Method for preparing aerospace-level vanadium-aluminium alloy

A vanadium-aluminum alloy and aerospace technology, applied in the field of preparing aerospace-grade vanadium-aluminum alloy, can solve the problems of complex process and high cost

Active Publication Date: 2014-06-11
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of my country's aerospace industry, a lot of research has been done on aerospace-grade vanadium-aluminum alloy in China in recent years, but there are still problems such as complex process and high cost.
[0004] For example, Chinese patent application No. 201110080517.2 discloses a method for preparing a high-purity aluminum-vanadium master alloy. The method uses nitrogen or argon as a carrier to uniformly spray an aluminum melt with a refining agent into the melt for refining to remove At the same time, there are requirements for the flow rate of nitrogen or argon, the amount of refining agent, the temperature, etc., and the coverin...

Method used

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  • Method for preparing aerospace-level vanadium-aluminium alloy
  • Method for preparing aerospace-level vanadium-aluminium alloy
  • Method for preparing aerospace-level vanadium-aluminium alloy

Examples

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preparation example Construction

[0024] The preparation method of the vanadium aluminum alloy according to the exemplary embodiment of the present invention comprises the following steps:

[0025] a. If figure 1 As shown, corundum fine powder 3 with a particle size of less than 5 mm is laid on the bottom of the smelting furnace, and a cylindrical plate 2 (such as a cylindrical steel ring) with a diameter smaller than the diameter of the smelting furnace is vertically placed in the smelting furnace and placed toward the cylindrical plate 2 The cavity formed between the furnace shell 1 and the inner wall of the smelting furnace is filled with corundum fine powder 3 to form a protective layer on the bottom and wall of the smelting furnace to prevent the molten metal in the furnace from directly contacting the furnace shell, and then take it out Cylindrical plate 2.

[0026] b. The aluminothermic method is used for smelting, and the vanadium pentoxide, metal aluminum and coolant are evenly mixed and loaded into ...

example 1

[0037] First, lay corundum fine powder with a particle size of less than 5mm on the bottom of the smelting furnace, put a cylindrical steel ring with a diameter smaller than the diameter of the smelting furnace into the smelting furnace, and fill the cavity formed between the steel ring and the inner wall of the smelting furnace with corundum fine powder to form a protective layer with a thickness of 280mm on the furnace bottom and furnace wall of the smelting furnace, wherein the corundum fine powder is the slag produced by the smelting of the vanadium-titanium alloy crude product in the previous furnace, and the particle size obtained by grinding and screening is less than 5mm powder.

[0038] Then, 150Kg high-purity powdered vanadium pentoxide (purity 99.5wt%, particle size 0.5-1mm), 100Kg aluminum powder (purity 99.7wt%, particle size 0.1-0.5mm) and 28Kg coolant powder were mixed evenly Then put it into the smelting furnace and ignite to obtain the crude vanadium-aluminum ...

example 2

[0045] First, lay corundum fine powder with a particle size of less than 5mm on the bottom of the smelting furnace, put a cylindrical plate with a diameter smaller than the diameter of the smelting furnace into the smelting furnace, and insert it into the cavity formed between the cylindrical plate and the inner wall of the smelting furnace Fill the corundum fine powder to form a protective layer with a thickness of 300mm on the furnace bottom and furnace wall of the smelting furnace, wherein the corundum fine powder is the slag produced by smelting the crude vanadium-titanium alloy in the previous furnace after grinding and screening obtained powder.

[0046] Then mix 160Kg powdered vanadium pentoxide (purity 99.5wt%, particle size 0.5-0.8mm), 100Kg aluminum powder (purity 99.7wt%, particle size 0.1-0.3mm) and 32Kg coolant powder evenly before loading into the smelting furnace and ignited to obtain crude vanadium-aluminum alloys, wherein the coolant is alloy fine powder with ...

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Abstract

The invention provides a method for preparing an aerospace-level vanadium-aluminium alloy. The method comprises the following steps: uniformly mixing vanadium pentoxide, metallic aluminium and a coolant, putting into a smelting furnace, igniting and smelting to obtain a vanadium-aluminium alloy with the vanadium content of 75-85wt% and slag; adding the vanadium-aluminium alloy obtained through the smelting into a vacuum induction furnace, adding aluminum, remelting and refining to obtain the aerospace-level vanadium-aluminium alloy with the vanadium content of 45-55wt%, wherein the mass ratio of the added aluminum to the added vanadium-aluminium alloy is 0.45-0.77. The method provided by the invention has the advantages that the aerospace-level vanadium-aluminium alloy can be obtained; the smelting furnace does not need to be knotted and only simple filling is carried out by using corundum fine powder with the particle size less than 5mm, the furnace body can be protected and the requirements for smelting the vanadium-aluminium alloy through aluminothermy are satisfied, so that the production cost is reduced and the method is simple in operation.

Description

technical field [0001] The invention relates to the field of preparation of vanadium-aluminum alloys, and more specifically, relates to a method for preparing aerospace-grade vanadium-aluminum alloys. Background technique [0002] As an important additive of titanium alloy, vanadium-aluminum alloy can be used to improve the performance of titanium alloy, making it more advantageous in terms of strength, toughness, formability, corrosion resistance, and high temperature resistance. At present, the two most widely used vanadium-containing titanium alloys are Ti-6Al-4V (containing 4wt%V) and Ti-8Al-1Mo-1V. These two alloys account for about 50% of the titanium alloy market and are mainly used in the production of jet Engines, high-speed aircraft skeletons and rocket engine casings, etc. [0003] Domestically produced vanadium-aluminum alloys are mainly used for civilian use. So far, the aerospace-grade vanadium-aluminum alloy market is still dominated by subsidiaries of forei...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C27/02C22B5/04C22B9/16C22B9/04
CPCY02P10/25
Inventor 尹丹凤孙朝晖陈海军鲜勇邓孝伯王永钢李海丰
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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