Copper alloy wire, copper alloy stranded wire, covered electric wire, and terminal-fitted electric wire

Patent metadata

Field	Value
Publication number	US-10128018-B2
Application number	US-201515112643-A
Country	US
Kind code	B2
Filing date	Aug 3, 2015
Priority date	Aug 8, 2014
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

A copper alloy wire can be used as a conductor. The copper alloy wire is made of a copper alloy containing: not less than 0.4 mass % and not more than 1.5 mass % of Fe; not less than 0.1 mass % and not more than 0.7 mass % of Ti; not less than 0.02 mass % and not more than 0.15 mass % of Mg; not less than 10 mass ppm and not more than 500 mass ppm in total of C and at least one of Si and Mn; and the balance of Cu and impurities. The copper alloy wire has a wire diameter of not more than 0.5 mm. Preferably, a mass ratio Fe/Ti in the copper alloy is not less than 1.0 and not more than 5.5.

First claim

The invention claimed is:

1. A copper alloy wire to be used as a conductor for a wire harness,
the copper alloy wire being made of a copper alloy comprising:
not less than 0.4 mass % and not more than 1.5 mass % of Fe;
not less than 0.1 mass % and not more than 0.7 mass % of Ti;
not less than 0.02 mass % and not more than 0.15 mass % of Mg;
not less than 10 mass ppm and not more than 500 mass ppm in total of C and at least one of Si and Mn; and
the balance of Cu and impurities,
the copper alloy wire having a wire diameter of not more than 0.5 mm, wherein
each of the Si and the Mn is less than 10 mass ppm and the C is not less than 20 mass ppm and not more than 200 mass ppm,
a mass ratio Fe/Ti is not less than 1.0 and not more than 5.5.

2. The copper alloy wire according to claim 1 , wherein the copper alloy wire has an average crystal grain size of not more than 10 μm.

3. The copper alloy wire according to claim 1 , wherein the copper alloy wire has an elongation of not less than 5%.

4. The copper alloy wire according to claim 1 , wherein the copper alloy wire has an electrical conductivity of not less than 60% IACS and a tensile strength of not less than 450 MPa.

5. The copper alloy wire according to claim 1 , wherein
the copper alloy wire has an electrical conductivity of not less than 60% IACS, a tensile strength σB of not less than 450 MPa, and an elongation ε of not less than 5%, and
σB+25ε≥650 is satisfied.

6. A copper alloy stranded wire made up of a plurality of stranded copper alloy wires as recited in claim 1 .

7. The copper alloy stranded wire according to claim 6 , wherein the copper alloy stranded wire is a compression-formed copper alloy stranded wire.

8. The copper alloy stranded wire according to claim 6 , wherein the copper alloy stranded wire has a twist pitch of not less than 10 mm and not more than 20 mm.

9. The copper alloy stranded wire according to claim 6 , wherein the copper alloy stranded wire has a cross-sectional area of not less than 0.03 mm 2 and not more than 0.5 mm 2 .

10. A covered electric wire comprising a conductor and an insulating coating layer outside the conductor,
the conductor being a copper alloy stranded wire as recited in claim 6 .

11. A covered electric wire comprising a conductor and an insulating coating layer outside the conductor,
the conductor being a copper alloy wire as recited in claim 1 .

12. A terminal-fitted electric wire comprising a covered electric wire as recited in claim 11 , and a terminal portion attached to an end of the covered electric wire.

Assignees

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

Inventors

• Inoue Akiko
• Kuwabara Tetsuya
• Nishikawa Taichiro
• Utsunomiya Kiyotaka
• Fujita Hiroshi
• Ootsuka Yasuyuki
• Kobayashi Hiroyuki

Classifications

• C22C9/00

  Alloys based on copper · CPC title

• B22D11/005

  of wire (casting on wire B22D19/14) · CPC title

• H01B7/0009

  Details relating to the conductive cores · CPC title

• C22F1/08

  of copper or alloys based thereon · CPC title

• H01B1/026 Primary

  Alloys based on copper · CPC title