Основной каталог Kyocera 2021 - 2022 - страница 13

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Hardness (%) Insert grades Insert grades Uncoated CERMET MEGACOAT NANO CERMET A TN610/TN620 PV710/PV720 Three attributes of the hybrid technology contributes to superior surface finish and machining stability. 1 Excellent surface finish • Combining the conventional cermet bonded phase (nickel, cobalt) Surface finish comparison Cutting conditions: Vc = 180 ~ 0 m/min (Constant rotational speed), and the special high melting point metallic bonded phase (In-house evaluation) ap = 0.5 mm, f = 0.1 mm/rev, wet, CNMG120404 type, workpiece: C10 • Provides high adhesion resistance to eliminate galling of the PV720 Competitor A workpiece Specialized strengthening technology High melting point Surface nishø 49ø0 “Hybrid bonded phase” High speed Conventional bonded phase Low speed Good Bad [µm] [µm] Surface roughness 10 10 (ø 4 ~ ø15) 5 5 0 0 -5 -5 High melting point metallic bonded phase (Vc = 15 ~ 55 m/min) -10 -1000.511.522.533.544.555.500.511.522.533.544.555.5 [mm] [mm] 2 Excellent fracture resistance Improved strength with uniform micro grain hard phase and superior compressive stress with high melting point bonded phase. This combina- tion yields greater fracture resistance. Specialized strengthening technology  Grain “hybrid hard phase” Compressive residual stress in hard phase (In-house evaluation) TN620 structure High 120 % Low Inner structure TN620 Conventional micro grain cermet R 3 Excellent wear resistance Specialized strengthening technologySpecial surface-hardened “hybrid structure” Surface TN620 structure Inner • Excellent fracture resistance with surface-hardened layer High wear resistance Chipping and thermal shock resistance using gradient composition technology • Continuously-varied hardness provides wear and fracture resistance 120 TN620 TN620’s inner structure has high toughness and chipping resistance along with thermal and greater wear resistance than that of the conventional micro grain cermet. (See right chart) Conventional S  (In-house evaluation) 100 0 0.1 0.2 0.3 0.4 Distance from sintered body surface (mm) A7