Preparation method of a sealing coating with high resistance to spalling failure
A sealing coating, high-resistance technology, applied in coating, metal material coating process, fusion spraying and other directions, can solve problems such as spalling failure, falling blocks, etc., to extend service life, prevent spalling failure, and enhance shearing The effect of shear strength
Active Publication Date: 2017-02-22
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] In order to solve the above problems, the object of the present invention is to provide a method for preparing a sealing coating with high resistance to peeling and failure, which aims at the problem that traditional thermal spraying sealing coatings are prone to blockage and peeling failure.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0039] This embodiment provides a method for preparing a high resistance to peeling failure sealing coating, the preparation method comprising the following steps:
[0040] Use absolute ethanol or acetone to clean the substrate to be sprayed and dry it;
[0041] Put the sealing coating material powder into a heating furnace and heat it to 100°C for 1 hour, wherein the raw material composition of the sealing coating material includes: Co 24 Ni 16 Cr 6 Al 0.3 Y 7 BN 14 Polyester, the particle size is 176±7.8μm;
[0042] Place the cleaned substrate in the vacuum tank of the texturing equipment, set the texturing parameters, turn on the electron beam texturing equipment, vacuumize, and process the surface structure of the substrate. The schematic diagram of the structure is as follows figure 1 As shown, after the processing program is finished, the electron beam texturing equipment is turned off, the vacuum tank is opened, and the texturized substrate is taken out; among the...
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
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
Login to View More
Abstract
The invention provides a preparation method of a sealing coating with high peeling failure resistance. The preparation method comprises the following steps: carrying out structure shaping on the surface of a matrix by means of electron beam texturing or laser beam texturing, wherein the height of the structure shape is not less than 1 / 4 of the thickness of the coating; carrying out the thermal spraying deposition of a sealing coating material on the surface with the structure shape, of the matrix to obtain the sealing coating with high peeling failure resistance; the thermal spraying comprises the following steps: spraying by means of inclined rotary spraying, and carrying out coating deposition by means of vertical spraying after the deposition thickness of the coating achieves the height of the shape, that is, excesses the top of the shape. The preparation method provided by the invention is capable of increasing the contact area between the coating and the matrix, changing a laminated superposition structure, releasing the stress of the coating, and improving the peeling-resistant capacity of the sealing coating, thus the ingredients of the coating cannot be decomposed while the service life of the coating is prolonged.
Description
technical field [0001] The invention relates to a method for preparing a sealing coating, in particular to a method for preparing a sealing coating with high resistance to peeling and failure, and belongs to the technical field of coating preparation. Background technique [0002] For every 1% increase in the ratio of the tip clearance of the outer ring of the aero-engine turbine to the length of the blade, the loss of turbine efficiency will increase by 1-3%. Thermal spraying gas path sealing coating is one of the important ways to improve engine efficiency and performance and reduce fuel consumption First, it is one of the key manufacturing technologies of aero-engines. [0003] The working temperature of the sealing coating of the outer ring of the high-pressure turbine is above 1000°C, and at the same time, it must withstand the scour of supersonic gas and the scraping of the tip of the high-speed rotating turbine blade. The above working conditions require the sealing c...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/12C23C4/02C23C4/134
Inventor 李淑青杨伟华毛智勇王达望李其连周海滨
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST