Aluminum alloy wire rod, aluminum alloy stranded wire, coated wire, wire harness and manufacturing method of aluminum alloy wire rod

Patent metadata

Field	Value
Publication number	US-9263168-B2
Application number	US-201514681767-A
Country	US
Kind code	B2
Filing date	Apr 8, 2015
Priority date	Mar 29, 2013
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

An aluminum alloy wire rod has a composition consisting of 0.10-1.00 mass % Mg; 0.10-1.00 mass % Si; 0.01-1.40 mass % Fe; 0.000-0.100 mass % Ti; 0.000-0.030 mass % B; 0.00-1.00 mass % Cu; 0.00-0.50 mass % Ag; 0.00-0.50 mass % Au; 0.00-1.00 mass % Mn; 0.00-1.00 mass % Cr; 0.00-0.50 mass % Zr; 0.00-0.50 mass % Hf; 0.00-0.50 mass % V; 0.00-0.50 mass % Sc; 0.00-0.50 mass % Co; 0.00-0.50 mass % Ni; and the balance being Al and incidental impurities, wherein at least one of Ti, B, Cu, Ag, Au, Mn, Cr, Zr, Hf, V, Sc, Co and Ni is contained in the composition or none of Ti, B, Cu, Ag, Au, Mn, Cr, Zr, Hf, V, Sc, Co and Ni is contained in the composition. A precipitate free zone exists inside a crystal grain, and the precipitate free zone has a width of less than or equal to 100 nm.

First claim

What is claimed is:

1. An aluminum alloy wire rod having a composition consisting of 0.10 mass % to 1.00 mass % Mg; 0.10 mass % to 1.00 mass % Si; 0.01 mass % to 1.40 mass % Fe; 0.000 mass % to 0.100 mass % Ti; 0.000 mass % to 0.030 mass % B; 0.00 mass % to 1.00 mass % Cu; 0.00 mass % to 0.50 mass % Ag; 0.00 mass % to 0.50 mass % Au; 0.00 mass % to 1.00 mass % Mn; 0.00 mass % to 1.00 mass % Cr; 0.00 mass % to 0.50 mass % Zr; 0.00 mass % to 0.50 mass % Hf; 0.00 mass % to 0.50 mass % V; 0.00 mass % to 0.50 mass % Sc; 0.00 mass % to 0.50 mass % Co; 0.00 mass % to 0.50 mass % Ni; and the balance being Al and incidental impurities,
wherein at least one of Ti, B, Cu, Ag, Au, Mn, Cr, Zr, Hf, V, Sc, Co and Ni is contained in the composition or none of Ti, B, Cu, Ag, Au, Mn, Cr, Zr, Hf, V, Sc, Co and Ni is contained in the composition,
a precipitate free zone exists inside a crystal grain, and the precipitate free zone has a width of less than or equal to 100 nm.

2. The aluminum alloy wire rod according to claim 1 , wherein the composition contains one or two element(s) selected from a group consisting of 0.001 mass % to 0.100 mass % Ti; and 0.001 mass % to 0.030 mass % B.

3. The aluminum alloy wire rod according to claim 1 , wherein the composition contains one or more element(s) selected from a group consisting of 0.01 mass % to 1.00 mass % Cu; 0.01 mass % to 0.50 mass % Ag; 0.01 mass % to 0.50 mass % Au; 0.01 mass % to 1.00 mass % Mn; 0.01 mass % to 1.00 mass % Cr; 0.01 mass % to 0.50 mass % Zr; 0.01 mass % to 0.50 mass % Hf; 0.01 mass % to 0.50 mass % V; 0.01 mass % to 0.50 mass % Sc; 0.01 mass % to 0.50 mass % Co; and 0.01 mass % to 0.50 mass % Ni.

4. The aluminum alloy wire rod according to claim 1 , wherein a sum of contents of Fe, Ti, B, Cu, Ag, Au, Mn, Cr, Zr, Hf, V, Sc, Co, and Ni is 0.01 mass % to 2.00 mass %.

