Copper alloy sheet material, connector, and method of producing a copper alloy sheet material

Patent metadata

Field	Value
Publication number	US-2016305002-A1
Application number	US-201615192256-A
Country	US
Kind code	A1
Filing date	Jun 24, 2016
Priority date	Dec 27, 2013
Publication date	Oct 20, 2016
Grant date	—

Abstract

A copper alloy sheet material, having an alloy composition containing at least one of Ni and Co in an amount of 1.80 to 8.00 mass % in total, Si in an amount of 0.40 to 2.00 mass %, and at least one element selected from the group consisting of Sn, Zn, Ag, Mn, P, Mg, Cr, Zr, Fe, and Ti in an amount of 0.000 to 2.000 mass % in total, with the balance being copper and unavoidable impurities, wherein the orientation density of the {121}<111> orientation is 6 or less, and the orientation density of the {110}<001> orientation is 4 or more; and wherein the density of grains having the {110}<001> orientation is 0.40 grains/μm 2 or more; a connector using thereof; and a method of producing the copper alloy sheet material.

First claim

1 . A copper alloy sheet material, having an alloy composition comprising at least one of Ni and Co in an amount of 1.80 to 8.00 mass % in total; Si in an amount of 0.40 to 2.00 mass %; and optionally at least one element selected from the group consisting of Sn, Zn, Ag, Mn, P, Mg, Cr, Zr, Fe, and Ti in an amount of 0.000 to 2.000 mass % in total, with the balance being copper and unavoidable impurities,
wherein an orientation density of a {121}<111> orientation is 6 or less, an orientation density of a {110}<001> orientation is 4 or more, and wherein a density of grains having a {110}<001> orientation is 0.40 grains/μm 2 or more.

2 . The copper alloy sheet material as claimed in claim 1 , which contains the at least one element selected from the group consisting of Sn, Zn, Ag, Mn, P, Mg, Cr, Zr, Fe, and Ti in an amount of 0.005 to 2.000 mass % in total.

3 . The copper alloy sheet material as claimed in claim 1 , wherein a Vickers hardness is 280 or more.

4 . A connector formed to contain the copper alloy sheet material as claimed in claim 1 .

5 . A method of producing a copper alloy sheet material, comprising the steps of:
melting and casting of raw materials having an alloying composition comprising at least one of Ni and Co in an amount of 1.80 to 8.00 mass % in total, Si in an amount of 0.40 to 2.00 mass %, and optionally at least one element selected from the group consisting of Sn, Zn, Ag, Mn, P, Mg, Cr, Zr, Fe, and Ti in an amount of 0.000 to 2.000 mass % in total, with the balance being copper and unavoidable impurities; intermediate cold-rolling with a working ratio of 20% to 70%; aging treatment of performing a heat treatment for 5 minutes to 10 hours at 300° C. to 440° C.; and final cold-rolling with a working ratio of 90% or more, in this order.

6 . The method of producing a copper alloy sheet material as claimed in claim 5 , wherein the copper alloy sheet material contains the at least one element selected from the group consisting of Sn, Zn, Ag, Mn, P, Mg, Cr, Zr, Fe, and Ti in an amount of 0.005 to 2.000 mass % in total.

7 . The method of producing a copper alloy sheet material as claimed in claim 5 ,
which carries out, in this order, the steps of: homogenization heat treatment of performing a heat treatment for one hour or more at 960° C. to 1,040° C.; and hot-working with a working ratio of 10% to 90% at a temperature range of 500° C. to 1,040° C. from the initiation to the end of the hot-working, between the melting and casting step and the intermediate cold-rolling step, and which carries out: no heat treatment at 480° C. or higher, after the hot-working step.

8 . The method of producing a copper alloy sheet material as claimed in claim 5 , which carries out a step of:
stress-relief annealing of maintaining the copper alloy sheet material for 5 seconds to 2 hours at 200° C. to 430° C., after the final cold-rolling step.

Assignees

• Furukawa Electric Co Ltd

Inventors

• Kaneko Hiroshi

Classifications

• C22C1/02

  by melting {(C22C1/1036 takes precedence)} · CPC title

• C22C9/06 Primary

  with nickel or cobalt as the next major constituent · CPC title

• C22C9/02

  with tin as the next major constituent · CPC title

• H01B1/026

  Alloys based on copper · CPC title

• C22F1/08 Primary

  of copper or alloys based thereon · CPC title