The present invention provides an ultra-fine grain tungsten copper alloy preparation. Specific steps are as follows:

1) Preparation of tungsten-copper composite powder tungsten oxide and ammonium nitrate as the raw material of copper, copper nitrate was first dissolved in deionized water to form a solution, a copper nitrate solution and then concentrated nitric acid solution of ammonium tungstate was added while stirring was continued 30 ~ 90min, then the precipitate was removed at 150 ~ 400 ℃ calcined 2 ~ 4h, and after grinding to obtain tungsten-copper composite oxide powder;

2) Reduction of tungsten-copper composite powder tungsten oxide copper oxide composite powder drainage pipe in breathable strong hydrogen reduction furnace to obtain a uniform dispersion of nano-tungsten-copper composite powder, reducing the temperature of 650 ~ 750 ℃, reducing time 1 ~ 1 .5h, hydrogen flow rate 25 ~ 45ml / min.cm2;

3) The above press forming tungsten-copper composite powder press molding for compacts, unit pressure 100 ~ 250MPa;

4) sintering of ultra-fine grain tungsten copper alloy obtained in step 3 compacts were hydrogen sintering at 1150 ~ 1250 ℃, holding time of 90 to 120 minutes, after ultra-fine grain sintered tungsten-copper alloy.


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The present invention describes a tungsten carbide particulate reinforced metal matrix composite wear-resistant roller. Characterized in that:

The wear-resistant roller by the mother, the composite layer and outer rims of three parts, sintered composite layer made ​​of nickel-based alloys and cast WC particles are made ​​of nickel-based alloy powder composition which, the quality of the percentage of C: 0.7 ~ 0. 8, Si: 3.5 ~ 4.5%, B: 2.8 ~ 3.6%, Cr: 11 ~ 14%, Fe: 35 ~ 40%, the remainder being Ni, Ni-based alloy powder particle size of 105 ~ between 140 microns and the percentage by volume of tungsten carbide grain size 1 ~ 1.5mm:30 ~ 40%, 0.5 ~ 1mm:25 ~ 35%, 0.3 ~ 0.5mm:25 ~ 35%; the nickel-based alloys and cast WC particles in a volume ratio of 2 to 3:1.

The present invention has an impact and loads in wear resistance, hardness and toughness can make it higher than the high chromium cast iron and alloy wire welding tungsten carbide particulate reinforced metal matrix composite wear-resistant roller, this roller medium speed mill is mainly used for electric power, cement and other industries on.


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The present invention provides a direct alloying tungsten ore steelmaking process. Specific steps are as follows:

1) First, the preparation of carbon-containing tungsten ore of tungsten ore pellets

a. carbon-containing tungsten ore pellets, including 80% to 85.5% of tungsten ore, 13% ~ 16.5% of the reducing agent, 1 to 2% of the catalyst, 0.5% ~ 1.5% binder ;

b. tungsten ore, reducing agents, catalysts were crushed and ground to a powder;

c. above powder mixed;

d. adding a binder to the powder compacts made ​​of the carbon bonded tungsten ore pellets;

2) The direct alloying steel tungsten mine, process as follows:

a. scrap, tungsten ore pellets containing carbon, silicon carbide or ferrosilicon smelting furnace loading, and smelting;

b. on Oxygen flux control, blowing late in the melting of choice;

c. melting and oxidation of low alkalinity of slag process;

d. later. baked desulfurization refining + vacuum degassing, the final casting.

The present invention is an enhanced solid state reduction process, at the end of the melting of the reduced rate of tungsten ore reached more than 90%, plus a reducing agent by reduction of further depleted, can yield more than 95% tungsten, solved when the furnace with direct alloying tungsten ore, tungsten ore reduction slow solid, solid-state reduction rate, low tungsten collected directly alloying slag large problem; present invention is equivalent to a single-step process that can save the investment and energy consumption.


