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Re-manufacturing and repairing method for failed gas turbine blade

A technology for gas turbine blades and repair methods, which is applied in the direction of plating, coating, and metal material coating processes of superimposed layers, and can solve the problems of no improvement or improvement in the service life of blades

Inactive Publication Date: 2021-05-07
TIANJIN MECHANICAL COATING INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are limited to restoring the function of the blade, and have no or little improvement in the service life of the blade

Method used

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Experimental program
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Effect test

Embodiment Construction

[0013] The present invention will be further described below in conjunction with specific embodiments.

[0014] The present invention mainly involves three processes of laser cladding, shot peening, and plasma spraying, which are respectively introduced as follows:

[0015] Laser cladding process

[0016] Laser cladding process is a technology that has been widely used in recent years. Laser cladding refers to the rapid melting and solidification of selected coating materials on the surface of the cladding substrate in different ways under the irradiation of laser beams. Finally, a surface coating with extremely low dilution and metallurgical combination with the substrate is formed, which can significantly improve the wear resistance, corrosion resistance, heat resistance, and oxidation resistance of the base layer surface, thereby achieving the purpose of surface modification or repair. Compared with surfacing, spraying, electroplating and vapor deposition, laser cladding h...

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PUM

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Abstract

The invention discloses a re-manufacturing and repairing method for a failed gas turbine blade. The method is carried out according to the following steps that firstly, a laser cladding process is adopted, and size recovery is conducted on the failed gas turbine blade; then shot peening strengthening treatment is performed on the outer surface of the gas turbine blade completed in the first step, wherein glass beads are selected as shot peening materials, the diameter ranges from 0.8 mm to 1.2 mm, the shot peening pressure ranges from 0.4 MPa to 0.5 MPa, and the shot peening time ranges from 80s to 100s; and through shot peening treatment, a plasma spraying process is finally adopted for spraying the blade, wherein a spraying material is WC-12Co metal ceramic powder, the thickness of a spraying layer is 240-280 [mu]m at the windward side portion, and the thickness of the spraying layer is 180-220 [mu]m at the non-windward side portion. The gas turbine blade repaired through the process method has good abrasion resistance and corrosion resistance, and the service lifetime of the blade can be greatly prolonged and is 2-3 times that of an original blade.

Description

technical field [0001] The invention relates to the field of gas turbines, and more specifically, relates to a remanufacturing and repairing process for gas turbine blades. Background technique [0002] As an important power output device, gas turbine has been widely used in power generation, shipbuilding, aviation and other industries. Its core part is mainly composed of three parts: compressor (ie compressor), combustion chamber and turbine. The working process of the gas turbine is that the compressor continuously sucks in air from the atmosphere and compresses it; the compressed air enters the combustion chamber, mixes with the injected fuel and burns to become high-temperature gas, which then flows into the gas turbine to expand and do work, pushing The turbine wheel rotates with the compressor wheel, converting the chemical energy of the fuel into mechanical energy. [0003] Gas turbine blades are an important part of gas turbines. The gas produced by the mixed comb...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22F1/10C23C4/134C23C4/06C23C28/02
CPCC22F1/10C23C4/06C23C24/103C23C28/021C23C28/027C23C4/134
Inventor 时圣有顾洪武周杰邸宝永
Owner TIANJIN MECHANICAL COATING INST