Copper alloy sheet, method for manufacturing same, drawing product, electric/electronic component member, electromagnetic shield material, and heat dissipation component

Abstract

A copper alloy sheet according to the present invention has a composition containing 1.0-5.0 mass% in total of at least one among Ni and Co, and 0.1-1.5 mass% of Si, with the remainder comprising Cu and inevitable impurities, and has a conductivity of at least 38% IACS, wherein, for three types of test specimens respectively cut in a direction parallel to the rolling direction, a direction at 45 degrees to the rolling direction, and a direction perpendicular to the rolling direction, the arithmetic mean value Aave. is in the range of 4.0-13.0 GPa.% as calculated by substituting values obtained from nominal stress-nominal strain curves obtained from tensile tests, and values of Cube azimuth area ratios obtained by the electron backscatter diffraction (EBSD) method into specific equation 1 to determine the values of A<0degree>, A<45degree>, and A<90degree> for respective directions of parameter Ax (x: 0 degree, 45 degrees, 90 degrees), and substituting the determined values of A<0degree>, A<45degree>, and A<90degree> for respective directions into specific equation 2. According to the present invention, excellent drawability can be reliably obtained without compromising the basic properties (in particular, heat dissipation) of conventional copper alloy sheets.

Description

technical field [0001] The present invention relates to a copper alloy sheet material, a method for producing the same, a deep-drawn product, a member for electric and electronic components, an electromagnetic wave shielding material, and a heat radiation component. Background technique [0002] Copper alloy sheets, such as connectors for electrical and electronic components, lead frames, relays, switches, sockets, shielding covers, shielding cases, liquid crystal reinforcement boards, liquid crystal chassis, organic EL display reinforcement boards, connections for automobiles Copper alloy sheets used in devices, shielding cases, shielding cases, etc. are usually stamped, bent, drawn, and bulged. [0003] In the case of using a conventional copper alloy sheet material, mechanical and electrical properties had to be sacrificed in order to realize a difficult-to-machine shape that should have been difficult to achieve. The term "difficult-to-machine shape" as used herein mean...

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned Patent Documents 1 to 3 are all inventions related to copper alloy sheet materials containing at least one of Ni and Co and Si, and describe that they have good drawing workability, but in the steps constituting the production method of copper alloy sheet materials , especially in a series of processes from the cold finish rolling process to the quenching and tempering annealing process, there is no control for suppressing the formation of grains (which deteriorates the drawability), so especially when performing a deep drawing test In the case of severe processing conditions, especially in the case of drawing with a punch with a small radius of curvature R at the corner (for example, the radius of curvature R is 0.9 mm or less), there is a possibility that satisfactory results cannot be stably obtained. The problem of horizontal drawing workability

Images