ALUMINUM ALLOY WIRE, AND ALUMINUM ALLOY TWISTED WIRE, COVERED ELECTRICAL WIRE AND WIRE HARNESS USING THE SAME

• US 20130264115A1
• Filed: 04/03/2012
• Published: 10/10/2013
• Est. Priority Date: 04/11/2011
• Status: Active Grant

• Current Assignee: Autonetworks Technologies, Ltd. (Sumitomo Corporation), Sumitomo Electric Industries Limited (Sumitomo Corporation), Sumitomo Wiring Systems Limited (Sumitomo Corporation)
• Original Assignee: Autonetworks Technologies, Ltd. (Sumitomo Corporation), Sumitomo Electric Industries Limited (Sumitomo Corporation), Sumitomo Wiring Systems Limited (Sumitomo Corporation)
• Inventors: Nakai, Yoshihiro, Nishikawa, Taichiro, Takaki, Yoshiyuki, Kusakari, Misato, Otsuka, Yasuyuki, Kobayashi, Hiroyuki
• Granted Patent: US 9,564,254 B2
• Time in Patent Office: Days
• US Class Current: 174/72.A
• CPC Class Codes: C22C 21/00 Alloys based on aluminium
• CPC Class Codes: C22C 21/02 with silicon as the next major constituent
• CPC Class Codes: C22C 21/06 with magnesium as the next major constituent
• CPC Class Codes: C22C 21/08 with silicon
• CPC Class Codes: C22F 1/00 Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working apparatus for mechanical working of metal B21, B23, B24
• CPC Class Codes: C22F 1/04 of aluminium or alloys based thereon
• CPC Class Codes: C22F 1/047 of alloys with magnesium as the next major constituent
• CPC Class Codes: C22F 1/05 of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
• CPC Class Codes: H01B 1/023 Alloys based on aluminium
• CPC Class Codes: H01B 5/08 Several wires or the like stranded in the form of a rope
• CPC Class Codes: H01B 7/00 Insulated conductors or cables characterised by their form
• CPC Class Codes: H01B 7/0045 Cable-harnesses

Abstract

An aluminum (Al) alloy wire, which is an extra fine wire having a wire diameter of 0.5 mm or less, contains, in mass %, Mg at 0.03% to 1.5%, Si at 0.02% to 2.0%, at least one element selected from Cu, Fe, Cr, Mn and Zr at a total of 0.1% to 1.0% and the balance being Al and impurities, and has an electrical conductivity of 40% IACS or more, a tensile strength of 150 MPa or more, and an elongation of 5% or more. By producing the extra fine wire from an Al alloy of a specific composition containing Zr, Mn and other specific elements, though the extra fine wire is extra fine, it has a fine structure with a maximum grain size of 50 μm or less and is superior in elongation.

Claims

1. An aluminum alloy wire to be used as a conductor, containing in mass %:

Mg at 0.2% to 1.5%;

Si at 0.1% to 2.0%;

Fe at 0.1% to 1.0%, or at least one element selected from Cu, Cr, Mn and Fe at a total of 0.1% to 1.0%;

Ti at 0.08% or less and B at 0.016% or less; and

the balance being Al and impurities,

and having;

an electrical conductivity of 40% IACS or more;

a tensile strength of 150 MPa or more;

an elongation of 5% or more;

a wire diameter of 0.5 mm or less; and

a maximum grain size of 50 μ

m or less.

2. The aluminum alloy wire according to claim 1 contains Zr at 0.01 mass % or more.

3. The aluminum alloy wire according to claim 1 contains Mn at 0.01 mass % or more.

4. The aluminum alloy wire according to claim 1, wherein the tensile strength after being retained for 1000 hours at an arbitrary temperature selected from a temperature range of 80°

C. to 150°

C. is 150 MPa or more.

5. The aluminum alloy wire according to claim 1, wherein the tensile strength at an arbitrary temperature selected from a temperature range of 80°

C. to 150°

C. is 150 MPa or more.

7. An aluminum alloy twisted wire obtained by twisting together a plurality of the aluminum alloy wires according to claim 1.

8. A covered electrical wire including a conductor which is any of the aluminum alloy wire according to claim 1, an aluminum alloy twisted wire obtained by twisting together a plurality of the aluminum alloy wires according to claim 1 and a compression wire obtained by compression molding the aluminum alloy twisted wire, and an insulation covering layer on an outer periphery of the conductor.

9. A wire harness including the covered electrical wire according to claim 8 and a terminal section installed at an end portion of the covered electrical wire.

6. (canceled)