Preparation method for improved super austenitic stainless steel material

The invention discloses a preparation method for an improved super austenitic stainless steel material. The preparation method comprises the following steps: 1) checking whether the size and the surface smoothness of a keel test block mold are qualified or not; 2) tidily placing the keel test block mold on the ground; 3) putting Pepset resin sands into the keel test block mold, and after putting the Pepset resin sands at the root position of the keel test block, and tamping the Pepset resin sands by using a tool; (4) placing chromite sands with the thickness of 10-20 mm at the position of thekeel test block; (5) continuously putting the Pepset resin sands into the keel test block mold until the whole keel test block mold is filled with the Pepset resin sands, and then, tamping and strickling the keel test block mold by using a wooden stick; 6) naturally hardening the keel test block sand mold for 10-15 minutes, and taking out the keel test block mold; 7) pouring molten steel into thetest block and cooling the