Основной каталог Kyocera 2021 - 2022 - страница 22

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Insert grades Hardness (GPa)HighCutting speedLo w HighCutting speedLo w HighCutting speedLo w Insert grades A CBN (Cubic boron nitride) CBN CBN (Cubic Boron Nitride) is second only to diamond in hardness, and is a synthetically produced material with high thermal conductivity. Features • Superior wear resistance when machining hard materials • Suitable for high speed machining of hard materials, sintered steel and cast iron • High thermal conductivity provides stable machining Features of CBN Classification Grade Color Ave. grain size Hardness of Transverse(μm)substrate (GPa)strength (MPa) Advantages and Applications KBN510 2 28 1,000 • Excellent wear resistance and crack resistance, non-coated CBN• Application: Finishing and continuous machining of hardened die steel Black KBN525 1 and under 25 1,250 • Application: General purpose for hardened steel Hard materials KBN05M(MEGACOAT) 0.5-1.5 27 • Heat-resistant MEGACOAT on highly heat-resistant CBN substrate• Application: High speed finishing of hardened steel 1,000 KBN10M Blackish red 2 28 • Application: High speed finishing of hardened die steel (MEGACOAT) KBN25M(MEGACOAT) 1 and under 25 1,250 • Heat-resistant MEGACOAT on micro-grain CBN with heat-resistant binder phase• Application: Stable machining of hardened steel at high cutting speeds KBN570 Black • High content CBN• Application: Processing of sintered steel (burr suppression) Sintered steel 2-4 34 1,350 KBN70M Blackish red(MEGACOAT) • Heat-resistant MEGACOAT on CBN rich substrate• Application: Stable machining of sintered steel (ferrous sintered alloys) KBN475 Black 2 39 1,400 • Excellent wear resistance due to high CBN content and special binder• Application: High speed machining of gray cast iron Cast iron KBN60M Blackish red 0.5-6(MEGACOAT) 33 1,250 • Heat-resistant MEGACOAT on CBN rich substrate with hard binder phase• Application: High speed finishing of gray cast iron • TiN coated solid CBN KBN900 Gold 9 31 630 • Application: Heavy duty, interrupted machining and finishing of hardened steel, hardened roll steel and (TiN COAT) cast iron For KBN35M, see page A18. MEGACOAT CBN Properties of PVD coating Advantages of MEGACOAT 40 • Longer tool life and high speed machining due to superior heat resistance 35 and hardness. 30 TiCN 25 TiAIN MEGACOAT • Stability improvement through prevention of crater wear (oxidation, 20 TiN diffusional wear) 15 • High thermal stability and surface smoothness provide excellent surface finish 10 400 600 800 1,000 1,200 1,400 Oxidation onset temperature (°C) Low Oxidation resistance High Application map Hard materials Sintered steel Cast iron KBN05M KBN70M KBN475 KBN900 KBN25M KBN570 KBN10M KBN35M KBN65B KBN60M Finishing Medium Roughing Finishing Medium Roughing Finishing Medium Roughing Continuous LightinterruptionInterruption Heavyinterruption Continuous Light interruption Interruption Continuous Light interruption Interruption A16