Aluminium alloy refiner and preparation method and application thereof

a technology of aluminum alloy and refiner, which is applied in the field of aluminum alloy smelting, can solve the problems of high material cost, complex preparation process, and relatively low mechanical properties of alpha-al dendrite structur

Inactive Publication Date: 2016-09-22
CITIC DICASTAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0027]Compared with the prior art, the present i

Problems solved by technology

However, the as-cast structure of the A356.2 aluminium alloy which is not subjected to refinement and modification treatment is a thickly platy or needle-shaped eutectic silicon and alpha-Al dendritic structure with relatively low mechanical properties.
As the related TiC is nanoparticles, the material cost is high, and a preparation process is complicated.
It is necessary to use argon or nitrogen for dispersing the nanopowder to the melt, which increases the complexity of the process, prolongs the cycle of the whole process and does not facilitate industrial production.
The powder may be used only after the powder is tightly p

Method used

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  • Aluminium alloy refiner and preparation method and application thereof
  • Aluminium alloy refiner and preparation method and application thereof
  • Aluminium alloy refiner and preparation method and application thereof

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Experimental program
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Embodiment Construction

[0035]Step one, preparing the refiner strips by rapid solidification.

[0036]Making small industrial Al—Ti—B intermediate alloy blocks (the length, width and height of each alloy block are not more than 6 mm, and each alloy block comprises 5.0% of Ti, 1.0% of B, less than 0.15% of Fe, Cu, Mg, Mn and the balance of Al by mass and is purchased from KBM Affilips Company), Ti particles (the diameter of the Ti particles is not more than 2 mm and the purity of the Ti particles is 99.99%) and B particles (the diameter of the B particles is not more than 2 mm and the purity of the B particles is 99.99%) into the A1-8Ti-3B component, mixing the above materials (ensuring that the parts by weight of Ti, B and Al elements are as shown in the tablet) and placing them into the quartz tube provided with a small opening having the diameter of 0.4 mm at the lower end; heating the induction coil of the WK-IIB vacuum strip-spun machine until the test blocks in the quartz tube are completely melted, and ...

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Abstract

The present invention provides an aluminium alloy refiner. The aluminium alloy refiner is characterized by comprising 7 to 10 parts of Ti, 2 to 3 parts of B and the balance of Al by weight, for example, 8 parts of Ti, 3 parts of B and 89 parts of Al by weight. The aluminium alloy refiner is prepared by rapid solidification. After the refiner is added to A356.2 aluminium alloy, the grain size of the alloy is significantly reduced than that of the aluminium alloy treated by a conventional refiner. Moreover, the solubility of metals in liquid may be increased due to rapid solidification, such that the refiner is more easily absorbed by the aluminium alloy melt after being added to the aluminium alloy.

Description

FIELD OF THE INVENTION[0001]The present invention relates to the field of aluminium alloy smelting, and particularly relates to an aluminium alloy refiner and a preparation method and application thereof.BACKGROUND OF THE INVENTION[0002]A356.2 aluminium alloy has excellent characteristics such as good fluidity, no thermal cracking tendency, low linear shrinkage, small specific gravity and good corrosion resistance, and is a main material used in automobile hubs. However, the as-cast structure of the A356.2 aluminium alloy which is not subjected to refinement and modification treatment is a thickly platy or needle-shaped eutectic silicon and alpha-Al dendritic structure with relatively low mechanical properties. Therefore, it is necessary to add modification elements and grain refining elements, such that morphologies of eutectoid silicon are transformed from thickly flaky shapes or needle shapes into finely spherical shapes or rod shapes, and simultaneously, alpha-Al grains are refi...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C1/02C22C21/02B22D11/06B22D11/00C22C21/00B22D21/00
CPCC22C1/06C22C21/00C22C1/026C22C21/02B22D11/0611B22D11/005B22D21/007B22D21/04B22D27/20B22D1/00B22D1/002B22D7/005C22B21/06
Inventor WANG, YONGNINGZHU, ZHIHUALIU, CHUNHAILI, CHANGHAIA, LATENGWANG, LISHENGZHANG, ZHENDONGBAI, BANGWEIFANG, ZHENGZHAO, WEIMIN
Owner CITIC DICASTAL
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