Forged aluminum alloy for automobiles
A technology of aluminum alloy and forging materials, which is applied in the field of aluminum alloy forging materials for automobiles, can solve problems such as insufficient strength, unsuitable manufacturing conditions, and no description of cooling treatment, etc., and achieve excellent corrosion resistance and high strength. Effect
Active Publication Date: 2017-06-27
KOBE STEEL LTD
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Problems solved by technology
[0019] However, the inventions described in Patent Documents 1 to 3 relate to thin-walled structures such as aluminum window frames for construction, and the manufacturing conditions are not suitable as Al alloy forged materials for automobiles. material, it cannot be said to have sufficient strength
[0020] In addition, the inventions described in Patent Documents 1 to 3 all carry out the first stage of artificial aging treatment and the second stage of artificial aging treatment, but in each document, it is not described whether cooling treatment is performed after the first stage of artificial aging treatment
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[0032] [Aluminum alloy forging materials for automobiles]
[0033] Hereinafter, the form of the aluminum alloy forging material for automobiles (hereinafter simply referred to as "forging material") for carrying out the present invention will be described in detail.
[0034] The forging material of the present invention contains Mg: 0.70 to 1.50% by mass, Si: 0.60 to 1.50% by mass, Cu: 0.20 to 0.70% by mass, and Ti: 0.001 to 0.100% by mass. In addition, the forged material of the present invention contains two or more of Mn: 0.01 to 0.80% by mass, Cr: 0.10 to 0.30% by mass, and Zr: 0.05 to 0.25% by mass. The balance of the forged material of the present invention is Al and unavoidable impurities.
[0035] Furthermore, in the forged material of the present invention, the number density of needle-shaped precipitates having a circle-equivalent diameter of 2 to 10 nm is 30,000 / μm in the observation surface (TEM image) of a transmission electron microscope (Transmission Electron M...
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Abstract
It is an object to provide a forged aluminum alloy for automobiles having a high strength. The forged aluminum alloy for automobiles contains Mg: 0.70-1.50 mass %, Si: 0.60-1.50 mass %, Cu: 0.20-0.70 mass %, and Ti: 0.001-0.100 mass %, and contains two elements or more out of Mn: 0.01-0.80 mass %, Cr: 0.10-0.30 mass % and Zr: 0.05-0.25 mass %, the balance being Al and inevitable impurities, in which the number density of acicular precipitates 1 having the circle equivalent diameter of 2-10 nm is 30,000 pieces / mum3 or more.
Description
technical field [0001] The invention relates to an aluminum alloy forging material for automobiles. Background technique [0002] The 6000 series aluminum (Al) alloy specified by JIS has good strength and corrosion resistance, so it is suitable for ships, vehicles, land structures, buildings, guardrails, home appliances, bus lines, electric wires, machinery, auto parts, etc. The material used for the structure. [0003] In recent years, in Al alloy forged materials for automobiles such as vehicles and auto parts (Al alloy forged materials for automobiles), weight reduction is strongly desired for reasons such as reducing vehicle weight and improving fuel efficiency. Higher strength is required to reduce the weight of Al alloy forged materials for automobiles, and the development of such materials is strongly desired. Techniques that can meet this requirement are disclosed in Patent Documents 1 to 3, for example. [0004] In Patent Document 1, an artificial aging treatment...
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IPC IPC(8): C22C21/02C22C21/08C22C21/16C22F1/043C22F1/047C22F1/05C22F1/057
CPCC22C21/02C22C21/08C22C21/14C22C21/16C22F1/043C22F1/047C22F1/05C22F1/057C01P2004/10C01P2004/04B21J5/02
Inventor 堀雅是
Owner KOBE STEEL LTD