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A kind of tungsten carbide cemented carbide without binder phase and its preparation method

A cemented carbide, non-adhesive technology, applied in the field of cemented carbide, can solve problems such as complex process, and achieve the effect of simple process, convenient operation and good alloy performance

Active Publication Date: 2016-06-01
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method also has the problem of complex process and requires the use of special equipment.

Method used

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  • A kind of tungsten carbide cemented carbide without binder phase and its preparation method
  • A kind of tungsten carbide cemented carbide without binder phase and its preparation method
  • A kind of tungsten carbide cemented carbide without binder phase and its preparation method

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preparation example Construction

[0028] The invention provides a method for preparing tungsten carbide cemented carbide without a binder phase, comprising the following steps:

[0029] A) Under protective gas or vacuum atmosphere, mix tungsten and carbon and perform high-energy ball milling to obtain a mixture;

[0030] B) Under protective gas or vacuum atmosphere, sinter the mixture obtained in the above step A) to obtain tungsten carbide cemented carbide without binder phase.

[0031] All the raw materials in the present invention have no particular limitation on their sources, and they can be obtained by conventional preparation methods or purchased on the market.

[0032] The invention firstly mixes tungsten and carbon under protective gas or vacuum atmosphere, and then carries out high-energy ball milling to obtain the mixture.

[0033] The particle size of described mixture is preferably 8~50nm, more preferably 10~30nm; The theoretical molar ratio of tungsten and carbon in the process of preparing tung...

Embodiment 1

[0050] First, mix tungsten powder with a particle size of 0.5 μm and a purity of 99.5% and carbon powder with a particle size of 0.5 μm and a purity of 99.5% at a molar ratio of 1:1.01, and control the total mass to 30 grams.

[0051] Then, under the protection of argon atmosphere, put the above-mentioned mixed powder into a ball mill jar, and then put it into a high-energy ball mill (GN-2 high-energy ball mill, Shenyang Kete Vacuum Electromechanical Equipment Factory), and the frequency of the ball mill is 900 rpm. Carry out ball milling under the condition of / minute, after ball milling 6 hours, obtain the mixture that particle size is 50nm.

[0052] Under the protection of an argon atmosphere, the mixture obtained in the above steps was subjected to cold pressing under a pressure of 200 MPa to obtain a mixture green body. Put the above mixture green body into a graphite mold, and carry out reaction sintering in a sintering furnace (TL2000, Suzhou Tenglong Machinery Manufactu...

Embodiment 2

[0057] First, mix tungsten powder with a particle size of 1 μm and a purity of 99.5% and carbon powder with a particle size of 3 μm and a purity of 99.5% at a molar ratio of 1:1.01, and control the total mass to 30 grams.

[0058] Then, under the protection of argon atmosphere, put the above-mentioned mixed powder into a ball mill jar, and then put it into a high-energy ball mill (GN-2 high-energy ball mill, Shenyang Kete Vacuum Electromechanical Equipment Factory), and the frequency of the ball mill is 900 rpm. Carry out ball milling under the condition of / minute, after ball milling 6 hours, obtain the mixture that particle size is 50nm.

[0059] Under the protection of an argon atmosphere, the mixture obtained in the above steps was subjected to cold pressing under a pressure of 200 MPa to obtain a mixture green body. Put the above mixture body into a graphite mold, and carry out reaction sintering in a sintering furnace (TL2000, Suzhou Tenglong Machinery Manufacturing Co., ...

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Abstract

The invention provides a binding-phase-free tungsten carbide hard alloy and a preparation method thereof. The preparation method comprises the following steps: mixing tungsten and carbon under a protective gas or vacuum atmosphere for high energy ball milling to obtain a mixture; and under the protective gas or vacuum atmosphere, sintering the mixture obtained in the above step to obtain the binding-phase-free tungsten carbide hard alloy. The method of preparing the binding-phase-free tungsten carbide hard alloy is simple in process and convenient to operate, and no extra binders are added, and the alloy has a good alloy performance.

Description

technical field [0001] The invention belongs to the technical field of cemented carbide, and in particular relates to a tungsten carbide cemented carbide without a binder phase and a preparation method thereof. Background technique [0002] With the development of the world economy and the continuous innovation of industrial technology, the requirements for machining in various fields are increasing day by day. As one of the main materials of machining tools, cemented carbide has been widely concerned about research topics and improvement projects related to it. [0003] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy. Cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance, which basically remain unchanged even at a temperature of 500°C , I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C29/08
Inventor 刘建伟马贤锋汤华国赵伟赵振业
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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