ABRASION RESISTANT STEEL WITH EXCELLENT TOUGHNESS AND WELDABILITY

• Main Authors: CHOI, JONG-KYO, JANG, WOO-KIL, PARK, YOUNG-HWAN, LEE, HONG-JU
• Format: Patent
• Language: English; French; German
• Published: 06.04.2016
• 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 an abrasion resistant steel comprising 2.6-4.5 wt% of manganese (Mn), 0.05-1.0 wt% of silicon (Si), carbon (C) in an amount satisfying (6-Mn)/50 # C # (10-Mn)/50 by weight, and the balance of iron (Fe) and other inevitable impurities, wherein the Brinell hardness on a surface layer thereof is a value of 360-440. In addition, the present invention relates to an abrasion resistant steel further comprising one or more components selected from the group consisting of 0.1 wt% or less of niobium (Nb) (not including 0 wt%), 0.1 wt% or less of vanadium (V) (not including 0 wt%), 0.1 wt% or less of titanium (Ti) (not including 0 wt%), and 0.02 wt% or less of boron (B) (not including 0 wt%) to complement the performance thereof. Further, the present invention relates to an abrasion resistant steel, wherein the microstructure comprises 90 % or more of martensite, and the average packet size of martensite is 20 µm or less.