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Scandium, zirconium and strontium compound microalloyed 6013 type aluminium alloy and preparation method thereof

A technology of microalloying and aluminum alloy, which is applied in the field of new 6000 series aluminum alloy and its preparation, scandium, zirconium and strontium composite microalloyed 6013 aluminum alloy and its preparation field, which can solve the problems of restricting development and achieve anti- Good corrosion resistance, high hardness, and broad application prospects

Active Publication Date: 2010-09-22
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, so far, there is no 6013 aluminum alloy with independent intellectual property rights available in our country, which restricts the development of my country's aerospace, weaponry and other industries to a certain extent.

Method used

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  • Scandium, zirconium and strontium compound microalloyed 6013 type aluminium alloy and preparation method thereof
  • Scandium, zirconium and strontium compound microalloyed 6013 type aluminium alloy and preparation method thereof
  • Scandium, zirconium and strontium compound microalloyed 6013 type aluminium alloy and preparation method thereof

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Embodiment 1

[0030] Such as figure 1 , 2 , 3, 4, 5, 6, 7, and 8.

[0031] A scandium, zirconium and strontium composite microalloyed 6013 type aluminum alloy is prepared according to the following method and is prepared by 28kg aluminum alloy as an example.

[0032] First, 20.171 kg of A00 grade pure Al (composition: 99.79% Al, 0.14% Fe, 0.04% Si, all components of the present invention are represented by mass percentage, the same below) is melted, and then 0.534 kg of Al-Cu master alloy (49.62 %Al, 50.12% Cu, 0.15% Fe, 0.11% Si) (Cu loss rate is about 6.25%), 3.002kg Al-Si master alloy (89.62% Al, 10.21% Si, 0.17% Fe) (Si loss rate is about 5%), 1.695kg Al-Mn master alloy (89.73% Al, 10.02% Mn, 0.19% Fe, 0.06% Si) (the loss rate of Mn is about 10%), 0.881kg Al-Zr master alloy ( 95.69% Al, 4.11% Zr, 0.20% Fe, 0.10% Si) (Zr loss rate is about 8%), 0.277kg Al-Sr master alloy (89.85% Al, 9.89% Sr, 0.16% Fe, 0.10% Si) (the loss rate of Sr is about 75%), 0.998kg Al-Sc master alloy (98% Al, ...

Embodiment 2

[0038] A kind of scandium, zirconium and strontium composite microalloyed 6013 type aluminum alloy, its preparation method is:

[0039] Take 28kg aluminum alloy as an example.

[0040] First melt 20.229kg A00 grade pure Al (composition: 99.79% Al, 0.14% Fe, 0.04% Si) and then add 0.454kg Al-Cu master alloy (49.62% Al, 50.12% Cu, 0.15% Fe, 0.11% Si) ( Cu loss rate is about 6.25%), 3.41kg Al-Si master alloy (89.62% Al, 10.21% Si, 0.17% Fe) (Si loss rate is about 5%), 1.351kg Al-Mn master alloy (89.73 %Al, 10.02%Mn, 0.19%Fe, 0.06%Si) (the loss rate of Mn is about 10%), 0.963kg Al-Zr master alloy (95.69%Al, 4.11%Zr, 0.20%Fe, 0.10%Si) (Zr loss rate is about 8%), 0.429kgAl-Sr master alloy (89.85%Al, 9.89%Sr, 0.16%Fe, 0.10%Si) (Sr loss rate is about 75%), 0.685kgAl-Sc intermediate Alloy (98% Al, 2% Sc) (Sc loss rate is about 8%), 0.027kg pure Zn (Zn loss rate is about 8%), 0.452kg pure Mg (Mg loss rate is about 20%) , the master alloy can be purchased directly from the market, or ...

Embodiment 3

[0045] A kind of scandium, zirconium and strontium composite microalloyed 6013 type aluminum alloy, its preparation method is:

[0046] Take 28kg aluminum alloy as an example.

[0047] First melt 20.198kg A00 grade pure Al (composition: 99.79% Al, 0.14% Fe, 0.04% Si) and then add 0.627kg Al-Cu master alloy (49.62% Al, 50.12% Cu, 0.15% Fe, 0.11% Si) ( Cu loss rate is about 6.25%), 2.598kg Al-Si master alloy (89.62% Al, 10.21% Si, 0.17% Fe) (Si loss rate is about 5%), 2.055kg Al-Mn master alloy (89.73 %Al, 10.02%Mn, 0.19%Fe, 0.06%Si) (the loss rate of Mn is about 10%), 0.800kg Al-Zr master alloy (95.69%Al, 4.11%Zr, 0.20%Fe, 0.10%Si) (Zr loss rate is about 8%), 0.131kg Al-Sr master alloy (89.85% Al, 9.89% Sr, 0.16% Fe, 0.10% Si) (Sr loss rate is about 75%), 1.187kg Al-Sc intermediate Alloy (98% Al, 2% Sc) (Sc loss rate is about 8%), 0.036kg pure Zn (Zn loss rate is about 8%), 0.368kg pure Mg (Mg loss rate is about 20%) , the master alloy can be purchased directly from the mark...

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Abstract

The invention discloses a scandium, zirconium and strontium compound microalloyed 6013 type aluminium alloy. The invention is characterized in that the aluminium alloy is mainly composed of aluminium (Al), magnesium (Mg), silicon (Si), copper (Cu), manganese (Mn), zinc (Zn), ferrum (Fe), zirconium (Zr), strontium (Sr) and scandium (Sc); the other elements except aluminium account for 1.05-1.29%, 0.9-1.18%, 0.762-1.053%, 0.453-0.662%, 0.0902-0.117%, 0.108-0.130%, 0.0116-0.0379% and 0.045-0.078% by mass percent respectively, the balance aluminium and less impurity elements. The preparation process of the alloy includes: pure Al is melted, Al-Cu intermediate alloy, Al-Si intermediate alloy, Al-Mn intermediate alloy, Al-Zr intermediate alloy, Al-Sr intermediate alloy, Al-Sc intermediate alloy, pure Zn, pure Mg are sequentially added, refining, standing and heat preservation are carried out, then casting into ingot is carried out, and then annealing, forging and solution treatment are carried out, thus obtaining the alloy. The invention has intergranular corrosion resistance no lower than level four and stripping corrosion resistance reaching level PA, can be widely applied to the fields of modern aviation and weaponry and has wide application prospect.

Description

technical field [0001] The present invention relates to an aluminum alloy and its preparation method, in particular to a novel 6000-series aluminum alloy and its preparation method, in particular to a scandium, zirconium and strontium composite microalloyed 6013 aluminum alloy and its preparation method . Background technique [0002] In the 21st century, the demand for high-end aluminum alloys has increased significantly. my country's large aircraft project has started, and rail transit has entered a development period. The 6013 aluminum alloy of the 6000 series is an aluminum alloy with good comprehensive performance. It has medium strength, good formability (melting and casting performance, plastic formability, weldability) and corrosion resistance. Compared with 6061 aluminum alloy, its strength, Over 15% harder and has similar corrosion resistance and weldability. The lower fuselage panels of A380, the most advanced civilian large aircraft in the world today, are all...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C21/02C22C1/03C22F1/05
Inventor 许晓静张福豹吴桂潮王彬王宏宇赵梓皓罗勇宋涛费正旦程晓农
Owner JIANGSU UNIV
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