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Wear-resistant and corrosion-resistant cr/cralsin composite coating, its preparation method and application

A composite coating and corrosion-resistant technology, applied in the wear-resistant and corrosion-resistant Cr/CrAlSiN composite coating and its preparation, in the field of wear-resistant and corrosion-resistant coatings, can solve the problems of inability to meet the needs of the workpiece, material peeling, easy failure, etc. Achieve good application prospects, prevent coating failure and peeling, and improve the effect of bearing and anti-wear ability

Active Publication Date: 2020-07-28
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional CrN coating is easy to form penetrating corrosion channels in the corrosive medium due to its significant columnar crystal structure, which leads to material peeling and even failure, especially under high load conditions.
Therefore, the traditional CrN coating can no longer meet the requirements of the workpiece in the extreme environment of the ocean.

Method used

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  • Wear-resistant and corrosion-resistant cr/cralsin composite coating, its preparation method and application
  • Wear-resistant and corrosion-resistant cr/cralsin composite coating, its preparation method and application
  • Wear-resistant and corrosion-resistant cr/cralsin composite coating, its preparation method and application

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preparation example Construction

[0036] Another aspect of the embodiments of the present invention provides a method for preparing a wear-resistant and corrosion-resistant Cr / CrAlSiN composite coating, which may include the following steps:

[0037] Perform ion nitriding treatment and / or ion etching treatment on the surface of the substrate;

[0038] And, sequentially depositing a Cr layer and a CrAlSiN layer on the surface of the substrate to form the composite coating.

[0039] In some preferred embodiments, the preparation method includes: performing surface cleaning treatment on the surface of the substrate, and then sequentially performing ion nitriding treatment and ion etching treatment on the clean substrate surface, which has the effect of purifying the surface and can remove the surface of the workpiece. Passive film and pollutants.

[0040] Further, the surface cleaning treatment includes: sequentially ultrasonically cleaning the surface of the substrate with a degreasing agent and more than one o...

Embodiment 1

[0071] Embodiment 1: with 304 stainless steel spheres as sample, the technique that forms Cr / CrAlSiN composite coating on its surface comprises the following steps:

[0072] (1) Sample pretreatment: In order to remove the oil on the surface of the sample, first put the sample in a degreasing agent (such as petroleum ether) and ultrasonically clean it for 30 minutes, then put it in acetone and ultrasonically clean it for 10 minutes, and then ultrasonically clean it in absolute ethanol 10min, finally take it out and dry it with nitrogen gas, and carry out ion nitriding treatment.

[0073] Preferably, the above-mentioned ion nitriding treatment specifically includes: placing the cleaned substrate in the chamber of the coating equipment, feeding nitrogen with a flow rate of 1000 sccm, controlling the working pressure at 8Pa, applying a -800V negative bias to the substrate, and the temperature The temperature is controlled at 450°C, and the nitriding treatment time is 2 hours. The...

Embodiment 2

[0081] Embodiment 2: a ball valve made of 316 stainless steel is used as a substrate, and the process of forming a Cr / CrAlSiN composite coating on its surface comprises the following steps:

[0082] (1) Sample pretreatment: In order to remove the oil on the surface of the sample, first put the sample in a degreasing agent (such as petroleum ether) and ultrasonically clean it for 30 minutes, then put it in acetone and ultrasonically clean it for 10 minutes, and then ultrasonically clean it in absolute ethanol 10min, finally take it out and dry it with nitrogen gas, and carry out ion nitriding treatment.

[0083] As a preference, the above-mentioned ion nitriding treatment specifically includes: placing the cleaned substrate in the vacuum chamber of the coating equipment, feeding in a nitrogen gas flow rate of 1200 sccm, controlling the working pressure at 9Pa, applying a -1000V negative bias to the substrate, and controlling the temperature At 500°C, the nitriding treatment tim...

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Abstract

The invention discloses an anti-abrasion and anti-corrosion Cr / CrAlSiN composite coating. The anti-abrasion and anti-corrosion Cr / CrAlSiN composite coating comprises a bonding layer and an anti-abrasion and anti-corrosion layer which are sequentially formed on a matrix. A Cr layer is adopted for the bonding layer, a CrAlSiN layer is adopted for the anti-abrasion and anti-corrosion layer, the CrAlSiN layer has an amorphous nanocrystalline structure and includes a CrN phase, a AlN strengthening phase and an amorphous-state Si3N4 phase which have face centered cubic structures, and the amorphous-state Si3N4 phase wraps the CrN phase and the AlN strengthening phase. The composite coating has excellent bearing and anti-abrasion capacity and anti-corrosion performance, can meet the high-performance requirements on various parts and facilities under the severe working conditions, and has good application prospects. The invention further discloses a preparation method of the composite coating.The preparation method is simple and easy to carry out, and volume production can be achieved.

Description

technical field [0001] The invention relates to a wear-resistant and corrosion-resistant coating, in particular to a wear-resistant and corrosion-resistant Cr / CrAlSiN composite coating and its preparation method and application, such as application in marine environments such as marine engineering equipment, offshore facilities, ships and ships , belongs to the technical field of material corrosion. Background technique [0002] With the gradual development and utilization of deep-sea resources, marine engineering materials are facing huge corrosion and wear, which will seriously restrict the development of major marine engineering technologies and equipment, and its corrosion failure will seriously affect the reliability and reliability of marine engineering and equipment. The service life and corrosion protection technology of materials have become urgent problems to be solved in the field of marine engineering in my country. For example, valves, sealing rings, etc., as ke...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C28/00C23C8/36C23C14/02C23C14/16C23C14/06C01B21/082
CPCC01B21/082C01P2002/72C21D2201/03C23C8/36C23C14/0084C23C14/022C23C14/06C23C14/16C23C28/322
Inventor 王永欣毛春龙叶育伟毛金根刘孟奇陈善俊王立平
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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