Method for preparing gradient nanostructure nitride layer on surface of titanium alloy

A nanostructure, surface gradient technology, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of effective control, etc., to achieve enhanced lubrication and wear resistance, effective shape and size, widening The effect of application range

Inactive Publication Date: 2017-03-08
NANJING INST OF TECH +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although nanotechnology has achieved many meaningful research results, the following problems still exist in soft metals, especially aerospace titanium alloys: 1) How to realize the effective modification of the structure and composition, morphology and size of the surface structure of soft metal materials; control; 2) how to develop more effective and

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  • Method for preparing gradient nanostructure nitride layer on surface of titanium alloy
  • Method for preparing gradient nanostructure nitride layer on surface of titanium alloy
  • Method for preparing gradient nanostructure nitride layer on surface of titanium alloy

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Embodiment 1

[0028] Such as Figure 1 ~ Figure 4 As shown, a method for preparing a gradient nanostructure nitride layer on the surface of a titanium alloy comprises the following steps:

[0029] (1) The titanium alloy is first subjected to vacuum high-temperature annealing treatment. The temperature of high-temperature annealing is 700-705 ° C, and the time is 1 hour. After the vacuum furnace is cooled to room temperature, the titanium alloy is taken out, and then the surface is polished to a smooth, smooth and smooth surface with a grinder. No scratches, then clean the surface with petroleum ether and alcohol, and dry it naturally for later use; wherein, the titanium alloy is (α+β) type TC4 titanium alloy, which consists of the following components and weight percentage content: Al 5.5wt %, V 3.5wt%, Fe 0.1wt%, C0.02wt%, N 0.01wt%, H 0.005wt%, O 0.1wt%, the balance being Ti.

[0030] (2) Install the ultrasonic rolling processing device, set the ultrasonic rolling process parameters, app...

Embodiment 2

[0035] Such as Figure 1 ~ Figure 4 As shown, a method for preparing a gradient nanostructure nitride layer on the surface of a titanium alloy comprises the following steps:

[0036](1) The titanium alloy is first subjected to vacuum high-temperature annealing treatment. The temperature of high-temperature annealing is 840-850°C for 4 hours. After cooling to room temperature in the vacuum furnace, the titanium alloy is taken out, and then the surface is polished to a smooth, smooth and smooth surface with a grinder. No scratches, then clean the surface with petroleum ether and alcohol, and dry it naturally for later use; wherein, the titanium alloy is (α+β) type TC4 titanium alloy, which consists of the following components and weight percentage content: Al 6.8wt %, V 4.5wt%, Fe 0.3wt%, C0.10wt%, N 0.05wt%, H 0.015wt%, O 0.2wt%, and the balance is Ti.

[0037] (2) Install the ultrasonic rolling processing device, set the ultrasonic deep rolling process parameters, apply lubri...

Embodiment 3

[0040] Such as Figure 1 ~ Figure 4 As shown, a method for preparing a gradient nanostructure nitride layer on the surface of a titanium alloy comprises the following steps:

[0041] (1) The titanium alloy is first subjected to vacuum high-temperature annealing treatment. The temperature of high-temperature annealing is 740-750°C for 2 hours. After cooling to room temperature in the vacuum furnace, the titanium alloy is taken out, and then the surface is polished to a smooth, smooth and smooth surface with a grinder. No scratches, then clean the surface with petroleum ether and alcohol, and dry it naturally for later use; wherein, the titanium alloy is a (α+β) type TC4 titanium alloy, which consists of the following components and weight percentages: Al 6.0wt %, V 3.8wt%, Fe 0.15wt%, C 0.04wt%, N 0.02wt%, H 0.008wt%, O 0.14wt%, and the balance is Ti.

[0042] (2) Install the ultrasonic deep rolling processing device, set the ultrasonic deep rolling process parameters, apply l...

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Abstract

The invention discloses a method for preparing a gradient nanostructure nitride layer on the surface of a titanium alloy. The method comprises following steps: S01, the titanium alloy is subject to pretreatment; S02, the surface of the titanium alloy is subject to ultrasonic deep rolling nanocrystallization processing treatment, wherein the surface of the titanium alloy treated in the S01 is painted with lubricating oil, ultrasonic deep rolling nanocrystallization processing treatment is carried out, and a gradient nanostructure metal layer is prepared on the surface of the titanium alloy; S03, the surface of the titanium alloy is subject to glow ion nitriding treatment, and the gradient nanostructure nitride layer on the surface of the titanium alloy is obtained. According to the method for preparing the gradient nanostructure nitride layer on the surface of the titanium alloy, the prepared titanium alloy has the lubricating, wear resistance, corrosion resistance and fatigue-resisting properties, and effective control over the structure, the composition, the morphology and the size of a soft metal material surface texture is achieved.

Description

technical field [0001] The invention relates to a method for preparing a gradient nanostructure nitride layer on the surface of a titanium alloy, belonging to the technical field of metal surface processing and modification. Background technique [0002] Surface nanotechnology has become a new direction for the development and surface treatment of new metal materials because it can significantly improve the microstructure and properties of materials. With the continuous progress of research, this technology has been widely used in the fields of iron and steel and metallurgy, surface engineering and aerospace. The application of nanotechnology in the field of aerospace is mainly reflected in the performance improvement of some components, such as cermets containing 20% ​​ultrafine cobalt particles can be used in rocket nozzles; the life and reliability of the liquid bearing are improved after treatment. Substantial improvement; the metal material through grain refinement can...

Claims

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Application Information

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IPC IPC(8): C23C8/36C23C8/24C23C8/02C22F1/02C22F1/18C23F17/00C22C14/00
CPCC22C14/00C22F1/02C22F1/183C23C8/02C23C8/24C23C8/36C23F17/00
Inventor 张保森宋敏王章忠巴志新程江波董强胜成浩柴聘聘
Owner NANJING INST OF TECH
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