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Aluminum alloy compound inoculant and preparation method thereof

A compound inoculant and compound inoculation technology, applied in the field of aluminum alloy inoculants, can solve the problems of poor resistance to grain refinement and recession, poor long-term effect of refinement, and unsatisfactory refining effect, so as to improve the resistance to grain refinement. The effect of degradation performance, not easy to roughen, and improved mechanical properties

Inactive Publication Date: 2015-03-04
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when Ti or Zr is added alone, the refinement effect is not ideal, and the resistance to grain refinement decline is poor (poor refinement long-term effect), and there are still great limitations in the use of Ti or Zr alone as an aluminum alloy inoculant

Method used

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  • Aluminum alloy compound inoculant and preparation method thereof
  • Aluminum alloy compound inoculant and preparation method thereof
  • Aluminum alloy compound inoculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] According to the chemical composition range of the inoculant of the present invention, the required composite inoculant has been processed and prepared, and the preparation process is as follows:

[0029] According to the designed chemical composition ratio: Ti 10%, Zr 0%, Al90%, the domestic raw materials Al-10Ti master alloy and Al-10Zr master alloy are weighed for batching. Put all the prepared ingredients into the vacuum high-frequency electromagnetic oscillating electric arc furnace, and pump the vacuum to 6×10 -2 Pa~6×10 -3 Pa, and then feed 0.05MPa high-purity argon gas into the smelting vacuum chamber, and then set the furnace temperature to a predetermined temperature until all the ingredients are melted, and then keep warm for 5 minutes under electromagnetic vibration. After the melt is kept warm for a specified time, it is poured into a quartz mold under a liquid nitrogen cooling environment to prepare an intermediate alloy composite inoculant.

Embodiment 2

[0031] According to the chemical composition range of the inoculant of the present invention, the required composite inoculant has been processed and prepared, and the preparation process is as follows:

[0032] According to the designed chemical composition ratio: Ti 0%, Zr 10%, Al 90%, the domestic raw materials Al-10Ti master alloy and Al-10Zr master alloy are weighed for batching. Put all the prepared ingredients into the vacuum high-frequency electromagnetic oscillating electric arc furnace, and pump the vacuum to 6×10 -2 Pa~6×10 -3 Pa, then feed 0.06MPa high-purity argon gas into the smelting vacuum chamber, and then set the furnace temperature to a predetermined temperature until all the ingredients are melted, and then keep warm for 10 minutes under electromagnetic vibration. After the melt is kept warm for a specified time, it is poured into a quartz mold under a liquid nitrogen cooling environment to prepare an intermediate alloy composite inoculant.

Embodiment 3

[0034] According to the chemical composition range of the inoculant of the present invention, the required composite inoculant has been processed and prepared, and the preparation process is as follows:

[0035] According to the designed chemical composition ratio: Ti 5%, Zr 5%, Al 90%, the domestic raw materials Al-10Ti master alloy and Al-10Zr master alloy are weighed for batching. Put all the prepared ingredients into the vacuum high-frequency electromagnetic oscillating electric arc furnace, and pump the vacuum to 6×10 -2 Pa~6×10 -3 Pa, then feed 0.06MPa high-purity argon gas into the smelting vacuum chamber, and then set the furnace temperature to a predetermined temperature until all the ingredients are melted, and then keep warm for 8 minutes under electromagnetic vibration. After the melt is kept warm for a specified time, it is poured into a quartz mold under a liquid nitrogen cooling environment to prepare an intermediate alloy composite inoculant.

[0036] The com...

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Abstract

The invention discloses an aluminum alloy compound inoculant and a preparation method thereof. The aluminum alloy compound inoculant comprises the following components in percentage by mass: 4%-10% of Ti, 4%-10% of Zr and the balance of Al. The preparation method comprises the following steps: weighing raw materials (Al-10Ti intermediate alloy and Al-10Zr intermediate alloy) according to a set component ratio and burdening; carrying out high-frequency electromagnetic oscillation treatment on a melt in a vacuum environment; and then carrying out rapid solidification treatment to prepare the compound inoculant for refining aluminum alloy crystals. The compound inoculant disclosed by the invention comprises three elements Al, Ti and Zr, does not contain precious metal, and is relatively low in cost, small in burning loss and good in stability in a metamorphic process; further refining of crystals is achieved; and an aluminum alloy texture is completely transformed into fine and uniform isometric crystal, so that the mechanical property of the aluminum alloy is significantly improved.

Description

technical field [0001] The invention belongs to the field of aluminum alloy inoculants, and specifically relates to an aluminum alloy composite inoculant and a preparation method thereof, which are mainly used for refining the grain structure of aluminum alloys, improving the comprehensive mechanical properties of aluminum alloys, and significantly improving the resistance of the inoculants. Grain refinement decay performance. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal material in industrial production. It not only has the characteristics of low density, high specific strength, high specific stiffness and excellent thermal conductivity, but also has good electrical conductivity, easy forming and good resistance Stress corrosion performance has been widely used in aviation, aerospace, automobile, shipbuilding, machinery manufacturing and chemical industry and other fields. With the continuous development of high-tech fields, higher...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C1/03C22C21/00
Inventor 杨成刚余爱武黄忠宝冀海贵
Owner NANCHANG HANGKONG UNIVERSITY