 The study investigated the differences between two types of laser beam, super Gaussian beam, SGB, and Gaussian beam, GB. The results showed that the peak temperature and liquid velocity in the molten pool under the SGB case were lower than those for the GB case. Additionally, the cooling rate was higher for the SGB case, suggesting that the grain size could be finer compared with that for the GB case. Furthermore, the reliability of the numerical simulation was verified by comparing the computed and experimental clad geometry. This article was authored by Bo Chen, Yan Huabyan, Jian Li, and others.