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The present invention provides a multi-processing methods of rare earth complex swaging tungsten electron emission materials. Specific steps are as follows:

1) The percentage by weight, containing La2O3, Y2O3, and CeO2 each rare earth oxide content of 0.4 to 1.4% and the total content of the three rare earth oxide is from 2 to 2.2% and the balance is tungsten the rare-earth sintered tungsten billet into B203 swaging machine for processing, rotary forging temperature of 1625-1675 ℃, feed rate 1-2m / min, for conventional vertical billet 13X13X450mm melt using a die change system for: Φ13 -Φ12.5-Φ12-Φ11.2-Φ10.5-Φ10-Φ9.5-Φ9.0-Φ8.5-Φ8.0-Φ7.5-Φ7.0-Φ6.5;

2) The sample B203 after swaging under a hydrogen atmosphere annealed to eliminate stress, annealing temperature 2150-2250 ℃, feed rate of 0.7-0.9m / min;

3) The rare earth tungsten material annealed into B202 swaging machine for processing, swaging temperature: 1425-1475 ℃, feed rate: 2-3m / min, die change system: Φ6.0-Φ5.6- Φ5.2-Φ4.8-Φ4.4-Φ4.1;

4) The rare earth tungsten material was placed B201 B202 after forging swaging machine for processing, swaging temperature: 1325-137 5 ℃, feed rate: 3-4m / min, die change system: Φ3.8-Φ3 .5-Φ3.25-Φ3.0.

The present invention is adapted to changes of mechanical properties of composite rare earth tungsten multi-electron emission materials, using the rotary forging temperature of 1625-1675 ℃ conduct B203 rotary forging, swaging billet, as amended, 2150-2250 ℃ after rapid thermal annealing, and then in 1425- 1475 ℃ were swaging B202, B201 finally swaged at 1325-1375 ℃, can be processed by the above method for preparing a variety of specifications Φ3.0-Φ12.0 rare earth tungsten rod. This method low energy consumption, product yield.


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The present invention provides ultrafine tungsten carbide, preparation methods for preparing a mixture of cobalt. Specific steps are as follows:

1) A soluble organic cobalt compound is dissolved in the solution, whichever solution is clear and transparent;

2) The organic solution of a cobalt compound 2) and ultra fine tungsten carbide powder having a volume 5-10 times of its mixing, a method to coat the organic cobalt compound is coated on the tungsten carbide surface sink;

3) Spray drying the liquid medium is evaporated to dryness, the organic cobalt compound is uniformly coated on the surface of a tungsten carbide particle;

4) Through the reduction of the metal cobalt evenly coated on the outer surface of each particle tungsten carbide, it forms a layer of tungsten carbide and cobalt .

The method is simple and easy to make, short process, but also make tungsten carbide, cobalt structured uniformly mixed, so that a subsequent step alloy sintered uniform shrinkage during curing, avoid WC grain growth during sintering, so hard for the final the curing process can be prepared carbide grain size of the alloy with the initial size of the ultrafine particle size fit carbide to provide a strong guarantee.


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The present invention provides a method for processing a tungsten alloy wire. Specific steps are as follows:

① The ammonium paratungstate melting into blue tungsten oxide powder, then doping K2SiO3 liquid and oxide can promote the growth of the grains were substantial and rapid mixing;

② The above two raw material reduction;

③ After the material is reduced by pickling;

④ Adding rare earth elements in the material after pickling solution after burning sifting mixing, then twice restored;

⑤ Sifting mixing;

⑥ Pressed into a billet;

⑦ Sintering or sintering at twice the vertical medium frequency induction melting furnace;

⑧ Swaging blooming in turn, crystallization annealing, swaging process, recrystallization annealing, rotary forging processing, drawing, stress relief annealing;

⑨ Fine processing.

Advantage of the present invention are:

1. Machined tungsten alloy wire suitable for further processing, with good plasticity, can be processed to Φ0.30mm following specifications.

2. High product yield machined tungsten alloy wire manufactured long life.


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The present invention provides a method for preparing a tungsten sponge. Belonging to the microwave electric vacuum device manufacturing technology, as follows:

1) The low-temperature vacuum furnace tungsten powder calcined degassing;

2) Tungsten powder filling and cold isostatic preparing tungsten blanks;

3) Low-temperature sintering furnace hydrogen tungsten blanks, roughing, high temperature sintering furnace hydrogen tungsten blanks;

4) Hydrogen furnace leaching copper tungsten blanks obtained tungsten rod, tungsten copper rod finishing, chemical and high-frequency method to remove the copper tungsten copper, tungsten cavernous finally obtain the required parts.

Note: The low temperature in a vacuum furnace burn-degassed, increase one pair of tungsten powder, high-speed jet grading treatment processes, removal of ultrafine particles of tungsten powder and coarse particles to obtain tablets marked by the tungsten powder tungsten grain size grading close powder.

