Abstract: Disclosed is a method for manufacturing a plated steel sheet for an exterior panel. The disclosed method for manufacturing the plated steel sheet comprises the steps of: preparing a plated steel sheet; cutting the plated steel sheet by a fiber laser; and painting the cut plated steel sheet with a liquid-state composition comprising fluorine.

Abstract: The present exemplary embodiments relate to a positive electrode active material and a lithium secondary battery including the same. According to an exemplary embodiment, a positive electrode active material for a lithium secondary battery including a metal oxide particle including nickel, cobalt, manganese and aluminum, and two types of doping elements doped on the metal oxide particle is provided.

Abstract: A hot-dip galvanized steel sheet according to one aspect of the present invention comprises a base steel sheet and a hot-dip galvanized layer formed on the surface of the base steel sheet, wherein the difference between the average of the Mn/Si values of surface oxides present on a surface portion, which is the region from the interface between the hot-dip galvanized layer and the base steel sheet to a depth of 15 nm, and the average of the Mn/Si values of internal oxides, which are present in the region from the interface to a depth of 50-100 nm, can be 0.5 or more. Mn and Si of each oxide mean the amounts (wt %) of Mn and Si components in the oxide, which are measured by EDS, and the average of Mn/Si values means the averaged value of the Mn/Si values measured for each oxide.

Abstract: A steel sheet with excellent phosphatability, according to one embodiment of the present invention, comprises, by wt %, 0.02-0.06% of carbon (C), 0.01% or less of silicon (Si) (excluding 0%), 0.1-0.24% of manganese (Mn), 0.02% or less of aluminum (Al) (excluding 0%), 0.015-0.04% of phosphorus (P), and the balance of iron (Fe) and inevitable impurities, and has an oxide layer having a thickness of 10 nm or less inward from the surface of the steel sheet, and satisfies the following formula 1. ([Mn]+[Si]+[Al])/(3×[P])?0.6 ??[Formula 1] (In formula 1, [Mn], [Si], [Al] and [P] mean the maximum amount of each element when elemental analysis is carried out in the thickness direction of the oxide layer.

Abstract: The present disclosure relates to a bonding composition for an electrical steel sheet, and a steel sheet and a laminate employing same, wherein the bonding composition for an electrical steel sheet may comprise an adhesive resin and a bonding additive, the adhesive resin may be polyurethane, and the bonding additive may comprise a coupling agent including an amino silane.

Abstract: The objective of the present invention is to provide a composite plated steel sheet, which has excellent post-formation corrosion resistance by preventing the spread of cracks in a resin layer even if cracks occur in the plating layer of the composite plated steel sheet.

Abstract: An embodiment of the present invention provides a high strength thin steel material for API having excellent resistance to deformation and a method of manufacturing same, the steel material comprising, in weight %, C: 0.05-0.15%, Si: 0.05% or less (0% excluded), Mn: 0.5-2.5%, Nb: 0.05% or less (0% excluded), V: 0.004% or less (0% excluded), Mo: 0.03-0.2%, Cr: 0.1-0.3%, P: 0.03% or less (0% excluded), S: 0.015% (0% excluded), Al: 0.05% or less (0% excluded), N: 0.01% or less (0% excluded), and the balance being Fe and other inevitable impurities, wherein the microstructure of the steel material comprises, in area %, ferrite: 10-30% and the balance being bainite, the ferrite having an average crystal grain size of 15-30 ?m and including at least 3,000/?m2 V-based precipitates.

Abstract: A method for manufacturing a grain oriented electrical steel sheet according to an embodiment of the present invention comprises the steps of: hot-rolling a slab to prepare a hot-rolled sheet, the slab containing, in weight %, Si: 2.5 to 4.0%, C: 0.03 to 0.09%, Al: 0.015 to 0.040%, Mn: 0.04 to 0.15%, S: 0.01% or less (0% excluded), N: 0.002 to 0.012%, and the balance being Fe and other inevitably incorporated impurities; cold-rolling the hot-rolled sheet to prepare a cold-rolled sheet; performing primary recrystallization annealing on the cold-rolled sheet; and performing secondary recrystallization annealing on the cold-rolled sheet that has been primary recrystallization annealed.

Abstract: The present invention relates to a highly thick steel material and a manufacturing method therefor and, more specifically, to a highly thick steel material that exhibits excellent low-temperature impact toughness after long-term PWHT although the steel sheet is thick, and a manufacturing method therefor.

Abstract: Disclosed is: an austenitic high manganese steel for disc brake, which exhibits an excellent friction coefficient. In accordance with an embodiment of the present invention, the steel contains, in percent by weight (wt %), 0.2 to 1.8% of carbon (C), 8 to 30% of manganese (Mn), and the remainder of iron (Fe) and inevitable impurities, the microstructure comprises 90% or more of austenite by area fraction, and the length of austenitic grain boundaries may be 1 ?m or more per unit area of 100 ?m2.

Abstract: The present disclosure includes a negative active material manufacturing method for lithium secondary battery, comprising: grinding the metal-based material into metal-based material nanoparticles through a grinding process; obtaining spherical particles by spheronizing the pulverized metal-based material nanoparticle, a conductive material, and a conductive additive together; obtaining a composite by complexing the spherical particles with an amorphous carbon-based precursor material; and carbonizing the composite; the conductive additive is a carbon nanotube; a content of the carbon nanotube is 0.2 to 2.3 wt % compared to the metal-based material nanoparticle in the composite, a negative active material according to the method, and a secondary battery including the same.

