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Al-Ti-C intermediate alloy and preparation method thereof

A master alloy, al-ti-c technology, which is applied in the field of preparation of aluminum-based master alloys, can solve the problems of low purity, prone to agglomeration, and coarse TiC particle size, and achieves good metamorphic effect, meets demand, and moderate size. Effect

Active Publication Date: 2017-03-08
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the preparation process of Al-Ti-C master alloy, there are often problems such as poor wettability between carbon source and aluminum melt, coarse TiC particle size and easy agglomeration, high alloy slag content, and low purity, which limit the Industrial Development and Application of High Quality Al-Ti-C Master Alloy

Method used

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  • Al-Ti-C intermediate alloy and preparation method thereof
  • Al-Ti-C intermediate alloy and preparation method thereof
  • Al-Ti-C intermediate alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation process of the Al-Ti-C master alloy of this embodiment is as follows:

[0029] Put 2 kg of pure aluminum into a crucible and melt it in an intermediate frequency induction furnace; heat up to 1150-1250°C, mix 100 grams of potassium fluorotitanate and 6 grams of carbon nanotubes evenly and cover the surface of the aluminum melt, at 1150-1250°C Keep warm at 1250°C for 20-30 minutes, pour out the surface fluoride salt, stir the alloy melt, and pour it into a metal mold to form an Al-1.0%Ti-0.3%C master alloy ingot.

[0030] The composition of the prepared Al-Ti-C master alloy is Al-1.0%Ti-0.3%C (mass fraction), and its microstructure is as follows figure 2 As shown, it can be seen from the figure that TiC particles are dispersedly distributed in the Al-Ti-C master alloy, the TiC particle size is 50nm-2μm, and the TiC particle shape is spherical and / or nearly spherical.

[0031] Figure 5 (c) shows the refinement effect of the master alloy on industrial p...

Embodiment 2

[0033] The preparation process of the Al-Ti-C master alloy of this embodiment is as follows:

[0034] Put 2 kg of pure aluminum into a crucible and melt it in an intermediate frequency induction furnace; heat up to 1150-1250°C, mix 140 grams of potassium fluotitanate and 8 grams of carbon nanotubes evenly and cover the surface of the aluminum melt, Keep warm at 1250°C for 20-30 minutes, pour out the surface fluoride salt, stir the alloy melt, and pour it into a metal mold to form an Al-1.4%Ti-0.4%C master alloy ingot.

[0035] The composition of the prepared Al-Ti-C master alloy is Al-1.4%Ti-0.4%C (mass fraction), and its microstructure is as follows image 3 As shown, it can be seen from the figure that TiC particles are dispersedly distributed in the Al-Ti-C master alloy, the TiC particle size is 60nm-2.5μm, and the TiC particle shape is spherical and / or nearly spherical.

[0036] Figure 5 (d) shows the refinement effect of the master alloy on industrial pure aluminum, co...

Embodiment 3

[0038] The preparation process of the Al-Ti-C master alloy of this embodiment is as follows:

[0039] Put 2 kg of pure aluminum into a crucible and melt it in an intermediate frequency induction furnace; heat up to 1150-1250 ° C, mix 420 grams of potassium fluorotitanate and 24 grams of carbon nanotubes evenly and cover the surface of the aluminum melt. Keep warm at 1250°C for 20-30 minutes, pour out the fluoride salt on the surface, stir the alloy melt, and pour it into a metal mold to form an Al-4.2%Ti-1.2%C master alloy ingot.

[0040] The composition of the prepared Al-Ti-C master alloy is Al-4.2%Ti-1.2%C (mass fraction), and its microstructure is as follows Figure 4 It can be seen from the figure that the TiC particles are dispersedly distributed in the Al-Ti-C master alloy, the TiC particle size is 60nm-3μm, and the TiC particle shape is spherical and / or nearly spherical.

[0041] Figure 5 (e) shows the refinement effect of the master alloy on industrial pure aluminu...

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Abstract

The invention discloses an Al-Ti-C intermediate alloy and a preparation method thereof, and belongs to the technical field of aluminum based intermediate alloy preparation. According to the preparation method, carbon nanotubes are taken as a carbon source and reacts with aluminum melts; the solubility of carbon in Al melts is increased, the nucleation rate of TiC particles in melts is increased, the dispersion degree of TiC particles in the matrix is improved, and a high quality Al-Ti-C intermediate alloy is obtained. The prepared Al-Ti-C intermediate alloy has an excellent grain refining effect on industrial pure aluminum, and the industrial application prospect is good.

Description

technical field [0001] The invention belongs to the technical field of preparation of aluminum-based master alloys, in particular to an Al-Ti-C master alloy and a preparation method thereof. Background technique [0002] A1-Ti-C master alloy is an efficient grain refiner for aluminum and its alloys, which is extremely important for improving the quality and performance of aluminum alloys. With the continuous development of industrial technology, the requirements for the quality and modification performance of Al-Ti-C master alloy are increasing day by day. However, in the preparation process of Al-Ti-C master alloy, there are often problems such as poor wettability between carbon source and aluminum melt, coarse TiC particle size and easy agglomeration, high alloy slag content, and low purity, which limit the Industrial development and application of high-quality Al-Ti-C master alloy. It is of great significance to develop the production technology of Al-Ti-C master alloy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C1/02C22C21/00
Inventor 江鸿翔赵九洲孙倩何杰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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