- FERRITE-MARTENSITIC OXIDE DISPERSION STRENGTHENED STEEL WITH EXCELLENT CREEP RESISTANCE AND MANUFACTURING METHOD THEREOF

摘要

The present invention relates to a method of manufacturing a steel sheet comprising 0.02 to 0.2 wt% of carbon (C), 8 to 12 wt% of chromium (Cr), 0.1 to 0.5 wt% of yttria, 0.2 to 2 wt% of molybdenum (Mo) (Fe) in an amount of 0.01 to 1 wt%, vanadium (V) in an amount of 0.01 to 0.3 wt%, zirconium (Zr) in an amount of 0 to 0.3 wt%, and nickel (Ni) in an amount of 0 to 0.5 wt% To a ferrite-martensitic oxide-dispersed steel reinforced steel having improved high temperature creep resistance and a method for producing the same. The ferrite-martensitic oxide-dispersed steel reinforced steel is excellent in tensile strength and creep resistance at high temperature, especially at 700 ° C, and can be used as core structural parts (nuclear fuel cladding, duct, wire, It is expected that it can be usefully used as a material of an ultrashort pressure steam generator part (rotor, shaft, etc.) for thermal power generation, and further, it can be usefully used as a material of an engine part (disk, nozzle, etc.) for an aircraft.