5. The aluminum alloy wire rod according to claim 1 , wherein an impact absorption energy is greater than or equal to 5 J/mm 2 .

6. The aluminum alloy wire rod according to claim 1 , wherein number of cycles to fracture measured in a bending fatigue test is greater than or equal to 200,000 cycles.

7. The aluminum alloy wire rod according to claim 1 , wherein the aluminum alloy wire rod is an aluminum alloy wire having a diameter of 0.1 mm to 0.5 mm.

8. An aluminum alloy stranded wire comprising a plurality of aluminum alloy wire rods as claimed in claim 7 which are stranded together.

9. A coated wire comprising a coating layer at an outer periphery of the aluminum alloy stranded wire as claimed in claim 8 .

10. A coated wire comprising a coating layer at an outer periphery of one of the aluminum alloy wire rod as claimed in claim 7 .

11. A method of manufacturing an aluminum alloy wire rod as claimed in claim 1 , the aluminum alloy wire rod being obtained by forming a drawing stock through hot or cold working subsequent to melting and casting, and thereafter carrying out processes including a first wire drawing process, a first heat treatment process, a second wire drawing process, a second heat treatment process and an aging heat treatment process in this order,
wherein the second heat treatment process is a solution heat treatment which, after heating to a first predetermined temperature within a range of 480° C. to 620° C., cools at an average cooling rate of greater than or equal to 10° C./s, and
the annealing heat treatment includes a first annealing step of heating to a second predetermined temperature within a range of higher than or equal to 80° C. and lower than 150° C. and thereafter retaining at the second predetermined temperature, and a second annealing step of heating to a third predetermined temperature within a range of 140° C. to 250° C. and thereafter retaining at the third predetermined temperature, the third predetermine temperature being higher than the second predetermined temperature.

12. A wire harness comprising:
a coated wire including a coating layer at an outer periphery of one of an aluminum alloy wire rod and an aluminum alloy stranded wire, the aluminum alloy stranded wire comprising a plurality of the aluminum alloy wire rods which are stranded together; and
a terminal fitted at an end portion of the coated wire, the coating layer being removed from the end portion,
wherein the aluminum alloy wire rod has a composition consisting of 0.10 mass % to 1.00 mass % Mg; 0.10 mass % to 1.00 mass % Si; 0.01 mass % to 1.40 mass % Fe; 0.000 mass % to 0.100 mass % Ti; 0.000 mass % to 0.030 mass % B; 0.00 mass % to 1.00 mass % Cu; 0.00 mass % to 0.50 mass % Ag; 0.00 mass % to 0.50 mass % Au; 0.00 mass % to 1.00 mass % Mn; 0.00 mass % to 1.00 mass % Cr; 0.00 mass % to 0.50 mass % Zr; 0.00 mass % to 0.50 mass % Hf; 0.00 mass % to 0.50 mass % V; 0.00 mass % to 0.50 mass % Sc; 0.00 mass % to 0.50 mass % Co; 0.00 mass % to 0.50 mass % Ni; and the balance being Al and incidental impurities,
wherein at least one of Ti, B, Cu, Ag, Au, Mn, Cr, Zr, Hf, V, Sc, Co and Ni is contained in the composition or none of Ti, B, Cu, Ag, Au, Mn, Cr, Zr, Hf, V, Sc, Co and Ni is contained in the composition,
a precipitate free zone exists inside a crystal grain, and the precipitate free zone has a width of less than or equal to 100 nm.

Assignees

• Furukawa Electric Co Ltd
• Furukawa Automotive Sys Inc

Inventors

• Sekiya Shigeki
• Yoshida Sho
• Susai Kyota
• Mitose Kengo

Classifications

• C22F1/00

  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 title

• C22F1/05

  of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions · CPC title

• C22F1/043

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

• C22C21/04

  Modified aluminium-silicon alloys · CPC title

• C22C21/16

  with magnesium · CPC title