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Coating thermal spraying process for turbine movable vanes of gas turbine

A gas turbine, thermal spraying technology, applied in metal material coating process, coating, fusion spraying, etc., can solve the difficulty of affecting production efficiency, poor coating microstructure performance, and poor coating uniformity of moving blades and other problems, to reduce the difficulty of debugging, improve production efficiency, and improve the effect of coating structure

Inactive Publication Date: 2020-04-24
华瑞(江苏)燃机服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The surface of the gas turbine turbine blade is a complex curved surface. When the existing thermal spraying process is used to spray the blade, the spray gun is held by the mechanical arm for overall spraying. It is necessary to program and debug the spraying trajectory of the spray gun. The trajectory debugging is difficult. The ease of production will also directly affect the production efficiency. The uniformity of the coating on the rotor blades sprayed by this spraying process is poor, and the microstructure of the coating between the various parts of the rotor blades is poor.

Method used

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Comparison scheme
Effect test

Embodiment Construction

[0015] Below in conjunction with specific embodiment, technical content of the present invention is elaborated:

[0016] A coating thermal spraying process for gas turbine turbine blades. For the GE MS6001B gas turbine turbine part of the first stage blades, the blades are sprayed with supersonic spraying method to ensure that the thickness error of the coating can be controlled. Within 50 microns, including the following process steps:

[0017] a. Surface pretreatment: first heat the blades to degrease, place the blades in a heating device, heat the temperature of the heating device to 330-370 ° C, keep at this temperature for one hour, then take out the blades and cool them to 16 -30°C, then carry out surface roughening treatment, place the cooled blades in the sandblasting box, perform sandblasting on the area to be sprayed to roughen the surface of the rotor blades, and put the sandblasting gun in the sandblasting box with the blades The sandblasting area forms an include...

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PUM

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Abstract

The invention discloses a coating thermal spraying process of a turbine movable vane of a gas turbine. The spraying process is characterized in that surface pre-treatment is performed on the turbine movable vane to roughen the surface, then spraying is performed, the moving vane is divided into a transition circular arc area, a circular arc and vane body transition area, a platform area, and a vane body area, firstly, when the circular arc and vane body transition area, the transition circular arc area and the platform area are sprayed, the movable vane is kept still, when the vane body area is sprayed, the movable vane rotates, and finally, the movable vane is subjected to coating treatment. According to the coating thermal spraying process of the turbine movable vane of the gas turbine,the uniformity of the thermal spraying coating of the movable vane is improved, the critical area coating organization is improved, the debugging difficulty of the thermal spraying program is reduced,programming and maintenance are facilitated, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of spraying of moving blades, in particular to a coating thermal spraying process for gas turbine turbine moving blades. Background technique [0002] Thermal spraying refers to heating and melting the coating material, atomizing it into extremely fine particles with high-speed airflow, and spraying it onto the surface of the workpiece at a high speed to form a coating. Different coating materials can be selected according to the needs. One or more performances in terms of wear resistance, corrosion resistance, oxidation resistance, and heat resistance. Thermal spraying is a surface strengthening technology and an important part of surface engineering technology. It has always been a new technology project that has been promoted in my country. It uses some kind of heat source (such as electric arc, plasma spraying or combustion flame, etc.) to heat powdery or filamentous metal or non-metallic materials to a molten or se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/02C23C4/129C23C4/18B24C1/10B24C1/06
CPCB24C1/06B24C1/10C23C4/02C23C4/18C23C4/129
Inventor 黄泽恩
Owner 华瑞(江苏)燃机服务有限公司
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