High-performance Al-Mg-Si-Cu-Sn aluminum alloy and preparation method thereof

An al-mg-si-cu-sn, high-performance technology, applied in the field of high-performance Al-Mg-Si-Cu-Sn aluminum alloy and its preparation, can solve the problems of reducing the mechanical properties of the artificial age hardening rate alloy, Achieve the effects of increasing the response rate of artificial aging, increasing the precipitation rate, and increasing the density of vacancies and dislocations

Active Publication Date: 2022-07-05
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In addition, affected by factors such as the production task schedule of the enterprise, production conditions and the environment, aluminum alloy products are sometimes unavoidably parked at room temperature for a period of time during the production process. During this period, the alloy undergoes natural aging, which will reduce the rate of subsequent artificial age hardening and Alloy Mechanical Properties

Method used

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  • High-performance Al-Mg-Si-Cu-Sn aluminum alloy and preparation method thereof
  • High-performance Al-Mg-Si-Cu-Sn aluminum alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) An aluminum alloy of Al-0.5Mg-0.5Si-0.3Cu-0.05Sn, the alloy is composed of the following components according to the mass ratio: Mg: 0.5%, Si: 0.5%, Cu: 0.3%, Sn: 0.05 %, inevitable impurities≤0.02%, and the balance is Al. According to the above ratio of raw materials, pure aluminum, aluminum-silicon master alloy Al-20%Si, and aluminum-copper master alloy Al-50%Cu were preheated at 200°C, and then kept at 750°C for 1 h to obtain an alloy melt, which was then placed in sequence. Pure magnesium and pure tin were stirred and kept for 0.5h, then cooled to 720°C, added with grain refiner Al-5Ti-1B (0.2wt.%), and allowed to stand for 15min, then added to the iron mold at 200°C Casting in the middle to obtain aluminum alloy ingots;

[0030] (2) performing homogenization treatment on the alloy ingot obtained in step (1), quenching with water at 550° C. for 12 hours to obtain a homogenized ingot;

[0031] (3) Extrusion: the homogenized ingot obtained in step (2) is extrude...

Embodiment 2

[0034] (1) An aluminum alloy of Al-0.5Mg-0.5Si-0.3Cu-0.05Sn, the alloy is composed of the following components according to the mass ratio: Mg: 0.5%, Si: 0.5%, Cu: 0.3%, Sn: 0.05 %, inevitable impurities≤0.02%, and the balance is Al. According to the above ratio of raw materials, pure aluminum, aluminum-silicon master alloy Al-20%Si, and aluminum-copper master alloy Al-50%Cu were preheated at 200°C, and then kept at 750°C for 1 h to obtain an alloy melt, which was then placed in sequence. Pure magnesium and pure tin were stirred and kept for 0.5h, then cooled to 720°C, added with grain refiner Al-5Ti-1B (0.2wt.%), and allowed to stand for 15min, then added to the iron mold at 200°C Casting in the middle to obtain aluminum alloy ingots;

[0035] (2) performing homogenization treatment on the alloy ingot obtained in step (1), quenching with water at 550° C. for 12 hours to obtain a homogenized ingot;

[0036](3) Extrusion: the homogenized ingot obtained in step (2) is extruded...

Embodiment 3

[0039] (1) An aluminum alloy of Al-0.5Mg-0.5Si-0.3Cu-0.1Sn, the alloy is composed of the following components according to the mass ratio: Mg: 0.5%, Si: 0.5%, Cu: 0.3%, Sn: 0.1 %, inevitable impurities≤0.02%, and the balance is Al. According to the above ratio of raw materials, pure aluminum, aluminum-silicon master alloy Al-20%Si, and aluminum-copper master alloy Al-50%Cu were preheated at 200°C, and then kept at 750°C for 1 h to obtain an alloy melt, which was then placed in sequence. Pure magnesium and pure tin were stirred and kept for 0.5h, then cooled to 720°C, added with grain refiner Al-5Ti-1B (0.2wt.%), and allowed to stand for 15min, then added to the iron mold at 200°C Casting in the middle to obtain aluminum alloy ingots;

[0040] (2) performing homogenization treatment on the alloy ingot obtained in step (1), quenching with water at 550° C. for 12 hours to obtain a homogenized ingot;

[0041] (3) Extrusion: the homogenized ingot obtained in step (2) is extruded ...

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Abstract

The invention discloses a high-performance Al-Mg-Si-Cu-Sn aluminum alloy and a preparation method thereof, and the high-performance Al-Mg-Si-Cu-Sn aluminum alloy comprises the following alloy components in percentage by mass: 0.1 to 1.0 percent of Mg, 0.3 to 1.2 percent of Si, 0.1 to 0.6 percent of Cu, 0.01 to 0.2 percent of Sn, less than or equal to 0.02 percent of inevitable impurities and the balance of Al. According to the alloy component proportion, the preparation method of the Al-Mg-Si-Cu-Sn alloy comprises the steps of smelting, pouring, homogenizing, extruding or rolling, solid solution, pre-deformation (natural aging can be carried out before pre-deformation) and artificial aging treatment. By optimizing the alloy component design and the synergistic effect of related processes, the number of second phases of the alloy is increased, and the precipitation rate of the second phases can be remarkably increased. Compared with the prior art, the effects of synchronously improving the mechanical property of the aluminum alloy and shortening the peak hardening time are achieved.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a high-performance Al-Mg-Si-Cu-Sn aluminum alloy and a preparation method thereof. Background technique [0002] Compared with steel materials, aluminum alloy materials have the characteristics of high specific strength and good corrosion resistance. According to relevant data, every 10% reduction in the total weight of the vehicle can save 6%-8% of fuel and reduce pollutant emissions by about 4%. The lightweight development in the automotive field has a huge demand for the amount of Al-Mg-Si-Cu aluminum alloys. Usually, the solute elements of the aluminum alloy are in a highly supersaturated state after solution + quenching, and artificial aging treatment is required to improve the strength of the alloy. But generally commercial aluminum alloys are artificially aged (T6) immediately after solution heat treatment, and the time to reach peak strength is usually 10h-20h, or even lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/08C22C1/03C22C1/06C22F1/043C22F1/047C22F1/05
CPCC22C21/02C22C21/08C22C1/026C22C1/03C22C1/06C22F1/043C22F1/047C22F1/05
Inventor 贾海龙赵海冬查敏商春平姜润薛利文赵玉桥周文强张梦娜
Owner JILIN UNIV
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