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Ni-based coating with abrasion-resistance corrosion-resistance nanometer structure and preparation method

A nanostructure and coating technology, applied in coatings, metal material coating technology, anti-corrosion coatings, etc., can solve the problem of low-cost nano-structured alloy coatings with little research, high requirements for comprehensive wear and corrosion resistance, Limit applications and other issues to achieve the effect of low cost, low porosity, and high flight speed

Active Publication Date: 2009-12-02
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned thermal sprayed nanostructured coatings all have very high wear resistance, but most of them are ceramic coatings (such as nanostructured Al 2 o 3 / TiO 2 and WC-Co coating), and does not involve corrosion resistance, but under certain working conditions, the comprehensive performance requirements for wear and corrosion resistance are high. In addition, the high cost of these coating systems limits their application
So far, little research has been done on low-cost, high-performance nanostructured alloy coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) After the raw material powder is proportioned, spray powder is prepared by vacuum atomization method. The powder making process parameters are: smelting vacuum degree 0.01Pa, melting temperature 1600°C, atomization pressure 4.0Mpa, atomization atmosphere is argon , the components and contents of the spray powder are: C: 1.5%wt, B: 3.0%wt, Si: 2.5%wt, Fe: 4.0%wt, Cr: 12.0%wt, the balance is Ni, the particle size of the spray powder 5~45μm;

[0017] 2) The spray powder prepared in step 1) is sprayed onto the 0Cr13Ni5Mo stainless steel substrate by active combustion high-speed gas spraying technology to obtain a wear-resistant and corrosion-resistant nanostructure Ni-based coating. The spraying process parameters are: air pressure 0.55MPa, primary combustion Chamber pressure: 0.44MPa, secondary combustion chamber pressure: 0.24MPa, spraying distance: 100mm, powder feeding speed: 6ppm.

Embodiment 2

[0019] 1) After the raw material powder is proportioned, spray powder is prepared by vacuum atomization method. The powder making process parameters are: smelting vacuum degree 0.05Pa, smelting temperature 1700℃, atomization pressure 2.5Mpa, atomization atmosphere is argon , the components and contents of the spray powder are: C: 0.8%wt, B: 3.8%wt, Si: 3.5%wt, Fe: 7.8%wt, Cr: 17.5%wt, the balance is Ni, the particle size of the spray powder 5~45μm;

[0020] 2) The spray powder prepared in step 1) is sprayed on the 0Cr13Ni5Mo stainless steel substrate by active combustion high-speed gas spraying technology to obtain a wear-resistant and corrosion-resistant nanostructure Ni-based coating. The spraying process parameters are: air pressure 0.60MPa, primary combustion Chamber pressure: 0.49MPa, secondary combustion chamber pressure: 0.28MPa, spraying distance: 150mm, powder feeding speed: 4ppm.

Embodiment 3

[0022] 1) After the raw material powder is proportioned, spray powder is prepared by vacuum atomization method. The powder making process parameters are: smelting vacuum degree 0.1Pa, melting temperature 1800°C, atomization pressure 2.0Mpa, atomization atmosphere is argon , the components and contents of the spray powder are: C: 0.5%wt, B: 5.0%wt, Si: 6.0%wt, Fe: 9.0%wt, Cr: 25.0%wt, the balance is Ni, the particle size of the spray powder 5~55μm;

[0023] 2) The spray powder prepared in step 1) is sprayed on the 0Cr13Ni5Mo stainless steel substrate by active combustion high-speed gas spraying technology to obtain a wear-resistant and corrosion-resistant nanostructure Ni-based coating. The spraying process parameters are: air pressure 0.60MPa, primary combustion Chamber pressure: 0.55MPa, secondary combustion chamber pressure: 0.33MPa, spraying distance: 200mm, powder feeding speed: 2ppm.

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Abstract

The invention provides a Ni-based coating with an abrasion-resistance corrosion-resistance nanometer structure and a preparation method thereof, which belong to the technical field of surface engineering. The Ni-based coating and the preparation method aim to solve the problems of poor corrosion resistance, high cost and the like of the coating of the prior nanometer structure. Spray powder of the coating comprises the following compositions by weight: 0.5 to 1.5 weight percent of C, 3.0 to 5.0 weight percent of B, 2.5 to 6.0 weight percent of Si, 4.0 to 9.0 weight percent of Fe, 12.0 to 25 weight percent of Cr, and the balance of Ni, wherein the granularity of the spray powder is between 5 and 55 micrometers. The method comprises the steps of preparing spray powder by adopting a gas atomization method; then spraying the spray powder onto a substrate by active combustion high-speed gas spray technology, and preparing the Ni-based coating with the nanometer structure. The coating has high comprehensive performance in abrasion resistance and corrosion resistance, and low preparation cost, and is applicable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and in particular relates to a technology for preparing a wear-resistant and corrosion-resistant nanostructure Ni-based coating by means of active combustion high-speed gas spraying. Background technique [0002] Nanomaterials have attracted widespread attention due to their excellent mechanical, physical, and chemical properties. With the development of surface engineering technology, it is possible to combine surface coating technology with nanomaterials to prepare high-performance nanostructured coatings. Among them, thermal spraying technology has the advantages of simple process, wide selection range of coating and substrate, wide range of coating thickness variation, high deposition efficiency, and easy formation of composite coatings. Nanostructured coatings prepared by thermal spraying have the advantages of wear resistance, high hardness and bonding strength, and good fractur...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/10C09D5/03C23C4/06C23C4/08
Inventor 马光李现兵韩钰陈玉成聂京凯陈新徐德录
Owner CHINA ELECTRIC POWER RES INST
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