Uacj Corporation

Sumitomo Light Metal Industries, Ltd.

Constellium Neuf-brisach

Mineo Asano

Hiroki Tanaka

Yusuke Yamamoto

Tsutomu Furuyama

Tadashi Minoda

Hidetaka Nakanishi

Yoshikazu Ozeki

Yoshifumi Shinzato

Toshihiko Fukuda

Hidetoshi Uchida

Gilles Guiglionda

Kazushige Norikane

Laurent Boissonnet

Sylvain Carisey

Yoichiro Betsuki

The invention concerns a method for producing a 6xxx series aluminium sheet comprising the steps of homogenizing an ingot made from a 6XXX series aluminum alloy; cooling the homogenized ingot with a cooling rate in a range of from 150&#xb0; C./h to 2000&#xb0; C./h directly to the hot rolling starting temperature; hot rolling the ingot to a hot rolling final thickness and coiling at the hot rolling final thickness with such conditions that at least 50% recrystallization is obtained; cold rolling to obtain a cold rolled sheet. The method of the invention is particularly helpful to make sheets for the automotive industry which combine high tensile yield strength and good formability properties suitable for cold stamping operations, as well as high surface quality and high corrosion resistance with a high productivity.

Method of making 6XXX aluminium sheets

The present disclosure relates to a method for producing an aluminum alloy rolled material for deformation molding, the method including: a step of performing homogenization treatment of an ingot including an aluminum alloy with predetermined composition; a step of cooling the aluminum alloy after the homogenization treatment so that an average cooling rate in an ingot thickness of &#xbc; part from 500&#xb0; C. to 320&#xb0; C. is 30&#xb0; C./h to 2000&#xb0; C./h; and a step of starting hot rolling at 370&#xb0; C. to 440&#xb0; C. and winding the hot-rolled aluminum alloy at 310 to 380&#xb0; C., in which the method for producing an aluminum alloy rolled material for deformation molding further includes a step of retaining the aluminum alloy after the cooling step for 0.17 hours or more at a heating temperature before rolling set within a range of 370&#xb0; C. to 440&#xb0; C. before the hot rolling.

Method for producing aluminum alloy rolled material for molding having excellent bending workability and ridging resistance

A hot blow forming method for the aluminum alloy sheet carries out a hot blow forming to an aluminum alloy sheet using a first metal mold being a female mold for forming having a protruding surface portion on an inside surface thereof and a second metal mold for gas introduction. Immediately prior to the hot blow forming, a temperature (T1) of the aluminum alloy sheet and a temperature (T2) of the first metal mold satisfy a relation (T1)-(T2)&#x2265;30&#xb0; C. and the temperature (T2) is equal to or higher than 400&#xb0; C. In the hot blow forming, the aluminum alloy sheet is made to be brought into contact with at least a part of the protruding surface portion of the first metal mold within 30 seconds from a start of the gas introduction from the second metal mold.

Hot blow forming method for aluminum alloy sheet

An aluminum-alloy sheet for a bus bar has a chemical composition containing Mg: 0.3%-0.9% (mass %, likewise below), Si: 0.2%-1.2%, Cu: 0.2% or less, and Fe: 0.5% or less, the remainder being Al and unavoidable impurities. In addition, acicular particles containing Mg and Si are present in the Al matrix at 900-4,000 particles/&#x3bc;m. In addition, Fe-based particles present in the above-mentioned Al matrix have an average circle-equivalent diameter of 5 &#x3bc;m or less, and the number of particles having a circle-equivalent diameter of more than 2 &#x3bc;m is 10,000 particles/mmor less.

Aluminum-alloy sheet for bus bar and manufacturing method thereof

An aluminum alloy plate includes peritectic elements and Mg. Wherein plate thickness of the plate is represented as t (mm), a range within &#xb1;0.01&#xd7;t from t/2 is represented as a central portion, a range within &#xb1;0.01&#xd7;t from t/4 is represented as a quarter portion, and a range within 0.02&#xd7;t from a top surface in the plate thickness direction is represented as a superficial portion, concentration of the peritectic elements is such that a concentration difference between in the central portion and in the quarter portion, and a concentration difference between in the central portion and in the superficial portion are 0.04% (mass %) or less. In addition, concentration of the Mg is such that a concentration difference between in the central portion and in the quarter portion, and a concentration difference between in the central portion and in the superficial portion of the plate thickness are 0.4% or less.

