Copper alloy sheet

Abstract

Provided is a Corson copper alloy sheet which satisfies property requirements for terminals or connectors, such as strength and bendability. The copper alloy sheet is a copper alloy sheet for electric / electronic components which has a copper alloy composition containing, in terms of mass%, 0.8-5% Ni and / or Co and 0.2-1.5% Si, with the remainder comprising Cu and incidental impurities, wherein the areal proportion of crystal grains deflected at an angle less than 15 from the cube orientation has been regulated so as to be less than 10% and the areal proportion of crystal grains deflected at an angle of 15-30 from the cube orientation has been regulated to 15% or higher. The copper alloy sheet has excellent strength and bendability.

Description

technical field [0001] The present invention relates to an excellent copper alloy sheet material, and particularly relates to a copper alloy sheet material having excellent strength and bending workability suitable for connection parts such as automotive terminals and connectors. Background technique [0002] In recent years, the demand for miniaturization and weight reduction of electronic equipment has increased, and the miniaturization and weight reduction of electrical and electronic components have continued to progress. The lower profile and narrower pitch of connector terminals have been developed. As a result, copper alloy sheets used for these connector terminals have been required to have higher strength and better bending workability. Beryllium copper is currently widely used as a copper alloy sheet material requiring high strength and excellent bending workability, but beryllium copper is very expensive, and metal beryllium is highly toxic. Therefore, as an allo...

AI Technical Summary

Problems solved by technology

[0004] However, in this Corson copper-nickel-silicon alloy, if the strength of the copper alloy sheet is increased, the electrical conductivity and bending workability will decrease.

That is, in the high-strength Corson copper-nickel-silicon alloy, there is a problem that it is very difficult to have good electrical conductivity and bending workability

However, according to the findings of the inventors of the present invention, increasing the Cube orientation or the (200) diffraction intensity of X-rays is indeed effective in improving the bending workability, but there is a problem that if these properties are improved, the work hardening coefficient when the material is deformed will change. small, lower tensile strength

Images