Cast aluminum-zinc-magnesium-copper-tantalum alloy and manufacturing method thereof

A technology of tantalum alloy and casting aluminum, which is applied in the field of casting aluminum-zinc-magnesium-copper-tantalum alloy and its preparation, to achieve the effect of improving alloy strength, strong nucleation ability, and uniform distribution

Inactive Publication Date: 2015-12-16
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to obtain ideal microstructure and high mechanical properties, this type of alloy needs to undergo plastic deformation processes such as extrusion and forging (so it is called deformed aluminum alloy), which requires complex production equipment and production processes and a long production cycle. , so the production cost is very high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] The aluminum-zinc-magnesium-copper alloy not containing tantalum element was prepared by the preparation method of the present invention, in order to compare with the examples and investigate the strengthening effect of tantalum element.

[0024] The properties of alloys prepared in Comparative Examples and Examples are listed in Table 1. It can be seen that the alloy containing tantalum element in the present invention has higher tensile strength than the alloy without tantalum element (both under the same heat treatment state), indicating that the addition of tantalum element plays a strengthening role.

Embodiment 1

[0032] Aluminum-zinc-magnesium-copper-tantalum alloy composition: Ta0.045%, Mg2.4%, Cu2.2%, Zn8%, cerium-rich mixed rare earth 0.0009%, the rest is Al and inevitable impurity elements.

[0033] The preparation process of the above-mentioned aluminum-zinc-magnesium-copper-tantalum alloy is:

[0034] (1) According to the chemical composition and quality of the aluminum-zinc-magnesium-copper-tantalum alloy to be prepared, weigh the following raw materials of corresponding quality: pure aluminum (purity 99.7wt.% or above), Al-50wt.%Zn intermediate Alloy, Al-50wt.%Cu master alloy, Al-40wt.%Mg master alloy, Al-15wt.%Ta (containing 0.3% cerium-rich mixed rare earth) master alloy;

[0035] (2) Put pure aluminum, Al-50wt.%Zn master alloy and Al-50wt.%Cu master alloy into the crucible to melt, adjust the alloy melt temperature to 710℃, add Al-40wt.%Mg alloy, stir and melt body to make the composition of the alloy uniform, and then add refining agents for refining; at the same time as t...

Embodiment 2

[0039] Aluminum-zinc-magnesium-copper-tantalum alloy composition: Ta0.09%, Mg2.9%, Cu1.7%, Zn10%, cerium-rich mixed rare earth 0.0018%, the rest is Al and inevitable impurity elements.

[0040] The preparation process of the above-mentioned aluminum-zinc-magnesium-copper-tantalum alloy is:

[0041] (1) According to the chemical composition and quality of the aluminum-zinc-magnesium-copper-tantalum alloy to be prepared, weigh the following raw materials of corresponding quality: pure aluminum (purity 99.7wt.% or above), Al-50wt.%Zn intermediate Alloy, Al-50wt.%Cu master alloy, Al-40wt.%Mg master alloy, Al-15wt.%Ta (containing 0.3% cerium-rich mixed rare earth) master alloy;

[0042] (2) Put pure aluminum, Al-50wt.%Zn master alloy and Al-50wt.%Cu master alloy into the crucible to melt, adjust the alloy melt temperature to 720°C, add Al-40wt.%Mg alloy, stir and melt body to make the alloy composition uniform, and then add refining agent for refining; at the same time, preheat the ...

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Abstract

Cast aluminum-zinc-magnesium-copper-tantalum alloy is formed by following ingredients, by weight percentage, of 0.02-0.51% of Ta, 1.5-3% of Mg, 1.5-2.5% of Cu, 6-10% of Zn, 0.0004-0.0102% of cerium-enriched mischmetal and the balance of Al. The invention also provides a manufacturing method for the cast aluminum-zinc-magnesium-copper-tantalum alloy. According to the cast aluminum-zinc-magnesium-copper-tantalum alloy, tantalum element is dissolved in aluminum grain in an atom manner along with magnesium element and copper element in a solid manner to generate a solid solution strengthening function. Furthermore, TaAl3-xZnx particles are formed and dispersed in an aluminum base body to generate a dispersion strengthening function. The particles have strong nucleation ability on aluminum grain, the aluminum grain is refined, and a refined crystalline strengthening effect is generated. The refined crystalline strengthening effect can enable zinc, magnesium, copper and compound to be distributed more evenly, microcosmic ingredient segregation is reduced, and the alloy strength is further improved.

Description

Technical field [0001] The present invention involves a cast aluminum-zinc-magnesium-copper-pupae alloy and its preparation method containing TA elements, which belongs to the technology field of metal alloy materials. Background technique [0002] 7XX Al-Zn-MG-CU alloy as a class of high-strength aluminum alloys is widely used in aerospace, vehicles, machinery, and other fields.However, in order to obtain the ideal organizational structure and high mechanical properties, such alloys need to be squeezed and forged plastic deformation processes (so are called deformation aluminum alloy), which requires complex production outfits and production processes and long production cycles.Therefore, production costs are extremely high.The cast alloy has the advantages of simple production technology, performance and organizations with different orientation, and easy -to -produce products, but the mechanical properties such as strength are much lower than that of aluminum alloy.Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/03
Inventor 王振卿任浩赵德刚左敏杨中喜
Owner UNIV OF JINAN
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