Rolling method of pop-top can pull-tab material

A technology of pop cans and rough rolling, which is applied in the direction of metal rolling, can solve the problems of unstable quality, low elongation, uneven tensile strength, etc., and achieve the effect of broad market prospects, excellent performance and significant economic benefits

Active Publication Date: 2015-01-21
HENAN MINGTAI AL INDUSTRIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the hot-rolled 5182 pop can ring pull material is mainly provided by hot-rolled billets. The traditional cast-rolled strip can no longer be produced, and the use of imported materials has disadvantages such as unstable quality, single product, and high price.
The 5182 aluminum alloy belongs to the deformed aluminum alloy, which cannot be strengthened by heat treatment. It cannot be strengthened by solid solution + aging. It often has problems such as cracking during punching, high ear making rate, uneven tensile strength, and low elongation. Therefore, , How to improve the strength of the hot-rolled 5182 pop can ring pull material, improve the uniformity of internal components, strengthen and refine the grain size of the structure, and improve and improve the deep drawing performance have become the main factors that limit the development of this product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for rolling a pop can ring-pull material is realized by the following steps:

[0025] (1) Ingot casting according to the following chemical composition: Si 0.1-0.15%, Fe 0.2-0.3%, Cu 0.03-0.07%, Mn 0.2-0.4%, Mg 4.4-4.8%, Cr<0.1%, Ti 0.02-0.03%, the balance is Al, if there are impurities, the content of individual impurities is required to be less than 0.05%, and the total impurity content is less than 0.15%;

[0026] (2) Face milling of ingot: the amount of face milling on one side ≥ 20mm, the amount of face milling on one side ≥ 10mm, and the thickness difference between the two sides of the ingot ≤ 3mm;

[0027] (3) Ingot heating: the first stage furnace gas temperature is 520-540°C, the ingot temperature is 480-490°C, and the holding time is 14-18 hours; the second stage furnace gas temperature is 530-550°C, the ingot temperature The temperature is 510-520°C, the holding time is 2-4 hours; the temperature of the furnace is 490-500°C;

[0028] (4) Hot rolli...

Embodiment 2

[0033] The present embodiment is no longer repeated with the same part of embodiment 1, and the difference is:

[0034] (1) Chemical composition: Si 0.1%, Fe 0.2%, Cu 0.03%, Mn 0.2%, Mg 4.4%, Cr 0.05%, Ti 0.02%, and the balance is Al. If there are impurities, the content of individual impurity components is required to be <0.05 %, total impurity content <0.15%;

[0035] (2) Ingot heating: in the first stage, the furnace gas temperature is 530°C, the ingot temperature is 485°C, and the holding time is 14 hours; in the second stage, the furnace gas temperature is 540°C, the ingot temperature is 515°C, and the holding time is 3 hours; the temperature out of the furnace is 495°C;

[0036] (3) Rough rolling is divided into 17 passes, and the pass distribution is 475→ 460→ 440→ 415→ 385→ 355→ 320→ 285→ 250→ 215→ 180→ 150→ 120→ 90→ 70→ 50→ 38→ 27 mm , and after the 14th rolling, carry out head cutting and hemming; then carry out finish rolling, and roll to 7mm after 3 passes, and t...

Embodiment 3

[0040] The present embodiment is no longer repeated with the same part of embodiment 1, and the difference is:

[0041] (1) Chemical composition: Si 0.13%, Fe 0.25%, Cu 0.05%, Mn 0.3%, Mg 4.6%, Cr 0.08%, Ti 0.025%, and the balance is Al. If there are impurities, the content of individual impurity components is required to be <0.05 %, total impurity content <0.15%;

[0042] (2) Ingot heating: in the first stage, the furnace gas temperature is 540°C, the ingot temperature is 490°C, and the holding time is 18 hours; in the second stage, the furnace gas temperature is 550°C, the ingot temperature is 520°C, and the holding time is 4 hours; the temperature out of the furnace is 500°C;

[0043] (3) Rough rolling is divided into 21 passes, and the passes are allocated as 480→ 465→ 445→ 425→ 400→ 375→ 350→ 325→ 300→ 270→ 240→ 215→ 190→ 170→ 150→ 130→ 110→ 90→ 75→ 60→ 45→ 35 mm, and after the 18th rolling, the head is cut and edge rolled; then the finish rolling is carried out, and th...

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Abstract

The invention relates to a rolling method of aluminium alloy material, in particular to a rolling method of pop-top can pull-tab material. The rolling method comprises the steps: ingoting the aluminium alloy which contains the chemical constituents of Si, Fe, Cu, Mn, Mg, Cr, Ti and the balance of Al, and then conducting the processes of face milling, heating, hot rolling, cold rolling, finishing and foil rolling to the ingot to prepare 0.21-0.35mm pop-top can pull-tab material. The rolling method disclosed by the invention is scientific in formula, and reasonable and normative in process design, and solves the problems of cracking of the material in the rolling process, high earing ratio, uneven tensile strength and low ductility of the material. The material obtained by adopting the rolling method has a tensile strength of 360-420 MPa, the ductility of the material is larger than 70%, and the earing ratio is equal to or less than 3%. The material can be widely applied for the pull-tabs of various pop-top cans both at home and abroad, and can satisfy the requirement for high quality of the enterprises. Therefore, the rolling method has a broad market prospect and obvious economic benefit.

Description

technical field [0001] The invention relates to a rolling method of an aluminum alloy material, in particular to a rolling method of a pop-top can ring-pull material. Background technique [0002] At present, pop can beverages are widely liked by people because of the advantages of easy drinking, easy recycling of pop cans and no pollution. For more than half a century, pop-top cans have been continuously introduced, and as the only moving part on the can, the pull ring is undoubtedly the most important. The 5-series aluminum alloy has good plasticity, weldability, corrosion resistance and other comprehensive properties, so it is widely used in aerospace, ships, manufacturing automobiles, civilian food packaging, can lid rings and other fields. At present, the hot-rolled 5182 pop can ring pull material is mainly provided by hot-rolled billet, the traditional cast-rolled strip can no longer be produced, and the use of imported materials has disadvantages such as unstable qua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21H1/06C22C21/08
Inventor 李国锋
Owner HENAN MINGTAI AL INDUSTRIAL CO LTD
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