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Aluminum alloy refiner, preparation method therefor and use thereof

A technology of aluminum alloy and refining agent, applied in the field of aluminum alloy smelting, can solve the problems of complex use steps and processes, high cost, wide application, limited refining effect, etc. good effect

Inactive Publication Date: 2016-06-15
CITIC DICASTAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The master alloy involved in this method contains 3.75% to 5% of Ti and 0.75% to 1% of B. The content of the two elements is low, and the refining effect is limited.
Moreover, this method also contains 0.1% to 0.5% of the noble metal Sc element, and the manufacturing cost is high
[0006] In summary, the aluminum alloy refiners in the prior art are either expensive and difficult to be widely used, or the steps and processes are complicated, which limits their application in production

Method used

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  • Aluminum alloy refiner, preparation method therefor and use thereof
  • Aluminum alloy refiner, preparation method therefor and use thereof
  • Aluminum alloy refiner, preparation method therefor and use thereof

Examples

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Embodiment Construction

[0041] The first step is the preparation of rapid solidification refiner strips.

[0042] The small block of Al-Ti-B master alloy for industrial use (the length, width and height are not more than 6mm, the mass percentage of the constituent elements is: Ti5.0%, B1.0%, the sum of Fe, Cu, Mg, Mn is less than 0.15%, the balance Al, purchased from KBMAffilips company), Ti particles (diameter not greater than 2mm, purity 99.99%) and B particles (diameter not greater than 2mm, purity 99.99%) are made into Al-8Ti-3B composition, the above materials Mix (so that the element weight parts of Ti, B and Al are as shown in Table 1) and put into a quartz tube with a small hole with a diameter of 0.4 mm at the lower end. Heat the induction coil of the WK-IIB vacuum stripping machine until the test block in the quartz tube is completely melted, and spray the molten master alloy onto the copper roller with a rotation speed of 60 rpm to obtain a thickness of 8 μm and a width of 1.2 mm. The rap...

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Abstract

The invention provides an aluminum alloy refiner. The aluminum alloy refiner is characterized by comprising 7-10 parts by weight of Ti, 2-3 parts by weight of B and the balance of Al, for example, 8 parts by weight of Ti, 3 parts by weight of B and 89 parts by weight of Al. The aluminum alloy refiner is prepared through rapid solidification. By adding the refiner into an A356.2 aluminum alloy, the grain size of the alloy is remarkably reduced compared with that of the aluminum alloy treated by a conventional refiner. In addition, rapid solidification further can increase the solubility of metal in a liquid, so that the refiner is easily absorbed by an aluminum alloy melt when being added into the aluminum alloy.

Description

technical field [0001] The invention relates to the field of aluminum alloy smelting, in particular to an aluminum alloy refining agent, its preparation method and application. Background technique [0002] A356.2 aluminum alloy has excellent characteristics such as good fluidity, no thermal cracking tendency, small linear shrinkage, small specific gravity, and good corrosion resistance. It is the main material used for automobile wheels. However, the as-cast microstructure of the unrefined A356.2 aluminum alloy is coarse flake or needle-like eutectic silicon and α-Al dendrites, and its mechanical properties are low. Therefore, it is necessary to add modification elements and grain refinement elements to change the shape of eutectic silicon from thick flakes or needles to fine spherical or rods, and at the same time refine the α-Al grains to improve A356.2 Improve the performance of the alloy and expand its application range. At present, the commonly used refining agents f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C21/00B22D27/20B22D21/04
CPCB22D21/04B22D27/20C22C1/06C22C21/00B22D1/00B22D1/002B22D7/005C22B21/06C22C1/026C22C21/02
Inventor 王永宁朱志华刘春海李昌海阿拉腾王立生张振栋白帮伟方正赵维民
Owner CITIC DICASTAL
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