Основной каталог Kyocera 2021 - 2022 - страница 13

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Insert grades Uncoated CERMET MEGACOAT NANO CERMET A TN610/TN620 PV710/PV720 Insert grades 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 finish ø 49 ø0 “Hybrid bonded phase” High speed Conventional bonded phase Low speed Good Bad [µm] [µm] 10 10 Surface roughness 5 5 (ø 4 ~ ø15) 0 0 -5 -5 (Vc = 15 ~ 55 m/min) -10 -10 High melting point metallic bonded phase 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 [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 Specialized strengthening technology Excellent wear resistance Special 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 120 resistance Hardness (%) 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