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Method for preparing high-performance composite strip through pulse current asymmetrical rolling

A technology of composite strip and pulse current, applied in the direction of metal rolling, etc., can solve the problems of difference, the interface bonding quality of metal composite plate is difficult to control, etc.

Active Publication Date: 2018-06-08
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rolling cladding is a commonly used method. Generally, there are hot rolling cladding method and cold rolling cladding method. It is relatively difficult to control the interface bonding quality of metal clad plates prepared by these two methods. Such products can only meet the low-end market. The main reason is that the interface of these products is a combination of mechanical welding and metallurgical welding, and there is still a big difference between its strength and complete metallurgical bonding.

Method used

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  • Method for preparing high-performance composite strip through pulse current asymmetrical rolling
  • Method for preparing high-performance composite strip through pulse current asymmetrical rolling
  • Method for preparing high-performance composite strip through pulse current asymmetrical rolling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Preparation of copper-aluminum composite strip, reference figure 1 .

[0023] The first step: take strip A1 and strip B2 as raw materials, strip A1 is copper strip, strip B2 is aluminum strip. The thicknesses of strip A1 and strip B2 before rolling were each 2 mm. The strips A1 and B2 were processed to have exactly the same dimensions of 1 m (length) x 0.2 m (width).

[0024] Step 2: Use a wire brush for surface treatment on strip A1 and strip B2 to remove surface oxides.

[0025] The third step: stacking the surface-treated surfaces of the strip A1 and the strip B2, wherein the surface-treated surfaces are opposite to each other, to obtain the A / B composite strip 3 .

[0026] The fourth step: at the rolling entrance, the pulse current device 4 is used to apply a pulse current to the A / B composite strip 3, so that discharge occurs in a local area on the surface of the material, and the surface metal is melted. During the rolling process, the pulse current...

Embodiment 2

[0030] Example 2: Preparation of titanium-aluminum composite strip, reference figure 1 .

[0031] The first step: take strip A1 and strip B2 as raw materials, strip A1 is a titanium strip, and strip B2 is an aluminum strip. The thicknesses of strip A1 and strip B2 before rolling were each 1.5 mm. The strip A1 and the strip B2 were processed to the exact same dimensions of 0.5 m (length) x 0.1 m (width).

[0032] Step 2: Use a wire brush for surface treatment on strip A1 and strip B2 to remove surface oxides.

[0033] The third step: stacking the surface-treated surfaces of the strip A1 and the strip B2, wherein the surface-treated surfaces are opposite to each other, to obtain the A / B composite strip 3 .

[0034] The fourth step: at the rolling entrance, the pulse current device 4 is used to apply a pulse current to the A / B composite strip 3, so that discharge occurs in a local area on the surface of the material, and the surface metal is melted. The pulse current power wa...

Embodiment 3

[0038] Example 3: Welding of the interface between ordinary carbon steel and ordinary carbon steel by pulse current plastic deformation

[0039] In order to verify the above method, a thermal simulation testing machine was used to conduct the experiment. The ordinary carbon steel was used as the raw material, the strip thickness was 4mm and 4mm, the pulse current power was 90KVA, and the reduction rate was 50%. The composite interface is fully metallurgically welded without any residual voids. like figure 2 Under the action of pulse current, part of the interface area is welded. image 3 The interface achieved complete metallurgical bonding after the application of a 50% reduction ratio after the action of the indicated pulse current.

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Abstract

The invention relates to a method for preparing a high-performance composite strip through pulse current asymmetrical rolling. The method comprises the steps that surfaces, subjected to surface treatment, of a strip A and a strip B are stacked, wherein the surfaces subjected to surface treatment are opposite to each other; at a rolling inlet, pulse current is applied to an A / B composite strip, thelocal area of the material surface is subjected to discharging, and surface metal is melted; the A / B composite strip obtained after pulse current treatment is subjected to asymmetrical rolling, material interface seaming is conducted, the differential speed ratio range is adjusted, and uniform deformation of the strip A and the strip B is achieved; the step is repeated 2-3 times; the obtained A / Bcomposite strip is subjected to asymmetrical rolling till the total reduction rate of the strip reaches 85%-90%. According to the composite metal material prepared through the method, the interface bonding quality is greatly improved compared with the interface of the composite metal material prepared through a traditional rolling method, and the high-performance composite metal strip can be usedfor the fields of bulletproof protection, aerospace, sound insulation and noise reduction, automobile weight lightening and the like.

Description

technical field [0001] The invention belongs to the technical field of metal composite material rolling, in particular to a method for preparing high-performance composite strips by pulse current asynchronous rolling. Background technique [0002] High-performance layered metal composite materials have always been highly concerned by domestic and foreign counterparts in this field, and they have broad application prospects in the fields of bulletproof protection, aerospace, sound insulation and noise reduction, and automotive lightweighting. The interfacial welding of layered composites during plastic deformation determines the mechanical and corrosion properties of the product. [0003] The traditional metal layered composite panel generally adopts the explosion method. However, the material interface quality is difficult to control. At the same time, this process is only suitable for the preparation of extra-thick composite panels. With the increasing demands for reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B9/00
CPCB21B1/38B21B9/00
Inventor 喻海良崔晓辉王青山
Owner CENT SOUTH UNIV
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