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Low-pressure core filling preparation technology of copper-clad aluminum composite material

A composite material and preparation technology, applied to heat exchange equipment, rotors, cylinders, etc., can solve problems such as complex procedures, high production costs, and low product quality, and achieve simple process, low production costs, and utilization of molten aluminum high effect

Active Publication Date: 2015-11-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low-pressure core-filling preparation process for copper-clad aluminum composite materials, so as to solve the problems of high production cost, complicated process and low product quality in the existing solid-liquid phase composite method at the present stage

Method used

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  • Low-pressure core filling preparation technology of copper-clad aluminum composite material

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Experimental program
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Effect test

Embodiment 1

[0027] Step 1. Degrease and descale the inner wall of the copper tube, prepare a supersaturated potassium fluorozirconate solution and heat it to 95°C, pour it into the copper tube and let it cool for 6 minutes before pouring it out, and then put the copper tube into the drying in a drying oven;

[0028] In this process, it is necessary to control the standing time. If the standing time is too short, the deposited potassium fluorozirconate film will be uneven and incomplete, and the anti-oxidation effect will be poor; if the standing time is too long, the potassium fluorozirconate film will be too thick. Entering the copper tube, potassium fluorozirconate generates a large amount of gas when it is thermally decomposed, which may cause pore defects.

[0029] Step 2: put industrial pure aluminum into a crucible resistance furnace and melt it, the melting temperature is 740°C; put the copper tube into the resistance furnace for preheating, and the preheating temperature is 450°C....

Embodiment 2

[0038] Step 1. Degrease and descale the inner wall of the copper tube, prepare a supersaturated potassium fluorozirconate solution and heat it to 95°C, pour it into the copper tube and let it cool for 3 minutes before pouring it out, and then put the copper tube into the drying in a drying oven;

[0039] Step 2: Put industrial pure aluminum into a crucible resistance furnace and melt it, the melting temperature is 780°C; put the copper tube into the resistance furnace for preheating, and the preheating temperature is 300°C.

[0040] Step 3: Put the crucible into the low-pressure core filling machine, and connect the preheated copper tube with the low-pressure core filling machine through the asbestos sleeve insulation, and seal it.

[0041] Step 4: Open the three-way valve to fill the core with air at a rate of 300ml / min.

[0042] Step 5. Pressurize to 0.8MPa and hold the pressure until the aluminum liquid in the copper tube is completely solidified, and the holding time is 2...

Embodiment 3

[0045] Step 1. Degrease and descale the inner wall of the copper tube, prepare a supersaturated potassium fluorozirconate solution and heat it to 95°C, pour it into the copper tube and let it cool for 4 minutes before pouring it out, and then put the copper tube into the drying in a drying oven;

[0046] Step 2: put industrial pure aluminum into a crucible resistance furnace and melt it, the melting temperature is 720°C; put the copper tube into the resistance furnace for preheating, and the preheating temperature is 200°C.

[0047] Step 3: Put the crucible into the low-pressure core filling machine, and connect the preheated copper tube with the low-pressure core filling machine through the asbestos sleeve insulation, and seal it.

[0048] Step 4: Open the three-way valve to fill the core with argon gas at a rate of 450ml / min.

[0049] Step 5. Pressurize to 0.5MPa and hold the pressure until the aluminum liquid in the copper tube is completely solidified, and the holding tim...

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Abstract

The invention discloses a low-pressure core filling preparation technology of a copper-clad aluminum composite material. The low-pressure core filling preparation technology comprises the steps that degreasing and descaling are carried out on the inner wall of a copper pipe, an anti-oxidation film is prepared on the inner wall of the copper pipe, and then the copper pipe is dried; smelting is carried out to obtain molten aluminum, and the copper pipe is preheated when the smelting temperature of the molten aluminum is close to set temperature; then a crucible is put in a low-pressure core filling machine, and the copper pipe and the low-pressure core filling machine are in butt joint and are sealed; compressed gas is used for core filling, pressurization and pressure maintaining; and pressure relief is carried out after solidification, and a copper-clad aluminum bar product is taken down. According to the method, the process of the technology is simple; technological parameters are controlled easily; production efficiency is high; the occupied area is small; the production cost is low; the product quality is good; and good environmental friendliness is achieved.

Description

technical field [0001] The invention belongs to the field of new materials and relates to a production method of a copper-clad aluminum composite material. Background technique [0002] The copper-clad aluminum composite material is a bimetallic composite material that uniformly coats the copper layer on the outer surface of the aluminum core, so that the two metals of copper and aluminum form an interatomic bond at the interface to form a whole. It combines the good electrical conductivity of copper with the low cost and low density of aluminum, and has great development prospects. [0003] According to the state of the two metals before the compounding, the production methods of copper-clad aluminum composite materials can be divided into three categories as a whole: solid-solid phase compounding method, solid-liquid phase compounding method, liquid-liquid phase compounding method, among which solid -Solid-phase compounding mainly includes rolling and crimping method, hyd...

Claims

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Application Information

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IPC IPC(8): B22D19/00B22D18/04
Inventor 盛晓波张望成董寅生储成林郭超
Owner SOUTHEAST UNIV
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