Method for repairing turbine guide using laser additive

A turbine guide, laser additive technology, applied in the direction of additive processing, process efficiency improvement, energy efficiency, etc., can solve the problems of blade oxidation and corrosion, parts deformation, easy to burn out, etc., to achieve fast repair speed, Good repair quality and strong bonding effect

Inactive Publication Date: 2020-01-10
航发优材(镇江)增材制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The turbine guide is composed of guide vanes and inner and outer rings. Its working conditions are harsh. The first stage guide is close to the outlet of the combustion chamber. The guide vanes are surrounded by high-temperature gas flow and are one of the parts with the highest temperature in the engine. The temperature is high and uneven, and it is easy to burn out; the free oxygen and sulfur in the gas will have a strong oxidation and corrosion effect on the surface of the blade; Fatigue cracks, direct scrapping will increase economic costs, it is necessary to repair and reuse damaged parts
[0003] The traditional repair methods mostly use argon arc welding, gas shielded welding and other repair welding methods, which are prone to defects such as deformation of repaired parts and cracks in the repaired area.

Method used

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  • Method for repairing turbine guide using laser additive
  • Method for repairing turbine guide using laser additive

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Experimental program
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Effect test

Embodiment 1

[0026] The turbine guider is repaired by laser additive repair method, and the matrix material is GH3536 alloy.

[0027] This embodiment includes the following steps:

[0028] After the repairable evaluation of the damaged part is determined to be repairable, laser additive repair is carried out, and the following specific steps are implemented:

[0029] S1. Perform fluorescence detection on the damaged guide and take pictures to record the defect location; specifically, use the fluorescence detection guide, focus on observing the blade wear and outer ring wear, and take pictures to record the defect position;

[0030] S2. Clean the surface of the guide, remove defects with a grinding gun under fluorescent light, polish off the wear layer and oxide layer with a file and sandpaper, and then put it into an ultrasonic cleaner for 10 minutes to remove oil stains and grinding debris that affect the repair quality , and possible residual fluorescent liquid, and then dried by compre...

Embodiment 2

[0041] The turbine guider is repaired by laser additive repair method, and the matrix material is GH3536 alloy.

[0042] This embodiment includes the following steps:

[0043] After the repairable evaluation of the damaged part is determined to be repairable, laser additive repair is carried out, and the following specific steps are implemented:

[0044] S1. Perform fluorescence detection on the damaged guide and take pictures to record the defect location; specifically, use the fluorescence detection guide, focus on observing the blade wear and outer ring wear, and take pictures to record the defect position;

[0045] S2. Clean the surface of the guide, remove defects with a grinding gun under fluorescent light, polish off the wear layer and oxide layer with a file and sandpaper, and then put it into an ultrasonic cleaner for 10 minutes to remove oil stains and grinding debris that affect the repair quality , and possible residual fluorescent liquid, and then dried by compre...

Embodiment 3

[0056] The turbine guider is repaired by laser additive repair method, and the matrix material is GH3536 alloy.

[0057] This embodiment includes the following steps:

[0058] After the repairable evaluation of the damaged part is determined to be repairable, laser additive repair is carried out, and the following specific steps are implemented:

[0059]S1. Perform fluorescence detection on the damaged guide and take pictures to record the defect location; specifically, use the fluorescence detection guide, focus on observing the blade wear and outer ring wear, and take pictures to record the defect position;

[0060] S2. Clean the surface of the guide, remove defects with a grinding gun under fluorescent light, polish off the wear layer and oxide layer with a file and sandpaper, and then put it into an ultrasonic cleaner for 10 minutes to remove oil stains and grinding debris that affect the repair quality , and possible residual fluorescent liquid, and then dried by compres...

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Abstract

The invention provides a method for repairing a turbine guide using laser additive. The method comprises the following steps of S1, carrying out fluorescence detection on a damaged guide and photographing and recording a defect position; S2, cleaning the surface of the guide, grinding an area to be repaired, removing a wear layer, a fatigue layer, an oxide layer and other impurities; S3, confirming the size of the area to be repaired according to three-dimensional scanning and combining a drawing; S4, analyzing and confirming the material of the repairing area by an alloy analyzer; S5, developing a repairing process, specifically, confirming the repairing sequence, designing a reasonable tool, repairing parameters of the laser additive and powder type; S6, carrying out machining and quality inspection, specifically, machining the repaired area to make the size, shape precision and surface quality to meet the technical requirements, and carrying out X-ray detection on the repaired areato detect whether a defect exists or not. According to the method for repairing the turbine guide using the laser additive, the repairing quality is good, the repairing speed is high, the efficiency is high, an interface between the repairing area and a base body is metallurgically bonded, the binding force is strong, and the deformation is small.

Description

technical field [0001] The invention relates to the technical field of additive repair of thin-walled metal components, in particular to a method for laser additive repair of a turbine guide. Background technique [0002] The turbine guide is composed of guide vanes and inner and outer rings. Its working conditions are harsh. The first stage guide is close to the outlet of the combustion chamber. The guide vanes are surrounded by high-temperature gas flow and are one of the parts with the highest temperature in the engine. The temperature is high and uneven, and it is easy to burn out; the free oxygen and sulfur in the gas will have a strong oxidation and corrosion effect on the surface of the blade; Fatigue cracks, direct scrapping will increase economic costs, and it is necessary to repair and reuse damaged parts. [0003] The traditional repair methods mostly use argon arc welding, gas shielded welding and other repair welding methods, which are prone to defects such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F7/06B23P6/00B33Y10/00
CPCB22F7/062B23P6/007B33Y10/00B22F10/00B22F10/36B22F10/38B22F10/34B22F10/64B22F10/50B22F10/322Y02P10/25
Inventor 李鹏飞张峰孙兵兵
Owner 航发优材(镇江)增材制造有限公司
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