Ultrahigh-toughness cast aluminum alloy and forming method thereof

A casting aluminum alloy, ultra-high strength and toughness technology, applied in the field of high-performance casting aluminum alloy materials and its processing, can solve problems in the laboratory research stage, etc., to achieve changing the solidification mode of the alloy, inhibiting dendrite growth, and excellent toughness properties Effect

Pending Publication Date: 2022-05-10
有研金属复材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, domestic studies on the use of deformed aluminum alloys to prepare aluminum alloy castings have been frequently reported, but they are still in the laboratory research stage. Substitute forging has important practical significance for expanding the application range of ultra-high strength and toughness aluminum alloys

Method used

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  • Ultrahigh-toughness cast aluminum alloy and forming method thereof
  • Ultrahigh-toughness cast aluminum alloy and forming method thereof
  • Ultrahigh-toughness cast aluminum alloy and forming method thereof

Examples

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preparation example Construction

[0050] The preparation method specifically comprises the following steps:

[0051] (1) Raw material preparation: use high-purity metal Al, high-purity metal Zn, high-purity metal Mg, high-purity Al-Cu master alloy, high-purity Al-Zr master alloy and high-purity Al-Sc master alloy as raw materials, according to Al -The weight percentage of Zn-Mg-Cu-Zr-Sc alloy composition: Zn 7.6~8.6%, Mg 1.8~2.4%, Cu 1.1~1.7%, Zr 0.1~0.2%, Sc 0.1~0.2%, the rest is Al, And the unavoidable impurity Fe content≤0.06%, Si content≤0.06%, and the total amount of other impurities≤0.15%.

[0052] Wherein, the Cu content in the Al-Cu master alloy is 30-50% by mass percentage, and the balance is Al;

[0053] The Zr content in the Al-Zr master alloy is 3-5% by mass percentage, and the balance is Al;

[0054] The content of Sc in the Al-Sc master alloy is 1-2% by mass percentage, and the balance is Al.

[0055] (2) Alloy smelting: Mix the above metals and intermediate alloys for smelting at a melting te...

Embodiment 1

[0064] A high strength and toughness casting Al-8.14Zn-1.93Mg-1.56Cu-0.11Zr-0.13Sc alloy, its chemical composition (wt.%) is: Zn 8.14, Mg 1.93, Cu 1.56, Zr 0.11, Sc 0.13, and The amount is Al.

[0065] Preparation methods include:

[0066] (1) Raw material preparation: Al, Mg and Zn are added in the form of high-purity metals, and alloying elements Cu, Zr, and Sc are all added in the form of high-purity aluminum-based master alloys;

[0067] (2) Alloy smelting: using resistance furnace and graphite crucible, after the metal materials (pure Al and its intermediate alloys Al-50Cu, Al-5Zr, Al-2Sc) are completely melted during smelting, metal Zn and Mg are covered with aluminum foil Finally, use a bell jar to press into the bottom and keep stirring to completely melt. In order to fully melt the existing coarse intermetallic compound particles in the master alloy, the melting temperature was set at 780°C and the holding time was 20min.

[0068] (3) Alloy refining: after the temp...

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Abstract

The invention provides an ultrahigh-toughness cast aluminum alloy and a forming method thereof. The ultrahigh-toughness cast aluminum alloy comprises the following components in percentage by mass: 7.6%-8.6% of Zn, 1.8%-2.4% of Mg, 1.1%-1.7% of Cu, 0.1%-0.2% of Zr, 0.1%-0.2% of Sc and the balance of Al and inevitable impurities. Wherein in the inevitable impurities, the content of Fe is less than or equal to 0.06%, the content of Si is less than or equal to 0.06%, and the total amount of the other impurities According to the high-toughness cast aluminum alloy, the tensile strength is larger than or equal to 600 MPa, the yield strength is larger than or equal to 520 MPa, the ductility is larger than or equal to 10%, forging is replaced with casting, and a wrought aluminum alloy in the prior art can be replaced.

Description

technical field [0001] The invention relates to the technical field of high-performance cast aluminum alloy materials and processing thereof, in particular to an ultra-high-strength cast aluminum alloy and a forming method thereof. Background technique [0002] At present, high-strength and tough aluminum alloys mainly include 2XXX and 7XXX series of traditional deformed aluminum alloys, as well as powder metallurgy aluminum alloys, spray-formed aluminum alloys, aluminum-based composites, and superplastic aluminum alloys developed on the basis of them. Due to poor casting formability, defects such as shrinkage porosity and pores are unavoidable under conventional casting conditions. Therefore, the current 7XXX series Al-Zn-Mg-Cu high-strength and toughness deformed aluminum alloys are all forged, rolled and extruded parts. However, high-performance complex castings cannot be directly obtained by casting methods. [0003] With the continuous expansion of the application fiel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/03C22F1/053
CPCC22C21/10C22C1/03C22C1/026C22F1/053
Inventor 高志华徐永涛王亚宝张志峰白月龙李豹
Owner 有研金属复材技术有限公司
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