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High-performance Al-Ti-V-B alloy refiner and preparation method and application thereof

A technology of al-ti-v-b and refining agent, which is applied in the field of aluminum alloy processing, can solve the problems of changing furnace temperature, cumbersome process, reducing refining efficiency, etc., and achieves industrial production improvement, simplified preparation process and high refining effect Effect

Active Publication Date: 2021-10-26
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ability of Al-V-B to refine α-Al grains needs to be improved, and the existing process for preparing Al-V-B refiners is relatively cumbersome, requiring multiple changes in furnace temperature, and consumes a lot of energy
The new Al-Nb-B refiner also has good refinement ability but NbAl 3 , NbB 2 Equal refinement particles are easy to settle and fail, making the refinement effect unstable or even invalid
In addition, the Al-Ti-Nb-B refining agent developed and prepared by the patent number CN108220703A can refine the grain size of α-Al to below 450 μm, however, (Ti,Nb)B 2 and (Ti,Nb)Al 3 Agglomeration of particles may reduce refinement efficiency, remains to be resolved

Method used

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  • High-performance Al-Ti-V-B alloy refiner and preparation method and application thereof
  • High-performance Al-Ti-V-B alloy refiner and preparation method and application thereof
  • High-performance Al-Ti-V-B alloy refiner and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1A

[0029] The preparation method of embodiment 1Al-1Ti-2V-3B refiner

[0030] Al-1Ti-2V-3B refiner composition: in terms of mass percentage: Ti: 1.0wt.%; V: 2.0wt.%, B: 3.0wt.%, and the unavoidable impurity content is less than 0.1wt.%, The balance is Al. Weigh the raw materials respectively according to the composition of the refiner.

[0031] The preparation steps of Al-1Ti-2V-3B refiner:

[0032] (1) After melting Al at 750-780°C, add V powder and KBF after heating to 830°C 4 Powder and K 2 TiF 6 Powder mixture, stirred for 60s every 15min and heated for 130min to obtain a uniform Al-1Ti-2V-3B alloy melt;

[0033] (2) Cast the alloy melt obtained in step (1) into a cast iron mold preheated at 200° C., and solidify to obtain an Al-1Ti-2V-3B refiner.

[0034] Al-1Ti-2V-3B refiner refining Al-8Si alloy method:

[0035] Put 300 grams of Al-8Si alloy into a graphite crucible and heat and melt it in a resistance furnace at 750°C, then add 4.5g of Al-1Ti-2V-3B refiner, stir an...

Embodiment 2

[0039] Al-1Ti-2V-3B refiner refining Al-5Si alloy method:

[0040] Put 300 grams of Al-5Si alloy into a graphite crucible and heat and melt it in a resistance furnace at 750°C, then add 4.5g of the Al-1Ti-2V-3B refiner prepared by the method in Example 1, after stirring and holding at 720°C for 45min The mixed melt is obtained, and then poured into a cast iron mold preheated at 200° C. for solidification to obtain a refined Al-5Si alloy ingot. The α-Al grain size of the refined Al-5Si alloy is about 154 μm.

Embodiment 3

[0041] The preparation method of embodiment 3Al-2Ti-2V-4B refiner

[0042] Al-2Ti-2V-4B refiner composition: in terms of mass percentage: Ti: 2.0wt.%; V: 2.0wt.%, B: 4.0wt.%, and the unavoidable impurity content is less than 0.1%, the balance for Al. Weigh the raw materials respectively according to the composition of the refiner.

[0043] The preparation steps of Al-2Ti-2V-4B refiner:

[0044] (1) After melting Al at 750-780°C, add V powder and KBF after heating to 800°C 4 Powder and K 2 TiF 6 Powder mixture, stirring for 80s every 20min and heating reaction for 150min to obtain a uniform Al-2Ti-2V-4B alloy melt;

[0045] (2) Cast the alloy melt obtained in step (1) into a cast iron mold preheated at 250° C., and solidify to obtain an Al-2Ti-2V-4B refiner.

[0046] The method of refinement Al-8Si alloy of Al-2Ti-2V-4B refiner adopts the same method as Al-1Ti-2V-3B refiner refinement Al-8Si alloy in embodiment 1, Al-2Ti- The effect of 2V-4B refining Al-8Si alloy is as a...

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Abstract

The invention discloses a high-performance Al-Ti-V-B alloy refiner and a preparation method and application thereof. The Al-Ti-V-B alloy comprises the following chemical elements, by mass, 0.5-3.0 wt% of Ti, 1.0-4.0 wt% of V, 1.0-6.0 wt% of B, less than 0.1 wt% of inevitable impurities and the balance Al, and the Al-Ti-V-B alloy consists of an Al matrix and TiAl3, VAl3, VB2, TB2 and AlB2 phase grains with the size of 1 to 100 micrometers. According to the Al-Ti-V-B refiner prepared by adopting the methods of melting, heating, blending, stirring, pouring and the like, the grain size of alpha-Al in the cast aluminum-silicon alloy can be refined to be below 160 microns; and therefore, the Al-Ti-V-B alloy has a remarkable refining effect on alpha-Al grains in the cast aluminum-silicon alloy, the preparation method is simple and convenient to implement, the cost is relatively low, and the Al-Ti-V-B alloy is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy processing, and in particular relates to a high-performance Al-Ti-V-B alloy refiner and its preparation method and application. Background technique [0002] Cast aluminum-silicon alloys are widely used in the fields of automobiles, rail transit, construction, and aerospace due to their excellent casting properties and good mechanical properties. The grain refinement of cast aluminum-silicon alloy plays a significant role in improving the compactness and mechanical properties of the alloy, and is of great significance to further expand its application range. At present, Al-5Ti-B refiner is the most commonly used in industrial cast aluminum alloy. However, in aluminum-silicon alloys with silicon content greater than 5wt.%, due to the poisoning effect of silicon, the refining ability of Al-5Ti-B is reduced. Therefore, it is necessary to develop new aluminum-silicon alloy refining agents to m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/06C22C1/10C22C1/03
CPCC22C21/00C22C21/003C22C1/1036C22C1/06
Inventor 贾海龙薛利文朴一男赵玉桥赵海冬曲岩查敏王慧远
Owner JILIN UNIV
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