CN-121992231-A - Aluminum alloy refiner, and preparation method and application thereof

Abstract

The invention provides an aluminum alloy refiner, a preparation method and application thereof, and relates to the technical field of aluminum alloy, and the preparation method of the aluminum-titanium-boron-rare earth composite refiner comprises the following steps: melting and uniformly stirring aluminum, an Al-Ti intermediate alloy, an Al-rare earth intermediate alloy and an Al-B intermediate alloy to obtain an aluminum alloy melt, degassing the aluminum alloy melt, skimming, and heating to obtain an aluminum alloy liquid, and casting, annealing and cooling the aluminum alloy liquid to obtain the aluminum-titanium-boron-rare earth composite refiner. The aluminum-titanium-boron-rare earth composite refiner can reduce the average grain size of the aluminum alloy.

Inventors

• TANG KAIJIAN
• FAN XIANGYONG
• LI FEIQING
• WANG CHAO
• HUANG ZONGFU

Assignees

• 安徽鑫铂光伏材料有限公司

Dates

Publication Date

20260508

Application Date

20251231

Claims (9)

1. 1. The preparation method of the aluminum-titanium-boron-rare earth composite refiner is characterized by comprising the following steps of carrying out melting treatment on aluminum, al-Ti intermediate alloy, al-rare earth intermediate alloy and Al-B intermediate alloy, uniformly stirring to obtain an aluminum alloy melt, carrying out degassing treatment on the aluminum alloy melt, removing slag, heating to obtain an aluminum alloy liquid, and carrying out casting, annealing and cooling on the aluminum alloy liquid to obtain the aluminum-titanium-boron-rare earth composite refiner.
2. 2. The method for preparing the aluminum-titanium-boron-rare earth composite refiner according to claim 1, wherein the Al-rare earth intermediate alloy is selected from the group consisting of Al-La intermediate alloy, al-Ce intermediate alloy and Al-Y intermediate alloy.
3. 3. The method for preparing aluminum-titanium-boron-rare earth composite refiner according to claim 1, wherein the melting treatment temperature is 800 ℃ to 850 ℃.
4. 4. The method of preparing an aluminum-titanium-boron-rare earth composite refiner of claim 1, wherein the annealing process comprises treating at 550-570 ℃ for 5-7 hours.
5. 5. An aluminum-titanium-boron-rare earth composite refiner, which is prepared by the preparation method of any one of claims 1-4.
6. 6. The aluminum-titanium-boron-rare earth composite refiner as set forth in claim 5, wherein the aluminum-titanium-boron-rare earth composite refiner comprises, by mass, 5% -6% of Ti, 1% -1.5% of B, 0.5% -1% of rare earth elements and the balance of Al.
7. 7. The aluminum-titanium-boron-rare earth composite refiner as set forth in claim 5, wherein the aluminum-titanium-boron-rare earth composite refiner comprises, by mass, 5% of Ti, 1% of B, 0.5% of rare earth elements, and the balance of Al.
8. 8. Use of an aluminium-titanium-boron-rare earth composite refiner according to any one of claims 5-7 for the preparation of an aluminium alloy, wherein the aluminium alloy comprises at least one of Zr, cr.
9. 9. The use according to claim 8, wherein the amount of the aluminum-titanium-boron-rare earth composite refiner is 0.1 to 0.3% of the mass of aluminum in the aluminum alloy.

