本发明涉及一种多元复合析出强化型高强高导铜合金及其制备方法,属于金属材料制备加工技术领域。合金成分质量百分比为：Ni为1.0-6.0％,Si为0.2-1.5％，Zn为0.1-0.5％，Cr为0.1-0.5％，P为0.01-0.1％，不可避免的杂质元素含量总和小于0.1％，其余为Cu。制备工艺：熔铸→均匀化→热轧→双面铣→粗冷轧→切边→一次在线淬火→预精轧→二次在线淬火→一次精轧→一次时效→二次精轧→二次时效。二次时效后合金抗强强度大于800 MPa、导电率大于50 ％IACS,析出相有δ-Ni₂Si和包含Cu、Ni、Si、Cr和P元素的复杂析出相。本发明具有易熔炼、复合析出强化、高抗拉强度和高导电率等优点。

The invention relates to a high–strength and high–conductivity copper alloy with multi–element compound precipitation strengthening type and a preparation method thereof, belonging to the technical field of metal material preparation and processing. The composition of the alloy is as follows: Ni is 1.0-.0% , Si is 0.2-1.5% , Zn is 0.1-0.5% , Cr is 0.1-0.5% , P is 0.01-0.1%, The sum of the unavoidable impurity elements is less than 0.1% , the rest is Cu. Preparation process: melt Casting → homogenization → hot rolling → double side milling → rough cold rolling → trimming → primary on–line quenching → pre–finishing rolling → secondary on–line quenching → primary finishing rolling → primary aging → secondary finishing rolling → secondary aging. After the second aging, the strength of the alloy is more than 800 MPa, the conductivity is more than 50% IACS, and the precipitates are Ni₂Si and complex precipitates containing Cu, Ni, Si, Cr and P. The invention has the advantages of easy melting, compound precipitation strengthening, high tensile strength and high conductivity, etc.