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A kind of al-ti-er aluminum alloy grain refining master alloy and preparation method thereof

An al-ti-er, master alloy technology, applied in the field of aluminum master alloys for grain refinement, can solve the problems of "Zr" poisoning, low grain refinement, difficult preparation, etc. The effect of microstructure and low preparation cost

Active Publication Date: 2022-04-12
广西国瑞稀钪新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, these aluminum alloy grain refiners have some disadvantages: the preparation of Al-Ti-C alloy is difficult, the cost is high, and the grain refinement is lower than that of Al-Ti-B series alloys; Although the preparation cost of -B series alloys is low and the refinement effect is good, it will produce "Zr" poisoning phenomenon, so it is difficult to apply in Zr-containing aluminum alloy materials
The sheet thickness of the obtained alloy is 200-250nm, but its Ti content is as high as more than 48%, and the cost is relatively high

Method used

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  • A kind of al-ti-er aluminum alloy grain refining master alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] An Al-Ti-Er aluminum alloy grain refinement master alloy, its composition and weight percentage are: Ti 5.2%, Er 1.1%, Fe 0.05%, Si 0.04%, and the balance is aluminum.

[0035] Its preparation method comprises the following steps:

[0036] (1) Preparation of Al-Er5 master alloy:

[0037] Preparation of aluminum-erbium master alloy: wrap the metal erbium with aluminum foil according to the ratio of raw materials and press it into the aluminum melt. The content is about 5%.

[0038] (2) Preparation of Al-Ti-Er master alloy:

[0039] ①Put the aluminum ingot into the melting furnace, raise the temperature of the aluminum ingot to 1100°C and keep it warm;

[0040] ②When the charge in ① is completely melted, add titanium sponge to the obtained melt, and set the melting temperature to 1100°C;

[0041] ③When the charge in ② is completely melted, add aluminum-erbium master alloy to the obtained melt, set the melting temperature to 1100°C, and keep stirring the melt for 0.5h;...

Embodiment 2

[0045] An Al-Ti-Er aluminum alloy grain refinement master alloy, its composition and weight percentage are: Ti 6.1%, Er 2.0%, Fe 0.03%, Si 0.02%, and the balance is aluminum.

[0046] Its preparation method comprises the following steps:

[0047] (1) Preparation of Al-Er5 master alloy:

[0048] Preparation of aluminum-erbium master alloy: wrap the metal erbium with aluminum foil according to the ratio of raw materials and press it into the aluminum melt. The content is about 5%.

[0049] (2) Preparation of Al-Ti-Er master alloy:

[0050] ①Put the aluminum ingot into the melting furnace, raise the temperature of the aluminum ingot to 1150°C and keep it warm;

[0051] ②When the charge in ① is completely melted, add titanium sponge to the obtained melt, and set the melting temperature to 1150°C;

[0052] ③When the charge in ② is completely melted, add aluminum-erbium master alloy to the obtained melt, set the melting temperature to 1150°C, and keep stirring the melt for 1 hour;...

Embodiment 3

[0056] An Al-Ti-Er aluminum alloy grain refinement master alloy, its composition and weight percentage are: Ti 4.5%, Er 2.5%, Fe 0.03%, Si 0.02%, and the balance is aluminum.

[0057] Its preparation method comprises the following steps:

[0058] (1) Preparation of Al-Er5 master alloy:

[0059] Preparation of aluminum-erbium master alloy: wrap metal erbium with aluminum foil according to the ratio of raw materials and press it into aluminum melt. The content is about 5%.

[0060] (2) Preparation of Al-Ti-Er master alloy:

[0061] ①Put the aluminum ingot into the melting furnace, raise the temperature of the aluminum ingot to 850°C and keep it warm;

[0062] ②When the charge in ① is completely melted, add titanium sponge to the obtained melt, and set the melting temperature to 850°C;

[0063] ③When the charge in ② is completely melted, add aluminum-erbium master alloy to the obtained melt, set the melting temperature to 850°C, and keep stirring the melt for 0.8h;

[0064] ...

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Abstract

The invention provides an Al-Ti-Er aluminum alloy grain refinement master alloy and a preparation method thereof, belonging to the technical field of aluminum master alloys for grain refinement; the chemical composition of the alloy is calculated by mass percentage: Ti 2.0% ~10.0%, Er: 0.5%~5.5%, (Fe+Si)≤0.1%, and the balance is aluminum. The preparation method is as follows: first, put the aluminum ingot into the medium-frequency induction melting furnace, and gradually raise the temperature to 850 ° C ~ 1250 ° C; second, add sponge titanium into the melting furnace according to the chemical composition ratio; Al-Er intermediate alloy is added in the distribution ratio; finally, the slag is removed and cast into block ingots or made into wire rods with a diameter of 8 to 12 mm by continuous casting and drawing. The invention improves the refinement effect of the master alloy and avoids the "poisoning" phenomenon of Zr by adding the rare earth element Er and rationally optimizing the composition.

Description

technical field [0001] The invention relates to the technical field of an aluminum master alloy for grain refinement, in particular to an Al-Ti-Er aluminum alloy grain refiner master alloy and a preparation method thereof. Background technique [0002] Aluminum alloy grain refiner is an additive widely used in the casting of aluminum alloy materials. Its main function is to refine the grain size of aluminum alloy as cast, mainly including Al-Ti-B, Al-Ti-C, etc. , is widely used because of its simple operation and controllable cost. However, at present, these aluminum alloy grain refiners have some disadvantages: the preparation of Al-Ti-C alloy is difficult, the cost is high, and the grain refinement is lower than that of Al-Ti-B series alloys; Although the preparation cost of -B series alloys is low and the refinement effect is good, it will produce "Zr" poisoning phenomenon, so it is difficult to apply in Zr-containing aluminum alloy materials. [0003] With the advancem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/03C22C1/06
CPCC22C21/003C22C21/00C22C1/03C22C1/026C22C1/06
Inventor 胡振光甘培原冀军宇韦德仕何俞松卢继明
Owner 广西国瑞稀钪新材料科技有限公司