Rolling process for improving surface corrosion resistance of 6061 aluminum alloy

A technology of aluminum alloy surface and corrosion resistance, which is applied in the field of aluminum alloy manufacturing, can solve the problems that stainless steel materials cannot be replaced, and the corrosion resistance of 6061-T651 alloy thick plates cannot meet the application requirements of semiconductor parts, so as to improve mechanics and durability Effects of corrosion performance, fine grain structure, and composition optimization

Active Publication Date: 2020-06-26
TIANJIN ZHONGWANG ALUMINUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, in order to solve the problem that the corrosion resistance of the 6061-T651 alloy thick plate prepared by the existing production process cannot meet the application requirements of semiconductor parts and cannot replace stainless steel materials, the present invention provides a method for improving the corrosion resistance of the 6061 aluminum alloy surface The rolling process has greatly improved the corrosion resistance of 6061-T651 alloy thick plates in acidic environments, improved the reliability and service life of parts processed by it, and provided aluminum alloys for replacing stainless steel materials in the field of semiconductor parts preparation. strong support

Method used

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  • Rolling process for improving surface corrosion resistance of 6061 aluminum alloy
  • Rolling process for improving surface corrosion resistance of 6061 aluminum alloy
  • Rolling process for improving surface corrosion resistance of 6061 aluminum alloy

Examples

Experimental program
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Embodiment 1

[0030] A rolling process for improving the corrosion resistance of the 6061 aluminum alloy surface, comprising the following steps:

[0031] A. Ingredients: Calculate the amount of each aluminum alloy raw material and prepare the aluminum alloy raw material according to the ratio. The mass percentage ratio of each element of the 6061 aluminum alloy raw material is as follows:

[0032] Si Fe Cu mn Mg Cr Ni Zn Ti Impurities Al content 0.58 0.14 0.28 0.07 0.96 0.21 0.003 0.007 0.02 0.06 margin

[0033] B. Melting and casting: Put the configured aluminum alloy raw materials into the melting furnace for melting in turn, and use flux to refine and cover. After feeding, start stirring when aluminum water appears in the furnace. After stirring evenly, it will be melted into liquid aluminum alloy. The melting temperature is 730 ℃, pour the smelted aluminum alloy melt into the refining furnace for refining, the refining temperature is 7...

Embodiment 2

[0044] The difference between Example 2 and Example 1 is that the number of rolling passes in step F is 19, and 3 passes of large deformation rolling are introduced in the 10th to 12th passes to ensure that the deformation in a single pass is not less than 50mm. Before the start of the 13th pass, the temperature of the plate was measured, and the temperature was 472°C. The rolling was suspended, and the temperature was lowered to 370°C by spraying the emulsion. Then switch to small deformation pass rolling, real-time emulsion spraying mode according to the rolling situation and the plate feedback temperature, control the plate temperature, and the plate final rolling temperature is 205°C. Among them, Table 2 of hot rolling passes of aluminum alloy ingots is as follows:

[0045]

[0046]

[0047] The grain structure of 6061-T651 plate in embodiment 2 is as follows figure 2 shown.

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Abstract

The invention belongs to the technical field of aluminum alloy manufacturing, and relates to a rolling process for improving surface corrosion resistance of 6061 aluminum alloy. The aluminum alloy comprises, by weight, 0.50%-0.65% of Si, less than or equal to 0.2% of Fe, 0.25%-0.35% of Cu, less than or equal to 0.10% of Mn, 0.9%-1.1% of Mg, 0.13%-0.26% of Cr, less than or equal to 0.05% of Ni, less than or equal to 0.04% of Zn, less than or equal to 0.15% of Ti, less than or equal to 0.05% of single impurities while less than or equal to 0.15% of the total impurities, and the balance Al. In the hot rolling procedure, the hot rolling process combining large-deformation rolling and small-deformation temperature control rolling is adopted, a 6061-T651 alloy thick plate with the excellent corrosion resistance is prepared, the grain structure of the plate is fine and uniform, and under the condition that the mechanical property is not lost, the corrosion resistance of the plate in the acidenvironment is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy manufacturing, and relates to a rolling process for improving the corrosion resistance of the 6061 aluminum alloy surface, in particular to a rolling process for a 6061-T651 aluminum alloy thick plate with excellent corrosion resistance in an acidic environment. Background technique [0002] Aluminum alloy has comprehensive characteristics such as low density, high specific strength, good machinability and corrosion resistance, and is widely used in aerospace, shipping, parts manufacturing and other fields. Among them, the 6xxx series aluminum alloy has low strength after solution heat treatment, which is suitable for processing components with high dimensional accuracy requirements, and can achieve high strength and good corrosion resistance after subsequent treatment. Mechanical parts in the traditional semiconductor industry are mostly made of stainless steel, but under the development t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C21/08C22F1/047B21C37/02C25D11/04
CPCB21C37/02C22C1/026C22C21/08C22F1/047C25D11/04
Inventor 陈金生祖立成张立鑫杜凤彪张冉
Owner TIANJIN ZHONGWANG ALUMINUM IND CO LTD
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