Abstract: A plant for the continuous casting of aluminum strip, according to current construction type, has two counterrotating continuous casting rolls (1, 2), between which a casting gap (4) is formed. According to the present invention, the 1. continuous casting roll (1) is made of a copper material at least in its circumferential edge region, and the other, 2. continuous casting roll (2) is made of a steel material at least in its circumferential edge region. The copper material should have a thermal conductivity ?K of 230 to 260 W/m·K, and the steel material should have a thermal conductivity ?S of 30 to 40 W/m·K. Rejecting the prevailing idea that casting can only be performed with two continuous casting roll materials of the same kind, so as to ensure uniform crystal growth, a continuous casting roll pairing of steel and copper is provided in the present invention.

Abstract: A process for manufacturing a strip of aluminum alloy having high surface homogeneity with an upper side showing after a 1 ?m thick sulphur anodic treatment, an optical roughness value SN measured on three 5 cm longitudinal sections and three 5 cm transverse sections, such that its mean variation on each section, defined by the ratio: (Maximum SN?minimum SN)/Mean SN is less than 20%, and the difference ?SN=SN max ?SN min is less than 20. The strip is manufactured by continuous casting between two cooled rolls from a casting tank containing the liquid metal connected to an injector, and feeding the liquid metal into the gap between the two rolls. The injector has an upper lip recessed by at least 2 mm with reference to a lower lip of the injector.

Abstract: A plant for the continuous casting of aluminum strip, according to current construction type, has two counterrotating continuous casting rolls (1, 2), between which a casting gap (4) is formed. According to the present invention, the 1. continuous casting roll (1) is made of a copper material at least in its circumferential edge region, and the other, 2. continuous casting roll (2) is made of a steel material at least in its circumferential edge region. The copper material should have a thermal conductivity ?K of 230 to 260 W/m·K, and the steel material should have a thermal conductivity ?S of 30 to 40 W/m·K. Rejecting the prevailing idea that casting can only be performed with two continuous casting roll materials of the same kind, so as to ensure uniform crystal growth, a continuous casting roll pairing of steel and copper is provided in the present invention.

Abstract: An aluminum alloy strip of high surface homogeneity, intended for applications requiring good visual quality or specific optical properties, such as reflectors and anodized plates for construction and decoration. The strip may be characterized by an upper side having, after a 1 &mgr;m thick sulphur anodic treatment, an optical roughness value SN measured on three 5 cm longitudinal sections and three 5 cm transverse sections, such that there is mean variation on each section, defined by the ratio: (Maximum SN−minimum SN)/Mean SN which is less than 20%, and a difference &Dgr;SN=SN max−SN min which is less than 20.

Abstract: The invention relates to a process for the coating of the rolls of a twin-roll continuous casting machine wherein a release product containing a release agent, such as graphite, is applied and the composition of the release product is adjusted as it is applied to the rolls. The invention also relates to a device for coating the rolls of a twin-roll continuous casting machine which includes means for applying a release product and means for adjusting the composition of the release product while it is applied to the rolls. The invention makes it possible to improve control of the quality and distribution of the release product over the surface of the rolls.

Abstract: A process for manufacturing a strip of aluminum alloy having high surface homogeneity with an upper side showing after a 1 &mgr;m thick sulphur anodic treatment, an optical roughness value SN measured on three 5 cm longitudinal sections and three 5 cm transverse sections, such that its mean variation on each section, defined by the ratio: (Maximum SN−minimum SN)/Mean SN is less than 20%, and the difference &Dgr;SN=SN max−SN min is less than 20. The strip is manufactured by continuous casting between two cooled rolls from a casting tank containing the liquid metal connected to an injector, and feeding the liquid metal into the gap between the two rolls. The injector has an upper lip recessed by at least 2 mm with reference to a lower lip of the injector.