The process of the present invention is commercially available micron tungsten powder particle size is greater than about 85% below 2 microns ultrafine particles of tungsten and 90% of the effective removal of coarse particles, the ultrafine particles to reduce clogging of the pores between the particles of tungsten, and the coarse the particles tend to form coarse voids phenomenon which achieves the purpose of uniform porosity sponge tungsten.


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The present invention provides a fine-grained non-magnetic tungsten - copper alloy activation sintering method. Characterized in that:

Tungsten-copper composite powder as raw material, and then molded tungsten copper powder required for the body shape, and then by cold isostatic pressing process, the preparation of a relative density of 50% -70% of the body, the body is placed a sintering furnace under a hydrogen atmosphere or a mixed atmosphere of hydrogen and a protective atmosphere, a protective atmosphere of high purity nitrogen or argon, and then a heating rate of 5 ℃ / min to a temperature of raw 375-400 ℃, extrusion molding incubated 1 hour agents, the final low temperature activation sintering.

Among them, the low temperature activation sintering process requirements are as follows:

1) at a heating rate of 5 ℃ / min up from 375-400 ℃ to 800 ℃, incubated for 1 hour;

2) at a heating rate of 5 ℃ / min up to 800 ℃ to 900 ℃, incubated for 1 hour;

3) at a heating rate of 1 ℃ / min up to 900 ℃ from 1090 ℃;

4) at a heating rate of 3 ℃ / min up to the sintering temperature from 1090 ℃ 1100-1340 ℃, holding time of 40-60 minutes;

5) when the temperature is lowered to 1000 ℃, the through-the high-purity argon gas or nitrogen gas atmosphere for one kind of to eliminate influence of hydrogen embrittlement, the furnace was cooled to room temperature.

Prepared by the invention of high-density tungsten - copper alloys have excellent mechanical properties and thermal conductivity, effectively preventing the copper segregation, with fine grain size, high strength, high ductility and thermal conductivity.

The invention process is simple, easy to control, no pollution, low investment cost, low power consumption, suitable for industrial scale production.


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Chromium-tungsten alloy solid solution preparation method

The present invention provides a method of preparing a powder pressure sintering tungsten chromium alloy solid solution, which is characterized in that:

The microstructure of this material is a single-phase solid solution of chromium tungsten.

Specific steps are as follows:

1) Select a particle diameter of 6 ~ 10μm, purity greater than 99.9%, the oxygen content of the tungsten powder 500 ~ 800ppm; selected diameter of 45 ~ 100μm, a purity greater than 99.9%, an oxygen content of 800 ~ 1500ppm chromium powder, tungsten powder mass ratio of 50% to 93%, 7% to 50% of the proportion of chromium powder into the blender;

2) In the tungsten powder mixer, chromium tungsten powder by powder, chromium powder, 2 to 5% of the total mass of the process control agent is added and mixed in a blender 3.5 to 5 hours, the process control agent of volatile organic solvent;

3) The last step mixed powder granulation;

4) The granulated powder is molded or after cold isostatic pressing, a pressure of not less than 50MPa, the blank as far as possible compaction;

5) The press good reduction under hydrogen blank 900 ℃ ~ 980 ℃ 50 ~ 90 minutes, 1450 ℃ ~ 1600 ℃ sintering or hot isostatic pressing sintering 2 to 4 hours, the solid solution that is made of tungsten-chromium alloy .

Chromium-tungsten alloy solid solution obtained by the present invention for preparing fine, dense structure with high hardness, a low value and a high resistance to closure of voltage intensity.


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The present invention provides a preparation of elemental tungsten film, which comprises the following process:

The substrate was heated to 100 ~ 150 ℃; then in a magnetron sputtering apparatus, a pure tungsten target in an argon gas atmosphere tungsten sputter deposited on the substrate film.

Elemental tungsten film nanomechanical properties prepared by the method of the present invention uniformly excellent, nano-hardness is more than three times the hardness of tungsten block, organized, distribution, good protective performance and fine grain tungsten film, with more grain boundaries, and well bonded to the substrate, and thus more conducive to get WS2 solid lubricant film further sulfide treatment, magnetron sputtering method according to the invention is simple, reliable technology, applicable to the preparation of a wide range of films.


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