Free-standing CVD Diamond
Cutting Tool Material
 
CVDITE CDM been engineered for mechanical applications such as the machining of highly abrasive non-ferrous metals, plastics and wood-based materials and for wear-part applications.

CVDITE CDM is a diamond material with both good fracture strength and toughness. Because CVDITE CDM contains no metallic binder phase, it has very high thermal conductivity and excellent thermal oxidation resistance, making it suitable for both high- speed and dry machining of highly abrasive composites - a growing trend within the cutting tool industry.

 

 

 
Tool Fabrication
CVDITE CDM is a grade of material which can be mechanically ground in a similar manner to natural and MONOCRYSTAL diamond. Supplied as a free-standing solid plate of diamond, 0.5 mm or 0.2 mm in thickness, CVDITE CDM has been prepared with one fine lapped surface. This is the preferred surface for bonding. Brazing to tungsten carbide substrates can be carried out in a vacuum furnace or reducing gas atmosphere, using high temperature active braze alloys. CVDITE CDM also has highly polished face which is recommended as top table or rake face of the tool. This is beneficial in producing a sharp, chip-resistant cutting edge.

CVDITE CDM contains no solvent/catalyst metal or electrically conductive binder phase and therefore requires mechanical grinding (as opposed to EDM machining) to produce suitable cutting edge geometries. Diamond grinding wheels, which are conventionally used for processing PCD tools, can be used effectively. Recommendations on mechanical grinding of CVD diamond are available on request.

 

 

return to top

Applications
CVDITE CDM extends the range of cutting tool materials available. The diagram below gives an indication as to where CVDITE CDM may be evaluated in relation to machining operation and workpiece material.

 

 

Availability
CVDITE CDM is available ex stock in the shapes and sizes detailed in these tables. Other shapes and sizes may be available on request according to blank size and quantity.


 

return to top