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Rolling method for applying pulse current to rollers

A technology of applying pulse and pulse current, which is applied in metal rolling and other directions, can solve problems such as difficulty in meeting the requirements of new products, and achieve the effects of facilitating recovery and recrystallization, suppressing edge cracks, and improving diffusion capacity

Inactive Publication Date: 2018-07-31
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] With the rapid development of the plate industry and the changes in the market consumption structure, new consumption areas have increasingly higher requirements for the bonding strength of metal composite plates, which makes it difficult for the original rolling equipment and technology to meet the requirements of new products

Method used

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  • Rolling method for applying pulse current to rollers
  • Rolling method for applying pulse current to rollers
  • Rolling method for applying pulse current to rollers

Examples

Experimental program
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Effect test

Embodiment

[0036] Taking copper / aluminum bimetal sheet as an example, its preparation method is as follows:

[0037] The material selection is an industrial pure copper plate with a size of 200mm×50mm×2mm and a pure aluminum plate with a size of 200mm×50mm×8mm. The pure copper plate and pure aluminum plate are ground and polished, and the surface of the plate is cleaned with acetone;

[0038] Rolling is carried out on a two-roll mill with equal roll speed and equal roll diameter (roll length 350mm, roll diameter 320mm).

[0039] Turn on the pulse power supply 5, and the pulse peak current density is 150A / mm when applied to the bimetal plate processing section 2 , The pulse interval time is 10s.

[0040] Start the rolling mill, the rolling speed is 0.1m / s, and the slab is sent into the middle of the rotating rolls with a push plate.

[0041] figure 1 Shown is a schematic diagram of the implementation of the current circuit. The positive and negative poles of the pulse power supply 5 ar...

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Abstract

The invention belongs to the technical field of double metal composite material rolling, and in particular to a method for improving the bonding strength of double metal composite boards through applying pulse current to upper and lower rollers in the rolling process. The method comprises the main steps of treatment of coating layer metal and base layer metal before rolling, communication of the pulse current to the upper roller or the lower roller and startup of a rolling mill for rolling. The rolling method for applying the pulse current to the rollers is to add a pulse power supply in the rolling process; and the pulse current output by positive and negative poles of the pulse power supply flows through the rollers and the boards through different modes to form a closed loop. The rolling method has the beneficial effects of acceleration of the element dispersion of the coating layer metal and the base layer metal, improvement of the dispersion efficiency, reduction of the rolling force, improvement of the bonding strength and improvement of the rolling production efficiency.

Description

technical field [0001] The invention belongs to the technical field of bimetal composite material rolling, and in particular relates to a method for applying pulse current to rolls during rolling to improve the bonding strength of composite plates. Background technique [0002] With the rapid development of modern science and technology, people's requirements for the performance of materials are getting higher and higher, and the requirements for improving the structural efficiency of materials are also becoming stronger and stronger. In most cases, it is difficult to use a single metal material to meet the performance and cost requirements of engineering structures. Therefore, a new type of composite material that integrates the physical, chemical, mechanical properties and price differences of different materials has emerged, which will effectively use the excellent characteristics of the material, overcome and make up for the lack of performance of a single material, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B9/00
CPCB21B1/38B21B9/00B21B2001/386
Inventor 黄庆学王涛高翔宇冯光韩建超和东平
Owner TAIYUAN UNIV OF TECH
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