C5240 铜合金加工过程的组织演变与力学性能

通过摸索配料和铸造工艺，制备高强高弹 C5240 铸坯，并进一步通过金相组织观察和能谱分析研究电磁搅拌对 C5240 合金及 Sn 元素分布的影响规律。结果发现，施加电磁搅拌对 C5240 铸坯沿着厚度方向 Sn含量分布均匀化改善有着明显的影响 ；此外，中间退火对屈服强度和抗拉强度影响不大，但有效改善断裂延伸率，且有助于后续加工 ；在薄带轧制过程中，电导率没有随轧制道次增加而降低，这说明位错对电导率的降低作用没有固溶原子大。

Organizational Evolution and Mechanical Properties of C5240 Copper Alloy Processing Process

In this paper, C5240 billets with high strength and high elasticity were prepared by exploring the batching and casting process. The effect of electromagnetic stirring on the distribution of Sn element in C5240 alloy was further studied by metallographic observation and energy spectrum analysis. The results show that electromagnetic stirring has an obvious effect on the uniformity of Sn content distribution along the thickness direction of C5240 billet; moreover, intermediate annealing has little effect on yield strength and tensile strength, but it can effectively improve fracture elongation and contribute to subsequent processing; In the process of thin strip rolling, the conductivity does not decrease with the increase of rolling passes, which shows that the effect of dislocation on the reduction of conductivity is not as great as that of solid solution atoms.