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Aluminum alloy plate for can lids

A technology for aluminum alloy plates and can lids, applied in the field of aluminum alloy plates for easy-open can lids, can solve problems such as pile cracks and uncontrollable necking, and achieve excellent can openability, excellent rivet formability, and rivet formability. excellent effect

Inactive Publication Date: 2016-10-12
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, even if cracks do not occur during rivet forming, if necking occurs, there is a possibility of cracks during staging (processing of knocking the rivet to destroy it in order to attach the tab to the cap).
Furthermore, in the prior art, necking during rivet forming cannot be controlled, and better rivet formability that suppresses necking is required.

Method used

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  • Aluminum alloy plate for can lids
  • Aluminum alloy plate for can lids
  • Aluminum alloy plate for can lids

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Effect test

no. 1 approach ＞

[0024] First, an aluminum alloy plate for a can end according to one embodiment (hereinafter also referred to as the first embodiment) of the present invention and its manufacturing method will be described in detail.

[0025] The aluminum alloy plate for can ends according to the first embodiment of the present invention is characterized by containing Mg: 3.8 to 5.5% by mass, Fe: 0.1 to 0.5% by mass, Si: 0.05 to 0.3% by mass, and Mn: 0.01 to 0.6% by mass %, Cu: 0.3% by mass or less, the balance is composed of Al and unavoidable impurities, and the number density of intermetallic compounds with an equivalent circle diameter of 10 nm or more and 300 nm or less is 80 pieces / μm 3 Hereinafter, the area ratio of the intermetallic compound having an equivalent circle diameter of more than 300 nm is 0.3% or more and 2.0% or less.

[0026] (composition of aluminum alloy)

[0027] Mg: 3.8 to 5.5% by mass

[0028] Mg has an effect of improving the strength of the aluminum alloy plate....

no. 2 approach ＞

[0053] Next, an aluminum alloy plate for a can end according to another embodiment (hereinafter, also referred to as a second embodiment) of the present invention and its manufacturing method will be described in detail.

[0054] The aluminum alloy plate for can ends according to the second embodiment of the present invention is characterized in that the aluminum alloy plate contains Mg: 3.8 to 5.5% by mass, Fe: 0.1 to 0.5% by mass, Si: 0.05 to 0.3% by mass, Mn Cu: 0.01 to 0.6% by mass, Cu: 0.06 to 0.3% by mass or less, the balance is composed of Al and unavoidable impurities, the Cu solid solution concentration is 0.06% by mass or more, and the area ratio of intermetallic compounds with an equivalent circle diameter of more than 300nm It is 0.3% or more and 2.0% or less.

[0055] (composition of aluminum alloy)

[0056] In the composition of the aluminum alloy of the aluminum alloy plate for can ends of the second embodiment, Mg (3.8 to 5.5 mass %), Fe (0.1 to 0.5 mass %), S...

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Abstract

The purpose of the present invention is to provide an aluminum alloy plate for can lids, which achieves excellent rivet formability without lowering the material strength. One embodiment of the present invention provides an aluminum alloy plate for can lids, which contains 3.8-5.5% by mass of Mg, 0.1-0.5% by mass of Fe, 0.05-0.3% by mass of Si, 0.01-0.6% by mass of Mn and 0.3% by mass or less of Cu, with the balance made up of Al and unavoidable impurities, and which is characterized in that: the number density of intermetallic compounds having circle-equivalent diameters of from 10 nm to 300 nm (inclusive) is 80 compounds / [Mu]m3 or less; and the area ratio of intermetallic compounds having circle-equivalent diameters of more than 300 nm is from 0.3% to 2.0% (inclusive).

Description

technical field [0001] The present invention relates to an aluminum alloy plate for can ends, and particularly relates to an aluminum alloy plate for easy-open can ends with a good balance between material strength and rivet formability. Background technique [0002] The properties required for aluminum alloy sheets for can ends include formability against end processing, compressive strength against internal pressure after beverage filling, and can openability for normal and easy opening. [0003] On the other hand, in recent years, from the viewpoint of cost reduction, there has been a demand for thinner aluminum alloy sheets for can ends. However, reducing the thickness of the aluminum alloy plate reduces the compressive strength of the can end. As one of the methods of suppressing the decrease in the compressive strength of the can end, it is conceivable to increase the strength of the aluminum alloy itself, but there is a problem that the formability is lowered along w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/06C22F1/047
CPCC22F1/047C22C21/06
Inventor 田中友己有贺康博山口正浩
Owner KOBE STEEL LTD
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