Al-Ti-Zn intermediate alloy and preparation method thereof

An al-ta-zn, master alloy technology, applied in the field of metal alloy materials, to achieve the effect of small refinement, uniform distribution, and avoiding fluctuations in the content of zinc elements

Inactive Publication Date: 2015-12-09
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Such a large TiAl3 particle size will greatly reduce the number of particles that can serve as nucleation substrates, which will inevitably lead to a greatly reduced grain refinement efficiency; large-sized TiAl3 sub> particles easily lead to uneven dispersion of titanium in the aluminum matrix, resulting in uneven grain structure of the aluminum alloy after refinement; in addition, because TiAl3 is brittle, the remaining Large-sized massive or long strips of TiAl3 particles are easy to break and break under stress, and the microscopic cracks generated will expand in the alloy matrix under the action of stress concentration, resulting in a decrease in the mechanical properties of the alloy

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Al-15Ta-2Zn master alloy, its chemical composition is composed of the following components by mass percentage: Ta15%, Zn2%, and the rest is Al. Ta element is mainly polyhedral or spherical TaAl 3-x Zn x (03-x Zn x ( image 3 For its energy spectrum) the gray phase is the aluminum matrix.

[0037] The above Al-15Ta-2Zn master alloy has a significant grain refinement effect on industrial pure aluminum: the average grain diameter of industrial pure aluminum (purity 99.7wt.%) without any refiner is about 4mm ( Figure 4 ), the average grain diameter of industrial pure aluminum after adding the above-mentioned Al-15Ta-2Zn master alloy with an atomic ratio of 0.02% of tantalum element is about 0.4mm, and the grain size is uniform ( Figure 5 ). After adding the Al-10Ti master alloy with a Ti atomic ratio of 0.02%, the grain size of industrial pure aluminum is not uniform, and the diameter of the largest grain can reach about 0.9mm ( Image 6 ). Compared Figure 5 and ...

Embodiment 2

[0044] Al-8Ta-8Zn master alloy, its chemical composition is composed of the following components by mass percentage: Ta8%, Zn2%, and the rest is Al. This master alloy is compared with the master alloy prepared in Example 1, except TaAl 3-x Zn x (0

[0045] The process of preparing 2000 grams of the above-mentioned Al-8Ta-8Zn master alloy is as follows:

[0046] (1) Weigh 1720 grams of raw material pure aluminum, 160 grams of pure zinc and K 2 TaF 7 347 grams;

[0047] (2) Melting pure aluminum and pure zinc to the range of 690-730°C in a melting furnace to obtain an aluminum melt;

[0048] (3) The above K ２ TaF 7 Add to the above-mentioned aluminum melt in 3 batches for reaction, and add the next batch after each ba...

Embodiment 3

[0051] Al-6Ta-5Zn master alloy, its chemical composition is composed of the following components by mass percentage: Ta6%, Zn5%, and the rest is Al. This master alloy is compared with the master alloy prepared in Example 1, except TaAl 3-x Zn x (0

[0052] The process of preparing 1000 grams of the above-mentioned Al-6Ta-5Zn master alloy is as follows:

[0053] (1) Weigh 905 grams of raw material pure aluminum, 50 grams of pure zinc and K 2 TaF 7 130.2 grams;

[0054] (2) Melting pure aluminum and pure zinc in the melting furnace to the range of 680-730°C to obtain zinc-containing aluminum melt;

[0055] (3) The above K ２ TaF 7 Add to the above-mentioned pure aluminum melt in 2 batches for reaction, each batch react...

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Abstract

The invention provides Al-Ti-Zn intermediate alloy. The Al-Ti-Zn intermediate alloy is composed of, by mass, 0.6%-20% of Ta, 0.5%-9% of Zn, and the balance Al. Meanwhile, the invention provides the preparation method of the Al-Ti-Zn intermediate alloy. According to the Al-Ti-Zn intermediate alloy prepared with the preparation method, TaAl3-xZnx particles are small in size through refining, and distributed in a substrate evenly; the Ta element is distributed evenly after the TaAl3-xZnx particles are added to aluminum or aluminum alloy to be refined, so that the various problems possibly caused by the large size of the particles are avoided.

Description

technical field [0001] The invention relates to an aluminum-based master alloy refiner for refining α-Al grains in aluminum or aluminum alloys and a preparation method thereof, in particular to an Al-Ta-Zn master alloy and a preparation method thereof, belonging to metal Alloy material technology field. Background technique [0002] In order to improve and improve the surface quality, microstructure, forming process performance, corrosion resistance and mechanical properties of the material, some cast or deformed aluminum alloys need to add a small amount of master alloy to the melt to refine the microstructure. Al-Ti master alloy is a commonly used grain refiner for aluminum alloys, in which the Ti element is mainly TiAl 3 Compound particles exist in the form of compound particles. In the process of grain refinement, after the Al-Ti master alloy is added to the aluminum alloy melt to be treated, TiAl 3 The compounds are released into the aluminum melt as solid particles ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C21/00C22C1/02
Inventor 王振卿赵德刚左敏杨中喜
Owner UNIV OF JINAN
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