Основной каталог Kyocera 2016-2017 - страница 17

Hybrid Cermet Three attributes of the Hybrid Technology contributes to superior surface finish and machining stability A 　General use : TN620 / PV720 　High speed / Continuous : TN610 / PV710 Insert Grades Special Surface-Hardened “Hybrid Structure” Super micro-grain “hybrid hard phase” Excellent fracture resistance with the surface-hardened layer using the gradient composition technology. Improved strength by uniform super TN620 Structure Good balance of stable wear resistance and fracture resistance by continuously-varied hardness. micro-grain hard phase and superior TN620's inner structure has high toughness and chipping compressive stress by high melting point resistance as well as thermal shock resistance. And surface bonded phase. Fracture resistance improved. Surface structure Inner structure area has higher hardness and wear resistance compared to the Compressive residual stress High conventional super micro-grain cermet A. (see attached chart) in hard phase (MPa) 200％ Surface　 　 　TN620 Structure 　　 　Inner 100％ Hardness Surface structure Low TN620 Conventional super 120％ (high hardness cermet) micro-grain cermet B →High wear resistance (Internal evaluation) TN620 Inner structure (high toughness cermet) Fracture Resistance Comparison 100％ →Good chipping Conventional A resistance and thermal shock resistance 0.00 0.10 0.20 0.30 0.40 PV720 Distance from sintered body surface (mm) (Internal evaluation) Wear Resistance Comparison Competitor C 0.30 Competitor C Flank wear (mm) 0.25 Competitor D Competitor D Competitor E 0.20 0.15 PV720 Competitor E 0.10 0.05 0 500 1,000 1,500 2,000 2,500 3,000 3,500 0.00 0 10 20 30 40 50 60 70 Number of impacts Cutting time (min) Cutting Conditions Cutting Conditions S45C　Vc=250m/min ap=1.0mm SCM435　Vc=250m/min　ap=1.0 mm　 f=0.2mm/rev Wet　CNMG120408PQ (Internal evaluation) f=0.2mm/rev Wet　CNMG120408PQ (Internal evaluation) High melting point “hybrid bonded phase” Surface finish comparison φ49 → φ0 High speed Combining the conventional cermet bonded phase (nickel, Cutting Conditions Low speed Workpiece Material：S10C cobalt) and the special high melting point metallic bonded phase. Vc=180~0m/min (Constant late) ap=0.5mm f=0.1mm/rev Wet CNMG120404 type Improved adhesion resistance and better surface nish are 　 PV720 Competitor C Competitor D Competitor E realized by higher thermal resistance of the bonded phase. Conventional Surface Finish bonded phase 　 Surface Roughness Good Bad Good Bad Bad Good （φ4～φ15） ↓ (Vc=15~55m/min) High melting point (Internal evaluation) metallic bonded phase A7