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Preparation method of anti-heat-scouring coating on surface of titanium alloy

A titanium alloy and coating technology, applied in the field of surface treatment of materials, can solve problems such as increasing high temperature thermal shock resistance, achieve the effects of increasing surface area, high controllability, and enhancing interface bonding strength

Active Publication Date: 2019-08-09
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating can effectively increase the high-temperature thermal shock resistance and oxidation resistance of the substrate during use, solve the problem of thermal matching, and prevent stress concentration at the titanium alloy interface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The operation steps for preparing a high-temperature anti-erosion coating on the surface of a titanium alloy are as follows:

[0029] (1) Polish the surface of the titanium alloy substrate ①, clean the surface with acetone, alcohol, and deionized water, put it into the PVD equipment, turn on the vacuum system, and the vacuum of the back and bottom is higher than 10 -4 After Pa, the substrate was heated to 300°C, TiAl was used as the sputtering target, the target base distance was 30mm, Ar sputtering gas was introduced, the sputtering pressure was adjusted to 0.4Pa, the bias voltage was -250V, and the sputtering current density was 30mA / cm 2 , the sputtering time is 2h, and a 10μm dense TiAl bonding layer is coated on the surface of the titanium alloy substrate;

[0030] (2) Passing Ar gas and N 2 gas mixture, the sputtering pressure is 0.4Pa, the target base distance is 30mm, the bias voltage is -200V, and the sputtering current density is 20mA / cm 2 , using TiAl as ...

Embodiment 2

[0036] The operation steps for preparing a high-temperature anti-erosion coating on the surface of a titanium alloy are as follows:

[0037] (1) Polish the surface of the titanium alloy substrate ①, clean the surface with acetone, alcohol, and deionized water, put it into the PVD equipment, turn on the vacuum system, and the vacuum of the back and bottom is higher than 10 -4 After Pa, the substrate was heated to 600°C, TiAl was used as the sputtering target, the target base distance was 60mm, Ar sputtering gas was introduced, the sputtering pressure was adjusted to 0.8Pa, the bias voltage was -200V, and the sputtering current density was 40mA / cm 2 , the sputtering time is 1h, and a 7μm TiAl bonding layer is coated on the surface of the titanium alloy substrate;

[0038] (2) Passing Ar gas and N 2 Gas mixture, sputtering pressure 0.8Pa, target base distance 60mm, bias voltage -200V, sputtering current density 40mA / cm 2 , using TiAl as the sputtering target, gradient control...

Embodiment 3

[0044] The operation steps for preparing a high-temperature anti-erosion coating on the surface of a titanium alloy are as follows:

[0045] (1) Polish the surface of the titanium alloy substrate, clean the surface with acetone, alcohol, and deionized water, put it into the PVD equipment, turn on the vacuum system, and the background vacuum is higher than 10 -4 After Pa, the substrate is heated to 400°C, and Ti 3 Al is used as the sputtering target, the base distance of the target is 150mm, Ar sputtering gas is introduced, the sputtering pressure is adjusted to 1.2Pa, the bias voltage is -150V, and the sputtering current density is 20mA / cm 2 , sputtering time 3h, to achieve 10μm Ti coating on the surface of titanium alloy substrate 3 Al binding layer;

[0046] (2) Passing Ar gas and N 2 gas mixture, the sputtering pressure is 1.2Pa, the target base distance is 150mm, the bias voltage is -150V, and the sputtering current density is 20mA / cm 2 , using Ti 3 Al is used as the ...

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Abstract

The invention discloses a preparation method of an anti-heat-scouring coating on the surface of a titanium alloy. The method adopts gas-phase deposition equipment to conducting multi-time depositing on the surface of the titanium alloy to coat different components, the coatings of different texture structures effectively improves the high-temperature anti-heat-seismic performance and the antioxidant properties of a substrate in the using process, and the problem of heat matching is solved for preventing the stress concentration at the interface of the titanium alloy. The preparation method comprises the steps that 1, an interface binding layer is deposited on the surface of the titanium alloy; 2, a component gradient coating is deposited on the surface of the interface binding layer; 3, the texture gradient coating is prepared on the surface of the component gradient coating; and 4, an anti-wear composite coating is prepared on the surface of the texture gradient coating. The preparation method has the advantages that a PVD coating technology is adopted, the preparation of the four coatings of the different texture composition gradients is achieved, the heat scouring of the targetmaterials of various materials can be effectively prevented, and the operation is simple.

Description

technical field [0001] The invention relates to a preparation method or a vapor phase deposition method of a thermal erosion-resistant coating on the surface of a titanium alloy. The invention relates to stress concentration at the titanium alloy interface, which belongs to the technical field of material surface treatment. Background technique [0002] The heat-resistant erosion-resistant coating on the surface of titanium alloy for weaponry is the key to the long-term stable use of weaponry. The existing coatings are mainly ceramics, tungsten alloys, tantalum, etc., but the alloy coating has poor hardness and high-temperature erosion resistance. Layers are difficult to prepare and cannot meet the needs of weapons. [0003] Before 2000, high-temperature steel was used as the base material for the brake. In the 1970s, Cr was coated by electroplating. In the 1980s, the surface of the Cr coating was nitrided. In the 1990s, Ta, W, Ta / Cr, Ta-W and Ta-Cr coatings improve the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/16C23C14/06
CPCC23C14/0084C23C14/06C23C14/0641C23C14/165C23C14/345C23C14/35C23C14/352
Inventor 黄浩王敏涓李虎黄旭李臻熙
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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