New Method for Preparing Cubic Boron Nitride Hardened Layers

摘要: AbstractHardened layers 0.15 - 0.2 mm thick were prepared by a duplex treatment combining boronising at temperature of 900 ° C for 5 h and plasma immersion ion implantation with nitrogen ions an implanting energy 60 keV to dose 3×1017 atoms cm -2. 400°C on 50Mn steel (0.5C 0.8Mn, wt-%) substrates. Cubic boron nitride, hexagonal B2O3, FeB, Fe2B found in the hardened X-ray photoelectron spectroscopy diffraction. The amount c-BN phase dominates region from surface depth nm. friction properties hardness determined standard sphere disc sliding experiments room under unlubricated conditions Vickers microhardness different loads treated specimens alone boronising. results showed that had far greater (u...