MARTENSITIC OXIDE DISPERSION STRENGTHENED ALLOY HAVING ENHANCED HIGH TEMPERATURE STRENGTH AND CREEP PROPERTY, AND METHOD OF FABRICATING SAME

摘要

The present invention relates to a martensitic oxide dispersion strengthened alloy having enhanced high temperature strength and an enhanced creep property, which includes 8-12wt% of Cr, 0.1-0.5wt% of Y_2O_3, 0.1-0.5wt% of C, 0.2-2 wt% of Mo, 0.01-0.3 wt% of Ti, 0.1-0.3 wt% of Zr, 05-0.2wt% of Ni, and a remainder consisting of Fe, and a method of preparing the same. The martensitic oxide dispersion strengthened alloy according to the present invention includes 8-12wt% of Cr, 0.1-0.5wt% of Y_2O_3, 0.1-0.5wt% of C, 0.2-2 wt% of Mo, 0.01-0.3 wt% of Ti, 0.1-0.3 wt% of Zr, 05-0.2wt% of Ni, and a remainder consisting of Fe. The total contents of Ti Zr, and Ni is 0.5wt% or less. The martensitic oxide dispersion strengthened alloy has excellent strength and an excellent creep property at a high temperature, especially at 700°C, so that the martensitic oxide dispersion strengthened alloy is available to reactor core structural components including nuclear fuel cladding tubes, wires, end caps, and ducts of nuclear power systems, such as sodium-cooling fast reactors.;COPYRIGHT KIPO 2014