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A kind of production method of ultra-thin nickel composite copper strip

A manufacturing method and technology for copper strips, applied in the field of strip rolling, can solve the problems of delamination of base material and cladding material, failure of rolling composite process, low reliability of base material and cladding material, etc.

Active Publication Date: 2015-12-09
深圳市中金岭南鑫越新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the shortcoming that this electroplating nickel or electroless nickel exists is: (1) the reliability of the base material and cladding material of nickel-plated copper strip is not high, and the instability of electroplating or electroless plating process easily causes the gap between base material and cladding material. delamination
(2) There are serious environmental pollution problems in the process of electroplating or chemical plating
The inventor thinks that: to solve the problem that the rolling and compounding process cannot be carried out normally due to the too thin initial nickel layer, it is necessary to carry out multiple rolling and compounding of the thicker nickel strip and the copper strip which accounts for a large proportion of the total thickness , that is, the thicker nickel layer and multi-layer copper strip must be hot-rolled and combined, and the technical bottleneck in this process lies in how to eliminate the interface between the various copper layers, that is, how to prepare dense and integrated copper strips. layer structure, which is an unresolved problem in the prior art

Method used

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  • A kind of production method of ultra-thin nickel composite copper strip

Examples

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Effect test

Embodiment 1

[0053] In the present embodiment, the ultra-thin nickel composite copper strip is prepared as figure 1 Shown, the production and manufacturing method of this ultra-thin nickel composite copper strip comprises the following operations:

[0054] (1) Composite a pure copper strip 3 with a thickness of 4mm and a coil of pure nickel strip 2 with a thickness of 0.8mm. During the composite process, ammonia decomposition protection is applied. The rolling temperature is 600°C, and the rolling deformation rate is 50%. Finally, a nickel-composite copper strip 1 with a thickness of about 2.4mm can be obtained, and the nickel layer accounts for about 19% of the total thickness at this time;

[0055] The nickel-composite copper strip 1 is subjected to continuous softening annealing treatment, the annealing temperature is 925° C., the annealing speed is 1 m / min, and ammonia decomposition gas is passed through for protection.

[0056] The nickel-composite copper is cold-rolled from 2.4 mm t...

Embodiment 2

[0064] A kind of production method of ultra-thin nickel composite pure described in the present embodiment, comprises the following steps:

[0065] (1) A 2mm-thick pure copper strip and a 0.5mm-thick pure nickel strip are rolled and compounded at 250°C and an ammonia decomposition gas atmosphere to prepare a 1.5mm thick nickel-clad copper strip. The rolling deformation rate is 40%, the thickness ratio of the nickel layer in the nickel-clad copper strip after rolling and cladding is 20%;

[0066] Carrying out continuous softening annealing treatment to the nickel-composite copper strip, the softening annealing treatment is carried out in a hydrogen atmosphere, the temperature is 750°C, and the annealing speed is 1 m / min;

[0067] Place the copper layer of the nickel-clad copper strip that has been softened and annealed in contact with a 2mm copper strip, and perform rolling and compounding at 250°C under an ammonia decomposition gas atmosphere to obtain a nickel-clad copper str...

Embodiment 3

[0075] A kind of production method of ultra-thin nickel composite copper strip described in the present embodiment, comprises following operation:

[0076] (1) A 4mm thick pure copper strip and a 0.5mm thick pure nickel strip are rolled and composited at 600°C and an ammonia decomposition gas atmosphere to prepare a 2.25mm thick nickel-clad copper strip with a rolling deformation rate of 50%. , the thickness ratio of the nickel layer in the nickel-clad copper strip after rolling and cladding is 12%;

[0077] The 2.25mm thick nickel composite copper strip is subjected to continuous softening annealing treatment, the temperature of the softening annealing treatment is 950°C, and the annealing speed is 1.2 m / min; the 2.25mm thick nickel composite copper strip is rolled to thickness It is 0.9mm, and the rolling total deformation rate of rolling is 60%; Carry out softening annealing treatment after rolling, the temperature of described softening annealing treatment is 950 ℃, and an...

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Abstract

The invention relates to a production method of an ultrathin nickel and copper composite strip. The production method is characterized in that in order to realize more than twice continuous rolling compounding of an ultrathin coating structure, the splitting multi-time compositing design is carried out for a final copper layer occupying a majority of thickness ratio, the ratio of the thickness of each constitute strip material in every compositing step is controlled within the range of 1:1 to 1:5, and the compositing effect can be guaranteed without adopting the thin constitute strip material in the compositing process. Meanwhile, through the copper-copper continuous dispersion annealing step after the composition, a compact sintered integrated copper layer can be formed between two adjacent copper layers after being composited.

Description

technical field [0001] The invention belongs to the field of strip rolling, and in particular relates to a method for producing ultra-thin nickel-composite copper strips. Background technique [0002] In the field of power and high-rate lithium batteries, electronic and electrical products, it is often desirable to use high-conductivity double-sided or single-sided copper strips with ultra-thin nickel layers. This nickel-composited copper strip is usually made of 80% thickness. More than 8% of the copper layer and less than 8% of the nickel layer. Copper metal has excellent electrical conductivity, while nickel has excellent heat resistance, wear resistance, and corrosion resistance. A layer of ultra-thin nickel metal is compounded on the surface of the copper strip to ensure the electrical conductivity of the strip and at the same time It can also achieve excellent surface corrosion resistance, that is, the conductivity of the strip is close to that of pure copper and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/10B32B15/01B21B1/22B21B1/40C21D8/02
Inventor 徐卓辉肖昌鹏覃超
Owner 深圳市中金岭南鑫越新材料有限公司
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