Forging is a manufacturing process that dates back years, it originated in early 4000 BC making it the world’s oldest metalwork process.
There are various types of forging such as hot forging, cold forging, and even warm forging. The main forging process doesn’t change, it basically involves shaping a piece of metal into the desired shape, using a hammer or die, the temperature at which this procedure is carried out determines the type of forging.
Defects of Forging
When carrying out forging, if it is not done properly defects can appear, things such as a cold shut, scale pits, improper grain growth, surface cracking, and die shift. You can control the number of defects by careful consideration of work volume, and good design in the first instance.
Casting or Forging?
You may have heard of casting also in the forging world, the difference being that with casting you fully melt the metal and pour it in a cast and then mold in whereas with forging it is just heated and forced into the desired shape.
What’s the best steel to use?
Forged steel is usually stronger than steel that has been cast, due to the fact that the grain flow in the steel is altered. We would recommend choosing to forge over casting for its strength. The only slight downside is that forging can be more expensive than casting.
Stainless steel is usually the best steel to choose for forging, however, copper is also a good material to forge as it heats up easily and will stay malleable while it is forced into the shape required.