When Diamonds? / When boron nitride tools?

When Diamonds?

Diamond tools are used for processing of:

  • Hard metall
  • Ceramics
  • Glass
  • Rubber
  • Plastic
  • Non-ferrous metal
  • Curable hard materials
  • Super nickel alloy
  • Ferrites
  • Armouring
  • Steels with lower hardnes

When boron nitride tools?

Cubique boron nitride CBN is mainly used for:

Hardened ferrous alloy (alloyed high) like:

  • Tool steels
  • Die steel
  • Ball bearing steel
  • Stainless steel
  • Ferroalloys (partially soft)
  • Armouring
  • Hard high-temperature materials on cobalt or nickel basis
  • Super nickel alloys

Diamonds/ Monocrystalline/ Industrial Diamonds

Our blocky but well cutting diamonds are common in the industrial technology in grinding-, lapping and polishing processes.
The diamond shows a monocrystalline lattice structure, the slidings are parallel to the optical axis.
Under pressure the monocrystalline diamond grain along the parallel cleavage plane brokes. Through this grains in blocking Form with sharp cutting edge arrise.

Diamond is the hardest known material. First only used as a natural diamond, which has, sorted after size, had been grinded or subjected to a surface treatment. Only since the development of the diamond synthesis technology diamond grains with controlled properties can be produced.

The form of the crystal can be influenced in a way that she is either irregularly and sharp or a complete octahedron is while simuntaneously the strength of the cristal can be adjusted over a higher value range.

During production of the synthetic diamond grains processing procedures and quality controlls are very important. The grains are not only sorted according to size and form, but also regarding purity, strength and thermical stability.

CBN Black (cubic boron nitride)

Cubic boron nitride (CBN) is, after the synthetic diamond, the second hardest material and will be synthesized from hexagonal boron nitride under conditions similar to the ones of production of synthetic diamond of graphite. Desirable properties of an abrasive are big hardness, thoughness, abrasion resistance, thermical and chemical stability as well as the ability during use to keep the sharp cutting edges.

Hardness is a crucial property for every abrasive. However, most of the abrasives suffer under high temperatures during application a hardness loss. One of the physical benefits from CBN after conventional abrasives is that the higher hardness during ambient temperature over a high temperature area remains the same.

CBN abrasives allow during grinding,honing and fine finishing of hardened ferrous materials und difficult machinable alloy in comparison to traditional abrasives a higher productivity and considerably longer tool lifes.
CBN is during grinding of tools as well as grindings for mass production firmly established and is used in the automotive industry as well as in the general mechanical engineering and the aerospace industry. Application examples are camshafts, crankshafts, injectors, transmission parts, transmissions, constant velocity joints, steering parts and components of compressors.  Among the many benefits of CBN is the approved surface finish and the production of favorable residual compressive stress on the surface.

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