STUDYING ABOUT OPTIMIZATION OF AGING PROCESS FOR HIGH STRENGTH COPPER ALLOY

Abstract

This work presents the results of optimizing the aging process of Cu-9Ni-3Sn alloy to achieve high strength and ductility. By regression analysis, the experimental results showed that the optimal aging treatment was 354^oC for 2.5 hours, the alloy achieved tensile strength value of 1032.8Mpa and elongation of 8.39% with the difference from the model is less than 10%. By the results of optical microstructure the changing of structure’s this alloy before and after aging are explained; the cause of the increase in strength and ductility of the alloy is analyzed thanks to the mechanism of creating small grains and having defect of crystal structure.