Aluminum-niobium-tantalum intermediate alloy and preparing method thereof

A technology of master alloy and niobium tantalum, applied in the field of aluminum niobium tantalum master alloy and its preparation, can solve the problems of titanium alloy quality influence, refractory metal, poor alloy uniformity, etc., to improve uniform stability, meet production requirements, and improve The effect of production requirements

Active Publication Date: 2019-11-05
CHENGDE TIANDA VANADIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Niobium and tantalum are metal elements in titanium alloys. The addition of niobium and tantalum in the production of domestic titanium alloys is mainly in the form of simple metals, and there will be the following problems: the cost of single metals of niobium and tantalum is too high; niobium and tantalum are refractory metals, And the melting point is very high; the uniformity of titanium alloy composition is not good, and the titanium alloy ingot will have large segregation, which cannot meet the requirements of titanium alloy preparation
The advantages of the above two methods are simple equipment, convenient operation, and low investment. The disadvantages are that the uniformity of the alloy is poor, and impurity elements, especially gas phase impurity elements such as oxygen and nitrogen, cannot be controlled, which directly affects the quality of titanium alloys.

Method used

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  • Aluminum-niobium-tantalum intermediate alloy and preparing method thereof
  • Aluminum-niobium-tantalum intermediate alloy and preparing method thereof
  • Aluminum-niobium-tantalum intermediate alloy and preparing method thereof

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preparation example Construction

[0023] The present invention provides a method for preparing an aluminum-niobium-tantalum master alloy described in the above scheme, comprising the following steps:

[0024] (1) Mix tantalum pentoxide, niobium pentoxide and aluminum for aluminothermic reaction, and obtain an aluminum-niobium-tantalum primary alloy after cooling;

[0025] (2) Vacuum smelting the aluminum-niobium-tantalum primary alloy and aluminum, and obtaining an aluminum-niobium-tantalum master alloy after cooling.

[0026] In the invention, tantalum pentoxide, niobium pentoxide and aluminum are mixed for aluminothermic reaction, and the primary alloy of aluminum, niobium and tantalum is obtained after cooling. In the present invention, an exothermic agent is preferably added to the mixture of the tantalum pentoxide, niobium pentoxide and aluminum; the exothermic agent is preferably potassium chlorate. In the present invention, the mass ratio of the tantalum pentoxide, niobium pentoxide and aluminum is pre...

Embodiment 1

[0034] 1. Aluminum thermal smelting process

[0035] (1) Dry the aluminum powder, niobium pentoxide, tantalum pentoxide, and potassium chlorate at a drying temperature of 120° C. for 12 hours.

[0036] (2) Raw material ratio: 68.06kg of aluminum powder, 15.65kg of niobium pentoxide, 42.74kg of tantalum pentoxide, and 25.00kg of potassium chlorate. Put the raw materials into a V-shaped mixer and mix them well to ensure the contact between raw materials full.

[0037] (3) Put the uniformly mixed charge into the sintered corundum crucible, ignite and react, and after cooling for 6 hours, remove the crucible, take out the alloy ingot, and weigh it.

[0038] (4) After removing the slag layer and oxide film on the surface of the alloy ingot, crush and finish it to 5-50 mm, and obtain the primary alloy of aluminum, niobium and tantalum after magnetic separation and manual selection.

[0039] 2. Vacuum melting process

[0040] (1) The aluminum powder and the primary alloy of alumin...

Embodiment 2

[0047] 1. Aluminum thermal smelting process

[0048] (1) Dry the aluminum powder, niobium pentoxide, tantalum pentoxide, and potassium chlorate at a drying temperature of 120° C. for 12 hours.

[0049] (2) Raw material ratio: 68.88kg of aluminum powder, 13.37kg of niobium pentoxide, and 42.74kg of tantalum pentoxide. Put the raw materials into a V-shaped mixer and mix them well to ensure sufficient contact between raw materials.

[0050] (3) Put the uniformly mixed charge into the sintered corundum crucible, ignite and react, and after cooling for 6 hours, remove the crucible, take out the alloy ingot, and weigh it.

[0051] (4) After removing the slag layer and oxide film on the surface of the alloy ingot, crush and finish it to 5-50 mm, and obtain the primary alloy of aluminum, niobium and tantalum after magnetic separation and manual selection.

[0052] 2. Vacuum melting process

[0053] (1) Dry the aluminum powder and the primary alloy at a temperature of 120° C. and a d...

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Abstract

The invention provides an aluminum-niobium-tantalum intermediate alloy and a preparing method thereof and relates to the technical field of metal materials. The aluminum-niobium-tantalum intermediatealloy comprises, by mass, 8.0%-12.0% of Nb, 30.0%-34.0% of Ta and the balance Al. due to component and content control, the components of the aluminum-niobium-tantalum intermediate alloy are uniform,segregation is small, when the titanium alloy is smelted, titanium alloy component homogenization is facilitated, and component segregation is prevented. The preparing method of the aluminum-niobium-tantalum intermediate alloy is provided. The aluminum-niobium-tantalum intermediate alloy is prepared through a two-step method, namely the two steps of the thermit reaction and vacuum smelting are conducted. By means of the preparing method, homogenization stability of the components of the aluminum-niobium-tantalum intermediate alloy can be improved, the content of impurities of O, N and the likeis reduced, and the requirement for titanium alloy production can be better met.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to an aluminum-niobium-tantalum master alloy and a preparation method thereof. Background technique [0002] Titanium and its alloys have excellent properties, such as corrosion resistance, high temperature resistance, low temperature resistance, high strength, non-magnetic, etc., and have good comprehensive process performance. They have gradually become irreplaceable materials in the field of modern industrial science and technology. Aerospace industry, ship manufacturing industry, chemical industry, electric power industry, metallurgical industry, textile industry, food industry, medical industry, vehicle manufacturing industry, sports and leisure industry and other fields have a wide range of applications. [0003] Niobium and tantalum are metal elements in titanium alloys. The addition of niobium and tantalum in the production of domestic titanium alloys is mainly in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C21/00C22C14/00C22B5/04
CPCC22B5/04C22C1/026C22C1/03C22C14/00C22C21/00
Inventor 王志军刘强刘志彬孙鑫段善博
Owner CHENGDE TIANDA VANADIUM IND
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