Large-scale production of chromium carbide powder for cost reduction
Chromium carbide powder is often irregular grayish-black particles with a particle size of 10-40μm, a purity of ≥98%, and a free carbon content of ≤0.5%. It features high hardness and excellent wear resistance, with a bulk density of 2.9-3.2g/cm³, and is suitable for thermal spraying and surfacing processes. It is widely used for surface strengthening of easily worn parts such as mine crusher liners and metallurgical roller tracks, effectively resisting material erosion and extending the service life of equipment. The main methods for preparing this powder include the electric arc furnace method and the carbothermal reduction method. Among them, the powder produced by the carbothermal reduction method has a finer particle size and a lower cost, making it suitable for large-scale application. When the oxygen content of the powder is less than 0.2%, it can reduce the pores and inclusions in the coating and improve the density of the coating. After spraying chromium carbide powder on the surface of the valve tappets of a car engine, the wear of the tappets can be reduced by 80%, and the major overhaul cycle of the engine can be prolonged
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