Abstract: A non-oriented electrical steel sheet according to an exemplary embodiment of the present invention contains, by wt %, 0.005% or less (excluding 0%) of C, 1.2 to 2.7% of Si, 0.4 to 2.0% of Mn, 0.005% or less (excluding 0%) of S, 0.3% or less (excluding 0%) of Al, 0.005% or less (excluding 0%) of N, 0.005% or less (excluding 0%) of Ti, and a balance of Fe and inevitable impurities, wherein the non-oriented electrical steel sheet satisfies the following Expression 1, and a volume fraction of grains having an angle of 15° or less between a {112} plane and a rolling plane in the steel sheet is 40 to 60%. 0.3 ? ( [ Si ] + [ Al ] - 1 . 5 ) / [ Mn ] ? 0 . 8 ? 5 [ Expression ? 1 ] (In Expression 1, [Si], [Al], and [Mn] represent contents (wt %) of Si, Al, and Mn, respectively.

Abstract: Disclosed are an ultra-thick steel sheet may have excellent strength and impact toughness, and a manufacturing method thereof. The ultra-thick steel sheet comprises, in percent by weight (wt %), 0.06 to 0.1% of C, 0.3 to 0.5% of Si, 1.35 to 1.65% of Mn, 0.015 to 0.04% of AI, 0.015 to 0.04% of Nb, 0.15 to 0.4% of Cr, 0.005 to 0.02% of Ti, 0.3 to 0.5% of Ni, 0.002 to 0.008% of N, 0.01% or less of P, 0.003% or less of S, and the remainder being Fe and inevitable impurities, and a microstructure, by area fraction, comprises 80% or more of polygonal ferrite with an average grain size of 40 ?m or less and the remainder of pearlite with an average grain size of 20 ?m or less.

Abstract: The present invention pertains to a hot press forming member having excellent resistance to hydrogen embrittlement, and a method for manufacturing same. An aspect of the present invention provides a hot press forming member having excellent resistance to hydrogen embrittlement, the hot press forming member comprising a base steel plate and an alloy-plated layer formed on the surface of the base steel plate, wherein the alloy-plated layer contains pores such that pores having a size of 5 ?m or less constitute 3-30% of the surface area of the alloy-plated layer as viewed in a cross-section taken in the thickness direction of the member.

Abstract: The present disclosure is that plating steel with spangles can be subjected to constant humidity heat treatment. Due to this, the degree of blackening is different depending on the spangle pattern, and then a black plated steel sheet having a marble texture and a beautiful pattern can be obtained when the blackening is completed.

Abstract: A gas detection device is disclosed.

Abstract: A side sill for a vehicle according to the present invention may comprises: a side sill frame formed to have a cavity portion; a partition member that passes through the cavity portion and partitions the cavity portion into a first cavity and a second cavity; a first reinforcing frame which is positioned in the first cavity and contacts the side sill frame and the partition member to form a closed section in the first cavity on a thickness-direction cross-section of the side sill frame; and a second reinforcing frame which is positioned in the second cavity and contacts the side sill frame and the partition member to form a closed section in the second cavity on a thickness-direction cross-section of the side sill frame.

Abstract: The present disclosure relates to a zinc plated steel sheet having excellent fatigue strength of electrical resistance spot welds and a method for manufacturing the same. According to an aspect of the present disclosure, a zinc plated steel sheet includes a base steel sheet and a zinc-based plating layer formed on a surface of the base steel sheet, wherein a concentration profile of one or two of oxygen, and silicon and manganese measured in a depth direction from the surface of the base steel sheet has a maximum point in the depth direction from the surface, and an absolute value of a difference between a depth at which the maximum point of the concentration profile of oxygen is formed and a depth at which the maximum point of the concentration profile of one of silicon and manganese is formed is 0.5 ?m or less.

Abstract: A Zn—Mg alloy plated steel material having excellent adhesion to plating and corrosion resistance comprises base steel and a plating layer formed on the surface of the base steel, wherein the plating layer comprises a Zn single phase, a Mg single phase, an MgZn2 alloy phase, and an Mg2Zn11 alloy phase, the Zn single phase is contained in the plating layer at a proportion of 15 to 19 volumes, and the proportion of the Zn single phase in a lower t/2 area of the plating layer adjacent to the base steel may be greater than the proportion of the Zn single phase in an upper t/2 area of the plating layer on the surface layer side of the plating layer. (Here, t means the thickness (?m) of the plating layer).

Abstract: The present invention provides a side sill for vehicles, comprising: a side sill frame having a hollow portion; and a reinforcement frame disposed in the hollow portion and arranged in the longitudinal direction of the side sill frame, wherein: the reinforcement frame includes unit sections which are successive in the longitudinal direction of the side sill frame and have changing heights; and the upper and lower surfaces of the reinforcement frame are spaced apart from the side sill frame.

Abstract: The present disclosure relates to a bonding composition for an electrical steel sheet, and a steel sheet and a laminate to which same is applied, the bonding composition comprising polyurethane formed by reacting a diisocyanate monomer and a polyol, wherein the diisocyanate monomer can comprise an aromatic diisocyanate monomer and an aliphatic diisocyanate monomer.

Abstract: A method of analyzing a motion on the basis of feature tracking is disclosed. The method includes the steps of: capturing image frames; filtering a region of interest (ROI) for the captured image frames; tracking a feature in the captured image frames; removing an extreme value on the basis of an optimum model; and outputting an analysis result. Further disclosed is a system of analyzing a motion on the basis of feature tracking, the system comprising a controller configured to perform each step of the method.

