Manufacturing Industry
MATERIALS - Sumitomo Electric develops 30% harder sintered CBN
Advanced Ceramics Report, September, 1994
Japanese company Sumitomo Electric Industries Ltd has developed a cubic boron nitride (CBN) sintered compact which it claims is 30% harder than its current product.
The new 'SumiBoron BN600' product is used in cutting tools for the processing of special steels found in steel rolling rollers and in the heat resistant alloys of jet engines.
SumiBoron BN600 has very low levels of titanium nitride and carbon nitride, usually used to bond the CBN crystals together, raising the CBN content in the sintered compact to 90%. This makes the compact 30% harder than those previously available, giving it a value of 4000 on the Vickers Hardness Scale.
However, sintered compacts used in rough machining of the rollers used in steel rolling must be tough as well as...
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