2007年2月4日 星期日

CBN(cubic Boron Nitride) www.tool-tool.com

The cubic Boron Nitride which has the hardness and thermal conductivity after the diamond has small reactivity with the iron system materials and is more excellent in the chemical and thermal stability than those of the diamond.
Because of these properties, the cubic Boron Nitride has been paid attention as the tool material that is useful for machining of iron system materials for which the diamond was unavailable.

cBN is synthesized artificially with the condition of the high pressure and at the high temperature as the same as the diamond.
At present, cBN is manufactured under an ultra high pressure high temperature.
The characteristic of mechanical and themal properties of cBN are influenced largely by the kinds and addition quantities of the binders that are used in the case.

Polycrystalline type cBN has an excellent characteristic for cutting tools to machine the cast iron and heat resisting alloy, and the composite type cBN has one to machine the quenched steel. Making the most of such a characteristic cBN is used to the high efficiency cutting tool of the iron system hard material such as automobile parts such as the engine block and gear, shaft, bearing.


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Reference source from the internet.
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