Abstract: The present invention relates to an iron core of a transformer having low no-load noise and a manufacturing method therefor, and the iron core of a transformer comprises: a pair of yokes, which are formed by stacking a plurality of electrical steel sheets and the pair of yokes are parallel to each other; and a leg, which is formed by stacking a plurality of electrical steel sheets, and the leg connects the pair of yokes, wherein, in a coupling part in which the yokes and the leg are connected, the ends of the electrical steel sheets of the yokes and the ends of the electrical steel sheets of the leg have inclined surfaces corresponding to each other, the inclined surfaces are shape-fitted, one electrical steel sheet of the yokes is stacked, through step lapping, on another electrical steel sheet of the yokes, and one electrical steel sheet of the leg can be stacked, through step lapping, on another electrical steel sheet of the leg.

Abstract: The present invention relates to: an electrical steel sheet including: an electrical steel sheet; and a bonding coating layer positioned on the electrical steel sheet, and further including: a first interface layer positioned in the electrical steel sheet and brought into contact with the bonding coating layer; and a second interface layer positioned in the bonding coating layer and brought into contact with the first interface layer, in which 70 mol % or more of total Si content in the bonding coating layer including the second interface layer is present in the second interface layer.

Abstract: Provided is a thermally conductive and electrically insulating paint composition, and an exterior steel sheet for a solar cell, comprising same. Specifically, the thermally conductive and electrically insulating paint composition includes: a first mixture, which comprises a thermoplastic resin and a thermally conductive filler, a polymer dispersant, and a first hydrocarbon-based solvent; and an exterior steel sheet for a solar cell, comprising: a steel sheet on which a heat dissipation layer is formed on one surface thereof; and a thermally conductive and electrically insulating coating layer which comprises a thermoplastic resin, a thermally conductive filler and a polymer dispersant, and which is formed on the other surface of the steel sheet, wherein the thermally conductive filler is dispersed in the coating layer in a form of being encompassed by the polymer dispersant.

Abstract: Disclosed are aa austenitic stainless steel free of surface cracks and having excellent surface roughness in a bent portion and a manufacturing method thereof. The austenitic stainless steel according to an embodiment of the present disclosure includes, in percent by weight (wt %), 0.005 to 0.03% of C, 0.1 to 1% of Si, 0.1 to 2% of Mn, 6 to 12% of Ni, 16 to 20% of Cr, 0.01 to 0.2% of N, 0.25% or less of Nb, and the balance of Fe and inevitable impurities, wherein an average grain size (d) of a central portion in a thickness direction is 5 ?m or less, and a martensite area fraction measured in the bent portion after a 180° bending test is 10% or less.

Abstract: Disclosed is a martensitic stainless steel with improved strength and corrosion resistance. The disclosed martensitic stainless steel sheet comprises, in percent by weight (wt %), 0.3 to 0.5% of C, 0.01 to 0.025% of N, 0.3 to 0.5% of Si, 0.4 to 0.6 of Mn, 13.1 to 14.5% of Cr, 0.95 to 1.10% of Mo, 0.05 to 0.3% of V, 0.3 to 0.5% of Ni, 0.001 to 0.5% of Cu, and the balance being Fe and inevitable impurities, and satisfies Formula (1). Formula (1): 16.4?(Cr+3.3Mo+16N)*(Mo+V)?23.3, wherein Cr, N, Mo, and V denote the contents (wt %) of respective elements.

Abstract: One aspect of the present invention provides a plated steel sheet and a manufacturing method therefor, the plated steel sheet comprising: a base steel sheet; a Zn—Mg—Al-based plated layer provided on at least one surface of the base steel sheet; and an Fe—Al-based inhibition layer provided between the base steel sheet and the Zn—Mg—Al-based plated layer, wherein, on the surface of the Zn—Mg—Al-based plated layer, the total area fraction of an Al single phase and MgZn2 phase is 45-60%, and the area ratio of the MgZn2 phase to the Al single phase is 1.2-3.3.

Abstract: The present disclosure provides a hot-press formed part comprising a plated steel sheet and an aluminum alloy plated layer formed on the plated steel sheet, wherein the aluminum alloy plated layer comprises: an alloying layer (I) formed on the plated steel sheet and containing, by weight %, 5-30% of Al; an alloying layer (II) formed on the alloying layer (I) and containing, by weight %, 30 to 60% of Al; an alloying layer (III) formed on the alloying layer (II) and containing, by weight %, 20-50% of Al and 5-20% of Si; and an alloying layer (IV) formed continuously or discontinuously on at least a part of the surface of the alloying layer (III), and containing 30-60% of Al, wherein the rate of the alloying layer (III) exposed on the outermost surface of the aluminum alloy plated layer is 10% or more.

Abstract: Disclosed are a wire rod and a steel wire for a spring, a spring with improved strength and fatigue limit, and a method for manufacturing the same. The disclosed wire rod for a spring with improved strength and fatigue limit according to an embodiment includes, in percent by weight (wt %): 0.6 to 0.7% of C, 2.0 to 2.5% of Si, 0.2 to 0.7% of Mn, 0.9 to 1.5% of Cr, 0.015% or less of P, 0.01% or less of S, 0.01% or less of Al, 0.01% or less of N, 0.25% or less of Mo, 0.25% or less of W, 0.05% to 0.2% of V, 0.05% or less of Nb, and the balance of Fe and unavoidable impurities, wherein Mn+Cr?1.8% and 0.05 at %?Mo+W?0.15 at % may be satisfied.

Abstract: Provided is a composition for steel sheet surface coating, the composition comprising colloidal silica, a silane, a monomer, an organic resin, an acidity adjuster, a long-term corrosion-resistance improver, and a solvent; and a steel sheet coated with the composition. The steel sheet has excellent acid resistance, and maintains thickness uniformity thereof even when exposed to an acid for an extended period of time.