Modeling the Temperature Distribution During Laser Hardening Process

Abstract

A novel mathematical model is developed to calculate the temperature distribution on the surface and bulk of a steel plate under the laser hardening process. The model starts with the basic heat equation then it is developed into a volumetric form and is connected to the various solid existing phases. The proposed model is based on three influencing parameters of the laser hardening process which are the velocity of the laser spot and irradiation time. The results are compared with the available experimental data reported in the literature. The volumetric model provides an assessment of temperature distribution in both the vertical and horizontal axis. Laser irradiation at sufficiently high fluence can be used to create a solid-state phase change on the surface. Primary calculations show that the temperature profile has a Gaussian distribution in horizontal x and y-axis and presents an exponentially decreasing in the horizontal and vertical depth directions.

Numerical simulation and experimental study on laser hardening process of the 42CrMo4 steel

“…[6][7][8] Many researchers focused on the experimental and numerical simulation of laser surface hardening process and the evaluation of fatigue life with a hardened layer. [9][10][11][12][13][14][15][16][17][18][19][20][21] Liverani et al 9 established the numerical model and investigated the influence of incident laser poser and scanning velocity on the hardened depth and residual stress state for medium carbon steel components. The analytical and numerical models have been provided for evaluation of the temperature distribution during laser surface hardening process.…”