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Wear-resistant and corrosion-resistant spray coating on valve flow surface and preparation method thereof

A flow-through surface and corrosion-resistant technology, applied in coatings, metal material coating processes, molten spraying, etc., can solve problems such as insufficient wear and corrosion resistance, high brittleness of sprayed materials, and large tendency to fall off. To achieve the effect of prolonging the service life, improving the brittleness and good powder fluidity

Active Publication Date: 2021-09-07
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a wear-resistant and corrosion-resistant spray coating on the overflow surface of a valve and a preparation method thereof. Its composition content makes the structure and particle size distribution of the sprayed coating uniform, and the fluidity is better, which effectively solves the problems of high brittleness, high tendency to fall off, insufficient wear and corrosion resistance and short service life of sprayed materials

Method used

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  • Wear-resistant and corrosion-resistant spray coating on valve flow surface and preparation method thereof
  • Wear-resistant and corrosion-resistant spray coating on valve flow surface and preparation method thereof
  • Wear-resistant and corrosion-resistant spray coating on valve flow surface and preparation method thereof

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Embodiment 1

[0031] A wear-resistant and corrosion-resistant spray coating on the overflow surface of a valve and its preparation method and its preparation method. The wear-resistant and corrosion-resistant spray coating includes the following components: powder, adhesive and dispersant, powder, adhesive The weight ratio with the dispersant is 100:2:2; the powder includes the following weight percentage components: nickel powder 10%, chromium powder 5%, and the balance is composite solid solution powder; the composite solid solution powder includes the following weight percentage components: carbon 8%, nitrogen 7%, tungsten 10%, molybdenum 5%, vanadium 5%, and the balance is titanium. The particle size of nickel powder, chromium powder and composite solid solution powder is 1-2.5 μm; the binder is polyvinyl alcohol, and the dispersant is n-heptane.

[0032] The preparation method of the above-mentioned wear-resistant and corrosion-resistant spray coating on the flow-through surface of the...

Embodiment 2

[0039]A wear-resistant and corrosion-resistant spray coating on the overflow surface of a valve and its preparation method and its preparation method. The wear-resistant and corrosion-resistant spray coating includes the following components: powder, adhesive and dispersant, powder, adhesive The weight ratio with the dispersant is 100:4:3; the powder includes the following components in weight percent: nickel powder 20%, chromium powder 10%, and the balance is composite solid solution powder; the composite solid solution powder includes the following components in weight percent: carbon 9%, nitrogen 8%, tungsten 13%, molybdenum 10%, vanadium 8%, and the balance is titanium. The particle size of nickel powder, chromium powder and composite solid solution powder is 1-2.5 μm; the binder is polyvinyl alcohol, and the dispersant is n-heptane.

[0040] The preparation method of the above-mentioned wear-resistant and corrosion-resistant spray coating on the flow-through surface of th...

Embodiment 3

[0047] A wear-resistant and corrosion-resistant spray coating on the overflow surface of a valve and its preparation method and its preparation method. The wear-resistant and corrosion-resistant spray coating includes the following components: powder, adhesive and dispersant, powder, adhesive The weight ratio with the dispersant is 100:5:4; the powder includes the following components in weight percent: 30% nickel powder, 15% chromium powder, and the balance is composite solid solution powder; the composite solid solution powder includes the following components in weight percent: carbon 10%, nitrogen 10%, tungsten 15%, molybdenum 15%, vanadium 10%, and the balance is titanium. The particle size of nickel powder, chromium powder and composite solid solution powder is 1-2.5 μm; the binder is polyvinyl alcohol, and the dispersant is n-heptane.

[0048] The preparation method of the above-mentioned wear-resistant and corrosion-resistant spray coating on the flow-through surface o...

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Abstract

The invention provides a wear-resistant and corrosion-resistant spray coating on the overflow surface of a valve and a preparation method thereof. The spray coating includes the following components: powder, adhesive and dispersant, and the composition of powder, adhesive and dispersant The weight ratio is 100:2-5:2-4; the powder includes the following components in weight percentage: 10-30% of nickel powder, 5-15% of chromium powder, and the balance is composite solid solution powder. The invention also provides a preparation method of the sprayed layer. The process flow of the invention is simple, adding materials or elements with excellent properties to the spray coating material, improving its composition content, making the spray coating structure and particle size distribution uniform, and better fluidity, effectively solving the problem of high brittleness and shedding tendency of the spray coating material Large size, insufficient wear and corrosion resistance and short service life.

Description

technical field [0001] The invention belongs to the technical field of valve spray coating, and in particular relates to a wear-resistant and corrosion-resistant spray coating on the flow-over surface of a valve and a preparation method thereof. Background technique [0002] High Velocity Oxy Fuel (HVOF for short) is a new type of thermal spraying technology developed on the basis of ordinary flame spraying in the early 1980s. It uses hydrogen, acetylene, propylene, kerosene, etc. as fuel, uses oxygen as a combustion aid, burns in a combustion chamber or a special nozzle, and produces a supersonic combustion flame with a speed of 2000-3000 °C and a speed of 2100 m / s or more. The powder is fed into the flame to produce molten or semi-molten particles, which are deposited on the surface of the substrate at high speed to form a coating. The coating has higher bonding strength and denser than ordinary flame spraying or plasma spraying. Due to the high flame flow velocity and re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/067C23C4/129C23C4/02B22F9/04B22F9/08B22F3/10
CPCB22F3/1007B22F9/04B22F9/08B22F2009/043C23C4/02C23C4/067C23C4/129
Inventor 万维财王宗元李玉和樊坤阳
Owner XIHUA UNIV
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