HIGH MANGANESE STEEL HAVING EXCELLENT OXYGEN CUTTING PROPERTIES, AND MANUFACTURING METHOD THEREFOR

• Main Authors: CHO, Won-Tae, JUNG, Young-Deok, LEE, Soon-Gi, CHOI, Chang-Sik, LEE, Dong-Ho, KANG, Sang-Deok, KIM, Bo-Sung, LEE, Un-Hae, SEOK, Jeong-Hun
• Format: Patent
• Language: English; French; German
• Published: 01.09.2021
• 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 high manganese steel having excellent oxygen cutting properties, according to one aspect of the present invention, comprises 0.1-0.5 wt% of carbon (C), 20-26 wt% of manganese (Mn), 0.05-0.4 wt% of silicon (Si), at most 2.0 wt% of aluminum (Al), and at most 4 wt% of chromium (Cr), with the remainder being Fe and other unavoidable impurities, and has a cutting sensitivity (Sc), calculated according to [relational expression 1] below, of at least 430 and may comprise at least 95 area% of austenite as a microstructure. [Relational expression 1] Cutting sensitivity (Sc) = 1742 - 662*[C] - 19.2*[Mn] + 1.6*[Al] - 140*[Cr] (In [relational expression 1], [C], [Mn], [Al], and [Cr] represent the respective percentages by weight of C, Mn, Al, and Cr included in the steel and, if the elements concerned are not included, represent 0.)