Abstract
Heat treatment of machine components such as Annealing, normalizing, hardening, case hardening and other surface treatments have given better endurance to static and dynamic loads and stresses for many service applications. Most of the components are heat treated after machining once major dimensional controls are met. However, after heat treatment, it was observed the dimensional inaccuracies such as actual dimensions values, surface quality deterioration due to scale formation and material combinations with surrounding media at elevated temperatures attempts to recheck the errors and dimensional variations in the components. Machining after heat treatment also is necessary and is practiced and there arises problems of different chemistry and physical behavior of tool and material machining conditions. In order to know the effects of the heat treatment on machining, an attempt is made to study the variations in the process using design of experiment (DOE) approach taking surface roughness parameter as response.
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