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A kind of composite rolling preparation method of gradient structure strip

A gradient structure and compound rolling technology, which is applied in metal rolling, metal rolling, temperature control, etc., can solve the problems of low size and efficiency, achieve good surface corrosion performance, good toughness, and improve production efficiency.

Active Publication Date: 2020-01-07
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the size and efficiency of the current development of gradient structure materials are relatively low, and there are few gradient structure strip products produced in large industries

Method used

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  • A kind of composite rolling preparation method of gradient structure strip

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preparation example Construction

[0024] refer to figure 1 , the specific steps of the preparation method of the present invention are as follows:

[0025] Step 1: Aluminum alloy, copper alloy or titanium alloy strip is used as the raw material strip 2, the thickness of the raw material strip 2 is 1mm-4mm, and the width is 100mm-1200mm.

[0026] Step 2: Take the raw material strip 2, set it in the third coiler 18, and anneal it in the heating furnace 16 to realize the coarse grain of the material, and obtain the tempered strip 17;

[0027] The third step: take the same raw material strip 2 as the material in the second step, and set the two ends on the first coiler 3 and the second coiler 13 respectively, and the first coiler 3 is located in the first cryogenic box 1 , the second coiler 13 is located in the second cryogenic box 14, all can be cooled by liquid nitrogen, through the strip 4 cryogenically treated in the first cryogenic box 1, the first guide roller 5, the second outside the cryogenic box Under ...

Embodiment 1

[0034] Example 1: Preparation of 2mm Gradient Structure Aluminum Alloy Strip

[0035] The first step: the aluminum alloy 1050 strip is used as the raw material, the thickness of the raw material is 3mm, and the width is 200mm.

[0036] The second step: select a part of annealing to prepare a coarse-grained aluminum alloy intermediate layer.

[0037] The third step: Select a part of the strip for cryogenic asynchronous rolling, the rolling speed ratio is 1.3, and the reduction rate of each pass is 20%. After 9 passes of cryogenic asynchronous rolling, a thickness of 0.4mm is prepared. ultrafine-grained strips.

[0038] Step 4: Process the ultra-fine-grained strip prepared by cryogenic rolling into a width of 200 mm.

[0039] Step 5: Place the annealed strip and the ultra-fine-grained strip prepared by cryogenic rolling on three coilers.

[0040] Step 6: Start the surface cleaning roller to decontaminate the strip surface.

[0041] Step 7: Use laser to process the surface of...

Embodiment 2

[0043] Embodiment 2: Preparation of 1.2mm gradient structure copper alloy strip

[0044] The first step: T2 copper strip is used as raw material, the thickness of the raw material is 2mm, and the width is 300mm.

[0045] The second step: select a part of annealing to prepare a coarse-grained aluminum alloy intermediate layer.

[0046] The third step: select a part of the strip for cryogenic asynchronous rolling, the rolling speed ratio is 1.2, and the reduction rate of each pass is 25%. After 8 passes of cryogenic asynchronous rolling, a thickness of 0.2mm is prepared. ultrafine-grained strips.

[0047] Step 4: Process the ultra-fine-grained strip prepared by cryogenic rolling into a width of 300 mm.

[0048] Step 5: Place the annealed strip and the ultra-fine-grained strip prepared by cryogenic rolling on three coilers.

[0049] Step 6: Start the surface cleaning roller to decontaminate the strip surface.

[0050] Step 7: Use laser to process the surface of the intermedia...

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Abstract

A compound rolling preparation method of gradient structure strip comprises following steps: first, processing the coarse-grained strip and the ultrafine-grained strip into the same width; second, arranging according to that ultrafine grain strip material / the coarse grain strip material / the ultrafine grain strip material; third, carrying out surface treatment on that coarse-grained strip to realize surface melting; fourth, rolling that three-layer composite strip to realize the welding of the ultra-fine grain strip, the coarse grain strip and the ultra-fine grain strip to form the gradient structure strip. The invention can rapidly prepare the gradient structure strip material and improve the production efficiency of the gradient structure material. The surface layer of the gradient structure strip material is of ultra-fine grain structure, and the core region is of coarse grain. Compared with the traditional cold-rolled material, the gradient structure strip material has good strengthand better plasticity.

Description

technical field [0001] The invention belongs to the technical field of metal material rolling, and relates to the rolling of metal gradient structure materials, in particular to a compound rolling preparation method of gradient structure strips. Background technique [0002] Ultrafine-grained metal materials have received extensive attention from the academic community in the past few decades, and a large number of methods have been invented to prepare and study these materials. However, the main difficulty with ultrafine-grained metallic materials is that the material has high strength but very low plasticity. In this context, improving the toughness of ultrafine-grained metallic materials has drawn great attention from academic researchers all over the world. [0003] Gradient structure materials are an important branch of the development of ultrafine-grained metal materials. It has been proved that metal gradient structure materials can have both excellent strength and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B3/00B21B1/22B21B37/74B21B37/00B21B15/00
CPCB21B1/22B21B3/00B21B15/00B21B37/00B21B37/74B21B2001/221B21B2003/001B21B2003/005
Inventor 喻海良李璟
Owner CENT SOUTH UNIV
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