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A method for repairing wear and cracks of blade crown and sealing teeth

A repair method and tooth sealing technology, which is applied in coating, metal material coating technology, etc., can solve the problems of reduced reliability of blades, shortened service life, and low pass rate, so as to reduce the amount of mechanical grinding and process The effect of stable quality and low dilution rate

Active Publication Date: 2022-04-08
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large heat input of TIG welding, the heat will reduce the performance, resulting in a decrease in the reliability of the blade and a shortened service life; secondly, TIG is a manual operation, and the process stability and product quality are greatly affected by human factors, and the pass rate is not high.

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  • A method for repairing wear and cracks of blade crown and sealing teeth
  • A method for repairing wear and cracks of blade crown and sealing teeth
  • A method for repairing wear and cracks of blade crown and sealing teeth

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Embodiment Construction

[0042] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative import...

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Abstract

The invention discloses a method for repairing wear and cracks of blade crowns and sealing teeth. Laser cladding technology is used to repair the worn parts of turbine blade crowns and sealing teeth and the cracks of blade crowns and sealing teeth. It can be cut and processed to restore its external dimensions to the original design geometric dimensions and technical indicators, and can be used again. Laser cladding has the characteristics of rapid melting. Compared with the conventional as-cast structure, the substructure of the laser cladding solidified structure is significantly refined, and a fine and uniform alloy structure can be obtained. The mechanical properties of the turbine blade after laser cladding repair are close to the forging standard.

Description

technical field [0001] The invention belongs to the technical field of aero-engine maintenance, and in particular relates to a method for repairing wear and cracks of blade crowns and sealing teeth. Background technique [0002] In order to improve the efficiency of turbine components and reduce the efficiency drop caused by gas leakage, the top of the turbine blade of an aero-engine is often designed with a crown structure, and the sealing teeth are designed on the crown part to cooperate with the honeycomb or soft coating on the outer ring of the turbine to form the blade tip The gap can minimize the leakage of gas along the blade tip during operation. The damage characteristics of the turbine blades during service are the wear of the crown and sealing teeth and the cracks of the crown and sealing teeth. For the damage within the scope of blade repair, the TIG welding (non-melting inert gas shielded arc welding) process is used. It is used again after it is repaired, proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C19/05B23P6/00
CPCC23C24/103C22C19/055C22C19/056B23P6/002
Inventor 王辉明温嵘朱红钢杨磊耿军儒魏颖李文涛张立辉
Owner AECC AVIATION POWER CO LTD
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