Preparation method of high-quality AlV55 alloy

A high-quality, alloyed technology, applied in the field of metallurgy, to achieve the effect of reducing carbon content, reducing contact, and avoiding excessive heat concentration

Inactive Publication Date: 2017-01-25
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In order to solve the problems existing in the production of vanadium-aluminum alloys by the existing electric thermite method, the present invention proposes an electrothermal reduction-two-step refining method to prepare vanadium-aluminum alloys

Method used

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  • Preparation method of high-quality AlV55 alloy
  • Preparation method of high-quality AlV55 alloy
  • Preparation method of high-quality AlV55 alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Mix 3kg of vanadium trioxide, 2.75kg of aluminum, and 1.92kg of calcium oxide, take out 1 / 4 of the raw materials, mix in potassium chlorate as the base material, make the calorific value of the base material reach 3100kJ / kg, put the base material into the furnace and ignite After the molten pool is stabilized, lower the electrode to smelt, and then add the remaining raw materials in batches. After all the raw materials are filled, spray 32.4g of aluminum-calcium alloy into the molten slag, let it stand for 5min, and spray 185g of alloy into the alloy. Refining agent, let stand for 10min. After the reaction, 3.46kg of vanadium-aluminum alloy was obtained, the recovery rate of vanadium reached 97.01%, and the alloy impurity content reached the AlV50 vanadium-aluminum alloy standard of German GfE company. The main components of the alloy are shown in Table 1.

[0033] V Al Fe Si C P Cr 57.15 42.35 0.14 0.10 0.07 0.015 0.006 S B Cu Mg ...

Embodiment 2

[0035] Mix 10kg of vanadium trioxide, 9.3kg of aluminum, and 6.6kg of calcium oxide, take out 1 / 4 of the raw materials, mix in potassium chlorate as the base material, make the calorific value of the base material reach 3100kJ / kg, put the base material into the furnace and ignite After the molten pool is stabilized, lower the electrodes and smelt with electricity, and then add the remaining raw materials in batches. After all the raw materials are filled, spray 100g of aluminum-calcium alloy into the molten slag, let it stand for 6 minutes, and spray 500g of alloy into the alloy for refining. agent, let it stand for 15 minutes. After the reaction finished, 11.5kg of vanadium-aluminum alloy was obtained, the recovery rate of vanadium reached more than 97%, and the alloy impurity content reached the AlV50 vanadium-aluminum alloy standard of German GfE company. The main components of the alloy are shown in Table 2.

[0036] V Al Fe Si C P Cr 57.81 41.72 0....

Embodiment 3

[0038]Mix 5kg of vanadium trioxide, 4.6kg of aluminum, and 3.3kg of calcium oxide, take out 1 / 5 of the raw materials, mix in potassium chlorate as the base material, make the calorific value of the base material reach 3200kJ / kg, put the base material into the furnace and ignite After the molten pool is stabilized, lower the electrode to smelt, and then add the remaining raw materials in batches. After all the raw materials are filled, spray 50g of aluminum-calcium alloy into the molten slag, let it stand for 5min, and spray 300g of alloy into the alloy for refining. agent, let it stand for 10 minutes. After the reaction finished, 5.74kg of vanadium-aluminum alloy was obtained, the recovery rate of vanadium reached more than 97%, and the alloy impurity content reached the AlV50 vanadium-aluminum alloy standard of German GfE company. The main components of the alloy are shown in Table 3.

[0039] V Al Fe Si C P Cr 56.85 42.71 0.13 0.08 0.06 0.011 0.00...

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Abstract

The invention belongs to the field of metallurgy, and particularly relates to a preparation method of high-quality vanadium-aluminum alloy. The preparation method comprises the following steps: by an electrothermal reduction-two-step refining method, using V2O3 with the purity of 99.9%, Al with the purity of 99.70% and CaO with the purity of 97.0% as raw materials, uniformly mixing, taking a part of the raw materials, and mixing with a heating agent as a base material; igniting the base material to form a molten pool, starting an open arc for smelting, and adding the remaining raw materials in batches; in the later reacting stage, performing blowing refining on the alloy and molten slag; after completion of smelting, deslagging, and casting to obtain the vanadium-aluminum alloy. According to the preparation method, high-purity V2O3 is used as a vanadium source, so that compared with use of V2O5, the using amount of a reducing agent can be significantly reduced and introduction of impurities into the raw materials is reduced; an external heat source can prolong the heat-preserving time so as to promote separation of the slag and the alloy; the open arc is started for smelting by virtue of the molten slag, so that the carbon content of the alloy can be reduced; in the later smelting stage, the recycling rate is increased and the impurity content is reduced by refining the slag and the alloy. The final impurity content meets a standard of the AlV50 vanadium-aluminum alloy of the German GfE company.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to an electrothermal reduction-two-step refining method for preparing high-quality AlV55 alloy. Background technique [0002] The representative titanium alloy represented by Ti-6Al-4V has the characteristics of high specific strength, high thermal strength, and good corrosion resistance. It is an extremely important lightweight structural material and has important strategic significance in aerospace, national defense and military tools. As an important additive in the production of titanium alloys, vanadium-aluminum alloys are crucial to the production of titanium alloys in terms of their quality and yield. However, the traditional one-step and two-step smelting processes have problems such as low metal recovery, high impurity content, long process, and high cost. Therefore, a high-quality vanadium-aluminum 55 with short process, low cost and independent intellectual property...

Claims

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Application Information

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IPC IPC(8): C22B4/06C22B5/04
Inventor 刘奎仁陈建设韩庆高腾跃马朝辉
Owner NORTHEASTERN UNIV
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