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  Scopus ID: 21100926589

Comparing CNC Turning of S32750 Super Duplex Stainless Steel under nMQL Machining Condition by Novel Dual Textured Tool with Untextured Tool for Improving Tool Flank Wear

Bakthavachalam P, Thiyagu M

Abstract

To compare innovative dual-textured and untextured carbide tool inserts in the context of CNC turning operations using S32750 super duplex stainless steel (SDSS) under nano-minimum amount lubrication to decrease flank wear. A modern, contemporary green manufacturing technique called surface texturing is utilised to alter the surface topography of the cutting tool at the rake face, improving the wettability of cutting fluid at the cutting edge. The tool surface is textured with square and linear groove patterns using a femtosecond laser technique. Addressing flank wear, a Jobber XL CNC turner used to turn S32750 super duplex stainless steel employed dual-textured tool inserts compared with untextured tool inserts. The investigation was carried out with the division of participants into two distinct groups, namely the control group, comprising samples subjected to machining with untextured tool inserts, and the experimental group, encompassing samples subjected to machining with novel dual-textured inserts. Each group consisted of 20 samples, resulting in a cumulative sample size of 40. The determination of the sample size was based on a statistical power of 80% and a significance level (alpha) of 0.05, employing G Power analysis. The experimental results show a mean flank wear of 0.298 mm for the experimental group samples and 0.239 mm for the control group samples in turning S32750 super duplex stainless steel rod. The obtained p value (2-tailed) of 0.001 (p < 0.05) from the independent sample t-test results in the CNC turning process with nano MQL machining conditions is statistically significant. Within the limitations of the investigation, the suggested dual-textured tool insert turned samples exhibit less flank wear than the untextured tool insert turned samples (18.26%). The process is statistically significant, as evidenced by the obtained p value of 0.001.

Published on: November 03, 2023
doi: 10.17756/nwj.2023-s3-178
Citation: Bakthavachalam P, Thiyagu M. 2023. Comparing CNC Turning of S32750 Super Duplex Stainless Steel under nMQL Machining Condition by Novel Dual Textured Tool with Untextured Tool for Improving Tool Flank Wear. NanoWorld J 9(S3): S1012-S1017.

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