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Multifunctional improved material and preparation method thereof

A multi-functional, raw material technology, applied in the field of alloy modifiers, can solve the problems of slow melting of intermediate alloy modifiers, inability to modify simultaneously, and difficult control of the preparation process, so as to prevent impurity phase segregation, save slag and gas removal steps, Improvement of deterioration treatment efficiency

Inactive Publication Date: 2019-06-28
ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention: Aiming at the problems that in the current A356 aluminum alloy smelting process, simultaneous metamorphic treatment and slag removal and gas removal are impossible, and commonly used modificators are not effective and easy to be burned, the present invention provides a multifunctional improved material, Solve the above problems, and at the same time overcome the defects of slow melting of the intermediate alloy modifier, long incubation period, and difficult control of the preparation process

Method used

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  • Multifunctional improved material and preparation method thereof
  • Multifunctional improved material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: prepare multifunctional improved material as follows:

[0036] 1. Preparation of raw materials:

[0037] The purity of potassium chloride, sodium chloride, aluminum sulfate, strontium nitrate, strontium acetate, lanthanum fluoride, sodium fluorosilicate, potassium fluorozirconate, barium carbonate, chromium carbide, phosphotungstic acid, lanthanum nitrate, and Al is all greater than 99.9% wt%, the particle size is 150 mesh;

[0038] The composition of vermiculite is: Al 2 o 3 7.7wt%, H 2 O is 1.3wt%, Fe 2 o 3 is 8.4wt%, MgO is 10.2wt%, CaO+ZnO is 1.2wt%, and the balance is SiO 2 , the particle size of the vermiculite powder is 80 mesh;

[0039] The composition of A356 aluminum alloy is Si 5.0%, Fe 0.04%, Ti 0.1%, Mg 0.1%, Cu0.01%, Mn≤0.05%, Zn≤0.05%, Ca≤0.01%, and the balance is Al by weight percentage;

[0040] The inert gas is helium or argon.

[0041] 2. Preparation of multifunctional improved materials

[0042] (1) The lanthanum-containing co...

Embodiment 2

[0051] Embodiment 2: prepare multifunctional improved material as follows:

[0052] 1. Preparation of raw materials:

[0053] The purity of potassium chloride, sodium chloride, aluminum sulfate, strontium nitrate, strontium acetate, lanthanum fluoride, sodium fluorosilicate, potassium fluorozirconate, barium carbonate, chromium carbide, phosphotungstic acid, lanthanum nitrate, and Al is all greater than 99.9% wt%, the particle size is 250 mesh;

[0054] The composition of vermiculite is: Al 2 o 3 14.4wt%, H 2 O is 2.4wt%, Fe 2 o 3 is 18.9wt%, MgO is 21.5wt%, CaO+ZnO is 0.6wt%, and the balance is SiO 2 , the particle size of the vermiculite powder is 100 mesh;

[0055] The composition of A356 aluminum alloy is Si 7.0%, Fe 0.08%, Ti 0.2%, Mg 0.25%, Cu0.06%, Mn≤0.05%, Zn≤0.05%, Ca≤0.01%, and the balance is Al by weight percentage;

[0056] 2. Preparation of multifunctional improved materials

[0057] (1) The lanthanum-containing complex is prepared as follows: add 18g of p...

Embodiment 3

[0066] Embodiment 3: prepare multifunctional improved material as follows:

[0067] 1. Preparation of raw materials:

[0068] The purity of potassium chloride, sodium chloride, aluminum sulfate, strontium nitrate, strontium acetate, lanthanum fluoride, sodium fluorosilicate, potassium fluorozirconate, barium carbonate, chromium carbide, phosphotungstic acid, lanthanum nitrate, and Al is all greater than 99.9% wt%, the particle size is 200 mesh;

[0069] The composition of vermiculite is: Al 2 o 3 11.3wt%, H 2 O is 1.8wt%, Fe 2 o 3 is 13.5wt%, MgO is 16.1wt%, CaO+ZnO is less than 1.2wt%, and the balance is SiO 2 , the particle size of the vermiculite powder is 90 mesh;

[0070] The composition of A356 aluminum alloy is Si 6.0%, Fe 0.06%, Ti 0.15%, Mg 0.17%, Cu0.035%, Mn≤0.05%, Zn≤0.05%, Ca≤0.01%, and the balance is Al;

[0071] The inert gas is radon or xenon.

[0072] 2. Preparation of multifunctional improved materials

[0073] (1) The lanthanum-containing complex i...

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Abstract

The invention discloses a multifunctional improved material. The multifunctional improved material consists of the following components by weight: 2-3% of potassium chloride, 2-4% of sodium chloride,1-3% of aluminum sulfate, 3-5% of strontium nitrate, 4-6% of strontium acetate, 3-9% of lanthanum fluoride, 1-5% of sodium fluorosilicate, 1-3% of potassium fluorozirconate, 2-12% of vermiculite composite powder, and the balance being Al. Rare earth lanthanum element is able to change the shape and size of harmful phases formed by impurity elements and assist in improving the modification effect of various modification elements, and the vermiculite powder can be used as a modifier carrier for degassing and deslagging to improve the smelting efficiency. According to the preparation method, a three-step raw material addition method is adopted, modifying agents such as the sodium, the strontium, the rare earth lanthanum are successfully combined, the modifying activity is kept, eutectic silicon is effectively refined, the modifying effect is stable, the effective modifying time is long, the influence of burning loss of a single modifying element on the overall modifying effect is reduced,and a loose porous deposition body prepared by a jet deposition process enables the modifying effect to be fast without a latent period.

Description

technical field [0001] The invention relates to the field of alloy modifiers, in particular to a multifunctional improved material and a preparation method thereof. Background technique [0002] The silicon structure of aluminum alloy is composed of coarse five-lobed star-shaped primary silicon and long needle-shaped eutectic silicon. These silicon phases will severely split the Al matrix and cause stress concentration at the tip and corners of the Si phase. The alloy is easy to form cracks along the grain boundaries, or the plate-shaped Si itself cracks, which makes the alloy brittle, the mechanical properties, especially the elongation, are significantly reduced, and the cutting performance is not good. In order to change the existing state of silicon and improve the mechanical properties of the alloy, a modifier is generally added to the alloy to refine the primary silicon and eutectic silicon. [0003] There are many studies on aluminum alloy modifiers at home and abroa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C1/02C22C21/04
Inventor 赵浩峰张椿英于鹏柴阜桐夏俊
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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