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Carbon steel or stainless steel surface micro-arc oxidation ceramic coating based on aluminized coating, and preparation method thereof

A technology of micro-arc oxidation and ceramic coating, which is applied in the field of metal surface treatment, can solve the problems of large waste water discharge, slow plating speed, and short service life of plating solution, and improve hardness, reduce porosity, microhardness and The effect of improving wear resistance

Inactive Publication Date: 2017-05-24
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main ways to improve the wear resistance of stainless steel surfaces include electroless plating, electroplating, chemical vapor deposition, physical vapor deposition, and plasma spraying. For stainless steel plating with complex shapes, electroplating chromium cannot be qualified due to edge effects and poor coverage. Electroless plating), but electroless plating can deposit a uniform coating on the surface of parts with complex shapes, and the self-lubricating property of electroless plating is better than that of electroplating. Compared with electroplating, electroless plating has many advantages, such as good throwing ability and deep plating ability; There are few gaps; the equipment is simple and easy to operate; the coating has special mechanical, physical and chemical properties, etc. The disadvantages are: short service life of the plating solution, large amount of wastewater discharge, slow plating speed and high cost
However, due to Fe 3 o 4 and FeAl 2 o 4 The wear resistance of the stainless steel surface is low, and there is still a big gap in the demand for high wear resistance of the stainless steel surface

Method used

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  • Carbon steel or stainless steel surface micro-arc oxidation ceramic coating based on aluminized coating, and preparation method thereof
  • Carbon steel or stainless steel surface micro-arc oxidation ceramic coating based on aluminized coating, and preparation method thereof
  • Carbon steel or stainless steel surface micro-arc oxidation ceramic coating based on aluminized coating, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Experimental material: 188 stainless steel.

[0033] 2. Target material preparation: Refining the aluminum ingot in a vacuum induction furnace, the process parameters are: temperature 700°C, holding time 2 minutes, vacuum degree 2×10 -1 Pa. It is then cast into a cylindrical target ingot. The target ingot is machined to make a shaped target.

[0034] 3. Sandblasting pretreatment of stainless steel base material: SiO2 is used as abrasive material 2 , the abrasive particle size is 50 microns, and the nozzle pressure of the sandblasting machine is 0.3MPa. The spray angle is 45°grazing, the distance between the nozzle and the surface of the stainless steel plate is kept at about 2cm, and the roughening time is 30s. After sandblasting, rinse with a large amount of tap water and then deionized water to remove sand particles and metal shavings remaining on the surface.

[0035] 4. The preparation process of multi-arc ion plating is as follows: before the deposition of ...

Embodiment 2

[0041] 1. Experimental material: Q235 low carbon steel.

[0042] 2. Target material preparation: Refining the aluminum ingot in a vacuum induction furnace, the process parameters are: temperature 800°C, holding time 5 minutes, vacuum degree 2×10 -1 Pa. It is then cast into a cylindrical target ingot. The target ingot is machined to make a shaped target.

[0043] 3. Sand blasting pretreatment of low carbon steel matrix material: SiO2 is used as abrasive material 2 , the abrasive particle size is 100 microns, and the nozzle pressure of the sandblasting machine is 0.10Mp. The spray angle is 45°grazing, the distance between the nozzle and the surface of the low carbon steel plate is kept at about 2cm, and the roughening time is 30s. After sandblasting, rinse with a large amount of tap water and then deionized water to remove sand particles and metal shavings remaining on the surface.

[0044] 4. The preparation process of multi-arc ion plating is as follows: before the deposi...

Embodiment 3

[0048] 1. Experimental material: 2G25 cast steel.

[0049] 2. Target material preparation: Refining the aluminum ingot in a vacuum induction furnace, the process parameters are: temperature 750°C, holding time 3 minutes, vacuum degree 3×10 -1 Pa. It is then cast into a cylindrical target ingot. The target ingot is machined to make a shaped target.

[0050] 3. Sandblasting pretreatment of stainless steel base material: SiO2 is used as abrasive material 2 , the abrasive particle size is 50 microns, and the nozzle pressure of the sandblasting machine is 0.3MPa. The spray angle is 45°grazing, the distance between the nozzle and the surface of the stainless steel plate is kept at about 2cm, and the roughening time is 90s. After sandblasting, rinse with a large amount of tap water and then deionized water to remove sand particles and metal shavings remaining on the surface.

[0051] 4. The preparation process of multi-arc ion plating is as follows: before the deposition of the ...

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Abstract

The invention discloses a carbon steel or stainless steel surface micro-arc oxidation ceramic coating based on an aluminized coating, and a preparation method thereof, and belongs to the technical field of metal surface treatment. A nanoscale pure aluminum coating is formed by performing multi-arc ion plating on the surface of a stainless steel matrix, the surface of the aluminized coating is subjected to single positive pulse micro-arc oxidation, and a ceramic coating with the main component being Al2O3 is formed on the surface of the stainless steel by controlling the components of an electrolyte and electrical parameters such as the frequency and the oxidation time, so that preparation of the stainless steel surface coating with a wear-resistant function is realized. The stainless steel surface ceramic coating prepared by the method has high corrosion resistance and scratching resistance and extremely high hardness, and solves the problem that the traditional stainless steel surface treatment technology (phosphorization, chemical plating and plasma spray-coating) cannot meet requirements such as high wear resistance, high hardness, high corrosion resistance and good binding force under the condition that the coating is thin (the thickness is less than 30 microns).

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a micro-arc oxidation ceramic coating on the surface of carbon steel or stainless steel based on an aluminized layer and a preparation method thereof. Background technique [0002] Stainless steel has excellent characteristics such as unique strength, high wear resistance, superior anti-corrosion performance and not easy to rust. Therefore, it is widely used in chemical industry, food machinery, electromechanical, environmental protection, household appliance industry and home decoration, etc. However, the hardness of stainless steel is low (usually 200-250HV), and its wear resistance is poor. When micro-scratches appear on the surface, corrosion micro-batteries will be formed, thereby reducing the corrosion resistance of the product and causing the product to be scrapped prematurely. Transmission shafts, meshing parts or moving parts based on stainless steel oft...

Claims

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Application Information

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IPC IPC(8): C23C14/32C23C14/16C25D11/06C23C28/00
Inventor 张伟辛丽朱圣龙张涛王福会
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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