HIGH-DENSITY AND HIGH-STRENGTH WC-BASED CEMENTED CARBIDE

摘要

The synthesis of high performance WC—Co cemented carbides which can be efficiently used in the cutting tool industry. WC with different particle sizes and different grain growth inhibitors were consolidated through spark plasma sintering technique and to form a cemented carbide with best combination of mechanical properties. VC and Cr3C2 are included as grain growth inhibitors in different amounts and combination to the WC—Co powder composition. Higher amount of inhibitors results in lower grain sizes and higher hardness values, however adding more than a crucial amount was observed to degrade the mechanical properties.

主权项

1. A spark plasma sintered tungsten carbide-cobalt cemented carbide, comprising:
tungsten carbide particles having an average particle size of less than 20 nm, a cobalt metal matrix, a vanadium carbide grain growth inhibitor, and a chromium carbide grain growth inhibitor.