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Multi-scale multi-layered interface cemented carbide material preparation method

A cemented carbide and multi-level technology, applied in the field of preparation of multi-scale and multi-level interface cemented carbide materials, can solve problems such as limited effects and achieve the effect of improving strength and toughness

Active Publication Date: 2019-05-31
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Commonly used methods such as adding grain inhibitors, changing ultrafine raw materials, and powder pretreatment have limited effects

Method used

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  • Multi-scale multi-layered interface cemented carbide material preparation method

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preparation example Construction

[0018] A method for preparing a multi-scale and multi-level interface cemented carbide material of the present invention comprises the following steps:

[0019] 1) The tungsten carbide powder is subjected to high-impulse frequency conversion impact treatment by using a double-axis overturning ball mill. Zirconium whiskers are mixed, the mass percentage of tungsten carbide powder and zirconia whiskers is (99.88-99.95): (0.05-0.12), the mixing equipment is a low-speed mixer, the speed is 30-60 rpm, and the whiskers are wrapped and carbonized Tungsten composite powder;

[0020] 2) Stir and granulate the whisker-wrapped tungsten carbide composite powder with nodulizer. The nodulizer is 30mol / L polyvinyl alcohol aqueous solution, and the mass ratio of powder to glue is (86.6~94.6):(5.4~13.4). After degreasing Mix with cobalt powder, the degreasing temperature is 450°C, and the mass ratio of spheroidized powder to cobalt powder is (87.5-92.4): (7.6-12.5) to obtain mixed powder;

...

Embodiment 1

[0024] 1) The tungsten carbide powder is subjected to high-impulse frequency conversion impact treatment with a double-axis overturning ball mill, the spindle speed is 350 rpm, the turning time interval is 3 minutes, and the turning speed is 40 rpm, and then mixed with zirconia whiskers and carbonized The mass percentage of tungsten powder and zirconia whiskers is 99.88:0.12, and the mixing equipment is a low-speed mixer with a rotation speed of 30 rpm to obtain whisker-wrapped tungsten carbide composite powder;

[0025] 2) Stir and granulate the whisker-wrapped tungsten carbide composite powder with nodulizer. The nodulizer is 30mol / L polyvinyl alcohol aqueous solution, and the mass ratio of powder to glue is 86.6:13.4. After degreasing, it is mixed with cobalt powder. The degreasing temperature is At 450°C, the mass ratio of spheroidized powder to cobalt powder is 87.5:12.4 to obtain mixed powder;

[0026] 3) Put the mixed powder in a hydraulic rapid heating device for firin...

Embodiment 2

[0028] 1) The tungsten carbide powder is subjected to high-impulse frequency conversion impact treatment with a double-axis overturning ball mill. The spindle speed is 360 rpm, the turning time interval is 3 minutes, and the turning speed is 45 rpm. Then, it is mixed with zirconia whiskers and carbonized The mass percentage of tungsten powder and zirconia whiskers is 99.90:0.10, and the mixing equipment is a low-speed mixer with a rotation speed of 40 rpm to obtain whisker-wrapped tungsten carbide composite powder;

[0029] 2) Stir and granulate the whisker-wrapped tungsten carbide composite powder with nodulizer. The nodulizer is 30mol / L polyvinyl alcohol aqueous solution, and the mass ratio of powder to glue is 87:13. After degreasing, it is mixed with cobalt powder. The degreasing temperature is At 450°C, the mass ratio of spheroidized powder to cobalt powder is 88:12 to obtain mixed powder;

[0030] 3) Put the mixed powder in a hydraulic rapid heating device for firing mol...

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Abstract

The invention discloses a multi-scale multi-layered interface cemented carbide material preparation method. Firstly, impact treatment is conducted on tungsten carbide powder, the tungsten carbide powder is mixed with zirconium dioxide whiskers, then a spherical agent is added for stirring granulation, the obtained product is mixed with the cobalt powder after degreasing, finally, the mixed powderis placed in a hydraulic fast-heating device for burning molding to obtain a multi-scale multi-layered interface cemented carbide material finally. The method has high component control precision andhigh process stability and repeatability, and can realize the high toughness and long service life of the cemented carbide material.

Description

technical field [0001] The invention relates to the technical field of cemented carbide preparation, in particular to a preparation method of a multi-scale and multi-level interface cemented carbide material. Background technique [0002] The "inverse ratio" of the strength and toughness of cemented carbide materials has become one of the most important factors limiting its development. Commonly used methods such as adding grain inhibitors, changing ultrafine raw materials, and powder pretreatment have limited effects. Therefore, it is very important to find a new method to balance the strength-toughness contradiction of cemented carbide and improve its processing performance. Contents of the invention [0003] The invention aims at the present situation in the research and development field where it is difficult to effectively coordinate the strength and toughness of cemented carbide by common means, and provides a method for preparing a multi-scale and multi-layered int...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C29/06C22C29/08B22F1/00
Inventor 董洪峰艾桃桃李文虎
Owner SHAANXI SCI TECH UNIV
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