Copper alloy wire, copper alloy stranded wire, coated electric wire, wire harness, and method for producing copper alloy wire

Patent metadata

Field	Value
Publication number	US-2016254074-A1
Application number	US-201415033472-A
Country	US
Kind code	A1
Filing date	Oct 15, 2014
Priority date	Nov 1, 2013
Publication date	Sep 1, 2016
Grant date	—

Abstract

A copper alloy wire for use as a conductor of an automotive electric wire includes in mass percent, Fe: 0.4% or more and 2.5% or less, Ti: 0.01% or more and 1.0% or less, one or more selected from the group consisting of Mg, Sn, Ag, Ni, In, Zn, Cr, Al and P: 0.01% or more and 2.0% or less in total, and the balance being Cu and unavoidable impurities. An O content in the copper alloy wire is preferably 20 ppm or less. A tensile strength of the copper alloy wire is preferably 450 MPa or more. An element wire elongation of the copper alloy wire is preferably 5% or more. An electrical conductivity of the copper alloy wire is preferably 62% IACS or more.

First claim

1 . A copper alloy wire for use as a conductor of an automotive electric wire, the copper alloy wire comprising in mass percent:
Fe: 0.4% or more and 2.5% or less; Ti: 0.01% or more and 1.0% or less; one or more elements selected from the group consisting of Mg, Sn, Ag, Ni, In, Zn, Cr, Al and P: 0.01% or more and 2.0% or less in total; and the balance being Cu and unavoidable impurities, wherein an O content is 20 ppm or less.

2 . (canceled)

3 . The copper alloy wire according to claim 1 , wherein a tensile strength of the copper alloy wire is 450 MPa or more.

4 . The copper alloy wire according to claim 1 , wherein an element wire elongation of the copper alloy wire is 5% or more.

5 . The copper alloy wire according to claim 1 , wherein an electrical conductivity of the copper alloy wire is 62% IACS or more.

6 . The copper alloy wire according to claim 1 , wherein a wire diameter of the copper alloy wire is 0.3 mm or less.

7 . A copper alloy stranded wire comprising seven copper alloy wires according to claim 1 , the seven copper alloy wires being twisted together.

8 . The copper alloy stranded wire according to claim 7 , wherein a conductor cross-sectional area of the copper alloy stranded wire is 0.22 mm 2 or less.

9 . The copper alloy stranded wire according to claim 7 , wherein a total elongation of the copper alloy stranded wire is 10% or more.

10 . The copper alloy stranded wire according to claim 7 , wherein a peel strength of the copper alloy stranded wire is 13 N or more.

11 . The copper alloy stranded wire according to claim 7 , wherein an impact resistance energy of the copper alloy stranded wire is 5 J/m or more.

12 . A coated electric wire comprising:
a conductor wire formed of a copper alloy stranded wire including a plurality of the copper alloy wires according to claim 1 being twisted together or a compressed wire obtained by subjecting the copper alloy stranded wire to compression forming; and an insulation coating layer covering an outer periphery of the conductor wire.

13 . A wire harness comprising:
the coated electric wire according to claim 12 ; and a terminal attached to an end of the coated electric wire.

14 . The wire harness according to claim 13 , wherein a terminal crimp strength of the terminal to the coated electric wire is 50 N or more.

15 . A method for producing a copper alloy wire for use as a conductor of an automotive electric wire, the method comprising the steps of:
forming a cast material comprising in mass percent Fe: 0.4% or more and 2.5% or less, Ti: 0.01% or more and 1.0% or less, one or more selected from the group consisting of Mg, Sn, Ag, Ni, In, Zn, Cr, Al and P: 0.01% or more and 2.0% or less in total, and the balance being Cu and unavoidable impurities, wherein an O content is 20 ppm or less; forming a wrought product by subjecting the cast material to plastic working; forming a drawn wire by subjecting the wrought product to wire drawing; and subjecting the drawn wire to heat treatment so that the drawn wire has a tensile strength of 450 MPa or more and an elongation of 5% or more.

16 . (canceled)

17 . The copper alloy wire according to claim 3 , wherein an element wire elongation of the copper alloy wire is 5% or more.

18 . The copper alloy wire according to claim 4 , wherein an electrical conductivity of the copper alloy wire is 62% IACS or more.

19 . The copper alloy wire according to claim 5 , wherein a wire diameter of the copper alloy wire is 0.3 mm or less.

20 . A copper alloy stranded wire comprising seven copper alloy wires according to claim 6 , the seven copper alloy wires being twisted together.

21 . A coated electric wire comprising:
a conductor wire formed of a copper alloy stranded wire including a plurality of the copper alloy wires according to claim 6 being twisted together or a compressed wire obtained by subjecting the copper alloy stranded wire to compression forming; and an insulation coating layer covering an outer periphery of the conductor wire.

22 . A wire harness comprising:
the coated electric wire according to claim 21 ; and a terminal attached to an end of the coated electric wire.

Assignees

• Autonetworks Technologies Ltd
• Sumitomo Wiring Systems
• Sumitomo Electric Industries

Inventors

• Kobayashi Hiroyuki
• Nakamura Masahiro
• Inoue Akiko
• Ootsuka Yasuyuki

Classifications

• H01B1/026

  Alloys based on copper · CPC title

• B22D21/005

  with high melting point, e.g. Be 1280 degrees C, Ti 1725 degrees C · CPC title

• H01B7/0045

  Cable-harnesses · CPC title

• C22C9/02

  with tin as the next major constituent · CPC title

• H01B13/0016

  for heat treatment · CPC title