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Method for preparing high-purity corrosion-resistant aluminum coating on titanium alloy component

A titanium alloy and aluminum coating technology, which is applied in the field of titanium alloy parts processing, can solve the problem that the thickness, bonding force, density and coating temperature cannot meet the comprehensive performance requirements of the coating layer of titanium alloy parts at the same time, and affect the coating and parts. Bonding properties, changes in the structure of titanium alloy parts, etc., to achieve the effects of enhanced bonding, reduced porosity and stress, and high density

Active Publication Date: 2010-11-24
GUIZHOU AEROSPACE PRECISION PRODS
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Problems solved by technology

As the thickness of the coating increases, the possibility of preventing external corrosion will increase, but the increase in thickness will seriously affect the bonding performance of the coating and the parts, cracking and peeling of the coating will occur, and the temperature of the parts will be increased, causing Microstructure Changes of Titanium Alloy Parts
In order to avoid this phenomenon, people have studied various methods to prepare aluminum coatings on different parts, but the prepared aluminum coatings cannot meet the requirements of titanium alloy parts coating in terms of thickness, bonding force, density, coating temperature, etc. at the same time. Comprehensive performance requirements of cladding

Method used

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  • Method for preparing high-purity corrosion-resistant aluminum coating on titanium alloy component

Examples

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Embodiment 1

[0023] Embodiment 1: A kind of method for preparing high-purity corrosion-resistant aluminum coating on titanium alloy parts, adopts high-power intermediate frequency magnetron sputtering equipment to carry out, and its concrete practice is:

[0024] A. Cleaning Put 800 pieces of titanium alloy parts after ultrasonic degreasing and drying in a vacuum chamber, use 99.9% pure aluminum as the target material, close the vacuum chamber, and when the vacuum is evacuated to 3.6×10~3Pa, pass in argon gas , so that the air pressure in the vacuum chamber reaches 1-2 Pa, turn on the bias power supply, apply a bias voltage of -1500V to the part, glow discharge to form argon plasma, and clean the part by argon plasma sputtering for 10 minutes; turn on the target power supply;

[0025] B. After the deposited aluminum coating is cleaned, adjust the argon pressure, the pressure is 0.5×10~1Pa--6×10~1Pa argon; add a negative bias of -200V to the part, turn on the target sputtering power supply,...

Embodiment 2～10

[0029] The methods of Examples 2-10 are basically the same as those of Example 1. The difference is that during the deposition of the aluminum coating, the bias voltage amplitude of the parts is set differently, the sputtering current and the deposition time are different, and the thickness obtained by deposition is different. Its specific values ​​are shown in the table below:

[0030] The parameter setting of embodiment 2~10 deposited aluminum coating

[0031]

[0032] Note: The coating thickness is measured with a micrometer (0.001mm) at the part thread end 1cm away from the rod diameter, and the diameter of the rod before and after coating is measured, and then subtracted to obtain the average value.

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Abstract

The invention discloses a method for preparing a high-purity corrosion-resistant aluminum coating on a titanium alloy component. The method comprises the following steps by adopting high-power intermediate frequency magnetron sputtering equipment: removing oil strain from the surface of a component; performing argon plasma sputter cleaning on the component; and depositing an aluminum coating, wherein the component is the titanium alloy component. Comprehensive properties such as coating thickness, density, binding force, coating temperature and the like are adjusted by adjusting different process parameters; and a layer of aluminum coating with high comprehensive properties is deposited on the surface of the titanium alloy component so that aluminum coatings formed on the two sides of the titanium alloy component have the comprehensive properties.

Description

technical field [0001] The invention relates to a method for preparing a high-purity corrosion-resistant aluminum coating on titanium alloy parts, belonging to the technical field of titanium alloy parts processing. Background technique [0002] Due to its light weight and good fatigue resistance, titanium alloy parts are widely used in the aerospace field. However, due to the complex working environment and large temperature range of the parts on aerospace vehicles, there are extremely strict requirements on the corrosion resistance of titanium alloys. In order to improve the corrosion resistance of titanium alloys without affecting the metallographic structure inside titanium alloy parts, the usual practice is to prepare a layer of aluminum coating on the surface of titanium alloy parts at a temperature of 300-400 °C. The corrosion resistance of aluminum coating is determined by its thickness and density, and the coating preparation temperature is determined by the coatin...

Claims

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Application Information

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IPC IPC(8): C23C14/35C23C14/16C23C14/02C23C14/58B08B3/12
Inventor 陈畅子胡隆伟詹兴刚
Owner GUIZHOU AEROSPACE PRECISION PRODS
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