Abstract: The present disclosure relates to a wear resistant steel material that is not cracked even after being cut using gas, etc., and a method of manufacturing the wear resistant steel material.

Abstract: The present invention provides wear-resistant steel which has high hardness while having wear resistance and high impact toughness at low temperature, and a manufacturing method therefor.

Abstract: The present disclosure relates to wear-resistant steel comprising, by weight, carbon (C): 0.19 to 0.28%, silicon (Si): 0.1 to 0.7%, manganese (Mn): 0.6 to 1.6%, phosphorus (P): 0.05% or less, sulfur (S): 0.02% or less, aluminum (Al): 0.07% or less, chromium (Cr): 0.01 to 0.5%, nickel (Ni): 0.01 to 3.0%, copper (Cu): 0.01 to 1.5%, molybdenum (Mo): 0.01 to 0.5%, boron (B): 50 ppm or less, and cobalt (Co): 0.02% or less, further comprising one or more selected from the group consisting of titanium (Ti): 0.02% or less, niobium (Nb): 0.05% or less, vanadium (V): 0.05% or less, and calcium (Ca): 2 to 100 ppm, and comprising a remainder of iron (Fe) and other unavoidable impurities, wherein C, Ni, and Cu satisfy the following relationship 1, wherein a microstructure includes 97 area % or more of martensite: C×Ni×Cu?0.05.??[Relationship 1] .

Abstract: The present invention relates to wear-resistant steel used in construction machines, among others, and more specifically, to high-hardness wear-resistant steel having excellent wear resistance to a thickness of 40 to 130 t (mm) as well as high strength and impact toughness, and to a method for manufacturing the high-hardness wear-resistant steel.

Abstract: A wear-resistant steel having excellent hardness and impact toughness and a method for producing same can include: 0.29-0.37 wt % of carbon, 0.1-0.7 wt % of silicon, 0.6-1.6 wt % of manganese, 0.05 wt % or less of phosphorus, 0.02 wt % or less of sulfur, 0.07 wt % or less of aluminum, 0.1-1.5 wt % of chromium, 0.01-0.8 wt % of molybdenum, 0.01-0.08 wt % of vanadium, 50 ppm or less of boron, and 0.02 wt % or less of cobalt; and optionally one or more of 0.5 wt % or less of nickel, 0.5 wt % or less of copper, 0.02 wt % or less of titanium, 0.05 wt % or less of niobium, and 2-100 ppm of calcium; with the remainder of Fe and other inevitable impurities.

Abstract: One aspect of the present invention aims to provide high-hardness wear-resistant steel having excellent wear resistance to a thickness of 40t (mm) as well as high strength and impact toughness, and a method for manufacturing same.

Abstract: The present invention provides a steel material, and a method of manufacturing the same. The steel material comprises, by weight %, 0.02 to 0.07% of carbon, 0.1 to 0.5% of silicon, 0.2 to 0.7% of manganese, 0.05% or less of phosphorus, 0.02% or less of sulfur, 0.07% or less of aluminum, 0.1 to 0.5% of chromium, 0.3 to 1.0% of molybdenum, 0.05% or less of vanadium, 50 ppm or less of boron, 0.01 to 0.5% of nickel, 0.5% or less of copper, 0.02% or less of titanium, 0.05% or less of niobium, and 2 to 100 ppm of calcium, and the balance of Fe and other unavoidable impurities, and satisfies relational expressions 1 and 2 mentioned below, wherein the microstructure thereof contains, by area %, 90% or more of martensite and 10% or less of bainite. 260?1589×[C]+228?340??[Relational Expression 1] [C]/[Mo]?0.

Abstract: One embodiment of the present disclosure provides an abrasion resistant steel having excellent hardness and impact toughness, and a manufacturing method therefor, the steel comprising, by wt %, 0.33-0.42% of C, 0.1-0.7% of Si, 0.6-1.6% of Mn, 0.05% or less of P, 0.02% or less of S, 0.07% or less of Al, 0.55-5.0% of Ni, 0.01-1.5% of Cu, 0.01-0.8% of Cr, 0.01-0.8% of Mo, 50 ppm or less of B, and 0.02% or less of Co, further comprising one or more selected from the group consisting of 0.02% or less of Ti, 0.05% or less of Nb, 0.05% or less of V and 2-100 ppm of Ca, and comprising the balance of Fe and other inevitable impurities, wherein C and Ni satisfy the following relation 1, and the microstructure comprises 95 area % or more of martensite and 5% or less of bainite (including 0%). [Relation 1] [C]×[Ni]?0.

