本发明采用机器学习方法设计了一种新型高强中导Cu‑Ni‑Co‑Si系合金及其制备方法，属于新材料设计与开发技术领域。开发的低钴含量Cu‑Ni‑Co‑Si系合金成分特征在于：Ni含量为1.50wt％～2.50wt％，Co含量为0.20wt％～0.49wt％，Si含量为0.50wt％～1.20wt％，Mg含量为0.05wt％～0.40wt％，Zn含量为0.05wt％～0.50wt％，余量Cu。根据需要，还可以添加Zr、Cr、Ca、Ti或稀土等一种或多种微合金化元素，以提升合金的使用性能。与现有Cu‑Ni‑Co‑Si系典型高性能合金C70350相比，本发明合金成分的主要特点包括：(1)超低Co含量，低于C70350合金Co含量下限的一半；(2)含有Mg、Zn合金元素，为六元或六元以上的复杂多元合金。所设计合金抗拉强度可达850～900MPa，断后伸长率为7.0％～10.0％，导电率为45％～55％IACS，适合大规模工业化生产与应用。

The present invention adopts machine learning methods to design a novel high-strength medium conductivity Cu-Ni-Co-Si alloy and its preparation method, belonging to the field of new material design and development technology. The composition characteristics of the developed low cobalt content Cu-Ni-Co-Si alloy system are as follows: Ni content ranges from 1.50wt% to 2.50wt%, Co content ranges from 0.20wt% to 0.49wt%, Si content ranges from 0.50wt% to 1.20wt%, Mg content ranges from 0.05wt% to 0.40wt%, Zn content ranges from 0.05wt% to 0.50wt%, and the remaining Cu. As needed, one or more microalloying elements such as Zr, Cr, Ca, Ti, or rare earths can also be added to enhance the performance of the alloy. Compared with the typical high-performance alloy C70350 of the existing Cu Ni Co Si system, the main characteristics of the alloy composition of the present invention include: (1) ultra-low Co content, lower than half of the lower limit of Co content in C70350 alloy; (2) Containing Mg and Zn alloy elements, it is a complex multicomponent alloy with six or more elements. The designed alloy has a tensile strength of 850-900MPa, an elongation after fracture of 7.0-10.0%, and a conductivity of 45-55% IACS, making it suitable for large-scale industrial production and application.