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Homogenization heat treatment method of aluminum alloy ingot casting for pop-top can body

A technology of aluminum alloy ingot and heat treatment method, which is applied in the field of heat treatment of aluminum alloy ingot, can solve the problems of leaky tank, thick, broken, etc., and achieve the effect of significant size reduction, elimination of component segregation, and diffusion elimination

Active Publication Date: 2008-08-06
中铝西南铝板带有限公司
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Problems solved by technology

The traditional homogenization heat treatment technology can dissolve the dissociated eutectic structure to a certain extent, but cannot completely eliminate the coarse and unevenly distributed precipitates.
Coarse precipitates not only reduce the life of deep drawing forming tools, but also easily cause defects such as tank leaks and fractures during deep drawing forming

Method used

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  • Homogenization heat treatment method of aluminum alloy ingot casting for pop-top can body
  • Homogenization heat treatment method of aluminum alloy ingot casting for pop-top can body
  • Homogenization heat treatment method of aluminum alloy ingot casting for pop-top can body

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Embodiment Construction

[0013] In the present invention, the homogenization process of AA3104 aluminum alloy is adopted, and the alloy composition is (wt%): Si: 0.20, Fe: 0.52, Cu: 0.18, Mn: 1.02, Mg: 1.23; other elements are not more than 0.05 individually, and the sum is not Greater than 0.15; the balance is Al.

[0014] The ingots used are smelted in the same melting time, semi-continuous casting in the same casting time, face milling, and different homogenization treatments and heat treatments for controlling precipitated phases are carried out in a pusher heating furnace with a cooling device. The precipitated phase size in the embodiment of the adopted high temperature homogenization and controlled cooling is shown in Table 1, wherein the particle size is according to the equivalent circle radius, i.e. R = S / π To calculate, S is the area occupied by the particles in the metallographic photograph.

[0015] Example num...

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Abstract

The invention discloses an aluminum alloy cast ingot uniform heat treatment method of tin pot body, which comprises the following steps: (1)making mass percent of alloy as 0.20 Si, 0.52 Fe, 0.18 Cu, 1.02 Mn and 1.23 Mg; setting the other single element not bigger than 0.05 and major total not bigger than 0.15; making the surplus as Al; casting the tin pot body with aluminum alloy; proceeding high-temperature uniform treatment in propulsion heating furnace with cooling device; controlling the temperature at 550-620 deg.c and keeping temperature time at 12-24h; forced-cooling to 460-500 deg.c with cooling speed at 20-60 deg.c / h; (2) controlling heat treatment of evolution phase in the same heating furnace; controlling the temperature at 450-500 deg.c and time at 6-12 h. This invention provides support for high quality production of AA3104 aluminum alloy sheet.

Description

technical field [0001] The invention relates to a heat treatment method for aluminum alloy ingots, in particular to a homogenization heat treatment method for aluminum alloy ingots for can bodies. technical background [0002] The industrial production of aluminum alloy sheets for cans includes processes such as melting and casting-milling-homogenization treatment-hot rolling-cold rolling. As the weight of pop cans is getting lighter and lighter, the thickness of the aluminum alloy plate used for the aluminum alloy pop can body is required to be thinner and thinner. However, coarse dissociated eutectic crystal phase (second phase, or precipitated phase) and segregation of Mn elements are easily formed in the semi-continuous ingot of this type of aluminum alloy. Homogenization heat treatment technology is an important process to improve the precipitated phase structure. The traditional homogenization heat treatment technology can dissolve the dissociated eutectic structure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/04C22C21/06C21D1/26
Inventor 张新明肖亚庆赵世庆邓远来黄平郭金龙卢敬华
Owner 中铝西南铝板带有限公司
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