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The core advantage of tungsten carbide products made by powder metallurgy is that by adjusting the WC particle size (0.2-10μm), cobalt content (3%-30%) and sintering process (such as low-pressure sintering or HIP post-treatment), the product hardness (HRA85-94), fracture toughness (6-15MPa·m¹/²) and thermal expansion coefficient (5.2-6.5×10⁻⁶/℃) can be precisely controlled. For example, cemented carbide suppliers can provide gradient structure design (gradient change of surface cobalt content) for fine stamping dies to take into account both edge wear resistance and matrix impact resistance, while supporting integrated molding of complex internal cooling channels (depth-to-diameter ratio 10:1).
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