Lead-free copper alloy for casting, preparation method of lead-free copper alloy and product cast from lead-free copper alloy for casting

The invention relates to a lead-free copper alloy for casting, a preparation method of the lead-free copper alloy and a product cast from the lead-free copper alloy for casting. The lead-free copper alloy for casting comprises the following components: 58.5 wt%-60 wt% of Cu, 0.05 wt%-0.3 wt% of Si, 1.05 wt%-1.5 wt% of Sn, 0.2 wt%-0.4 wt% of Fe, 0.001 wt%-0.05 wt% of metamorphic elements and the balance of Zn and inevitable impurities, wherein the metamorphic elements are at least one of B, Ti, Zr and rare earth elements. The lead-free copper alloy provided by the invention meets the comprehensive requirements of bathroom faucets and valves on multiple aspects of cost, cutting performance, casting molding performance, corrosion resistance, mechanical properties, health, market acceptance and the like of raw materials, and has a very good application prospect. 本申请涉及铸造用无铅铜合金、其制备方法及由铸造用无铅铜合金铸造的产品。所述铸造用无铅铜合金包含以下组分：58.5wt％-60wt％的Cu、0.05wt％-0.3wt％的Si、1.05wt％-1.5wt％的Sn、0.2wt％-0.4wt％的Fe、0.001wt％-0.05wt％的变质元素，余量为Zn和不可避