History Of Casting

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CHAPTER-1

INTODUCTION

1.1 CASTING PROCESS

Definition :

Casting is one of the earliest metal shaping methods known to human beings. It generally means, pouring molten metal into a refractory mould with a cavity of the shape to be made, and allowing with it to solidify.

FIG 1.1 MOLTEN METAL POURING

1.2 History

The casting process was probably discovered around 3500 BC in Mesopotamia.
In many parts of the world during that period, copper axes and other flat object were made in open moulds made of stone or baked clay.
Casting technology was improved by the Chinese around 1500 BC.
It appears that iron casting technology in India has been in use from the times of the invasion of Alexander the Great, around 300BC.
1.3 Theory of Casting …show more content…

Usually Melting processes are done into the Furnace. In Furnace Raw material is converted into molten Metal.
1.6.5 Pouring
Pouring of Molten metal into mould with the help of Ladle. The pouring of the molten metal into the mould requires carefully control.

1.6.6 Solidification and cooling
After molten metal is poured into a mould, a series of events takes place during the solidification of the metal and its cooling to ambient temperature. The temperature of the molten metal is decrease with respect to the time.
1.6.7 Cleaning Cleaning refers to all operations necessary to the removal of sand, scale, and excess metal from the casting. The casting is separated from the mold and transported to the cleaning department. burned-on sand and scale are removed to improve the surface appearance of the casting. excess metal, in the form of fins, wires, parting line fins, and gates, is removed. Castings may be upgraded by welding or other procedures. inspection of the casting for defect and general quality is performed.

1.7Advantage of casting
1. Casting process is highly adaptable to the requirement of mass production.
2. Advantage over the forging process is

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