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Zinc-aluminum-yttrium master alloy refining agent and its preparation method and application

A master alloy and refiner technology, which is applied in the field of alloy materials, can solve the problems such as the decline of refinement effect and the "poisoning" of master alloy refinement

Inactive Publication Date: 2018-09-25
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These elements may interfere with the added master alloy and produce adverse effects, resulting in a decrease in the refining effect (that is, the "poisoning" phenomenon of refinement). In the case of aluminum alloy, the reaction of Zr and B will lead to the problem of “poisoning” in the refinement of the master alloy

Method used

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  • Zinc-aluminum-yttrium master alloy refining agent and its preparation method and application
  • Zinc-aluminum-yttrium master alloy refining agent and its preparation method and application
  • Zinc-aluminum-yttrium master alloy refining agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A zinc-aluminum-yttrium master alloy refining agent Zn-45Al-5Y (the mass percentage of Al in the alloy is 45%, the mass percentage of Y is 5%, and the rest is Zn), the preparation process is as follows. The purity of the pure zinc used in the preparation process is 99.9% or above, the purity of pure aluminum is 99.7% or above, and the purity of pure yttrium is 99.9% or above. Dispersion efficiency and dispersion effect in the body. The following examples and comparative examples all select the above-mentioned raw materials.

[0025] (1) According to the chemical composition and quality of the Zn-45Al-5Y master alloy to be prepared, three raw materials of pure aluminum, pure zinc and pure yttrium were weighed respectively.

[0026] (2) Put the two raw materials of pure zinc and pure aluminum into a melting furnace to melt to 700-760° C., stir and mix thoroughly to obtain a zinc-aluminum alloy melt.

[0027] (3) Using a bell jar to press pure yttrium into the zinc-alumi...

Embodiment 2

[0031] A zinc-aluminum-yttrium master alloy refining agent Zn-28Al-7Y, the preparation process is as follows.

[0032] (1) According to the chemical composition and quality of the Zn-28Al-7Y master alloy to be prepared, three raw materials of pure aluminum, pure zinc and pure yttrium were weighed respectively.

[0033] (2) Put the two raw materials of pure zinc and pure aluminum into a melting furnace to melt to 700-760° C., stir and mix thoroughly to obtain a zinc-aluminum alloy melt.

[0034] (3) Pressing pure yttrium into the zinc-aluminum alloy melt below the liquid surface with a bell jar, reacting for 15 minutes, then stirring the alloy melt for 30 minutes to obtain a zinc-aluminum-yttrium alloy melt.

[0035] (4) Pouring the zinc-aluminum-yttrium alloy melt into a mold, and obtaining a zinc-aluminum-yttrium master alloy refiner after solidification.

[0036]Analyze the Zn-28Al-7Y master alloy refiner by scanning electron microscope energy spectrometer (EDX) and find th...

Embodiment 3

[0038] A zinc-aluminum-yttrium master alloy refining agent Zn-12Al-2Y, the preparation process is as follows.

[0039] (1) According to the chemical composition and quality of the Zn-12Al-2Y master alloy to be prepared, three raw materials of pure aluminum, pure zinc and pure yttrium were weighed respectively.

[0040] (2) Put the two raw materials of pure zinc and pure aluminum into a melting furnace to melt to 700-760° C., stir and mix thoroughly to obtain a zinc-aluminum alloy melt.

[0041] (3) Press pure yttrium into the zinc-aluminum alloy melt below the liquid surface with a bell jar, react for 5 minutes, and stir the alloy melt for 10 minutes to obtain a zinc-aluminum-yttrium alloy melt.

[0042] (4) Pouring the zinc-aluminum-yttrium alloy melt into a mold, and obtaining a zinc-aluminum-yttrium master alloy refiner after solidification.

[0043] Analysis of the Zn-12Al-2Y master alloy refiner by scanning electron microscope energy spectrometer (EDX) found that, simila...

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Abstract

The invention discloses a zinc-aluminum-yttrium master alloy refiner. The zinc-aluminum-yttrium master alloy refiner is characterized by comprising the following components: 2-7% of Y, 12-45% of Al and the balance of Zn, wherein the element Y is embedded in the zinc-aluminum alloy matrix in the form of YZnb-aAla or YAl3-cZnc compound particles, a is larger than 0 and smaller than 5, b equals to 8.5, 10 or 12 and c is larger than 0 and smaller than 1. The invention further discloses a preparation method and application of the zinc-aluminum-yttrium master alloy refiner. According to the zinc-aluminum-yttrium master alloy refiner and the preparation method as well as application thereof, the zinc-aluminum-yttrium master alloy refiner prepared by adopting the preparation method can be added into hypoeutectic zinc-aluminum alloy, so that fine-sized and unramified spherical or polyhedral primary Eta-Zn equiaxed grains can be obtained, and an advantageous effect on the microstructure optimization, casting technique property and use performance of the zinc-aluminum alloy is realized.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and relates to a zinc-aluminum-yttrium master alloy refiner and its preparation method and application. The prepared zinc-aluminum-yttrium master alloy refiner can be used to refine hypoeutectic zinc-aluminum Primary η-Zn grains in the alloy. Background technique [0002] Hypoeutectic zinc-aluminum alloys with an aluminum content of less than 5wt.% are widely used because of their good fluidity, strong mold filling ability, good mechanical processing performance and certain mechanical properties. However, during the solidification process, the primary η-Zn grains tend to generate large-sized and complexly branched dendrites, which can easily lead to structural defects such as composition segregation, shrinkage porosity, and shrinkage cavities, resulting in problems such as mechanical and corrosion resistance degradation. This problem is often solved by grain refinement in production. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C18/04C22C1/03C22C30/06C22C1/02
CPCC22C1/02C22C1/03C22C18/04C22C30/06
Inventor 王振卿孙群翔赵德刚左敏
Owner UNIV OF JINAN
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