Study Of Gear Teeth Distortions Due To Heat Treatment
V. Khade, M.S.Ramgir
Index Terms: Gear Teeth, Distortion, Quenching, Heat Treatment, Defects
Abstract: The work aims to study the distortion occurred due to heat treatment on the Gear teeth. The paper studies, various causes of distortion, control techniques to eliminate distortion, which includes changes in design, selection of material, heat treatment process, mainly due to quenching that includes cooling rates, quenching mediums, fixtures. An experimental study and results conducted for the effects of the distortion on the Gear teeth and to reduce the distortion with certain changes design modification, resulting in shape & size changes, phase changes, changes in hardness, microstructure, and residual stresses. It is observed that adequate velocity of quench oil around the component to be heat treated ensures uniform & desired cooling rate as per heat treatment cycle. Modification in design of baffles achieved the adequate velocity and minimization of distortion. Also, Fixtures for holding finished parts or assemblies during heat treatment may be either support or restraint type to control dimensional relations during aging.
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