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Titanium alloy surface composite coating and preparation method and application thereof

A surface compounding and titanium alloy technology, which is applied in the direction of metal material coating process, coating, superimposed layer plating, etc., can solve the problems that cannot meet the composite functions of flame retardancy, heat insulation and infrared stealth

Inactive Publication Date: 2018-07-10
CHINESE ACAD OF AGRI MECHANIZATION SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a titanium alloy surface composite coating and its preparation method and application to solve the problem that the titanium alloy surface modification cannot meet the composite functions of flame retardancy, heat insulation and infrared stealth in the prior art

Method used

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  • Titanium alloy surface composite coating and preparation method and application thereof
  • Titanium alloy surface composite coating and preparation method and application thereof

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preparation example Construction

[0036] The present invention also provides a preparation method of the titanium alloy surface composite coating, comprising the following steps:

[0037]Depositing Ti on the Surface of Titanium Alloy Substrate by Electrospark Deposition 40 Zr 25 Ni 3 Cu 12 be 20 , forming a flame retardant coating;

[0038] Adopt plasma spraying method to spray ZrO on the surface of the flame retardant coating 2 -Y 2 o 3 , forming a thermal insulation coating;

[0039] A diamond-like DLC coating is prepared on the surface of the heat-shielding coating by a plasma-enhanced chemical vapor deposition method, and used as an infrared stealth coating to obtain a titanium alloy surface composite coating.

[0040] The present invention adopts electric spark deposition method to deposit Ti on the surface of titanium alloy matrix 40 Zr 25 Ni 3 Cu 12 be 20 , forming a flame retardant coating. In the present invention, it is preferable to use alcohol to clean the surface of the titanium allo...

Embodiment 1

[0067] Clean the titanium alloy surface with alcohol in an ultrasonic cleaning pool, wash for 5 minutes and then blow dry;

[0068] Deposition of Ti on Titanium Alloy Surface by Electrospark Deposition 40 Zr 25 Ni 3 Cu 12 be 20 , forming a flame-retardant coating with a thickness of 0.15mm, the deposition process is carried out in an argon atmosphere, the flow rate of argon is 20L / min, and the voltage is set to 60V, the frequency is 2KHz, and the discharge capacitance is from 40μF, 80μF, 120μF increases step by step, and then decreases step by step, the deposition time is 5min / cm 2 ;

[0069] Obtain a flame-retardant coating and sandblast the flame-retardant coating to obtain a coating with a surface roughness of 6-8 μm, and spray Ni-22wt%Cr-6wt% with a thickness of 0.08mm by supersonic flame spraying Al-2wt%Y transition coating; in the process of supersonic flame spraying, the base material is Ni-22wt%Cr-6wt%Al-2wt%Y; the fuel is kerosene, the flow rate of kerosene is c...

Embodiment 2

[0082] Clean the titanium alloy surface with alcohol in an ultrasonic cleaning pool, wash for 5 minutes and then blow dry;

[0083] Deposition of Ti on Titanium Alloy Surface by Electrospark Deposition 40 Zr 25 Ni 3 Cu 12 be 20 , forming a flame-retardant coating with a thickness of 0.1mm, the deposition process is carried out in an argon atmosphere, the flow rate of argon is 20L / min, and the voltage is set to 60V, the frequency is 2KHz, and the discharge capacitance is from 40μF to 80μF , 120μF increases step by step, and then decreases to 40μF step by step, the specific deposition time is 5min / cm 2 ;

[0084] Obtain a flame-retardant coating and sandblast the flame-retardant coating to obtain a coating with a surface roughness of 6-8 μm, and spray Ni-22wt%Cr-6wt% Ni-22wt%Cr-6wt% with a thickness of 0.10mm by a supersonic flame spraying method Al-2wt%Y transition coating; in the supersonic flame spraying process, the matrix material is Ni-22wt%Cr-6wt%Al-2wt%Y; the fuel ...

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Abstract

The invention provides a titanium alloy surface composite coating. The titanium alloy surface composite coating comprises a flame retardant coating arranged on the surface of a titanium alloy matrix,a heat insulation coating arranged on the upper surface of the flame retardant coating and an infrared stealth coating arranged on the upper surface of the heat insulation coating; the flame retardantcoating is made of Ti40Zr25Ni3Cu12Be20; the heat insulation coating is made of ZrO2-Y2O3; and the infrared stealth coating is a diamond-like DLC coating. The composite coating has the functions of flame retardancy, heat insulation and infrared stealth, and meanwhile, the composite coating also shows excellent thermal shock resistance. The invention further provides a preparation method for the titanium alloy surface composite coating and application of the titanium alloy surface composite coating to aviation components.

Description

technical field [0001] The invention relates to the field of titanium alloy surface modification, in particular to a titanium alloy surface composite coating and a preparation method and application thereof. Background technique [0002] Due to its high specific strength and specific modulus, low density, and strong damage resistance, titanium alloys have great application prospects in aerospace components such as compressor casings and blades of advanced aero-engines. However, due to the high temperature environment, titanium alloys will catch fire and burn when subjected to severe friction, and will spread rapidly, resulting in titanium fire accidents, which seriously restricts the application of titanium alloys in advanced aero-engines. At the same time, in recent years, infrared detection and guidance technology has been developed rapidly. For example, the forward detection range of the airborne infrared search and track system (IRST) for fighter jets has reached about 1...

Claims

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Application Information

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IPC IPC(8): C23C28/00C23C26/02C22C30/02C23C4/134C23C4/11C23C16/50C23C16/27C23C4/129C23C4/073
CPCC22C14/00C22C30/02C23C4/073C23C4/11C23C4/129C23C4/134C23C16/27C23C16/50C23C26/02C23C28/321C23C28/3215C23C28/343C23C28/3455
Inventor 汪瑞军马小斌詹华王亦奇鲍曼雨
Owner CHINESE ACAD OF AGRI MECHANIZATION SCI
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