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Metal sheet surface nano crystallization method using pressure sliding-rolling

A metal plate and nanotechnology, applied in the direction of nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problem of inability to ensure uniform nanotechnology and repeatability of materials, inability to prepare products with special specifications, unstable surface nanotechnology, etc. problems, to achieve the effect of continuous surface nanometerization, high production efficiency, and small energy loss

Inactive Publication Date: 2008-07-02
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the surface nanonization described by these phenomena is unstable and cannot guarantee uniform nanonization and reproducibility of materials.
Products with special specifications cannot be prepared, and it is not suitable for large-scale and large-scale continuous production

Method used

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  • Metal sheet surface nano crystallization method using pressure sliding-rolling
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  • Metal sheet surface nano crystallization method using pressure sliding-rolling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In the cold rolling mill, after the width of the roll gap is precisely adjusted by the cold rolling roll, the roll remains stationary, the cold rolling coiler is used to provide traction, and the low-temperature cooling oil is used for cooling to realize the pressure sliding rolling process. The small sample is unidirectionally rolled multiple times to achieve the effect of multi-stage rolling. After the small sample is unidirectionally rolled, the sample is turned 180 degrees for rolling to achieve the effect of bidirectional reversible rolling.

[0037] Quenched and tempered and quenched 40Cr steel plates, the specifications are: 200mm×50mm×5mm, two φ10 holes are opened at both ends of the plate to connect the traction belt, the single reduction is 50μm, and the cooling oil temperature is 5 ℃, rolling 5 times continuously. The results of the surface structure after pressure sliding rolling show that the thickness of the nano layer on the surface of the quenched and te...

Embodiment 2

[0039] Adopt the equipment and method described in embodiment 1, finely annealed state GCr15 steel, specification: 200mm * 50mm * 5mm, respectively open two φ 10 holes at both ends of the plate, in order to connect the traction belt, the single reduction is 30μm, cooling oil temperature is 25 ℃, rolling 5 times continuously.

[0040] The surface structure results after pressure sliding rolling show that the thickness of the surface nano-layer is 50 μm, and the average grain size is 45 nm, see image 3 shown.

Embodiment 3

[0042] Adopt the equipment and method described in Example 1, chromium-zirconium copper plate, specification: 200mm × 50mm × 6mm, open two φ10 holes at both ends of the plate, in order to connect the traction belt, and the single reduction is 60 μm, Air cooling, two-way rolling, rolling 6 times. The results of the surface structure after pressure sliding rolling show that the thickness of the surface nano-layer is 120 μm, and the average grain size is 80 nm.

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Abstract

The invention relates to metal plate surface nano-sizing method. It includes the following steps: pressure sliding rolling plate provides one vertical compressing stress on the metal plate surface; the former fixes while the latter moves which can generate sliding and rolling between them to make the metal plate surface happen high strain speed intense plastic deformation and form nanometer crystal surface layer. The invention can realize large mental plate surface nano-sizing, suit for large scale continuous production, and has high production efficiency.

Description

(1) Technical field [0001] The invention relates to a method for nanometerizing the surface of a metal plate, in particular to a method for realizing nanometerization of the surface structure of a metal plate by adopting a pressure sliding rolling method. (2) Background technology [0002] Due to the small grain size (usually less than 100nm in at least one dimension), high interface density and large volume fraction, nano-metallic materials exhibit unique mechanical and physical and chemical properties. A large number of experimental results show that the performance and mechanical behavior of nano-metal materials are significantly different from traditional coarse-grained materials, and are usually better than coarse-grained materials. For nano-metal materials, the strength, hardness and toughness are significantly improved compared with coarse-grained materials, but the plasticity is significantly reduced. The failure of metal materials mostly occurs on the surface of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D7/04C22F1/00B82B3/00
Inventor 张俊宝方园宋洪伟
Owner BAOSHAN IRON & STEEL CO LTD