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  Scopus ID: 21100926589

Comparing CNC Turning of 2205 Duplex Stainless Steel Under Nano Minimum Quantity Lubrication Using a Novel Dual Textured Tool Versus an Untextured Tool to Improve Material Removal Rate and Surface Roughness

Jawahar Sivakumar and Murugaiyan Thiyagu

Abstract

Exploring the differences in cutting 2205 duplex stainless steel, this study compares new computer numerical control (CNC) techniques with tool inserts featuring both dual textures and no textures. Nano-minimum quantity Lubrication (nMQL) is employed to enhance material removal rate (MRR) and refine the surface finish. As part of contemporary eco-friendly manufacturing practices, surface texturing is applied to alter the cutting tool’s surface texture on the rake face. This innovative approach enhances the wettability of the cutting fluid at the cutting edge, thereby optimizing machining performance. Using a femtosecond laser technique, a novel dual-textured tool with square and linear groove texture patterns is engraved on the tool surface. The 2205 duplex stainless steel is turned using the Jobber XL CNC turner, comparing the MRR and workpiece quality between the use of dual-textured and untextured tool inserts. Each group in the study consists of 20 samples, bringing the total sample size to 40 participants across the two groups. The calculation of the sample size was based on a statistical power (G-power) of 80% and a significance level (alpha) set to 0.0027. The experimental results show an average surface roughness of 1.764 μm for dual. When turning 2205 duplex stainless steel rod, use 2.157 μm for untextured tools and 2.05 μm for textured tools. A better MRR of 17.126 cc/min is obtained when turning with dual-textured tools when compared to 14.193 cc/min with an untextured tool insert. In the CNC turning process with nMQL machining settings, the independent t-test findings show statistical significance. (2-tailed), with p = 0.0024 (p = 0.05) for surface roughness and p = 0.0074 (p < 0.05) for MRR values. Considering the limitations of the study, the proposed dual-textured tool insert exhibited a notable increase in MRR (17.12%) and a corresponding reduction in surface roughness (19.35%) when compared to the untextured carbide tool inserts.

Published on: October 27, 2023
doi: 10.17756/nwj.2023-s3-113
Citation: Sivakumar J, Thiyagu M. 2023. Comparing CNC Turning of 2205 Duplex Stainless Steel Under Nano Minimum Quantity Lubrication Using a Novel Dual Textured Tool Versus an Untextured Tool to Improve Material Removal Rate and Surface Roughness. NanoWorld J 9(S3): S619-S625.

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