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Method for smelting vanadium-based alloy

An alloy, vanadium-based technology, applied in the field of smelting vanadium-based alloys, can solve problems such as the melting point temperature difference between vanadium and aluminum elements, the volatilization loss of aluminum elements, and the increase in secondary costs, so as to reduce element or phase segregation, and promote crystal grains. The effect of refinement, reduction of shrinkage and porosity

Inactive Publication Date: 2017-12-22
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although this method greatly improves the performance of the master alloy product and can meet the needs of modern preparation of high-performance materials for aerospace and other applications, there is a huge gap in the melting point temperature of vanadium and aluminum, which causes aluminum volatilization loss during the vacuum refining process Very serious, causing secondary cost increase
At the same time, the solidification process is prone to problems such as element segregation, which leads to some problems when used as a raw material for super performance alloy materials

Method used

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  • Method for smelting vanadium-based alloy
  • Method for smelting vanadium-based alloy
  • Method for smelting vanadium-based alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A method for preparing a 55 vanadium aluminum alloy block by electric thermite-ultrasonic refining is carried out according to the following process steps:

[0062] (1) In terms of molar percentage, 11.87% V 2 o 5 , 84.63% Al and 3.50% CaF 2 Put the mixture into the reaction tank, ignite and heat with a carbon electrode, the ignition temperature is 1000°C, so that the aluminothermic reduction reaction proceeds, the reaction time is 0.5h, and the reaction temperature reaches 1800-1900°C;

[0063] (2) After the reduction reaction described in step (1) ends, the reaction tank is static for 3 minutes, and a transducer is used to carry out an ultrasonic refining treatment on the bottom of the reaction tank, the time is 5 minutes, and the power is 1000W; then the reaction tank is static for 5 minutes, and the sedimentation process is carried out ;

[0064] (3) After the sedimentation treatment described in step (2), carry out the secondary ultrasonic refining treatment, th...

Embodiment 2

[0070] A method for refining and preparing 65 vanadium aluminum alloy blocks is carried out according to the following process steps:

[0071] (1) In terms of molar percentage, 12.38% V 2 o 5 , 83.77% Al and 3.85% CaF 2 Put the mixture into the reaction tank, ignite and heat with a carbon electrode, the ignition temperature is 1200°C, so that the aluminothermic reduction reaction proceeds, the reaction time is 0.8h, and the reaction temperature reaches 1900-1950°C;

[0072] (2) After the reduction reaction described in step (1) ends, the reaction tank is static for 5 minutes, and a transducer is used to carry out an ultrasonic refining treatment on the bottom of the reaction tank, the time is 8 minutes, and the power is 900W; then the reaction tank is static for 5 minutes, and the sedimentation process is carried out ;

[0073] (3) After the sedimentation treatment described in step (2), carry out the secondary ultrasonic refining treatment, the time is 12min, and the power...

Embodiment 3

[0079] A kind of refining preparation FeV 80 The method for the intermediate alloy block is carried out according to the following process steps:

[0080] (1) In terms of molar percentage, 4.91% V 2 o 5 , 20.27% V 2 o 3 , 63.58% Al, 7.66% Fe and 3.68% CaCO 3 Put the mixture into the reaction tank, ignite and heat with a carbon electrode, the ignition temperature is 1300°C, so that the aluminothermic reduction reaction proceeds, the reaction time is 4h, and the reaction temperature reaches 1900-1950°C;

[0081](2) After the reduction reaction described in step (1) ends, the reaction tank is static for 5 minutes, and a transducer is used to carry out an ultrasonic refining treatment on the bottom of the reaction tank, the time is 10 minutes, and the power is 800W; then the reaction tank is static for 5 minutes, and the sedimentation process is carried out ;

[0082] (3) After the sedimentation treatment described in step (2), carry out the secondary ultrasonic refining tre...

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Abstract

The invention relates to a method for smelting a vanadium-based alloy. The method comprises the steps that a vanadium source, a reduction agent and a slag former are mixed and are placed in a reaction tank, and ignition for the reduction reaction is carried out; after the reaction is finished, the bottom of the reaction tank is subject to primary ultrasonic refining treatment, and the reaction tank is fixed and subject to sedimentation treatment; after sedimentation is finished, secondary ultrasonic refining treatment is carried out, and sedimentation treatment is continuously carried out; third-time ultrasonic refining treatment is carried out, and sedimentation treatment is continuously carried out; ultrasonic refining treatment and reaction tank static sedimentation treatment are alternatively carried out until molten alloy is solidified, and the vanadium-based alloy is obtained. The alloy raw material performance is improved while the production period is not prolonged, the alloy A-grade product rate is increased, the use amount of the reduction agent is reduced, and the comprehensive economic benefit is improved. The method can be applied to other metal heat reduction processes, a high-purity uniform middle alloy raw material can be produced, and can be widely applied to the high-technology industry of aerospace, nuclear energy and the like, and the good application prospect is achieved.

Description

technical field [0001] The invention relates to the technical field of metallurgical engineering, in particular to a method for smelting vanadium alloys. Background technique [0002] As an important national strategic resource, vanadium metal is widely used in metallurgy, aerospace, nuclear energy and chemical industry, among which 95% of metal vanadium is used in alloy fields such as metallurgy, aerospace and nuclear energy. Vanadium-based master alloys are important raw materials for preparing special steel and titanium alloy / super alloy materials. In order to achieve the best performance of special alloys, the preparation of high-purity and homogenized master alloys becomes a key factor. Therefore, the preparation of high-quality vanadium-based master alloys is One of the focuses of current research. [0003] At present, the main production and preparation methods of vanadium-based master alloys mainly include silicothermal method, aluminothermic method, aluminothermic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C27/02
CPCC22C1/02C22C27/025
Inventor 王娜白瑞国张娜李东明吴春亮王宝华
Owner HEBEI IRON AND STEEL
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