本发明提供了一种Cu‑Ni‑Si‑Fe系合金及其制备方法和应用。该合金通过成分优化，采用贱金属Fe元素替代Cu‑Ni‑Co‑Si合金中的部分甚至所有Co元素，借助Fe与Si之间的强原子结合力形成具有高硬度、高耐热的纳米级FeSi相颗粒，得到了一种低成本高强高导合金。本发明还提供了该合金的制备方法和应用。

The present invention provides a Cu-Ni-Si-Fe alloy and its preparation method and application. This alloy is optimized by using a base metal Fe element to replace some or even all Co elements in the Cu-Ni-Co-Si alloy. With the strong atomic bonding between Fe and Si, nanoscale FeSi phase particles with high hardness and heat resistance are formed, resulting in a low-cost, high-strength, and high conductivity alloy. The present invention also provides a preparation method and application of the alloy.