Copper alloy material for parts of electronic and electric machinery and tools

a technology of electronic and electric machinery and parts, applied in the direction of coupling contact members, transportation and packaging, contacts, etc., can solve the problems of inability to meet the requirements of cu-zn alloys, cu-fe alloys and cu-sn alloys, and the inability of cu-zn alloys to be used for a long period of time, and achieve the effect of maintaining mechanical strength and elasticity, improving bending properties, and improving bending properties
US20020127133A1Inactive Publication Date: 2002-09-12FURUKAWA ELECTRIC CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
FURUKAWA ELECTRIC CO LTD
Publication Date
2002-09-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

A copper alloy material for parts of electronic and electric machinery and tools contains 1.0 to 3.0 mass % of Ni, 0.2 to 0.7 mass % of Si, 0.01 to 0.2 mass % of Mg, 0.05 to 1.5 mass % of Sn, 0.2 to 1.5 mass % of Zn, and less than 0.005 mass % (including 0 mass %) of S, with the balance being Cu and inevitable impurities, wherein the copper alloy material has: (1) a specific crystal grain diameter, and a specific ratio between the longer diameters of a crystal grain on a cross section parallel or perpendicular to a direction of final plastic working; and / or (2) a specific surface roughness after the final plastic working.
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Description

[0001] This is a continuation of PCT Application PCT / JP01 / 04351, filed May 24, 2001. The prior PCT application was not published in English under PCT Article 21(2).TECHNICAL FIELD

[0002] The present invention relates to a copper alloy material for parts of electronic and electric machinery and tools, in particular to the copper alloy material for parts of electronic and electric machinery and tools, which is excellent in bending property and stress relaxation property, and which can sufficiently cope with miniaturization of parts of electronic and electric machinery and tools, such as terminals, connectors, switches and relays.BACKGROUND ART

[0003] Hitherto, copper alloys, such as Cu--Zn alloys, Cu--Fe-alloys that are excellent in heat resistance, and Cu--Sn alloys, have been frequently used for parts of electronic and electric machinery and tools. While inexpensive Cu--Zn alloys have been used frequently, for example, in automobiles, the Cu--Zn alloys as well as Cu--Fe alloys and Cu-...

Claims

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