Engineering Materials : Wrought Iron
Definition
➨ Wrought iron is the purest form of iron , because c % is very less and impurities are very less
Manufacturing of Wrought Iron by Puddling Furnace
Puddling Furnace Figure :
Construction
➨ There is Large structure with Brick work and two hearth and it is also known as Reverbetory Furnace
➨ It is Called Reverbetory Because of the Fuel and pig iron both are Seperatly feed
➨ There are working doors for collecting slag and other impurity
➨ Puddling Door provided for visualization purpose
➨ Spongy Wrought Balls Comes from furnace which are 50 to 70 kg heavy in weight , which are pass throught Roller for making Sheet.
Process
➨ Adding Fuel : Hard Coke + Dolomite(Flux)➨ Adding Pig Iron : Molten pig iron from Blast Furnace to Hearth
➨ Remelting Pig Iron + Flux+Fuel +Refining = Wrought iron
Composition
| Element | % |
| Carbn(C) | 0.02 |
| Silicon(Si) | 0.12 |
| Sulpher(S) | 0.018 |
| Phosphorus(P) | 0.02 |
| Manganese(Mn) | 0.02 |
| Slag | 0.07 |
| Remaining | Iron |
Defects
➨ Two Types Of Defects Are Producing in a Wrought iron
1. Red Shortness
2. Cold Shortness
➨ Red Shortness in which can not be work in hot work
➨ Cold Shortness in which Wrought weak in cold condition
Application
➨ Ship building Construction
➨ Agricultural product manufacturing
➨ Oil and water pipe Manufacturing
➨ Manufacturing of various articles or furniture
➨ Use for producing Fastenerse
- Bolts
- Rivets
- Nuts
- Screw Etc..
➨ Manufacturing Of drawing wire and Rod's
➨ Manufacturing of chains and Hook's
➨ It can be raw material for steel manufacturing.
Properties
➨ As Wrought iron is not containing much amount of carbon, so it is a very soft and ductile material
➨ It can notbe hardened as % of Carbon is very low
➨ It is malleable and easily machined material
➨ It can be hot and cold work
➨ Forging can also be carried out on this metal