Modification method of improving performance of stainless steel material

A material performance, stainless steel technology, applied in metal material coating process, liquid chemical plating, coating and other directions, can solve the problems of low hardness and surface strength of stainless steel, short service life, low work efficiency, etc., to achieve low cost, Improved corrosion resistance and longer service life

Inactive Publication Date: 2020-06-09
江苏拓展新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hardness and surface strength of stainless steel are low, and the wear resistance is poor. The application conditions of the centrifugal pump are various, especially when there is a high-speed gas (including corrosive gas and non-corrosive gas) and a certain amount of dust particles. Under such harsh working conditions, the stainless steel surface is used under such harsh working conditions for a long time, not only the work efficiency is low, but also the service life is short

Method used

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Embodiment Construction

[0021] The technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] The invention provides a technical solution: the stainless steel material weighs the following raw materials according to the percentage of the total weight of the product: 67%-80% of ordinary stainless steel, 1%-3% of manganese, 1%-3% of silicon, 13%-19% of chromium, Nickel 2%-5%, molybdenum 1%-3%;

[0023] A modification method for improving the performance of stainless steel materials, comprising the following steps:

[0024] (1) Pre-treat the test piece, place the test piece in clarified lime water at 30°C, the mass ratio o...

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PUM

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Abstract

The invention provides a modification method of improving the performance of stainless steel material. The treatment process is simple and effective, nitriding and oxidation treatment is carried out on the surface of the stainless steel material, and a compact compound layer with sufficient depth and a diffusion layer with corresponding length are formed on the surface of a workpiece, so that thewear resistance, corrosion resistance and fatigue resistance of the metal surface are greatly improved; a black oxidation film is formed on the surface of the workpiece to improve the antirust performance of the workpiece, and the workpiece appearance can be beautified; in addition, the compound layer can be oxidized to increase oxygen content of the compound layer so as to passivate the compoundlayer, so that the corrosion resistance is greatly improved, the energy consumption is reduced, and the service life of a product is prolonged; and the technology is simple, the cost is low, and the treatment technology including high-frequency quenching, carburizing and quenching, hard chrome plating, ion nitriding and the like can be substantially replaced.

Description

technical field [0001] The invention relates to the technical field of stainless steel materials, in particular to a modification method for improving the performance of stainless steel materials. Background technique [0002] At present, the commonly used surface treatment methods for stainless steel materials include high-frequency quenching, carburizing and quenching, hard chromium plating and ion nitriding, and the use of chromium plating, nickel plating, galvanizing, phosphating and other technologies to resist corrosion, which is costly and wear-resistant. , The effect of corrosion resistance and fatigue strength is not obvious. The general QPQ technology has great limitations in application. The reason is that the depth of the compound layer is too shallow to bear heavy loads, high-speed loads, and large wear. If the compound layer depth is doubled, the wear resistance of the infiltrated layer will also be improved accordingly. As we all know, stainless steel has goo...

Claims

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Application Information

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IPC IPC(8): C23C8/02C23C8/58C23C18/36
CPCC23C8/02C23C8/58C23C18/1692C23C18/36
Inventor 尤迎军
Owner 江苏拓展新材料科技有限公司
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