TECHNIQUES OF METAL WORKING
Humans have practiced metal working for centuries, perfecting techniques depending on the type of metal being worked.
Presently, metal working can be divided into two main categories.
– Hot working
– Cold working
The terms “hot” and “cold” do not refer necessarily to the temperature with which the metals are worked, rather when the processing temperature of the mechanical deformation of the metal is above recrystallization temperature, it is considered a hot working. Otherwise, it is cold. If this relationship is lower than 0,3° it is considered “cold”, if it is greater than 0,6° it is considered “hot”. If it is between the two values, it is considered “lukewarm”.