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Aluminum alloy sheet for press forming, process for manufacturing same, and press-formed product thereof

A technology for stamping and forming aluminum alloy plates, applied in the field of aluminum alloy plates for stamping forming, can solve problems such as difficulty in fully meeting requirements, and achieve the effects of excellent wrinkle resistance and small ear production rate

Inactive Publication Date: 2015-11-25
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the technologies disclosed in the above-mentioned patent documents, it is difficult to fully satisfy such requirements

Method used

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  • Aluminum alloy sheet for press forming, process for manufacturing same, and press-formed product thereof
  • Aluminum alloy sheet for press forming, process for manufacturing same, and press-formed product thereof
  • Aluminum alloy sheet for press forming, process for manufacturing same, and press-formed product thereof

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no. 1 approach

[0079] The first embodiment of the method for producing an Al alloy sheet for press forming according to the present invention is characterized by performing the following steps in order: Si: 0.4 to 1.5% by mass, Mg: 0.3 to 1.0% by mass, and the balance is composed of A1 and A casting process of casting the A1 alloy composed of unavoidable impurities; a homogenization heat treatment process of performing a homogenization heat treatment on the ingot of the A1 alloy; performing hot rolling under the condition that the end temperature of the hot rolling is 300° C. or less The hot rolling step; the annealing step of annealing at a temperature of 300 to 500°C; the cold rolling step of cold rolling at a cold rolling end temperature of 100°C or lower; the solution treatment step of treating at a temperature of 500°C or higher; and, A heating step of heating to a temperature of 70° C. or higher.

[0080] In the first embodiment of the method for producing an A1 alloy sheet for press f...

no. 2 approach

[0101] The second embodiment of the method for producing an Al alloy sheet for press forming of the present invention is characterized by performing the following steps in order: for Si: 0.4 to 1.5% by mass, Mg: 0.3 to 1.0% by mass, and the balance is composed of A1 and A casting process of casting the A1 alloy composed of unavoidable impurities; a homogenization heat treatment process of performing a homogenization heat treatment on the ingot of the A1 alloy; a hot rolling process of performing hot rolling; The first cold rolling process of cold rolling; the intermediate annealing process of intermediate annealing at a temperature of 300 to 500°C; the second cold rolling process of cold rolling at a temperature of 100°C or less at the end of cold rolling; the temperature of 500°C or higher a solution treatment step of treatment; and a heating step of heating to a temperature of 70° C. or higher.

[0102] In the second embodiment of the method for producing an A1 alloy sheet f...

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Abstract

The present invention provides an aluminum alloy sheet for press forming, said aluminum alloy sheet being made of an aluminum alloy that contains 0.4 to 1.5 mass% of Si and 0.3 to 1.0 mass% of Mg with the balance being Al and unavoidable impurities and exhibiting a ratio (P(%)) of ΔL to L0 of 2.0% or less [wherein: L0 is the length of a diagonal line lying at an angle of 0º to the rolling direction in an indentation formed by a Vickers hardness tester; and ΔL is a difference between L0 and the length (L45) of a diagonal line lying at an angle of 45º to the rolling direction therein]. Further, the present invention provides a process for manufacturing the aluminum alloy sheet and a press-formed product thereof.

Description

technical field [0001] The present invention relates to an aluminum alloy sheet for press forming used in press forming, a method for producing the same, and a press formed body thereof. Background technique [0002] In order to reduce the weight of transportation machinery such as automobiles, lighter aluminum alloy materials have been developed as exterior materials instead of steel materials that have been used until now, and their practical use is advancing. [0003] Among aluminum alloys (hereinafter, also referred to as "A1 alloy"), A1-Mg, which is excellent in strength and corrosion resistance, has been studied as a raw material for automotive exterior panels such as body, door, and fender. -Si-based 6000-series A1 alloy. [0004] Automobile exterior parts are generally formed by press forming, so A1 alloy sheet materials are required to have excellent press formability. In Patent Documents 1 and 2, such an A1 alloy material for automobile exteriors is studied from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/06C22F1/05C22F1/00
CPCC22C21/08C22C21/02C22C21/10C22F1/05C22F1/043C22C21/00
Inventor 中村贵彦增田哲也
Owner KOBE STEEL LTD
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