Influence of deep cold rolling and low plasticity burnishing on surface hardness and surface roughness of AISI 4140 steel

Prabhu, P R and Kulkarni, S M and Sharma , S S (2012) Influence of deep cold rolling and low plasticity burnishing on surface hardness and surface roughness of AISI 4140 steel. In: International Conference on Mechanical and Industrial Engineering (ICMIE 2010, August 25-27, Singapore.

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Abstract

Deep cold rolling (DCR) and low plasticity burnishing (LPB) process are cold working processes, which easily produce a smooth and work-hardened surface by plastic deformation of surface irregularities. The present study focuses on the surface roughness and surface hardness aspects of AISI 4140 work material, using fractional factorial design of experiments. The assessment of the surface integrity aspects on work material was done, in order to identify the predominant factors amongst the selected parameters. They were then categorized in order of significance followed by setting the levels of the factors for minimizing surface roughness and/or maximizing surface hardness. In the present work, the influence of main process parameters (force, feed rate, number of tool passes/overruns, initial roughness of the work piece, ball material, ball diameter and lubricant used) on the surface roughness and the hardness of AISI 4140 steel were studied for both LPB and DCR process and the results are compared. It was observed that by using LPB process surface hardness has been improved by 167% and in DCR process surface hardness has been improved by 442%. It was also found that the force, ball diameter, number of tool passes and initial roughness of the workpiece are the most pronounced parameters, which has a significant effect on the work piece’s surface during deep cold rolling and low plasticity burnishing process.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Deep cold rolling, burnishing, surface roughness, surface hardness, design of experiments, AISI 4140 steel
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 14 Mar 2013 11:11
Last Modified: 14 Mar 2013 11:11
URI: http://eprints.manipal.edu/id/eprint/79044

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