2. Further treatments
page 7
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Photo/film of pouring iron
Photo/film of pouring iron Photo/film of pouring iron Photo/film of pouring iron
Picture 2.1 Pouring molten iron into a steel furnace.
Why are metals treated further after casting?
Factors that determine the structure of metals are their composition and the casting process. These may not give the exact properties required so further treatments (mechanical or heat) are sometimes necessary. These treatments modify its microstructure and change its properties so that they are more suitable for its purpose.

In this unit, we will look at:

  1. Cold working
  2. Annealing
  3. Hot working
  4. Quenching
  5. Tempering
  6. Alloying
Question 2-1.
What feature of a metal is modified by mechanical or heat treatment?

Summary                   Close
  • the main lattice structure is determined at casting
  • steels are treated further once they have been cast to modify their properties