Method for coating high-temperature corrosion and wear resistant coating layer on surface of steel material

A surface coating and wear-resistant coating technology, applied in metal material coating process, coating, fusion spraying and other directions, can solve the problems of high cost, poor toughness, limited effect, etc., and achieve good adhesion and good bonding Strength, the effect of improving corrosion resistance

Inactive Publication Date: 2014-12-17
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of surface hardening to improve wear resistance is limited, the toughness of steel is poor after alloying, and the method of depositing a hard film on the surface is generally thinner and more costly

Method used

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  • Method for coating high-temperature corrosion and wear resistant coating layer on surface of steel material
  • Method for coating high-temperature corrosion and wear resistant coating layer on surface of steel material
  • Method for coating high-temperature corrosion and wear resistant coating layer on surface of steel material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The first step: choose 200mm×200mm×2mm Q235 steel plate as the base material, clean the surface to be sprayed, use grinding or milling to remove rust spots and sundries, and use acetone to remove surface grease.

[0041] Step 2: Use a sandblasting machine to perform sandblasting on the cleaned surface. The sand is 30 mesh alumina, and then remove the remaining sand on the surface.

[0042] Step 3: Fix the sandblasted steel plate on the fixture. Before spraying, move the spray gun to preheat the surface of the steel plate. The preheating temperature is 200°C. The Cr2C3-25Ni20Cr powder material is sprayed onto the surface of the steel plate to be protected by the method of high-speed flame spraying, and the particle size of the powder is 45 mesh. The control range of spraying process parameters is as follows;

[0043] 1) Oxygen flow: 800 L / min;

[0044] 2) Carrier gas flow: 2×8L / min;

[0045] 3) Fuel flow: 20 L / h;

[0046] 4) The combustion chamber pressure is: 0.8MPa...

Embodiment 2

[0051] The first step: choose the diameter The 316 round steel rod is used as the base material, and the surface to be sprayed is cleaned by grinding and turning to remove rust spots and debris, and the surface grease is removed with acetone.

[0052] Step 2: Use a sandblasting machine to perform sandblasting on the cleaned surface. The sand is 30 mesh alumina, and then remove the remaining sand on the surface.

[0053] Step 3: Fix the sandblasted round steel on a specific fixture. Before spraying, rotate the round steel and move the spray gun to preheat the surface of the round steel. The preheating temperature is 200°C. The Cr2C3-50Ni20Cr powder material is sprayed onto the surface of the round steel by the method of high-speed flame spraying, and the particle size of the powder is 45 mesh. The control range of spraying process parameters is as follows;

[0054] 1) Oxygen flow: 800 L / min;

[0055]2) Carrier gas flow: 2×8L / min;

[0056] 3) Fuel flow: 20 L / h;

[0057] 4)...

Embodiment 3

[0063] The first step: choose 200mm×200mm×2mm Q235 steel plate as the base material, clean the surface to be sprayed, use grinding or milling to remove rust spots and sundries, and use acetone to remove surface grease.

[0064] Step 2: Use a sandblasting machine to perform sandblasting on the cleaned surface. The sand is 30 mesh alumina, and then remove the remaining sand on the surface.

[0065] Step 3: Fix the sandblasted steel plate on a specific fixture. Before spraying, move the spray gun to preheat the surface of the steel plate. The preheating temperature is 200°C. The Cr2C3-25Ni20Cr powder material is sprayed onto the surface of the steel plate to be protected by the method of gas plasma spraying, and the particle size of the powder is 45 mesh. The control range of spraying process parameters is as follows;

[0066] 1) Hydrogen pressure: 12MPa;

[0067] 2) Argon pressure: 13MPa;

[0068] 3) Hydrogen flow: 15L / h;

[0069] 4) Argon gas flow: 80L / h;

[0070] 5) The s...

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Abstract

The invention relates to a method for coating a high-temperature corrosion and wear resistant coating layer on a surface of a steel material, and relates to the preparation of a metal-based ceramic composite material coating layer by a high-speed flame spraying method or a gas plasma spraying method. The preparation method of the coating layer comprises the steps of matrix surfaced cleaning, matrix surface sand blasting treatment and powder material spraying. The prepared coating layer has higher compactness, higher hardness, better toughness and excellent oxidation corrosion resistance under the condition of high temperature. The method has simple process steps; and the prepared protective coating layer can enable the steel material to be applied to the higher temperature environment, so that the problem of high-temperature corrosion resistance of the steel material is solved.

Description

technical field [0001] The invention relates to metal surface treatment, in particular to a method for coating a high-temperature corrosion-resistant and wear-resistant coating on the surface of steel. Background technique [0002] The good mechanical properties and low manufacturing cost of steel make it play a pivotal role in the production of the national economy. As a structural material, it supports the country's economic construction, and as a tool material, it is used in all aspects of people's daily life. However, Fe, the basic composition of steel, has high electrochemical activity, and it is easy to combine with oxygen in the air to form Fe2O3 oxides to oxidize and corrode. In the environment where water vapor exists, its oxidation and corrosion speed will be accelerated. Under high temperature conditions, Fe and oxygen become more active, and the oxidation and corrosion rate of steel is faster than that under low temperature conditions. [0003] The traditional a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/12C23C4/04C23C4/129C23C4/134
Inventor 靳东亮邹忠华赵晓峰肖平
Owner SHANGHAI JIAO TONG UNIV
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