A processing apparatus is a processing apparatus that irradiates a surface of an object with processing light to process an object and is provided with: a light irradiation apparatus that emits first processing light to form a first irradiation area on the surface and emits second processing light to form a second irradiation area, at least a part of which overlaps with the first irradiation area, on the surface, and has a change member that is configured to change a state of an overlap between the first and second irradiation areas.

A laser etching apparatus includes a chamber, a laser port, a laser emitter, a particle grabber, and a revolving window module. The chamber is configured to receive a substrate. The laser port is disposed below the chamber in a downward direction. The laser emitter is configured to emit a laser to the substrate disposed within the chamber through the laser port. The particle grabber is disposed within the chamber and includes a body disposed over the laser port. An opening is formed through the body. The opening is configured to pass the laser therethrough. The revolving window module includes a revolving window and a driving part configured to drive the revolving window. The revolving window is disposed between the particle grabber and the laser port.

A method for fusion welding of one or more steel sheets (1, 2) made of press-hardened steel, preferably manganese-boron steel is disclosed. At least one of the steel sheets has a metallic coating (4) which contains aluminum, and the fusion welding is performed while filler material (11) is being fed into the molten bath (9). In order to improve the hardenability of the weld seam (14), irrespective of whether the steel sheets to be welded together are steel sheets of the same or different material grades and/or steel sheets of different sheet thicknesses, a single laser focal spot (16) with different energy distribution is generated on the molten bath by means of one or more optical elements such that the laser focal spot (16) has a smaller laser focal spot area (16.1) and a larger laser focal spot area (16.2).

A processing system is a processing system that processes an object by processing light, and is provided with: an inspection apparatus that performs an extraneous substance inspection in an inspection target area on a surface of the object; and an irradiation apparatus that irradiates the inspection target area with the processing light.

To solve the problem about the difference in temperature increasing rate between an overlapped part and a one-sheet part so as to further improve the corrosion resistance of plating after hot stamping. An overlapped blank for hot stamping includes: a first steel sheet; and at least one second steel sheet connected to a surface of the first steel sheet via a welding point and smaller in area than the first steel sheet, wherein: the first steel sheet is a plated steel sheet having an aluminum-based plated layer on both faces of the first steel sheet, and the second steel sheet is a plated steel sheet having an aluminum-based plated layer on both faces of the second steel sheet; a coating weight of the aluminum-based plated layer on the first steel sheet is W1 (g/m.sup.2) in terms of an average coating weight on both the faces; a coating weight of the aluminum-based plated layer on a surface on a side not in contact with the first steel sheet in the second steel sheet is W2 (g/m.sup.2); and each of the W1 and the W2 is within a range of 20 g/m.sup.2 or more and 120 g/m.sup.2 or less, and satisfies relationships of Expression (1) and Expression (2).

A method for laser welding the end faces of joints of two connecting flanges, which are held against each other, of two connecting partners made from a steel material, of which at least one is provided with a metallic coating with an evaporation temperature that is below the melting temperature of the steel material. The method is carried out such that, for the process of laser welding, the connecting flanges of the two connecting partners are held against each other enclosing an angle that opens pointing in a direction from the joint side on which the laser is applied, as a result of which a degassing gap, which increases in the direction of heat introduction, is provided between the connecting flanges, through which degassing gap evaporation products of the coating material resulting from the introduction of heat are carried off.

An assembly of an aluminum-based part and a press hardened steel part provided with an alloyed coating including in weight percent, 0.1 to 15.0% silicon, 15.0 to 70% of iron, 0.1 to 20.0% of zinc, 0.1 to 4.0% of magnesium, the balance being aluminum, on at least one of the surfaces thereof placed so as to be in contact with the aluminum-based part.

Disclosed is a different-strength steel welding component with an aluminum or aluminum-alloy plating formed by means of butt welding of a high-strength steel plate and a low-strength steel plate, and each of the high-strength steel plate and the low-strength steel plate comprises a base body and at least one pure aluminum or aluminum-alloy plating on a surface of the base body. The tensile strength of a welding seam of the welding component after hot stamping is greater than the tensile strength of a low-strength steel base metal, and the elongation is greater than 4%, such that application requirements of the welding component in the field of automobile hot stamping are met. The present disclosure also relates to a method for manufacturing a different-strength steel welding component with an aluminum or aluminum-alloy plating and a welding wire used in the method.

An improved glazing unit including a glass panel which is low in reflectance for RF radiation, a coating system which is high in reflectance for RF radiation disposed on the glass panel and creating onto the glazing unit a dual band bandpass filter. The glazing unit further includes at least one frequencies selective decoated portion of the coating system extending along a plane, P; having a width, DW, and a length, DL. The at least one frequencies selective decoated portion features a first decoated element with a plurality of unit cells, and a plurality of second decoated elements where a second decoated element is placed in a unit cell of the first decoated element, but no second decoated element is in contact with the first decoated element and at least one unit cell of the first decoated element has no second decoated element.

A display device includes a display panel for displaying an image, and including a folding area configured to be folded about a folding axis, and a non-folding area adjacent to the folding area, and also includes a window on the display panel, including a flexible material, and configured to be folded along the display panel, wherein a side surface of the window has a first surface roughness in the non-folding area, and has a second surface roughness in the folding area that is less than the first surface roughness.