Journal Title : International Journal of Modern Trends in Engineering and Science

Author’s Name : K.Sriharrish, M.Karthikeyan

Volume 01 Issue o5   Year 2014

ISSN no:  2348-3121 

Page no: 1-7

Abstract Gears are used to transmit large amount of power in mechanical transmission system with compact layout. For this high loading they mostly prefer worm wheel because of its high torque capacity and strength. In this teeth fracture occurs due to the effect on metal of repeated cycle of stress called fatigue and due to improper hardness. Due to this improper hardness, fatigue occurs in the teeth end and hence it develops due to continuous heavy loading. Hence to rectify this, our investigation consists of visual examination, chemical composition analysis, hardness analysis, stress analysis, finite element analysis & cryogenic treatment on steel. The chemical design analysis results the gear is manufactured by En353. The hardness analysis shows the failure occur due to improper heat treatment. Cryogenic treatment is to increase the hardness of material.  Hence I concluded by this project that we can reduce the fracture of teeth by providing the cryogenic treatment to it and to increasing the hardness of teeth.

Keywords— Cryogenic treatment; Gear failure; En353 Steel


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