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Method for preparing nb-based multi-element powder fusion alloy coating on titanium metal surface

A technology of element powder and alloy coating, which is applied in the field of surface modification of titanium metal and the preparation of Nb-based multi-element powder fusion alloy coating on the surface of titanium metal, which can solve the problems of low hardness and poor wear resistance, and achieve small changes in hardness , High corrosion resistance, high coating hardness

Active Publication Date: 2016-08-17
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low surface hardness and poor wear resistance of ordinary titanium metal, and invent a method for preparing Nb-based multi-element powder fusion alloy coating on the surface of titanium metal. The cladding layer obtained by it has interface bonding It has the advantages of good performance, uniform distribution of elements, high hardness, high wear resistance and corrosion resistance, and has the advantages of simple operation, easy realization, and excellent economy

Method used

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  • Method for preparing nb-based multi-element powder fusion alloy coating on titanium metal surface
  • Method for preparing nb-based multi-element powder fusion alloy coating on titanium metal surface
  • Method for preparing nb-based multi-element powder fusion alloy coating on titanium metal surface

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Embodiment 1

[0024] Such as Figure 1-3 shown.

[0025] Put 62.2 grams of Nb powder, 26.5 grams of Sn powder, 10 grams of Zr powder, and 1.3 grams of Ti powder in a ball mill, mix them evenly, take them out and dry them, and press them into tablets (thickness is about 0.5 mm) on a press. Place the pressed tablet on the cleaned titanium surface, using NEL-2400T cross-flow CO 2 The laser is used for laser cladding, and the process parameters are: laser power 1.9KW, scanning speed 200mm / min, spot diameter 2mm.

[0026] The coating structure obtained in this embodiment is dense and the interface is tightly bonded ( figure 1 ), the coating and the substrate have obvious and gradient element diffusion ( figure 2 ). The hardness of the coating along the cross-section changes little, and the average hardness HV850 is 142% higher than that of the substrate HV350 ( image 3 ).

Embodiment 2

[0028] This embodiment is similar to the embodiment, except that the laser used is a YLS-6000 fiber laser, and the laser process parameters are: laser power 1.9 KW, scanning speed 300 mm / min, spot diameter 2 mm.

[0029] The coating structure obtained in this embodiment is uniform and dense, without obvious cracks and holes ( Figure 4 ).

Embodiment 3

[0031] This embodiment is similar to the embodiment, except that the laser used is a YLS-6000 fiber laser, and the laser process parameters are: laser power 1.8KW, scanning speed 300 mm / min, spot diameter 2mm.

[0032] The coating structure obtained in this embodiment is uniform and dense, without obvious cracks and holes ( Figure 5 ).

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Abstract

The invention relates to a method for preparing a Nb-base multielement powder fusion alloy coating on a titanium metal surface, which comprises the following steps: prefabrication of mixture powder compacted sheet composed of Nb powder, Sn powder, Zr powder and Ti powder: uniformly mixing 62.2 wt% of Nb powder, 26.5 wt% of Sn powder, 10 wt% of Zr powder and 1.3 wt% of Ti powder in a ball mill, drying, and finally, compacting by a pressing machine to obtain the sheet; and laser cladding treatment: putting the compacted sheet on a cleaned titanium metal surface, and carrying out laser cladding. The cladding technique has favorable properties; the coating has the advantages of compact structure and favorable interfacial combination; the hardness variation of the coating along the cross section is small; and the average hardness HV850 is enhanced by 142% as compared with the matrix hardness HV350. The coating has higher corrosion resistance than the titanium metal matrix, and the component elements have favorable biological phases and biological properties, so the method has wide application range.

Description

Technical field [0001] The invention relates to a metal material surface modification technology, in particular to a titanium metal surface modification technology, in particular to a method for preparing an Nb-based multi-element powder fusion alloy coating on the titanium metal surface. Background technique [0002] Titanium metal has the advantages of low density, high strength, corrosion resistance and good biocompatibility, and has been widely used in the field of biomedicine. However, its hardness is low and its wear resistance is poor, which seriously affects its performance and service life. [0003] Nb-based coating alloys have the advantages of high hardness, corrosion resistance, and good biocompatibility, and have great application potential as biological implant materials. The Nb-based multi-element powder contains Sn element with a low melting point as an activator to promote mutual melting between elements. [0004] Laser surface cladding technology is to he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B22F1/00C22C27/02
Inventor 许晓静陈婷卓何星华吴桂兰朱刘华王宏宇
Owner JIANGSU UNIV