ALUMINUM ALLOY CONDUCTOR

• US 20140020796A1
• Filed: 09/26/2013
• Published: 01/23/2014
• Est. Priority Date: 03/31/2011
• Status: Abandoned Application

• 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
• Application Number:
  US14/037,869
• Publication Number:
  US 20140020796A1
• Time in Patent Office: Days
• US Class Current: 148/550
• 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 21/12 with copper as the next major constituent
• CPC Class Codes: C22C 21/14 with silicon
• CPC Class Codes: C22C 21/16 with magnesium
• CPC Class Codes: C22F 1/04 of aluminium or alloys based thereon
• CPC Class Codes: H01B 1/023 Alloys based on aluminium
• CPC Class Codes: H01B 5/02 Single bars, rods, wires, or strips

Abstract

An aluminum alloy conductor, which has a texture in which an area ratio of grains each having a (100) plane and being positioned in parallel to a cross-section vertical to a wire-drawing direction of a wire is 20% or more, and which has a grain size of 1 to 30 μm on the cross-section vertical to the wire-drawing direction of the wire.

Claims

1. An aluminum alloy conductor, which has an alloy composition, consisting of Fe:

0.01 to 0.4 mass %, Mg;

0.04 to 0.3 mass %, Si;

0.02 to 0.3 mass %, and Cu;

0.1 to 0.5 mass %, with the balance being Al and inevitable impurities,

wherein the aluminum alloy conductor has a texture in which an area ratio of grains each having a (100) plane and being positioned in parallel to a cross-section vertical to a wire-drawing direction of a wire is 20% or more, and

wherein the aluminum alloy conductor has a grain size of 1 to 30 μ

m on the cross-section vertical to the wire-drawing direction of the wire.

2. The aluminum alloy conductor according to claim 1, wherein 0.2% proof stress in a tensile test measured in a longitudinal direction of the conductor is 35 to 80 MPa.

3. The aluminum alloy conductor according to claim 1,

wherein the area ratio of the grains each having a (100) plane and being positioned in parallel to the cross-section vertical to the wire-drawing direction of the wire is 20% or more, in a region located within ⅔

of a radius from the center of a circle in the cross-section vertical to the wire-drawing direction of the wire, and

wherein the area ratio of the grains each having a (100) plane and being positioned in parallel to the cross-section vertical to the wire-drawing direction of the wire is 20% or more, in a region located inward by ⅓

in a radius direction from the periphery of the circle in the cross-section vertical to the wire-drawing direction of the wire.

4. The aluminum alloy conductor according to claim 3, wherein 0.2% proof stress in a tensile test measured in a longitudinal direction of the conductor is 35 to 80 MPa.

5. A conductor wire for a battery cable, a harness, or a motor, in a movable body, comprising the aluminum alloy conductor according to claim 1.

6. The conductor wire according to claim 5, wherein the movable body is an automobile, a train, or an aircraft.

7. A method of producing an aluminum alloy conductor according to claim 1, having the steps of:

melting;

casting;

hot- or cold-working to form a roughly-draw wire;

first wire-drawing;

intermediate heat-treatment;

second wire-drawing; and

final heat-treatment,

wherein the intermediate heat-treatment is carried out at a temperature of 230 to 290°

C. for 1 to 10 hours,

wherein the second wire-drawing is carried out at a working ratio of 10 to 30%, and

wherein the final heat-treatment is either;

[1] a continuous electric heat treatment, and the following formulas are satisfied;

0.03≦

x≦

0.55, and

26x<sup>−

0.6</sup>+377≦

y≦

23.5x<sup>−

0.6</sup>+423,

in which an identical value is inserted for x on the left-hand side and the right-hand side, and

in which x represents an annealing time period (seconds), and y represents a wire temperature (°

C.);

or

[2] a continuous running heat treatment, and the following formulas are satisfied;

1.5≦

x≦

5, and

−

50x+550≦

z≦

−

36x+650,

in which an identical value is inserted for x on the left-hand side and the right-hand side, and

in which x represents an annealing time period (seconds), and z represents an annealing furnace temperature (°

C.).