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Laser preparation method of titanium-nitride-coating-contained textured surface of titanium alloy

A titanium alloy and texturing technology, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve the gap in wear resistance of composite coatings, limited wear resistance, and the degree of improvement in material surface hardness. Large and other problems, to achieve the effect of improving surface wear resistance, improving corrosion resistance, enhancing surface hardness and wear resistance

Active Publication Date: 2017-11-14
JINAN UNIVERSITY
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Problems solved by technology

However, simple surface texturing has no effect on the chemical composition of the material surface, so that the hardness of the material surface is not greatly improved, and the wear resistance of the material is limited only from the perspective of reducing the friction factor. There is a big gap in the improvement of sex
Laser surface texturing and laser gas nitriding technologies respectively propose methods to improve the wear resistance of materials from the perspective of reducing the friction coefficient and preparing composite coatings. However, both processes have their own limitations. Therefore, how to further improve the laser nitrogen It is of great significance to improve the wear resistance of the material while ensuring the hardness of the titanium alloy.

Method used

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  • Laser preparation method of titanium-nitride-coating-contained textured surface of titanium alloy
  • Laser preparation method of titanium-nitride-coating-contained textured surface of titanium alloy
  • Laser preparation method of titanium-nitride-coating-contained textured surface of titanium alloy

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Embodiment 1

[0044] 1. The Ti-35Nb-7Zr-5Ta biomedical titanium alloy sample with a size of 15×15×2mm was laser-prepared with a biomedical titanium alloy containing titanium nitride coating textured surface. The specific steps are as follows:

[0045] (1) First, the surface of the biomedical titanium alloy substrate is polished with sandpaper from 240#, 400#, 800#, 1200#, 1500#, 2000# in sequence, and mechanically polished, and then ultrasonically cleaned in absolute ethanol for 10 Minutes (ultrasonic frequency 40KHz), dry with a hair dryer with cold air for later use.

[0046] (2) Put the titanium alloy sample on the temperature-controllable heating furnace and place it on the laser processing workbench. First heat the sample to 300°C, then turn on the gas switch, and fill the surface of the sample with high-purity nitrogen gas with a flow rate of 15L / min, then turn on the pulse laser (Nd:YAG pulse laser), and perform laser scanning according to the preset laser parameters and numerical c...

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Abstract

The invention discloses a laser preparation method of a titanium-nitride-coating-contained textured surface of titanium alloy. According to the laser preparation method of the titanium-nitride-coating-contained textured surface of the titanium alloy, firstly, surface pretreatment is conducted on the titanium alloy; and then, under the conditions of heating, temperature keeping and the N2 atmosphere, laser texturing is conducted on the surface of the titanium alloy, and meanwhile laser gas nitriding treatment is conducted. The laser gas nitriding technology and the laser surface texturing technology are combined, the titanium-nitride-coating-contained textured surface is prepared on the surface of the aluminum alloy, and the titanium-nitride-coating-contained textured surface have both the advantages of high hardness and chemical stability of the titanium nitride coating and the advantage of the small surface friction coefficient of the textured surface. The method is simple, operation is easy and convenient, the prepared surface texture is stable and controllable in dimension and free of macroscopic cracks and other defects, generated titanium nitride crystal particles are fine and uniform in distribution, and the wear resistance and corrosion resistance of the surface of the titanium alloy are greatly improved.

Description

technical field [0001] The invention belongs to the field of surface modification of titanium alloys, in particular to a method for preparing a textured surface of a titanium alloy coating containing titanium nitride by laser. Background technique [0002] Due to its high specific strength, good corrosion resistance, and high heat resistance, titanium alloys are widely used in the manufacture of aero-engine parts, automotive parts and other industrial fields; in addition, their excellent mechanical properties, biocompatibility and relatively low The elastic modulus has also been regarded as the most ideal implant material for bone tissue repair and replacement. Titanium alloy parts are often served in complex working conditions that need to withstand harsh conditions such as high temperature, wear, and corrosion, which puts strict requirements on the wear resistance and corrosion resistance of titanium alloys. Taking biomedical titanium alloy as an example, the poor wear re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18C23C8/24C21D1/09
Inventor 王小健赵雪阳张鹏李卫
Owner JINAN UNIVERSITY
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