Copper alloy sheet having excellent conductivity and bending deflection factor

Abstract

Provided are: a copper alloy sheet which exhibits a high strength, a high conductivity, a high bending deflection factor and excellent stress relaxation characteristics; and an electronic component which is suitable for large-current applications or heat dissipation applications. A copper alloy sheet characterized by: containing 0.8 to 5.0mass% of Ni and / or Co and 0.2 to 1.5mass% of Si with the balance being copper and unavoidable impurities; having a tensile strength of 500MPa or more; and exhibiting an A value of 0.5 or more as defined by the formulae, namely, A = 2X(111) + X(220) - X(200) and X(hkl) = I(hkl) / I0(hkl) [wherein I(hkl) and I0(hkl) are integrated diffraction intensities of the rolled surface and the (hkl) plane of copper powder as determined by an X-ray diffraction method].

Description

technical field [0001] The present invention relates to copper alloy plates and electronic parts for energization or heat dissipation, and particularly relates to electronic parts used as terminals, connectors, relays, switches, sockets, busbars, lead frames, heat sinks, etc. mounted on motors, electronic equipment, automobiles, etc. Copper alloy plates used as raw materials for parts, and electronic parts using the copper alloy plates. Among them, the application of high-current electronic components such as high-current connectors and terminals suitable for electric vehicles, hybrid vehicles, etc., or the application of heat-dissipating electronic components such as liquid crystal frames used in smartphones and tablet PCs Copper alloy plate and electronic parts using the copper alloy plate. Background technique [0002] There are terminals, connectors, switches, sockets, relays, busbars, lead frames, heat sinks and other parts used for electric conduction or heat conducti...

AI Technical Summary

Problems solved by technology

[0018] As exemplified above, the conventional Corson alloy has high electrical conductivity and strength, but its TD bending deformation coefficient is not a grade that can meet the application of parts that flow large currents or parts that dissipate a lot of heat

In addition, conventional Corson alloys have relatively good stress relaxation properties, but the level of stress relaxation properties may not be sufficient for parts that flow large currents or parts that dissipate a lot of heat

In particular, Corson alloys with high bending deformation coefficient and excellent stress relaxation properties have not been reported so far

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