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Ceramic composite material for titanium alloy surface laser cladding

A ceramic composite material, laser cladding technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of insufficient bonding strength, difficult cost input, low mutual fusion, etc., to achieve high hardness and reduce residual stress. , the effect of good toughness

Active Publication Date: 2017-06-13
山西维科机械设备工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the cladding layer and the substrate can also be metallurgically bonded, the bonding strength is not good enough due to the low mutual melting between the cladding layer and the substrate.
Moreover, less consideration is given to preparing the cladding layer through the in-situ reaction between the substrate and the powder, which is not easy to further reduce the cost input in industrial applications

Method used

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  • Ceramic composite material for titanium alloy surface laser cladding
  • Ceramic composite material for titanium alloy surface laser cladding
  • Ceramic composite material for titanium alloy surface laser cladding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The raw materials used to prepare ceramic composite materials include Ti powder with a particle size of 100 mesh, TIBCN ceramic powder with a particle size of 150 mesh and B 4 C powder. Among them, TiBCN ceramic powder and B 4 C powder is dried before preparation to prevent the formation of pores in the cladding coating and bring defects to the cladding coating.

[0041] Weigh 220g of Ti powder, 750g of TiBCN ceramic powder, B 4 Add 30 g of C powder into a ball mill and mix for 2 hours to obtain a ceramic composite material for laser cladding on the titanium alloy surface.

[0042] Using the ceramic composite material for laser cladding of the titanium alloy surface prepared above, laser cladding is performed on the surface of the titanium alloy sample that has been subjected to surface treatment. Specific laser cladding process parameters include: laser power 1500W, spot diameter 1.5mm, scanning speed 3mm / s, carrier pressure of ceramic composite material 0.6Mp, powd...

Embodiment 2

[0060] Weigh 450g of Ti powder with a particle size of 300 mesh, 490g of TiBCN ceramic powder with a particle size of 300 mesh, and B with a particle size of 500 mesh. 4 60g of powder C was prepared according to the method in Example 1 to obtain a ceramic composite material for laser cladding on the surface of a titanium alloy.

[0061] The laser cladding process parameters are: laser power 1000W, spot diameter 2mm, scanning speed 5mm / s, others are the same as in Example 1, and a TiBCN hard composite coating is formed on the surface of the titanium alloy according to the method in Example 1.

[0062] Test the performance of the cladding coating according to the test method of Example 1, and the cladding coating hardness is 1147~1245Hv 0.2 , the coating wear rate is 1.53mg / min, and the friction coefficient of the wear test is 0.4.

Embodiment 3

[0068] Weigh 650g of Ti powder with particle size of 150 mesh, 250g of TiBCN ceramic powder of 200 mesh, and B 4 100g of C powder was prepared according to the method in Example 1 to obtain a ceramic composite material for laser cladding on the titanium alloy surface.

[0069] The laser cladding process parameters are: laser power 1400W, spot diameter 3mm, scanning speed 5mm / s, others are the same as in Example 1, and a TiBCN hard composite coating is formed on the titanium alloy surface according to the method in Example 1.

[0070] Test the performance of the cladding coating according to the test method of Example 1, and the cladding coating hardness is 986~1076Hv 0.2 , the coating wear rate is 1.71mg / min, and the friction coefficient of the wear test is 0.3.

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Abstract

The invention relates to a ceramic composite material for titanium alloy surface laser cladding. The ceramic composite material is prepared by mixing 20-65wt% of Ti powder, 25-75wt% of TiBCN ceramic powder and 2-10wt% of B4C powder. The ceramic composite material has the advantages that composite ceramic cladding coating metallurgically bonding with a titanium alloy matrix is formed on the surface of titanium alloy through the laser cladding technology, coating hardness can reach 3.5-4.5 times of that of the titanium alloy matrix, coating wear resistance is increased evidently, and a sample wear rate is only 1 / 3-1 / 4 of that of the titanium alloy matrix and is lowered evidently as compared with that of the matrix; multiple laser cladding operation can be repeatedly performed on the surface of the titanium alloy so as to regulate cladding coating thicknesses according to needs.

Description

technical field [0001] The invention belongs to the technical field of material surface strengthening, and relates to a ceramic composite material, in particular to a ceramic composite material used for laser cladding strengthening of the titanium alloy surface. [0002] technical background [0003] Titanium alloy has low density, high specific strength, good corrosion resistance and fatigue resistance, and is widely used in aerospace, national defense, automobile, medical and other fields. However, titanium alloy has a high coefficient of friction and is very sensitive to adhesive wear and fretting wear. The disadvantages of hardness, wear resistance and high temperature oxidation resistance restrict its wider application. [0004] Laser cladding technology refers to placing the selected coating material on the surface of the cladding substrate in different ways of adding materials, melting it and the thin layer of the substrate surface at the same time through laser irrad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C14/00C22C32/00C22C29/00
CPCC22C14/00C22C29/005C22C32/0047C22C32/0089C23C24/103
Inventor 李玉新吴利芸白培康刘斌张鹏飞
Owner 山西维科机械设备工程有限公司
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