Question

The hardest cutting tool material after the diamond is:

• A. Cubic Boron Nitride
• B. Tungsten Carbide
• C. Titanium Carbide
• D. Ceramics

Hint:

Cubic Boron Nitride (CBN) is ideal for high-precision cutting of ferrous materials.

Answer 1

The Correct Option is A

1. Hardness of Cutting Tool Materials:
The hardness of cutting tool materials is a key factor in their ability to withstand wear and maintain sharp cutting edges.
2. Why Cubic Boron Nitride:
Cubic Boron Nitride (CBN) is the hardest material after diamond. It is used in cutting tools for machining ferrous materials due to its hardness and heat resistance.
3. Other Materials:
Tungsten Carbide (Option 2) is one of the most widely used cutting tool materials but is not as hard as CBN.
Titanium Carbide (Option 3) and Ceramics (Option 4) are hard but not as hard as CBN.