HIGH-STRENGTH AUSTENITIC STAINLESS STEEL AND MANUFACTURING METHOD THEREOF

• Main Authors: CHU, Nayeon, NOH, Hanseop, LEE, Jaehwa
• Format: Patent
• Language: English; French; Korean
• Published: 20.06.2024
• 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

A high-strength austenitic stainless steel according to an embodiment comprises 0.05% to 0.1% of C, 0.1% to 1.0% of Si, 1.0% to 5.0% of Mn, less than 0.05% of P, less than 0.03% of S, 14.0% to 18.0% of Cr, 1.0% to 5.0% of Ni, 0.1% to 2.0% of Cu, 0.1% to 0.2% of N, and the balance being Fe and inevitable impurities, and may have a diameter deviation of 2 or smaller between crystal grains in the thickness direction. Un acier inoxydable austénitique à haute résistance selon un mode de réalisation comprend de 0,05 % à 0,1 % de C, de 0,1 % à 1,0 % de Si, de 1,0 % à 5,0 % de Mn, moins de 0,05 % de P, moins de 0,03 % de S, de 14,0 % à 18,0 % de Cr, de 1,0 % à 5,0 % de Ni, de 0,1 % à 2,0 % de Cu, de 0,1 % à 0,2 % de N, le reste étant du Fe et des impuretés inévitables, et peut avoir un écart de diamètre de 2 ou moins entre des grains cristallins dans le sens de l'épaisseur. 일 실시예에 따른 고강도 오스테나이트계 스테인리스강은, C: 0.05% 이상 0.1% 이하, Si: 0.1% 이상 1.0% 이하, Mn: 1.0% 이상 5.0% 이하, P: 0.05% 미만, S: 0.03% 미만, Cr: 14.0% 이상 18.0% 이하, Ni: 1.0% 이상 5.0% 이하, Cu: 0.1% 이상 2.0% 이하, N: 0.1% 이상 0.2% 이하, 나머지 Fe 및 불가피한 불순물을 포함하고, 두께 방향의 결정립간 직경 편차가 2 이하일 수 있다.