Copper alloy for electronic/electrical equipment, copper alloy thin sheet for electronic/electrical equipment, conductive component for electronic/electrical equipment, and terminal

Abstract

One example of this copper alloy for electronic / electrical equipment contains more than 2.0 mass% to not more than 36.5 mass% of Zn, 0.10 mass% to 0.90 mass% inclusive of Sn, at least 0.15 mass% to less than 1.00 mass% of Ni, and 0.005 mass% to 0.100 mass% inclusive of P, with the remainder comprising Cu and unavoidable impurities. The atomic ratios of the content of the elements satisfy 3.0<Ni / P<100.0 and 0.10<Sn / Ni<2.90, and the Vickers hardness of the alpha-phase surface that contains Cu, Zn, and Sn is at least 100.

Description

technical field [0001] The present invention relates to a Cu-Zn-Sn series copper alloy for electrical and electronic equipment used as a connector of a semiconductor device, other terminals, a movable conductive sheet of an electromagnetic relay, or a conductive element for an electrical and electronic equipment such as a lead frame, and its use The copper alloy thin plate for electronic and electrical equipment of the copper alloy for electronic and electrical equipment, a conductive element and a terminal for electronic and electrical equipment. [0002] This application claims priority based on Patent Application No. 2013-145008 filed in Japan on July 10, 2013 and Patent Application No. 2013-273549 filed in Japan on December 27, 2013, and uses the contents thereof here. Background technique [0003] Cu—Zn alloys have conventionally been widely used as the above-mentioned conductive elements for electronic and electrical equipment from the viewpoints of strength, workabili...

AI Technical Summary

Problems solved by technology

However, the above-mentioned Cu-Zn-Sn-based alloys have problems such as wear of the die and generation of stamping chips due to shearing and burrs during press working, and the shear workability is not sufficient.

[0020] Here, Patent Document 4 discloses that shear workability is improved by adding elements such as Pb, Bi, Se, Te, Ca, Sr, and MM to Cu-Zn-Sn alloys, but only these elements are added , the shear workability cannot be sufficiently improved

Also, since elements such as Pb, Bi, and Te are metals with low melting points, there is a possibility that the hot workability may be significantly deteriorated

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