CN100443219C - Tungsten aluminium carbide hard alloy nanometer powder preparation method - Google Patents
Tungsten aluminium carbide hard alloy nanometer powder preparation method Download PDFInfo
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- CN100443219C CN100443219C CNB011295449A CN01129544A CN100443219C CN 100443219 C CN100443219 C CN 100443219C CN B011295449 A CNB011295449 A CN B011295449A CN 01129544 A CN01129544 A CN 01129544A CN 100443219 C CN100443219 C CN 100443219C
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Abstract
The present invention belongs to a method for preparing tungsten carbide aluminum hard alloy W1-xAlxC and the nano powder of the formula of X=0-0.86. With the method, tungsten powder, aluminum power, carbon powder and tungsten carbide powder are used as raw materials which are synthesized into the W1-xAlxC with a mechanical alloying method. The present invention has the advantages of simple process, convenient operation and room temperature synthesis. A product is the highly active nano powder which is favorable for further powder metallurgy sintering parts.
Description
Technical field
The invention belongs to a kind of tungsten carbide-aluminum hard alloy W
1-xAl
xC, the preparation method of x=0-0.86 nanometer powder.
Background technology
Carbide alloy tungsten carbide (WC) is important machining tool material, is widely used in car, digs, mills, boring, hinge, file, broaching and glass-cutting.Simultaneously, WC has extensive application at aspects such as forging die, drawing-die, roll, oil well drill pipe, mine drilling tool, cutting drilling tool and armor-piercing bullet cores.Though the Mohs' hardness of WC is+9, also there is big, the problems such as non-oxidizability is poor, density is big, poor in processability, material cost height of fragility, and is faced with the tungsten resource difficult problem of exhaustion day by day.By improving synthetic technology, adopt the cheap metal substitute tungsten of part that important practical sense is arranged.
Thereby the tungsten case that we adopt the aluminium that makes part to enter in the tungsten carbide forms stable compound.Part aluminium enters the density that tungsten position in the WC lattice can be reduced alloy effectively, and the non-oxidizability of material, toughness etc. are brought influence, reduces material cost simultaneously.The atomic radius and the tungsten of aluminium are approaching, but fusing point difference of the two and density contrast are very big, can't prepare alloy by the alloy melting method of routine, the method by high temperature cabonization obtains tungsten carbide-aluminum solid solution again.The synthetic of relevant tungsten carbide-aluminum solid-solution material do not appear in the newspapers so far.
Summary of the invention
The preparation method who the purpose of this invention is to provide a kind of tungsten aluminium carbide hard alloy nanometer powder.
This method is a raw material with tungsten powder, aluminium powder and carbon dust, by the synthetic W of mechanical alloying method
1-xAl
xC, x=0-0.86.The present invention utilizes modes such as the bump of mechanical alloying technology by steel ball, friction, shearing, mechanical kinetic energy is offered reaction system, guarantee each reactant excellent contact simultaneously, by surperficial solid phase reaction and diffusion, make carbon enter the interstitial void position of tungsten, the lattice position that aluminium enters tungsten, thereby the realization alloying, and obtain the alloy powder of nano-scale.
The step and the condition of the tungsten aluminium carbide hard alloy nanometer powder of the present invention preparation are as follows: less than 200 orders, purity is greater than 99.8% tungsten powder with granularity, and granularity is less than 200 orders, purity is greater than 99.5% aluminium powder, granularity is less than 300 orders, and purity is pressed alloy compositions W greater than 95% carbon dust
1-xAl
xC, the x=0-0.86 weighing, the excessive 5-10% of carbon puts into the high-energy ball milling jar, jar diameter be that 54 millimeters, height are 54 millimeters, mill jar and abrading-ball are carbon steel, ratio of grinding media to material is 15: 1, under argon shield ball milling 100-200 hour, obtains product.
The tungsten aluminium carbide hard alloy nanometer powder that the present invention obtains, turn out to be the symmetric WC structure of six sides by powder x-ray diffraction, all corresponding with the WC spectral line of each bar spectral line overlaps, diffraction maximum broadening but do not observe tangible displacement illustrates to enter behind the lattice not by aluminium the lattice to WC produces significantly distortion.The diffraction maximum broadening is the result of grain refinement, utilizes the Scherrer formula to calculate its grain size and is the 8-20 nanometer.
The present invention is a raw material with tungsten powder, aluminium powder and carbon dust, adopts the mechanical alloying device to realize that the reaction of stock yard obtains new carbide alloy.Preparation method of the present invention has the advantages that technology is simple, easy to operate, room temperature is synthetic.Product is that highly active nano powder helps further powder metallurgy sintered product.
The specific embodiment
Embodiment 1: with tungsten powder, granularity is less than 200 orders, and purity is greater than 99.8%, and with carbon dust, granularity is less than 300 orders, and purity is pressed WC metering weighing greater than 95%, and carbon is excessive 5%, raw material weight 10 grams, and steel ball 150 grams, ball grinder is put in argon shield.The vertically rotation of mill jar, rotating speed is 1280 rev/mins, 168 hours ball milling time, obtains WC powder.Calculate by the Scherrer formula, its crystal grain is less than 8 nanometers.
