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

For the improvement of the wear properties of tools with cutting edge of cubic boron nitride (CBN) or polycrystalline cubic boron nitride (PCBN) it is proposed to coat the CBN or PCBN body with a 0.5 to 6 m thick layer 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 coating is deposited from the gas phase at gas-phase temperatures up to 800 C. Preferably for the coating the pulse- plasma CVD process is used. The so-coated tools are particularly suitable for the chip-forming precision machining of hard iron and hard steel materials.