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.
- 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.
VB07 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 Material||Gardness, НВ||V, m/min|
|Low-carbon steel (<0.3% С) and free-cutting steel||120 - 150||150 - 350||-|
|Medium- and high-carbon steel (>0.3% С)||150 - 190||140 - 300||-|
|Alloyed steel and tool steel (including hardened)||< 450 (< 48 HRC)||80 - 300||-|
|Cast iron with spheroidal graphite||150 - 350||150 - 350||-|
|Grey cast iron||160 - 240||800 - 1400||-|
|Ni-based refractory alloys||240 - 350||-||250 - 500|
|Hardened steel||45 - 55 HRC||120 - 300||-|
|55 - 65 HRC||130 - 250||-|
|Chilled and/or hardened cast iron||400 - 500||100 - 140||-|