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Preparation technology for removing cross grain from surface of 5xxx aluminum alloy sheet

An aluminum alloy sheet and preparation process technology, applied in the field of aluminum alloys, can solve the problems affecting the surface quality of the sheet, prone to horizontal lines, etc., and achieve the effects of better sheet surface quality, improved surface quality, and broad application prospects.

Inactive Publication Date: 2018-12-21
TIANJIN ZHONGWANG ALUMINUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, in order to solve the problem that horizontal stripes are prone to appear on the surface of the 5-series aluminum alloy sheet prepared by the existing process, which affects the surface quality of the sheet, the present invention provides a preparation process for eliminating the horizontal stripes on the surface of the 5-series aluminum alloy sheet

Method used

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  • Preparation technology for removing cross grain from surface of 5xxx aluminum alloy sheet
  • Preparation technology for removing cross grain from surface of 5xxx aluminum alloy sheet
  • Preparation technology for removing cross grain from surface of 5xxx aluminum alloy sheet

Examples

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Effect test

Embodiment 1

[0025] A preparation process for eliminating horizontal lines on the surface of 5-series aluminum alloy plates, taking the finished product 3mm as an example, includes the following steps:

[0026] A. Prepare aluminum alloy raw materials according to the following ratios by weight: Si 0.141%, Fe 0.27%, Cu 0.011%, Mn 0.236%, Mg 2.911%, Cr 0.091%, Zn 0.007%, Ti 0.016%, and other single impurities ≤ 0.05%, the total amount of impurities ≤0.15%, and the balance Al, the prepared aluminum alloy raw materials are added to the melting furnace and mixed evenly, and then smelted into liquid aluminum alloy. The melting temperature is 745°C. ;

[0027] B. Pour the liquid aluminum alloy after stirring and removing slag in step A into a refining furnace for refining for 15 minutes. The refining temperature is 730°C. Stir and remove slag after refining the liquid aluminum alloy. Pass high-purity argon into the melt of the refining furnace and stir the melt, use high-purity argon to remove i...

Embodiment 2

[0030] A preparation process for eliminating horizontal lines on the surface of 5-series aluminum alloy plates, taking the finished product 3mm as an example, includes the following steps:

[0031] A. Prepare aluminum alloy raw materials according to the following ratios by weight: Si 0.141%, Fe 0.27%, Cu 0.011%, Mn 0.236%, Mg 2.911%, Cr 0.091%, Zn 0.007%, Ti 0.016%, and other single impurities ≤ 0.05%, the total amount of impurities ≤0.15%, and the balance Al, the prepared aluminum alloy raw materials are added to the melting furnace and mixed evenly, and then smelted into liquid aluminum alloy. The melting temperature is 745°C. ;

[0032] B. Pour the liquid aluminum alloy after stirring and removing slag in step A into a refining furnace for refining for 15 minutes. The refining temperature is 730°C. Stir and remove slag after refining the liquid aluminum alloy. Pass high-purity argon into the melt of the refining furnace and stir the melt, use high-purity argon to remove i...

Embodiment 3

[0035] A preparation process for eliminating horizontal lines on the surface of 5-series aluminum alloy plates, taking the finished product 2mm as an example, includes the following steps:

[0036]A. Prepare aluminum alloy raw materials according to the following ratios by weight: Si 0.141%, Fe 0.27%, Cu 0.011%, Mn 0.236%, Mg 2.911%, Cr 0.091%, Zn 0.007%, Ti 0.016%, and other single impurities ≤ 0.05%, the total amount of impurities ≤0.15%, and the balance Al, the prepared aluminum alloy raw materials are added to the melting furnace and mixed evenly, and then smelted into liquid aluminum alloy. The melting temperature is 745°C. ;

[0037] B. Pour the liquid aluminum alloy after stirring and removing slag in step A into a refining furnace for refining for 15 minutes. The refining temperature is 730°C. Stir and remove slag after refining the liquid aluminum alloy. Pass high-purity argon into the melt of the refining furnace and stir the melt, use high-purity argon to remove im...

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Abstract

The invention belongs to the technical filed of aluminum alloy, and relates to a preparation technology for removing a cross grain from the surface of a 5xxx aluminum alloy sheet. The preparation technology comprises the steps of holding an aluminium alloy ingot after melt casting for 3-5h at 500+ / -5 DEG C, and then tapping off and rolling the aluminium alloy ingot; controlling the hot rolling finishing temperature to be 325+ / -10 DEG C, and reserving 10%-50% deformation between hot-rolled billets and a cold-rolled product; for a product with more than 50% deformation between the hot-rolled billets and the cold-rolled finished product, performing intermediate annealing for one time in the material cold-rolling process; reserving 10%-50% deformation after intermediate annealing of the sheet,and preforming recrystallization annealing to the cold-rolled product for 2-5h at 300-350 DEG C; and finally performing cross shear and parting off to obtain the aluminum alloy sheet. According to the technology, the cross grain on the surface of a 5xxx aluminum alloy O-state sheet is removed, and the surface quality of the sheet is improved effectively.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and relates to a preparation process for eliminating horizontal stripes on the surface of 5-series aluminum alloy plates. Background technique [0002] With social development and scientific and technological progress, the aluminum and aluminum alloy processing industry and technology have developed rapidly. 5XXX aluminum alloys are widely used in the fields of automobiles, ships and buildings because of their low density and good plasticity and corrosion resistance. . The application in some specific fields has extremely high requirements on the surface quality of the alloy. Sometimes, after the cold-rolled O-state annealing, the cross-sheared aluminum alloy sheet will have surface stripes, which will reduce the surface finish of the material and bring harm to the painting and other processes. It is difficult to come, which affects the subsequent processing and use of the alloy. Theref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C21/08C22F1/047B21B3/00
CPCB21B3/00B21B2003/001C22C1/026C22C21/08C22F1/047
Inventor 金雪马青梅张义杨直达李玉博陈金生郭富安秦俊杰张国文
Owner TIANJIN ZHONGWANG ALUMINUM IND CO LTD
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