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Thermal deformation and stabilization annealing process and material of Al-Mg-Mn-Er-Zr alloy

A stabilized annealing and thermal deformation technology, which is applied in the field of metal materials, can solve the problems of corrosion resistance deterioration of alloys, and achieve the effect of improving corrosion resistance and good tensile properties

Inactive Publication Date: 2019-04-26
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When the content of Mg element in aluminum-magnesium alloy is higher than 3.5%, supersaturated Mg atoms will precipitate in the matrix, and it is easy to form a continuous network β phase (Al 3 Mg 2 ), resulting in deterioration of the corrosion resistance of the alloy

Method used

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  • Thermal deformation and stabilization annealing process and material of Al-Mg-Mn-Er-Zr alloy
  • Thermal deformation and stabilization annealing process and material of Al-Mg-Mn-Er-Zr alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1 (i.e. comparative example):

[0013] The Al-Mg-Mn-Er-Zr alloy ingot is subjected to hot deformation above 250°C. The composition of the alloy was analyzed by X-ray fluorescence (XRF), and the specific composition is shown in Table 1.

[0014] Table 1 The actual composition of the experimental alloy (wt.%)

[0015]

Embodiment 2

[0017] Perform stabilization annealing on the thermally deformed plates in Example 1 at 280°C, 290°C, 300°C, 310°C and 320°C respectively, the annealing time is 1-2h, and stretch the experimental alloy after stabilization annealing Performance test, intergranular corrosion weight loss test (American Society for Testing and Materials standard ASTM G67-04) and exfoliation corrosion test (American Society for Testing and Materials standard ASTM G66-99), the test results are shown in Table 2.

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Abstract

The invention relates to a thermal deformation and stabilization annealing process and a material of Al-Mg-Mn-Er-Zr alloy, and belongs to the technical field of metal materials. The Al-Mg-Mn-Er-Zr alloy is prepared from the following components: 5.5% to 6.5% of Mg, 0.7% to 1.1% of Mn, 0.02% to 0.3% of Er, 0.02% to 0.2% of Zr, less than 0.4% of Fe, less than 0.4% of Si, less than 0.1% of Cu, less than 0.2% of Zn and the balance of Al. Thermal deformation is performed on cast ingots at 250 DEG C to 300 DEG C, then stabilization annealing is performed, and the annealing temperature is 280 to 320DEG C.A plate prepared by adopting the process has good tensile property, and additionally, the corrosion resistance of the alloy is improved.

Description

technical field [0001] The invention relates to a high-magnesium aluminum alloy thermally deformed and stabilized annealed plate containing Er and Zr microalloy elements and having a Mg content of 5.5wt.%-6.5wt.%, and belongs to the technical field of metal materials. Background technique [0002] 5xxx series aluminum alloys have low density, good processing, welding, mechanical and corrosion resistance properties, especially suitable for some structures used in corrosive environments. Therefore, it is widely used in aerospace, navigation, ships and other fields. Moreover, the traditional Al-Mg alloys belong to alloys that cannot be strengthened by heat treatment, and the comprehensive properties of the alloys are mainly improved by means of solid solution strengthening, work hardening and microalloying. [0003] Adding trace rare earth elements to 5xxx series aluminum alloys can significantly improve the microstructure of the alloy, thereby improving the comprehensive prop...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22F1/047
CPCC22C21/08C22F1/047
Inventor 聂祚仁梁岳莹黄晖高坤元文胜平吴晓蓝李红梅魏午郭骁
Owner BEIJING UNIV OF TECH
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