固溶处理对7B04铝合金冷轧板组织性能的影响  

Effect of solution treatment on microstructure and properties of cold rolling 7B04 aluminum alloy sheet

作　　者：李民[1] 李云[2] 徐玉国[1] 王佃刚[3] Li Min;Li Yun;Xu Yuguo;Wang Diangang(College of Engineering,Yantai Nanshan University,Longkou Shandong 265713,China;Institute of Science and Technology,Shandong Radio and TV University,Jinan Shandong 250010,China;School of Materials Science and Engineering,Shandong University,Jinan Shandong 250100,China)

机构地区：[1]烟台南山学院工学院,山东龙口265713 [2]山东广播电视大学理工学院,山东济南250010 [3]山东大学材料科学与工程学院,山东济南250100

出　　处：《金属热处理》2020年第9期105-110,共6页Heat Treatment of Metals

基　　金：山东省重点研发项目(2017GGX20130,2017CXGC0402);山东省高等学校科技计划项目(J18KB046);山东省自然科学基金(ZR2017MEM009)。

摘　　要：在实验室中制备了试验用7B04铝合金,经铸造-均质化退火-热轧-中间退火-冷轧后制得7B04铝合金板材,并对合金板材进行了后续固溶时效处理,研究了固溶处理对其组织和性能的影响。结果表明,470℃×1 h固溶+120℃×21 h时效处理铝合金冷轧板材再结晶明显,有少量晶粒处于伸长状态,除粗大第二相粒子外,未发现细小第二相粒子,综合力学性能较好,抗拉强度为596MPa,屈服强度为537 MPa,伸长率为14.88%。固溶温度达到480℃时,合金再结晶明显,但保温时间不能超过0.5 h,否则合金强度和塑性下降。7B04 aluminum alloy were prepared in the laboratory,which was further prepared into 7B04 aluminum alloy sheets by casting+homogenization annealing+hot rolling+intermediate annealing+cold rolling process,then the effect of solid solution treatment on the microstructure and properties of the alloy sheet was studied.The results show that the recrystallization of cold rolling aluminum alloy sheet treated by solution treatment at 470℃ for 1 h and aged at 120℃ for 21 h is obvious,though a small amount of grains are in elongated state,and except for the coarse secondary phase particles,no small secondary phase particles are found.The comprehensive mechanical properties are good,the tensile strength is 596 MPa,the yield strength is 537 MPa,and the elongation is 14.88%.When the solution treatment temperature reaches 480℃,the alloy recrystallizes obviously,but the holding time should not exceed 0.5 h,otherwise the strength and plasticity of the cold rolling alloy sheet will be decreased.

关 键 词：7B04铝合金 冷轧板 固溶处理 时效处理 微观组织 性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]