Technical Ceramics. Cemented Carbides. Composite Materials

Indexable faceted cutting inserts (IFCI) based on cubic boron nitride (cBN)


Cubic boron nitride (cBN) is often referred to as superhard material (SHM). Various cBN modifications were marketed in the former USSR under many brands Elbor-R, Heaxanite, Belbor, PTNB, Compozit-05, Kiborit, KP-3, Compozit- 7, etc.

Main advantages:

  • Resistance to impacts, as compared to ELBOR and HEXANITE materials.
  • Chemical inertness;
  • High thermal stability (up to1300 С);
  • Broad range of workpiece materials (with hardness 30 - 90 HRC);
  • Threading capability for hardened steels;
  • Capability of thread sizing and grinding in one step.


Cubic boron nitride cutting tools are optimal for machining of hardened steels; grey, high-strength and chilled cast irons, hard metals (WC-based VK grades) with over 15 % Co.

IFCIs are used in:

  • Machining of carbon and alloyed steels;
  • High-speed continuous or discontinuous turning or cast iron (K01-K20);
  • Prolonged high-speed machining of hardened steels (Н05-Н10).

VB11 IFCIs are used in:
  • Finishing and semi-finishing of refractory alloys (S01-S10).

Types of IFCIs:

  • Solid IFCIs offer multiple re-grinding capabilities for considerable extension of service life.
  • Two-layer IFCIs are used for complex turning conditions (turning under impact loads; turning of casting or forging skins). 
  • Brazed tipped IFCIs are the most affordable tool type, used for general turning operations.

Workpiece MaterialGardness, НВV, m/min
РLow-carbon steel (<0.3% С) and free-cutting steel120 - 150150 - 350-
РMedium- and high-carbon steel (>0.3% С)150 - 190140 - 300-
РAlloyed steel and tool steel (including hardened)< 450 (< 48 HRC)80 - 300-
КCast iron with spheroidal graphite 150 - 350150 - 350-
КGrey cast iron160 - 240800 - 1400-
SNi-based refractory alloys240 - 350-250 - 500
HHardened steel45 - 55 HRC120 - 300-
H55 - 65 HRC130 - 250-
HChilled and/or hardened cast iron400 - 500100 - 140-