Description

Aluminum alloy refiner, and preparation method and application thereof Technical Field The invention relates to the technical field of aluminum alloy, in particular to an aluminum alloy refiner, a preparation method and application thereof. Background The aluminum alloy is a metal material with excellent performance, which is obtained by taking aluminum as a matrix, adding one or more alloy elements such as copper, silicon, magnesium, zinc, manganese and the like, and performing heat treatment. The density is about 2.7g/cm 3, and the strength/weight ratio is very high after alloying and heat treatment, so that the alloy is an important raw material in the transportation, construction, electric power and packaging industries. According to the classical hall-petty relationship, the strength of a metallic material is inversely proportional to the square root of the grain size, and therefore the finer the grain, the higher the material strength, hardness. The aluminum alloy refiner is an additive for refining grains and improving microstructure and mechanical properties of aluminum alloy. The addition of the refiner greatly increases the nucleation rate in the solidification process, and changes the original coarse grains into fine equiaxed grains, thereby increasing the strength of the aluminum alloy. The aluminum titanium boron refiner is the most widely used grain refiner in the aluminum alloy industry at present. TiB 2 crystal structure of the aluminum titanium boron refiner is highly matched with aluminum, and interface energy is low, so TiB 2 can efficiently promote alpha-Al nucleation. However, when Zr and Cr exist in the melt, zr and Cr elements are adsorbed on the surfaces of TiB 2 particles and react with TiB 2 to generate a solid solution coating. Therefore, when the alloy contains zirconium and chromium elements, the effect of the aluminum titanium boron refiner is seriously weakened. Disclosure of Invention Aiming at the defects of the prior art, the invention provides an aluminum alloy refiner, a preparation method and application thereof, and solves the technical problem that the effect of the aluminum titanium boron refiner is influenced by zirconium and chromium elements. In order to achieve the above purpose, the invention is realized by the following technical scheme: In a first aspect, the invention provides a preparation method of an aluminum-titanium-boron-rare earth composite refiner, which comprises the following steps of carrying out melting treatment on aluminum, al-Ti intermediate alloy, al-rare earth intermediate alloy and Al-B intermediate alloy, uniformly stirring to obtain an aluminum alloy melt, carrying out degassing treatment on the aluminum alloy melt, removing slag, heating to obtain an aluminum alloy liquid, and carrying out casting, annealing and cooling on the aluminum alloy liquid to obtain the aluminum-titanium-boron-rare earth composite refiner. Preferably, the Al-rare earth master alloy is selected from the group consisting of an Al-La master alloy, an Al-Ce master alloy, and an Al-Y master alloy. Preferably, the temperature of the melting process is 800 ℃ to 850 ℃. Preferably, the annealing process comprises treating at 550-570 ℃ for 5-7 hours. In a second aspect, the invention provides an aluminum-titanium-boron-rare earth composite refiner prepared by the preparation method in the first aspect. Preferably, the aluminum-titanium-boron-rare earth composite refiner comprises, by mass, 5% -6% of Ti, 1% -1.5% of B, 0.5% -1% of rare earth elements and the balance of Al. Preferably, the aluminum-titanium-boron-rare earth composite refiner comprises the following components in parts by mass of 5% of Ti, 1% of B, 0.5% of rare earth element and the balance of Al. In a third aspect, the present invention provides the use of an aluminium-titanium-boron-rare earth composite refiner according to the second aspect for the preparation of an aluminium alloy comprising at least one of Zr, cr. Preferably, the aluminum-titanium-boron-rare earth composite refiner is used in an amount of 0.1-0.3% of the mass of aluminum in the aluminum alloy. Compared with the prior art, the method has the following beneficial effects: The preparation method of the aluminum-titanium-boron-rare earth composite refiner comprises the following steps of carrying out melting treatment on aluminum, al-Ti intermediate alloy, al-rare earth intermediate alloy and Al-B intermediate alloy, uniformly stirring to obtain an aluminum alloy melt, carrying out degassing treatment on the aluminum alloy melt, slagging off, heating to obtain an aluminum alloy liquid, and casting, annealing and cooling the aluminum alloy liquid to obtain the aluminum-titanium-boron-rare earth composite refiner. The rare earth element is added, so that the activity of rare earth atoms is strong, on one hand, a part of free B and Ti are consumed to form rare earth compounds, on the other hand, the rare earth element reacts with Zr and Cr adsor