High-strength copper alloy forging material

Abstract

The present invention relates to a high-strength copper alloy forging material having properties of high hardness, high strength and high thermal conductivity.The high-strength copper alloy forging material contains, in mass %, 3 to 7.2% of Ni, 0.7 to 1.8% of Si, 0.02 to 0.35% of Zr and 0.002 to 0.05% of P, and further contains 1.5% or less of one or two or more of Cr, Mn and Zn in total, as needed, whereby appropriate amounts of Zr and P act to cause cracks to be less likely to occur in the material during working or heat treatment. After the working and the heat treatment, the forging material of the invention can have properties of high hardness, high strength and high thermal conductivity, and can be suitably used for resin injection mold materials, aircraft components and the like.

Description

TECHNICAL FIELD[0001]The present invention relates to a high-strength copper alloy forging material suitable for forged moldings and the like, including resin injection mold materials.BACKGROUND ART[0002]As alloys excellent in electrical conductivity and thermal conductivity, there have hitherto been used copper alloys such as brass (Cu—Zn-based), bronze (Cu—Sn-based), Be copper and Corson alloy (Cu—Ni—Si-based). In particular, Be copper, Corson alloy and the like have been used for resin injection mold materials, aircraft components and the like requiring strength and hardness, together with thermal conductivity. However, the above-described Be copper has concerns about toxicity of dust generated at the time of melting or working thereof, so that replacements therefor have been demanded. Further, for the Corson alloy, higher thermal conductivity, higher strength and higher hardness have been demanded.[0003]Furthermore, generally in the Cu alloys, cracks easily occur at the time of ...

AI Technical Summary

Benefits of technology

The invention reduces the likelihood of cracks occurring in a material during working and heat treatment, resulting in a high-strength copper alloy with high hardness, strength, and thermal conductivity.

Problems solved by technology

However, the above-described Be copper has concerns about toxicity of dust generated at the time of melting or working thereof, so that replacements therefor have been demanded.

Furthermore, generally in the Cu alloys, cracks easily occur at the time of forging or heat treatment, so that there is also demanded improvement in ductility, in addition to hot workability.