Abstract: A method for manufacturing a grain-oriented electrical steel sheet, according to one embodiment of the present invention, comprises the steps of: hot rolling a slab so as to manufacture a hot rolled sheet, the slab comprising, by wt %, 2.5-4.0% of Si, 0.03-0.09% of C, 0.015-0.040% of Al, 0.04-0.15% of Mn, 0.01% or less of S (excluding 0%), 0.002-0.012% of N, 0.01-0.05% of Sb, 0.03-0.1% of Sn, 0.05-0.2% of Cr and the balance of Fe and inevitable impurities; cold rolling the hot rolled sheet so as to manufacture a cold rolled sheet; and performing secondary recrystallization annealing on the steel sheet having undergone primary recrystallization annealing.

Abstract: Provided are a steel plate for a pressure vessel with excellent cryogenic toughness and excellent ductility, and a manufacturing method thereof. The steel plate for a pressure vessel of the present invention comprises, in weight %, 0.05 to 0.15% of C; 0.20 to 0.40% of Si; 0.3 to 0.6% of Mn; 0.001 to 0.05% of Al; 0.012% or less of P; 0.015% or less of S; 4.0 to 5.0% of Ni; 0.001 to 0.10% of In; and the balance being Fe and unavoidable impurities, wherein a steel microstructure consists of 15 to 80 area % of tempered bainite and the balance being tempered martensite.

Abstract: Provided is a method of recovery lithium ion, including adding a residue after leaching lithium from an ore containing spodumene into a solution in which a lithium ion is dissolved; absorbing a lithium ion into the residue by reacting the solution containing the residue at 50-90° C.; and recovering a cake containing a lithium from the residue in which the lithium ion has been absorbed by performing solid-liquid separation.

Abstract: A double oriented electrical steel sheet according to an exemplary embodiment of the present disclosure contains, in wt %, at least 2.0% of Si, more than 0% and 0.02% or less of AI, 0.02-0.50% of Mn, more than 0% and 0.004% or less of C, and 0.0005-0.005% of S, with the remainder comprising Fe and inevitable impurities, wherein the area percentage of grains having a grain size of 2000 ?m or less is 25% or less.

Abstract: An insulating coating composition for an electrical steel sheet, according to an embodiment of the present invention, comprises, on the basis of 100 wt % of a total composition: 10 to 50 wt % of a first composition including first inorganic material particles and second inorganic material particles; 10 to 50 wt % of a second composition including a metal phosphate; and 20 to 60 wt % of an organic/inorganic composite in which inorganic nano particles are substituted in an organic resin.

Abstract: The present embodiment relates to an anode active material precursor, an anode active material, and a method for manufacturing same. An anode active material precursor according to an embodiment comprises: a carbon-based material comprising a metal compound; and a petroleum-based pitch, wherein the petroleum-based pitch comprises, on the basis of 10 parts by weight of the carbon-based material, 3 to 10 parts by weight, the softening point of the petroleum-based pitch may be 220-280° C., and the content of the metal compound may be greater than or equal to 10 ppm.

Abstract: According to aspects of the present invention, provided are a welded steel tube and a manufacturing method for the same which can provide excellent wear resistance and also minimize hot cracking of the welded portion, so a lifespan thereof may be effectively maximized even when applied in harsh wear-resistant environments.

Abstract: A non-oriented electrical steel sheet according to an embodiment of the present invention includes: a steel sheet base material containing, by wt %: 2.0 to 6.5% of Si, 0.1 to 1.3% of Al, 0.3 to 2.0% of Mn, 0.005 to 0.06% of Cr, and a balance of Fe and other inevitable impurities; and an insulating coating film positioned on the steel sheet base material, wherein Formula 1 below is satisfied before stress relief annealing, and Formula 2 below is satisfied after the stress relief annealing. 0.1 ? [ Mn ? coating ? film ] ? / [ Mn ? 50 ] [ Formula ? 1 ] 10 ? [ Mn ? coating ? film ] ? / [ Mn ? 50 ] ? 1 [ Formula ? 2 ] (in Formulas 1 and 2, [Mn coating film] refers to an average content of Mn (wt %) in the insulating coating film, and [Mn 50] refers to a content of Mn (wt %) at a depth of 50 ?m from an interface between the steel sheet base material and the insulating coating film toward an inside of the steel sheet base material.

Abstract: The present exemplary embodiment relates to a negative active material precursor and its manufacturing method. According to an exemplary embodiment, it is disclosed a negative active material precursor, comprising: a stacked portion disposed at a center of the negative active material precursor and where graphite particles are stacked; and at least one of void portion disposed between the center and a surface portion of the negative active material precursor, wherein, an average particle diameter D50 is 10 to 18 ?m, and the below equation 1 is satisfied. ( D ? 90 - D ? 10 ) / D ? 50 ? 1. ? Equation ? 1 ? (In equation 1, D10, D50, and D90 mean particle diameters corresponding to 10, 50, and 90% volume accumulation from a small size, respectively.

