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Alloy improved material and preparation method thereof

A technology for alloys and aluminum alloys, which is applied in the field of improved alloy materials and their preparation, can solve the problems of inability to modify simultaneously, difficult to control the preparation process, and poor effect of modifying agents, so as to save the steps of removing slag and gas and improve the modification process Efficiency, the effect of saving the step of slag removal

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

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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 modification and slag removal and gas removal are impossible, and commonly used modification agents are ineffective and easy to burn, the present invention provides an improved alloy material to solve the problem of The above problems, while overcoming the defects of slow melting of the casting master alloy modifier, long incubation period, and difficult control of the preparation process

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  • Alloy improved material and preparation method thereof
  • Alloy improved material and preparation method thereof
  • Alloy improved material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: Alloy improved material is prepared as follows:

[0035] 1. Preparation of raw materials:

[0036] The purity of aluminum oxalate, manganese acetate, strontium nitrate, sodium hexafluoroaluminate, potassium fluoroaluminate, potassium chloride, sodium chloride, graphite, silicon oxide, boron oxide, sodium molybdate, neodymium nitrate, and pure aluminum is greater than 99.9% wt%, the particle size is 100 mesh;

[0037] The composition of kaolinite clay powder is: Al 2 o 3 32.69wt%, H 2 O is 9.3wt%, Fe 2 o 3 1.12wt%, MgO 0.18wt%, CaO 0.32wt%, Ti 2 O is 0.15wt%, K 2 O+Na 2 O is 0.44wt%, the balance is SiO 2 , the particle size of the kaolinite clay powder is 80 mesh;

[0038] The inert gas is carbon dioxide or nitrogen.

[0039] The composition of A356 aluminum alloy is Si 4.1%, Fe 0.02%, Ti 0.13%, Mg≤0.22%, Cu≤0.13%, Mn≤0.12%, Zn≤0.03%, Ca≤0.02%, and the balance is Al;

[0040] The sodium salt modifier is prepared by fully mixing sodium hexafluoro...

Embodiment 2

[0051] Embodiment 2: Alloy improved material is prepared as follows:

[0052] 1. Preparation of raw materials:

[0053] The purity of aluminum oxalate, manganese acetate, strontium nitrate, sodium hexafluoroaluminate, potassium fluoroaluminate, potassium chloride, sodium chloride, graphite, silicon oxide, boron oxide, sodium molybdate, neodymium nitrate, and pure aluminum is greater than 99.9% wt%, the particle size is 150 mesh;

[0054] The composition of kaolinite clay powder is: Al 2 o 3 35.75wt%, H 2 O is 13.8wt%, Fe 2 o 3 1.99wt%, MgO 0.46wt%, CaO 1.22wt%, Ti 2 O is 0.34wt%, K 2 O+Na 2 O is 1.49wt%, the balance is SiO 2 , the particle size of the kaolinite clay powder is 100 mesh;

[0055] The inert gas is argon;

[0056] A356 aluminum alloy composition by weight percentage is Si 7.2%, Fe 0.06%, Ti 0.19%, Mg≤0.22%, Cu≤0.13%, Mn≤0.12%, Zn≤0.03%, Ca≤0.02%, the balance is Al

[0057] The sodium salt modifier is prepared by fully mixing 38wt% of sodium hexafluoroalu...

Embodiment 3

[0068] Embodiment 3: Alloy improved material is prepared as follows:

[0069] 1. Preparation of raw materials:

[0070] The purity of aluminum oxalate, manganese acetate, strontium nitrate, sodium hexafluoroaluminate, potassium fluoroaluminate, potassium chloride, sodium chloride, graphite, silicon oxide, boron oxide, sodium molybdate, neodymium nitrate, and pure aluminum is greater than 99.9% wt%, the particle size is 125 mesh;

[0071] The composition of kaolinite clay powder is: Al 2 o 3 34.09wt%, H 2 O is 11.34wt%, Fe 2 o 3 1.59wt%, MgO 0.32wt%, CaO 0.80wt%, Ti 2 O is 0.25wt%, K 2 O+Na 2 O is 0.91wt%, the balance is SiO 2 , the particle size of the kaolinite clay powder is 90 mesh;

[0072] The inert gas is radon gas.

[0073] The composition of A356 aluminum alloy is Si 5.7%, Fe 0.04%, Ti 0.16%, Mg≤0.22%, Cu≤0.13%, Mn≤0.12%, Zn≤0.03%, Ca≤0.02%, and the balance is Al;

[0074] The sodium salt modifier is prepared by fully mixing 32wt% of sodium hexafluoroalumin...

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Abstract

The invention relates to an alloy improved material and a preparation method thereof and relates to the field of aluminum alloy modifier. The alloy improved material is composed of spraying depositionpowder, sodium salt modifier and a binding agent. The weight ratio of the spraying deposition powder to the sodium salt modifier to the binding agent is (5-10):(1-3):1. Three modifiers strontium, sodium and rare earth neodymium are combined according to the characteristic, the modification activity is effectively retained, and the alloy improved material has the characteristics of being short inmodification incubation period, long in effective modification time and stable in modification effect. Kaolinite clay powder in raw materials can serve as a modifier carrier to remove gas and slag, the smelting efficiency is improved, and rich aluminum oxide and silicon oxide can improve hardness of an alloy. The luminescence property of a neodymium element enables the aluminum alloy to have the luminescence characteristics, and coating of luminescent materials is not needed. According to the preparation method, the spraying deposition method is adopted for further smelting and preparing tinyintermediate alloy powder, the intermediate alloy powder is bonded with the sodium modifier for extrusion forming, the modifier can be dissolved and dispersed rapidly, the incubation period is shortened, and rapid and effective modification is achieved.

Description

technical field [0001] The invention relates to the field of alloy modifiers, in particular to an alloy improving 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 abroad. The c...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C1/02C22C21/04
Inventor 赵浩峰张椿英于鹏夏俊柴阜桐
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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