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Preparation method of wear-resistant metal-multi-element ceramic composite modified coating on surface of titanium alloy

A wear-resistant metal and ceramic composite technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of coating hardness cracks, material waste, deviation, etc., to improve wear resistance, good toughness, fine grain obvious effect

Active Publication Date: 2021-11-19
YANSHAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In recent years, research on wear-resistant coatings on the surface of laser cladding titanium alloys has been widely carried out, but there are still many problems to be solved urgently, such as the balance between the hardness and toughness of the coating, the problem that cracks are easy to occur when the hardness of the coating is too high, etc.
In addition, because laser processing is different from traditional processing such as casting, it is open processing. At the moment of laser irradiation, the metal-ceramic elements added to the powder material are melting and decomposing, and even evaporation or ablation occurs, which is very complicated. The physical and chemical changes caused by the waste of materials also deviate from the original intention of the design

Method used

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  • Preparation method of wear-resistant metal-multi-element ceramic composite modified coating on surface of titanium alloy
  • Preparation method of wear-resistant metal-multi-element ceramic composite modified coating on surface of titanium alloy
  • Preparation method of wear-resistant metal-multi-element ceramic composite modified coating on surface of titanium alloy

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preparation example Construction

[0030] A method for preparing a wear-resistant metal-multielement ceramic composite modified coating on the surface of a titanium alloy, comprising the following steps:

[0031] (1) Preparation of pre-alloyed powder, specifically including the following steps:

[0032] S1. Take four powders of HfC, TaC, ZrC and NbC with a particle size of 100-270 mesh, and mix them in a ratio of 1:1:1:1 by mass;

[0033] S2, put the mixed powder of S1 into a high-energy ball mill, and perform ball milling to obtain a ground ceramic phase powder;

[0034] S3. Take the spherical titanium alloy powder with a particle size of 400-500 mesh, put the titanium alloy powder and the ceramic phase powder obtained by grinding in S2 into a ball mill for ball milling to obtain a ground pre-alloyed powder, and the ceramic phase powder in the pre-alloyed powder The mass percentage is 5% to 15%.

[0035] Wherein, the grinding balls used in the S2 and S3 ball milling are corundum balls with a diameter of 1mm ...

Embodiment 1

[0040] A method for preparing a wear-resistant metal-multielement ceramic composite modified coating on the surface of a titanium alloy, comprising the following steps:

[0041] (1) Preparation of pre-alloyed powder, including the following steps:

[0042] S1. The particle size is HfC, TaC, ZrC and NbC four kinds of powders with a particle size of 100-270 mesh, mixed in a ratio of 1:1:1:1 by mass;

[0043] S2. Put the mixed powder into a high-energy ball mill for ball milling. During ball milling, the grinding balls are mixed corundum balls with a diameter of 1mm and 3mm and a quantity ratio of 1:4. The volume ratio of the ball to material is about 3:1. The ball milling time For 12 hours, the ground ceramic phase powder was obtained;

[0044] S3. Take the spherical TC4 powder with a particle size of 400 to 500 meshes, grind the TC4 powder and the ceramic phase powder obtained by S2, and put them into a ball mill for ball milling, wherein the ceramic phase powder accounts for ...

Embodiment 2

[0049]A method for preparing a wear-resistant metal-multielement ceramic composite modified coating on the surface of a titanium alloy, comprising the following steps:

[0050] (1) Preparation of pre-alloyed powder, including the following steps:

[0051] S1. Take four powders of HfC, TaC, ZrC and NbC with a particle size of 100-270 mesh, and mix them in a ratio of 1:1:1:1 by mass;

[0052] S2. Put the mixed powder into a high-energy ball mill for ball milling. During ball milling, the grinding balls are mixed corundum balls with a diameter of 1mm and 3mm and a quantity ratio of 1:4. The volume ratio of the ball to material is about 3:1. The ball milling time For 10 hours, the ground ceramic phase powder was obtained;

[0053] S3. Take the spherical TC4 powder with a particle size of 400-500 meshes, grind the TC4 powder and the ceramic phase powder obtained by S2, and put them into a ball mill for ball milling, wherein the ceramic phase powder accounts for 10% of the total ma...

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Abstract

The invention relates to a preparation method of a wear-resistant metal-multi-element ceramic composite modified coating on the surface of a titanium alloy, and belongs to the technical field of surface engineering. The preparation method of the wear-resistant metal-multi-element ceramic composite modified coating on the surface of the titanium alloy comprises the following steps: (1) preparing pre-alloyed powder for later use; (2) cleaning the to-be-clad surface of a base material by adopting industrial alcohol, and then carrying out blackening treatment on the surface of the base material; and (3) coaxially conveying the pre-alloyed powder prepared in the step (1) to the to-be-clad surface of a base material, which is treated in the step (2), carrying out laser cladding, and preparing to obtain the wear-resistant metal-multi-element ceramic composite modified coating on the surface of the titanium alloy. The composite modified coating prepared through the preparation method is obvious in grain refinement, the purpose of grain refinement strengthening is achieved, the coating is guaranteed to have high hardness and high toughness at the same time, and therefore the wear resistance of the titanium alloy can be greatly improved, and then the service life of the titanium alloy under a complex working condition is prolonged.

Description

technical field [0001] The invention relates to a preparation method of a wear-resistant metal-multielement ceramic composite modified coating on the surface of a titanium alloy, belonging to the technical field of surface engineering. Background technique [0002] Titanium alloys are widely used in aerospace, petrochemical and other engineering fields due to their high specific strength, high yield ratio, and good corrosion resistance. However, due to the inherent shortcomings of titanium alloys such as high friction coefficient, poor wear resistance, and low high-temperature oxidation resistance, it will seriously affect the service life of its service parts and limit its wider application in the aerospace industry. Studies have shown that surface modification technologies such as laser cladding are effective means to improve the surface properties of titanium alloys. [0003] Laser cladding technology is an emerging technology that uses high-energy lasers and metal powde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C14/00C22C32/00B22F9/04
CPCC23C24/103B22F9/04C22C32/0052C22C14/00B22F2009/043B22F2009/041
Inventor 郑立娟闫茂荣田宁刘绍峰张阔付宇明
Owner YANSHAN UNIV
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