What is Difference Between Hot Forging vs Cold Forging

Forging is done by providing compressive forces for metal shaping.

Forging Classification according to applied temperature:

  1. Hot Forging
  2. Warm Forging
  3. Cold Forging

Usually hard hammer and presses are used for deformation of metal and alloys for high strength parts. The mechanical properties of the metals and alloys are improves by forging where it refines its grain structure resulting in much tougher and stronger version.

Following is a comparison of cold and hot forging process.

What Is Cold Forging?

Generally cold forging is performed at room temperature, the metal or alloy is compressed with two dies until it retain the desired share.

Advantages of Cold forging technique:

  • Very little or no finishing work required
  • Cost effective.
  • High precision rate.
  • Economical and High production rates
  • Long die life

Disadvantages of Cold Forging:

  • Only simple shape in high volumes can be shaped
  • Not suitable for customized components
  • Low ductility
  • Residual stress occurs.

What Is Hot Forging Process?

Hot Forging Process is performed at extremely high temperature between 1000 Degree Celsius to 700 Degree Celsius. The required temperature is needed to avoid extra strain and hardening of the metal during the deformation process.

Advantages of Hot Forging:

  • High ductility
  • Highly Flexible,
  • Excellent surface quality

Disadvantages of Hot Forging:

  • Less precise dimensional tolerance.
  • Careful monitored cooling process to be performed
  • Risk of warpage
  • Risk of job piece and atmosphere reactions
  1. […] When it comes to press forging, the main forming factor is compression. Applications of press forging are numerous, as there are relatively no limits to the size of the product that can be created. It can also be done hot or cold. […]

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