Introduction to Heat Treatment

Heat treatment is an operation or combination of operations, involving heating and cooling of a metal or alloy in the solid state for the purpose of changing the properties of the metal. Heat treatment consists of three phases. (a) Heating of the metal. (b) Soaking of the heat into metal. (c) Cooling of the metal. Purpose of Heat Treatment The purpose of heat treatment is as follows: (a) To improve machinability. (b) To improve mechanical properties, e.g., tensile strength, ductility, hardness and shock resistance. (c) To relieve the stress induced…

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