CBN (cubic boron nitride) is the second hardest cutting material according to diamond. This material is formed during a high pressure / high temperature process through a conglomeration of hexagonal boron- and lithium nitride. The manufacturing process is similar to the synthesis of diamond from graphite. Diamond is not suitable for machining ferrous materials. The high process temperatures of > 700 ° C in combination with the affinity to carbon cause graphitization of the diamond. The high chemical and thermal stability of CBN enables the machining of ferrous materials with the advantage of high abrasion rates. Today CBN is a well-established feed stock material for grinding wheels, which are mainly used for processing camshafts and crankshafts in the automobile industry. In order to meet the expectations of grinding processes around the automotive sector and in the filed of mechanical and aerospace engineering, CBN plays an important role today.
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