The invention concerns a method for cold rolling bright aluminium rolled products and comprises: (a) Providing a first aluminium alloy rolled product (b) Rolling said first product with a rolling mill (1) having at least one work roll ground to a finish (11), with a roughness Ra less than 1 m, and using a rolling lubricant (51) from a first container (2) comprising less than 150 mg/L of aluminium debris to obtain a second aluminium rolled product having at least one bright surface, (c) Transferring at least a portion of said rolling lubricant to a second container (3) (d) Filtering the lubricant from said second container (52) by using cross flow filtration (4) through a membrane (41), to obtain a cleaned rolling lubricant (54) comprising less than 10 mg/L and preferably less than 5 mg/L of aluminium debris preferentially having a mean diameter of less than 2 m, (e) Returning said cleaned rolling lubricant (54) to the first container.

A method for manufacturing parts is provided. The method includes cold rolling a substrate with work cylinders whose work surface has a roughness Ra.sub.2.5 of less than or equal to 3.6 m, depositing the metal coating on at least one face of the annealed substrate by electrodeposition to form the metal sheet and deforming the cut metal sheet to form the parts. The outer surface of the metal coating has a waviness Wa.sub.0.8 of less than or equal to 0.5 m after the deformation step. A part and vehicle are also provided.

Metal work rolls texturized with engineered textures can impart desired impression patterns on metal strips. Engineered textures can be controlled with particularity to achieve desired surface characteristics (e.g., lubricant trapping, coefficient of friction, or surface reflectivity) on work rolls and metal strips, and to allow for impression patterns to be imparted on metal strips during high percentages of reduction of thickness (e.g., greater than about 5% or greater than about 15%, such as around 30%-55%). Engineered textures can be applied by focusing energy beams at specific points of an outer surface of a work roll to impart texture elements on the work roll. In some cases, an engineered texture element that can be used to generate a generally circular impression element can be generally elliptical in shape, having a length that is shorter than its width by a factor dependent on the reduction of thickness percentage.

Provided is a rolling roll including: a rolling roll body (112) installed to a rolling mill and used for rolling a material; and a surface treatment part formed on a surface of the rolling roll body (112) and coming into contact with the material, wherein the surface treatment part is formed to have fine concave and convex patterns forming ridges and valleys on a surface thereof, wherein the fine concave and convex patterns are formed such that the roughness skewness, indicating the difference between the height of the ridges and the depth of the valleys, has a negative () value.

A system for manufacturing an electrode for a secondary battery is disclosed herein. In an embodiment, the system for manufacturing the electrode for the secondary battery comprises a supply roller for supplying a collector having a long sheet shape; an electrode active material coating device for applying an electrode active material to a surface of the collector supplied by the supply roller to manufacture an unfinished electrode; a rolling roller for rolling a surface of the unfinished electrode and adjusting a thickness of the electrode active material to manufacture a finished electrode; and an electrode quality inspection device for inspecting quality of the electrode through a surface roughness value of the rolling roller, a surface roughness value of the surface of the electrode, and a rolling load value of the rolling roller.

Disclosed is a method for manufacturing a grain-oriented electrical steel sheet using an inhibitor-less technique, in which cold rolling includes final cold rolling with a total cold rolling reduction being set to 85% or more and a rolling reduction per pass being set to 32% or more. The final cold rolling includes one or more passes and a final pass succeeding the one or more passes and uses work rolls having a surface roughness Ra of 0.25 m or less in at least one of the one or more passes other than the final pass. According to this method, it is possible to stably manufacture a grain-oriented electrical steel sheet exhibiting excellent magnetic properties at low cost.

A planishing roll has a surface structure, in particular for producing flat products from a metallic material, in particular from a steel material. The surface structure has a material ratio of 2% at a depth of 0.2 m to 9 m, preferably at a depth of 0.8 m to 5.5 m. The depth is measured, starting from a zero line, in the direction of an axis of rotation of the planishing roll, with the zero line running parallel to the axis of rotation of the planishing roll and. Starting from the surface of the planishing roll, the zero line is displaced in the direction of the axis of rotation of the planishing roll until the material ratio of the planishing roll is 0.1%.

Discussed is an aluminum foil for ultraviolet light reflecting materials, wherein a ratio of a total surface area of aluminum particles pressed into or adhering to a region having a predetermined surface area to the surface area of the region is less than or equal to 0.05%, the total surface area of crystallized products present in the region having a predetermined surface area is less than or equal to 2% with respect to the surface area of the region, an average surface area per crystallized product is less than or equal to 2 ?m.sup.2, and arithmetic surface roughness Ra of the region is less than 20 nm.

A flat product made of a metal material has been provided with deterministic surface texture which has a plurality of depressions which have a depth in the range of from 2 to 14 m, wherein the depressions are designed to be I-shaped, H-shaped, cross-shaped, C-shaped or X-shaped, and wherein the surface texture has a peak count RPc in the range of from 45 to 180 1/cm, an arithmetic mean roughness Ra in the range of from 0.3 to 3.6 m, and an arithmetic mean waviness Wsa in the range of from 0.05 to 0.65 m. A roll which is particularly suitable for producing such a flat product has a deterministic surface texture which has a plurality of overlapping dimples, which are arranged such that they delimit a double-I-shaped, H-shaped, cross-shaped, C-shaped or X-shaped material texture in the roll surface, and wherein the surface texture of the roll, measured in the direction of the roll axis, is characterized by a peak count RPc in the range of from 80 to 180 1/cm, an arithmetic mean roughness Ra in the range of from 2.5 to 3.5 m and an arithmetic mean waviness Wsa in the range of from 0.08 to 1.0 m.

A ratio of a total surface area of aluminum particles pressed into or adhering to a region having a predetermined surface area to the surface area of the region is less than or equal to 0.05%. The total surface area of crystallized products present in the region is less than or equal to 2% with respect to the surface area of the region. An average surface area per crystallized product is less than or equal to 2 ?m.sup.2. Surface roughness Ra of the region is less than 20 nm.