Metal sheet surface strengthening process

Abstract

The invention relates to a metal sheet surface strengthening process which includes the specific steps: firstly, rolling and plastically deforming raw materials through a roller of a rolling mill, enabling the raw materials to enter a working area of second guide rails and a first bending roller under the action of first guide rails and performing first bending deformation; secondly, performing second bending reaction under the action of third guide rails and a second bending roller; thirdly, enabling the raw materials to pass a working area of fourth guide rails and a third bending roller; leading the raw materials into a straightening machine for straightening through fifth guide rails to finish working. The strength (or hardness) of the upper surface and the lower surface of a metal sheet can be effectively improved. By the aid of a subsequent heat treatment process, the structure property of the metal sheet is further improved by controlling phase control, so that the surface of the metal sheet is strengthened.

Description

technical field [0001] The invention relates to a metal plate strengthening method, in particular to a process for strengthening the outer surface of the metal plate to have higher strength, hardness and wear resistance. technical background [0002] In recent years, with the rapid development of the international economy, the demand for metals is increasing. While people's total demand for metals increases, the demand for some high-performance metals also increases. Especially some cheap, high-performance metals are strongly pursued by the industry. At present, there are also some methods to improve the strength of the metal surface and increase the wear resistance, such as shot peening, nitriding and other processes. However, the treatment of thin-plate workpieces by shot peening is easy to deform the workpiece. For workpieces with oil stains, shot peening cannot completely remove oil stains; Disadvantages such as high strength further limit its scope of application. T...

AI Technical Summary

Problems solved by technology

However, the treatment of thin-plate workpieces by shot peening is easy to deform the workpiece. For workpieces with oil stains, shot peening cannot completely remove oil stains; Disadvantages such as high strength further limit its scope of application

The nitriding process is prone to low hardness, uneven hardness and permeated layer, excessive deformation, poor appearance quality, vein-like nitride, complex production process, narrow metal application range, etc., which also greatly restricts its application.

Severe plastic deformation methods such as ECAP, HPT and other processes can also repeatedly squeeze or twist the metal, thereby accumulating a large amount of strain, which can effectively refine the grains inside the bulk material, and prepare a bulk ultrafine-grained material but Usually the size of the prepared sample is small, it is difficult to realize continuous production

Generally speaking, these processes have complex production structures, high production costs, and the difficulty of industrial production has become their fatal flaw.

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