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 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 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 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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