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Surface alloying method for high current pulse electron beam irradiation TC4 titanium alloys

A technology of electron beam irradiation and surface alloying, which is applied in the field of titanium alloy surface alloying, can solve the problems of poor wear resistance and low hardness of TC4 titanium alloy, so as to slow down the oxidation rate, improve the oxidation resistance and increase the strength Effect

Inactive Publication Date: 2018-12-14
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the two main problems of low hardness and poor wear resistance of TC4 titanium alloy, the purpose of the present invention is to provide a surface alloying modification method with low production cost, simple operation, short process cycle and high efficiency, so as to improve TC4 Surface properties of titanium alloys to extend their service life

Method used

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  • Surface alloying method for high current pulse electron beam irradiation TC4 titanium alloys
  • Surface alloying method for high current pulse electron beam irradiation TC4 titanium alloys
  • Surface alloying method for high current pulse electron beam irradiation TC4 titanium alloys

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of alloyed modified layer:

[0030] In the first step, the annealed industrial TC4 titanium alloy bar is selected, and the sample is made into a sample of Φ12×5mm by a wire cutting machine tool.

[0031] The surface of the sample was polished with 150, 400, 800, 1000, 1500, 2000 and 2500 mesh metallographic sandpaper, respectively. Among them, the diamond polishing agent with a particle size of 0.5 μm is selected as the polishing agent, and finally cleaned by ultrasonic cleaning with acetone and absolute ethanol before use.

[0032] In the second step, the Cr powder and the organic binder are mixed uniformly at a ratio of 9g / 100mL to prepare a slurry, and finally the slurry is uniformly coated on the surface of the sample after ultrasonic cleaning to form a coating layer, and the thickness of the coating layer is 78 μm, dry in air.

[0033] The third step is to fix the sample with the coating layer facing up, and place it on the "HOPE-1" type pulsed el...

Embodiment 2

[0039] (1) Preparation of alloyed modified layer:

[0040] In the first step, the annealed industrial TC4 titanium alloy bar is selected, and the sample is made into a sample of Φ12×5mm by a wire cutting machine tool.

[0041] The surface of the sample was polished with 150, 400, 800, 1000, 1500, 2000 and 2500 mesh metallographic sandpaper, respectively. Among them, the diamond polishing agent with a particle size of 0.5 μm is selected as the polishing agent, and finally cleaned by ultrasonic cleaning with acetone and absolute ethanol before use.

[0042] In the second step, the Cr powder and the organic binder are mixed uniformly at a ratio of 9g / 100mL to prepare a slurry, and finally the slurry is uniformly coated on the surface of the sample after ultrasonic cleaning to form a coating layer, and the thickness of the coating layer is 78 μm, dry in air.

[0043] The third step is to fix the sample with the coating layer facing up, and place it on the "HOPE-1" type pulsed el...

Embodiment 3

[0049] (1) Preparation of alloyed modified layer:

[0050] In the first step, the annealed industrial TC4 titanium alloy bar is selected, and the sample is made into a sample of Φ12×5mm by a wire cutting machine tool.

[0051] The surface of the sample was polished with 150, 400, 800, 1000, 1500, 2000 and 2500 mesh metallographic sandpaper, respectively. Among them, the diamond polishing agent with a particle size of 0.5 μm is selected as the polishing agent, and finally cleaned by ultrasonic cleaning with acetone and absolute ethanol before use.

[0052] In the second step, the Cr powder and the organic binder are uniformly mixed at a ratio of 9g / 100mL to prepare a slurry, and finally it is uniformly coated on the surface of the sample after ultrasonic cleaning to form a coating layer, and the thickness of the coating layer is 78 μm , placed in the air to dry.

[0053] The third step is to fix the sample with the coating layer facing up, and place it on the "HOPE-1" type pu...

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Abstract

The invention relates to a treatment method for titanium alloy surface alloying and particularly relates to a surface alloying method for high current pulse electron beam irradiation TC4 titanium alloys. According to the method disclosed by the invention, the sample surface is subjected to alloying treatment by adopting novel energetic beam surface modification technology-high current pulse electron beams, and by adjusting the injection energy, pulse width, irradiation times and other parameters, the sample surface can be modified in a wide range so as to enable the surface performance to reach an optimized state. According to the energetic beam instantaneous action with extremely high energy, processes of shock heating freezing and directional freezing simultaneously occur on the coatingand matrix surfaces, so that the coating element and the matrix are fully and uniformly mixed so as to perform metallurgical bonding, and an alloying layer with special performance and uniform component distribution is further formed on the surface.

Description

technical field [0001] The invention relates to a treatment method for surface alloying of titanium alloy. Specifically, a layer of alloyed layer with high wear resistance and excellent corrosion resistance is prepared on the surface of TC4 titanium alloy through the combination of pre-coating and high-current pulsed electron beam irradiation technology, which belongs to the surface modification of metal materials. technical field. Background technique [0002] TC4(Ti 6 al 4 V) alloy is a medium-strength α+β-type two-phase titanium alloy, due to its good comprehensive properties, such as high strength, no ferromagnetism, low density, good corrosion resistance, excellent processability and good biocompatibility . Therefore, TC4 titanium alloy is widely used in aerospace, ship and navigation, biomedicine, automobile manufacturing and other fields. However, in practical applications, there are still some problems related to surface properties, such as low hardness, poor we...

Claims

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Application Information

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IPC IPC(8): C23C24/10
CPCC23C24/106
Inventor 杨洋姚欣雯李绍伟葛瑞泽关庆丰吕鹏
Owner JIANGSU UNIV
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