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High quality aluminum titanium boron refiner and preparation method thereof

An aluminum-titanium-boron refiner and high-quality technology are applied in the field of aluminum alloy smelting, which can solve the problems of difficult application and increase the preparation cost, and achieve the effects of shortening the residence time, simple operation and low preparation process cost.

Inactive Publication Date: 2016-09-07
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The advantage of the existing invention is that the prepared refiner has a good microstructure and refinement effect, but the disadvantage is that it is not easy to apply to actual production, and adding new alloy elements is simple but will increase the preparation cost

Method used

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  • High quality aluminum titanium boron refiner and preparation method thereof
  • High quality aluminum titanium boron refiner and preparation method thereof
  • High quality aluminum titanium boron refiner and preparation method thereof

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preparation example Construction

[0036] The preparation method of described high-quality aluminum-titanium-boron refiner, the method comprises the steps:

[0037] (1) Raw materials: Potassium fluoroborate, potassium fluorotitanate and pure aluminum;

[0038] (2) Use a high-purity graphite crucible to melt pure aluminum in a resistance furnace and raise the temperature to 800°C;

[0039] (3) Mix potassium fluorotitanate and potassium fluorotitanate evenly, dry them, and add them to the pure aluminum melt twice at a constant speed. +10Al=3TiB2+9KAlF4+K3AlF6 and 3K2TiF6+13Al=3TiAl3+3KAlF4+K3AlF6 are calculated;

[0040] (4) Let the melt stand and stir for 3 to 5 minutes;

[0041] (5) Add calcium fluoride, let it stand for 2 to 5 minutes, remove water slag, and pour into rods.

[0042] In the step (3), it is preferred to determine that the feeding mass ratio of potassium fluoroborate in the two feedings is 0~0.2, that is, the feeding quality of potassium fluoroborate in the second feeding is 83.3% of the total...

Embodiment 1

[0048] (1) According to the generated weight percentage, Ti is 5%, B is 1%, and aluminum is the balance, respectively weigh 66.3g of potassium fluoroborate, 132.5g of potassium fluorotitanate and 552.3g of pure aluminum.

[0049] (2) Divide the weighed potassium fluoroborate into 2 parts according to the mass ratio of the first and second additions as 1:5; divide the weighed potassium fluoroborate into 2 parts; Good potassium fluotitanate is divided into 2 parts.

[0050] (3) Mix the potassium fluoborate and potassium fluotitanate required for each addition evenly, and dry them in a drying oven at 80°C.

[0051] (4) Using a high-purity graphite crucible, melt industrially pure aluminum in a resistance furnace and raise the temperature to 800°C.

[0052] (5) For the first feeding, use the funnel to feed the prepared mixed fluoride salt at a constant speed for 7 minutes, stir with a graphite rod during feeding, and let stand for 15 minutes after feeding.

[0053] (6) Remove wa...

Embodiment 2

[0058] (1) According to the generated weight percentage, Ti is 5%, B is 1%, and aluminum is the balance, respectively weigh 67.81g of potassium fluoroborate, 135.6g of potassium fluorotitanate and 565.1g of pure aluminum.

[0059] (2) Divide the weighed potassium fluoroborate into 2 parts according to the mass ratio of the first and second additions of 0:1; according to the mass ratio of the first and second additions of 1.09:1, weigh Good potassium fluotitanate is divided into 2 parts.

[0060] (3) Mix the potassium fluoborate and potassium fluotitanate required for each addition evenly, and dry them in a drying oven at 80°C.

[0061] (4) Using a high-purity graphite crucible, melt industrially pure aluminum in a resistance furnace and raise the temperature to 800°C.

[0062] (5) For the first feeding, use the funnel to feed the prepared mixed fluoride salt at a constant speed for 7 minutes, stir with a graphite rod during feeding, and let stand for 15 minutes after feeding....

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Abstract

The invention discloses a preparation method of a high quality aluminum titanium boron refiner. The prepared high quality aluminum titanium boron refiner comprises, by mass, 4.8-5.5% of Ti, 0.8-1.2% of B and the balance Al. The preparation method of the intermediate alloy comprises the steps that the quantities of potassium fluoborate and potassium fluotitanate required for two-time feeding are calculated according to a chemical reaction equation; the feeding method is two-time feeding; according to the matching ratio of villiaumite two times of feeding, the mass ratio of the potassium fluotitanate in the first feeding to the potassium fluotitanate in the second feeding is 1.09-1.52 and the mass ratio of the potassium fluoborate in the first feeding to the potassium fluoborate in the second feeding is 0-0.2; but it should be always guaranteed that the mass ratio of the potassium fluoborate to the potassium fluotitanate in the second feeding is 1.05:1; the potassium fluotitanate and the potassium fluoborate which are well proportioned are evenly mixed and dried, and added into a pure aluminum melt at a constant speed in two times; the mixture obtained in the previous step is stored for a period of time and then mixed for 3-5 minutes; and calcium fluoride is added into the mixture, water slag is removed 2-5 minutes later, and sticks are formed by pouring.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy smelting, and in particular relates to a high-quality aluminum-titanium-boron refining agent and a preparation method thereof. Background technique [0002] Because aluminum has good fatigue resistance, formability, corrosion resistance and good electrical conductivity, aluminum alloy products are widely used in industrial fields such as automobile manufacturing, aerospace materials, packaging materials, building materials, etc. However, if you want to obtain Aluminum alloy products with relatively good comprehensive performance are more practical methods for grain refinement of aluminum alloy materials. The main grain refinement methods are: kinetic method and external nucleation method. The dynamic method is to use different vibration methods to continuously fuse the molten metal during the solidification process, and these small fusing fragments act as nucleation cores, which can also a...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/02C22C1/06C22C32/00
CPCC22C21/00C22C1/026C22C1/06C22C32/0073
Inventor 李润霞于宝义张文华郑黎聂赛男任国庆林亚冬
Owner SHENYANG POLYTECHNIC UNIV
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