Abstract: An incombustible color-coated steel sheet for household appliances and building materials and a method for manufacturing the same, includes a flame-retardant coating composition that is a colored coating composition coated on a base steel sheet so that the coated steel sheet can have more than a certain level of flame-retardant properties and can also exhibit excellent physical properties, including processability, coating adhesion, corrosion resistance, and hardness.

Abstract: Disclosed are a metal separation plate for a fuel cell stack, which includes protrusion patterns each having an air path opened in a short-side direction or protrusion patterns each having an air path of which one side is opened and the other side is closed, and can not only improve cooling performance and stack performance without a separate cooling plate mounted therein, and but also improve humidification performance of a membrane electrode assembly (MEA) by blocking moisture leaking from the inside of the closed air paths, and a fuel cell stack having the same.

Abstract: Disclosed is a method and apparatus for forming a coating layer using a physical vapor deposition apparatus equipped with a sputtering apparatus and an arc ion plating apparatus, comprising: a first coating step of forming a Mo coating layer on a base material using a the sputtering apparatus and a Mo target and Ar gas; a nitrating step of forming a nitride film forming condition using an arc ion plating apparatus and Ar gas and N2 gas; a second coating step of forming a nano composite coating layer of Cr—Mo—N using the Mo target and Ar gas of the sputtering apparatus and the Ar gas, N2 gas and a Cr source of the arc ion plating apparatus at the same time; and a multi-coating step of forming a multi-layer having alternating Cr—Mo—N nano composite coating layers and Mo coating layers by revolving the base material around a central pivot.

Abstract: Disclosed herein is a roof for an electric furnace. The roof includes: a small-ceiling seating port (120) which has a small-ceiling seating surface (122) and a small-ceiling support surface (124) that extends from the small-ceiling seating surface inwards and downwards; and a large ceiling (130) which has an upper roof panel (132) that radially extends from the small-ceiling seating port at a downward inclination angle, a lower roof panel (134) disposed below the upper roof panel at a position spaced apart from the upper roof panel, and a side roof panel (136) connected to the upper roof panel and the lower roof panel. The upper roof panel is connected to the outer circumferential surface of the small-ceiling seating port, and the lower roof panel is connected to a lower end of the small-ceiling support surface so that the inclination angle of the lower roof panel can be increased.

Abstract: A low-alloy and corrosion-resistant steel for a vehicle, may include about 0.001 wt % to about 0.1 wt % of C, about 0.01 wt % to about 0.5 wt % of Si, about 0.1 wt % to about 0.6 wt % of Mn, more than 0 wt % and about 0.18 wt % or less of P, more than 0 wt % and less than about 0.02 wt % of S, about 0.001 wt % to about 0.03 wt % of Nb, more than 0 wt % and about 0.03 wt % or less of Cr, about 0.05 wt % to about 0.3 wt % of Cu, about 0.05 wt % to about 0.2 wt % of Ni, and more than 0 wt % and about 0.2 wt % or less of a combined weight of Sn and Sb, and the balance iron and inevitable impurities.

Abstract: Disclosed are a steel sheet having excellent and a method for producing the same. The disclosed steel sheet comprises, by weight, 0.005-0.06% carbon (C), 0.2% or less silicon (Si), 1.0-2.0% manganese (Mn), 0.01% or less sulfur (S), 0.2-2.0% aluminum (Al), one or more of chromium (Cr) and molybdenum (Mo) in an amount satisfying 0.3?[Cr wt %]+0.3[Mo wt %]?2.0, and 0.008% or less nitrogen (N), with the remainder being iron (Fe) and inevitable impurities, wherein the density of dislocations in the ferrite matrix of the steel sheet is 1×1013/m2 or more.

Abstract: A method for producing a molded article includes the steps of: preparing a first steel plate and a second steel plate. The first steel plate and the second steel plate are joined to each other, thereby preparing a joined steel plate. The joined steel plate is heated at a temperature between 910° C. and 950° C. The heated joined steel plate is then subjected to hot-press molding, thereby preparing an intermediate molded article; and cooling the intermediate molded article, wherein the first steel plate has a tensile strength (TS) higher than that of the second steel plate.

Abstract: Provided is a camber control apparatus and method capable of reducing camber of a slab sizing press (SSP). The camber control apparatus and method may calculates a camber amount through an imaging process and differently set zeroing of anvils at a work side and a drive side, thereby reducing camber. Thus, the camber control apparatus and method can reduce quality defects such as telescope, twist, wave, and roll mark, increase the lifetime of equipment by reducing a variation in load applied to the equipment, and minimize a cost caused by an equipment accident.

Abstract: A high-strength steel sheet according to the present invention comprises, by weight, 10.0-15.0% Mn, 6.0-9.0% Al, 0.5-2.0% Cr, 0.8-1.6% C, and 0.001-0.01% N, and further comprises, by weight, 0.02-0.1% V, 0.005-0.015% Nb, and 0.005-0.02% Mo, or further comprises 0.1-0.5 wt % TiAl particles. The high-strength steel sheet has a mixed structure comprising austenite and a fine k-carbide having a mean particle diameter of 10-500 nm.

Abstract: A door impact beam that is disposed across a door frame of a vehicle and a method of manufacturing the door impact beam may include a body formed in a pipe shape and concaved on a side facing an external side of the vehicle; and coupling portions integrally extending from first and second end portions of the body to be coupled to the door frame through spot welding.

