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A kind of preparation method of oxide dispersion strengthened al-mg-si aluminum alloy

An al-mg-si and dispersion strengthening technology, applied in the direction of additive processing, etc., can solve the problems of unsatisfactory requirements, irregular shape, and reduced alloy performance, etc., and achieve strong designability, small particle size, and high density Effect

Active Publication Date: 2021-08-03
XIANGTAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the alloy is prepared by the mechanical alloying process, elements such as Al, Mg, and Si are easily oxidized during the mechanical alloying process, which eventually reduces the properties of the alloy.
At the same time, during the high-energy ball milling process, the powder, the milling medium and the ball milling tank will collide at high speed, and the long-term ball milling will cause the elements in the ball milling medium and the ball milling tank to be introduced into the target powder to cause pollution, which will affect the final material properties.
Finally, the powder obtained by mechanical alloying is severely work-hardened, and most of them are irregularly shaped powders with poor powder fluidity. Only some special methods can be used, such as jacketed hot extrusion, jacketed hot isostatic pressing or spark plasma sintering. Can not meet the powder requirements of laser cladding forming technology

Method used

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  • A kind of preparation method of oxide dispersion strengthened al-mg-si aluminum alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Element

[0054] Al-0.75wt.%Mg-0.5wt.%Si-0.2wt.%Fe-0.08wt.%Cu-0.1wt.%Mn-0.08wt.%Ti-0.11wt.%Zn-0.5wt.%La 2 o 3 Preparation of aluminum alloy

[0055] Will be composed as

[0056] Rotating electrode atomized powder of Al-0.75wt.%Mg-0.5wt.%Si-0.2wt.%Fe-0.08wt.%Cu-0.1wt.%Mn-0.08wt.%Ti-0.11wt.%Zn and Nano La 2 o 3 The powder is weighed with a mass ratio of 99.5:0.5 for future use. The weighed mist of Al-0.75wt.%Mg-0.5wt.%Si-0.2wt.%Fe-0.08wt.%Cu-0.1wt.%Mn-0.08wt.%Ti-0.11wt.%Zn Dissolve the powder in 8g·L -1 Polydiallyldimethylammonium chloride solution, soaked for 30 minutes, and then the nano-La 2 o 3 After the powder was added into the solution and stirred for 2 hours, the solution was dried to obtain a powder precursor. The powder precursor was stirred for 2 hours in an argon atmosphere at a temperature of 100° C. and a stirring propeller rotating at a speed of 25,000 rpm to obtain nano-oxide-coated aluminum alloy powder. Finally, aluminum alloy powder was wrapp...

Embodiment 2

[0058] Element

[0059] Al-0.45wt.%Mg-0.25wt.%Si-0.2wt.%Fe-0.05wt.%Cu-0.08wt.%Mn-0.05wt.%Ti-0.1wt.%Zn-1wt.%La 2 o 3 Preparation of aluminum alloy

[0060] Will be composed as

[0061] Al-0.45wt.%Mg-0.25wt.%Si-0.2wt.%Fe-0.05wt.%Cu-0.08wt.%Mn-0.05wt.%Ti-0.1wt.%Zn rotating electrode atomized powder and Nano La 2 o 3 The powder is weighed with a mass ratio of 99:1 for future use. The weighed mist of Al-0.45wt.%Mg-0.25wt.%Si-0.2wt.%Fe-0.05wt.%Cu-0.08wt.%Mn-0.05wt.%Ti-0.1wt.%Zn Dissolve the powder in 6g·L -1 Polydiallyldimethylammonium chloride solution, soaked for 20 minutes, and then the nano-La 2 o 3 The powder was added into the solution and stirred for 1.5 hours, and then the solution was dried to obtain a powder precursor. The powder precursor was stirred for 2 hours in an argon atmosphere at a temperature of 90° C. and a stirring propeller rotating at a speed of 20,000 rpm to obtain nano-oxide-coated aluminum alloy powder. Finally, the aluminum alloy powder was wra...

Embodiment 3

[0063] Element

[0064] Al-0.55wt.%Mg-0.45wt.%Si-0.15wt.%Fe-0.05wt.%Cu-0.07wt.%Mn-0.06wt.%Ti-0.08wt.%Zn-0.6wt.%Y 2 o 3 Preparation of aluminum alloy

[0065] Will be composed as

[0066] Al-0.55wt.%Mg-0.45wt.%Si-0.15wt.%Fe-0.05wt.%Cu-0.07wt.%Mn-0.06wt.%Ti-0.08wt.%Zn rotating electrode atomized powder and Nano Y 2 o 3 The powder is weighed with a mass ratio of 99.4:0.6 for future use. The weighed mist of Al-0.55wt.%Mg-0.45wt.%Si-0.15wt.%Fe-0.05wt.%Cu-0.07wt.%Mn-0.06wt.%Ti-0.08wt.%Zn Dissolve the powder in 4g·L -1 cysteine ​​solution, soaked for 15 minutes, and then the nano-Y 2 o 3 After the powder was added into the solution and stirred for 1 hour, the solution was dried to obtain a powder precursor. The powder precursor was stirred for 2 hours in an argon atmosphere at a temperature of 110° C. and a stirring propeller rotating at a speed of 20,000 rpm to obtain nano-oxide-coated aluminum alloy powder. Finally, the aluminum alloy powder was wrapped with nano-oxide f...

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Abstract

The invention belongs to the research field of preparation of advanced metal materials, and in particular provides a preparation method of oxide dispersion strengthened Al-Mg-Si aluminum alloy. It specifically includes the following steps: Precursor powder preparation: adding the rotating electrode atomized aluminum alloy powder into the solution and soaking for an appropriate time, then selecting a nano-oxide source and adding it to the solution for stirring and drying to obtain the precursor powder. Preparation of nano-oxide-coated aluminum alloy powder: under atmosphere protection and a certain temperature, put the precursor powder into a high-speed stirring heating furnace and stir, and the nano-oxide penetrates into the surface layer of the rotating electrode atomized alloy powder particles, and finally obtains the nano-oxide coated aluminum alloy powder. The aluminum alloy powder coated with nanometer oxide is subjected to laser cladding and forming, and finally the aluminum alloy with ultrafine oxide dispersion is obtained. The invention provides a new idea for preparing ODS-strengthened Al-Mg-Si aluminum alloy, and has the advantages of short production cycle, low cost, convenient operation and the like.

Description

technical field [0001] The invention belongs to the research field of preparation of advanced metal materials, and particularly provides a preparation method of oxide dispersion strengthened Al-Mg-Si aluminum alloy. Background technique [0002] Due to the advantages of low density and high strength, aluminum matrix composites have broad application prospects in automotive, national defense, aerospace and other fields. Al-Mg-Si aluminum alloy is a heat treatable strengthening alloy with medium strength, and the main alloying elements are magnesium and silicon. The alloy has excellent processability, excellent weldability, corrosion resistance and good toughness, and is a typical extrusion alloy. Studies have shown that the Oxide Dispersion Strengthened (ODS) aluminum alloy prepared by introducing nano-oxide particles into the aluminum alloy matrix can greatly increase the strength of the aluminum alloy while maintaining a certain degree of plasticity. The high-strength nan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04C22C21/08C22C32/00B22F3/105B33Y10/00
CPCB33Y10/00C22C1/0416C22C21/08C22C32/0036
Inventor 陈旭张彦刘烨章林陈晓玮秦明礼曲选辉
Owner XIANGTAN UNIV
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