2 Three types of specialized strengthening technology (Hybrid technology) 1. High quality surface finish High melting point “hybrid bonded phase” Combining the conventional cermet bonded phase (nickel, cobalt) and the special high melting point metallic bonded phase. Provides high adhesion resistance to eliminate galling of the work piece for excellent surface finish Specialized strengthening technology 1 High melting point hybrid bonded phase Conventional Bonded Phase 2. Excellent fracture resistance Micro grain “hybrid hard phase” 3. Superior wear resistance Special surface-hardened “hybrid structure” Improved strength with uniform micro grain hard phase and superior compressive stress with high melting point bonded phase. This combination yields greater fracture resistance. Excellent wear resistance with surface-hardened layer using gradient composition technology Good balance of stable wear resistance and fracture resistance. *No applicable to PV730. Specialized strengthening technology 2 Micro grain“hybrid hard phase” Specialized strengthening technology 3 Special surface-hardened hybrid structure TN620 structure Surface High wear resistance TN620 structure Inner Excellent chipping resistance and thermal shock resistance High Melting Point Metallic Bonded Phase Internal structure Compressive residual stress in hard phase comparison (Internal evaluation) High 20% Low TN620 Conventional micro grain cermet Hardness (%) 120 TN620 Conventional 100 0 0.1 0.2 0.3 0.4 Distance from the sintered body surface (mm) TN620’s inner structure has high toughness and chipping resistance along with greater thermal shock and wear resistance than that of the conventional micro grain cermet. (Internal evaluation) Beautiful surface finish (Internal evaluation) Surface roughness (ø4 ~ ø15) (Vc = 15 ~ 55 m/min) ø49 ø0 High speed Low speed Surface roughness (µm) Good finish PV720 10 5 0 -5 -10 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 Measured distance (mm) PV720 Surface roughness (µm) 10 The finished surface is clouded 5 0 Competitor A -5 -10 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 Measured distance (mm) Cutting Conditions: Vc = 180 ~ 0 m/min (Constant revolutions), ap = 0.5 mm f = 0.1 mm/rev, Wet, CNMG120404 type Workpiece: S10C Comp. A 2
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