Effect of solution treatment on microstructure and properties of cold rolling7B04 aluminum alloy sheet

doi:10.13251/j.issn.0254-6051.2020.09.019

Abstract

Abstract: 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.

Key words: 7B04 aluminum alloy, cold rolling sheet, solution treatment, aging treatment, microstructure, properties

CLC Number:

TG146.21

Li Min, Li Yun, Xu Yuguo, Wang Diangang. Effect of solution treatment on microstructure and properties of cold rolling7B04 aluminum alloy sheet[J]. Heat Treatment of Metals, 2020, 45(9): 105-110.

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