摘要
采用SEM分析、导电率测试、室温拉伸性能测试等方法,研究了双级固溶工艺对7050铝合金组织演变,以及对双级时效后析出相特征与力学性能的影响。结果表明,与单级固溶处理相比,双级固溶可使难溶的Al_(2)CuMg相完全固溶,显著增加晶内时效析出相的数量,晶界析出相断续分布。双级固溶处理显著提高了7050铝合金的拉伸强度和导电率,同时保持较好的伸长率,抗拉强度达到611.9 MPa,屈服强度达到587.5 MPa,导电率为42.43%IACS,而伸长率为13.5%。
Effect of two-step solution process on microstructure evolution of the 7050 aluminum alloy and precipitate characteristics and mechanical properties after two-step aging was tudied by means of SEM analysis,electrical conductivity testing and room temperature tensile performance testing.The results show that compared with the single stage solution,two-step solution can completely dissolve the insoluble Al_(2)CuMg phase,significantly increase the number of aging precipitates within grains,and the precipitates on the grain boundary are distributed intermittently.The two-step solution treatment significantly increases tensile strength and conductivity of the 7050 aluminum alloy while maintaining better elongation,with 611.9 MPa of the tensile strength,587.5 MPa of the yield strength,42.43%IACS of the electrical conductivity,and 13.5% of the elongation.
作者
姜中涛
汪鑫
周志明
林海涛
杨绪盛
代芳芳
Jiang Zhongtao;Wang Xin;Zhou Zhiming;Lin Haitao;Yang Xusheng;Dai Fangfang(Research Institute for New Materials Technology,Chongqing University of Arts and Sciences,Chongqing 402160,China;College of Materials Science and Engineering,Chongqing University of Technology,Chongqing 400054,China;Southwest Aluminum(Group)Co.,Ltd.,Chongqing 401326,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2022年第3期102-106,共5页
Heat Treatment of Metals
基金
重庆市技术创新与应用发展重点专项(CSTC2019jscx-mbdxX0025)。
关键词
7050铝合金
强化固溶
双级时效
组织
力学性能
7050 aluminum alloy
enhanced solution
two-step aging
microstructure
mechanical properties
作者简介
姜中涛(1984-),男,副教授,博士,主要研究方向为轻合金材料设计与组织性能,E-mail:jiangtao6364@163.com。
