Copper alloy sheet material, manufacturing method thereof, and deep-drawn product

Abstract

The copper alloy sheet material of the present invention has the following composition: a total of 1.0 to 5.0% by mass of one or more of Ni and Co, and 0.1 to 1.5% by mass of Si, the balance being Cu and unavoidable impurities, the aforementioned copper The electrical conductivity of the alloy plate is 38% IACS or more. Substituting the value obtained from the nominal stress-nominal strain curve and the value of the Cube orientation area ratio obtained by the electron backscatter diffraction (EBSD) method into the specific first formula, the The value A of each direction of the parameter Ax (x: 0°, 45°, 90°) 0° 、A 45° and A 90° , the obtained value A of each direction above 0° 、A 45° and A 90° The arithmetic mean Aave. calculated by substituting the specific second formula is in the range of 4.0 to 13.0 GPa·%. The direction of 45°, and three kinds of test pieces cut out in each direction in the vertical direction of rolling are obtained by tensile test, and the basic characteristics (especially heat dissipation) of the conventional copper alloy sheet are not damaged, and can be Excellent drawing workability is stably obtained.

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...

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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

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