HIGH MANGANESE STEEL SHEET HAVING EXCELLENT VIBRATION-PROOF PROPERTY, AND MANUFACTURING METHOD THEREFOR

• Main Authors: CHIN, Kwang-Geun, CHO, Won-Tae, KIM, Tai-Ho, KIM, Young-Ha, SONG, Tae-Jin
• Format: Patent
• Language: English; French; Korean
• Published: 29.06.2017
• 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 present invention relates to a high Mn steel sheet and a manufacturing method therefor, the steel sheet comprising, by wt%: 0-0.1% or less of C; 8-30% of Mn; 0.1% or less of P; 0.02% or less of S; 0.1% or less of N; 0-1.0% of Ti; and Fe and inevitable impurities, wherein a microstructure has epsilon martensite and austenite, and the average particle diameter of the martensite and the austenite is 2 μm or less. L'invention se rapporte à une tôle d'acier à haute teneur en Mn et à un procédé de fabrication s'y rapportant, la tôle d'acier comprenant, en % en poids : 0 à 0,1 % ou moins de C; 8 à 30 % de Mn; 0,1 % ou moins de P; 0,02 % ou moins de S; 0,1 % ou moins de N; 0 à 1,0 % de Ti; et du Fe et des impuretés inévitables, sa microstructure comprenant de la martensite epsilon et de l'austénite et le diamètre moyen des particules de la martensite et de l'austénite étant inférieur ou égal à 2 µm. 본 발명은 중량%로, C : 0~0.1%이하, Mn : 8~30%, P : 0.1%이하, S : 0.02%이하, N : 0.1%이하, Ti 0~1.0% 및 Fe와 불가피한 불순물을 포함하고, 미세조직은 입실론 마르텐사이트와 오스테나이트로 이루어지고, 마르텐사이트와 오스테나이트의 평균 입경이 2μm이하인 고Mn강판 및 그 제조방법에 관한 것이다.