Abstract: Disclosed herein are a floating structure and a wind power generation apparatus. The floating structure according to an aspect of the disclosure includes a plurality of columns providing buoyancy and a connecting body connecting the plurality of columns, wherein at least one of the plurality of columns includes a plurality of column bodies connected to each other, and a hollow portion formed surrounded by the plurality of column bodies.

Abstract: The present exemplary embodiments relate to a graphite-based negative electrode material, a method of manufacturing the same, a negative electrode including the same, and a lithium secondary battery including the same. The graphite-based negative electrode material according to an exemplary embodiment includes: a graphite oxide obtained by oxidizing a surface of first graphite, and a graphite coating including second graphite and low crystalline carbon positioned on a surface of the second graphite, wherein the graphite coating to the graphite oxide is 1/9 to 1/3.

Abstract: The present disclosure relates to a steel wire rod enabling the omission of softening heat treatment and a method of manufacturing same. An embodiment of the present disclosure provides a steel wire rod enabling the omission of softening heat treatment and a method of manufacturing same, the steel wire rod comprising, in weight %, 0.2-0.45% of C, 0.02-0.4% of Si, 0.3-1.5% of Mn, 0.01-1.5% of Cr, 0.02-0.05% of Al, 0.01-0.5% of Mo, 0.01% or less of N, and the balance Fe and other unavoidable impurities, wherein the microstructure of the steel wire rod is a composite structure of proeutectoid ferrite+perlite as a main phase; the steel wire rod contains 10 area % or less (including 0%) of at least one of bainite or martensite; and the average colony size of the perlite is 5 ?m or less.

Abstract: The present disclosure relates to an aluminum-based plated steel that is provided for vehicles by hot forming, an aluminum-based alloy plated steel manufactured using the same, and method of manufacturing thereof.

Abstract: An embodiment of the present invention provides a steel plate for a pressure vessel having excellent hydrogen-induced cracking resistance and a method of manufacturing same, the steel plate comprising, in weight %, 0.2 to 0.3% of carbon (C), 0.05 to 0.50% of silicon (Si), 0.1% to 0.5% (exclusive) of manganese (Mn) , 0.005 to 0.1% of aluminum (Al), 0.010% or less of phosphorus (P) , 0.0015% or less of sulfur (S), 0.001 to 0.03% of niobium (Nb), 0.001 to 0.03% of vanadium (V) , 0.001 to 0.03% of titanium (Ti), 0.01 to 0.20% of chromium (Cr), 0.01 to 0.15% of molybdenum (Mo) , 0.01 to 0.50% of copper (Cu) , 0.05 to 0.50% of nickel (Ni), 0.0005 to 0.0040% of calcium (Ca), and the balance of Fe and other inevitable impurities, wherein the average grain size of ferrite is 5-20 ?m.

Abstract: A non-oriented electrical steel sheet according to one embodiment of the present invention comprises, by wt %, 1.4-3.0% of Si; 0.001-1.5% of Mn; and 0.001-0.2% of Al, with the remainder of Fe and inevitable impurities, wherein a thickness deviation in the direction perpendicular to a rolling direction is 1.5 ?m or less per 5 mm length, and a thickness derivation in the rolling direction is 10 ?m or less per 1000 m length.

Abstract: The present disclosure relates to an austenitic stainless steel and a manufacturing method therefor, and specifically, to an austenitic stainless steel and a manufacturing method therefor, wherein the austenitic stainless steel can secure both excellent strength and ductility even after undergoing low-temperature annealing and have excellent competitiveness and corrosion resistance.

Abstract: An aspect of the present invention may provide a hot-rolled steel sheet that is excellent in terms of yield strength, vibration damping ratio, weldability, and weld site-low temperature toughness and thus has physical properties suitable for use in a vacuum train tube maximizing energy efficiency of a vacuum train; and a manufacturing method therefor.

Abstract: The present invention relates to a solution composition capable of improving pitting corrosion resistance and blackening resistance of a steel sheet, a steel sheet surface-treated using same, and a method for manufacturing the steel sheet.

Abstract: An annealing separating agent composition for a grain oriented electrical steel sheet according to an embodiment of the present invention contains 25-80 wt % of a boron compound on the basis of 100 wt % of the total solid content, with the remainder comprising at least one among magnesium oxide and magnesium hydroxide.

Abstract: The present invention relates to a hot-rolled steel sheet that can be suitably applied to an automobile chassis structure member or the like and, more specifically, to an ultrahigh-strength hot-rolled steel sheet having tensile strength of 1180 MPa or more, excellent formability, and uniform material distribution in the steel sheet, and a manufacturing method therefor.