Ceramic grades for high speed and high efficiency machining Low cutting force ceramic insert with chipbreaker controls edge chipping. Cutting force comparison (In-house evaluation) Resultant force in radial direction 1,500 Resultant force in axial direction 800 Cutting force (N) Cutting force (N) 26 % 1,000 600 400 200 0 36 % DOWN 500 0 Rake angle +6.7° MFK Competitor H MFK Competitor I Cutting conditions: Vc = 600 m/min, fz = 0.1 – 0.25 mm/t, ae × ap = 62.5 × 2 mm, dry Workpiece: GG25, ø125, 1 insert KS6050 First recommendation for gray cast iron 1 KS6050 High wear resistance enables stable machining Reduces grain boundary phase that generates negative impact on the cutting performance. Conventional grade Less grain boundary phase Stable machining without chipping Mechanical and thermal property will be improved by controlling grain boundary phase. More grain boundary phase Unstable machining due to chipping The grain boundary phase contained a high proportion of glass, therefore its toughness will be weakened by cutting heat. Grain boundary phase Grain boundary phase Point 2 Sudden fracture prevention Crack propagation KS6050 has higher aspect ratio compared with conventional grade. Bridging Fracture resistance improvement Crack deflection L d Crack Aspect ratio = L/d Large aspect ratio Controls crack propagation CS7050 First recommendation for nodular cast iron • Wear resistance improvement due to high coating adhesion • Suitable for high speed cutting High wear resistant phase (TiC base) Special Al2O3 phase High adhesion phase (TiN base) Si3N4 substrate 3
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