Cr_2O_3 Film Formed by Surface Oxidation of Stainless Steel Irradiated by a Nd-YAG Pulsed Laser

摘要

Nd-YAG pulsed laser was applied to the rapid oxidation of stainless steel to form a Cr_2O_3 protective film. Different metal oxide formed by the irradiation of the Nd-YAG pulsed laser. Cr_2O_3 film can form on the stainless steel when the scan velocity was controlled correctly. Different metal oxide growth mechanisms of the laser oxidation and the annealing oxidation in the oven were discussed. The oxidation, reaction rate and the sequence of metal elements in stainless steel with oxygen under the laser irradiation were studied respectively. The lattice diffusion and short-circuit diffusion are the main mechanism of the annealing oxidation in the oven.