Abstract: Disclosed are a steel composition and a spring steel comprising the same. The steel composition comprises: an amount of about 0.51 to 0.57% by weight of carbon (C), an amount of about 1.35 to 1.45% by weight of silicon (Si), an amount of about 0.95 to 1.05% by weight of manganese (Mn), an amount of about 0.60 to 0.80% by weight of chromium (Cr), an amount of about 0.25 to 0.35% by weight of copper (Cu), an amount of about 0.05 to 0.15% by weight of vanadium (V), an amount of about 0.25 to 0.35% by weight of nickel (Ni), an amount of about 0.003 to 0.015% by weight of phosphorus (P), an amount of about 0.003 to 0.010% by weight of sulfur (S), and iron (Fe) constituting the remaining balance of the steel composition, all the % by weights are based on the total weight of the steel composition.

Abstract: Disclosed herein is a coil spring steel, comprising, by weight, carbon (C): about 0.51% to about 0.57%, silicon (Si): about 1.35% to about 1.45%, manganese (Mn): about 0.95% to about 1.05%, phosphorus (P): from about 0.003% to about 0.015%, sulfur (S): from about 0.003% to about 0.010%, chromium (Cr): from about 0.70% to about 0.90%, copper (Cu): from about 0.30% to about 0.40%, vanadium (V): from about 0.10% to about 0.15%, aluminum (Al): from about 0.010% to about 0.040%, titanium (Ti) from about 0.010% to about 0.033%, molybdenum (Mo): from about 0.05% to about 0.15%, nickel (Ni): from about 0.25% to about 0.35%, and a balance of iron (Fe) and inevitable impurities to form 100%.

Abstract: The present invention relates to a method of manufacturing a slag discharge door, which is provided separately from a molten-steel discharge opening in an electric furnace and opens and closes a slag discharge opening for discharging slag. The method of manufacturing the slag discharge door, which moves up and down on the slag discharge opening to open and close the slag discharge opening, includes the steps of: forming a door body by forging, forming a coolant passage, a coolant inlet, and a coolant outlet in the door body by drilling, and then finishing a passage that blocks a portion that is open toward an outer surface of the door body.

Abstract: Disclosed are a hot stamping part with enhanced toughness and a method for manufacturing the same, in which the hot stamping part has a tensile strength (TS) of 700-1,200 MPa after hot stamping while guaranteeing elongation (EL) of 12% or more by adjusting alloy components and controlling process conditions.

Abstract: Disclosed are a tailor welded blank and a manufacturing method thereof. The tailor welded blank is manufactured by connecting blank elements of different materials or thicknesses, thereby eliminating quality problems in a welded zone. A hot stamped component is manufactured by hot stamping the tailor welded blank formed by laser-welding blank elements made of coated steel plates having different strengths or thicknesses using a filler wire, wherein a laser-welded zone has a martensite structure.

Abstract: The present invention provides a method for controlling the surface quality of an ultra-low carbon steel slab, the method comprising the steps of: measuring the phosphorus (P) concentration, sulfur (S) concentration and superheating degree of a molten steel which is introduced into a mould in a continuous casting process for producing the ultra-low carbon steel slab, the width of the mould, and the casting speed of the slab; and calculating the depth of a hook which is formed when the molten steel is solidified into the slab, based on the measured width of the mould, the measured phosphorus (P) concentration, sulfur (S) concentration and superheating degree of the molten steel, and the measured casting speed of the slab.

Abstract: A belt replacement device may include: a base portion having a belt placed thereon, the belt being wound in a roll shape; a rotating portion mounted on the base portion, and rotating the belt wound in a roll shape; a transporting portion holding and transporting the belt passed through the rotating portion; a guide portion guiding the belt discharged through the transporting portion; and a loading portion to which the belt dropped from the guide portion is loaded, and the belt replacement device can improve winding workability for the belt.

Abstract: The present invention discloses pulverized coal for iron making comprising cow manure and a method for producing pig iron using the same. The present invention has the advantage of making it possible to improve the combustion properties of pulverized coal and to increase the efficiency and safety of a blast-furnace operation.

Abstract: The present invention relates to a system and method for diagnosing cracking in a solidified shell in a mold, in which whether longitudinal cracking has occurred in the solidified shell can be diagnosed in real time by using a variation in temperature of the solidified shell in the mold during a continuous casting process. The system comprises: a plurality of temperature sensors arranged in a matrix form in a mold, wherein the plurality of temperature sensors are divided into a first group and a second group based on where cracking occurs; and a processor configured to: calculate a temperature difference between the temperature of the first group and the temperature of the second group from the temperatures detected by the plurality of temperature sensors; and determine, using the calculated temperature difference, whether cracking has occurred in a solidified shell discharged from the mold.

Abstract: A slag discharge door device for an electric furnace is provided. The device prevents slag from flowing out via a slag discharge port by making a discharge control door body move up and down to and from the upper surface of a supporting body where slag is discharged by flowing to the upper surface, and the discharge of slag is controlled, such that during steel-making work in the electric furnace, the outflow of slag is prevented and heat losses are reduced, the efficiency of arc heat due to the formation of foamed slag is increased, and valuable metals are recovered from the molten slag thereby increasing the percentage of molten steel recovered.