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Preparation method of multicomponent microalloying aluminium alloy containing titanium, zirconium and scandium

A technology of microalloying and manufacturing method, which is applied in the field of aluminum alloy manufacturing, can solve the problems of strong water absorption of scandium chloride, high cost, and high burning loss rate of scandium, so as to reduce oxide inclusions and hydrogen content, and reduce additive costs , the effect of reducing production costs

Inactive Publication Date: 2006-05-10
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aluminum-scandium master alloys are usually prepared by the following three methods: metal scandium is used as the raw material and prepared by the method of doping, the burning rate of scandium is large and the cost is high; the process of scandium fluoride and scandium oxide aluminothermic reduction is complicated and the cost is high The advantage of scandium chloride melt thermal reduction method is that the reduction temperature is low and can be carried out in an ordinary resistance furnace. The disadvantage is that scandium chloride has strong water absorption and will produce scandium oxychloride that cannot be completely reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Titanium dioxide, zirconium dioxide, scandium trioxide and aluminum oxide are added to an industrial electrolyzer to produce a multi-component microalloyed aluminum alloy with a mass fraction of 0.01% Ti, 0.06% Zr and 0.26% Sc.

[0023] The mass fraction of each component of the electrolyte in the cryolite system is: Molecular ratio (NaF:AlF 3 ) 2.30, sodium fluoride (NaF) 45.0%, aluminum fluoride (AlF 3 )39.0%, calcium fluoride (CaF 2 ) 4.0%, magnesium fluoride (MgF 2 ) 2.0%, alumina (Al 2 o 3 )3.5%, titanium oxide (TiO 2 )0.05%, zirconia (ZrO 2 )0.10%, scandium oxide (Sc 2 o 3 ) 1.6%, the balance is unavoidable impurities;

[0024] The electrolysis process parameters are: electrolysis temperature 948°C, electrolytic cell working voltage 4.18V, aluminum liquid height 22cm, electrolyte height 18cm, electrode distance 4.2cm;

[0025] The target mass fraction of each (component) element in the multi-element microalloyed aluminum alloy containing titanium, zirconi...

Embodiment 2

[0027] Titanium dioxide, zirconium dioxide and aluminum oxide are added to an industrial electrolyzer to produce a multi-component microalloyed aluminum alloy with a mass fraction of 0.05% Ti and 0.45% Zr.

[0028] The mass fraction of each component of the electrolyte in the cryolite system is: Molecular ratio (NaF:AlF 3 ) 2.64, sodium fluoride (NaF) 48.0%, aluminum fluoride (AlF 3 )36.3%, calcium fluoride (CaF 2 )4.9%, magnesium fluoride (MgF 2 ) 4.6%, alumina (Al 2 o3 )3.5%, titanium oxide (TiO 2 )0.10%, zirconia (ZrO 2 )0.50%, the balance is unavoidable impurities;

[0029] The electrolysis process parameters are: electrolysis temperature 959°C, electrolytic cell working voltage 4.01V, aluminum liquid height 19cm, electrolyte height 20cm, electrode distance 4.0cm;

[0030] The target mass fraction of each (component) element in the multi-element microalloyed aluminum alloy containing titanium, zirconium and scandium obtained by electrolysis is: 99.35% Al, 0.05% Ti, 0...

Embodiment 3

[0032] Titanium fluoride, zirconium dioxide and alumina are added to an industrial electrolyzer to produce a multi-component microalloyed aluminum alloy with a mass fraction of 0.18% Ti and 0.12% Zr.

[0033] The mass fraction of each component of the electrolyte in the cryolite system is: Molecular ratio (NaF:AlF 3 ) 2.65, sodium fluoride (NaF) 47.0%, aluminum fluoride (AlF 3 )35.5%, calcium fluoride (CaF 2 ) 2.9%, magnesium fluoride (MgF 2 )3.4%, alumina (Al 2 o 3 )5.5%, titanium fluoride (TiF 4 )0.32%, zirconia (ZrO 2 )0.30%, the balance is unavoidable impurities;

[0034] The electrolysis process parameters are: electrolysis temperature 969°C, electrolytic cell working voltage 4.82V, aluminum liquid height 15cm, electrolyte height 16cm, electrode distance 4.7cm;

[0035] The target mass fraction of each (component) element in the multi-element microalloyed aluminum alloy containing titanium, zirconium and scandium obtained by electrolysis is: 99.40% Al, 0.18% Ti, 0....

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Abstract

This invention provides a making method for the multicomponent microalloy aluminium alloy such as titanium, zirconium, the scandium, the main steps as follows: under the steadiness of the electrolyzation aluminium production establishment condition, adding the titanium compound, the zirconium dioxide, the scandium trioxide with a certain proportion, using the electrolytic method of the alumina compound and cryolite to produce, the relative mass as follows: Tiíœ0.2úÑú¼Zríœ0.5úÑú¼Scíœ0.5úÑú¼ the rest is aluminium, wherein there are at least two is not 0 in the TiíóZríóSc. This invention decreases the cost for adding the TiíóZríóSc, decreases the oxide lard and hydrogen content in the alloy, thins and strengthens the aluminium.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy manufacturing, and specifically relates to a multi-element microstructure containing titanium, zirconium and scandium produced by molten salt electrolytic eutectic method using a mixture of alumina, titanium compound, zirconium dioxide and scandium trioxide as raw material. A method of manufacturing an alloyed aluminum alloy. Background technique [0002] Ultra-high-strength aluminum alloy has high strength and toughness, and is a lightweight and high-strength structural material with great application prospects in the aerospace field. Titanium, zirconium, scandium and other alloying elements are usually added to ultra-high-strength aluminum alloys for composite microalloying to improve its various properties. Titanium forms many intermetallic compounds TiAl in aluminum alloys 3 Particles provide a large number of heterogeneous nucleation bases to promote the nucleation of a-Al, thereby r...

Claims

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Application Information

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IPC IPC(8): C25C3/36
Inventor 左秀荣崔海超宋天福翁永刚王明星刘忠侠
Owner ZHENGZHOU UNIV
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