Aluminum alloy plate

An anodized aluminum alloy sheet exhibits excellent surface quality without showing a band-like streak pattern and is formed from a 5000 series aluminum alloy sheet that includes 1.0 to 6.0 mass % of Mg, wherein the concentration of Mg in a solid-solution state that is present in an outermost surface area of the aluminum alloy sheet varies in the widthwise direction of the aluminum alloy sheet in the form of a band having a width of 0.05 mm or more, and the difference in the concentration of Mg between adjacent bands is 0.20 mass % or less.

Aluminum alloy sheet that exhibits excellent surface quality after anodizing and method for producing the same

An aluminum alloy sheet that exhibits excellent surface quality after anodizing, includes a peritectic element that undergoes a peritectic reaction with at least aluminum, and requires an anodic oxide coating is characterized in that the concentration of the peritectic element in a solid-solution state that is present in the outermost surface area of the aluminum alloy sheet varies in the widthwise direction of the aluminum alloy sheet in the form of a band having a width of 0.05 mm or less, and the difference in the concentration of the peritectic element between adjacent bands is 0.008 mass % or less.

A structural aluminum alloy plate includes 7.0% to 12.0% by mass of Zn, 1.5% to 4.5% by mass of Mg, 1.0% to 3.0% by mass of Cu, 0.05% to 0.30% by mass of Zr, 0.005% to 0.5% by mass of Ti, 0.5% or less by mass of Si, 0.5% or less by mass of Fe, 0.3% or less by mass of Mn, 0.3% or less by mass of Cr, and the balance that includes aluminum and inevitable impurities. A method of producing the structural aluminum alloy plate is also provided.

Structural aluminum alloy plate and method of producing the same

A plate-like electric conductor for a busbar having excellent electric conductivity, strength and bendability, and a busbar formed therefrom. The electric conductor formed from an aluminum alloy plate having a thickness of 0.5-12 mm is obtained by subjecting an aluminum alloy consisting essentially of Fe: 0.05-2.0%; Si: 0.05-0.6%; Cu: 0.01-0.35%; by mass, and the balance comprising Al and inevitable impurities to a hot rolling process. The electric conductor has the electric conductivity of 55-60% IACS, tensile strength not lower than 170 MPa and yield strength not lower than 155 MPa, in the as-rolled state at the room temperature, and does not suffer from cracking upon bending by 90&#xb0; with an inner bending radius equal to its thickness, while having the electric conductivity of 55-60% IACS, tensile strength not lower than 160 MPa, and yield strength not lower than 145 MPa, after a heat treatment at 140-160&#xb0; C. for not longer than 1,000 hours.

Plate-like electric conductor for a busbar and the busbar formed therefrom

An aluminum alloy member including a sheet-like aluminum alloy member having ends joined by friction stir welding, and forming an anodic oxidation coating on a weld front surface or a weld back surface, the aluminum alloy member including 0.3 to 1.5 mass % of Mg, 0.2 to 1.2 mass % of Si, 0.5 mass % or less of Cu, and 0.2 mass % or less of Fe, with the balance being Al and unavoidable impurities, Fe-containing second phase particles having a particle size (circle equivalent diameter) of more than 1 &#x3bc;m, among second phase particles dispersed in a matrix of the aluminum alloy member, having an average particle size of 5 &#x3bc;m or less.

Aluminum alloy member

The present invention provides an aluminum alloy sheet for press forming, having the crystallo-graphic texture in which the orientation density of CR orientation ({001}&#x3c;520&#x3e;) is higher than that of any orientation other than the CR orientation. The orientation density of the CR orientation is preferably 10 or more (random ratio). The orientation densities of all orientations other than the CR orientation are preferably less than 10. The aluminum alloy sheet is preferably made of an Al&#x2014;Mg&#x2014;Si alloy.

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Tokyo, Japan

Mineo Asano