Page 3 - Carmex - Diamond Tools

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PCD

PCD is a composition of diamond particles sintered together with a metallic binder. The polycrystalline
structure creates a hard and wear-resistant tool with high thermal conductivity to quickly transfer heat
away from the cutting edge. Since diamond is the hardest material available, it provides the highest

abrasive resistance. PCD tools are used for non-ferrous materials, high-silicon aluminum, carbon fiber,
and plastic (CFRP).

CVD

The CVD cutting material is harder than PCD and twice as wear-resistant. CVD delivers various

benefits when machining long-chipping aluminum and magnesium alloys, high-silicon aluminum,
precious metal alloys, plastics with abrasive fillers, tungsten carbide, and ceramic green compacts.
Laser equipment is used to cut out the segments from the CVD-thick film. These are then attached

to inserts by brazing under vacuum. The chip breakers and cutting edges are also laser formed. The
advanced chip breaker reduces contact of the chip with the insert surface, which considerably reduces
heat generation and energy consumption. In addition, the controlled chip breaker increases process

reliability and reduces cutting forces.

PCBN

Its high heat resistance combined with the high level of hardness, which is second only to diamond,
makes PCBN the ideal cutting material for machining hardened steels. In addition to the machining of

hardened steels (45-72 HRC), this cutting material group is also highly suited to the machining of cast
materials and special alloys—applications in which carbide and cutting ceramic tools often reach their

limits. CBN material provides excellent heat resistance and can be used at very high cutting speeds. It
also enhances toughness and thermal shock resistance.

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