High-corrosion-resistance high-carbon austenitic stainless steel for nuclear power and manufacturing method thereof

• Main Authors: HU HAIYANG, CHEN JIE, SUN DIANDONG, GAO TIANYU, YAN BINGYU, WANG SHUANG, WANG YONG, ZHANG HANNING
• Format: Patent
• Language: Chinese; English
• Published: 12.09.2023
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses high-corrosion-resistance high-carbon austenitic stainless steel for nuclear power and a manufacturing method of the high-corrosion-resistance high-carbon austenitic stainless steel. The steel comprises the following chemical components: 0.20-0.35% of C; 2.0% to 3.0% of Si; mn: 5.50% to 7.50%; less than or equal to 0.015% of P; s < = 0.005%; ni: 3.80%-4.50%; 16.75% to 18.25% of Cr; 0.75% to 1.00% of Co and 0.10% to 0.20% of Nb; and 0.05%-0.08% of Zr. The steel plate is matched with the processes of smelting, continuous casting, heating, rolling and heat treatment for production, so that the steel plate is ensured to have a relatively high comprehensive performance level, and the room-temperature yield strength (Rp0.2) and the tensile strength (Rm) respectively reach 530 MPa and 735 MPa or above; during high-temperature stretching at 550 DEG C, the yield strength (Rp0.2) and the tensile strength (Rm) respectively reach 325 MPa and 527 MPa or above; the impact energy reaches 150 J or abo