TiC-reinforced cobalt-based metal ceramic composite coating on titanium alloy surface and preparation process thereof

A technology of ceramic compounding and preparation technology, which is applied in the direction of metal material coating technology and coating, and can solve the problem of less cobalt-based alloys

Active Publication Date: 2014-03-05
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are few reports on laser cladding of cobalt-based alloys on the surface of titanium alloys

Method used

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  • TiC-reinforced cobalt-based metal ceramic composite coating on titanium alloy surface and preparation process thereof
  • TiC-reinforced cobalt-based metal ceramic composite coating on titanium alloy surface and preparation process thereof
  • TiC-reinforced cobalt-based metal ceramic composite coating on titanium alloy surface and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A TiC-enhanced cobalt-based cermet composite coating on the surface of a titanium alloy is prepared by using a mixture of cobalt-based alloy and TiC as a cladding material and using laser cladding technology. The specific steps are as follows:

[0040] (1) Clean the surface of the titanium alloy sample, clean it after wire electric discharge cutting, and dry it for later use;

[0041] (2) Weigh the cladding material powder according to a certain mass ratio, and mix the powder evenly;

[0042] (3) Adjust the mixed powder of the cladding material into a paste with a binder, and then evenly coat the surface of the titanium alloy substrate, the thickness is controlled at 0.7mm, and the thickness is kept uniform, and it is naturally air-dried;

[0043] (4) Laser cladding is carried out on the above-mentioned dried samples, the laser power is selected as 900W, the laser scanning speed is 2.5mm / s, the argon gas is blown for protection, the protection pressure is 0.2MPa, and th...

Embodiment 2

[0046] A TiC-enhanced cobalt-based cermet composite coating on the surface of a titanium alloy is prepared by using a mixture of cobalt-based alloy and TiC as a cladding material and using laser cladding technology. The specific steps are as follows:

[0047] (1) Clean the surface of the titanium alloy sample, clean it after wire electric discharge cutting, and dry it for later use;

[0048] (2) Weigh the cladding material powder according to a certain mass ratio, and mix the powder evenly;

[0049] (3) Adjust the mixed powder of the cladding material into a paste with a binder, and then evenly coat the surface of the titanium alloy substrate, the thickness is controlled at 0.7mm, and the thickness is kept uniform, and it is naturally air-dried;

[0050] (4) Laser cladding is carried out on the above-mentioned dried samples, the laser power is selected as 850W, the scanning speed of the laser is 2.5mm / s, the argon gas is blown for protection, the protection pressure is 0.2MPa,...

Embodiment 3

[0055] A TiC-enhanced cobalt-based cermet composite coating on the surface of a titanium alloy is prepared by using a mixture of cobalt-based alloy and TiC as a cladding material and using laser cladding technology. The specific steps are as follows:

[0056] (1) Clean the surface of the titanium alloy sample, clean it after wire electric discharge cutting, and dry it for later use;

[0057] (2) Weigh the cladding material powder according to a certain mass ratio, and mix the powder evenly;

[0058] (3) Adjust the mixed powder of the cladding material into a paste with a binder, and then evenly coat the surface of the titanium alloy substrate, the thickness is controlled at 0.7mm, and the thickness is kept uniform, and it is naturally air-dried;

[0059] (4) Laser cladding is carried out on the above-mentioned dried samples, the laser power is selected as 1000W, the scanning speed of the laser is 5mm / s, the argon gas is blown for protection, the protection pressure is 0.3MPa, ...

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Abstract

The invention relates to a TiC-reinforced cobalt-based metal ceramic composite coating on a titanium alloy surface and a preparation process thereof. The preparation process comprises the following steps of uniformly mixing a cobalt-based alloy and a ceramic hard-phase TiC, and mixing into a paste form with a binder; uniformly applying the paste to the surface of the titanium alloy matrix, and drying in the air; performing laser cladding on the sample dried in the air, wherein the laser power is 800-1,200W, and the scanning speed of the laser is 2.5-7.5mm / s; blowing argon for protection, wherein the protection gas pressure is 0.2-0.4MPa, and the diameter of the light spot of the laser is fixed at 4mm. In the preparation process provided by the invention, the titanium alloy surface is subjected to laser cladding by adopting the composite system of the cobalt-based alloy and TiC as a cladding material, and the characteristics of corrosion resistance and good wettability of the cobalt-based alloy can be combined with the characteristics of high stability, high hardness, high wear resistance and the like of TiC, thereby being favorable for preparing a cladding layer with good toughness matching on the titanium alloy surface.

Description

technical field [0001] The invention relates to a metal-ceramic composite coating, in particular to a laser cladding two-type cobalt-based metal-ceramic composite coating on the surface of a titanium alloy and a preparation process thereof, belonging to the field of surface modification of metal materials. Background technique [0002] Titanium alloy is a new type of structural material developed in the late 1940s. Its main characteristics are low density, high specific strength, good performance at medium and low temperatures, and corrosion resistance. Therefore, it is widely used in aviation, chemical industry, medical treatment and other fields. However, titanium alloys have low hardness, poor wear resistance and high temperature oxidation resistance, and these unfavorable factors greatly limit their application range. [0003] As a non-contact, non-polluting, efficient and flexible advanced surface modification technology, laser surface modification technology has been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C29/10C22C19/07
Inventor 于慧君陈传忠翁飞
Owner SHANDONG UNIV
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