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A method for preparing a high-temperature-resistant high-damping composite coating on the surface of an aerospace alloy

An aerospace alloy and composite coating technology, which is applied to the surface coating liquid device, metal material coating process, coating, etc., can solve the problems of increased thermal stress and reduced processing efficiency, and achieves increased elastic modulus, Effect of improving bonding strength and improving elastic recovery performance

Active Publication Date: 2019-04-02
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will inevitably cause an increase in thermal stress, and later heat treatment is required, which greatly reduces processing efficiency.

Method used

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  • A method for preparing a high-temperature-resistant high-damping composite coating on the surface of an aerospace alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1: Grind and polish the surface of the TC6 titanium alloy sample (120mm×25mm×2mm), and use alcohol as a solvent to clean it ultrasonically for 20 minutes, then take it out and dry it naturally;

[0033] Step 2: Mix butyl rubber and chlorinated butyl rubber according to a certain ratio for 90 seconds, then add various auxiliary materials and mix for 120 seconds, and finally add sulfur, mix for 60 seconds to vulcanize and form, and refine to form a viscoelastic high-damping coating; The viscoelastic high damping coating is coated on the surface of the sample as an absorbing layer, and K9 glass is used as a constrained layer for laser micro-modeling. The micro-modeling area is 100mm×15mm and the depth is 80um. The pit is a square with a side length of 100um, and the overlap rate is 10%;

[0034] Step 3: Repeatedly coat the viscoelastic high damping paint on the laser micro-sculpting area with a coating thickness of 80um, keep the coated surface smooth and clean, and t...

Embodiment 2

[0040] Step 1: Grind and polish the surface of the 2024-T351 aluminum alloy sample (120mm×25mm×2mm), and use alcohol as a solvent to clean it ultrasonically for 20 minutes, then take it out and dry it naturally;

[0041] Step 2: Mix polyurethane and chlorinated butyl rubber according to a certain ratio for 120s, then add various auxiliary materials and mix for 120s, finally add sulfur, knead for 60s to vulcanize and form, and refine to form a viscoelastic high-damping coating; The prepared viscoelastic high damping coating is coated on the surface of the sample as an absorbing layer, and K9 glass is used as a constrained layer for laser micro-modeling. The micro-modeling area is 100mm×20mm and the depth is 50um. Among them, the micro-pit It is a circle with a diameter of 100um, and the overlap rate is 50%;

[0042] Step 3: Repeatedly coat the viscoelastic high damping paint on the laser micro-sculpting area with a coating thickness of 50um, keep the coated surface smooth and c...

Embodiment 3

[0048] Step 1: Grind and polish the surface of the IN718 nickel-based alloy sample (120mm×25mm×2mm), and use alcohol as a solvent to clean it ultrasonically for 20 minutes, then take it out and dry it naturally;

[0049] Step 2: Mix polyurethane and butyl rubber according to a certain ratio for 90s, then add various auxiliary materials and mix for 120s, and finally add sulfur, knead for 90s to vulcanize and form, and refine it into a viscoelastic high-damping coating; The viscoelastic high-damping coating is coated on the surface of the sample as an absorbing layer, and K9 glass is used as a constrained layer for laser micro-modeling. The micro-modeling area is 100mm×20mm and the depth is 100um. The micro-pit is 100um ×50um rectangle, the overlap rate is 20%;

[0050] Step 3: Repeatedly coat the viscoelastic high damping paint on the laser micro-sculpting area with a coating thickness of 100um, keep the coated surface smooth and clean, and then let it dry naturally;

[0051] ...

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Abstract

The invention provides a preparation method of a high-temperature-resistant and high-damping composite coating on the surface of an aviation alloy. Firstly, the surface of a sample is washed; then, the surface of the sample is coated with a viscoelastic high-damping coating and then subjected to laser micro-texturing; then, the viscoelastic high-damping coating is repeatedly sprayed on the area subjected to laser micro-texturing; a TiN transition coating is plated on the surface of the sample through a vacuum coating method; then, a TiAlN coating is then plated on the surface of the TiN transition coating, aluminum foil coated with nano-particles Si is pasted on the surface of the TiAlN coating, and laser shot peening strengthening processing is conducted; and finally, pulsed magnetic field strengthening processing is conducted on the sample. By means of the preparation method, the composite coating which is high in toughness, resistant to high temperature, high in damping coefficient and high in interface combination degree can be prepared, and meanwhile the elasticity modulus of the composite structure is improved; and high-amplitude residual compressive stress is introduced to the surface layer of a matrix, high-density dislocation and grain refinement are induced, and the metal damping and the vibration fatigue resistance property of the aviation alloy are further improved.

Description

technical field [0001] The invention relates to a preparation method of a metal material surface coating, in particular to a preparation method of a high-temperature-resistant high-damping composite coating on the surface of an aircraft alloy. Background technique [0002] With the rapid development of industries such as aerospace and transportation, the use and requirements of aerospace alloys are also getting higher and higher. Aviation alloys such as titanium alloys and aluminum alloys are widely used in the manufacture of key structural parts such as turbine engines and compressor blisks / blades due to their outstanding advantages such as high specific strength and strong corrosion resistance. However, due to the working characteristics of the engine itself, when the engine is working, the exciting force from the engine will cause the blades to vibrate forcibly. When the frequency of the exciting force is equal to the natural frequency of the blades, the blades will reson...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/06C23C14/02C23C14/58C23C10/30C23C10/60B05D7/14
CPCB05D7/14C23C10/30C23C10/60C23C14/024C23C14/028C23C14/0641C23C14/5846
Inventor 周建忠李京孙云辉黄舒孟宪凯徐家乐
Owner JIANGSU UNIV
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