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A kind of hot crack-resistant al-cu series cast aluminum alloy and preparation method thereof

A casting aluminum alloy, anti-hot cracking technology, applied in the field of casting alloys, can solve the problems of poor alloy casting performance, difficulty in improving the yield and application range, and large hot cracking tendency

Active Publication Date: 2021-09-14
LANZHOU FLIGHT CONTROL
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  • Abstract
  • Description
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Problems solved by technology

However, due to its following disadvantages: although it has high strength, the casting performance of the alloy is very poor, which shows a large tendency of hot cracking, difficult feeding, and it is difficult to improve the yield and application range

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  • A kind of hot crack-resistant al-cu series cast aluminum alloy and preparation method thereof
  • A kind of hot crack-resistant al-cu series cast aluminum alloy and preparation method thereof

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Embodiment Construction

[0022] The following introduces some of the many possible implementation cases of the present invention, aiming to provide a basic understanding of the present invention, but not intended to identify the key or decisive elements of the present invention or to limit the scope of protection.

[0023] The application provides the following technical solutions:

[0024] The percentages by weight of the components in the Al-Cu cast aluminum alloy with excellent thermal cracking resistance and high elongation in this example are: Cu: 5%, Mn: 1.1%, Ti: 0.30%, B: 0.01%, V: 0.01%, the balance is Al.

[0025] The process of the preparation method is as follows: dissolving and refining the raw materials to obtain an alloy solution; pouring the aluminum alloy solution into a mold, and obtaining an alloy casting after cooling; performing solid solution treatment on the obtained alloy casting; aging treatment, and finally carry out cold and hot cycle treatment on the casting after aging tr...

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Abstract

The invention proposes a thermal-cracking-resistant Al-Cu series cast aluminum alloy and a preparation method thereof, aiming at the problem of hot cracking of Al-Cu-based cast aluminum alloys with high copper content, by adding various strengthening elements and inhibiting elements, the strength of the material is improved. Increase the elongation and reduce the solidification temperature range during the pouring process, while increasing the grain boundary dragging effect. The percentages of each component and weight in Al-Cu cast aluminum alloy are: Cu: 4%-6%, Mn: 0.7%-1.5%, Ti: 0.1%-0.4%, B: 0.005%-0.06%, V : 0.005% to 0.030%, the balance being Al. By increasing the content ratio of Mn element in Al-Cu-based casting alloy, the dispersed particles of MnAl16 compound are formed and distributed along the grain boundary, which hinders the growth of recrystallized grains; at the same time, iron impurities are melted to form (Fe, Mn)Al16 compound, reducing Harmful effects of small iron. Significantly improved the hot cracking resistance and elongation of Al-Cu series casting alloy.

Description

technical field [0001] The invention relates to a casting alloy, in particular to a thermal-cracking-resistant Al-Cu series casting aluminum alloy and a preparation method thereof, which improves material performance and expands market application prospects. Background technique [0002] Al-Cu cast aluminum alloy is a typical high-strength and high-toughness alloy with excellent comprehensive mechanical properties. It has high strength, good ductility and plasticity, and excellent high-temperature performance and machinability. It is currently mainly used as a military and Civilian structural materials have great application prospects in aviation, aerospace, and automotive wheel industries. However, since the Al-Cu cast aluminum alloy has a wide crystallization temperature range, and there is Al with poor plasticity in the eutectic structure during solidification 2 Cu phase, easy to crack. At the same time, due to the different solidification speeds of structural parts dur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/12C22F1/057C22C1/03
CPCC22C1/03C22C21/12C22F1/002C22F1/057
Inventor 王军阳冯延泽杨世林
Owner LANZHOU FLIGHT CONTROL
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