Method for infiltrating tungsten carbide on the surface of carbon material

A technology of carbon material and tungsten carbide, which is applied in the field of tungsten carbide to achieve the effects of alleviating thermal mismatch, simple process and improving adhesion

Inactive Publication Date: 2011-04-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method has some disadvantages

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The carbon-based tungsten coating prepared by PVD method is put into a heat treatment furnace for high temperature heat treatment. The heat treatment process is as follows: first raise the temperature to 1050°C, keep it warm for 2.5 hours, then continue to raise the temperature to 1300°C and keep it warm for 1.5 hours, then cool with the furnace. Repeat the above deposition and heat treatment process 3 times, 50 μm deep tungsten carbide is infiltrated on the surface of the carbon material, and the tungsten carbide content reaches 5%.

Embodiment 2

[0015] Put the carbon-based tungsten coating prepared by CVD into a heat treatment furnace for high temperature heat treatment. The heat treatment process is as follows: first raise the temperature to 1100°C, keep it warm for 2 hours, then continue to raise the temperature to 1350°C and keep it warm for 1 hour, then cool with the furnace. Repeat the above deposition and heat treatment process for 4 times, 100 μm deep tungsten carbide is infiltrated on the surface of the carbon material, and the tungsten carbide content reaches 12%.

Embodiment 3

[0017] Put the carbon-based tungsten coating prepared by the DGP method into a heat treatment furnace for high temperature heat treatment. The heat treatment process is as follows: first raise the temperature to 1150°C, keep it warm for 1.5 hours, then continue to raise the temperature to 1400°C and keep it warm for 0.5 hour, then cool with the furnace. Repeat the above deposition and heat treatment process for 5 times, 300 μm deep tungsten carbide is infiltrated on the surface of the carbon material, and the tungsten carbide content reaches 19%.

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PUM

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Abstract

The invention provides a method for infiltrating tungsten carbide on the surface of carbon material, which is characterized in that high temperature heat treatment is conducted to the carbon material on which a thinner tungsten coating layer is deposited; and the heat treatment process comprises the following steps: firstly carrying out heat preservation for a period of time at the lower temperature and then carrying out heat preservation for a period of time at the higher temperature again. After the completion of heat treatment, a thinner tungsten coating layer is deposited on the surface of the material again, and then the heat treatment in the identical process is conducted to the material again. The processes are performed for 3 to 5 times, namely the tungsten carbide can be infiltrated on the surface of the carbon material. The preparation of the tungsten carbide on the surface can preferably select the methods such as chemical gas phase deposition, physical gas phase depositionand after-glow plasma. The tungsten carbide is infiltrated on the surface of the carbon material by adopting the high temperature heat treatment method; a tungsten element is transited from the surface of the carbon material in a tapered manner from inside to outside, so that the thermal mismatching of the tungsten carbide and the carbon material is effectively relieved, and a coating layer and abase body are combined stably.

Description

technical field [0001] The invention relates to a method for carburizing tungsten carbide, in particular to a method for carburizing tungsten carbide on the surface of a carbon material. Background technique [0002] Tungsten carbide has special corrosion resistance, high hardness and compressive strength, known as modern industrial teeth, and occupies an extremely important position in machinery, metallurgy, precision instruments, military and other industries. The cost of directly processing tungsten carbide cemented carbide into parts (that is, the forming of tungsten carbide) is very high, and at some point, people only require the surface of the part to have high hardness, wear resistance and corrosion resistance, and the matrix of the part still needs tough material At this time, the application of tungsten carbide forming is not only unnecessary, but also cannot meet the requirements of use. Therefore, it is found that a layer of tungsten carbide coating can be prepa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/50
Inventor 陈照峰承涵万水成吴王平
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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