A kind of preparation method of aerospace grade vanadium aluminum alloy

A vanadium-aluminum alloy and aerospace technology, applied in the field of alloys, can solve problems such as complex process, poor distribution uniformity, and high cost, and achieve the effects of reducing costs, reducing smelting spatter, and saving raw materials

Active Publication Date: 2019-07-05
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems existing in the preparation method of aerospace-grade vanadium-aluminum alloy in the prior art, such as complicated process, easy splashing in the smelting process, poor distribution uniformity, high impurity content, complicated process and high cost, the present invention provides a low-impurity and Preparation method of aerospace-grade vanadium-aluminum alloy with uniform composition

Method used

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preparation example Construction

[0055] The specific embodiment part of the present invention provides a kind of preparation method of aerospace grade vanadium aluminum alloy, and described method comprises the following steps:

[0056] (1) Mix vanadium pentoxide, metal aluminum and slagging agent evenly and place them in an electric arc furnace for electrode heating and smelting to obtain vanadium-aluminum alloy ingots;

[0057] (2) After separating the vanadium-aluminum alloy ingot obtained in step (1) from the slag, crushing to obtain a vanadium-aluminum alloy block;

[0058] (3) Vacuum refining is carried out after mixing the vanadium-aluminum alloy block obtained in step (2) with metal aluminum to obtain aerospace-grade vanadium-aluminum alloy.

[0059] Further, the method includes the following steps:

[0060] (1) Use magnesia bricks and vanadium-aluminum slag to tie the furnace lining of the smelting furnace, and then 1 to 1.5 parts of vanadium pentoxide particles with a particle size of 3 to 20 mm an...

Embodiment 1

[0070] This embodiment provides a method for preparing aerospace-grade vanadium-aluminum alloy, the method comprising the following steps:

[0071] (1) 400 kg of vanadium pentoxide particles with a particle size of 8 to 10 mm, 330 kg of metal aluminum particles with a particle size of 8 to 10 mm and a purity of ≥99.8 wt%, and 25 kg of slagging agent calcium fluoride with a purity of ≥99.5 wt% are evenly mixed Place it in a smelting furnace for electrode heating and smelting at 1670°C for 8 minutes to obtain a vanadium-aluminum alloy ingot;

[0072] (2) After the vanadium-aluminum alloy ingot obtained in step (1) is separated from the slag, it is crushed to a particle size of 10 mm to 20 mm to obtain a vanadium-aluminum alloy block. The composition of the vanadium-aluminum alloy block obtained by analysis is calculated as: V 64.55 by mass percentage wt%, Fe0.31wt%, Si 0.28wt%, C 0.11wt%, O 0.08wt%, the rest is Al;

[0073] (3) Take 50kg of vanadium-aluminum alloy blocks obtain...

Embodiment 2

[0076] This embodiment provides a method for preparing aerospace-grade vanadium-aluminum alloy, the method comprising the following steps:

[0077] (1) After mixing 400kg of vanadium pentoxide particles with a particle size of 3mm to 5mm, 330kg of aluminum particles with a particle size of 5mm to 8mm and a purity of ≥99.8wt%, and 25kg of slagging agent calcium fluoride with a purity of ≥99.5wt%, Place it in a smelting furnace for electrode heating and smelting at 1650°C for 8 minutes to obtain a vanadium-aluminum alloy ingot;

[0078] (2) After the vanadium-aluminum alloy ingot obtained in step (1) is separated from the slag, it is crushed to a particle size of 10 mm to 20 mm to obtain a vanadium-aluminum alloy block. The composition of the vanadium-aluminum alloy block obtained by analysis is calculated as: V 64.45 by mass percentage wt%, Fe0.28wt%, Si 0.29wt%, C 0.12wt%, O 0.09wt%, the rest is Al;

[0079] (3) Take 50kg of vanadium-aluminum alloy blocks obtained in step (2)...

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Abstract

The invention provides a manufacturing method of an aerospace-level vanadium-aluminum alloy. The method comprises the following steps: (1) uniformly mixing vanadium pentoxide, metallic aluminum and a slag former and performing electrode heating smelting in a smelting furnace to obtain a vanadium-aluminum alloy ingot; (2) separating the vanadium-aluminum alloy ingot from furnace slag and afterwards crushing to obtain a vanadium-aluminum alloy block; and (3) mixing the vanadium-aluminum alloy block with the metallic aluminum and afterwards performing vacuum refining to obtain the aerospace-level vanadium-aluminum alloy. According to the method provided by the invention, the state of raw materials is controlled, electrode heating and smelting is adopted, the materials are fed by stages in the vacuum refining process and the angle of a crucible is rotated continuously so that the finally obtained vanadium-aluminum alloy is low in content of impurities, high in purity and uniform and compact in ingredients, and moreover the uniformity is also guaranteed.

Description

technical field [0001] The invention belongs to the field of alloys, and relates to a preparation method of aerospace-grade vanadium-aluminum alloy, in particular to a preparation method of aerospace-grade vanadium-aluminum alloy with low impurities and uniform composition. Background technique [0002] Two important alloys in titanium alloys are Ti-6Al-4V and Ti-8Al-1Mo-1V, which together account for 50% of the titanium alloy market and can be used to produce jet engines, high-speed aircraft skeletons and rocket engine casings Wait. Vanadium is usually added to titanium alloys in the form of Al-V master alloys. At present, the production method of vanadium-aluminum alloy commonly used in China is: build a high-temperature smelting furnace and a furnace cover with graphite plates, and then manually mix powdered vanadium pentoxide and aluminum powder in a certain proportion and put them into the reaction furnace , then ignited and smelted, cooled naturally for 24 hours, man...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C27/02C22C1/03C22C14/00
CPCC22C1/02C22C1/03C22C14/00C22C27/025
Inventor 李兰杰万贺利李九江杨丽丽张苏新
Owner HEBEI IRON AND STEEL
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