The saturated steam oxidation behavior of Super304 H at 650 ℃ was studied

of which the Super304 His shot peened and aluminized before the oxidation experiment.The high accuracy electronic balance was applied to measure the mass gain of samples

and the XRD and SEM were employed to analyze the oxide films.The results show that

the antioxidant capacity of the Super304 H without surface modification was poor

shot peening could improve the antioxidant capacity of the Super304 H

and the antioxidant capacity of the Super304 H was significantly improved after being aluminized.The outer oxide film of the Super304 H was formed by Fe2O3

the inner oxide film was Fe-Cr spinel

and the oxide film of the shot peened sample formed by Cr2O3 and a small amount of Mn-Fe spinel composition.However

the deformation twin layer degraded because of the growth and annexation of the adjacent sub-grain boundaries.The Al2O3 film formed on the surface of the aluminized sample

while Al content in diffusion zone remained unchanged.