Turning Aided Deep Cold Rolling - A Cost Effective Mechanical Surface Treatment Technique for Surface Hardness Enhancement

Prabhu, P R and Kulkarni, S M and Sharma , S S Turning Aided Deep Cold Rolling - A Cost Effective Mechanical Surface Treatment Technique for Surface Hardness Enhancement. In: 3rd International Conference On Recent Advances in Material Processing Technology (RAMPT’13), 7th to 9th January 2013, Kovilpatti, Tamilnadu, India.

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The present study is aimed at filling the gaps in scientific understanding of the deep cold rolling process, and also to aid and arrive at technological solutions for the surface modifications based on deep cold rolling of the commonly employed engineering material. In this study, the effect of various deep cold rolling process parameters on the surface hardness is evaluated. The process parameters considered for the study are, deep cold rolling force, ball diameter, initial roughness of the workpiece and number of tool passes. An optimization strategy based on desirability function approach together with response surface methodology (RSM) has been used to optimize deep cold rolling process of AISI 4140 steel. A regression model was developed to predict surface hardness using RSM with central composite design. It is found that rolling force and ball diameter were the significant factors on the surface hardness. The predicted surface hardness values and the subsequent verification experiments under the optimal conditions confirmed the validity of the predicted model. Using the optimal processing parameters, the surface hardness has been improved from 225 to 305.5HV, resulted in an increase in the near surface hardness by about 36%. The absolute average error between the experimental and predicted values at the optimal combination of parameter settings for surface hardness was calculated as 0.97%.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: turning, deep cold rolling, surface hardness, response surface methodology, mechanical surface treatment
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 13 Mar 2013 11:10
Last Modified: 13 Mar 2013 11:10
URI: http://eprints.manipal.edu/id/eprint/79020

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