The Effect of Laser Surface Melting on the Microstructure and Mechanical Properties of Low Carbon Steel
The paper presents the results of microhardness and
microstructure of low carbon steel surface melted using carbon
dioxide laser with a wavelength of 10.6μm and a maximum output
power of 2000W. The processing parameters such as the laser power,
and the scanning rate were investigated in this study. After surface
melting two distinct regions formed corresponding to the melted zone
MZ, and the heat affected zone HAZ. The laser melted region
displayed a cellular fine structures while the HAZ displayed
martensite or bainite structure. At different processing parameters,
the original microstructure of this steel (Ferrite+Pearlite) has been
transformed to new phases of martensitic and bainitic structures. The
fine structure and the high microhardness are evidence of the high
cooling rates which follow the laser melting. The melting pool and
the transformed microstructure in the laser surface melted region of
carbon steel showed clear dependence on laser power and scanning
rate.
[1] M. S. Fernando de Lima, F.A. Golia, R. Riva, A. Mariado, E. Santo,
Laser surface re-melting and hardening of an automotive shaft using
high power laser, Mat. Res., 10 (9 (2007).
[2] A.S.C.M. Olivera, R.S.C. Paredes, F.P. Weber, R. Vilar, Microstructure
changes due to laser surface melting of AISI304 stainless steel, Mat.
Res. 4 (2) (2001).
[3] E. Kennedy, G. Byrne, D.N. Lulias, A review of the use of high power
diode laser in surface hardening, J. of Materials. Processing Technology,
155-156(2004) 1855- 1860.
[4] M. Kulka, A. Pertek, Microstructure and properties of borided 41Cr4
steel after laser surface modification by re-melting, Applied Surface
Science, 214 (2003) 278-288.
[5] P.P. Psyllaki, A. Grniari, D.J. Pantlis, parametric study on laser nitriding
of 1.5919 steel, J. of materials processing technology, 195 (2008) 299-
304.
[6] J. H. Abbaud, K.Y. Benyyounis, A.G. Olabi, M.S.J. Hashmi, Laser
surface treatment of iron based substrates for automotive applications, J.
of Materials Processing Technology, 182 (1-3) (2007).
[7] S.H. Aldajah, O.O. Ajayi, G.R. Fenske, Z.Xu, Effect of laser surface
modifications on tribological performance of 1080 carbon steel, J. of
Tribology, 127 (3) (2005) 596 -604.
[8] M.H. McCay, N.B. Dahatre, J.A. Hapkins, F.D. McCay, M.A,Riley, The
influence of metals and carbides during laser surface modifications of
low alloy steels, J. of Materials, 34 (23) (1999) 5789 - 5802.
[1] M. S. Fernando de Lima, F.A. Golia, R. Riva, A. Mariado, E. Santo,
Laser surface re-melting and hardening of an automotive shaft using
high power laser, Mat. Res., 10 (9 (2007).
[2] A.S.C.M. Olivera, R.S.C. Paredes, F.P. Weber, R. Vilar, Microstructure
changes due to laser surface melting of AISI304 stainless steel, Mat.
Res. 4 (2) (2001).
[3] E. Kennedy, G. Byrne, D.N. Lulias, A review of the use of high power
diode laser in surface hardening, J. of Materials. Processing Technology,
155-156(2004) 1855- 1860.
[4] M. Kulka, A. Pertek, Microstructure and properties of borided 41Cr4
steel after laser surface modification by re-melting, Applied Surface
Science, 214 (2003) 278-288.
[5] P.P. Psyllaki, A. Grniari, D.J. Pantlis, parametric study on laser nitriding
of 1.5919 steel, J. of materials processing technology, 195 (2008) 299-
304.
[6] J. H. Abbaud, K.Y. Benyyounis, A.G. Olabi, M.S.J. Hashmi, Laser
surface treatment of iron based substrates for automotive applications, J.
of Materials Processing Technology, 182 (1-3) (2007).
[7] S.H. Aldajah, O.O. Ajayi, G.R. Fenske, Z.Xu, Effect of laser surface
modifications on tribological performance of 1080 carbon steel, J. of
Tribology, 127 (3) (2005) 596 -604.
[8] M.H. McCay, N.B. Dahatre, J.A. Hapkins, F.D. McCay, M.A,Riley, The
influence of metals and carbides during laser surface modifications of
low alloy steels, J. of Materials, 34 (23) (1999) 5789 - 5802.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:57919", author = "Suleiman M. Elhamali and K. M. Etmimi and A. Usha", title = "The Effect of Laser Surface Melting on the Microstructure and Mechanical Properties of Low Carbon Steel", abstract = "The paper presents the results of microhardness and
microstructure of low carbon steel surface melted using carbon
dioxide laser with a wavelength of 10.6μm and a maximum output
power of 2000W. The processing parameters such as the laser power,
and the scanning rate were investigated in this study. After surface
melting two distinct regions formed corresponding to the melted zone
MZ, and the heat affected zone HAZ. The laser melted region
displayed a cellular fine structures while the HAZ displayed
martensite or bainite structure. At different processing parameters,
the original microstructure of this steel (Ferrite+Pearlite) has been
transformed to new phases of martensitic and bainitic structures. The
fine structure and the high microhardness are evidence of the high
cooling rates which follow the laser melting. The melting pool and
the transformed microstructure in the laser surface melted region of
carbon steel showed clear dependence on laser power and scanning
rate.", keywords = "Carbon steel, laser surface melting, microstructure,
microhardness.", volume = "7", number = "3", pages = "155-3", }