Non-binding-phase carboloy metal and preparation method thereof

A cemented carbide, non-bonded technology, applied in the field of powder metallurgy, can solve the problem of not being able to prepare a water jet sand mixing pipe and the like, and achieve the effects of high wear resistance, low cost and simple preparation process

Active Publication Date: 2014-07-16
西安奥奈特固体润滑工程学研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem that the existing cemented carbide and its preparation process cannot prepare a water jet sand mixing pipe that meets the material performance requirements, and to provide a binder-free tungsten carbide cemented carbide and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In order to overcome the fact that the existing cemented carbide cannot meet the requirements of high density, high hardness and high wear resistance of the water jet sand mixing pipe, the present invention provides a binder-free tungsten carbide cemented carbide, each component and mass percentage The content is as follows: 0.10%~0.30% vanadium carbide, 0.10%~0.30% tantalum carbide, 0.10%~0.25% cobalt, and the balance is tungsten carbide.

[0021] Among them, tungsten carbide, vanadium carbide, tantalum carbide, and cobalt are all in powder form, and the particle size of tungsten carbide powder is 100 nm to 300 nm, and the purity is not less than 99.8%; the particle size of vanadium carbide and tantalum carbide is not larger than that of tungsten carbide, and the particle size of cobalt The powder particle size is not greater than 2 microns, and the purity is not less than 99%; and the sum of the mass percentages of vanadium carbide powder, tantalum carbide powder and c...

Embodiment 2

[0030] On the basis of Example 1, a specific preparation process of tungsten carbide cemented carbide without binder phase is provided.

[0031] 1) Mix 0.15% vanadium carbide, 0.1% tantalum carbide, 0.15% metal cobalt and 99.6% tungsten carbide in a nitrogen-protected three-dimensional mixing tank for 6 hours, wherein the particle size of tungsten carbide, vanadium carbide and tantalum carbide The particle size of the metal cobalt is 300 nanometers, and the particle size of the metal cobalt is 1 micron; the purity of the carbide in the above raw materials is 99.8%, and the purity of the metal cobalt is 99.5%.

[0032] 2) Put the mixed raw materials into a graphite mold and place it in a plasma activated sintering furnace. The shape of the graphite inner cavity is rectangular, the size is 22mm×81mm (with rounded corners R5mm), and the compressive strength of the graphite material is 125MPa. The paper thickness is 0.30mm.

[0033] 3) The plasma activation sintering process is: ...

Embodiment 3

[0036] On the basis of Example 1, a specific preparation process of tungsten carbide cemented carbide without binder phase is provided.

[0037] 1) Mix 0.1% vanadium carbide, 0.2% tantalum carbide, 0.10% metallic cobalt and 99.6% tungsten carbide in a nitrogen-protected three-dimensional mixing tank for 9 hours in a proportion of mass percentage, wherein the particle size of tungsten carbide, vanadium carbide and tantalum carbide The particle size is 200 nanometers, and the particle size of metal cobalt is 1 micron; the purity of carbides in the above raw materials is 99.8%, and the purity of metal cobalt is 99.5%.

[0038] 2) Put the mixed raw materials into the graphite mold and place it in the plasma activation sintering furnace. The paper thickness is 0.30mm.

[0039]3) The plasma activation sintering process is as follows: heating rate 90°C / min, sintering pressure 30MPa, sintering temperature 1720°C, holding time 8 minutes, cooling with the furnace.

[0040] The non-bin...

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Abstract

The invention belongs to the technical field of powder metallurgy, and particularly relates to a non-binding-phase carboloy metal and a preparation method thereof. The non-binding-phase carboloy metal comprises the following components in percentage by mass: 0.10-0.30% of vanadium carbide, 0.10-0.30% of tantalum carbide, 0.10-0.25% of cobalt, and the balance of tungsten carbide. According to the invention, a carboloy metal with high density, high hardness and high wear resistance is obtained by using a plasma activated sintering process, then a large-sized bulk material is obtained by using a special mould shape, and the process is simple, and low in cost, can be used for realizing mass production, and meets the requirements of hydro-jet sand mixing tubes on high-wear-resisting materials.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a tungsten carbide cemented carbide without a binder phase and a preparation method thereof, which can be used for manufacturing water jet sand mixing pipes. Background technique [0002] The abrasive waterjet in the cutting industry is an abrasive waterjet system that can cut, mill, drill, and grind any engineering material, but when working, it is washed away by the abrasive, high-pressure water, and air jets at the same time. The high-pressure water carries pomegranate sand or even corundum sand, and is ejected from the sand mixing pipe at a speed of Mach 3, which causes serious wear of the sand mixing pipe. The high cost of the sand mixing pipe limits the faster and large-scale industrial application of the sand adding water jet. The waterjet sand mixing tube is the most critical part of water cutting. To achieve a good cutting effect, the high-speed wa...

Claims

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Application Information

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IPC IPC(8): C22C29/08C22C1/05
Inventor 张军
Owner 西安奥奈特固体润滑工程学研究有限公司
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