Aluminum alloy wire and method of producing the same

• US 9,580,784 B2
• Filed: 09/26/2014
• Issued: 02/28/2017
• Est. Priority Date: 03/29/2012
• Status: Active Grant

• Current Assignee: Furukawa Automotive Systems Incorporated (Furukawa Electric Company Limited), Furukawa Electric Company Limited
• Original Assignee: Furukawa Automotive Systems Incorporated (Furukawa Electric Company Limited), Furukawa Electric Company Limited
• Inventors: Sekiya, Shigeki, Susai, Kyota
• Primary Examiner(s): ZHENG, LOIS L
• Application Number:
  US14/497,744
• Publication Number:
  US 20150007910A1
• Time in Patent Office: 886 Days
• US Class Current: 1/1
• CPC Class Codes: B21C 1/003 Drawing materials of special alloys so far as the composition of the alloy requires or permits special drawing methods or sequences
• 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 21/08 with silicon
• CPC Class Codes: C22C 21/14 with silicon
• CPC Class Codes: C22C 21/16 with magnesium
• 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 1/043 of alloys with silicon as the next major constituent
• 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: C22F 1/057 of alloys with copper as the next major constituent
• CPC Class Codes: H01B 1/023 Alloys based on aluminium

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 Mg₂Si needle precipitate in the aluminum alloy is 10 to 200/μm²; and a method of producing the same.

Claims

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 μ

m, and

wherein a dispersion density of Mg₂Si needle precipitate in the aluminum alloy is 10 to 200/μ

m².

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

22x<sup>−

0.4</sup>+500≦

y≦

18x<sup>−

0.4</sup>+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

−

8.5x+612≦

z≦

−

8.5x+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.