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China Tungsten Carbide Coated Blade Production Manufacturing

Tungsten carbide coated blades combine a tough substrate, often high-speed steel or carbide, with a thin tungsten carbide layer for superior hardness and wear resistance. Production involves powder metallurgy for the carbide coating, applied via processes like chemical vapor deposition or plasma spraying. Manufacturing emphasizes precision to ensure durability in cutting applications like industrial slicing or machining.

Production Process
Raw tungsten and carbon powders mix with cobalt binder, then undergo ball milling for uniformity. The mixture compacts under hydraulic pressure into a green body, followed by high-temperature sintering at 1,400-1,500°C to form dense tungsten carbide. For coatings, the sintered carbide particles bond to blade bases via brazing or thermal spraying in controlled furnaces.

Coating Application
Blades receive tungsten carbide coatings through physical vapor deposition (PVD) or chemical vapor deposition (CVD), depositing fine grit for edge sharpness. Plasma or high-velocity oxy-fuel (HVOF) spraying fuses carbide particles onto the substrate, enhancing corrosion and friction resistance. Finishing includes grinding and polishing to achieve precise geometries.

Quality Control
Dimensional checks, hardness testing (often exceeding 1,500 Vickers), and edge inspections ensure standards. Heat treatments relieve stresses, while surface analyses verify coating adhesion. Blades undergo performance trials simulating industrial use before approval