1. (MECHANICAL ENGINEERING DEPARTMENT) (MATERIAL SCIENCE AND METALLURGY)
BIRLA VISHVAKARMA MAHAVIDYALAYA
(MECHANICAL ENGINEERING DEPARTMENT)
WHITE CAST IRON
AND
GRAY CAST IRON
(MATERIAL SCIENCE AND METALLURGY)

2. UNDER THE GUIDANCE OF: PROF. S.P.JOSHI
PREPARED BY:
NAME
ENROLLMENT NO.
KISHAN PRAJAPATI
MEGH SHAH
VATS SHAH
PRERAK SHETH
UNDER THE GUIDANCE OF: PROF. S.P.JOSHI

3. CAST IRON
Cast Iron is generally defined as an alloy of Iron with 2 to 4.5% Carbon, and usually with more than 0.1% Silicon
The three main constituents are :
Iron
Carbon
Silicon
Cast iron containing more of these materials than steel.

4. TYPES OF CAST IRON: WHITE CAST IRON: CARBON PRESENT IN FORM OF CARBIDE
GREY CAST IRON : CARBON PRESENT IN FORM OF GRAPHITE
DUCTILE CAST IRON: CARBON PRESENT IN FORM OF NODULAR,SPHERIODAL GRAPHITE
MALLEABLE CAST IRON : GRAPHITE IN MODULE(KNOT/LUMP) FORM

5. WHITE CAST IRON

6. When the carbon present in the form of iron carbide (cementite), the cast iron obtained is known as white cast iron.
When the carbon content in the structure of white cast iron is less then 4.3%, it is called hypo eutectic cast iron, but if less than 4.3% it is called hyper eutectic cast iron.
White cast iron is obtained by controlling the chemical composition and cooling rate during solidification.

7. MICROSTRUCTURE OF WHITE CAST IRON:

8. PROPERTIES OF WHITE CAST IRON:
High Hardness.
Wear resistant and abrasion resistant.
High compressive strength of order of to
Poor machinability
Brittle

9. APPLICATIONS OF WHITE CAST IRON:
BALLS FOR BALL MILLING
Liners For Cement Mixers
Decorated furniture
Nozzles

10. GRAY CAST IRON

11. Iron-carbon alloys containing flakes of graphite embedded in steel matrix, which show a grey-blackish coloured fracture due to graphite’—the free foam of carbon, are called grey cast irons.
The strength of grey iron depends on
The strength of steel matrix and the size
Character of graphite flakes in it.
Low cost of production.

12. MICROSTRUCTURE OF GRAY CAST IRON:

13. PROPERTIES OF GRAY CAST IRON:
Low melting point: (1150°—1250°C)
Cast irons have excellent fluidity and take good mould-impressions easily.
High compressive strength.
High thermal conductivity, and have ability to withstand thermal shocks.
Good resistance to atmospheric corrosion due to high silicon and perhaps other factors, than mild steels.
High damping capacity -due to the graphite flakes, which breaks the continuity of the metallic matrix, and thus, vibrations are not allowed to transfer from one side of flake to other.

14. APPLICATIONS OF GRAY CAST IRON:
Decorative pattern
Pump Housings
Internal combustion engine
Disc brake
Grey Cast iron cookware

15. THANK YOU