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(ScAl3+Al2O3+Sc2O3)/Al-based compound inoculant, preparation method thereof and application

A composite inoculant, S21 technology, applied in the field of aluminum alloy smelting, can solve the problems of low production efficiency and complicated preparation process of inoculants for aluminum alloys, and achieve high production efficiency, easy industrial application, and fine particle size

Active Publication Date: 2020-06-16
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a kind of (ScAl 3 +Al 2 o 3 +Sc 2 o 3 ) / Al-based composite inoculant, its preparation method and application, to solve the problems of complex preparation process and low production efficiency of inoculants for aluminum alloys in the prior art

Method used

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  • (ScAl3+Al2O3+Sc2O3)/Al-based compound inoculant, preparation method thereof and application
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preparation example Construction

[0021] In a typical embodiment of the present application, a kind of (ScAl 3 +Al 2 o 3 +Sc 2 o 3 ) / Al-based composite inoculant preparation method, the preparation method comprising: step S1, scandium trioxide powder and pure aluminum are cast into ingots to obtain aluminum scandium oxide master alloy ingots; step S2, aluminum scandium oxide master alloy The ingot was subjected to rapid solidification treatment to obtain (ScAl 3 +Al 2 o 3 +Sc 2 o 3 ) / Al-based composite inoculant.

[0022] Using scandium trioxide powder and pure aluminum as raw materials through ingot casting and rapid solidification to form 3 、Al 2 o 3 、Sc 2 o 3 The reinforcement phase (ScAl 3 +Al 2 o 3 +Sc 2 o 3 ) / Al-based composite inoculant, the effective grain refinement and recrystallization inhibition effect of scandium on aluminum alloy can be significantly reduced (ScAl 3 +Al 2 o 3 +ScO 2 ) / Al composite material inoculant grain size, and the content of scandium element can be regu...

Embodiment 1

[0038] (1) Weigh commercial Sc 2 o 3 0.9388g of powder (100 mesh, 99.5wt.% purity) and 30g of commercially available pure aluminum (99.9wt.% purity) were mixed to form a mixture.

[0039] (2) Put the mixture into the copper crucible of WK-II non-consumable vacuum arc melting furnace for melting, specifically: vacuumize until the vacuum degree in the furnace is 5×10 -3 Pa, and then filled with high-purity argon to keep the pressure in the furnace at 0.5MPa, the whole melting process is carried out under the atmosphere of argon, adjust the current to control the melting temperature at 2200 ° C, and keep it warm for 5 minutes to melt the mixture. Under the same conditions, the smelting was repeated six times to obtain a massive Al-Sc-O master alloy ingot, and the copper crucible was cooled by circulating water during the smelting process.

[0040] (3) Put the bulk Al-Sc-O master alloy ingot into the LZK-12A vacuum quenching furnace for rapid solidification, specifically: put th...

Embodiment 2

[0042] (1) Weigh commercial Sc 2 o 3 0.0.1 g of powder (200 mesh size, 99.9 wt. % purity) and 30 g of commercially available pure aluminum (99.9 wt. % purity) were mixed to form a mixture.

[0043] (2) Put the mixture into the copper crucible of WK-II non-consumable vacuum arc melting furnace for melting, specifically: vacuumize until the vacuum degree in the furnace is 5×10 -3 Pa, and then filled with high-purity argon to keep the pressure in the furnace at 0.5MPa, the whole melting process is carried out under the atmosphere of argon, adjust the current to control the melting temperature at 2000°C, and keep it warm for 8 minutes to melt the mixture. Under the same conditions, the smelting was repeated six times to obtain a massive Al-Sc-O master alloy ingot, and the copper crucible was cooled by circulating water during the smelting process.

[0044] (3) Put the bulk Al-Sc-O master alloy ingot into the LZK-12A vacuum quenching furnace for rapid solidification, specifically...

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Abstract

The invention provides a (ScAl3+Al2O3+Sc2O3) / Al-based compound inoculant, a preparation method thereof and application. The preparation method comprises the following steps: (S1) performing ingot making with scandium oxide powder and pure aluminum to obtain an aluminum-scandium-oxygen master alloy ingot; and (S2) performing rapid solidification treatment on the aluminum-scandium-oxygen master alloy ingot to obtain the (ScAl3+Al2O3+Sc2O3) / Al-based compound inoculant. The preparation method can obtain the (ScAl3+Al2O3+Sc2O3) / Al-based compound inoculant by just two steps, and the preparation technique is simple. The ingot making and the rapid solidification treatment are both common techniques in the field of metallurgy, and the production efficiency is high so as to facilitate the industrialapplication. In the obtained (ScAl3+Al2O3+Sc2O3) / Al-based compound inoculant, reinforced phase particles are fine in size and dispersed in distribution so as to overcome the shortcoming that reinforced phase particles in an existing inoculant is coarse in size and prone to segregation.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy smelting, in particular to a (ScAl 3 +Al 2 o 3 +Sc 2 o 3 ) / Al-based composite inoculant, its preparation method and application. Background technique [0002] It has been proven to be the simplest, most practical, and one of the most effective grain refinement methods to refine the grain structure of aluminum alloy by adding inoculant (grain refiner), which is widely used in industrial production at present. method to refine the grains of as-cast aluminum alloys. The method has the advantages of being simple, practical, economical and efficient, and the amount of the inoculant added is only a few thousandths of that of the aluminum alloy. At present, the most commonly used in industrial production are aluminum titanium boron inoculant (Al-Ti-B inoculant) and aluminum titanium carbon inoculant (Al-Ti-C inoculant). TiAl in AlTiB inoculant 3 Phase, TiB 2 Both phases can be used as het...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C1/03C22C21/00
CPCC22C1/026C22C1/03C22C1/06C22C21/00
Inventor 李诺付国燕王玮玮杜尚超刘召波李晓艳付云枫孙宁磊
Owner CHINA ENFI ENGINEERING CORPORATION
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