Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Nickel-based superalloy wear surface size repairing method

A technology of nickel-based superalloy and repair method, applied in metal material coating process, coating, fusion spraying and other directions, can solve the problems of narrow process parameter range, difficult process development, low coating thickness, etc. Low, reduce the difference in thermal expansion coefficient, increase the effect of wear resistance

Pending Publication Date: 2022-07-01
PLA NO 5719 FACTORY
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating porosity of this size repair method is less than 1%, and the coating is too dense, so that the coating thickness is low; at the same time, supersonic spraying is suitable for the preparation of tungsten carbide coatings, and the preparation of other metal coatings tends to produce more unmelted Particles, so the process development is difficult and the range of process parameters is narrow; in addition, the coating prepared by supersonic spraying has the characteristics of high cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nickel-based superalloy wear surface size repairing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] To repair the end face wear of the casing of a certain type of aero-engine gas turbine cover, the steps are as follows:

[0035] S1. Repair preprocessing.

[0036] First, turn the wear surface of the parts, so that the runout of the wear surface is not more than 0.10mm; secondly, wipe the end face after turning with acetone to remove oil and debris; thirdly, use high-temperature pressure-sensitive tape to repair the area outside the repaired area. The parts are shielded and protected before sandblasting; finally, the repaired area is sandblasted with 46-mesh white corundum sand to roughen the surface of the parts. The blasting pressure is 0.2MPa, and clean and dry compressed air is used after blasting. After blowing, the surface roughness of the repaired area was 3.2 μm.

[0037] S2. Plasma spraying NiAl powder is performed on the repaired area to form a bonding bottom layer.

[0038] NiAl powder is composed of 95.2% nickel and 4.8% aluminum by mass, and the powder pa...

Embodiment 2

[0043] To repair the end face wear of the casing of a certain type of aero-engine gas turbine cover, the steps are as follows:

[0044] S1. Repair preprocessing.

[0045] First, turn the wear surface of the parts, so that the runout of the wear surface is not more than 0.10mm; secondly, wipe the end face after turning with anhydrous ethanol to remove oil and debris; thirdly, use high temperature pressure-sensitive tape to repair the area. The other parts are shielded and protected before sandblasting; finally, the repaired area is sandblasted with 60-mesh white corundum sand to roughen the surface of the parts. The blasting pressure is 0.3MPa. Compressed air was blown clean, and the surface roughness of the repaired area was 3.6 μm.

[0046] S2. Plasma spraying NiAl powder is performed on the repaired area to form a bonding bottom layer.

[0047] The NiAl powder is composed of 95.4% nickel and 4.6% aluminum by mass, and the powder particle size is 45-90 μm. The parameters o...

Embodiment 3

[0052] To repair the end face wear of the casing of a certain type of aero-engine gas turbine cover, the steps are as follows:

[0053] S1. Repair preprocessing.

[0054] First, turn the wear surface of the parts, so that the runout of the wear surface is not more than 0.10mm; secondly, wipe the end face after turning with acetone to remove oil and debris; thirdly, use tooling and high-temperature pressure-sensitive adhesive to repair the area. The other parts are shielded and protected before sandblasting; finally, the repaired area is sandblasted with 60-mesh white corundum sand to roughen the surface of the parts, and the sandblasting pressure is 0.4MPa. Compressed air was blown clean, and the surface roughness of the repaired area was 3.8 μm.

[0055] S2. Plasma spraying NiAl powder is performed on the repaired area to form a bonding bottom layer.

[0056] NiAl powder is composed of 95.0% nickel and 5.0% aluminum by mass, and the powder particle size is 45-90 μm. The pa...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
surface roughnessaaaaaaaaaa
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for repairing the size of a nickel-based superalloy wear surface, relates to the field of aero-engine maintenance, and aims to repair the size of a wear surface of a part made of a nickel-based superalloy material. According to the technical scheme, the nickel-based high-temperature alloy abrasion surface size repairing method comprises the steps that S1, repairing pretreatment is conducted, specifically, the abrasion surface of a part is cleaned, shielding protection before sand blasting is conducted on the portion outside a repairing area, and then sand blasting coarsening is conducted on the repairing area; s2, NiAl powder is subjected to plasma spraying on the repaired area, and a bonding bottom layer is formed; s3, CoCrNiW powder is subjected to plasma spraying on the bonding bottom layer, and a working face layer is formed; and S4, the repaired area is machined, so that the thickness and the surface roughness of the coating meet the technological requirements. The method is used for carrying out size repair on the worn surface of the part made of the nickel-based superalloy material, for example, the method is used for carrying out size repair on the end face of a shell of an outer cover of a gas turbine of an aero-engine.

Description

technical field [0001] The invention relates to the field of aero-engine maintenance, in particular to a method for dimensionally repairing the wear surface of a nickel-based superalloy by means of plasma spraying. Background technique [0002] The shell of the aero-engine gas turbine cover is a nickel-based superalloy, which is installed outside the gas turbine rotor, and the outer ring block is fixed to protect the gas turbine rotor. During the service process of the aero-engine, the end face of the casing is prone to wear with the mating surface, resulting in out of tolerance. In order to meet the requirements of the continued use of aero-engine parts and reduce production costs and cycle, it is necessary to repair the size of the worn parts to ensure the assembly requirements of the parts. [0003] To repair the wear surface of superalloy parts, surfacing method is usually used, such as argon arc welding or laser cladding to repair wear, but the problems of deformation ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134C23C4/02C23C4/067C23C4/08C23C4/18
CPCC23C4/134C23C4/08C23C4/067C23C4/02C23C4/18
Inventor 叶俊华程小红陈凌云郭双全陈新悦李剑平潘钢
Owner PLA NO 5719 FACTORY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com