468 Каталог TUNGALOY 2007 Режущий инструмент Точение Фрезерование Сверление Стр.462

Каталог TUNGALOY 2007 Режущий инструмент Стр. 462 0468 ENG Lab2u

Grades Polycrystalline Cubic Boron Nitride Compacts (PCBN) T-CBN Application K Difficult-to-cut materials BX90S BX950 BX480 BXC30 BX330 H Hard materials This is a tool material in which fine crystals of cubic boron nitride (the hardest material next to diamond) are tightly compacted and sintered on the cemented carbide base using special binder under high temperature and high pressure. The hardness is more than twice that of cemented carbide with the hardness at high temperature exceeding that of cemented carbide. CBN has no tendency to react with ferrous materials (which is different from the case with diamond) and is thus suitable for high-speed cutting of cast iron finishing of the hardened steel cast iron ferrous sintered metals (valve seat etc.). Also this material is suited for finishing of super heat resistant alloys. The use of CBN sintered material enables the finish surface accuracy (expected only through grinding up to now) simply by cutting. Polycrystalline Cubic Boron Nitride Compacts (PCBN) T-CBN Transverse Coating layer Application Grade Microstructure Hardness (Hv) rupture strength (GPa) Main composition Thickness ( m) Features BX90S - r.o v For high speed finishing to roughing of cast irons and rolled steels. Solid CBN. Higher heat conductivity. BXC90 - - r.o "' i y.- v - - r 3900-4100 1.80-1.90 (PVD) 1 Coated solid CBN. In addition to feature of BX90S used corners are known at a glance. K Cast irons BX930 V Sy V Vv 1 f. - j. 3000-3200 0.95-1.20 Used for high-speed turning of grey and ductile cast irons. Features moderate content of CBN sintered with special ceramic binder and excels in impact resistance. BX950 V- "i 7 V v - -. r .k. 3900-4100 1.80-1.90 Used for high-speed turning of heat resisting alloys ferrous metals and cast irons and highspeed milling of cast irons. Hardest T-CBN grade featuring high content of CBN sintered with cobalt based binder. Provided with high transverse rupture strength comparable with cemented carbides. BX850 AP&zt V; .s v 3300-3500 0.75-0.85 Used for turning of grey cast irons. Features moderate content of CBN sintered with special ceramic binder and excels in impact resistance.