Today I am going to tell you about difference between Forging vs Casting. Casting and forging are both industrial processes of metal forming
and shaping. Different process used in different conditions. The main
difference between casting and forging is that the metal is compulsory to heat
and convert into liquid stage in casting but in forging metal is converted into
desire shape by applying pressure with or without applying heat. If the metal
is preheated into forging it does not convert into liquid stage. But before
differentiate this both terms; you have to know about what is casting and what
is forging. So first I am going to tell you about these terms.
Forging vs Casting:
What is casting?
Casting is a process in which metal is heated until molten stage
and pour this liquid metal into a mold or cavity where it is allow solidifying.
This process converts the metal into desire shape. It is useful to make complex
structure. Most of the industrial structures parts are like lathe machine bed,
milling machine bed make big base of other machinery part, IC engine components
etc. are made by this process.
Advantages of Casting
- This process can form very large structure which is impossible to form by other process.
- It can make any complex and unsymmetrical structure.
- The structure formed by this process has high compressive strength.
- It can attain wide range of properties.
- This process can attain high accuracy.
What is forging?
On the other hand forging is the process of converting metal
into desire shape by applying pressure and with or without heat. When the metal
is heated before applying pressure the process is called hot forging. In forging
metal is heated before below critical temperature or below molten stage.
Rolling, pressing, Wire drawing etc. is various types of forging. All sheets, small
component, wire etc are formed by this process.
Advantages of Forging:
- It produces tougher product compare to other.
- The product made by forging has high impact or tensile strength.
Tabular form of Difference between Forging vs Casting
S. No.
|
Casting
|
Forging
|
1.
|
The metal is heated until it converts into molten stage. |
The metal is heated below recrystallization temperature. |
2.
|
The product produce by it have high compressive strength compare to forging. |
It has low compressive strength. |
3.
|
It has low fatigue strength. |
It has high fatigue strength. |
4.
|
Imperfection or directional defecates does not improve in casting. |
Directional defect are refined in forging. |
5.
|
It is less reliable or has low strength. |
It is high reliable. |
6.
|
It is costly sometime and has high lead time. |
It has low lead time and cheap compare to casting. |
7.
|
The product has low tensile strength. |
This produces high tensile strength. |
8.
|
It required a secondary finishing operation. |
It does not require a secondary operation. |
Today we have learned about difference between. Casting and
forging. If you have any query regarding this article, ask by commenting.