Cutting materials

Wear resistance of diamond grades compared with conventional hard metal cutting edges

Diamond cutting materials

Monocrystalline diamond

MDC - Monocrystalline diamond – the hardest known mineral
Thermal conductivity: very high
Hardness at 100° Celsius: 10000 Vickers
Hardness at 600° Celsius: 10000 Vickers

CVD - Solid polycrystalline diamond

CVD - Solid polycrystalline diamond without binder
Thermal conductivity: very high
Hardness at 100° Celsius: 9000 Vickers
Hardness at 600° Celsius: 9000 Vickers

PDC – Polycrystalline diamond

PDC – Polycrystalline diamond – compound material with a diamond layer of approx. 0,5-0,8mm, grit size 2-8µ
Thermal conductivity: high
Hardness at 100° Celsius: 9000 Vickers
Hardness at 600° Celsius: 9000 Vickers

Compared with conventional hard metal cutting edges

Compared with conventional hard metal cutting edges:
Thermal conductivity: very low
Hardness at 100° Celsius: 1900 Vickers
Hardness at 600° Celsius: 1000 Vickers

PcBN – cutting materials

PcBN – BH = 95 – 75% percentages

PcBN – BH = 95 – 75% percentages
Thermal conductivity: high
Hardness at 100° Celsius: 3500 Vickers
Hardness at 600° Celsius: 2400 Vickers

PcBN – BL = 70 – 55% percentage

PcBN – BL = 70 – 55% percentage
Thermal conductivity: medium
Hardness at 100° Celsius: 3400 Vickers
Hardness at 600° Celsius: 2400 Vickers

Comparison – hard metal vs ceramics

Comparison – hard metal
Thermal conductivity: very low
Hardness at 100° Celsius: 1900 Vickers
Hardness at 600° Celsius: 1000 Vickers

Comparison - ceramics
Thermal conductivity: lowest
Hardness at 100° Celsius: 2100 Vicker
Hardness at 600° Celsius: 1300 Vickers