Question

Cast iron possessing which one of the following metallographic structures is best suited for damping capacity in engineering applications?
1. Excess cementite
2. Carbon in temper form
3. Silicon carbide in flake structure
4. Spheroidal form of graphite

Answer 1

Correct Answer - Option 4 : Spheroidal form of graphite

Concept:

Spheroidal form of graphite is best suited for damping capacity.

Manufacturing of Spheroidal form of graphite include following process

1. Desulphurisation

2. Nodulishing

3. Inculation

Application:

1. cylinder block and cylinder head

2. used in piston

3. used in furnace door

4. used in sheet metal dies

5. used in crank shaft

6. used in bearing blocks

7. used in metal working rolls