In an aluminum alloy composite material including an aluminum alloy matrix and a reinforcing material such as fibers, whisker or particles, intermetallic compounds made of Al and at least one selected from a group of Fe, Ni, Co, Cr, Cu, Mn, Mo, V, W, Ta, Nb, Ti and Zr are finely dispersed in the matrix existing among reinforcing material elements so as to maintain rigidity of the matrix alloy necessary to support the reinforcing material elements at high temperature. Optimum shapes and volumetric density of such intermetallic compounds are experimentally obtained.

Aluminum alloy composite material with intermetallic compound finely dispersed in matrix among reinforcing elements

PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet for a battery case which is excellent in strength, formability, laser weldability, stress relaxation property and pressure resistance even when the sheet thickness is reduced, and to provide a production method therefor. SOLUTION: The aluminum alloy sheet is composed of an aluminum alloy having a composition comprising, by mass, 0.9 to 1.5% Mn, >0.5 to 1.0% Cu, 0.2 to 0.6% Mg, 0.05 to 0.50% Si and 0.05 to 0.60% Fe, and in which the content of Zn is controlled to ≤0.10%, and the balance Al with inevitable impurities, and in which the number of Al (Fe, Mn, Si) based intermetallic compounds with the maximum length of 0.5 to 5 μm is 5,000 to 15,000 per mm 2 . COPYRIGHT: (C)2008,JPO&INPIT

Aluminum alloy sheet for battery case and production method therefor

A fiber-reinforced metal composite (aluminum-matrix composite) consisting essentially of reinforcing fibers and an aluminum alloy containing 6 to 11 wt. % of nickel of a metal matrix.

Fiber-reinforced metal composite

PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet for a drink can barrel having excellent flange formability, and to provide a method for producing the same. SOLUTION: The aluminum alloy sheet has a composition comprising 0.1 to 0.6% Si, 0.3 to 0.6% Fe, 0.1 to 0.4% Cu, 0.7 to 1.5% Mn, 0.8 to 1.5% Mg, 0.005 to 0.1% Ti and 0.0001 to 0.05% B, and the balance Al with inevitable impurities, and in which precipitate grains with a size of 0.1 to 1.0 μm at a diameter of the equivalent circle are distributed at a numerical density of ≥2.5 pieces/μm 3 in the parts other than non-precipitated zones in the vicinity of grain boundaries in the cross-section parallel to the rolling direction. In its production method, an aluminum alloy ingot is retained in the temperature range of 400 to 500°C for ≥20 min from the start of hot rough rolling to the start of hot finish rolling or is cooled in the temperature range of 400 to 500°C at ≤40°C/hr upon cooling to a room temperature after homogenizing treatment, is then subjected to hot rough rolling, is subjected to hot finish rolling at a finishing temperature of 300 to 380°C using a tandem type rolling mill with a stand number of ≥3, and is successively subjected to cold rolling at a draft of 80 to 90% without performing process annealing. COPYRIGHT: (C)2010,JPO&INPIT

Aluminum alloy sheet for drink can barrel, and method for producing the same

The invention provides a new aluminum-based alloy having properties which mimic homogenized DC cast 3003 alloy, and a low-cost method for manufacturing the alloy. The alloy contains 0.40 % to 0.70 % Fe, 0.10 % to less than 0.30 % Mn, more than 0.10 % to 0.25 % Cu, less than 0.10 % Si, optionally up to 0.10 % Ti, and the balance Al and incidental impurities. The alloy achieves properties similar to homogenized DC cast 3003 alloy when continuously cast, followed by cold rolling and, if desired, annealing at final gauge. Surprisingly, no other heat treatments are required.

Aluminum alloy composition and methods of manufacture

PURPOSE:To provide superior heat resistance and workability to a composite Al material contg. short fibers as a reinforcing material by using an Al-Fe alloy as the Al alloy and adding an element for improving the heat resistance to the alloy. CONSTITUTION:One or more kinds of reinforcing materials selected among granules, whiskers and short fibers are dispersed in an Al alloy as a matrix to obtain a composite Al alloy material. At this time, the composition of the Al alloy is composed of 3-12wt% Fe, <10wt% one or more among Co, Cr, Ni, Mn, La Zr, V, Ce, Cu, Si, Mo and Ti and the balance Al.

