Aluminum niobium boron intermediate alloy and preparation method and application thereof

A master alloy and niobium alloy technology, applied in the field of aluminum niobium boron master alloy, can solve the problems of lack of improvement of castings, weakening and refining effect, poor internal cleanliness, etc., and achieve comprehensive mechanical performance improvement, obvious improvement, and service performance guarantee. Effect

Active Publication Date: 2018-12-18
山东云信铝业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing representative refiner is aluminum titanium boron refiner, however, the titanium element in this refiner will react with silicon in the aluminum-silicon casting alloy with high silicon content to form TiSi phase and TiSi phase. 2 phase, thereby weakening the TiB 2 The formation of particles weakens the refinement effect and produces poisoning, which limits its application
Application No. 2017100434606 discloses an aluminum-niobium-boron master alloy refining agent, in which the boron content is 1-5%. However, the aluminum-niobium master alloy of the refining agent has obvious burning loss, many impurities, and internal cleanliness The hardness is poor, and the B compound has obvious poisonous effect on the aluminum alloy products in the later stage, and there is still a lack of improvement for the casting

Method used

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  • Aluminum niobium boron intermediate alloy and preparation method and application thereof
  • Aluminum niobium boron intermediate alloy and preparation method and application thereof
  • Aluminum niobium boron intermediate alloy and preparation method and application thereof

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Effect test

Embodiment 1

[0036] The aluminum-niobium-boron master alloy includes 2.8% niobium, 0.3% boron and the rest aluminum, and the aforementioned percentages are mass percentages.

[0037] The preparation method of the above-mentioned aluminum-niobium-boron master alloy is as follows:

[0038] 1) Put 1100kg of aluminum ingots (99.97%) into an electromagnetic induction furnace for melting, and heat up after melting;

[0039] 2) After the temperature reaches 1120°C, add 91.5kg of Al-Nb 60 master alloy (Nb: 60%wt) for melting, the addition time of Al-Nb 60 master alloy is 5min, and then add 700kg of aluminum ingot (99.97%) for melting cool down;

[0040] 3) After cooling down to 740°C, add 69.2kg of potassium fluoroborate (B: 8.5%) to react for 13 minutes, then raise the temperature to 850°C and dump the acid slag, and then add 10KG of light calcium carbonate to remove the slag;

[0041] 4) After the slag cleaning is completed, transfer the furnace to the casting furnace, and start refining and d...

Embodiment 2

[0047] The aluminum-niobium-boron master alloy includes 3% niobium, 0.2% boron and the rest aluminum, and the aforementioned percentages are mass percentages.

[0048] The preparation method of the above-mentioned aluminum-niobium-boron master alloy is as follows:

[0049] 1) Put 1100kg of aluminum ingots (99.97%) into an electromagnetic induction furnace for melting, and heat up after melting;

[0050] 2) Add 97.14kg of aluminum-niobium 60 master alloy (Nb: 60%wt) after the temperature reaches 1120°C for melting, the addition time of aluminum-niobium 60 master alloy is 5min, and then add 700kg of aluminum ingot (99.97%) for melting , cooling;

[0051] 3) After cooling down to 740°C, add 45.71kg of potassium fluoroborate (B: 8.5%) to react for 14 minutes, then raise the temperature to 850°C and dump the acid slag, and then add 10KG of light calcium carbonate to remove the slag;

[0052]4) After the slag cleaning is completed, transfer the furnace to the casting furnace, and ...

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Abstract

The invention discloses an aluminum niobium boron intermediate alloy and a preparation method and application thereof. The aluminum niobium boron intermediate alloy comprises the components of, by mass, 2.0-3.5% of niobium (Nb), 0.1-0.99% of boron (B) and the balance aluminum. The aluminum niobium boron intermediate alloy has a uniform structure, small fineness and very low impurity contents, andcan effectively avoid metal loss, so that the cleanliness of the interior of the alloy is guaranteed, oxidation impurities are reduced, and the comprehensive mechanical property of later castings canbe obviously improved; the preparation method is simple and easy to operate, and the metal loss can be effectively avoided, so that cleanliness of the interior of the alloy is guaranteed to ensure theusing property of the intermediate alloy; and the dosage is less and the improvement effect on the castings is obvious during using.

Description

technical field [0001] The invention relates to an aluminum-niobium-boron master alloy, a preparation method and an application thereof, and belongs to the field of master alloys. Background technique [0002] Refining as-cast grains is one of the important means to improve the strength and toughness of products in subsequent deep processing. With the continuous development of automobile lightweight and the gradual implementation of the national energy conservation and emission reduction strategy, the application of lightweight alloys represented by aluminum and its alloys is becoming more and more extensive. Refinement treatment of aluminum and its alloys can improve the mechanical properties of aluminum and its alloys. The existing representative refiner is aluminum titanium boron refiner, however, the titanium element in this refiner will react with silicon in the aluminum-silicon casting alloy with high silicon content to form TiSi phase and TiSi phase. 2 phase, thereb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03
CPCC22C1/026C22C1/03C22C21/00
Inventor 葛红星杨全海葛庆琪
Owner 山东云信铝业科技有限公司
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