Patent EP0097319A2 successfully refreshed from Google Patents.
EP0097319A2
Expired / Lapsed
EP
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A cold-rolled aluminium-alloy sheet for forming and process for producing the same
Assignee: Sumitomo Light Metal Industries Ltd
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Filing: 1983-06-15
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Granted: —
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Expires: 2003-06-15
Abstract
Abstract The present invention relates to a cold-rolled aluminum-alloy sheet having a high strength and a good formability required for producing a Dt can. The sheet according to the present invention contains 0.1 - 2.0% Mn, 0.1 - 2.0% Mg, and 0.1 to 0.5% Si, has a thickness of 0.4 mm or less. The present invention is characterized by holding a sheet to a temperature of from 80 to 150°C, when it is already heat treated at 400 - 580°C and it is not yet finally cold-rolled. The sheet according to present invention is finally cold-rolled and has a fine grain size.
Inventors
- 👤 Yoshio Baba
- 👤 Shin Tsuchida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 01:36
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/04; C22F1/05; C22C; C22C21/00; C22C21/06; C22C21/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
65 words
An aluminum-alloy cold-rolled sheet for forming, which contains, as essential elements, from 0.1% to 2.0% manganese, from 0.1% to 2.0% magnesium, and from 0.1% to 0.5% silicon, has a thickness of 0.4 mm or less, has an average diameter of grains of 50 microns or less when measured in a short width direction of the cold--rolled sheet, and has a final finishing state of cold-rolling.
Claim 2
Dependent Claim
65 words
An aluminum-alloy cold-rolled sheet for forming, which contains, as essential elements, from 0.1% to 2.0% manganese, from 0.1% to 2.0% magnesium, and from 0.1% to 0.5% silicon, has a thickness of 0.4 mm or less, has an average diameter of grains of 50 microns or less when measured in a short width direction of the cold--rolled sheet, and has a final finishing state of cold-rolling.
Claim 3
Dependent Claim
52 words
An aluminum-alloy cold-rolled sheet for forming according to claim 1, wherein it further contains at least one of from 0.1% to 0.4% copper, 0.1% or less chromium, 0.7% or less iron, 0.3% or less zinc, 0.15% or less titanium, 0.5% or less zirconium, and 0.01% or less boron as an alloying element.
Claim 4
Dependent Claim
130 words
A process for producing an aluminum-alloy cold-rolled sheet for forming, which successively comprises the steps of: hot-rolling an aluminum-alloy ingot which contains from 0.1% to 2.0% manganese, from 0.1% to 2.0% magnesium, and from 0.1% to 9.5% silicon as the essential elements; cold-rolling, if necessary; heat-treating, in which heating at a temperature of from 400°C to 580°C for the period of from 5 minutes or less is followed by rapid cooling at a rate of 10°C/second or more down to a temperature of 150°C or less; and finally cold-rolling at a rolling degree of 30% or more; said process also comprises after the heat-treating step but not after the finally cold--rolling step, a low-temperature holding step of holding an aluminum alloy sheet at a temperature of from 80°C to 150°C.
Claim 5
Dependent Claim
130 words
A process for producing an aluminum-alloy cold-rolled sheet for forming, which successively comprises the steps of: hot-rolling an aluminum-alloy ingot which contains from 0.1% to 2.0% manganese, from 0.1% to 2.0% magnesium, and from 0.1% to 9.5% silicon as the essential elements; cold-rolling, if necessary; heat-treating, in which heating at a temperature of from 400°C to 580°C for the period of from 5 minutes or less is followed by rapid cooling at a rate of 10°C/second or more down to a temperature of 150°C or less; and finally cold-rolling at a rolling degree of 30% or more; said process also comprises after the heat-treating step but not after the finally cold--rolling step, a low-temperature holding step of holding an aluminum alloy sheet at a temperature of from 80°C to 150°C.
Claim 6
Dependent Claim
52 words
A process according to claim 3, wherein the aluminum alloy contains from 0.3% to 1.5% manganese, from 0.5% to 2.0% magnesium, from 0.1% to 0.5% silicon, from 0.1% to 0.4% copper, and from 0.2% to 0.6% iron and is heated to a temperature of from 50.0°C to 580°C in said heat-treatment step.
Claim 7
Dependent Claim
30 words
A process according to claim 3, wherein in the hot-rolling, the starting temperature of rolling is from 500°C to 550°C and the finishing temperature of rolling is 240°C or less.
Claim 8
Dependent Claim
53 words
A process according to claim 3, wherein the aluminum alloy contains from 0.5% to 1.0% manganese, from 1.0% to 2.0% magnesium, from 0.1% to 0.5% silicon, from 0.1% to 0.4% copper, and from 0.3% to 0.7% iron and is heated to a temperature of from 400°C to 550°C in ti., heat treatment step.
Claim 9
Dependent Claim
42 words
A process according to claim 6, wherein said aluminum-alloy ingot is homogenized and then cooled to a temperature of from 460°C to 540°C, and the hot rolling is initiated at said temperature of from 460°C to 540°C when said cooling is completed.
Claim 10
Dependent Claim
141 words
A process for producing a cold-rolled aluminum-alloy sheet for forming, which successively comprises the steps of: hot-rolling an aluminum-alloy ingot which contains from 0.1% to 2.0% manganese, from 0.1% to 2.0% magnesium, and from 0.1% to 0.5% silicon as essential elements; cold-rolling, if necessary; heat-treating, in which heating at a temperature of from 400°C to 580°C for the period of from 5 minutes or less is followed by rapid cooling at a rate of 10°C/second or more down to a temperature of 150°C or less; and finally cold-rolling at a rolling degree of 30% or more; said process also comprises after the heat-treating step but not after the finally cold--rolling step, a low-temperature holding step of holding an aluminum-alloy sheet to a temperature of from 80°C to 150°C, and heating said finally cold-rolled sheet to a temperature of 250°C or less.
Claim 11
Dependent Claim
141 words
A process for producing a cold-rolled aluminum-alloy sheet for forming, which successively comprises the steps of: hot-rolling an aluminum-alloy ingot which contains from 0.1% to 2.0% manganese, from 0.1% to 2.0% magnesium, and from 0.1% to 0.5% silicon as essential elements; cold-rolling, if necessary; heat-treating, in which heating at a temperature of from 400°C to 580°C for the period of from 5 minutes or less is followed by rapid cooling at a rate of 10°C/second or more down to a temperature of 150°C or less; and finally cold-rolling at a rolling degree of 30% or more; said process also comprises after the heat-treating step but not after the finally cold--rolling step, a low-temperature holding step of holding an aluminum-alloy sheet to a temperature of from 80°C to 150°C, and heating said finally cold-rolled sheet to a temperature of 250°C or less.
References Cited (Backward Citations)
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