Baowu Teye Aviation Research Technology Co., Ltd. has successfully applied for a patent titled "Preparation method of martensitic sulfur-containing free cutting stainless steel for aviation"
2024-01-26 13:54:33
On January 23, 2024, Baowu Teye Aviation Research Technology Co., Ltd. successfully applied for a patent titled "Preparation method of martensitic sulfur-containing free cutting stainless steel for aviation", with application publication number CN117431454A and application date of October 26, 2023.
The invention discloses a preparation method for aviation grade martensitic sulfur-containing free cutting stainless steel, which includes adding industrial pure iron, nickel plate, low-carbon chromium iron, and the steel grade return material to an electric furnace for melting, adjusting the steel composition to control the composition, according to weight percentage: C: 0.22~0.25%, Si: 0.10~0.25%, Mn: 1.10~1.20%, P: 0.10~0.13%, Cr: 12.50~13.50%, Ni: 1.65~1.90%; Insert sulfur powder sealed with a thin tube into the steel liquid, stir evenly, then add BaAlSi alloy for final deoxidation, and then pour it out of the furnace into an electric slag billet; Perform electroslag remelting on the electroslag billet, using an electroslag remelting slag system that includes 30-40 wt% CaF2 powder, 25-35 wt% Al2O3 powder, 20-30 wt% SiO2 powder, 3-7 wt% MgO powder, and 3-7 wt% metallic manganese particles; After the electroslag remelting of the ingot, it is sent to the forging hot working furnace for heating, and then forged. After forging, it is sent to the annealing furnace for annealing heat treatment to obtain martensitic sulfur-containing free cutting stainless steel for aviation. This preparation method can effectively control the content of sulfur and manganese elements, and improve the comprehensive yield of Y25Cr13Ni2.
