An efficient straight through medium-heavy plate production line of double rack and double shearing line and a production method are provided. The medium-heavy plate production line comprises: a main rolling line, at least two parallel shearing lines, and straightening stacking lines that are each configured parallel outside each of the shearing lines, the main rolling line comprises: a heating furnace, a high pressure water descaling machine, a fixed width press, a stand roller, a four-roll roughing mill, an intermediate cooling device, a four-roll finishing mill, an ACC accelerated cooling device, a hot straightening machine, a 1# labeling device and a hot segmenting shear are arranged in order, and a 1# cooling bed, a 1# inspection stand, a 2# cooling bed and a 2# inspection stand are arranged at two sides of the steel rolling and delivery rolling way; a plate turnover machine; and a traverse stand.

A method for producing a flat steel product with high reflectivity, in which at least one surface has an arithmetic mean roughness Ra of less than 0.03 μm includes providing a flat steel product, at least one surface of which has an arithmetic mean roughness Ra of less than 2.5 μm. The flat steel product is cold rolled in a plurality of rolling passes. Also a flat steel product with high reflectivity in the finished re-rolled state on at least one of its surface has a low arithmetic mean roughness, a high gloss, and a high directed reflection. A solar concentrator is produced from such a flat steel product.

A method for producing a sheet metal product (1) from a sheet metal preliminary product (2) is proposed, wherein at least one surface (7) of the sheet metal preliminary product (2) is coated with a coating, wherein the sheet metal preliminary product (2) is rolled, wherein depressions (6) are rolled into the surface (7) during the rolling operation, wherein after the coating and rolling operations lubricant (8.1) is introduced into the depressions (6), wherein after the introduction of lubricant (8.1) the sheet metal preliminary product (2) is mechanically formed by a forming tool (5), characterized in that the surface (7) is coated in such a way that, in the forming tool (5) during the forming process, in particular under relative movement between sheet metal surface and tool surface, the coating is elastically deformable under loads of 0.5 MPa to 20 MPa and plastically deformable under loads of above 20 MPa.

A device and method of preparing metal blanks including applying a series of dimples in metal feed stock.

A bending apparatus for forming a helical strip of material. The bending apparatus comprises at least one bending head and is arranged to deform a strip of material into a helical form by applying a stress to a ridge running longitudinally along the strip of material to provide a plastic deformation of the ridge. The helical form of the helical strip of material is a permanent distortion due to the deformation of the ridge applied by the at least one bending head.

A high-silicon steel sheet is excellent in terms of punching workability and magnetic property. The high-silicon steel sheet has a chemical composition containing, by mass %, C: 0.02% or less, P: 0.02% or less, Si: 4.5% or more and 7.0% or less, Mn: 0.01% or more and 1.0% or less, Al: 1.0% or less, O: 0.01% or less, N: 0.01% or less, and the balance being Fe and inevitable impurities, a grain-boundary oxygen concentration (oxygen concentration with respect to chemical elements segregated at grain boundaries) of 30 at % or less, and a microstructure in which a degree of integration P(211) of a {211}-plane of -Fe on a surface of the steel sheet is 15% or more

P(211)=p(211)/S100(%), wherein

S=p(110)/100+p(200)/14.93+p(211)/25.88+p(310)/7.68+p(222)/1.59+p(321)/6.27+p(411)/1.55, and p(hkl): integrated intensity of a peak of X-ray diffraction of an {hkl}-plane.

A method of manufacturing a brazing sheet includes layering at least a core-material slab composed of an aluminum material and a filler-material slab composed of an AlSi series alloy to prepare a clad slab. At least one aluminum slab in the clad slab, which is disposed in a range from the core-material slab to the filler-material slab inclusive, contains a metal element that oxidizes more readily than Al. The clad slab is hot rolled to prepare a clad sheet that includes a core material composed of the core-material slab and a filler material composed of the filler-material slab. Then, one or more passes of cold rolling is performed on the clad sheet. Between passes of cold rolling or after completion of the cold rolling, at least one surface of the clad sheet is etched using an alkaline etching solution having a sodium hydroxide concentration of 0.05-1.0 mass %.