本发明提供一种高强度高导电高塑性的铜合金及其制备方法。本发明高强度高导电高塑性的铜合金，包括重量配比如下的各组分：Cr0.3-0.6％；Zr0.1-0.3％；Hf0.1-0.3％；余量为Cu。高强度高导电高塑性的铜合金的制备方法，包括以下步骤：采用真空非自耗电弧炉制备CuZrHf中间合金；采用真空中频感应熔炼炉制备高强度高导电高塑性的铜合金；通过二次加料斗向真空中频感应熔炼炉中加入Cr片；向熔体中加入CuZrHf中间合金，浇注后得到高强度高导电高塑性的铜合金。本发明与CuCrZr系列合金相比在相同的塑性变形工艺下，均匀伸长率提升38％-80％，实现同时兼顾高强度、高导电性以及高塑性。

The invention provides a copper alloy with high strength, high conductivity and high plasticity and a preparation method thereof. The high-strength, high-conductivity and high-plasticity copper alloy of the present invention includes the following components by weight ratio:Cr 0.3-0.6%; Zr 0.1-0.3%; Hf 0.1-0.3%; the balance is Cu. The preparation method of high-strength, high-conductivity and high-plasticity copper alloy includes the following steps: adopting vacuum non-consumable electric arc furnace to prepare CuZrHf master alloy; adopting vacuum intermediate frequency induction melting furnace to prepare high-strength, high-conductivity and high-plasticity copper alloy;The charging hopper adds Cr flakes to the vacuum intermediate frequency induction melting furnace; adds CuZrHf master alloy to the melt, and obtains a copper alloy with high strength, high conductivity and high plasticity after pouring. Compared with the CuCrZr series alloy, the uniform elongation rate of the present invention is increased by 38% to 80% under the same plastic deformation process, and realizes the simultaneous consideration of high strength, high conductivity and high plasticity.