PCBN - Polycrystalline Cubic Boron Nitride Polycrystalline cubic boron nitride (PCBN) tool materials represent a revolutionary advancement in cutting tool technology. For the manufacturer, the benefits are: increased productivity, longer tool life, better surface finish, and the ability to hold closer tolerances. PCBN is used for machining a wide variety of ferrous materials. PCBN provides increased productivity and cost savings over conventional tungsten carbide and ceramic tools. In many cases PCBN tools make it possible to machine materials where conventional tools have failed. PCBN products from MegaDiamond are available in large full-round blanks. MegaDiamond also offers pre-cut pieces to exact customer specifications. Typical PCBN Applications Typical materials machined with PCBN include:
MegaDiamond's technical staff is available to advise customers on the suitability of PCBN tools for specific materials and applications. PCBN Technology After diamond, cubic boron nitride (cBN) is the second hardest material known and like diamond has extremely high resistance to abrasive wear. cBN does not occur naturally, but is synthesized under ultra-high pressure and high temperature by converting hexagonal boron nitride (hBN) to a cubic crystal structure with a strong tetrahedral core similar to diamond. Unlike diamond, cBN is not highly soluable in iron; therefore, cutting tool materials produced from cBN are especially suitable for machining ferrous materials. cBN also has higher thermal and chemical stability than diamond at elevated temperatures. By applying ultra-high pressure and high temperatures to a combination of cBN powders with added metallic and/or ceramic second phase materials, MegaDiamond produces a variety of Polycrystalline Cubic Boron Nitride (PCBN) grades with distinct properties. Each grade is specifically engineered to meet the demands of particular machining applications. |