Metal composite wire

Abstract

The present invention discloses a metal composite wire capable of increasing a tightness degree of copper-aluminum bonding. The metal composite wire includes a metal core rod. Continuous spiral grooves are formed in a surface of the core rod. The core rod is cladded with a metal cladding layer with higher electrical conductivity than the core rod. An average depth of the continuous spiral grooves ≤1/10 of a thickness of the metal cladding layer. By setting the thickness of the metal cladding layer as t.sub.1, a specific gravity of the metal cladding layer as ρ.sub.1, a diameter of the core rod as R, the average depth of the continuous spiral grooves as h, and a specific gravity of the core rod as ρ.sub.2, $t_1=\sqrt{\frac{{\left(R-h\right)}^2\times {\rho }_1+k\times {\left(R-h\right)}^2\times {\rho }_2-k\times {\left(R-h\right)}^2\times {\rho }_1}{\left(1-k\right)\times {\rho }_1}}+h-R,\mathrm{and}$$0.2\le k\le 0.7.$
The metal composite wire of the present invention can be widely applied to cable conductors and cable shielding braiding layers.

Claims

1. A metal composite wire, comprising a metal core rod, wherein continuous spiral grooves are formed in a surface of the core rod; the core rod is cladded with a metal cladding layer with higher electrical conductivity than the core rod; an average depth of the continuous spiral grooves ≤ 1/10 of a thickness of the metal cladding layer; and by setting the thickness of the metal cladding layer as t.sub.1, a specific gravity of the metal cladding layer as ρ.sub.1, a diameter of the core rod as R, the average depth of the continuous spiral grooves as h, and a specific gravity of the core rod as β.sub.2, $t_1=\sqrt{\frac{{\left(R-h\right)}^2\times {\rho }_1+k\times {\left(R-h\right)}^2\times {\rho }_2-k\times {\left(R-h\right)}^2\times {\rho }_1}{\left(1-k\right)\times {\rho }_1}}+h-R,\mathrm{and}$ $0.2\le k\le 0.7.$

2. The metal composite wire according to claim 1, wherein the average depth of the continuous spiral grooves is controlled between 1% to 4/25 of the thickness of the metal cladding layer.

3. The metal composite wire according to claim 2, wherein the metal cladding layer is an oxygen-free copper layer, a low-oxygen copper layer, or a copper alloy layer.

4. The metal composite wire according to claim 1, wherein the core rod is an aluminum alloy rod; and through being metered in percentage by mass, the aluminum alloy rod contains 0.02 to 0.1% of silicon, 1.15 to 1.26% of iron, 0.18 to 0.24% of copper, 0.01 to 0.03% of titanium, ≤0.0025% of magnesium, ≤0.15% of all impurity elements (≤0.01% of each single impurity element), and the balance aluminum.

5. The metal composite wire according to claim 4, wherein the metal cladding layer is an oxygen-free copper layer, a low-oxygen copper layer, or a copper alloy layer.

6. The metal composite wire according to claim 4, wherein a content of the magnesium in the aluminum alloy rod is between 0.0015 to 0.0025%.

7. The metal composite wire according to claim 6, wherein the metal cladding layer is an oxygen-free copper layer, a low-oxygen copper layer, or a copper alloy layer.

8. The metal composite wire according to claim 4, wherein one or more elements amongst the impurity elements that are selected from the group consisting of manganese, zinc, nickel, or chromium, have an individual non-zero content in the aluminum alloy rod ≤0.01% by mass.

9. The metal composite wire according to claim 8, wherein the metal cladding layer is an oxygen-free copper layer, a low-oxygen copper layer, or a copper alloy layer.

10. The metal composite wire according to claim 8, wherein through being metered in percentage by mass, a content of a manganese element ≤0.006, a content of a zinc element ≤0.008%, a content of a nickel element ≤0.006%, and a content of a chromium element ≤0.002%.

11. The metal composite wire according to claim 10, wherein the metal cladding layer is an oxygen-free copper layer, a low-oxygen copper layer, or a copper alloy layer.

12. The metal composite wire according to claim 1, wherein the metal cladding layer is an oxygen-free copper layer, a low-oxygen copper layer, or a copper alloy layer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic sectional structure diagram of a metal composite wire of the present invention.

(2) Reference numerals in FIG. 1 are as follows: 1 denotes an aluminum alloy core rod; 11 denotes a continuous spiral groove; and 2 denotes an oxygen-free copper layer.

DETAILED DESCRIPTION

(3) A specific implementation of a metal composite wire of the present invention will be described in detail by taking a copper-clad aluminum alloy as an example in conjunction with the accompanying drawings below.

(4) As shown in FIG. 1, the metal composite wire of the present invention includes an aluminum alloy core rod 1. Continuous spiral grooves 11 are formed in a surface of the aluminum alloy core rod 1. The aluminum alloy core rod 1 is cladded with an oxygen-free copper layer 2 serving as a metal cladding layer with higher electrical conductivity than the aluminum alloy core rod 1. An average depth of the continuous spiral grooves 11≤ 1/10 (10%) of a thickness of the oxygen-free copper layer 2, and is preferably controlled between 1 to8%.

(5) By setting the thickness of the oxygen-free copper layer 2 as t.sub.1, a specific gravity of the oxygen-free copper layer as pi, a diameter of the aluminum alloy core rod 1 as R, the average depth of the continuous spiral grooves 11 as h, and a specific gravity of the aluminum alloy core rod 1 as ρ.sub.2,

(6) $t_1=\sqrt{\frac{{\left(R-h\right)}^2\times {\rho }_1+k\times {\left(R-h\right)}^2\times {\rho }_2-k\times {\left(R-h\right)}^2\times {\rho }_1}{\left(1-k\right)\times {\rho }_1}}+h-R,\mathrm{and}$$0.2\le k\le 0.7.$

(7) Through being metered in percentage by mass, the aluminum alloy core rod 1 contains 0.02 to 0.1% of silicon, 1.15 to 1.26% of iron, 0.18 to 0.24% of copper, 0.01 to 0.03% of titanium, 0.0015 to 0.0025% of magnesium, ≤0.15% of all impurity elements (≤0.01% of each single impurity element), and the balance aluminum.

(8) During practical application, the impurity elements generally include manganese, zinc, nickel and chromium. A content of a manganese element ≤0.006%, a content of a zinc element ≤0.008%, a content of a nickel element ≤0.006%, and a content of a chromium element ≤0.002%. The metal cladding layer further may be a low-oxygen copper layer or a copper alloy layer.

(9) The tensile strength, elongation and electrical resistivity of the aluminum alloy core rod 1 are shown in the tables below:

(10) TABLE-US-00001 Physical performance Seri- Tensile Electrical al Num- strength Elonga- resistivity num- Batch ber of Weight (MPa) tion (%) (nΩ .Math. m) ber number pieces (Kg) (140-180) (16-25) (28-30) 1 8C93002703 1 2166 145 17 29.14 2 8C93002704 1 2260 145 19 29.31 3 8C93002705 1 2248 145 19 29.31 4 8C93002706 1 2270 145 19 29.31 5 8C93002707 1 2284 143 20 29.30 6 8C93002708 1 2268 143 20 29.30 7 8C93002709 1 2124 148 18 29.39 Total 7

(11) Through the above tables, the performance of the aluminum alloy core rod 1 completely reaches the requirements for manufacturing the composite wires such as the copper-clad aluminum alloy.

(12) The foregoing descriptions are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. All equivalent changes and modifications made according to shapes, structures, features and spirits described in the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.