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Method for preparing titanium-aluminum alloy

A technology of titanium-aluminum alloy and alkaline earth metal, which is applied in the field of preparation of titanium-aluminum alloy, can solve the problems of long process flow, high manufacturing cost of titanium-aluminum alloy, high technology of impurity elements, etc., achieve continuous and stable operation, avoid incomplete reduction, good Effects of Industrialization Prospects

Active Publication Date: 2018-12-18
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are three main methods for producing titanium-aluminum alloy: aluminum powder thermal reduction method, direct alloying method and oxide electrolyte deoxidation method, among which direct alloying method is the main method for producing titanium-aluminum alloy in industry, and its preparation process is: alloy Melting, smelting-solidification, and heat treatment, but the process is long and requires multiple smelting to eliminate the segregation of alloy elements, resulting in extremely expensive manufacturing costs of titanium-aluminum alloys, while the other two methods have high technical problems with impurity elements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add a certain amount of NaCl and KCl in an equimolar ratio to the reaction vessel, add NaF (NaF accounts for 20wt% of the total electrolyte) and vacuum dehydrate at 300°C for 5h, then heat up to 750°C under an argon atmosphere to melt the electrolyte, and the mass TiCl in a ratio of 4:1 4 and AlCl 3 Slowly put in the molten salt from the feeding tube, TiCl 4 and AlCl 3 The amount of addition is carried out according to the stoichiometric formula (1), and then the graphite rod is used as the anode, the carbon steel rod is used as the cathode, and the electrolysis voltage is controlled to be 3.2V to carry out electrolysis. After the electrolysis is completed, the cathode product is transferred to the vacuum furnace, and the vacuum degree Distill at 0.1Pa and 1100°C for 6 hours, take it out after cooling, and use ICP to analyze the content of Ti and Al in the product, which are 82.4wt% and 16.6% respectively, and about 1% impurities, mainly due to partial oxidation of th...

Embodiment 2

[0039] A certain amount of equimolar ratio of NaCl and CaCl 2 Put it into the reaction vessel, add KF (KF accounted for 30wt% of the total amount of electrolyte) and vacuum dehydrate at 300°C for 5h, then raise the temperature to 850°C under a helium atmosphere to melt the electrolyte, and TiCl with a mass ratio of 1:1 4 and AlCl 3 Slowly put in the molten salt from the feeding tube, TiCl 4 and AlCl 3 The amount of addition is carried out according to the stoichiometric formula (1), and then the graphite rod is used as the anode, the carbon steel rod is used as the cathode, the electrolysis voltage is controlled at 3.1V, and the initial current density of the cathode and anode is respectively 0.2A / cm 2 and 0.25A / cm 2Implement electrolysis. After the electrolysis is over, transfer the cathode product to a vacuum furnace, control the vacuum degree <0.1Pa and distill at 1300°C for 6 hours, take it out after cooling, and use ICP to analyze the Ti and Al contents in the product,...

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Abstract

The invention belongs to the field of titanium metallurgy, and particularly relates to a method for preparing a titanium-aluminum alloy. The method for preparing the titanium-aluminum alloy comprisesthe following steps that a, TiCl4 and AlCl3 are added into a fused electrolyte under a protective atmosphere, wherein the fused electrolyte a mixture of one or more of alkali metal chloride or alkaline earth metal chloride and alkali metal fluoride; b, a mixing system obtained in the step a is electrolyzed; and c, after electrolysis is finished, a cathode product is subjected to vacuum distillation, and thus the titanium-aluminum alloy is obtained. According to the method for preparing the titanium-aluminum alloy, the preparing process of the titanium-aluminum alloy can be shortened, the manufacturing cost of the titanium-aluminum alloy is lowered, and the important practical significance for development of a titanium alloy is achieved.

Description

technical field [0001] The invention belongs to the field of titanium metallurgy, and in particular relates to a method for preparing titanium-aluminum alloy. Background technique [0002] With the upgrading of aerodynamic devices, the internal ambient temperature of aerospace engines is gradually increasing. The current mature nickel-based alloys can no longer meet the high-temperature working requirements. Because titanium-aluminum alloy has excellent high temperature resistance and corrosion resistance, it can replace nickel. Base alloys are used as lightweight and high-strength structural parts in the fields of aerospace, automobiles, and precision manufacturing. Titanium-aluminum-based intermetallic compounds have regular atomic arrangement, strong metal bond and covalent bonding force, and have light weight, high temperature oxidation resistance and creep resistance, and can be used as high temperature resistant and corrosion resistant special coatings Raw materials, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/36C25C7/02C25C7/00C25C7/06
CPCC25C3/36C25C7/005C25C7/025C25C7/06C22B9/04C22B9/02Y02P10/20C22C1/02C25C3/28C22C14/00C25C3/06C25C3/125C22C21/003
Inventor 朱福兴马尚润
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD