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Anticorrosive and wear-resistant composite coating for alloy material part surface, and preparation method thereof

A composite coating and alloy material technology, applied in metal material coating process, coating, vacuum evaporation plating and other directions, can solve the problems of high temperature and inability to conduct on-site construction, etc., and achieve stable processing quality, easy control and good quality. The effect of bonding force and wear and temperature resistance

Active Publication Date: 2018-09-11
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention adopts arc plasma technology for nitriding and oxidation, which overcomes the shortcomings of conventional nitriding methods, such as high temperature and impossibility of on-site construction

Method used

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  • Anticorrosive and wear-resistant composite coating for alloy material part surface, and preparation method thereof
  • Anticorrosive and wear-resistant composite coating for alloy material part surface, and preparation method thereof

Examples

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preparation example Construction

[0036] The device for preparing the anti-corrosion and wear-resistant composite coating on the surface of alloy material parts adopted in the present invention is schematically shown as figure 1 shown.

[0037] The schematic diagram of the structure of the anti-corrosion and wear-resistant composite coating on the surface of the alloy material part of the present invention is as follows figure 2 shown.

Embodiment 1

[0039] In the atmospheric environment, for 12Cr1MoV alloy steel, the arc discharge between the cathode and anode of the plasma gun is used to generate strong plasma. The power of the plasma gun is 10kW, and the rotation speed of the parts is 1RPM. Firstly, argon gas is injected into the plasma gun, and the pressure of argon gas is 0.1MPa. When the plasma contacts the surface of the component, the plasma will clean the surface pollutants. The high temperature of the plasma causes the alloy component to heat up locally, and the surface is austenitized. When the high-temperature surface of the component leaves the plasma, it is cooled rapidly, and a fine-grained strengthening structure layer is formed on the surface of the material, and the thickness of the refined layer is 0.2mm. When the cleaning process is finished, nitrogen gas is introduced, and the nitrogen pressure is 0.1MPa to generate nitrogen plasma, which interacts with the alloy surface to form a nitride wear-resistant...

Embodiment 2

[0041] In the atmospheric environment, for 316 stainless steel, the arc discharge between the cathode and anode of the plasma gun is used to generate strong plasma. The power of the plasma gun is 300kW, and the rotation speed of the parts is 20RPM. Firstly, argon gas is introduced into the plasma gun, and the pressure of argon gas is 0.8MPa. When the plasma contacts the surface of the component, the plasma will clean the surface pollutants. The high temperature of the plasma will cause the alloy component to heat up locally, and the surface will be austenitized. When the high-temperature surface of the component leaves the plasma, it is cooled rapidly, and a fine-grained strengthening structure layer is formed on the surface of the material, and the thickness of the refined layer is 0.5mm. When the cleaning process is finished, nitrogen gas is introduced, and the nitrogen pressure is 0.8MPa to generate nitrogen plasma, which interacts with the alloy surface to form a nitride we...

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Abstract

The invention discloses an anticorrosive and wear-resistant composite coating for an alloy material part surface, and a preparation method thereof. The composite coating is formed by a fine grain strengthening structure layer, a transition supporting layer, a nitride wearing layer, an oxynitride gradient transition layer and an oxide anticorrosion layer from the inside to the outside. The coatingis a multilayer gradient combination in structure, and has a gradual change characteristic in component, so the internal stress of the coating is greatly reduced, the toughness of the coating is improved, the disadvantage of poor performances of existing anticorrosive and wear-resistant coating is overcome, and the wear resistance and the corrosion resistance of the alloy material key part surfaceare improved. An arc plasma technology is adopted to achieve nitriding and oxidation, so the nitriding depth is great, and the time is short; and ionized water vapor is used to perform oxidation, soobtained oxide has good compactness. The plasma technology has strong adaptability, and can be used in various environments to meet the processing requirements of large and small workpieces; and the coating has the advantages of simple device structure, easiness in control, and good industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of surface treatment, and in particular relates to an anti-corrosion and wear-resistant composite coating on the surface of an alloy material component and a preparation method thereof. Background technique [0002] Friction, wear and corrosion are common phenomena in nature. Friction has advantages and disadvantages for human life and production activities, but wear and tear is harmful but not beneficial. Abrasion is one of the three major causes of material damage, and it loses 1 / 3 of the primary energy in the world. Annual losses related to friction and wear account for about 2% to 7% of GDP. In various industrial sectors such as metallurgy, mining, chemical industry, building materials and aerospace, many workpieces and equipment fail rapidly due to wear, resulting in waste of materials and manpower, and huge losses to the national economy. It is of great practical significance to develop wear-resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/02C23C14/06C23C14/08C23C14/32
CPCC23C14/0021C23C14/022C23C14/0641C23C14/0676C23C14/08C23C14/325
Inventor 杨兵刘琰赵鑫吴忠烨陈燕鸣郭嘉琳
Owner WUHAN UNIV