Abstract: The present invention discloses an adhesive applicator for manufacturing a core, a core manufacturing apparatus, and an adhesive application method using the same. The adhesive applicator includes: a nozzle body having at least one adhesive outlet; and a nozzle plug movably provided inside the nozzle body in order to open/close the adhesive outlet. The adhesive outlet includes a nozzle hole for discharging the adhesive from the inside to the outside of the nozzle body, and the nozzle plug includes a plug body movably provided inside the nozzle body to selectively block the nozzle hole, and a plug tip formed to protrude on a fore-end surface of the plug body. The fore-end surface of the plug body has a flat surface which faces the nozzle hole and is orthogonal to an axis of the nozzle hole.

Abstract: The present invention may provide a non-oriented electrical steel sheet containing, by wt %, 2.10 to 3.80% of Si, 0.001 to 0.600% of Mn, 0.001 to 0.600% of Al, 0.001 to 0.100% of P, 0.0005 to 0.0100% of C, 0.001 to 0.010% of S, 0.0001 to 0.010% of N, 0.0005 to 0.0050% of Ti, 0.001 to 0.080% of Sn, 0.001 to 0.080% of Sb, 0.0005 to 0.0030% of Se, 0.0003 to 0.0010% of Ge, and a balance of Fe and inevitable impurities, the non-oriented electrical steel sheet having excellent iron loss and magnetic flux density and low strength.

Abstract: A method for manufacturing a grain-oriented electrical steel sheet, according to one embodiment of the present invention, comprises the steps of: manufacturing a hot rolled sheet by hot rolling a 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%) and 0.002-0.012% of N, and the balance of Fe and other inevitable impurities; cold rolling the hot rolled sheet to manufacture a cold rolled sheet; performing primary recrystallization annealing on the cold rolled sheet; and performing secondary recrystallization annealing on the cold rolled sheet for which the primary recrystallization annealing has been completed.

Abstract: A non-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes 3.3 to 4.0 weight % of Si; 0.4 to 1.5 weight % of Al; 0.2 to 1.0 weight % of Mn; 0.0015 to 0.0040 weight % of C; 0.0005 to 0.0020 weight % of N; 0.0005 to 0.0025 weight % of S; 0.005 to 0.01 weight % of Mo; 0.0005 to 0.0020 weight % of Ti; 0.0005 to 0.0020 weight % of Nb; and 0.0005 to 0.0020 weight % of V, with the remainder including Fe and other unavoidable impurities.

Abstract: A ferritic stainless steel with improved ridging resistance is disclosed herein. According to a disclosed embodiment, the ferritic stainless steel with improved ridging resistance comprises, in percent by weight (wt %), 0.001 to 0.3% of C, 0.01 to 1.0% of Si, 0.1 to 3.0% of Mn, 10 to 15% of Cr, 0.001 to 0.3% of N, 0.03% or less of P, 1.0% or less of Ni, 1.0% or less of Cu, 1.0% or less of Al, 0.003% or less of Mo, 1.0% or less of Ti, the remainder of Fe, and other unavoidable impurities, and satisfies y s represented by the following formula (1) is 6 or more.

Abstract: A metal cored wire for submerged arc welding, the wire comprising a steel sheath with a core comprising powders of: carbon in a range of about 0.3 wt. % to about 1.2 wt. %; silicon in a range of about 0.1 wt. % to about 3.0 wt. %; manganese in a range of about 9.0 wt. % to about 30 wt. %; chromium in an amount less than about 8 wt. %; nickel in an amount less than about 6 wt. %; molybdenum in an amount less than about 6 wt. %; tungsten in an amount less than about 5 wt. %; copper in an amount less than about 4 wt. %; niobium in an amount less than about 2 wt. %; vanadium in an amount less than about 2 wt. %; titanium in an amount less than about 2 wt. %; nitrogen in an amount less than about 0.4 wt. %; boron in an amount less than about 1 wt. %; at least one of: (i) sulfur in an amount less than about 0.3 wt. %; (ii) phosphorous in an amount less than about 0.03 wt. %; or a combination thereof; and the balance with iron.

Abstract: Disclosed is a ferritic stainless steel with reduced grain boundary erosion. A ferritic stainless steel with reduced grain boundary erosion according to an embodiment includes, in percent by weight (wt %), 0.005 to 0.1% of C, 0.01 to 1.0% of Si, 0.01 to 1.5% of Mn, 13 to 18% of Cr, 0.005 to 0.1% of N, 0.005 to 0.2% of Al, 0.005 to 0.1% of Ni, 0.003% or less of Mo, 0.05% or less of P, 0.005% or less of S, and the remainder being Fe and impurities, and satisfies an Acl, defined by Formula (1) below, of 900 or more and 990 or less: Ac1=36Cr+90Si+76Mo+760Al+350?(800C+1300N+150Ni+50Mn)??Formula (1): (wherein C, N, Si, Mn, Cr, Ni, Al, Mn, and Mo represent a content (wt %) of each element).

Abstract: According to an aspect of the present invention, an extremely thick steel plate for steam drum having excellent surface quality and lamellar tear resistance and a manufacturing method therefor may be provided.

Abstract: The present invention relates to a high-strength hot-dipped galvanized steel sheet having excellent surface quality and spot weldability and a method for manufacturing same. The hot-dipped galvanized steel sheet according to one aspect of the present invention comprises a base steel sheet and a hot-dipped galvanized layer formed on the surface of the base steel sheet, in which an inhibiting layer made of an Fe—Al alloy can be formed at an area ratio of 60% or more between the base steel sheet and the hot-dipped galvanized layer.