FERRITIC OXIDE DISPERSION STRENGTHENED ALLOY WITH ENHANCED ROOM TEMPERATURE AND HIGH TEMPERATURE STRENGTH AND MANUFACTURING METHOD THEREOF

摘要

The present invention relates to a ferritic oxide dispersion strengthened alloy having enhanced room temperature and high temperature strength, which includes 12-20 wt% of Cr, 0.1-0.5 wt% of Y_2O_3, 0.1-4 wt% of W, 0.5-2 wt% of Mo, 0.1-0.3 wt% of Ti, 0.02-0.3 wt% of Zr, and a remainder consisting of Fe, and a method of preparing the same. The ferritic oxide dispersion strengthened alloy according to the present invention includes 12-20 wt% of Cr, 0.1-0.5 wt% of Y_2O_3, 0.1-4 wt% of W, 0.5-2 wt% of Mo, 0.1-0.3 wt% of Ti, 0.02-0.3 wt% of Zr, and a remainder consisting of Fe. The sum of Ti and Zr in content is 0.5wt% or less. Accordingly, the ferritic oxide dispersion strengthened alloy has an excellent tensile property at the room temperature and the high temperature, especially at 700°C, so that the ferritic oxide dispersion strengthened alloy is available to power generation Ultra-critical steam generator parts (rotor, shaft, etc.) and a material for engine parts for aircraft (disc, nozzle, etc.). Further, it is expected that the ferritic oxide dispersion strengthened alloy is available to reactor core structural components (nuclear fuel cladding tubes, ducts, wires, such as end caps) of nuclear power systems, such as sodium-cooling fast reactors.