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Low-cooling-rate sensitive high-nucleation-capacity AlNbTiBRE composite refining modifier used for aluminum alloy and preparation method of low-cooling-rate sensitive high-nucleation-capacity AlNbTiBRE composite refining modifier used for aluminum alloy

A technology for refining modifiers and aluminum alloys, applied in the field of composite refining modifiers, which can solve the problems of sensitive cooling rate, unfavorable improvement of comprehensive performance of alloy parts, and differences in refining effect, etc., and achieves easy operation and control, cooling speed Low Sensitivity, Small Variation Effect

Active Publication Date: 2016-05-11
北京航大新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned existing refinement modifiers are sensitive to the cooling rate, and have different refinement effects at different cooling rates, which makes it difficult to use thin-walled components when they are applied to casting parts with different wall thicknesses and complex shapes. (with a relatively high cooling rate) and thick wall (with a relatively low cooling rate) have different refining effects, which is not conducive to the improvement of the overall performance of alloy parts

Method used

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  • Low-cooling-rate sensitive high-nucleation-capacity AlNbTiBRE composite refining modifier used for aluminum alloy and preparation method of low-cooling-rate sensitive high-nucleation-capacity AlNbTiBRE composite refining modifier used for aluminum alloy
  • Low-cooling-rate sensitive high-nucleation-capacity AlNbTiBRE composite refining modifier used for aluminum alloy and preparation method of low-cooling-rate sensitive high-nucleation-capacity AlNbTiBRE composite refining modifier used for aluminum alloy
  • Low-cooling-rate sensitive high-nucleation-capacity AlNbTiBRE composite refining modifier used for aluminum alloy and preparation method of low-cooling-rate sensitive high-nucleation-capacity AlNbTiBRE composite refining modifier used for aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Al-4Nb-3Ti-B-0.5La-0.5Ce composite refinement modificator and preparation method thereof

[0075] Target ingredients for compound refinement modifier:

[0076] The target composition of the composite refinement modifier is Al-4Nb-3Ti-B-0.5La-0.5Ce;

[0077] Dosage: 4Kg of Al-10Nb, 0.3Kg of sponge titanium (Ti) with a purity of 99.7%, and 0.1Kg of 99.5% purity are required to prepare 10Kg of Al-4Nb-3Ti-B-0.5La-0.5Ce composite refinement modifier Boron (B) powder, 0.05Kg of metal lanthanum (La) with a purity of 99.0wt%, 0.05Kg of metal cerium (Ce) with a purity of 99.0wt%, and the remaining Al blocks with a size of 5×5cm.

[0078] Ingot mold step;

[0079] Put the graphite ingot mold into the resistance furnace and heat it up to 500°C, keep it warm for 2 hours, then put the fully preheated ingot mold into the induction furnace, and install a sprue cup on the ingot mold, and add magnesium oxide to the sprue cup Ceramic filter, ready to pour. The sprue cup installed wit...

Embodiment 2

[0098] Preparation of Al-5Nb-3Ti-0.5B-0.5La-0.5Er Composite Refining Modifier

[0099] Target ingredients for compound refinement modifier:

[0100] The target composition of the compound refinement modifier is Al-5Nb-3Ti-0.5B-0.5La-0.5Er;

[0101]Dosage: 5Kg of Al-10Nb, 0.3Kg of sponge titanium (Ti) with a purity of 99.7%, and 1Kg of 99.5% purity are required to prepare 10Kg of Al-5Nb-3Ti-0.5B-0.5La-0.5Er composite refinement modifier Al-5B intermediate alloy block, 0.05Kg of lanthanum (La) with a purity of 99.0wt%, 0.05Kg of erbium (Er) with a purity of 99.0wt%, and the remaining Al block with a size of 5×5cm . The size of the Al-5B intermediate alloy block is 3×3 cm.

[0102] Ingot mold step;

[0103] Put the graphite ingot mold into the resistance furnace and heat it up to 400°C, keep it warm for 2 hours, then put the fully preheated ingot mold into the induction furnace, and install a sprue cup on the ingot mold, and add magnesium oxide to the sprue cup Ceramic filte...

Embodiment 3

[0122] Al-3Nb-2Ti-0.8B-0.5La-0.5Ce Composite Refining Modifier

[0123] Target ingredients for compound refinement modifier:

[0124] The target composition of the composite refinement modifier is Al-3Nb-2Ti-0.8B-0.5La-0.5Ce;

[0125] Dosage: 3Kg of Al-10Nb, 0.2Kg of sponge titanium (Ti) with a purity of 99.7% and 0.08Kg of a purity of 99.5% are required to prepare 10Kg of Al-3Nb-2Ti-0.8B-0.5La-0.5Ce composite refinement modifier. % of boron (B) powder, 0.05Kg of yttrium (Y) with a purity of 99.0wt%, 0.05Kg of cerium (Ce) with a purity of 99.0wt%, and the rest of the Al block with a size of 5×5cm .

[0126] Ingot mold step;

[0127] Put the graphite ingot mold into the resistance furnace and heat it up to 300°C, keep it warm for 3 hours, then put the fully preheated ingot mold into the induction furnace, and install a sprue cup on the ingot mold, and install magnesium oxide on the sprue cup Ceramic filter, ready to pour. The sprue cup installed with the magnesia ceramic f...

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Abstract

The invention discloses a low-cooling-rate sensitive high-nucleation-capacity AlNbTiBRE composite refining modifier used for aluminum alloy and a preparation method of the low-cooling-rate sensitive high-nucleation-capacity AlNbTiBRE composite refining modifier used for aluminum alloy. The low-cooling-rate sensitive high-nucleation-capacity AlNbTiBRE composite refining modifier is prepared from Al-xNb-yTi-zB-kRE, wherein 0.01<x<=6wt%, 0.01<y<=6wt%, 0.01<z<=1wt%, 0.01<k<=1wt%, and the balance is Al; and RE is one of La, Ce, Nd, Er, Gd, Y, Yb and Sc or a mixture of two or more of La, Ce, Nd, Er, Gd, Y, Yb and Sc. A preparation technology is simple, and the compositions can be precisely controlled. The composite refining modifier is used for processing aluminum alloy, and the refining effect and the modifying effect are excellent; for all parts of castings complex in shape and different in thickness, namely, all parts with different cooling rates, the cooling rate sensitivity of the refining effect is low; and the mechanical performance of the obtained alloy is remarkably improved, and the performance difference between the parts with different cooling rates is remarkably reduced.

Description

technical field [0001] The invention relates to a composite refinement modifier for aluminum alloys, more particularly to a low cooling rate sensitive high nucleation ability Al-Nb-Ti-B-RE composite refinement modifier for aluminum alloys. Background technique [0002] Aluminum alloys are widely used in industry due to their good mechanical properties and excellent casting properties. In recent years, the requirement of lightweight has put forward higher and higher requirements for the comprehensive performance of aluminum alloy castings. However, the coarseness of grains directly affects the overall performance of aluminum alloy castings, and the key to obtain excellent performance is to produce fine and uniform equiaxed grain structures. The most common and effective refinement method is to add grain refiners to the alloy. At present, people generally use Al-Ti, Al-Ti-C or Al-Ti-B intermediate alloys as grain refiners for aluminum alloys, among which Al-Ti-B refiners hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C1/06C22C21/00
CPCC22C1/026C22C1/03C22C1/06C22C21/00
Inventor 张花蕊张虎
Owner 北京航大新材科技有限公司
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