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Al-Mg-Mn-Er-Zr aluminum alloy cold-rolled plate and stabilizing process thereof

An aluminum alloy and stabilization technology, applied in the field of non-ferrous metal alloy materials, can solve the problem of few reports of stabilization annealing process, and achieve good resistance to intergranular corrosion and exfoliation corrosion, good mechanical properties, and good corrosion resistance. Effect

Inactive Publication Date: 2017-09-19
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are very few reports on the stabilization annealing process of Er-containing high-magnesium aluminum alloy plates.

Method used

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  • Al-Mg-Mn-Er-Zr aluminum alloy cold-rolled plate and stabilizing process thereof
  • Al-Mg-Mn-Er-Zr aluminum alloy cold-rolled plate and stabilizing process thereof
  • Al-Mg-Mn-Er-Zr aluminum alloy cold-rolled plate and stabilizing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) The mass percentage is: Mg5.50%, Mn0.63%, Er0.11%, Zr0.02%, unavoidable impurity content <0.5%, the balance is Al 20mm thick Er aluminum-magnesium alloy hot-rolled plate , Annealing at 460°C for 2h, and then hot-rolling the aluminum plate, leaving a 50%-70% cold deformation for the finished plate, and hot-rolling the aluminum plate to 8mm.

[0018] 2) Perform intermediate annealing at 350°C / 2h on the alloy sheet obtained in step 1). The aluminum plate after the intermediate annealing is subjected to multiple passes of cold finish rolling, the reduction of each pass is controlled at 10%-25%, and the cold deformation amount is 50%-70%.

[0019] 3) Step 2) The obtained cold-rolled sheet is annealed at 260°C for different times, and the microhardness of the cold-rolled sheet is measured as the microhardness of the cold-rolled sheet changes with the annealing time, such as figure 1 Shown.

[0020] 4) The difference in step 3) is that the final annealing treatment is performed a...

Embodiment 2

[0023] 1) The mass percentage is: Mg6.0%, Mn0.84%, Zr0.06%, unavoidable impurity content <0.5%, the balance is Al 20mm thick Er-containing aluminum-magnesium alloy hot-rolled sheet, carried out at 460℃ After annealing for 2 hours, the aluminum plate is hot-rolled for hot rolling, leaving a cold deformation of 50%-70% for the finished plate, and the aluminum plate is hot-rolled to 8mm.

[0024] 2) Perform intermediate annealing at 350°C / 2h on the alloy sheet obtained in step 1). The aluminum plate after the intermediate annealing is subjected to multiple passes of cold finish rolling, the reduction of each pass is controlled at 10%-25%, and the cold deformation amount is 50%-70%.

[0025] 3) Step 2) The obtained cold-rolled sheet is annealed at 260°C for different times, and the microhardness of the cold-rolled sheet is measured as the microhardness of the cold-rolled sheet changes with the annealing time, such as figure 2 Shown.

[0026] 4) The difference in step 3) is that the fi...

Embodiment 3

[0030] 1) The cold-rolled sheet obtained in step 2) of Example 1 was annealed at 260°C for 1h / 4h / 8h, respectively. Air-cooled to room temperature, and then the tensile properties of the obtained sheet were tested. The results are shown in Table 1.

[0031] 2) The difference from step 1) of Example 3 is the annealing treatment at 270°C for 4 hours.

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Abstract

The invention discloses an Al-Mg-Mn-Er-Zr aluminum alloy cold-rolled plate and a stabilizing process thereof, and belongs to the technical field of non-ferrous metal alloy materials. The stabilizing process comprises the following steps of: firstly performing hot-rolling and thinning on a high-magnesium Al-Mg-Mn-Er-Zr aluminum alloy cast ingot; performing 2h intermediate annealing at a temperature of 350 DEG C; performing multi-pass cold finish rolling after annealing and cooling, wherein final cold deformation amount is 50-70%; and performing stable annealing on the high-magnesium Al-Mg-Mn-Er-Zr aluminum alloy cold-rolled plate, wherein an annealing temperature ranges from 260 DEG C to 280 DEG C, and annealing time ranges from 2 hours to 4 hours. The stabilizing process provided by the invention reduces dislocation density in alloy, so that the alloy has excellent comprehensive mechanical property and good corrosion resistance.

Description

Technical field [0001] The invention relates to a stabilization process for Al-Mg-Mn-Er-Zr aluminum alloy cold-rolled plates, and belongs to the technical field of non-ferrous metal alloy materials. Background technique [0002] In the aluminum alloy series, the Al-Mg alloy is a heat-treated non-strengthable alloy, which is widely used and has the characteristics of medium strength, corrosion resistance, processing performance and welding performance. It is widely used in aviation, aerospace and marine fields, generally in annealing , Used under cold work hardening and stabilization treatment. The main alloy component of 5xxx aluminum alloy is Mg, which has a very strong solid solution strengthening effect in the aluminum matrix. The magnesium pinning dislocations in the aluminum matrix lead to an increase in the slip and climbing activation energy of the dislocations. As the content of Mg increases, the strength of the alloy increases and the plasticity decreases. Supersaturat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/06C22F1/047
CPCC22C21/06C22F1/047
Inventor 聂祚仁刘培亮吴晓蓝高坤元黄晖文胜平王为
Owner BEIJING UNIV OF TECH
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