Fretting-wear-resistant coating of Z-shaped contact surface of turbine blade and process of fretting-wear-resistant coating

Abstract

The invention discloses a fretting-wear-resistant coating of a Z-shaped contact surface of a turbine blade and a process of the fretting-wear-resistant coating. The fretting-wear-resistant coating comprises a turbine blade layer and a chromium carbide wear-resistant coating. The process comprises the following steps that 1, finishing is carried out, wherein a to-be-sprayed surface of a blade is moderately finished by adopting finishing equipment; 2, cleaning operation is carried out, and oil stains and dirt on the surface are removed; 3, checking is carried out, wherein the blade treated after the step 2 is weighed and checked before spraying, and the weight and the thickness are measured after the blade is qualified, and are recorded; 4, surface roughening is carried out; 5, high-speed flame spraying coating operation of the coating is carried out; and 6, visual inspection and size inspection of the surface of the coating are carried out. The problem of fretting wear caused by vibration contact of the turbine blade in a high-temperature operation environment is solved, material loss of a blade crown contact surface is avoided, the blade breakage risk is reduced, the service life of the blade is prolonged while the defect generation rate is reduced, and a guarantee is provided for safe and reliable operation of a turbine assembly of a gas turbine.

Description

technical field [0001] The invention relates to a fretting wear-resistant coating for a Z-shaped contact surface of a turbine blade and a process thereof, and belongs to the technical field of a nickel-based turbine blade wear-resistant coating for gas turbines. Background technique [0002] The turbine blades of the gas turbine are in high-temperature, high-speed and vibrating operation state for a long time, and the Z-shaped contact surface of a row of blades with the blade shroud is in contact for a long time, which is very prone to fretting wear and the resulting material defects. After long-term operation in harsh environments , it is prone to serious wear and even block loss, and even breakage of the blades, which may cause serious failure of the unit. Contents of the invention [0003] In view of the above-mentioned problems in the prior art, the present invention provides a fretting wear-resistant coating and its technology on the Z-shaped contact surface of a turb...

AI Technical Summary

Problems solved by technology

[0002] The turbine blades of the gas turbine are in high-temperature, high-speed and vibrating operation state for a long time, and the Z-shaped contact surface of a row of blades with the blade shroud is in contact for a long time, which is very prone to fretting wear and the resulting material defects. After long-term operation in harsh environments , it is prone to serious wear and even block loss, and even breakage of the blades, which may cause serious failure of the unit

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