Aluminum alloy wire and method of producing the same

Patent metadata

Field	Value
Publication number	US-9580784-B2
Application number	US-201414497744-A
Country	US
Kind code	B2
Filing date	Sep 26, 2014
Priority date	Mar 29, 2012
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

An aluminum alloy wire, having an alloy composition which contains: 0.01 to 1.2 mass % of Fe, 0.1 to 1.0 mass % of Mg, and 0.1 to 1.0 mass % of Si, with the balance being Al and inevitable impurities, in which a grain size is 1 to 30 μm, and in which a dispersion density of Mg 2 Si needle precipitate in the aluminum alloy is 10 to 200/μm 2 ; and a method of producing the same.

First claim

The invention claimed is:

1. An aluminum alloy wire, having an alloy composition which consists essentially of: 0.01 to 1.2 mass % of Fe, 0.1 to 1.0 mass % of Mg, and 0.1 to 1.0 mass % of Si, optionally 0.01 to 0.5 mass % of Cu, and further optionally at least one of Ti and B in a total amount of 0.001 to 0.03 mass %, with the balance being Al and inevitable impurities,
wherein a grain size is 1 to 30 μm, and
wherein a dispersion density of Mg 2 Si needle precipitate in the aluminum alloy is 10 to 200/μm 2 .

2. A method of producing the aluminum alloy wire according to claim 1 , consisting essentially the steps of: melting, casting, hot working, first wire-drawing, first heat treatment, second wire-drawing, second heat treatment, and aging, in this order,
wherein the second heat treatment is a solution heat treatment that is conducted by a continuous electric heat treatment, and the conditions therefor satisfy a relationship represented by formulas:
0.03 ≦x ≦0.73, and

22 x −0.4 +500≦ y≦ 18 x −0.4 +560

in which x represents an annealing time period (sec), y represents a wire temperature (° C.), and the x in the left side and the right side is the same value.

3. The method according to claim 2 of producing the aluminum alloy wire, wherein an aging temperature of the aging is 140 to 220° C.

4. The method according to claim 2 of producing the aluminum alloy wire, wherein a degree of working in the second wire-drawing is 3 to 6.

5. A method of producing the aluminum alloy wire according to claim 1 , consisting essentially the steps of: melting, casting, hot working, first wire-drawing, first heat treatment, second wire-drawing, second heat treatment, and aging, in this order,
wherein the second heat treatment is a solution heat treatment that is conducted by a continuous running heat treatment, and the conditions therefor satisfy a relationship represented by formulas:
1.5≦ x≦ 5, and

−8.5 x+ 612≦ z≦− 8.5 x+ 667

in which x represents an annealing time period (sec), z represents an annealing furnace temperature (° C.), and the x in the left side and the right side is the same value.

6. The method according to claim 5 of producing the aluminum alloy wire, wherein an aging temperature of the aging is 140 to 220° C.

7. The method according to claim 5 of producing the aluminum alloy wire, wherein a degree of working in the second wire-drawing is 3 to 6.

8. The method according to claim 3 of producing the aluminum alloy wire, wherein a degree of working in the second wire-drawing is 3 to 6.

9. The method according to claim 6 of producing the aluminum alloy wire, wherein a degree of working in the second wire-drawing is 3 to 6.

Assignees

• Furukawa Electric Co Ltd
• Furukawa Automotive Systems Inc

Inventors

• Sekiya Shigeki
• Susai Kyota

Classifications

• C22C21/02

  with silicon as the next major constituent · CPC title

• H01B1/023

  Alloys based on aluminium · CPC title

• C22C21/00

  Alloys based on aluminium · CPC title

• B21C1/003

  Drawing materials of special alloys so far as the composition of the alloy requires or permits special drawing methods or sequences · CPC title

• C22F1/047

  of alloys with magnesium as the next major constituent · CPC title