α-SiAlONs cutting tool development, characterization and application in machining of compacted cast iron

Abstract

Recently, scientific and technological development, allowed new materials appearance aiming at to applications in several fields of the engineering, with the agreement between development and environment. Due of this condition, compacted cast iron is detaching in the production of motor blocks to diesel, being limited for its machinability. Therefore, this work had as objective to produze, to characterize and to apply SiAlONs cutting tools in machining of this material. A powder mixture constituted by 82.86 wt % α-Si3N4, 10.63 wt % A1N and 6.51 wt % Y2O3 was homogenized, uniaxially and cold isostatically pressed, and sintered at 1900°C for 1h. After chacterization, cutting tools were submitted at the different machining conditions: Vc = 200, 350 and 500m/min, f = 0.20 mm/rot and ap = 0.50 mm. Properties obtained in SiAlONs cutting tools together with machining conditions showed higher performance to the found in literature.