What are the Properties and Uses of Spherical Tungsten Carbide

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Since 2022, Russia-Ukraine geopolitical conflicts have intensified, and global energy prices have risen sharply, with international natural gas prices hitting historic highs. As the most important transitional energy source in the transition from fossil energy to non-fossil energy, the share of natural gas in primary energy has increased from 14.6% in 1965 to 24.7% in 2020.  The global gas price indices showed a unilateral downward trend from 2018, bottomed out in 2020, and remained low for a long time. However, since July 2020, the global gas prices have gradually fluctuated upward, and the impact of geopolitical events made the Dutch TTF gas price even hit record highs repeatedly.

An analyst of a securities company believes that the core catalyst of this round of global gas market lies in the lack of investment in upstream oil and gas resources caused by long-term low prices. Since 2020, although the epidemic has led to a decline in demand, the decline in supply has been faster, resulting in a large inventory consumption. In 2021, demand will recover faster than supply (the supply-side is less sensitive to prices, which will be reflected in investment).  

As the world's two largest gas Tungsten Carbide are also expected to change significantly.

What is 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.

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 tungsten carbide

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 tungsten carbide powder

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, and droplets will form on the surface under the action of centrifugal rotation method, rotary atomization method or gas atomization method Spherical tungsten carbide.

Modified irregular tungsten carbide: The irregular 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.

Uses of spherical tungsten carbide

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.

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Overall, the demand for Tungsten Carbide is on the rise, and future Tungsten Carbide will continue to evolve. Although the prosperity of the brand name has rebounded, there are still many outstanding problems in Tungsten Carbide, and the Tungsten Carbide will develop steadily，if you need Tungsten Carbide please contact us.

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