What are the Properties of Spherical Tungsten Carbide

(What are the Properties of Spherical Tungsten Carbide)

What is spherical tungsten carbide

As one of the main production raw materials of cemented carbide, the physical
and chemical properties of tungsten carbide (WC) powder, such as particle shape,
particle size, particle size distribution, oxygen content, carbon content, bulk
density, etc., will directly affect the quality of alloy products. Nowadays,
with the gradual optimization of the production process of cemented carbide, the
market demand for spherical tungsten carbide powder is also increasing.

Spherical tungsten carbide is mainly composed of refractory metal tungsten
and non-metallic carbon, and contains a small amount of impurity elements such
as Co, Cr, Ti, Ta, Nb, V, Mn, Ni, Mo, O, etc. According to the different
particle size, it can be divided into the following grades, WC10 (1.01~1.40um),
WC30 (3.01~4.00um), WC50 (5.01~7.00um), WC100 (10.01~14.00um) and so on.

Properties of spherical WC powder

Appearance is black powder, high purity ≥99.9%, sphericity ≥95%, melting
point is 2870℃, boiling point is 6000℃, density is 15.63g/cm³, bulk density is
greater than 7.0g/cm3, tap density is greater than 7.0. 5g/cm3, the flow
performance is less than 10.0s/50g, and has the characteristics of high
hardness, low thermal expansion coefficient, high compressive strength, large
elastic modulus, and smooth surface. However, due to its high hardness, its
processing performance is poor, so it is more suitable for 3D printing.

Production process of spherical WC powder

1. Smelting method: The raw material powder (tungsten powder and carbon black
or tungsten powder, carbon black and tungsten carbide) is melted into a liquid
state. Under the action of centrifugal rotation method, rotary atomization
method or gas atomization method, the droplets will be Spherical tungsten
carbide is formed on the surface.

2. Modified irregular shape tungsten carbide: The irregular shape WC is
melted into a liquid state, and then the spherical tungsten carbide powder is
made by the plasma spheroidization method or the resistance heat spheroidization
method.

The use of spherical WC powder

Mainly used in the production of cemented carbide. According to different
chemical compositions, cemented carbides can be divided into tungsten-cobalt,
tungsten-titanium-cobalt and tungsten-titanium-tantalum (niobium) types.

About 3dprintingpassion

3dprintingpassion is a trusted global chemical material supplier & manufacturer with
over 12 years experience in providing super high-quality chemicals and
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(What are the Properties of Spherical Tungsten Carbide)