Cold-rolled aluminum alloy sheet for bottle can with excellent neck part formability and process for producing the cold-rolled aluminum alloy sheet

A cold-rolled sheet and formability technology, applied in the field of aluminum alloy cold-rolled sheet, can solve problems such as easy wrinkles and cracks

Inactive Publication Date: 2008-09-17
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] However, only adjusting the composition and the yield point after baking of the aforementioned conventional 3000-series aluminum alloy plate, when making the side of the can material higher strength, the neck formed by the necking process or the spinning and shrinking process, And when forming the thread cutting forming part for screw cap installation on the outer periphery near the mouth after that, wrinkles and cracks tend to be more likely to occur

Method used

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  • Cold-rolled aluminum alloy sheet for bottle can with excellent neck part formability and process for producing the cold-rolled aluminum alloy sheet
  • Cold-rolled aluminum alloy sheet for bottle can with excellent neck part formability and process for producing the cold-rolled aluminum alloy sheet
  • Cold-rolled aluminum alloy sheet for bottle can with excellent neck part formability and process for producing the cold-rolled aluminum alloy sheet

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Embodiment

[0130] In addition to the aluminum base metal, can scraps are also used as melting raw materials, and the melting of Al alloys with the composition A to N shown in the following Table 1 (inventive examples: A to D, comparative examples E to N) was carried out. Melting was performed, and an ingot having a plate thickness of 600 mm and a width of 2100 mm was produced by the DC casting method. Also, the contents of elements indicated by "-" in Table 1 indicate below the detection limit.

[0131] In this ingot, as shown in Table 1, as the total amount of other elements, both the inventive example and the comparative example contain unavoidable impurity elements, and the total content of these elements contains Zr, Bi, Sn, Ga, V, Co, Ni, Ca, Mo, Be, Pb, and W are 0.03% or more.

[0132] Soaking treatment was performed on the ingots with these compositional compositions under the conditions shown in Tables 2 and 4. Here, the rate of temperature increase in the soaking treatment re...

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Abstract

A cold-rolled aluminum alloy sheet for bottle cans which has a composition containing 0.7-1.5 mass% Mn, 0.8-1.7 mass% Mg, 0.1-0.7 mass% Fe, 0.05-0.5 mass% Si, and 0.1-0.6 mass% Cu, with the remainder being Al and unavoidable impurities. In the structure, the number of dispersed particles having a size of 0.05-1 [mu]m, as determined through an examination with a TEM at a magnification of 5,000-15,000 diameters, is 50-400 per 300 mum<2>, the proportion of dispersed particles having a size of 0.3 mum or larger in these dispersed particles being 15-70% by number based on all these dispersed particles.

Description

technical field [0001] The present invention relates to an aluminum alloy cold-rolled sheet (bottle and can raw material sheet) excellent in the formability of the neck of the bottle and can as a can body material of the bottle and can (beverage can). In addition, the aluminum alloy cold-rolled sheet mentioned in the present invention is a cold-rolled (cold-rolled sheet) rolled by hot rolling-cold rolling. Hereinafter, the aluminum alloy is referred to as an Al alloy. Background technique [0002] As aluminum-based beverage cans, two-stage aluminum cans obtained by seaming a can body and a can end (can end) are often used. In aluminum cans with this two-stage structure, the mainstream is to perform can body forming such as deep drawing (cupping) and DI forming (cupping, shrinking) on ​​a predetermined aluminum plate to form a main body, and then perform cupping on the main body. The necking process is performed so that the diameter of the end portion is smaller than the di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/06C22C21/00C22F1/04
CPCC22C21/08C22F1/047C22C21/00C22C21/06
Inventor 梶原桂鹤田淳人
Owner KOBE STEEL LTD
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