The invention relates to a rolled composite aerospace product comprising a 2XXX-series core layer and a 6XXX-series aluminium alloy clad layer coupled to at least one surface of the 2XXX-series core layer, wherein the 6XXX-series aluminium alloy comprises, in wt. %, Si 0.3% to 1.0%, Mg 0.3% to 1.1%, Mn 0.04% to 1.0%, Fe 0.03% to 0.4%, Cu up to 0.10%, Cr up to 0.25%, V up to 0.2%, Zr up to 0.2%, Zn up to 0.5%, Ti up to 0.15%, unavoidable impurities each <0.05%, total <0.15%, balance aluminium. The invention further relates to a method of manufacturing such a rolled composite aerospace product.

The invention relates to a rolled composite aerospace product comprising a 2XXX-series core layer and a 6XXX-series aluminium alloy clad layer coupled to at least one surface of the 2XXX-series core layer, wherein the 6XXX-series aluminium alloy comprises, in wt. %, Si 0.3% to 1.0%, Mg 0.3% to 1.1%, Mn 0.04% to 1.0%, Fe 0.03% to 0.4%, Cu up to 0.10%, Cr up to 0.25%, V up to 0.2%, Zr up to 0.2%, Zn up to 0.5%, Ti up to 0.15%, unavoidable impurities each <0.05%, total <0.15%, balance aluminium. The invention further relates to a method of manufacturing such a rolled composite aerospace product.

A method for manufacturing an aluminum alloy sheet may include melting aluminum alloy composition containing silicon (Si), iron (Fe), copper (Cu) and manganese (Mn) in weight % on the basis of remainder of aluminum (Al) to make cast alloy having a constant initial thickness; rolling the cast alloy to allow the initial thickness to be reduced, whereby the cast alloy is elongated to aluminum alloy sheet; and performing heat treatment on the aluminum alloy sheet.

A method for manufacturing an aluminum alloy sheet may include melting aluminum alloy composition containing silicon (Si), iron (Fe), copper (Cu) and manganese (Mn) in weight % on the basis of remainder of aluminum (Al) to make cast alloy having a constant initial thickness; rolling the cast alloy to allow the initial thickness to be reduced, whereby the cast alloy is elongated to aluminum alloy sheet; and performing heat treatment on the aluminum alloy sheet.

An aluminum-lithium alloy with low density, high strength, and high elastic modulus and its production method are provided. A chemical composition of the aluminum-lithium alloy with low density, high strength, and high elastic modulus by weight is: Cu 1.5-4.5 wt %, Li 2.4-3.8 wt %, Mg 0.5-2.0 wt %, Zn 0.5-1.0 wt %, Ag 0.3-0.8 wt %, Er 0.05-0.3 wt %, Zr 0.05-0.25 wt %, Fe≤0.08 wt %, Si≤0.05 wt %, and the balance is Al and inevitable impurities. The production method includes: preparing raw materials, drying, adjusting pressure of an electromagnetic-induction furnace, melting in a vacuum induction furnace, power adjustment, casting, heat treatment, cooling. Degassing and slag removals are avoided, and defects of aluminum-lithium alloy during production are reduced.

An apparatus, material and method for forming a brazing sheet has a high strength core bonded with corrosion protection layer on the coolant side and/or layers on both airside and coolant side. The material enables heat exchanger components, such as tube, header, plate, etc., for applications, such as automotive heat exchangers, that require high fatigue life as well as high service life in a corrosive environment.

A method for the practice-oriented, operationally reliable production of castings of an AlCu alloy which consists of Cu, Mn, Zr, Fe, Si, Ti, V, remainder Al and unavoidable impurities. A melt which has been melted according to this alloy formula is kept at temperature for several hours and then mixed vigorously at least once. Thereafter, the melt is cast in portions into the respective casting which is then solution annealed at temperature for several hours. The casting is quenched from the solution anneal temperature to a maximum temperature of 300° C., at a specified cooling rate which the casting passes through during quenching. The casting is then artificially aged for several hours at 150-300° C. Finally, the casting is cooled to room temperature.

The present invention relates to a high-strength aluminum alloy thick plate composed of an aluminum alloy including a prescribed quantity of Si, Mg, Ti, Fe, and the balance Al. The thick plate has a material structure in which an area ratio of Mg.sub.2Si having circle equivalent diameters of 3 μm or more in a plate thickness central portion is 0.45% or less; and an area ratio of Mg.sub.2Si having circle equivalent diameters of 3 μm or more in a region of 20 mm±1.5 mm from a plate surface in a plate thickness direction is 1.2 times or more and 3.0 times or less the area ratio of Mg.sub.2Si having circle equivalent diameters of 3 μm or more in the plate thickness central portion. The aluminum alloy thick plate has sufficient strength and good uniformity of strength in the plate thickness direction, and can be manufactured by cooling it after a solution treatment, so that suitable temperature difference occurs between a plate thickness central portion and a surface, and then performing a quenching treatment.

The present invention relates to a high-strength aluminum alloy thick plate composed of an aluminum alloy including a prescribed quantity of Si, Mg, Ti, Fe, and the balance Al. The thick plate has a material structure in which an area ratio of Mg.sub.2Si having circle equivalent diameters of 3 μm or more in a plate thickness central portion is 0.45% or less; and an area ratio of Mg.sub.2Si having circle equivalent diameters of 3 μm or more in a region of 20 mm±1.5 mm from a plate surface in a plate thickness direction is 1.2 times or more and 3.0 times or less the area ratio of Mg.sub.2Si having circle equivalent diameters of 3 μm or more in the plate thickness central portion. The aluminum alloy thick plate has sufficient strength and good uniformity of strength in the plate thickness direction, and can be manufactured by cooling it after a solution treatment, so that suitable temperature difference occurs between a plate thickness central portion and a surface, and then performing a quenching treatment.

An aluminum alloy contains at least 0.03 mass % and at most 1.5 mass % of Mg, at least 0.02 mass % and at most 2.0 mass % of Si, and a remainder composed of Al and an inevitable impurity, a mass ratio Mg/Si being not lower than 0.5 and not higher than 3.5. In a transverse section of the aluminum alloy wire, a rectangular surface-layer void measurement region having a short side of 30 μm long and a long side of 50 μm long is taken from a surface-layer region extending by up to 30 μm in a direction of depth from a surface of the aluminum alloy wire. A total cross-sectional area of voids present in the surface-layer void measurement region is not greater than 2 μm.sup.2.