Composite aluminum alloy material

PURPOSE:To improve strength and formability as a material for vessels, particularly food cans, by regulating the distribution of precipitated grains in an Al alloy containing specific amounts of Si, Fe, Cu, Mn, and Mg and also the dielectric constant of the above Al alloy to specific ranges, respectively. CONSTITUTION:This Al-alloy sheet for forming has a composition consisting of, by weight, 0.15-0.50% Si, 0.30-0.65% Fe, 0.10-0.30% Mn, 0.9-1.4% Mg, and the balance Al, and further, this sheet metal contains precipitated-phase grains of <0.1mu grain size and precipitated-phase grains of 0.1-0.4mu grain size by <=0.10vol.% and 1-8vol.%, respectively, and has 33.0-38.0% dielectric constant (by IACS). Since ear rate and formability are kept superior and strength, particularly strength after baking finish, is remarkably improved in this metal sheet, this metal sheet is suitable for use in cans and, by using this material, thinning of DI cans can be accomplished.

Aluminum-alloy sheet for forming

PURPOSE:To produce an Al alloy stock for heat radiation bar excellent in formability and heat radiation characteristic by subjecting an Al alloy containing specific amounts of Si and Fe to casting at a specific cooling velocity, to cold working at a specific draft, and then to annealing CONSTITUTION:An Al alloy having a composition containing, by weight, 003-06% Si and 003-08% Fe is cast at >=180 degC/sec cooling rate The resulting cast plate is cold-worked at 70-99% cold draft Then, the resulting cold rolled sheet is annealed so as to be formed into a uniform structure By this method, the Al alloy stock for heat radiation bar which has superior strength and heat resistance and in which deterioration in thermal conductivity is prevented without deteriorating formability can be obtained

Production of aluminum alloy stock for heat radiation bar

PURPOSE:To obtain the sheet having excellent surface gloss by continuously casting and rolling a molten metal contg specific ratios of Si and Fe and consisting of the balance Al, then cleaning the sheet for a specific period of time with an alkaline soln of specific pH before at least one pass of cold rolling, and then subjecting the sheet to the cold rolling CONSTITUTION:The molten aluminum contg, by weight %, 002 to 08% Si and 005 to 10% Fe and consisting of the balance Al is subjected to the continuous casting and rolling The molten metal is rolled to the band-shaped sheet having 2 to 10mm thickness The sheet is cleaned for 1 to 300 seconds by the alkaline soln of <=pH10 before at least one pass of the rolling during the cold rolling stage and thereafter, the sheet is subjected to the cold rolling The cooling rate is increased to make cystallized matter generated at the time of the casting fine and device by executing the above-mentioned continuous casting and rolling, by which the surface quality is improved The increase in the surface roughness and the degradation in the glossiness resulted from the nonuniform partition and distribution, at the time of rolling, of the oxide films formed on the surface at the time of the casting are prevented by the above-mentioned cleaning treatment

Production of aluminum sheet having excellent surface gloss

PURPOSE:To obtain an Al foil for an electrolytic capacitor electrode having excellent etching characteristics by a method wherein, when a pure Al sheet is subjected to a cold roll process after a hot roll process, the sheet is washed with alkali solution with pH not lower than 10 before a rolling ratio exceeds 96%. CONSTITUTION:Pure Al with a purity not less than 99wt.% is employed and Fe unavoidably contained in it is utilized to activate the self-solubility of a foil. Elements such as Cu and Si may be contained as effective components. After a hot roll process, a cold roll process is performed. Before a rolling ratio exceeds 96%, the rolled product is washed with alkali solution to prevent fine Fe which is made to adhere to the foil surface in the hot roll process from causing the etching unevenness. If the rolling ratio exceeds 96%, the Fe powder is buried in the foil surface too deep to be removed completely. Alkali washing is carried out with NaOH solution with pH not lower than 10 at 15-90 deg.C for 1-100 seconds. Then acid washing is carried out as a neutralizing treatment. With this constitution, the etching unevenness on the Al foil can be avoided and the foil quite suitable for an electrode can be obtained and the characteristics of a capacitor can be improved.

Manufacture of aluminum foil for electrolytic capacitor electrode

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