Основной каталог Kyocera 2021 - 2022 - страница 22

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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

ClassificationGradeColorAve. grain size (μm)Hardness of substrate (GPa)Transverse strength (MPa)Advantages and Applications
KBN510Black2281,000• Excellent wear resistance and crack resistance, non-coated CBN • Application: Finishingand continuous machiningof hardened die steel
KBN5251 and under251,250• Application: General purpose for hardened steel
Hard materialsKBN05M (MEGACOAT)0.5-1.5271000• Heat-resistant MEGACOAT on highly heat-resistant CBN substrate • Application: High speed finishingof hardened steel
KBN10M (MEGACOAT)Blackish red228,• Application: High speed finishing of hardened die steel
KBN25M (MEGACOAT)1 and under251,250• Heat-resistant MEGACOAT on micro-grain CBN with heat-resistant binder phase • Application: Stable machiningof hardened steel at high cuttingspeeds
Sintered steelKBN570Black2-4341350• High content CBN • Application: Processing of sintered steel (burr suppression)
KBN70M (MEGACOAT)Blackish red,• Heat-resistant MEGACOAT on CBN rich substrate • Application: Stable machiningof sintered steel (ferrous sintered alloys)
KBN475Black2391,400• Excellent wear resistance due to high CBN content and special binder • Application: High speed machiningofgraycast iron
Cast ironKBN60M (MEGACOAT)Blackish red0.5-6331,250• Heat-resistant MEGACOAT on CBN rich substrate with hard binder phase • Application: High speed finishingofgraycast iron
KBN900 (TiN COAT)Gold931630• TiN coated solid CBN • Application: Heavy duty, interrupted machining and finishing of hardened steel, hardened roll steel and cast iron

For KBN35M, see page A18.

MEGACOAT CBN

Properties of PVD coating Advantages of MEGACOAT

  • Longer tool life and high speed machining due to superior heat resistance

40 35 and hardness. TiCN

30 MEGACOAT Stability improvement through prevention of crater wear (oxidation,

TiAIN 25 TiN diffusional wear) 20

15 High thermal stability and surface smoothness provide excellent surface finish 10

4006008001,0001,2001,400
Oxidation onset temperature (°C)
LowOxidation resistanceHigh

Application map

Hard materials Sintered steel Cast iron

KBN05M KBN70M KBN475

KBN900 KBN25M KBN570 KBN10M

KBN65B KBN60M KBN35M

Finishing Medium Roughing Finishing Medium Roughing Finishing Medium Roughing

Continuous Light Interruption Heavy

interruption interruption Continuous Light interruption Interruption Continuous Light interruption Interruption