Thermal and Metallurgical Modelling of Laser Transformation Hardened Steel Parts


Article Preview

When applying laser transformation hardening (LTH) on a steel part the aim is to harden a localized area, which results in high hardness value for a defined width and depth of the material. To assure the hardened zone and keep the maximum temperature of the surface below the melting point we have used a finite element model (FEM) to compute the solution for heat distributions and the phase transformation of the material during LTH. Modelling results were used to introduce safe operating regions for LTH with different processing conditions. A problem associated with some LTH applications is the necessity to overlap the hardening passes. The temperature distribution of this phenomenon was also modelled using FEM which truly assist in finding optimum overlapping and technological parameters.



Materials Science Forum (Volumes 537-538)

Edited by:

J. Gyulai and P.J. Szabó




R. Rowshan and M. K. Baán, "Thermal and Metallurgical Modelling of Laser Transformation Hardened Steel Parts", Materials Science Forum, Vols. 537-538, pp. 599-606, 2007

Online since:

February 2007




[1] P.A. Molian, M. Baldwin, J. Tribol. 208 (1986) 326-333.

[2] J.S. Selvan, K. Subramanian, A.K. Nath, J. Mater. Process. Technol. 91 (1999) 29-36.

[3] A. Roy, I. Manna, Mater. Sci. Eng. A 297 (2001) 85-93.

[4] J. C. Ion, Surface Engineering 2002 Vol. 18 No. 14-31.

[5] K. Sridhar, A.S. Khanna, Lasers in Surface Engineering, ASM inter. 69-119.

[6] SYSWELD 99, SYSWELD Reference Manual, 13-17, 121-123.