Numerical simulation of laser transformation hardening of ductile cast iron QT600-3

A 3-D numerical model of the temperature field for the laser transformation hardening was created based on finite element software ProCAST. The temperature field of the laser transformation hardening of ductile cast iron QT600-3 was calculated. According to the temperature field, the depths and widths of the hardened band were predicted. When the laser power ranged from 800 W to 1 000 W, the scan velocity ranged from 2.000 mm/s to 2.667 mm/s, and the diameter of laser beam ranged from 4 mm to 5 mm, The depths of the hardened distribute between 0.20 mm and 0.64 mm as well as the widths distribute between 2.0 mm and 3.7 mm. The depths and widths of the hardened band rises with increase in laser power or decrease in laser scanning velocity. It was found that the numerical simulated results wa