Anti-abrasion treatment method for water turbine surface

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

Active Publication Date: 2015-12-16
XIAN YUFENG SPRAYING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the various difficult technical problems existing in spraying water turbines, the present invention provides an anti-abrasion treatment method for the surface of water turbines

Method used

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  • Anti-abrasion treatment method for water turbine surface
  • Anti-abrasion treatment method for water turbine surface
  • Anti-abrasion treatment method for water turbine surface

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Embodiment Construction

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

[0064] The characteristics of high-velocity flame spraying (HVOF) technology are more favorable for resisting the abrasion damage of hydraulic turbine. Therefore, the coating forming process of super-large and complex space-distorted surface parts is innovated to carry out HVOF spraying, so that the microstructure of the coating is more uniform and dense in all directions, the substrate does not undergo any deformation, the bonding strength is greater than 70MPa, and the surface hardness is greater than 1100Hv. The surface anti-wear ability is more than 70 times higher than that of 0Cr13Ni4Mo, and its anti-cavitation ability is equivalent to that of 0Cr13Ni4Mo. The successful application ...

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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 particularly relates to an anti-abrasion treatment method for the surface of a water turbine. Background technique [0002] For a long time, the overcurrent components of the turbines in my country's hydropower stations have suffered from severe sediment wear, resulting in reduced turbine efficiency, shortened maintenance cycles, prolonged construction periods, and increased unplanned outages, which seriously affect the economic and safe operation of power plants. [0003] In order to improve the ability of the turbine overcurrent parts to resist the sand and sand wear, spray welding technology is usually used to form a protective layer on the surface of the turbine. Strengthening the anti-abrasion technology of the flow surface of the turbine brings many problems; and because of the complexity of the turbine blade and the thickness of the workpiece, it brings many difficulties t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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