-
In which of the choices given below, the cutting tool materials are placed in the ascending order of permissible cutting speed for machining of steel?
-
- K group cemented carbide - P group cemented carbide - Ceramic - Cubic boron nitride
- Cubic boron nitride - K group cemented carbide - Cubic boron nitride - Ceramic
- P group cemented carbide - K group cemented carbide - Cubic boron nitride - Ceramic
- Ceramic - Cubic boron nitride - K group cemented carbide - P group cemented carbide
Correct Option: A
K – Group having higher cobalt content to higher transverse rapture strength hence higher speed.
