Cu-fe-mn-p series alloy material and manufacturing method therefor

Abstract

The present invention provides a Cu-Fe-Mn-P series alloy material, comprising 0.15-0.50 wt% of Fe, 0.15-0.50 wt% of Mn and 0.05-0.30 wt% of P, and further comprising one or more selected from Ni, Mg, Cr, Sn, Zn, Zr, Ag, Ti and lanthanide series rare earth elements, the total amount of which is 0.15 wt% or less, the remainder consisting of Cu and unavoidable impurities; the composition proportional relationships in the following formulas (1), (2) and (3) are satisfied: (1) {Fe}+{Mn}+{P}≤1.0％; (2) 0.5≤{Fe} / {Mn}≤2.0; (3) 2.0≤({Fe}+{Mn}) / {P}≤5.0, wherein {Fe}, {Mn} and {P} respectively represent weight percentages wt% of Fe, Mn and P in the Cu-Fe-Mn-P series alloy material. The Cu-Fe-Mn-P series alloy material has electrical conductivity of ≧60% IACS and tensile strength of ≧600 MPa, has good bending machinability, with the ratio R / t of a minimum bending radius to a plate thickness being less than 2.0, and can withstand a temperature of ≧500°C. The Cu-Fe-Mn-P series alloy material can be produced by using conventional copper alloy casting, processing and heat treatment apparatuses, is manufactured by means of a special heat treatment process combining high-temperature short-time treatment and low-temperature long-time treatment, and can be used in fields requiring wide characteristics of electrical conductivity of 60-90% IACS and corresponding tensile strength of 800-600 MPa.

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