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A preparation process of copper-zinc-aluminum three-layer composite wire

A preparation process, copper-zinc-aluminum technology, applied in the manufacture of wire harnesses, extensible conductors/cables, etc., can solve the problems of reduced bonding strength of copper-clad aluminum wires, difficulty in automated production, inconvenient operation and maintenance, etc. The effect of increased density, large deformation and high temperature

Active Publication Date: 2017-11-10
SUZHOU CHUANGHAO NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also temperature control systems and heating systems in their respective molten pools. After leaving the crystallizer, a secondary cooling water system is also required to ensure the solidification of the inner and outer metal layers. The final continuous casting is a composite billet, but In order to achieve continuous production, this method requires a complex crimping mechanism, complex equipment is not easy to operate and maintain, and it is difficult to realize automatic production
At the same time, since copper and aluminum are combined by this method, aluminum is in a liquid phase, and because the temperature of the aluminum liquid is relatively high, exceeding the eutectic temperature (549°C) of the copper-aluminum binary alloy, it is easy to form an intermetallic compound θ phase. The reason is the same as the above The cladding welding method is basically the same, so the bonding strength of the copper-clad aluminum wire produced by this process is reduced, and the copper and aluminum are easily delaminated during rolling, which affects the conductive effect

Method used

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  • A preparation process of copper-zinc-aluminum three-layer composite wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A copper-zinc-aluminum three-layer composite wire with a diameter of 3 mm and a cladding wall thickness of 10% was prepared.

[0037] Specific steps are as follows:

[0038]Step 1: Put the copper pipes that have been polished on the inner and outer surfaces into a tank filled with liquid zinc, and perform hot-dip galvanization on the inner and outer surfaces. The outer diameter of the copper pipe is 100mm, the wall thickness is 8mm, and the length of the copper pipe is 300mm. The galvanizing temperature is 480°C, and the thickness of the galvanizing layer is 15 μm;

[0039] Step 2: Insert the first aluminum rod that has been polished on the outer surface into the hot-dip galvanized copper tube. The length of the first aluminum rod blank is the same as that of the copper tube, and the gap between the galvanized copper tube and the aluminum rod is between 0.8mm , Use a pipe drawing machine to draw the galvanized copper pipe and aluminum rod until they are bonded together...

Embodiment 2

[0044] A copper-zinc-aluminum three-layer composite wire with a diameter of 2 mm and a cladding wall thickness of 15% was prepared.

[0045] Concrete steps of the present invention are as follows:

[0046] Step 1: Put the copper tubes that have been polished on the inner and outer surfaces into a tank filled with liquid zinc, and then hot-dip galvanize the inner and outer surfaces. The outer diameter of the copper tube is 200mm, the wall thickness is 10mm, the length of the copper tube is 600mm, and the The galvanizing temperature is 500℃, and the thickness of the galvanizing layer is 30μm;

[0047] Step 2: Insert the first aluminum rod that has been polished on the outer surface into the hot-dip galvanized copper tube. The length of the first aluminum rod is the same as that of the copper tube. The gap between the galvanized copper tube and the first aluminum rod is 1.2mm During the period, the galvanized copper pipe and the first aluminum rod are drawn with a pipe drawing m...

Embodiment 3

[0052] A copper-zinc-aluminum three-layer composite wire with a diameter of 1 mm and a cladding wall thickness of 20% was prepared.

[0053] Concrete steps of the present invention are as follows:

[0054] Step 1: Put the copper pipes that have been polished on the inner and outer surfaces into a tank filled with liquid zinc, and perform hot-dip galvanization on the inner and outer surfaces. The outer diameter of the copper pipe is 250mm, the wall thickness is 15mm, the length of the copper pipe is 750mm, The galvanizing temperature is 520℃, and the thickness of the galvanizing layer is 30μm;

[0055] Step 2: insert the first aluminum rod that has been polished on the outer surface into the copper tube after hot-dip galvanizing, the length of the first aluminum rod is the same as that of the copper tube, and the gap between the galvanized copper tube and the first aluminum rod is at Between 1.5mm, the galvanized copper pipe and the first aluminum rod are drawn with a pipe dra...

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Abstract

The invention discloses a preparation technology of a copper-zinc-aluminum three-layer composite wire. The preparation technology comprises the following steps: (1) firstly, galvanizing a copper tube to obtain a galvanized copper tube; (2) inserting a first aluminum bar into the galvanized copper tube and carrying out drawing by a tube drawing machine until the first aluminum bar and the galvanized copper tube are laminated to obtain a composite rough blank; (3) carrying out thermal extrusion on the composite rough blank by an extruding machine to extrude a copper-zinc-aluminum three-layer composite tube blank; (4) inserting a second aluminum bar into the copper-zinc-aluminum three-layer composite tube blank, drawing the copper-zinc-aluminum three-layer composite tube blank and the second aluminum bar by the tube drawing machine until the copper-zinc-aluminum three-layer composite tube blank and the second aluminum bar are laminated to obtain a composite semi-finished product; and (5) putting the composite semi-finished product into a resistance furnace for heating, and finally, directly rolling the heated composite semi-finished product into the composite wire through a continuous mill. The obtained composite wire is good in surface quality; no brittle phase is generated among the three metals; the junction surface is high in strength; the stratification phenomenon is avoided after rolling; and the used production equipment is simple, high in flexibility and low in cost.

Description

technical field [0001] The invention relates to the field of composite material preparation, in particular to a preparation process for a copper-zinc-aluminum three-layer composite wire. Background technique [0002] Copper has a low resistance, second only to gold and silver, and is easy to bend and not easily oxidized. It is an ideal material for wires and cables, and the demand is huge. Copper resources are scarce in my country. Therefore, the use of composite materials to prepare conductors to reduce the consumption of copper resources has broad prospects and development space. At present, copper-clad aluminum composite conductors are commonly used. Copper-clad aluminum composite wire is a metal layered composite material, which is a bimetallic composite wire coated with a layer of copper on the aluminum core. It is mainly used for high-frequency information transmission, such as the inner wire of the coaxial cable for mobile communication signals, and some military use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/008H01B13/012
CPCH01B13/008H01B13/012
Inventor 梁贺穆开洪
Owner SUZHOU CHUANGHAO NEW MATERIAL TECH CO LTD
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