Optimization of Surface Roughness Using RSM Techniques in Dry Turning of Hardened Steel

Prashant Jagdishchandra Bagga


Machining of hardened steel using multilayer coated carbide tools provides lot of opportunities in saving machining time as compared to traditional grinding processes.   In this paper, optimization of cutting parameters in hard turning of AISI D3 steel using multilayer coated carbide inserts under dry turning operations were done.  Several experiments were conducted using Response Surface Methodology with face centered design.  Analysis of Variance (ANOVA) was performed to find out the effect of machining parameters on surface roughness in hard turning.  Cutting speed, feed and depth of cut were selected as parameters to optimize surface roughness.  Effect of individual independent variables and their interaction plots were drawn to study the effect of input parameters on output parameter.  It was found that feed rate was most significant factor influencing the surface roughness in hard turning.  Quadratic model was proposed to predict surface roughness value.


Hard turning, Coated carbide tools, Response surface methodology, Surface Roughness

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