The invention belongs to the field of
nuclear fuel manufacturing, and particularly relates to a chromizing
nitriding surface treatment technology for
austenitic stainless steel, which comprises the following steps: burying a workpiece into a chromizing agent, filling the workpiece and the chromizing agent into a chromizing tank, putting the chromizing tank into a chromizing furnace for chromizing heat treatment, putting the workpiece into a high-pressure vacuum
gas quenching furnace, and converting a chromizing layer into a chromizing and
nitriding composite layer, wherein the chromizing agent comprises
chromium powder, a filling agent and a catalyst, and chromizing heat treatment comprises chromizing
powder pretreatment, loading and packaging and then heat treatment; the
nitriding treatment comprises cleaning and
drying a sample, the workpiece and a nitriding furnace, and then carrying out nitriding heat treatment on the nitriding furnace. By means of the formula of the chromizing agent, the hardening phenomenon is avoided, damage to the workpiece is not likely to be caused, the relation between the chromizing heat preservation
time factor and the chromizing
layer thickness is designed, the chromizing
layer thickness is controlled, workpiece deformation is reduced, the
solid solution nitriding technology can meet the nitriding requirement, and the
adverse effect on the material performance in the
powder chromizing process is eliminated.