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Aluminum alloy plate for can lid and manufacturing method thereof

A technology of aluminum alloy plate and manufacturing method, applied in the direction of metal rolling, container, rigid container, etc., can solve the problems of limited ear-making rate control, ear-making control, etc., and achieve easy control, small anisotropy, and high strength Effect

Active Publication Date: 2017-11-21
FURUKAWA SKY ALUMINUM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of omitting the intermediate annealing process, ear control cannot be performed by changing the heat treatment conditions (temperature, time) of the intermediate annealing, the cold rolling ratio before the intermediate annealing, the cold rolling ratio after the intermediate annealing, etc. Limited control of ear removal rate

Method used

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  • Aluminum alloy plate for can lid and manufacturing method thereof
  • Aluminum alloy plate for can lid and manufacturing method thereof
  • Aluminum alloy plate for can lid and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0073] [Example 1: Invention Example 1 to Invention Example 17 and Comparative Example 1 to Comparative Example 7]

[0074] Aluminum alloys with the compositions shown in Table 1 were cast by the DC casting method, and the obtained ingot was subjected to a homogenization treatment at 490°C for 1 hour, followed by hot rough rolling with a reversing hot roughing mill, and then four-stage The tandem hot finishing mill implements hot finishing rolling. Hot rough rolling was performed at a starting temperature of 485°C. In addition, the hot finish rolling was started at a material temperature of 440°C (±5°C), with a total reduction rate of 90.7%, and a strain rate of 90sec for the final finish rolling pass. -1 To carry out hot finish rolling, the coil temperature on the side where the material is sent out is controlled at 345°C (±5°C). Thereafter, cold rolling was performed at a final cold rolling ratio of 90%, coating with an epoxy-based paint, and firing treatment at 260° C.×20...

Embodiment 2

[0105] [Example 2: Invention Example 18 to Invention Example 26 and Comparative Example 8 to Comparative Example 18]

[0106] Aluminum alloys corresponding to alloy M, alloy K, and alloy O of the present invention in Table 1 are cast by DC casting, and the obtained ingots are subjected to homogenization treatment, hot rolling, and cold casting under the manufacturing conditions shown in Table 3. After rolling, it is painted with an epoxy-based paint and fired at 260°C for 20 sec. In addition, Comparative Example 15 in Table 3 is a comparative example in which hot finish rolling is performed by a reversing rolling mill, and Comparative Example 17 is a continuous annealing line (Continuous Annealing Line, CAL) that performs rapid heating and rapid cooling after hot rolling. comparative example.

[0107] [table 3]

[0108]

[0109] With respect to the aluminum alloy plate for can ends obtained as described above, the resistance after coating and firing and the selvage rate w...

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Abstract

Provided are: an aluminum alloy plate for can ends, which is an aluminum alloy material suitable for can ends and has high strength, a small strength anisotropy and a low earing ratio; and a method for manufacturing the aluminum alloy plate at low cost. An ingot of an alloy is subjected to a homogenization treatment at 450 to 530˚C inclusive for 0.5 to 15 hours inclusive, and subsequently the homogenized ingot is subjected to a hot rolling procedure, wherein the alloy comprises, in mass%, 0.01 to 0.2% inclusive of Si, 0.01 to 0.35% inclusive of Fe, 0.01 to 0.15% inclusive of Cu, 0.2% or more and less than 0.5% of Mn, 4.0% or more and less than 5.5% of Mg and a remainder made up by Al and unavoidable impurities, and wherein the hot rolling is carried out in such a manner that the total rolling reduction ratio in the hot finish rolling becomes 88 to 94% inclusive, the strain rate during the final pass becomes 60 to 130 sec-1 inclusive and the finishing temperature becomes 310 to 370˚C inclusive. Subsequently, the resultant product is subjected to a cold rolling procedure at a cold rolling reduction ratio of 84 to 94% inclusive without carrying out annealing until the thickness of a final product reaches a final thickness, whereby the final product having the final thickness is produced.

Description

technical field [0001] The present invention relates to an aluminum alloy plate for a can lid used for beverage cans and a manufacturing method thereof. Background technique [0002] As aluminum alloys for can ends, Japanese Industrial Standards (JIS) 5082 alloy (Al-4.5Mg alloy), 5182 alloy (Al-4.5Mg- 0.35Mn alloy), or 5052 alloy (Al-2.5Mg-0.25Cr alloy) and other Al-Mg alloys. In addition, as a can lid material for cans such as beer cans and carbonated beverage cans, which are subjected to internal pressure (positive internal pressure: so-called positive pressure), from the viewpoint of compressive strength, among these alloys, the 5182 alloy, which is particularly strong, is often used. Material. [0003] In the production of the above-mentioned can ends, a circular can end raw material plate is punched out from a predetermined aluminum alloy plate for can ends, and shaped to produce a can end. First, with regard to the aluminum alloy plate for can lids, an ingot with a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/06B21B3/00B65D1/00C22F1/047C22F1/00
CPCC22C21/06B21B2003/001B21B2265/14
Inventor 大场建穂铃木覚
Owner FURUKAWA SKY ALUMINUM CORP
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