A kind of granular refining agent for magnesium alloy and preparation method thereof
A refining agent and magnesium alloy technology, which is applied in the field of granular refining agent for magnesium alloy and its preparation, can solve the problems of surface oxidation of magnesium alloy melt, sinking and taking away of refining agent, etc., so as to reduce the filtering pressure and improve the wrapping ability. , the effect of large surface adsorption
Active Publication Date: 2020-05-22
闻喜县凯利达贸易有限公司
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Problems solved by technology
[0004] The invention provides a granular refining agent for magnesium alloys and a preparation method thereof, in order to solve the problem that the existing refining agent cannot float quickly because the density is similar to that of the magnesium alloy melt, and the slag inclusion inside the magnesium alloy melt is taken away. The problem of poor refining effect, and the refining agent covering the surface of the magnesium alloy melt will also sink, making the surface of the magnesium alloy melt further oxidized
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preparation example Construction
[0041] The preparation method of the above-mentioned granular refining agent for reducing aluminum alloy burning loss is illustrated by Examples 1-5, and the process parameters of Examples 1-5 are shown in Table 1 below:
[0042] Table 1 is a kind of process parameter of the preparation method embodiment 1~5 of granular refining agent for magnesium alloy
[0043] Example Parameters Example 1 Example 2 Example 3 Example 4 Example 5 First heating temperature (°C) 420 430 440 455 465 Heating rate (℃ / min) 3 2.5 2.5 2 2 The first heat preservation time (min) 20 20 22 22 25 The second heating temperature (°C) 700 710 750 750 770 The second holding time (min) 50 55 60 60 65 Sieve mesh (mesh) 200 230 260 260 300 binder epoxy resin epoxy resin Phenolic Resin Phenolic Resin Phenolic Resin
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Abstract
The invention relates to the technical field of refining agent preparation, and particularly discloses a particle refining agent for magnesium alloy and a preparation method thereof. The preparation method comprises the steps that raw materials are put into a melting furnace to be smelted after being mixed, wherein the smelting temperature is higher than or equal to 700 DEG C; the melted materialis condensed to solid after being subjected to heat preservation, and crushing is conducted; the mixture which is condensed to solid is crushed into powder; and the powder is made into the refining agent of which the particle size is 0.83-3.15 mm through a squeezing granulator. The refining agent comprises the raw materials of, by weight, 47-55 parts of MgC12, 5-8 parts of NaCl 35-40 parts of KCland the balance magnesium fluoride and magnesium oxide. The particle size of the particle refining agent is 0.83-3.15 mm, the density is 1.17-1.21 g / cm<3>, and the melting point is 440-480 DEG C. By adopting the technical scheme of the invention, the problem that an existing refining agent is poor in refining effect due to the fact that the density of the refining agent is close to that of magnesium alloy melt is solved.
Description
technical field [0001] The invention relates to the technical field of refining agent preparation, in particular to a granular refining agent for magnesium alloys and a preparation method thereof. Background technique [0002] Magnesium and magnesium alloys have low melting point and small heat capacity. When heated in air, they oxidize quickly, and when overheated, they are easy to burn. When they are molten without refining agent protection, they will burn violently. The oxide film on the surface of the magnesium alloy melt is loose, and magnesium is an active element with a strong binding force with oxygen. Therefore, during smelting, it reacts with oxygen, water vapor, and nitrogen in the atmosphere to form MgO, Mg 3 N 2 and H 2 Wait. Therefore, magnesium and magnesium alloys must always be carried out under refining agent and protective atmosphere during the smelting process. At the same time, in the process of transferring magnesium alloy and pouring molding, vario...
Claims
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IPC IPC(8): C22C1/06C22C23/00
CPCC22C1/06C22C23/00
Inventor 乔明炎冯文庚李英舟张峰俊
Owner 闻喜县凯利达贸易有限公司