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Covering comprehensive material as well as preparation method and application thereof

A technology of comprehensive materials and composite powders, applied in the field of aluminum alloy modifiers, can solve the problems of difficult control of the preparation process, inability to simultaneously metamorphose treatment, poor effect of modifiers, etc., so as to save the steps of removing slag and degassing, and improve the efficiency of modification treatment. , the effect of improving the melting efficiency

Inactive Publication Date: 2019-07-09
ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The technical problem to be solved by the present invention: Aiming at the problem that in the current A356 aluminum alloy smelting process, simultaneous metamorphic treatment and slag removal and gas removal are impossible, and the effect of commonly used modificators is not good, the present invention provides a covering composite material to solve the above problems, and at the same time Overcome the defects of slow melting, long incubation period, and difficult control of the preparation process of the intermediate alloy modifier, prevent the melt from inhaling, oxidizing, and prevent pores in the casting

Method used

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  • Covering comprehensive material as well as preparation method and application thereof
  • Covering comprehensive material as well as preparation method and application thereof
  • Covering comprehensive material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: prepare and apply covering composite material as follows:

[0034] 1. Preparation of raw materials:

[0035] Aluminum chloride, manganese acetate, sodium nitrate, zinc fluoride, potassium chloride, sodium chloride, sodium fluoride, sodium fluoroaluminate, zinc carbide, titanium carbide, silicon oxide have no crystal water, and the purity is greater than 99.9wt %, the particle size is 120 mesh;

[0036] The composition of potassium feldspar clay powder is: K 2 O is 8.93wt%, Al 2 o 3 is 15.16wt%, loss on ignition is 9.34wt%, Fe 2 o 3 0.21wt%, MgO 1.21wt%, CaO 0.23wt%, BaO 0.32wt%, Na 2 O is 0.12wt%, P 2 o 5 0.18wt%, TiO 2 0.33wt%, MnO 0.22wt%, S 0.17wt%, the balance is SiO 2 , the particle size of the potassium feldspar clay powder is 100 mesh.

[0037] The composition of A356 aluminum alloy is Si 5.9%, Fe 0.08%, Mg 0.42%, Ti 0.01%, Mn 0.11%, Cu 0.15%, Zn 0.04%, and the balance is Al.

[0038] Petroleum pitch is a solid powder with a particle siz...

Embodiment 2

[0048] Embodiment 2: prepare and apply covering composite material as follows:

[0049] 1. Preparation of raw materials:

[0050] Aluminum chloride, manganese acetate, sodium nitrate, zinc fluoride, potassium chloride, sodium chloride, sodium fluoride, sodium fluoroaluminate, zinc carbide, titanium carbide, silicon oxide have no crystal water, and the purity is greater than 99.9wt %, the particle size is 240 mesh;

[0051] The composition of potassium feldspar clay powder is: K 2 O is 11.13wt%, Al 2 o 3 is 20.21wt%, loss on ignition is 11.81wt%, Fe 2 o 3 0.66wt%, MgO 1.83wt%, CaO 0.69wt%, BaO 1.18wt%, Na 2 O is 0.26wt%, P 2 o 5 0.21wt%, TiO 2 0.55wt%, MnO 0.35wt%, S 0.43wt%, balance SiO 2 , the particle size of the potassium feldspar clay powder is 140 mesh.

[0052] The composition of the A356 aluminum alloy is Si 6.4%, Fe 0.10%, Mg 0.68%, Ti 0.09%, Mn 0.23%, Cu 0.25%, Zn 0.07%, and the balance is Al.

[0053] Petroleum pitch is a solid powder with a particle size...

Embodiment 3

[0063] Embodiment 3: prepare and apply covering composite material as follows:

[0064] 1. Preparation of raw materials:

[0065] Aluminum chloride, manganese acetate, sodium nitrate, zinc fluoride, potassium chloride, sodium chloride, sodium fluoride, sodium fluoroaluminate, zinc carbide, titanium carbide, silicon oxide have no crystal water, and the purity is greater than 99.9wt %, the particle size is 180 mesh;

[0066] The composition of potassium feldspar clay powder is: K 2 O is 10.11wt%, Al 2 o 3 is 17.66wt%, loss on ignition is 10.24wt%, Fe 2 o 3 0.43wt%, MgO 1.55wt%, CaO 0.45wt%, BaO 0.77wt%, Na 2 O is 0.20wt%, P 2 o 5 0.19wt%, TiO 2 0.42wt%, MnO 0.28wt%, S 0.28wt%, balance SiO 2 , the particle size of the potassium feldspar clay powder is 120 mesh.

[0067] The composition of A356 aluminum alloy is Si 6.15%, Fe 0.09%, Mg 0.55%, Ti 0.05%, Mn 0.17%, Cu 0.20%, Zn 0.05%, and the balance is Al.

[0068] Petroleum pitch is a solid powder with a particle size of...

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Abstract

The invention discloses a covering comprehensive material as well as a preparation method and application thereof, and relates to the field of aluminum alloy modifiers. The covering comprehensive material is prepared from the following raw materials of, in percentage by weight, 3%-9% of aluminum chloride, 0.5%-0.8% of manganese acetate, 2%-9% of sodium nitrate, 0.11%-0.18% of zinc fluoride, 8%-12%of potassium chloride, 12%-16% of sodium chloride, 6%-10% of sodium fluoride, 9%-18% of composite powder and the balance sodium fluoroaluminate; when the covering comprehensive material is used as the modifier, the modification refinement elements are matched with each other, so that the modification effect is excellent; when the modifier is used as a covering agent, so that the melt can be prevented from being absorbed and oxidized, the heat preservation effect is good, the exhaust emission is promoted, the potash feldspar clay powder in the raw materials can be used as a modifier carrier toremove gas and remove slag, the smelting step is simplified, the smelting efficiency is improved, and the alloy hardness can be remarkably improved by the rich aluminum oxide and silicon oxide. Whenthe aluminum alloy is smelted, the strength, the plasticity and the hardness of an aluminum alloy casting can be remarkably improved by using the covering comprehensive material.

Description

technical field [0001] The invention relates to the field of aluminum alloy modifiers, in particular to a covering composite material and its preparation method and application. 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] Common modification methods include adding one element ...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C21/04
CPCC22C1/06C22C21/04
Inventor 赵浩峰张椿英于鹏夏俊
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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