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Hot rolling aluminium alloy for bottle cap material and producing method thereof

A production method and technology of aluminum alloy, applied in metal rolling and other directions, can solve the problems of high ear rate, uneven tensile strength, etc., and achieve the effects of improving production efficiency, reducing material consumption and energy consumption, and achieving excellent performance.

Inactive Publication Date: 2009-03-18
HENAN MINGTAI AL INDUSTRIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems in the prior art such as high ear-making rate and uneven tensile strength when the bottle cap material is punched, and these problems are expected to be solved

Method used

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  • Hot rolling aluminium alloy for bottle cap material and producing method thereof

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Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1. An aluminum alloy for bottle cap material, expressed in parts by weight, the ingredients are shown in Table 2, and the total of each ingredient is 100 parts. If there are impurities, the content of individual impurity components is required to be less than 0.03 parts, and the total impurity content to be less than 0.10 parts.

[0024] The production method of aluminum alloy for bottle cap material comprises the following steps:

[0025] (1) Smelting: add various components to the melting furnace by weight, melt at 720-740°C, and cast aluminum alloy ingots at 715-725°C after all the charge is melted;

[0026] (2) Ingot face milling: milling the aluminum alloy ingot, requiring a single-sided milling amount ≥ 15mm, the thickness difference between the two sides of the ingot ≤ 3mm, and the roughness of the milling surface required to be 0.06-0.15mm;

[0027] (3) Ingot heating: heat the aluminum alloy ingot after face milling to 540-560°C, heat it for 6-10 hou...

Embodiment 2

[0036] Embodiment two, the aluminum alloy composition of bottle cap material is shown in Table 2, and its production method is no longer repeated with the same part as embodiment one, and the difference is:

[0037] (1) Melting: The charge composition is smelted at 730°C, and when the charge is completely melted, it is cast into an aluminum alloy ingot at 720°C;

[0038] (2) Ingot heating: heat the aluminum alloy ingot after face milling to 545°C, hold it for 8 hours, and release it from the furnace; the furnace temperature is 510°C;

[0039] (3) Cold rolling and finishing: when rolling to 1.2mm, intermediate annealing is carried out, and the intermediate annealing is degreased at a furnace temperature of 245°C for 6 hours; then at a furnace temperature of 450°C, it is kept for 13 hours; When the temperature is 405°C, keep it warm for 2 hours, then take it out of the furnace and cool it in air; when the rolling reaches 0.46mm, then perform intermediate annealing, the method is...

Embodiment 3

[0040] Embodiment three, the aluminum alloy composition of bottle cap material is shown in Table 2, and its production method is no longer repeated with the same part as embodiment one, and the difference is:

[0041] (1) Smelting: The charge composition is smelted at 735°C, and when the charge is completely melted, it is cast into an aluminum alloy ingot at 720°C;

[0042] (2) Ingot heating: heat the aluminum alloy ingot after face milling to 560°C, keep it warm for 6 hours, and release it from the furnace; the furnace temperature is 515°C;

[0043] (3) Cold rolling and finishing: when rolling to 1.2mm, intermediate annealing is carried out, and the intermediate annealing is degreased at a furnace temperature of 250°C for 6 hours; then at a furnace temperature of 450°C, it is kept for 13 hours; When the temperature is 405°C, keep it warm for 2 hours, and cool it out of the furnace; when rolling to 0.46mm, perform intermediate annealing, the method is the same as the first tim...

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Abstract

The invention relates to an aluminum alloy for a hot-rolling bottle cap material and a manufacturing method thereof. The compositions of the aluminum alloy are silicon, iron, copper, manganese, magnesium, chromium, zinc, titanium and the balance being aluminum, and the total amount is 100 portions. The manufacturing method comprises the following steps: cast ingots are cast at a temperature of between 715 and 725 DEG C during the manufacturing process; surfaces of the cast ingots are milled; the cast ingots of the aluminum alloy are heated to a temperature of between 540 and 560 DEG C and kept for 6 to 10 hours; the cast ingots are rolled for a plurality of passes and roughly rolled until the thickness of the cast ingots is between 30 and 40 millimeters; the cast ingots undergo four-tandem rolling until the thickness of the cast ingots is 4 millimeters; and when the cast ingots undergo cold rolling and final finish and are rolled from 4 millimeters to between 1.2 and 0.46 millimeters, intermediate annealing is respectively performed for two times, and finally the cast ingots are rolled into the finished product with the thickness between 0.19 and 0.23 millimeter. The earing rate of the aluminum alloy is less than or equal to 2 percent; the strength of the aluminum alloy is between 140 and 160 MPa; the elongtation percentage of the aluminum alloy is more than or equal to 3 percent; and the product has stable performance and is favorable for improving the production efficiency. The aluminum alloy for the bottle cap material is widely used for bottle caps of containers such as various winebottles, beverage bottles, medicine bottles and so on, and can meet the high-quality requirement of bottle cap processing enterprises at home and abroad on the variety.

Description

1. Technical field: [0001] The invention relates to an aluminum alloy and a production method thereof, in particular to an aluminum alloy for hot-rolled bottle cap material and a production method thereof. 2. Background technology: [0002] Aluminum bottle caps are mostly processed in a production line with a high degree of automation, so the requirements for the strength, elongation and dimensional deviation of the material are very strict, otherwise cracks or creases will occur during processing. In order to ensure the convenience of printing after the bottle cap is formed, the surface of the bottle cap material is required to be flat, without rolling marks, scratches and stains. The alloys generally used are 8011-H14, 3003-H16, etc., and the thickness of the material specifications is generally 0.20- 0.23mm, width 449-796mm. The production of aluminum bottle cap materials can be made by hot rolling or continuous casting and rolling, respectively, and then rolled by cold ...

Claims

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Application Information

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IPC IPC(8): C22C21/00B23P17/00B21B1/22
Inventor 邵小伟
Owner HENAN MINGTAI AL INDUSTRIAL CO LTD
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