Material containing sheet-shaped wolfram carbide grain and preparation method thereof as well as method for using same to prepare alloy

A technology of tungsten carbide particles and tungsten carbide, which is applied in the field of cemented carbide, can solve problems such as decreased wear resistance, reduced fracture resistance, and impact on the performance of cemented carbide products, and achieves the effect of improving quality, good hardness and toughness

Active Publication Date: 2013-03-13
ZHUZHOU HARD ALLOY GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there is a contradictory problem: if the wear resistance is improved, the fracture resistance will be reduced, on the contrary, if the fracture resistance is improved, the wear resistance will decrease
These free carbons will not only affect the pressing performance of raw materials, but also increase the porosity in the prepared cemented carbide products, thus affecting the performance of cemented carbide products

Method used

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  • Material containing sheet-shaped wolfram carbide grain and preparation method thereof as well as method for using same to prepare alloy
  • Material containing sheet-shaped wolfram carbide grain and preparation method thereof as well as method for using same to prepare alloy
  • Material containing sheet-shaped wolfram carbide grain and preparation method thereof as well as method for using same to prepare alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Firstly, 500g of tungsten powder with Fsss particle size of 3.0μm is selected and flattened. The method of flattening is as follows: 500g of tungsten powder and 1500g of cemented carbide rods are put together into a stainless steel cylinder, wherein the cemented carbide rods are used as grinding bodies. Then, add 1500ml of absolute alcohol to the cylinder as a grinding medium. After the cylinder is sealed, put it into a roller mill for 90 hours to get tungsten powder composed of flaky tungsten particles. Then, the tungsten powder after the flattening process and 34g of cobalt powder as the binder phase material and 33g of graphite as the carbon source material are carried out by rolling ball milling and uniformly mixed to obtain the weight of the tungsten powder: the weight of the binder phase material: the weight of the carbon source material Raw material powder with a weight equal to 88.2:6:5.8. Finally, the raw material powder was carbonized at a temperature of 115...

Embodiment 2

[0047] Firstly, 500g of tungsten powder with Fsss particle size of 3.0μm is selected and flattened. The flattening method is the same as that in Embodiment 1, and will not be repeated here. Then, the weight of the tungsten powder obtained by uniformly mixing the tungsten powder after the flattening process with 43g cobalt powder as the binder phase material and 33g graphite as the carbon source material: the weight of the binder phase material: the weight of the carbon source material is equal to 86.8: Raw material powder of 7.5:5.7. Finally, the raw material powder was carbonized at a temperature of 1150° C. under a hydrogen atmosphere to obtain a material 2 containing flaky tungsten carbide.

[0048] Carry out XRD analysis to material 2, such as figure 2 Shown, where tungsten exists only in the form of tungsten carbide. According to the method of Example 1, the weight content of cobalt in material 2 is 7.5%, and the weight content of tungsten carbide is 92.5%. In additi...

Embodiment 3

[0052] Firstly, 500g of tungsten powder with Fsss particle size of 3.0μm is selected and flattened. The flattening method is the same as that in Embodiment 1, and will not be repeated here. Then, the weight of the tungsten powder obtained by uniformly mixing the tungsten powder after the flattening process with 59g cobalt powder as the binder phase material and 33g graphite as the carbon source material: the weight of the binder phase material: the weight of the carbon source material is equal to 84.5: 10:5.5 raw material powder. Finally, the raw material powder is carbonized at a temperature of 1150° C. under a hydrogen atmosphere to obtain a material 3 containing flaky tungsten carbide.

[0053] Carry out XRD analysis to material 3, such as image 3 Shown, where tungsten exists only in the form of tungsten carbide. According to the method of Example 1, the weight content of cobalt in material 3 is 10%, and the weight content of tungsten carbide is 89.8%. Also analyzed ac...

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Abstract

The invention relates to a material containing a sheet-shaped wolfram carbide grain. The weight content of sheet-shaped wolfram carbide is 70-97% and the weight ratio of compound carbon to a wolfram element in the material is in a range of 6: 94 to 6: 90; the weight content of a bonding phase material is 3-30%; and the balance is inevitable impurities. When a copper target Ka ray is used for carrying out X ray diffraction analysis and peak strengths of a crystal surface (001) and a crystal surface (101) of the sheet-shaped wolfram carbide respectively represent hWC (001) and hWC (101), the sheet-shaped wolfram carbide meets the requirement that the hWC (001)/hWC (101) is more than or equal to 0.65. The invention further relates to the material containing the sheet-shaped wolfram carbide grain and an application of the material containing the sheet-shaped wolfram carbide grain.

Description

technical field [0001] The invention relates to a cemented carbide, in particular to a material containing flaky tungsten carbide (WC) particles and a preparation method thereof. The invention also relates to methods for preparing alloys using the material. Background technique [0002] Cemented carbide has high elastic modulus, high hardness, excellent thermal stability, high temperature oxidation resistance and corrosion resistance, and is widely used in machining, mining and other industries. Generally, the hardness (that is, wear resistance) and the strength and toughness (that is, fracture resistance) of cemented carbide can be changed by changing the particle size of tungsten carbide (WC), the content of cobalt (Co) and the addition of other carbides in cemented carbide. performance), so that cemented carbide is widely used in various occasions. But there is a contradictory problem: if the wear resistance is improved, the fracture resistance will be reduced, and on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05B22F1/00
Inventor 吴志坚尹超金鹏袁红梅张忠健徐涛邓涛
Owner ZHUZHOU HARD ALLOY GRP CO LTD
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