Zr-Sr composite microalloying and Mn-Zn alloying high-strength and high-toughness Al-Si-Cu system cast aluminum alloy and preparation method

A casting aluminum alloy and micro-alloying technology, which is applied in the field of aluminum alloy materials, can solve the problems of reducing alloy casting performance, plasticity, and low toughness, and achieve the effect of improving toughness

Inactive Publication Date: 2017-11-24
JIANGSU UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low plasticity and toughness of the current Al-Si(-Cu) cast aluminum alloy, and to invent a method based on the composition design of the Al-Si-Cu cast aluminum alloy, by adjusting the Si and Cu elements Content, at the same time add trace zirconium (Zr), strontium (Sr) elements and a small amount of manganese (Mn), zinc (Zn) elements for composite alloying, without reducing the casting performance (fluidity) of the alloy, and efficiently refine the alloy The Si phase and compound phase of the alloy can greatly improve the plasticity and toughness of the alloy, and obtain an Al-Si-Cu series cast aluminum alloy with excellent casting performance and toughness, and provide its preparation method

Method used

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  • Zr-Sr composite microalloying and Mn-Zn alloying high-strength and high-toughness Al-Si-Cu system cast aluminum alloy and preparation method
  • Zr-Sr composite microalloying and Mn-Zn alloying high-strength and high-toughness Al-Si-Cu system cast aluminum alloy and preparation method
  • Zr-Sr composite microalloying and Mn-Zn alloying high-strength and high-toughness Al-Si-Cu system cast aluminum alloy and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Such as figure 1 , 2 , 3, 4, and 5.

[0033]A kind of Zr, Sr composite microalloying and Mn, Zn alloying high strength and toughness Al-Si-Cu series casting aluminum alloy, its preparation method:

[0034] First A00 grade pure Al (99.79%Al, 0.14%Fe, 0.04%Si) and Al-Si (89.62%Al, 10.21%Si, 0.17%Fe, all components of the present invention are represented by mass percentage, the technical Personnel can obtain the corresponding weight parts through conventional planning, the same below, where the components added up to less than 100% are impurities) the master alloy is melted and heated to 850±10°C, and then Al-Cu (49.62%Al, 50.12%Cu, 0.15%Fe, 0.11%Si ) master alloy, Al-Mn(89.73%Al, 10.02%Mn, 0.19%Fe, 0.06%Si ) master alloy, Al-Zr (95.69%Al, 4.11%Zr, 0.20%Fe, 0.10%Si ) master alloy and Al-Sr (89.86%Al, 9.89%Sr, 0.15%Fe, 0.10%Si ) master alloy, add 1.04% pure Zn after melting the added master alloy and pure Al; After all the master alloys and metals are melted, adjust th...

Embodiment 2

[0038] A kind of Zr, Sr composite microalloying and Mn, Zn alloying high strength and toughness Al-Si-Cu series casting aluminum alloy, its preparation method:

[0039] First A00 grade pure Al (99.79%Al, 0.14%Fe, 0.04%Si) and Al-Si (89.62%Al, 10.21%Si, 0.17%Fe, all components of the present invention are expressed in mass percentage, the same below, All the components added up to less than 100% are impurities) the master alloy is melted and heated to 850±10°C, and then Al-Cu (49.62%Al, 50.12%Cu, 0.15%Fe, 0.11%Si ) master alloy is added in sequence , Al-Mn (89.73%Al, 10.02%Mn, 0.19%Fe, 0.06%Si ) master alloy, Al-Zr (95.69%Al, 4.11%Zr,0.20%Fe, 0.10%Si ) master alloy and Al-Sr (89.86%Al, 9.89%Sr, 0.15%Fe, 0.10%Si ) master alloy, add 1.04% pure Zn after the master alloy and pure Al are melted; after all master alloys and metals are melted, adjust the temperature to 750± 10°C, add hexachloroethane for refining and degassing until no gas escapes, let it stand for 5-10 minutes, remo...

Embodiment 3

[0043] A kind of Zr, Sr composite microalloying and Mn, Zn alloying high strength and toughness Al-Si-Cu series casting aluminum alloy, its preparation method:

[0044] First A00 grade pure Al (99.79%Al, 0.14%Fe, 0.04%Si) and Al-Si (89.62%Al, 10.21%Si, 0.17%Fe, all components of the present invention are expressed in mass percentage, the same below, All the components added up to less than 100% are impurities) the master alloy is melted and heated to 850±10°C, and then Al-Cu (49.62%Al, 50.12%Cu, 0.15%Fe, 0.11%Si ) master alloy is added in sequence , Al-Mn (89.73%Al, 10.02%Mn, 0.19%Fe, 0.06%Si ) master alloy, Al-Zr (95.69%Al, 4.11%Zr,0.20%Fe, 0.10%Si ) master alloy and Al-Sr (89.86%Al, 9.89%Sr, 0.15%Fe, 0.10%Si ) master alloy, add 1.05% pure Zn after the master alloy and pure Al are melted; after all master alloys and metals are melted, adjust the temperature to 750± 10°C, add hexachloroethane for refining and degassing until no gas escapes, let it stand for 5-10 minutes, remo...

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Abstract

The invention relates to a Zr-Sr composite microalloying and Mn-Zn alloying high-strength and high-toughness Al-Si-Cu cast aluminum alloy and a preparation method thereof. The Zr-Sr composite microalloying and Mn-Zn alloying high-strength and high-toughness Al-Si-Cu cast aluminum alloy is characterized by being mainly composed of, by mass percent, Al, 8.14%-8.24% of Si, 2.22%-82.29% of Cu, 0.484%-80.489% of Mn, 1.04%-81.05% of Zn, 0.179%-80.183% of Zr, 0.043%-80.0444% of Sr and 0.137%-80.14% of Fe. The aluminum alloy is compact in as-cast structure, and the as-cast actual measurement room temperature non-notched impact toughness is 21.659404 J/cm<2>; meanwhile, the strength of the aluminum alloy is 247.3 MPa, the ductility of the aluminum alloy is 12.545455%, and the uniform corrosion rate in a 3.5%NaCl water solution at the temperature being 37 DEG C is 0.31993164 mm/y; and the manufacturing requirement of a large complex thin-wall high-strength and high-toughness corrosion-resistant cast aluminum allot structural component can be met.

Description

technical field [0001] The invention relates to an aluminum alloy material, especially a novel high-strength and toughness Al-Si-Cu series cast aluminum alloy and a preparation method thereof, in particular a Zr, Sr composite microalloying and Mn, Zn alloying High strength and toughness Al-Si-Cu cast aluminum alloy and its preparation method. Background technique [0002] Al-Si (-Cu) series cast aluminum alloy is currently the most widely used cast aluminum alloy material in the industry. The numbers of this type of alloy are: domestic YL102 (AlSi12), YL112 (AlSi8.5Cu3.5), YL113 (AlSi811Cu3 ), Japan's ADC12 (AlSi11Cu3), ADC10 (AlSi8.5Cu3.5) and American A380 (AlSi8.5Cu3.5), etc. These alloys have excellent casting properties, high strength and good corrosion resistance, but Its plasticity and toughness are relatively low, which limits its application. [0003] It is well known that the mechanical properties of Al-Si (-Cu) cast aluminum alloys are closely related to the mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/03C22C1/06
CPCC22C21/02C22C1/026C22C1/03C22C1/06
Inventor 许晓静张福豹贾伟杰杜东辉张冲黄鹏
Owner JIANGSU UNIV
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