Surface composite coating of turbomachine rotor blade and preparation method thereof

A technology of rotor blades, turbomachinery, applied in the direction of mechanical equipment, supporting elements of blades, coatings, etc.

Active Publication Date: 2007-08-01
XIAN SHAANGU POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problem of early failure of turbomachinery flow parts (such as blades, etc.) due to corrosion and wear under complex working conditions of high stress, high temperature, corrosive environment, and the synergistic effect of high-speed airflow containing hard particles , providing a composite coating on the surface of a turbomachinery rotor blade and a preparation method thereof, the method prepares a three-layer composite coating on a turbomachinery rotor blade, which can effectively protect the surface of a turbomachinery rotor blade

Method used

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  • Surface composite coating of turbomachine rotor blade and preparation method thereof
  • Surface composite coating of turbomachine rotor blade and preparation method thereof

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Embodiment Construction

[0021] A composite coating on the surface of a turbomachinery rotor blade is characterized in that the prepared composite coating is divided into a bonding bottom layer, an intermediate corrosion-resistant alloy layer and a cermet hard wear-resistant outer layer; wherein:

[0022] The hard and wear-resistant outer layer of cermet, the spraying material is coated with metal cobalt (Co) with a mass fraction of 12%, the grain size is 1 μm to 3 μm, and the mass fraction is 88wt% tungsten carbide (WC), which is agglomerated and sintered Cobalt-coated tungsten carbide composite powder with a particle size of 400 mesh to 500 mesh prepared by the method.

[0023] The intermediate corrosion-resistant alloy layer is sprayed with 55% metallic nickel (Ni) and 45wt% metallic chromium (Cr) as raw materials for spraying, and the alloy powder with a particle size of 300 mesh to 400 mesh prepared by metallurgical methods.

[0024] Adhesive base layer, the spraying raw materials are 75% nickel ...

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Abstract

The invention discloses a surface composite coat of the blade on rotor and relative production, wherein, the composite coat is divided into adhesive bottom, middle corrosion-resistance alloy layer and metal ceramic rigid abrasion-resistance layer. The invention utilizes high-energy plasma coater and ultrasonic plasma injector, via ultrasonic plasma coating technique to coat aforementioned three layers on the base of blade; then seal the outer face via macromolecule sealing agent as polyurethane or acrylic acid. The thickness of metal ceramic rigid abrasion-resistance layer is 0.12mm, the thickness of middle corrosion-resistant alloy layer is 0.08mm, and the thickness of bottom adhesive layer is 0.05mm. The invention can improve the corrosion resistance and abrasion resistance of blade.

Description

technical field [0001] The invention relates to a method for preparing a surface composite coating, in particular to a composite coating for anti-corrosion and anti-wear on the surface of a turbine rotor blade and a preparation method thereof. Three layers of coatings with different functions are prepared on the surface, which makes the turbine blades have excellent anti-corrosion and wear-resistant properties. Background technique [0002] Turbomachinery relies on the high-speed rotation of the rotor and the work of the blades to achieve a certain gas flow and pressure. These gases are usually air, gas or other industrial gases (such as H 2 , CH 4 , CO, H 2 , CO 2 , C 2 h 4 , O 2 , H 2 S, NH 3 , tar, naphthalene, etc.), has a high temperature, a certain degree of corrosion, and sometimes the gas contains a certain amount of hard particles (such as dust, etc.), which will cause corrosion, erosion and wear to the high-speed rotating turbine blades . It affects the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/28C23C24/00C23C4/00C22C29/08C23C4/06C23C4/073C23C4/134
Inventor 韩增福韩志海
Owner XIAN SHAANGU POWER
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