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Die-casting aluminum alloy modified by carbide nanoparticles and preparation method thereof

A nano-particle modification and casting aluminum alloy technology, which is applied in the field of industrial aluminum alloy and die-casting aluminum alloy, can solve the problems of coarse Fe-rich impurity phase, large eutectic silicon size, and low strength of die-casting parts, and achieve uniform and small size, The effect of refined size and low cost

Active Publication Date: 2021-08-24
迈特李新材料(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a carbide nano-particle modified die-casting aluminum alloy and its preparation method to solve the problem of Al-Si die-casting aluminum alloy grain size and eutectic silicon size coarse , Coarse Fe-rich impurity phase, low strength and poor elongation of die castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This example is an example of the method for preparing the die-casting aluminum alloy modified by carbide nanoparticles of the present invention, and the prepared die-casting aluminum alloy modified by carbide nanoparticles contains the following components in weight percentage: 2.5% Cu , 11% Si, 0.2% Mg, 0.6% Fe, 2.5% TiC, and the rest is Al. The salt used in the preparation process of this example is potassium tetrafluoroaluminate, the carbon source is 300 mesh activated carbon powder, the cation source is titanium oxide, and the binder is sucrose. Design carbide nanoparticles reinforced pure aluminum composite ingots containing 10wt% titanium carbide nanoparticles.

[0051] The preparation method of the die-casting aluminum alloy modified by carbide nanoparticles in this embodiment comprises the following steps:

[0052] (1) In situ synthesis of carbide nanoparticles reinforced pure aluminum composites

[0053] Mix titanium oxide powder, activated carbon powder, po...

Embodiment 2

[0061] This example is an example of the preparation method of the die-casting aluminum alloy modified by carbide nanoparticles of the present invention, and the prepared die-casting aluminum alloy modified by carbide nanoparticles contains the following components by weight percentage: 4% Cu, 11% Si, 0.2% Mg, 0.6% Fe, 1.5% ZrC, and the rest is Al. The salt used in the preparation process of this example is potassium tetrafluoroaluminate, the carbon source is 300 mesh activated carbon powder, the cation source is zirconia, and the binder is white sugar. Design carbide nanoparticles reinforced pure aluminum composite ingots containing 15 wt% zirconium carbide nanoparticles.

[0062] The preparation method of the die-casting aluminum alloy modified by carbide nanoparticles in this embodiment comprises the following steps:

[0063] (1) In situ synthesis of carbide nanoparticles reinforced pure aluminum composites

[0064] Mix zirconia powder, activated carbon powder, potassium ...

Embodiment 3

[0072] This example is an example of the preparation method of the die-casting aluminum alloy modified by carbide nanoparticles of the present invention, and the prepared die-casting aluminum alloy modified by carbide nanoparticles contains the following components in weight percent: 0.1% Cu, 6.0% Si, 0.1% Mg, 0.5% B 4 C, the rest is Al. The salt used in the preparation process of this example is sodium chloride, the carbon source is 300 mesh activated carbon powder, the cation source is boron oxide, and the binder is glucose. Design carbide nanoparticles reinforced pure aluminum composite ingots containing 5 wt% boron carbide nanoparticles.

[0073] The preparation method of the die-casting aluminum alloy modified by carbide nanoparticles in this embodiment comprises the following steps:

[0074] (1) In situ synthesis of carbide nanoparticles reinforced pure aluminum composites

[0075] Mix boron oxide powder, activated carbon powder, sodium chloride and glucose evenly to ...

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Abstract

The invention provides a die-casting aluminum alloy modified by carbide nanoparticles and a preparation method thereof. The present invention synthesizes carbide nanoparticles in situ in molten aluminum by using sugar and carbon salt mixed solids, and with the assistance of molten salts, so as to prepare die-casting aluminum alloys modified by carbide nanoparticles, wherein the obtained carbide nanoparticles have an average size of Controllable below 100nm, carbide nanoparticles can refine the grain size and eutectic silicon size of Al-Si die-casting alloys, eliminate dendrites, refine the size of Fe-rich impurity phases, and improve the strength and elongation of Al-Si alloys. rate and high temperature mechanical properties. The preparation method of the invention is simple, low in cost and convenient for industrial application.

Description

technical field [0001] The invention belongs to the technical field of industrial aluminum alloys and die-casting aluminum alloys, and in particular relates to a die-casting aluminum alloy modified by carbide nanoparticles and a preparation method thereof. Background technique [0002] Die casting is a commonly used casting process, which fills fluid metal or semi-fluid metal into a die-casting mold under pressure, and solidifies under pressure to form a casting. The die-cast aluminum alloy has high specific strength, specific stiffness, excellent electrical and thermal conductivity, and has broad application prospects in the fields of automobiles, aerospace and consumer electronics. According to statistics, the output of aluminum die castings accounts for more than 75% of all die castings. [0003] Al-Si alloy is a commonly used cast aluminum alloy. The eutectic silicon and α-Al grains of this die-cast alloy are coarse, resulting in poor strength and elongation. At the sa...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C21/02C22C32/00
Inventor 刘伟清池元清
Owner 迈特李新材料(深圳)有限公司
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