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Aluminum alloy compound inoculant and preparation method thereof

A composite inoculant and composite inoculation technology, applied in the field of aluminum alloy inoculants, can solve problems such as restricting the application and promotion of Sc-containing aluminum alloys, high prices, and increased alloy costs, so as to avoid coarsening and segregation, low cost, The effect of small burn loss

Inactive Publication Date: 2015-02-25
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although adding a small amount of Sc to the Zr, Ti composite inoculant can effectively improve and avoid the coarsening and segregation of the second phase particles, and give full play to the grain refinement effect of the Zr, Ti composite inoculant, but the rare earth Sc The price is very expensive, even adding a small amount of Sc elements will greatly increase the cost of the alloy, thus greatly restricting the application and promotion of Sc-containing aluminum alloys, and the current research on Sc-containing aluminum alloys is still in the experimental research stage , not yet put into industrial production

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

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Experimental program
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Effect test

Embodiment 1

[0026] According to the chemical composition range of the inoculant of the present invention, the required compound inoculant is processed and prepared, and the preparation process is as follows:

[0027] According to the designed chemical composition ratio: La 0%, Zr 0%, Ti10%, Al90%, weigh the domestic raw materials Al-20La, Al-10Zr and Al-10Ti master alloy for batching. Put all the prepared ingredients into a vacuum high-frequency electromagnetic oscillating electric arc furnace, and pump the vacuum degree in the furnace to 6×10 -2 Pa~8×10 -3 Pa, then pass 0.05MPa high-purity argon into the smelting vacuum chamber, and then set the furnace temperature to a predetermined temperature until the ingredients are all melted, and then keep the temperature for 5 minutes under electromagnetic vibration. When the melt is kept warm for the specified time, it is poured into a quartz mold in a liquid nitrogen cooling environment to prepare a master alloy composite inoculant.

Embodiment 2

[0029] According to the chemical composition range of the inoculant of the present invention, the required compound inoculant is processed and prepared, and the preparation process is as follows:

[0030] According to the designed chemical composition ratio: La 0%, Zr 5%, Ti 5%, Al90%, weigh the domestic raw materials Al-20La, Al-10Zr and Al-10Ti master alloy for batching. Put all the prepared ingredients into a vacuum high-frequency electromagnetic oscillating electric arc furnace, and pump the vacuum degree in the furnace to 6×10 -2 Pa~8×10 -3 Pa, then pass 0.05MPa high-purity argon gas into the smelting vacuum chamber, and then set the furnace temperature to a predetermined temperature until the ingredients are all melted, and then keep it for 5 minutes under electromagnetic vibration. When the melt is kept warm for the specified time, it is poured into a quartz mold in a liquid nitrogen cooling environment to prepare a master alloy composite inoculant.

Embodiment 3

[0032] According to the chemical composition range of the inoculant of the present invention, the required compound inoculant is processed and prepared, and the preparation process is as follows:

[0033] According to the designed chemical composition ratio: La 5%, Zr 5%, Ti 5%, Al 85%, weigh the domestic raw materials Al-20La, Al-10Zr and Al-10Ti master alloy for batching. Put all the prepared ingredients into a vacuum high-frequency electromagnetic oscillating electric arc furnace, and pump the vacuum degree in the furnace to 6×10 -2 Pa~8×10 -3 Pa, then pass 0.05MPa high-purity argon into the smelting vacuum chamber, and then set the furnace temperature to a predetermined temperature until the ingredients are all melted, and then keep it for 5 minutes under electromagnetic vibration. When the melt is kept warm for the specified time, it is poured into a quartz mold in a liquid nitrogen cooling environment to prepare a master alloy composite inoculant.

[0034] The Al-La-Zr-Ti 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: 3-8 percent of La, 3-8 percent of Zr, 5-12 percent of Ti and the balance of Al. The preparation method comprises the following steps: weighing raw material intermediate alloys including Al-20La, Al-10Zr and Al-10Ti for batching according to a set composition proportion, performing high-frequency electromagnetic oscillation on the melt in a vacuum environment, and performing rapid solidification treatment, thereby preparing the compound inoculant used for aluminum alloy grain refinement. The aluminum alloy compound inoculant disclosed by the invention has the advantages that the compound inoculant consists of four elements including Al, La, Zr and Ti, does not contain any precious metal, is low in cost and is low in burning loss and high in stability in the metamorphic process; and moreover, further grain refinement is realized, so that the aluminum alloy structure is completely changed into fine and uniform isometric crystals, and the mechanical property of the aluminum alloy is obviously 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, and is mainly used for refining the grain structure of the aluminum alloy and improving the comprehensive mechanical properties of the aluminum alloy. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal material in industrial production. With its unique performance characteristics, it has been widely used in the fields of aerospace, automobile and shipbuilding, electrical engineering and electronics. With the continuous development of high-tech fields, higher-level requirements are put forward for the microstructure and mechanical properties of aluminum alloy materials. However, due to the early casting process of aluminum alloys, coarse and uneven grain structures are easy to appear and accompanied by Defects such as pores and cracks cause the alloy performanc...

Claims

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Application Information

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