Experimental Design and Performance Analysis in Plasma Arc Surface Hardening

In this paper, the experimental design of using the Taguchi method is employed to optimize the processing parameters in the plasma arc surface hardening process. The processing parameters evaluated are arc current, scanning velocity and carbon content of steel. In addition, other significant effects such as the relation between processing parameters are also investigated. An orthogonal array, signal-to-noise (S/N) ratio and analysis of variance (ANOVA) are employed to investigate the effects of these processing parameters. Through this study, not only the hardened depth increased and surface roughness improved, but also the parameters that significantly affect the hardening performance are identified. Experimental results are provided to verify the effectiveness of this approach.




References:
[1] V.S. Kraposhin, A.V. Bobrov, and O.S. Gaponenko, "Surface hardening
of 9KhF steel by heating with a plasma gun," Metal Science and Heat
Treatment, vol. 31, no. 11, pp. 816-821, 1989.
[2] J. Ruiz, V. Lopez, and B.J. Fernandez, "Effect of surface laser treatment
on the microstructure and wear behaviour of grey iron," Materials and
Design, vol. 17, no. 5/6, pp. 267-273, 1996.
[3] J.S. Selvan, K. Subramaniam, and A.K. Nath, "Effect of laser surface
hardening on En18 (AISI 5135) steel," Journal of Material Processing
Technology, vol. 91, pp. 29-36, 1999.
[4] J.R. Hwang, and C.P. Fung, "Effect of electron beam surface hardening
on fatigue crack growth rate in AISI 4340 steel," Surface and Coatings
Technology, vol. 80, pp. 271-278, 1996.
[5] R.G. Song, K. Zhang, and G.N. Chen, "Electron beam surface treatment.
Part I: Surface hardening of AISI D3 tool steel," Vacuum, vol. 69, pp.
513-516, 2003.
[6] E. Bourithis, A. Tazedakis, and G. Papadimitriou, "A study on the surface
treatment of Calmax tool steel by a plasma transferred arc (PTA) process,"
Journal of Material Processing Technology, vol. 128, pp. 169-177, 2002.
[7] W. Luo, "The corrosion resistance of 0Cr19Ni9 stainless steel arc welding
jonts with and without arc surface melting," Materials Science and
Engineering A, vol. 345, pp. 1-7, 2003.
[8] J. Wang, K. Kusumoto, and K. Nezu, "Plasma arc cutting torch tracking
control," Science and Technology of Welding and Joining, vol. 6, no. 3,
pp. 154-158, 2001.
[9] C.X. Pan, Y.W. Chen, and A.T. Male, "Microstructural development in
plasma jet forming of sheet steels," Materials Science and Technology,
vol. 18, pp. 1151-1155, 2002.
[10] P.K. Chu, J.Y. Chen, L.P. Wang, and N. Huang, "Plasma surface
modification of biomaterials," Materials Science and Engineering, vol.
36, pp. 143-206, 2002.
[11] V.A. Linnik, A.K. Onegina, A.I. Andrev, K.K. Aldarkin, V.M. Sinaiskii,
and L.P. Grigorenko, "Surface hardening of steel by plasma hardening,"
Metalloyed Term Obrab Met., vol. 4, pp. 2-5, 1983.
[12] Z. Nitkiewicz, and L. Jeiorski, "Plasma heat treatment of steel:
Microstructures, properties and applications," Materials Science and
Engineering, vol. A140, pp. 474-478, 1991.
[13] S.S. Samotugin, "Plasma treatment of tool steels," Welding International,
vol. 12, no. 3, pp. 225-228, 1998.
[14] M. Yan, W.Z. Zhu, W. Luo, X.B. Zhang, B.C. Zhou, and X.B. Zhao,
"Effect of plasma arc scanning on the wear resistance of gray iron,"
Materials Letters, vol. 56, pp. 14-18, 2002.
[15] W.X. Pan, X. Meng, G. Li, Q.X. Fei, and C.K. Wu, "Feasibility of laminar
plasma jet hardening of cast iron surface," Surface and Coatings
Technology, vol. 197, pp. 345-350, 2005.
[16] P.J. Ross, Taguchi Techniques for Quality Engineering. New York:
McGraw-Hill, 1996.
[17] G. Taguchi, Introduction to Quality Engineering. Tokyo: Asian
Productivity Organization, 1986.
[18] J. Kopac, M. Bahor, and M. Sokovic, "Optimal machining parameters for
achieving the desired surface roughness in fine turning of cold pre-formed
steel workpiece," International Journal of Machine Tool and
Manufacture, vol. 42, pp. 707-716, 2002.
[19] S.H. Park, Robust Design and Analysis for Quality Engineering.
London: Chapman and Hall, 1996.