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Cobaltiferous aluminum alloy material and preparation thereof

A technology of aluminum alloy materials and alloy components, applied in the field of aluminum alloy materials, can solve the problems of general heat treatment hardenability and other problems, and achieve the effects of improving heat treatment hardenability, heat treatment hardenability and high strength.

Active Publication Date: 2009-04-22
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these alloys have the problem of general or even poor heat treatment hardenability, and their hardened thickness generally does not exceed 150mm, which cannot meet the urgent needs of the current aviation manufacturing industry for large-section semi-finished products, and limits the further application of this series of alloys in the aviation field.

Method used

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  • Cobaltiferous aluminum alloy material and preparation thereof
  • Cobaltiferous aluminum alloy material and preparation thereof

Examples

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Effect test

Embodiment 1

[0044] Al-6.2Zn-2.5Mg-1.9Cu-0.14Zr-0.07Co (wt%) alloy was prepared by ingot metallurgy. The raw materials used are high-purity aluminum, industrial pure magnesium, industrial pure zinc, aluminum-copper master alloy, magnesium-zirconium master alloy, and aluminum-cobalt master alloy. The melting furnace is a resistance heating furnace, and the casting machine is a vertical semi-continuous casting machine. The melting and casting process adopted is: furnace loading (putting high-purity aluminum into the melting furnace) → melting (adding industrial pure zinc, aluminum-copper master alloy, magnesium-zirconium master alloy, and aluminum-cobalt master alloy into the melting furnace, and then melting)→ Slag removal→processing industrial pure magnesium (adding industrial pure magnesium into the melting furnace)→stirring→sampling for component analysis→adjusting components→stirring→refining (725°C)→slagging→standstill (10 minutes)→casting, among which, The casting temperature is 705°...

Embodiment 2

[0046] Al-6.2Zn-2.5Mg-1.9Cu-0.14Zr-0.11Co (wt%) alloy was prepared by ingot metallurgy. The raw materials used are high-purity aluminum, industrial pure magnesium, industrial pure zinc, aluminum-copper master alloy, magnesium-zirconium master alloy, and aluminum-cobalt master alloy. The melting furnace is a resistance heating furnace, and the casting machine is a vertical semi-continuous casting machine. The melting and casting process adopted is: furnace loading (putting high-purity aluminum into the melting furnace) → melting (adding industrial pure zinc, aluminum-copper master alloy, magnesium-zirconium master alloy, and aluminum-cobalt master alloy into the melting furnace, and then melting)→ Slag removal→processing industrial pure magnesium (adding industrial pure magnesium into the melting furnace)→stirring→sampling for component analysis→adjusting components→stirring→refining (725°C)→slagging→standstill (10 minutes)→casting, among which, The casting temperature is 705°...

Embodiment 3

[0048] Al-6.2Zn-2.5Mg-1.9Cu-0.14Zr-0.25Co (wt%) alloy was prepared by ingot metallurgy. The raw materials used are high-purity aluminum, industrial pure magnesium, industrial pure zinc, aluminum-copper master alloy, magnesium-zirconium master alloy, and aluminum-cobalt master alloy. The melting furnace is a resistance heating furnace, and the casting machine is a vertical semi-continuous casting machine. The melting and casting process adopted is: furnace loading (putting high-purity aluminum into the melting furnace) → melting (adding industrial pure zinc, aluminum-copper master alloy, magnesium-zirconium master alloy, and aluminum-cobalt master alloy into the melting furnace, and then melting)→ Slag removal→processing industrial pure magnesium (adding industrial pure magnesium into the melting furnace)→stirring→sampling for component analysis→adjusting components→stirring→refining (725°C)→slagging→standstill (10 minutes)→casting, among which, The casting temperature is 705°...

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Abstract

The invention provides a Al-Zn-Mg-Cu-Zr-Co aluminum alloy, which relates to the technical field of metal alloy. The alloy is characterized by comprising the following chemical compositions in weight percentage: 6 to 8 weight percent of Zn, 1 to 3 weight percent of Mg, 1.0 to 2.6 weight percent of Cu, 0.1 to 0.25 weight percent of Zr, 0.07 to 0.5 weight percent of Co, and the balance being Al. The key point of the alloy is to add Co element with certain amount in the prior 7xxx series aluminum alloy; the method for preparing the novel aluminum alloy is to add a Al-Co intermediate alloy which is subject to vacuum melting in the Al-Zn-Mg-Cu-Zr alloy. The alloy has high strength, toughness and corrosion resistance, simultaneously has excellent thermal treatment hardenability, and can be applied to production of semi-finished products with large dimension. The material can be used in key large main load-carrying structural members in aero-space, transportation, war industry and other fields.

Description

technical field [0001] The invention relates to an aluminum alloy material, in particular to a cobalt-containing aluminum alloy material and a preparation method thereof. Background technique [0002] As the most typical lightweight material among metal materials, aluminum alloy has the advantages of low specific gravity, easy processing, and low cost, and has always been a key dual-use material for military and civilian use. [0003] 7xxx series aluminum alloy is the general term for Al-Zn-Mg-Cu series aluminum alloys, and it is also the type with the highest strength among various deformed aluminum alloys that have been successfully commercialized at present. 7xxx series aluminum alloy pre-stretched plates are various A key intermediate product for the manufacture of large monolithic structural components used in civil and military aircraft, ground and marine vehicles. With the development of the whole machine, the comprehensive performance requirements of large integral ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/02C22F1/053
Inventor 张永安熊柏青李志辉朱宝宏王锋刘红伟李锡武
Owner GRIMAT ENG INST CO LTD
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