Question

Essential requirements of tool materials

Answer 1

Thanks for asking this informative question.
Generally tool material includes:
Ferrous Metals
Non-ferrous Metals
Non-metallic materials
Following are the essential requirements of tool material:
Hardness, hot hardness, and pressure resistance.
Bending strength and toughness.
Inner bonding strength.
Wear resistance,  oxidation resistance, small prosperity to diffusion and adhesion, abrasion resistance, edge strength.
Hope this will help you.

Answer 2

Considering that the question means to ask for the characteristics that are required for a cutting tool are - 

1. The material of the cutting tool should be a minimum of 30% - 50% harder than that of the work material that should be cut.

2. Should have high thermal conductivity and high resistance.

3. Should be very tough.

4. Should have less coefficient of friction.

5. The material of the cutting tools should be cheap, easily available, and easily fabricated.