The application of tungsten carbide powder in cemented carbide tools

In today's industrial field, cemented carbide tools such as cutter, oil wells drilling bits, impact drilling bits, etc., are gradually replacing traditional tool materials with their excellent thermal, mechanical and chemical properties. The core raw material of this high-quality tool is Tungsten Carbide Powder (WC powder), which is made by a special process of powder metallurgy.

Compared with conventional tools, cemented carbide tools show significant advantages, including great hardness and strength, excellent red hardness, wear resistance, toughness, heat resistance and corrosion resistance. It is particularly striking that the hardness and wear resistance of cemented carbide tools can remain stable even at a high temperature of 500 ° C, while at 1000 ° C, its hardness is still quite high. These excellent properties are attributed to the unique properties of WC powder.

Tungsten carbide powder is a black hexagonal crystal powder with a metallic luster, melting point up to 2870 ° C, boiling point to 6000 ° C. Its hardness is comparable to diamond, with good electrical and thermal conductivity. At room temperature, the relative density of WC powder is about 15.63g/cm³. It is insoluble in water, hydrochloric acid and sulfuric acid, but it can be easily dissolved in mixed acids such as nitric acid-hydrofluoric acid.

Tungsten Powder is the key raw material for manufacturing tungsten carbide powder. Ensuring the quality of cemented carbide tools, there are strict requirements for the purity, particle size and particle size distribution of tungsten powder.

Thus, it is necessary to introduce a simple and can produce fine and evenly distributed tungsten powder method:

First, putting the blue tungsten oxide or yellow tungsten oxide powder into the ball grinder for milling together with deionized water, slurry will be ready after the grinding materials through the screen. Next, the slurry is mixed with blue tungsten or yellow tungsten oxide powder in a certain proportion, and then the mixture is screened and granulated. Finally, the granulation is treated with hydrogen reduction to obtain fine tungsten powder.