Microstructure Changes of Machined Surfaceson Austenitic 304 Stainless Steel

This paper presents a experiment to estimate the influences of cutting conditions in microstructure changes of machining austenitic 304 stainless steel, especially for wear insert. The wear insert were prefabricated with a width of 0.5 mm. And the forces, temperature distribution, RS, and microstructure changes were measured by force dynamometer, infrared thermal camera, X-ray diffraction, XRD, SEM, respectively. The results told that the different combinations of machining condition have a significant influence on machined surface microstructure changes. In addition to that, the ANOVA and AOMwere used to tell the different influences of cutting speed, feed rate, and wear insert.

Authors:

• Lin. Yan
• Wenyu. Yang
• Hongping. Jin
• Zhiguang Wang

Keywords:

• Microstructure Changes
• Wear width
• Stainless steel

References:

[1] S. Ghosh and V. Kain, "Microstructural changes in AISI 304L stainless
steel due to surface machining: effect on its susceptibility to chloride
stress corrosion cracking,"J Nuc. Mater., vol. 403, pp. 62-67, 2010.
[2] S. Ghosh and V. Kain, "Effect of surface machining and cold working on
the ambient temperature chloride stress corrosion cracking susceptibility
of AISI 304L stainless steel" Mater. Sci. Eng. A., vol. 527, pp 62-67,
2010.
[3] E.O.Ezugwu and K.A.Olajire, "Evaluation of machining performance of
martensitic stainless steel," Tribology Letters. Vol. 12, pp 183-187, 2002.
[4] D. Kurniawan, N. M.Yusof, and S. Sharif, "Hard machining of stainless
steel using wiper coated carbide: tool life and surface integrity" Mater.
Manufact. Process., vol. 25, pp 370-377, 2010.
[5] W. T. Chien and C. Y. Chou, "The predictive model for machinability of
304 stainless steel"J Mater. Process. Tech., vol. 118, pp 442-447, 2001.
[6] U. A. Dabade, S. S. Joshi, R.Balasubramaniam, and V. V. Bhanuprasad,
"Surface finish and integrity of machined surface on Al/SiCp
composites," J Mater. Process. Tech., vol. 193, pp 166-174, 2007.
[7] Y. Huang and S. Y. Liang, "Modelling of the cutting temperature
distribution under the tool flank wear effect," Proc. Instn Mech. Engrs
Part C: J. Mech. Eng. Sci., vol. 217, pp 1195-1208, 2003.
[8] W. Grzesik, "Experimental investigation of the cutting temperature when
turning with coated indexable inserts," Int. J. Mac. Tools Manufact., vol.
39, pp 355-369, 1999.
[9] D.Y. Jang, T. R. Watkins, K. J. Kozaczek, C. R. Hubbard, and O. B.
Cavin, "Surface residual stresses in machined austenitic stainless steel,"
Wear., vol. 194, pp 168-173, 1996.