Abstract: The present invention provides a high strength steel plate for a structure and a method of manufacturing same, wherein the high strength steel plate fora structure comprises, by weight %, 0.03% (inclusive) to 0.1% (exclusive) of C, 0.1% (inclusive) to 0.8% (exclusive) of Si, 0.3% (inclusive) to 1.5% (exclusive) of Mn, 0.5% (inclusive) to 1.5% (exclusive) of Cr, 0.1% (inclusive) to 0.5% (exclusive) of Cu, 0.01% (inclusive) to 0.08% (exclusive) of Al, 0.01% (inclusive) to 0.1% (exclusive) of Ti, 0.05% (inclusive) to 0.1% (exclusive) of Ni, 0.002% (inclusive) to 0.07% (exclusive) of Nb, 0.03% or less of P, 0.02% or less of S, and the balance of Fe and unavoidable impurities, and has a microstructure comprising, by area fraction, 20% or more of bainite, less than 80% of polygonal ferrite and acicular ferrite in total, and less than 10% of pearlite and MA as the other phases.

Abstract: An embodiment of the present invention provides wear-resistant steel having excellent hardness and impact toughness and a method for producing same, wherein the wear-resistant steel comprises: 0.29-0.37 wt % of carbon (C), 0.1-0.7 wt % of silicon (Si), 0.6-1.6 wt % of manganese (Mn), 0.05 wt % or less of phosphorus (P), 0.02 wt % or less of sulfur (S), 0.07 wt % or less of aluminum (Al), 0.1-1.5 wt % of chromium (Cr), 0.01-0.8 wt % of molybdenum (Mo), 0.01-0.08 wt % of vanadium (V), 50 ppm or less of boron (B), and 0.02 wt % or less of cobalt (Co); further comprises one or more selected from the group consisting of 0.5 wt % or less of nickel (Ni), 0.5 wt % or less of copper (Cu), 0.02 wt % or less of titanium (Ti), 0.05 wt % or less of niobium (Nb), and 2-100 ppm of calcium (Ca); and comprises the remainder of Fe and other inevitable impurities.

Abstract: The present disclosure relates to wear-resistant steel comprising, by weight, carbon (C): 0.19 to 0.28%, silicon (Si): 0.1 to 0.7%, manganese (Mn): 0.6 to 1.6%, phosphorus (P): 0.05% or less, sulfur (S): 0.02% or less, aluminum (Al): 0.07% or less, chromium (Cr): 0.01 to 0.5%, nickel (Ni): 0.01 to 3.0%, copper (Cu): 0.01 to 1.5%, molybdenum (Mo): 0.01 to 0.5%, boron (B): 50 ppm or less, and cobalt (Co): 0.02% or less, further comprising one or more selected from the group consisting of titanium (Ti): 0.02% or less, niobium (Nb): 0.05% or less, vanadium (V): 0.05% or less, and calcium (Ca): 2 to 100 ppm, and comprising a remainder of iron (Fe) and other unavoidable impurities, wherein C, Ni, and Cu satisfy the following relationship 1, wherein a microstructure includes 97 area % or more of martensite: C×Ni×Cu?0.05.

Abstract: The present invention relates to wear-resistant steel used in construction machines, among others, and more specifically, to high-hardness wear-resistant steel having excellent wear resistance to a thickness of 40 to 130t (mm) as well as high strength and impact toughness, and to a method for manufacturing the high-hardness wear-resistant steel.

Abstract: One aspect of the present invention aims to provide high-hardness wear-resistant steel having excellent wear resistance to a thickness of 40t (mm) as well as high strength and impact toughness, and a method for manufacturing same.

Abstract: A low-yield-ratio type high-strength steel includes 0.02-0.11 wt % of carbon (C), 0.1-0.5 wt % of silicon (Si), 1.5-2.5 wt % of manganese (Mn), 0.01-0.06 wt % of aluminum (Al), 0.1-0.6 wt % of nickel (Ni), 0.01-0.03 wt % of titanium (Ti), 0.005-0.08 wt % of niobium (Nb), 0.1-0.5 wt % of chromium (Cr), 0.01 wt % or less of phosphorus (P) (excluding 0 wt %), 0.01 wt % or less of sulfur (S) (excluding 0 wt %), 5-30 weight ppm of boron (B), 20-70 weight ppm of nitrogen (N), 50 weight ppm or less of calcium (Ca) (excluding 0 weight ppm), 5-50 weight ppm or less of tin (Sn) (excluding 0 weight ppm), and a remainder thereof, being iron (Fe), and other inevitable impurities.