Coating thermal spraying process for turbine movable vanes of gas turbine

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...

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.