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Preparation method of a medium-strength weldable and corrosion-resistant high-magnesium aluminum alloy forging containing scandium

A high-magnesium aluminum alloy and magnesium-aluminum alloy technology is applied in the field of preparation of medium-strength weldable and corrosion-resistant high-magnesium aluminum alloy forgings containing scandium to increase recrystallization temperature, inhibit recrystallization and strengthening, and refine as-cast grains Effect

Active Publication Date: 2021-09-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] But so far: using forging-extrusion-forging and strictly controlling the temperature of the final one-fire forging to prepare a medium-strength weldable, corrosion-resistant, scandium-containing high-magnesium aluminum alloy with excellent properties; there are few reports

Method used

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  • Preparation method of a medium-strength weldable and corrosion-resistant high-magnesium aluminum alloy forging containing scandium

Examples

Experimental program
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Effect test

Embodiment 1

[0066] In this embodiment, a method for manufacturing a medium-strength weldable and corrosion-resistant high-magnesium aluminum alloy forging containing scandium includes the following steps:

[0067] 1. Ingredients: According to the mass percentage of each element in the medium-strength weldable and corrosion-resistant high-magnesium aluminum alloy forgings containing scandium: Mg: 4.2%, Mn: 0.15%, Sc: 0.20%, Zr: 0.10%, Ti: 0.02%, Be : 0.0005%, and the ratio of the balance Al to weigh pure aluminum ingots, pure magnesium ingots, aluminum-manganese master alloys, zirconium composite salts, aluminum-titanium master alloys and aluminum-beryllium master alloys.

[0068] 2. Melting: A. Add the pure aluminum ingots, aluminum-manganese intermediate alloys, zirconium composite salts, and aluminum-titanium intermediate alloys weighed in step 1 into the melting furnace, melt them into a melt at 740°C to 760°C, and raise the temperature to 800 ℃ ~ 810 ℃, add aluminum scandium master al...

Embodiment 2

[0078] In this embodiment, a method for manufacturing a medium-strength weldable and corrosion-resistant high-magnesium aluminum alloy forging containing scandium includes the following steps:

[0079] 1. Ingredients: According to the mass percentage of each element in the medium-strength weldable and corrosion-resistant high-magnesium aluminum alloy forgings containing scandium: Mg: 6.5%, Mn: 0.4%, Sc: 0.40%, Zr: 0.13%, Ti: 0.05%, Be : 0.005%, and the ratio of the balance Al to weigh pure aluminum ingots, pure magnesium ingots, aluminum-manganese master alloys, zirconium composite salts, aluminum-titanium master alloys and aluminum-beryllium master alloys.

[0080] 2. Melting: A. Add the pure aluminum ingots, aluminum-manganese intermediate alloys, zirconium composite salts, and aluminum-titanium intermediate alloys weighed in step 1 into the melting furnace, melt them into a melt at 740°C to 760°C, and raise the temperature to 800 ℃ ~ 810 ℃, add aluminum scandium master allo...

Embodiment 3

[0090] In this embodiment, a method for manufacturing a medium-strength weldable and corrosion-resistant high-magnesium aluminum alloy forging containing scandium includes the following steps:

[0091] 1. Ingredients: According to the mass percentage of each element in the medium-strength weldable and corrosion-resistant high-magnesium aluminum alloy forgings containing scandium: Mg: 5.5%, Mn: 0.25%, Sc: 0.30%, Zr: 0.11%, Ti: 0.03%, Be : 0.003%, and the ratio of the balance Al to weigh pure aluminum ingots, pure magnesium ingots, aluminum-manganese master alloys, zirconium composite salts, aluminum-titanium master alloys and aluminum-beryllium master alloys.

[0092] 2. Melting: A. Add the pure aluminum ingots, aluminum-manganese intermediate alloys, zirconium composite salts, and aluminum-titanium intermediate alloys weighed in step 1 into the melting furnace, melt them into a melt at 740°C to 760°C, and raise the temperature to 800 ℃ ~ 810 ℃, add aluminum scandium master all...

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Abstract

The invention relates to a method for preparing a medium-strength weldable and corrosion-resistant high-magnesium aluminum alloy forging containing scandium. In the present invention, the scandium-containing magnesium-aluminum alloy ingot is homogenized and annealed at 300°C to 400°C; then the temperature is raised to 400°C to 450°C; heat preservation is carried out, and the first stage of forging pier thickness is carried out after heat preservation; the forging ratio of the first stage pier thickness is: 1.03-1.08; get the pre-cut long sample; then extrude the obtained pre-cut long sample; then carry out the second stage of forging pier thickening; in the second stage of forging process, the temperature of the last fire forging is controlled at 280-300°C . The scandium-containing magnesium-aluminum alloy ingot contains Mg, Mn, Sc, Zr, Ti, Be and other elements. The yield strength performance of the medium-strength weldable and corrosion-resistant high-magnesium aluminum alloy forging containing scandium prepared by the invention satisfies the material processing performance is more than 100% higher than that of the 5A06 alloy.

Description

technical field [0001] The invention relates to a method for preparing a medium-strength weldable and corrosion-resistant high-magnesium aluminum alloy forging containing scandium, belonging to the technical field of special magnesium alloy processing. Background technique [0002] Scandium-containing aluminum alloy is a promising aluminum alloy structural material; it has certain applications in aerospace, nuclear energy and ships. A lot of work has been done on the study of scandium-containing aluminum alloys. For example, the All-Russian Aviation Research Institute and the All-Russian Light Metal Research Institute have developed Al-Mg-SC (01575, 01571, 01570, 01545, 01535, 01515), Al -Zn-Mg-Sc (01970, 01975), Al-Mg-Li-Sc (01421, 01423), Al-Cu-Li-Sc (01460), Al-Zn-Mg-Cu-Sc (01981), etc. Various grades of Sc-containing aluminum alloys. [0003] People have also done a lot of research on the processing methods of scandium-containing aluminum alloys; for example, Nie Bo et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22C1/03C22C1/06C22F1/047
CPCC22C1/026C22C1/03C22C1/06C22C21/08C22F1/047
Inventor 姜锋路丽英
Owner CENT SOUTH UNIV