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Copper alloy sheet with excellent electrical conductivity and stress relaxation properties

A technology of copper alloy plate and electronic parts, which is applied in the field of electronic parts, can solve the problems of stress, that is, the reduction of contact force and the increase of contact resistance, and achieve the effects of high conductivity, high strength and excellent stress relaxation characteristics

Active Publication Date: 2016-08-31
JX NIPPON MINING & METALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the copper alloy imparted with flexure is kept at high temperature for a long time, the stress, that is, the contact force, will decrease due to the stress relaxation phenomenon, resulting in an increase in contact resistance.

Method used

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  • Copper alloy sheet with excellent electrical conductivity and stress relaxation properties
  • Copper alloy sheet with excellent electrical conductivity and stress relaxation properties
  • Copper alloy sheet with excellent electrical conductivity and stress relaxation properties

Examples

Experimental program
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Effect test

Embodiment

[0052] Examples of the present invention and comparative examples are given below, but these examples are provided for better understanding of the present invention and its advantages, and are not intended to limit the invention.

[0053] After adding alloying elements to molten copper, it is cast into an ingot with a thickness of 200mm. The ingot was heated at 950° C. for 3 hours, and hot-rolled to form a plate with a thickness of 15 mm. After grinding and removing scale on the surface of the hot-rolled sheet, annealing and cold-rolling are repeated, and the final cold-rolling is finished to a predetermined product thickness. Finally, stress relief annealing was performed using a continuous annealing furnace.

[0054] A batch furnace was used for the final recrystallization annealing, the heating time was set to 5 hours, and the furnace temperature was adjusted within the range of 250 to 700° C. to change the crystal grain size and electrical conductivity after annealing.

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Abstract

　Provided are: a copper alloy sheet having high strength, high electro-conductivity and outstanding stress release characteristics; a method for producing copper alloy sheet; and high-current electronic components and heat-radiating electronic components using this copper alloy sheet.　This copper steel sheet contains 0.01-0.50 mass% of a total of Zr and / or Ti, with the remainder being made up of copper and unavoidably impurities, has a yield strength of 0.2% at 330MPa or more, and when heated at 250°C for 30 minutes, the thermal expansion rate in the rolling direction does not exceed 50ppm.

Description

technical field [0001] The present invention relates to a copper alloy plate and an electronic component for conducting electricity or cooling, and particularly relates to a terminal, a connector, a relay, a switch, a socket, a bus bar, a lead frame, a cooling plate, etc., which are mounted on motors / electronic equipment, automobiles, etc. A copper alloy plate used as a raw material of an electronic component, a method for producing the same, and an electronic component using the copper alloy plate. Among them, it is particularly suitable for the application of high-current electronic components such as high-current connectors and terminals used in electric vehicles and hybrid vehicles, or for heat dissipation such as liquid crystal frames used in smartphones and tablet PCs. A copper alloy plate for use in electronic parts, a method for producing the same, and an electronic part using the copper alloy plate. Background technique [0002] In electrical / electronic equipment, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C9/02C22C9/04C22C9/05C22C9/06C22C9/10C22F1/08C22F1/00
CPCC22C9/00C22F1/08
Inventor 波多野隆绍
Owner JX NIPPON MINING & METALS CORP