process is holding at -150 ℃ for 24 h and then heating to 150 ℃ for 3 h,circulation 2 times. The change rate of the opening size of the ring decreases from 0. 22% to 0. 05%,and decreased by 77. 3%,respectively.

关 键 词：7050铝合金 冷热循环处理 力学性能 尺寸稳定性 

分 类 号：TG146.2[一般工业技术—材料科学与工程]