2 Combination of cermet and a CVD coating provides high speed machining for better productivity Newly developed unique cermet grade with thick CVD coating which is difficult to accomplish using conventional technology High speed machining and long tool life with superior wear and chipping resistance Thickened CVD coated cermet Improved wear resistance with thicker coating than PVD Al2O3 layer provides excellent crater wear resistance TiN layer Aluminum oxide layer High-performance α-Al2O3 layer TiCN layer Micro TiCN layer Newly developed unique cermet grade Specialized high-strength micro grain cermet including a high metal content binder phase High wear and fracture resistance Strong intra-coating adhesion Cermet base material CCX image Wear resistance Shows greater strength and wear resistance in a wide range of cutting speeds from general to high speed machining V-T diagram (Internal evaluation) * Tool life criterion (min): Edge wear amount 0.1 mm (Logarithmic chart) 800 Improved wear resistance 500 400 300 Cutting edge (Vc = 500 m/min : After machining 12.4 min) CCX Conventional PVD coated cermet A Cutting speed (m/min) CCX Conventional PVD coated cermet 100 1 10 100 Tool life / min* Cutting conditions : Vc = 300/400/500 m/min, ap = 0.5 mm, f = 0.2 mm/rev, wet CNMG120408 type Workpiece : 34CrMo4 Chipping resistance Great chipping resistance with specialized high-strength micro grain substrate and the compressive residual stress of a CVD coating layer Surface condition after the CVD coating (Internal evaluation) CCX CVD coated carbide No crack Cracks Strong compressive residual stress prevents cracks from occuring Chipping resistance comparison (Internal evaluation) CCX Improved chipping resistance Conventional PVD coated cermet B 0 1,000 2,000 3,000 4,000 Number of impacts Cutting conditions: Vc = 300 m/min, ap = 0.5 mm, f = 0.3 mm/rev, n = 3, wet CNMG120408 type, workpiece : C45 (with 4 slots) 2
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