High-thermal-stability Al alloy and preparation process thereof

A technology with high thermal stability and preparation technology, which is applied in the field of high thermal stability aluminum alloy and its preparation technology, can solve the problems of poor thermal stability and lower mechanical properties of products, so as to maintain mechanical properties, increase thermal stability, increase The effect of billet extrusion deformation

Active Publication Date: 2018-12-07
山东创新精密科技有限公司
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Problems solved by technology

[0003] However, the existing aluminum alloy products have poor thermal stability. When the temperature exceeds 200°C, the mechanical properties of the product will drop sharply, which will cause great inconvenience to the normal use of the product at high temperature.

Method used

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Effect test

Embodiment １

[0024] An aluminum alloy with high thermal stability, the aluminum alloy contains the following components by weight: 1.5% Mg, 0.8% Zr, 3% Cu, 0.6% Si, 0.05% B, 0.6% Fe, 1% Ni, Ti 0.8%, Mo 1%, Cr≤0.02%, rare earth elements 0.5%, and the balance is aluminum.

[0025] A preparation process of high thermal stability aluminum alloy comprises the following steps:

[0026] (1) Melting, deslagging, degassing, and pouring to obtain aluminum alloy ingots; the melting temperature is 800-920°C, and during the smelting process, a refining agent is added consisting of the following components by weight: KCl 2 45 parts, MgCl 2 45 parts, CaF 2 10 parts, Na 2 CO 3 10 parts, Na 2 SO 4 10 parts, Na 3 AlF 6 2 parts; inert gas is introduced during the slag removal process.

[0027] (2) Homogenization treatment: heat the aluminum alloy ingot to 520°C for homogenization treatment, and keep it warm for 10 hours.

[0028] (3) Extrusion, extrusion temperature: 400°C, extrusion speed 20m...

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Abstract

The invention discloses a high-thermal-stability Al alloy and a preparation process thereof. The Al alloy comprises the following components by weight ratio: 1-2% of Mg, 0.2-1% of Zr, 2-4% of Cu, 0.2-1% of Si, 0.01-0.1% of B, 0.5-1% of Fe, 0.1-2% of Ni, 0.5-1% of Ti, 0.1-2% of Mo, no more than 0.02% of Cr, 0.2-1% of a rare-earth element, and the balance Al. The Al alloy prepared through the preparation process disclosed by the invention has the beneficial effects that a conventional Al alloy preparation process is improved; the thermal stability is high; and the stable mechanical properties can still be kept in a high-temperature environment.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy preparation technology, in particular to an aluminum alloy with high thermal stability and a preparation process thereof. Background technique [0002] The current commercialized aluminum alloy products have excellent processing performance, mechanical properties and high corrosion resistance, which meet the requirements of electrical products and heat exchange products. Therefore, they are widely used in the fields of electrical engineering and heat exchange. [0003] However, the existing aluminum alloy products have poor thermal stability. When the temperature exceeds 200° C., the mechanical properties of the product decrease sharply, which causes great inconvenience to the normal use of the product at high temperature. [0004] Therefore, how to improve the existing aluminum alloy preparation process so that it can still maintain stable mechanical properties at high temperatures is a te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/16C22C21/14C22C1/02C22C1/06C22F1/057
CPCC22C1/026C22C1/06C22C21/14C22C21/16C22F1/057
Inventor 崔立新赵晓光吴胜利郑文超褚文科李士河成凯
Owner 山东创新精密科技有限公司
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