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Hydrostatic extrusion preparing method of aluminum clad copper composite materials

A composite material and hydrostatic extrusion technology, which is applied in the direction of cable/conductor manufacturing, electrical components, circuits, etc., can solve the problems affecting the conductivity and application performance of aluminum-clad copper rods, poor bonding quality of copper-aluminum interface, etc., to achieve surface The effect of good quality, high bonding strength and high mechanical properties

Inactive Publication Date: 2013-06-26
厦门火炬特种金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, affected by the forming process, it is easy to cause poor bonding quality between copper and aluminum interfaces, thus affecting the conductivity and application performance of aluminum-clad copper rods and wires.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of aluminum-clad copper rods with a diameter of Φ20mm and a copper section ratio of 65%.

[0021] (1) Aluminum tubes and copper rods are used as raw materials. The aluminum tube with an outer diameter of Φ50mm and an inner diameter of 40mm is a tube blank in a hardened state with uniform and refined grains after processing by extrusion, rolling and other methods. Copper rods are extruded or wrought pure copper with a purity of more than 99%. The aluminum tube is spun out of a sealing cone with an outer taper of 60° and an inner taper of 55°, washed with 15% sodium hydroxide alkaline water for 3 to 10 minutes and dried. Put a copper rod with a diameter greater than 40mm at 700°C for 30 minutes to soften and anneal, turn it so that the outer diameter can slide and fit it into the aluminum tube, turn the head out of a 55° cone angle, use 15% dilute sulfuric acid lotion, pickle for 5 minutes to remove oxidation Leather, rinse after passivation to ensure a smoo...

Embodiment 2

[0024] size is Preparation of aluminum-clad copper wire with a copper section ratio of about 50%.

[0025] (1) Pure aluminum tubes and pure copper rods are used as raw materials. The aluminum tube with an outer diameter of Φ50mm and an inner diameter of 35mm is a tube blank in a hardened state with uniform and refined grains after processing by extrusion, rolling and other methods. Copper rods are extruded or wrought pure copper with a purity of more than 99%. The aluminum tube is spun out of a sealing cone with an outer taper of 45° and an inner taper of 40°, washed with 15% sodium hydroxide alkaline water for 3 to 10 minutes and dried. The copper rod with a diameter greater than 35mm is softened and annealed at 700°C for 30 minutes, turned so that the outer diameter can slide and fit into the aluminum tube, the head is turned out of a 40° cone angle, and 15% dilute sulfuric acid is used to pickle for 5 minutes to remove oxidation. Leather, rinse after passivation to ensu...

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PUM

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Abstract

The invention discloses a hydrostatic extrusion preparing method of aluminum clad copper composite materials. The process steps include: 1 a pure aluminum tube blank and a pure copper bar blank which are matched in hardness are obtained through combination of press working and heat treatment; 2 the aluminum tube blank and the copper bar blank are respectively subjected to press working and machining, and size matching is ensured; 3 aluminum and copper are respectively subjected to surface cleaning and are assembled to be extrusion billets; 4 the extrusion billets and an extrusion mold are subjected to surface lubricating; 5 the extrusion billets and pressure media are placed in the mold to be subjected to large working rate hydrostatic extrusion compositing to obtain aluminum clad copper bar materials; and 6 the aluminum clad copper bar materials are further processed to obtain aluminum clad copper wires. The aluminum clad copper wires and bars produced in the method have good surface quality and high combination strength and mechanical property.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of aluminum-clad copper composite materials, and in particular relates to a method for preparing aluminum-clad copper composite materials by hydrostatic extrusion. Specifically, it is a method for preparing aluminum-clad copper composite rods and wires. The interface of the processed aluminum-clad copper material achieves good solid-phase metallurgical bonding, so that the aluminum-clad copper wire has excellent electrical conductivity and process forming performance. Background technique [0002] Copper has good electrical and thermal conductivity, and is still the most important material in the fields of power transmission, signal transmission, and heat conduction. With the rapid development of economic construction, my country has become the world's largest producer of copper products and the largest importer of copper resources. It needs to import a large amount of copper resources...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00
Inventor 胡捷
Owner 厦门火炬特种金属材料有限公司
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