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What Happens When Metals Undergo Heat Treatment? - The Balance

When metal is heated and cooled, it can be shaped and hardened. Each technique for heating and cooling metal has its own purpose.

What Is Heat Treatment? Hardening, Tempering, Annealing ...

Heat treatment is the heating and cooling of metals to change their physical and mechanical properties, without letting it change its shape. Heat treatment could be said to be a method for strengthening materials but could also be used to alter some mechanical properties such as improving formability, machining, etc. The most common application is metallurgical but heat treatment can also be used in manufacture of glass, aluminum, steel and many more materials. This article describes various heat treatment processes like hardening, tempering, annealing, normalizing, carburization, and surface hardening.