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Preparation process of high-performance 7-series aluminum alloy sheet

A preparation process and technology of aluminum alloy, applied in the field of aluminum alloy manufacturing, can solve problems such as poor flatness of coils

Active Publication Date: 2020-03-27
TIANJIN ZHONGWANG ALUMINUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a high-performance 7-series aluminum alloy thin plate in order to solve the problems of poor performance uniformity in the width direction of the coil and poor flatness of the coil in the preparation of wide-width aluminum alloy coils by the existing rolling process. preparation process

Method used

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  • Preparation process of high-performance 7-series aluminum alloy sheet
  • Preparation process of high-performance 7-series aluminum alloy sheet

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0032] A preparation process for a high-performance 7-series aluminum alloy sheet, comprising the following steps:

[0033] A. Ingredients: The aluminum alloy raw materials for preparing 7-series aluminum alloy sheets are mixed according to weight percentage, namely:

[0034] element Si Fe Cu Mg mn Zn Cr Ni Ti Impurities Al content 0.06 0.12 1.84 2.54 0.04 5.9 0.22 0.04 0.02 0.1 margin

[0035] B. Melting and casting: Calculate the amount of each aluminum alloy raw material and transfer the prepared iron nuggets, copper nuggets, magnesium nuggets, industrial silicon nuggets and aluminum ingots into the smelting furnace to melt to a semi-melted state, add zinc ingots (the zinc ingots can Completely submerged to prevent burning) to remove slag, so that there is no obvious scum residue on the surface of the aluminum liquid. When the aluminum alloy raw material is completely melted, the alloy composition is tested, and when the com...

Embodiment 2

[0046] The difference between Example 2 and Example 1 is that in step A, the aluminum alloy raw materials for preparing the 7-series aluminum alloy sheet are mixed according to weight percentage, namely:

[0047] element Si Fe Cu Mg mn Zn Cr Ni Ti Impurities Al content 0.08 0.11 1.83 2.56 0.05 5.8 0.23 0.04 0.03 0.1 margin

Embodiment 3

[0049] The difference between Example 3 and Example 1 is that in step A, the aluminum alloy raw materials for preparing the 7-series aluminum alloy sheet are mixed according to weight percentage, namely:

[0050] element Si Fe Cu Mg mn Zn Cr Ni Ti Impurities Al content 0.05 0.13 1.78 2.53 0.04 5.9 0.24 0.03 0.02 0.1 margin

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Abstract

The invention belongs to the technical field of aluminum alloy manufacturing, and relates to a preparation process of a high-performance 7-series aluminum alloy sheet. The alloy comprises smaller thanor equal to 0.10% of Si, smaller than or equal to 0.15% of Fe, 1.7-1.9% of Cu, 2.4-2.55% of Mg, 5.8-6.0% of Zn, smaller than or equal to 0.24% of Cr, smaller than or equal to 0.04% of Ni, smaller than or equal to 0.03% of Ti, smaller than or equal to 0.05% of Mn, and smaller than or equal to 0.15% of impurities (with a single impurity being smaller than or equal to 0.05%), with the balance beingAl. By improving the formula and the process, the unevenness and the performance uniformity of the prepared aluminum alloy sheet in the width direction are guaranteed, and the problem that an ultra-large-width aluminum alloy coil prepared by an existing rolling process has poor performance uniformity and flatness in the width direction is solved.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy manufacturing, and relates to a preparation process of a high-performance 7-series aluminum alloy thin plate. Background technique [0002] As a light-weight and high-strength material, aluminum alloy is widely used in the aerospace field due to its excellent specific stiffness. Among them, 7 series and 2 series are heat-treatable aluminum alloys, which are widely used in aircraft fuselage, stiffened panels, skin panels and some structural parts. [0003] 7-series aluminum alloy ultra-wide sheets with a thickness of ≤4mm need to be produced in an air-cushion continuous annealing furnace. When the temperature is higher than 480°C, the shape of the sheet after water cooling is poor, which is likely to cause defects such as bow and sagging. In the air-cooled section Easy to cause scratches. At the same time, due to the limited length of the furnace area of ​​the annealing furnace, when the h...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/02C22F1/053
CPCC22C1/026C22C21/10C22F1/053
Inventor 赵俊才葛浩龙蔡鹏程崔学团付彦军景子毅玄宝杜凤彪祖立成
Owner TIANJIN ZHONGWANG ALUMINUM IND CO LTD
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