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-9991024-B2
Application number	US-201715483013-A
Country	US
Kind code	B2
Filing date	Apr 10, 2017
Priority date	Mar 29, 2013
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

An aluminum alloy wire rod comprising 0.1-1.0 mass % Mg; 0.1-1.0 mass % Si; 0.01-1.40 mass % Fe; 0.01-0.50 mass % Zr; 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 % Hf; 0.00-0.50 mass % V; 0.00-0.50 mass % Sc; 0.00-0.50 mass % Co; and 0.00-0.50 mass % Ni, a Mg/Si ratio being greater than 1, wherein a dispersion density of an Mg 2 Si compound having a particle size of 0.5 μm to 5.0 μm is less than or equal to 3.0×10 −3 particles/μm 2 , and in the sectional structure, a concentration of each of Mg and Si other than a compound is less than or equal to 2.00 mass %.

First claim

What is claimed is:

1. An aluminum alloy wire rod having a composition comprising 0.1 mass % to 1.0 mass % Mg; 0.1 mass % to 1.0 mass % Si; 0.01 mass % to 1.40 mass % Fe; 0.01 mass % to 0.50 mass % Zr; 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 % 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; and 0.00 mass % to 0.50 mass % Ni, a Mg/Si ratio being greater than 1,
wherein a dispersion density of an Mg 2 Si compound having a particle size of 0.5 μm to 5.0 μm is less than or equal to 3.0×10 −3 particles/μm 2 , and
in a sectional structure, a concentration of each of Mg and Si other than a compound is less than or equal to 2.00 mass %.

2. The aluminum alloy wire rod according to claim 1 , wherein in the sectional structure, a concentration of each of Fe, Ti, B, Cu, Ag, Au, Mn, Cr, Zr, Hf, V, Sc, Co and Ni other than a compound is less than or equal to 1.00 mass %.

3. The aluminum alloy wire rod according to claim 1 , wherein in the sectional structure, a concentration of each of Mg, Si, Fe, Ti, B, Cu, Ag, Au, Mn, Cr, Zr, Hf, V, Sc, Co and Ni other than a compound is less than or equal to 1.00 mass %.

4. 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.

5. 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 % 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.

6. The aluminum alloy wire rod according to claim 1 , wherein the composition has a sum of contents of Fe, Ti, B, Cu, Ag, Au, Mn, Cr, Zr, Hf, V, Sc, Co, and Ni of 0.02 mass % to 2.00 mass %.

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

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

9. The aluminum alloy wire rod according to claim 1 , wherein number of cycles to fracture measured in a bending fatigue test in a constant temperature tank at a temperature of 120° C. is 400,000 cycles to 630,000 cycles.

10. 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.

11. An aluminum alloy stranded wire comprising a plurality of aluminum alloy wire rods as claimed in claim 10 which are stranded together.

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

13. A coated wire comprising a coating layer at an outer periphery of the aluminum alloy stranded wire as claimed in claim 11 .

14. 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,
the aluminum alloy wire rod having a composition comprising 0.1 mass % to 1.0 mass % Mg, 0.1 mass % to 1.0 mass % Si; 0.01 mass % to 1.40 mass % Fe; 0.01 mass % to 0.50 mass % Zr; 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 % 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; and 0.00 mass % to 0.50 mass % Ni, a Mg/Si ratio being greater than 1,
wherein
a dispersion density of an Mg 2 Si compound having a particle size of 0.5 μm to 5.0 μm is less than or equal to 3.0×10 −3 particles/μm 2 , and
in a sectional structure, a concentration of each of Mg and Si other than a compound is less than or equal to 2.00 mass %.

15. 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 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 first heat treatment process includes, after heating to a predetermined temperature within a range of 480° C. to 620° C., cooling at an average cooling rate of greater than or equal to 10° C./s at least to a temperature of 150° C., and
the second heat treatment includes, after heating to a predetermined temperature within a range of higher than or equal to 300° C. and lower than 480° C. for less than two minutes, cooling at an average cooling rate of greater than or equal to 9° C./s at least to a temperature of 150° C.

Assignees

• Furukawa Electric Co Ltd
• Furukawa Automotive Systems Inc

Inventors

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

Classifications

• B22D11/003 Primary

  Aluminium alloys · CPC title

• H01B7/0045 Primary

  Cable-harnesses · CPC title

• C22F1/057

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

• C22F1/05

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

• C22F1/047

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