TOOL WITH WEAR-RESISTANT CUTTING EDGE MADE OF CUBIC BORON NITRIDE OR POLYCRYSTALLINE CUBIC BORON NITRIDE, A METHOD OF MANUFACTURING THE TOOL AND ITS USE

摘要

To improve the wear resistance properties of tools comprising cutting edges made of cubic boron nitride (CBN) or polycrystalline cubic boron nitride (PCBN), it is proposed to cover the CBN or PCBN part with a thick layer of 0.5 to 6 mum of one or more oxides of the metals zirconium and / or yttrium and / or magnesium and / or titanium and / or aluminum, preferably aluminum oxide. The wear-resistant layer is deposited from the gas phase reaching 800 ° C. For coating, the CVD pulsed plasma process is preferably used. The tools thus coated are particularly suitable for fine machining by removing shavings of hard iron and steel materials.