Embodiment 2: with tungsten powder, and carbon dust, granularity, purity are the same, aluminium powder, granularity is less than 200 orders, and purity is pressed W greater than 99.5%
0.5Al
0.5The C weighing, carbon is excessive 10%, and raw material total amount and ratio of grinding media to material are the same, 1280 rev/mins of rotating speeds, ball milling 168 hours obtains W
0.5Al
0.5C.Crystallite dimension is 8 nanometers.After argon shield, 1200 degree, annealing in 6 hours, the powder x-ray diffraction peak is sharp-pointed, the assorted peak of nothing, the product high-temperature stable.
Embodiment 3: with tungsten powder, aluminium powder and carbon dust are pressed W
0.14Al
0.86The C weighing, carbon is excessive 10%, and material purity, granularity, total amount, ratio of grinding media to material and mill jar rotating speed are the same, and ball milling 192 hours obtains W
0.14Al
0.86C.
Claims (1)
1. the preparation method of a tungsten aluminium carbide hard alloy nanometer powder is characterized in that, with granularity less than 200 orders, purity is greater than 99.8% tungsten powder, and granularity is less than 200 orders, and purity is greater than 99.5% aluminium powder, granularity is less than 300 orders, and purity is pressed alloy compositions W greater than 95% carbon dust
1-xAl
xC, the x=0-0.86 weighing, the excessive 5-10% of carbon, mill jar and abrading-ball are carbon steel, and ratio of grinding media to material is 15: 1, under argon shield ball milling 100-200 hour, obtains product; Described a kind of tungsten aluminium carbide hard alloy nanometer powder consist of W
1-xAl
xC, x=0-0.86.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011295449A CN100443219C (en) | 2001-06-26 | 2001-06-26 | Tungsten aluminium carbide hard alloy nanometer powder preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011295449A CN100443219C (en) | 2001-06-26 | 2001-06-26 | Tungsten aluminium carbide hard alloy nanometer powder preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1328889A CN1328889A (en) | 2002-01-02 |
| CN100443219C true CN100443219C (en) | 2008-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011295449A Expired - Fee Related CN100443219C (en) | 2001-06-26 | 2001-06-26 | Tungsten aluminium carbide hard alloy nanometer powder preparation method |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436006C (en) * | 2004-04-23 | 2008-11-26 | 许德成 | Preparation method of rare metal alloy nanometer powder |
| CN100427245C (en) * | 2006-08-28 | 2008-10-22 | 苏州江钻新锐硬质合金有限公司 | Control method of powder oxygen content in manufacturing process of ultrafine hard alloy |
| CN102554249B (en) * | 2012-03-02 | 2013-04-24 | 株洲弗拉德科技有限公司 | Method for preparing tungsten carbide based thermal spraying alloy powder |
| CN102660707B (en) * | 2012-06-08 | 2013-07-31 | 株洲硬质合金集团有限公司 | Production method for WC-Al4W pre-alloy powder |
| CN104057095B (en) * | 2014-06-25 | 2016-05-11 | 北京科技大学 | A kind of production line of low oxygen content carbide alloy mixture and production technology thereof |
| CN106825589B (en) * | 2016-12-30 | 2018-07-17 | 西安交通大学青岛研究院 | A kind of mechanical alloying preparation method of niobium metal powder |
| CN111534735A (en) * | 2020-05-20 | 2020-08-14 | 中国科学院长春应用化学研究所 | Tungsten carbide aluminum hard alloy without binding phase and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4834810A (en) * | 1988-05-06 | 1989-05-30 | Inco Alloys International, Inc. | High modulus A1 alloys |
| SU1748935A1 (en) * | 1989-10-27 | 1992-07-23 | Всесоюзный научно-исследовательский и проектный институт тугоплавких металлов и твердых сплавов | Method of producing fine-grain sintered hard alloy |
| US5279642A (en) * | 1991-09-05 | 1994-01-18 | Yoshida Kogyo K.K. | Process for producing high strength aluminum-based alloy powder |
-
2001
- 2001-06-26 CN CNB011295449A patent/CN100443219C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4834810A (en) * | 1988-05-06 | 1989-05-30 | Inco Alloys International, Inc. | High modulus A1 alloys |
| SU1748935A1 (en) * | 1989-10-27 | 1992-07-23 | Всесоюзный научно-исследовательский и проектный институт тугоплавких металлов и твердых сплавов | Method of producing fine-grain sintered hard alloy |
| US5279642A (en) * | 1991-09-05 | 1994-01-18 | Yoshida Kogyo K.K. | Process for producing high strength aluminum-based alloy powder |
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| CN1328889A (en) | 2002-01-02 |
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Granted publication date: 20081217 Termination date: 20100626 |