Anti-scuffing treatment method for surface of water turbine

A treatment method and surface treatment technology, applied in metal material coating process, fusion spraying, coating, etc., to achieve good wear resistance, high hardness, and effective anti-abrasion performance

Active Publication Date: 2014-01-15
XIAN YUFENG SPRAYING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the various difficult technical problems existing in spraying water turbine

Method used

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  • Anti-scuffing treatment method for surface of water turbine
  • Anti-scuffing treatment method for surface of water turbine
  • Anti-scuffing treatment method for surface of water turbine

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Experimental program
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Embodiment Construction

[0063] HVOF technology is to inject the spray material into the flame of high-speed jet combustion in the powder state, and its spray speed can reach 2000 m / s. The material is tightly and evenly attached to the surface of the object to be sprayed, and is physically combined with the substrate.

[0064] The characteristics of the High Velocity Oxygen Spraying (HVOF) technology are more favorable for resisting the abrasive damage of the turbine. Therefore, an innovative coating forming process for super-large and complex space-distorted surface parts is used for HVOF spraying, so that the microstructure of the coating is more uniform and dense, the substrate does not undergo any deformation, the bonding strength is greater than 70MPa, and the surface hardness is greater than 1100Hv. The surface wear resistance is more than 70 times higher than 0Cr13Ni4Mo, and its cavitation resistance is equivalent to 0Cr13Ni4Mo. The successful application of this composite coating technology h...

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PUM

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Abstract

The invention relates to an anti-scuffing treatment method for a surface of a water turbine, comprising the following steps of: (1) surface treatment; and (2) spraying: (2.1) spraying priming coat on the surfaces of flow passage components of the water turbine to be sprayed in 1-4h after the surfaces reach the standard by pretreatment; (2.2) spraying a transition layer on the surface of the priming coat; (2.3) spraying a functional layer on the surface of the transition layer; and (2.4) spraying or brushing a protective layer on the surface of the functional layer to form a whole composite coating. The invention solves a technology problem that it is difficult to spraying the water turbine at present. The method provided by the invention forms a hard physical combination layer on the flow passage surfaces of the water turbine by an ultrasonic flame spraying technology. The hard physical combination layer makes a very effective protection effect on the flow passage components.

Description

technical field [0001] The invention belongs to the technical field of hydropower equipment, and in particular relates to an anti-abrasion treatment method for the surface of a water turbine. Background technique [0002] For a long time, the flow-passing components of hydro turbines in my country's hydropower stations have suffered from severe sediment wear, resulting in reduced turbine efficiency, shortened maintenance cycles, extended construction periods, and increased unplanned outages, which have seriously affected the economic and safe operation of power plants. [0003] In order to improve the ability of the flow parts of the turbine to resist sediment wear, spray welding technology is usually used to form a protective layer on the surface of the turbine. Although a certain effect has been achieved, due to the complex curve of the flow surface of the turbine and the many factors of abrasion and damage to the turbine, it is difficult to Strengthening the anti-abrasion...

Claims

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Application Information

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IPC IPC(8): C23C4/12C23C4/08C23C4/06C23C4/10C23C4/02C23C4/18C23C4/129
Inventor 任红旗李翠林
Owner XIAN YUFENG SPRAYING TECH CO LTD
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