High-temperature solid phase reaction preparation of tungsten-aluminum carbide sosoloid powder

A high-temperature solid-state reaction and tungsten carbide-aluminum technology, which is applied in the field of high-temperature solid-state reaction preparation of tungsten carbide-aluminum solid solution powder, can solve the problems of complex equipment, difficult mass production, and many impurities, and achieve less impurity pollution and good crystallization , The effect of simple process

Inactive Publication Date: 2003-09-03
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can synthesize W at room temperature 1-X Al X C nano powder, but the long-term ball milling process will bring more impurities
Moreover, this method also has the disadvantages of long time consumption (more than 150 hours), complicated equipment, high noise, and difficulty in mass production.

Method used

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  • High-temperature solid phase reaction preparation of tungsten-aluminum carbide sosoloid powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1: the W 0.95 al 0.05 Alloy powder, purity greater than 97%, and carbon powder, particle size less than 300 mesh, purity greater than 95%, according to W 0.95 al 0.05 C weighing, C excess 6%, the total amount of raw materials is 15 grams, after ball milling and mixing, put it into a graphite crucible, then put it into a solid-phase reaction furnace, and heat it up to 1600 ° C under vacuum. After 5 hours of reaction, it was taken out and ball milled for 30 minutes. After another 5 hours of reaction, the product W can be obtained 0.95 al 0.05 c.

Embodiment 2

[0009] Example 2: the W 0.75 al 0.25 Alloy powder, the purity is the same as W 0.95 al 0.05 , same as carbon powder, particle size and purity, press W 0.75 al 0.25 C weighing, C excess 8%, the total amount of raw materials is the same as before, ball milling and mixing, put it into a graphite crucible, then put it into a solid-phase reaction furnace, under the protection of an inert gas, heat up to 1550 ° C, and take it out every 7 hours. Ball mill for 40 minutes. The total holding time reaches 14 hours to obtain the product W 0.75 al 0.25 c.

Embodiment 3

[0010] Example 3: W 0.5 al 0.5 Alloy powder, the purity is the same as W 0.95 al 0.05 , same as carbon powder, particle size and purity, press W 0.5 al 0.5 C is weighed, C is over 10%, and the total amount of raw materials is the same as before. After ball milling and mixing, put it into a graphite crucible, then put it into a solid-phase reaction furnace, and raise the temperature to 1450°C under the protection of a hydrogen reducing atmosphere. Every 10 hours of heat preservation, the ball was taken out and milled for 60 minutes, and the product W was obtained after 70 hours of reaction. 0.5 al 0.5 c.

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Abstract

A process for preparing the sosoloid powder of tungst aluminium carbide by high-temp solid-phase reaction includes such steps as proportionally mixing W1-xAlx alloy with high-purity carbon powder, ball grinding, loading in graphite, crucible, heating to 1300-1600 deg.C in vacuum reductive atmosphere, or inertial at mosphere in solid-phase reactor, and holding the temp for 10-120 hr while ball grinding for 30-60 min at 5-10 hr of intervals. Its advantages are good crystal state, less impurity pollution, short time, and no noise.

Description

technical field [0001] The invention belongs to a high-temperature solid-phase reaction preparation method of tungsten carbide aluminum solid solution powder. Background technique [0002] W 1-X al X C refers to a new type of cemented carbide formed by part of Al atoms entering the tungsten site in the WC lattice. W 1-X al X Compared with pure WC, C has the advantages of low density and low material cost. The material is expected to be applied in machining tools, glass cutting, forging dies, drawing dies, rolls, oil well drilling tools, mining drilling tools, excavation drilling tools and electrical contact materials. [0003] Chinese patent (Application No. 01129544.9) reports a preparation method of tungsten carbide aluminum, which uses W, Al, and C powder as raw materials, and obtains alloy powder in a non-equilibrium synthesis process through a mechanical alloying method. Although this method can synthesize W at room temperature 1-X al X C nano powder, but the lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C29/08
Inventor 马贤峰鄢俊敏汤华国赵伟祝昌军
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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