A CASE STUDY ON RESPONSE OF ALLOY GEAR STEELS TO CASE CARBURIZING AND IT’S EFFECT ON WEIGHT OPTIMIZATION OF A TRANSMISSION SYSTEM
Journal Title: International Journal of Mechanical and Production Engineering Research and Development (IJMPERD ) - Year 2017, Vol 7, Issue 2
Abstract
The strength of a material is a very crucial design parameter from an engineer’s standpoint for designing a mechanical system with a primary design objective of optimization or minimization of system weight. This is particularly true for designing a transmission system for an automobile as a reduction in weight of the vehicle has a direct and significant impact on fuel consumption and the overall dynamic performance in terms of acceleration and maneuverability. Selection of a gear material is done primarily on the basis of strength. The gears are further heat treated after manufacturing to improve surface hardness and consequently the pitting strength. However, the effect of surface heat treatment on the strength of the material is not considered. Because of this, the system is prone to be significantly overdesigned. In this paper, a case has been presented, in which the augmentation in material strength due to case carburizing has been discussed, and based on the results, a suitable material was selected. Furthermore, the resulting savings in design weight has been discussed in detail. By following this approach 50.37% reduction in system design weight was achieved. This optimization was achieved because of improvement in material yield strength by 107.23% and 108.08% in ultimate tensile strength.
Authors and Affiliations
PRASAD SAKAT, ADWAIT VERULKAR, DARSHAN BAMB, SANTOSH JOSHI
Keywords
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