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Preparation method of oxygen-free copper and aluminum composite metal plate strip

A metal strip and composite technology, applied in the direction of metal rolling, cleaning methods and appliances, chemical instruments and methods, etc., can solve the problems affecting the removal of oxide layer, insufficient grinding, and difficulty in ensuring the oxide layer on the surface of copper strip, etc., to achieve Improve the surface activation energy, reduce site occupation, and improve the binding force between metal molecules

Inactive Publication Date: 2022-07-29
正益科技(东莞)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing problems in the prior art are as follows: 1. Alkaline washing, degreasing and polishing need to use two processes, and after alkali washing, drying, cleaning, drying, and polishing are required, and the procedures are cumbersome; 2. The grinding roller is mechanically polished on one side, which may cause Due to the wear of the grinding roller, there is a problem of missing or insufficient grinding, and it is difficult to ensure that the surface of the copper strip is completely free of oxide layer, which affects the removal of the oxide layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of oxygen-free copper and aluminum composite metal plate and strip comprises the following steps:

[0022] S1, let stand, let the aluminum liquid with a temperature of 760 ° C stand for 12 minutes;

[0023] S2, casting, pour the molten aluminum that has been left standing in S1 into the casting nozzle, and wait for the molten aluminum to be cooled and crystallized to a semi-melted and semi-solid state to obtain a semi-solid molten aluminum;

[0024] S3, the copper strip is pretreated, and the 2.5mm copper strip is put into a protective gas environment. In this embodiment, the protective gas is nitrogen, and laser cleaning is performed. Copper tape free of grease and oxide layers;

[0025] S4, heating the copper strip, heating the copper strip without grease and oxide layer obtained in S3 directly to 280°C online, and both S3 and S4 are carried out in the same protective gas environment;

[0026] S5, making a billet, contacting the copper strip h...

Embodiment 2

[0029] The preparation method of oxygen-free copper and aluminum composite metal plate and strip comprises the following steps:

[0030] S1, let stand, let the aluminum liquid with a temperature of 850 ° C stand for 18 minutes;

[0031] S2, casting, pour the molten aluminum that has been left standing in S1 into the casting nozzle, and wait for the molten aluminum to be cooled and crystallized to a semi-melted and semi-solid state to obtain a semi-solid molten aluminum;

[0032] S3, the copper strip is pretreated, and the 4mm copper strip is placed in a protective gas environment. In this embodiment, the protective gas is nitrogen, and laser cleaning is performed. Copper tape for grease and oxide layers;

[0033] S4, heating the copper strip, heating the copper strip without grease and oxide layer obtained in S3 directly to 350°C online, and both S3 and S4 are carried out in the same protective gas environment;

[0034] S5, making a billet, contacting the copper strip heated...

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Abstract

The invention relates to a preparation method of an oxygen-free copper and aluminum composite metal plate strip in the field of copper and aluminum composite materials, and adopts a laser high-temperature cleaning technology to completely remove an oxide layer on the surface layer of the material, so that the copper and aluminum composite interface combination is facilitated, and the interface strength of a finished product is ensured. The copper strip is preheated before being compounded, the surface activation energy of the copper strip can be improved, the copper strip can be prevented from being oxidized again through the shielding gas, and the interface bonding strength in the copper-aluminum compounding process can be improved. Rolling in the oxygen-free environment can prevent interface oxidation in the rolling process from affecting the interface strength. The rolling pressure, the rolling speed and the rolling tension within the parameter range required by the invention can ensure that the interface composite bonding strength is greater than the strength of the aluminum material, only the aluminum material is fractured during interface shearing, and interface separation is avoided.

Description

technical field [0001] The invention relates to the field of copper-aluminum composite materials, in particular to a preparation method of an oxygen-free copper-aluminum composite metal strip. Background technique [0002] The Chinese patent with publication number CN101758071B discloses a production method of aluminum and copper composite metal strips. The method is to perform oxygen-free continuous casting and rolling of semi-solid aluminum or aluminum alloy and solid copper strips to obtain aluminum and copper composites Sheet metal strip. [0003] The problems existing in the prior art are: 1. Alkali degreasing and polishing need to use two procedures, and after alkali cleaning, drying, cleaning, drying and polishing are required, and the procedures are cumbersome; 2. The grinding roller is mechanically polished on one side, which may cause Because the grinding roller is worn, there is the problem of missing or insufficient grinding, and it is difficult to ensure that t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/22B21B1/46B08B7/00
CPCB21B1/46B21B1/22B08B7/0042
Inventor 简伟民
Owner 正益科技(东莞)有限公司
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