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Preparation method of fluid valve part resistant to erosion and wear

A kind of anti-erosion, fluid technology, applied in the field of valve manufacturing, can solve the problem of limited erosion and wear resistance

Active Publication Date: 2021-09-14
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the corrosion resistance of valves prepared by existing methods, especially the erosion and wear resistance is still limited.

Method used

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  • Preparation method of fluid valve part resistant to erosion and wear

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The valve seat is formed by casting, and then the atmospheric plasma spray process is sprayed with a carbide-tungsten carbide-based coating on the inner wall surface of the seat, and the tungsten carbide-based coating is coarse particles Wc, W, WC, Wc, W 2 C and submicron CR 7 C 3 , Cr 23 C 6 Uniformly distributed in the nickel base bonding phase, WC and W in the coating 2 The total volume fraction of C hard phase is 45.4%, and Cr in coating. 7 C 3 CR 23 C 6 The total volume fraction of the dispersion strengthened phase is 16.2%, the mass fraction of Ni in the nickel-based bond phase is 83.6%, the rest is Cr, Fe and Si, and the nickel-based phase of the phase is FENI. 3 , CRSI 2 CR 3 Si, the tungsten carbide-based coating has a thickness of 0.65 mm; after the surface of the optical whole surface, a layer of gas phase deposition is continued to deposit a layer of nitride ceramic layer on the surface of the tungsten carbide group, and the process is 2.0 × 10 in the back botto...

Embodiment 2

[0016] The spheroid is formed by a forging method. Subsequently, an ultrasonic flame spray process is sprayed with a tungsten carbide-based coating surface, and the tungsten carbide-based coating is coarse particles Wc, Wc, Wc, Wc. 2 C and submicron CR 7 C 3 , Cr 23 C 6 Uniformly distributed in the nickel base bonding phase, WC and W in the coating 2 The total volume fraction of the C hard phase is 58.9%, the CR in the coating 7 C 3 CR 23 C 6 The total volume fraction of the dispersion strengthened phase is 24.7%, and the mass fraction of Ni in the nickel-based bonding phase is 81.8%, the rest is Cr, Fe and Si, and the nickel-based phase of the phase is Feni. 3 , CRSI 2 CR 3 Si, the tungsten carbide-based coating has a thickness of 0.83 mm; after the surface of the optical whole surface, a layer of gas phase deposition is continued to deposit a layer of nitride ceramic layer on the surface of the tungsten carbide group, and the process is 4.0 × 10 in the back bottom vacuum. -3 Whe...

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Abstract

The invention discloses a preparation method of a fluid valve part resistant to erosion and wear. The method comprises the following steps that a tungsten-carbide-based coating and a nitride ceramic layer are prepared on the surface of the fluid valve part formed through casting or forging by using a thermal spraying method and a physical vapor deposition method respectively; and then through vacuum heat treatment and pulse electromagnetic field post-treatment, structure defects such as holes in the coating are eliminated, residual stress is reduced, and the combination of the coating and a substrate as well as the combination of the outer coating and the inner coating are enhanced. The method is simple to operate and easy to implement, and the obtained double-process double-layer composite coating fluid valve part has the functions of wear resistance and erosion resistance and has long service life under an erosion working condition of sand-containing liquid.

Description

Technical field [0001] The present invention belongs to the field of valve manufacturing techniques, and more particularly to a fluid valve part preparation method of anti-erosion wear. Background technique [0002] Corrosion and wear loss are one of the key issues facing oil and gas exploitation, transportation, chemical, and sewage treatment, etc., even if the valve parts manufactured by martic stainless steel, there is a large limit. In order to improve the wear resistance and corrosion resistance of the fluid valve, a layer of wear resistance and anticorrosive coating is prepared on the surface of the valve part by surface nitriding, chrome-plating, welding, heat spraying, and the like. Among them, thermal spraying techniques are widely used due to flexible process, convenient operation, more varieties of spray materials, and high production efficiency have been widely used. Compared to ordinary valves, the use of coated valves is improved in service life. Nevertheless, there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C23C4/134C23C4/129C23C4/06C22C29/08C23C4/18C23C14/02C23C14/06C23C14/58C21D10/00
CPCC23C28/34C23C4/134C23C4/129C23C4/06C22C29/08C22C29/067C23C4/18C23C14/022C23C14/0641C23C14/5806C23C14/58C21D10/00
Inventor 鲜广赵海波鲜丽君范洪远熊计王均郭智兴
Owner SICHUAN UNIV
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