CUTTING TOOL MATERIALS

The chart below shows the relationship between various tool materials, in relation with hardness on a vertical axis

and toughness on a horizontal axis.

Today, cemented carbide, coated carbide and TiC-TiN-based cermet are key tool materials in the market, as they

offer a good balance of hardness and toughness.

Diamond Coating Sintered Diamond Sintered CBN Ceramics

Coated Cermet Cermet

Coated Carbide Coated Micro-grain Cemented Carbide Coated Micro-grain Cemented Carbide HSS Cemented Carbide Powder HSS HSS Toughness

GRADE CHARACTERISTICS

Hard MaterialsHardness (HV)Energy Formation (kcal/g · atom)Solubility in Iron (%.1250r)Thermal Conductivity (W/m·k)Thermal Expansion (x 10-6/k)Tool Material
Diamond>9000Highly Soluble21003.1Sintered Diamond
CBN>450013004.7Sintered CBN
Si3N416001003.4Ceramics
AI2O32100-100i0297.8Ceramics Cemented Carbide
TiC3200-35217.4Cermet Coated Carbide
TiN2500-50299.4Cermet Coated Carbide
TaC1800-400.5216.3Cemented Carbide
WC2100-1071215.2Cemented Carbide

* 1W/m • K=2.39×10-3cal/cm • sec • r