航天用7050铝合金锻件热变形及热处理工艺  

Hot deformation and heat treatment process of 7050 aluminum alloy forgings for aerospace

作　　者：范曦 盛智勇 姜敖 倪珂 肖雨晴 赵永兴 Fan Xi;Sheng Zhiyong;Jiang Ao;Ni Ke;Xiao Yuqing;Zhao Yongxing(Hunan Inno China Advance Materials Co.,Ltd.,Yueyang Hunan 414009,China)

机构地区：[1]湖南中创空天新材料股份有限公司,湖南岳阳414009

出　　处：《金属热处理》2024年第4期214-219,共6页Heat Treatment of Metals

基　　金：湖南省十大技术攻关项目(2021GK1200)。

摘　　要：通过光学显微镜、透射电镜、室温拉伸以及电导率测试,研究了时效工艺及最终道次锻压变形量对7050铝合金锻件组织及性能的影响。结果表明,随着双级时效时间的增加,7050铝合金锻件的抗拉强度和屈服强度下降,电导率和伸长率增加。经过120℃×6 h+168℃×12 h的最佳时效工艺处理后,锻件性能满足新一代某型号7050铝合金锻件的性能要求。最终道次变形量对7050铝合金锻件的三向力学性能影响较大,在最佳的时效工艺下,最终道次变形量为45%时,可获得最优的综合性能,三向抗拉强度、屈服强度和伸长率均满足指标要求。Effects of aging process and final forging deformation on the microstructure and properties of 7050 aluminum alloy forgings were investigated by means of optical microscope,transmission electron microscope,tensile test at room temperature and electric conductivity tests.The results show that both the tensile strength and yield strength of the 7050 aluminum alloy forgings decrease with the increase of second aging time,but the electrical conductivity and elongation increase.The properties of forgings satisfy the requirements of the new generation 7050 aluminum alloy forgings after the optimal aging process at 120℃for 6 h and 168℃for 12 h.The final pass deformation has a significant effect on the three⁃dimensional properties of the 7050 aluminum alloy forgings.Under the optimal aging process,the best comprehensive properties can be obtained when the final pass deformation is 45%,and the three⁃dimensional tensile strength,yield strength and elongation meet the standard requirements.

关 键 词：锻压变形 时效处理 7050铝合金 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]