High-strength wrought aluminum alloy and production method thereof

A deformed aluminum alloy, high-strength technology, applied in the field of alloys, to achieve stable performance, improve mechanical properties, and small grains

Inactive Publication Date: 2021-09-28
SHANDONG NANSHAN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the deficiencies of the prior art, the present invention provides a high-strength deformed aluminum alloy and a preparation method thereof, which optimizes melting, casting and extrusion by adding heavy rare earth Gd, microalloy strengthening elements Mg and Si, and grain refinement elements Pressing and heat treatment process to prepare high-performance deformed aluminum alloy materials and realize stable production, which greatly improves its strength and ductility, so that it can meet the needs of manufacturing aerospace, automotive and other fields

Method used

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  • High-strength wrought aluminum alloy and production method thereof
  • High-strength wrought aluminum alloy and production method thereof
  • High-strength wrought aluminum alloy and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A high-strength deformed aluminum alloy, composed of the following components in weight percentage: Mg0.5%; Si0.3%; Gd0.5%; Zr0.3%; the balance is Al and unavoidable impurities, wherein the impurity elements The content is less than 0.02%.

[0032] The above-mentioned high-strength deformed aluminum alloy is prepared by the following process:

[0033] S1: Weigh 940kg of industrial pure Al, 5kg of industrial pure Mg, 25kg of Al-20Gd master alloy, 15kg of Al-20Si master alloy and 15kg of Al-20Zr master alloy according to the proportions mentioned above.

[0034] S2: Heat the reactor, firstly heat the reactor to 700°C and add pure Al until the pure Al is completely melted, then add industrial pure Mg until it is completely melted, and when the temperature continues to rise to 720°C, the Al-20Gd master alloy Add the Al-20Si master alloy into the melt until it is completely melted, continue to raise the temperature of the reactor to 780°C, and then add the Al-20Zr master al...

Embodiment 2

[0041] A high-strength deformed aluminum alloy, composed of the following components in weight percentage: Mg0.5%; Si0.3%; Gd0.5%; Zr0.3%; the balance is Al and unavoidable impurities, wherein the impurity elements The content is less than 0.02%.

[0042] The above-mentioned high-strength deformed aluminum alloy is prepared by the following process:

[0043] S1: Weigh 940kg of industrial pure Al, 5kg of industrial pure Mg, 25kg of Al-20Gd master alloy, 15kg of Al-20Si master alloy and 15kg of Al-20Zr master alloy according to the proportions mentioned above.

[0044] S2: Heat the reactor, firstly heat the reactor to 700°C and add pure Al until the pure Al is completely melted, then add industrial pure Mg until it is completely melted, and when the temperature continues to rise to 720°C, the Al-20Gd master alloy Add the Al-20Si master alloy into the melt until it is completely melted, continue to raise the temperature of the reactor to 780°C, and then add the Al-20Zr master al...

Embodiment 3

[0051] A high-strength wrought aluminum alloy consisting of the following components by weight percentage: Mg0.8%, Si0.6%, Gd0.8%; Zr0.4%; the balance is Al and unavoidable impurities, of which impurity elements The content is less than 0.02%.

[0052] The preparation method is the same as that of Example 2, wherein 902 kg of industrial pure Al, 8 kg of industrial pure Mg, 40 kg of Al-20Gd master alloy, 30 kg of Al-20Si master alloy and 20 kg of Al-20Zr master alloy are added.

[0053] The aluminum alloy prepared above was subjected to a tensile test at room temperature. The tensile machine was a Zwick BTC-Z100 electronic universal material testing machine, and the tensile test rate was 0.5 mm / min. The tensile strength of the obtained alloy at room temperature is 562MPa, the yield strength is 514MPa, and the elongation is 11.7%.

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Abstract

The invention provides a high-strength wrought aluminum alloy and a production method thereof, and mainly relates to the technical field of alloys. The high-strength wrought aluminum alloy comprises the following components in percentage by weight: 0.5 to 1.0 percent of Mg, 0.3 to 0.8 percent of Si, 0.5 to 1.0 percent of Gd, 0.3 to 0.5 percent of Zr, and the balance Al and inevitable impurities. The production method of the high-strength wrought aluminum alloy comprises the following production steps: weighing industrial pure Al, industrial pure Mg, an Al-Gd intermediate alloy, an Al-Si intermediate alloy and an Al-Zr intermediate alloy according to the proportions, and melting the raw materials; casting molten alloy liquid into an ingot; subjecting the obtained aluminum alloy ingot to cold rolling deformation; subjecting an obtained aluminum alloy to aging treatment to obtain a T6-state wrought aluminum alloy; and subjecting the obtained aluminum alloy to hot rolling. The high-strength wrought aluminum alloy and the production method thereof have the beneficial effects that the strength and the ductility of the aluminum alloy are greatly improved so that the aluminum alloy can meet the production requirements of the fields of aerospace, automobiles and the like.

Description

technical field [0001] The invention mainly relates to the field of alloy technology, in particular to a high-strength deformed aluminum alloy and a preparation method thereof. Background technique [0002] As a lightweight metal structural material in current engineering applications, aluminum alloy has low density, high specific strength and specific stiffness, and has great application advantages in high-end fields such as aerospace, high-speed light rail trains, and 3C products. The Al-Mg-Si-RE alloy system of rare earth aluminum alloy has experienced the transition from Al-Mg-Si-Sc system, Al-Mg-Si-Th system, Al-Mg-Si-Y system to the current Al-Mg- The development history of Si-Gd alloy system has successively developed a variety of new aluminum alloys with RE as the main additive element. As far as the current status of the aluminum alloy industry is concerned, the application of Y element in aluminum alloy is becoming more and more mature, while the research on Gd, T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C21/02C22C21/00C22C1/03C22F1/04C22F1/043C22F1/047B21C23/00
CPCC22C21/08C22C21/02C22C21/00C22C1/026C22C1/03C22F1/04C22F1/043C22F1/047B21C23/00
Inventor 马德良任少华张大伟张积龙隋来智范坤任阁曲迎春隋智宇马旭
Owner SHANDONG NANSHAN ALUMINUM
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