Mechanical characteristics of tungsten-free hard alloys (review)

Titanium carbide- or carbonitride-base tungsten-free hard alloys with a nickel-molybdenum binder, which can effectively replace tungsten alloys in metal and alloy cutting, are examined. The proper choice of the composition and grain sizes of the carbonitride component allows the bending strength of 1500 MPa and hardness of 90–91 HRA to be reached. High-temperature hardness and fracture toughness are of the same order as those of hard tungsten alloys.