Influence of Cutting Speed, Feed Rate and Bulk Texture on the Surface Finish of Nitrogen Alloyed Duplex Stainless Steels during Dry Turning

D. Philip Selvaraj, P. Chandramohan
DOI: 10.4236/eng.2010.26059                

Abstract

This paper presents the results of experimental work carried out in dry turning of cast duplex stainless steels (ASTM A 995 Grade4A and ASTM A 995 Grade5A) using TiC and TiCN coated cemented carbide cutting tools. The turning tests were conducted at five different cutting speeds (80, 100, 120, 140 and 160 m/min) and three different feed rates (0.04, 0.08 and 0.12 mm/rev) with a constant depth of cut (0.5 mm). The influence of cutting speed and feed rate on the machined surface roughness was investigated. Texture analysis (Bulk) was also carried out to study the impact of preferred orientation on the resulting surface roughness. The result reveals that the increasing cutting speed decreases the surface roughness till a particular point and then increases whereas; the surface roughness value decreases with the decreasing feed rate. Presence of alpha fiber (Bulk texture analysis) in the austenite phase of 4A work piece material leads to better surface finish. Among both the grades, surface finish of grade 4A is better than grade 5A work piece material.

Keywords

Surface Roughness, Duplex Stainless Steel, Dry Turning, Coated Carbide Tool

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	J. R. Davis, “ASM Specialty Handbook Stainless Steels,” 2nd Edition, ASM International, Ohio, 1996.
[2]	R. Venkata Rao, “Machinabilty Evaluation of Work Materials Using Graph Theory and Analytic Hierarchy Process Methods,” Manufacturing Technology, Vol. 28, No. 3-4, 2004, pp. 221-227.
[3]	I. Ciftci, “Machining of Austenitic Stainless Steels Using CVD Multi-Layer Coated Cemented Carbide Tools,” Tribology International, Vol. 39, No. 6, 2006, pp. 565-569.
[4]	I. Korkut, M. Kasap, I. Ciftci and U. Sekar, “Determination of Optimum Cutting Parameters during Machining of AISI 304 Austenitic Stainless Steel,” Materials & Design, Vol. 25, No. 4, 2004, pp. 303-305.
[5]	J. Paro, H. Hanninen and V. Kauppinen, “Tool Wear and Machinabilty of HIPed P/M and Conventional Cast Duplex Stainless Steels,” Wear, Vol. 249, No. 3-4, 2001, pp. 279-284.
[6]	T. Akasawa, H. Sakurai, M. Nakamura, T. Tanaka and K. Takano, “Effects of Free-Cutting Additives on the Machinabilty of Austenitic Stainless Steel,” Journal of Materials Processing Technology, Vol. 143-144, 2003, pp. 66-71.
[7]	S. Agrawal, A. K. Chakrabarti and A. B. Chattopadhyay, “A Study of the Machining of Cast Austenitic Stainless Steel with Carbide Tools,” Journal of Materials Processing Technology, Vol. 52, No. 2-4, 1995, pp. 610-620.
[8]	D. O’Sullivan and M. Cotterell, “Machinability of Austenitic Stainless Steel SS303,” Journal of Materials Processing Technology, Vol. 124, No. 1-2, 2002, pp. 153-159.
[9]	J. Paro, H. Hanninen and V. Kauppinen. “Tool Wear and Machinabilty of X5 Cr Mn N 18 8 Stainless Steels,” Journal of Materials Processing Technology, Vol. 119, No. 1-3, 2001, pp. 14-20.
[10]	M. Y. Noordin, V. C. Venkatesh and S. Sharif, “Dry Turning of Tempered Martensitic Stainless Tool Steel Using Coated Cermet and Coated Carbide Tools,” Journal of Materials Processing Technology, Vol. 185, No. 1-3, 2007, pp. 83-90.
[11]	S. Thamizhmanii and S. Hasan, “Measurement of Surface Roughness and Flank Wear on Hard Martensitic Stainless Steel by CBN and PCBN Cutting Tools,” Journal of Achievements in Materials and Manufacturing Engineering, Vol. 31, No. 2, 2008, pp. 415-421.
[12]	M. Anthony Xavior and M. Adithan, “Determining the Influence of Cutting Fluids on Tool Wear and Surface Roughness during Turning of AISI 304 Austenitic Stainless Steel,” Journal of Materials Processing Technology, Vol. 209, No. 2, 2009, pp. 900-909.
[13]	M. Kiran Kumar, I. Samajdar, N. Venkatramani, G. K. Dey, R. Tewari, D. Srivastava and S. Banerjee, “Explaining Absence of Texture Development in Cold Rolled Two-Phase Zr-2.5 wt% Nb Alloy,” Acta Materialia, Vol. 51, No. 3, 2003, pp. 625-624.
[14]	P. Chandramohan, S. S. Mohamed Nazirudeen and S. S. Ramakrishnan, “Studies on Production and Thermo Mechanical Treatment of 0.32% Nitrogen Alloyed Duplex Stainless Steel,” Journal of Materials Engineering and Performance, Vol. 17, No. 2, 2008, pp. 271-279.
[15]	F. Gauzzi, R. Montanari, G. Principi and M. E. Tata, “AISI 304 Steel: Anomalous Evolution of Martensitic Phase Following Heat Treatments at 400oC,” Materials Science and Engineering A, Vol. 438-440, 2006, pp. 202-206.
[16]	F. Gauzzi, R. Montanari, G. Principi, A. Perin and M. E. Tata, “Martensite Formation during Heat Treatments of AISI 304 Steel with Biphasic Structure,” Materials Science and Engineering A, Vol. 273-275, 1999, pp. 443-447.
[17]	N. Akdut, J. Foct and G. Gottstein, “Cold Rolling Texture Development of α/γ Duplex Stainless Steels,” Steel research, Vol. 67, No. 10, 1996, pp. 450-455.
[18]	J. B. Clark, R. K. Garrett, T. L. Jungling, R. A. Vandermeer and C. L. Vold, “Effect of Processing Variables on Texture and Texture Gradients in Tantalum,” Metallurgical and Materials Transactions A, Vol. 22, No. 9, 1991, pp. 2039-2048.