A kind of method of partial vacuum casting of aluminum alloy

A partial vacuum and aluminum alloy technology, which is applied in the field of aluminum alloy partial vacuum casting, can solve the problems of thick dendrites, high energy consumption, and no specific solution is proposed, and achieve stable dendrite spacing, simple equipment, and improved slag entrainment The effect of the phenomenon

Active Publication Date: 2021-05-14
佛山市三水凤铝铝业有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another example is that the application number is PCT / CN2012 / 076106, which discloses an aluminum-silicon-magnesium cast aluminum alloy and its casting process. The tensile strength of the aluminum alloy is improved through cooling and aging treatment, but the overall energy consumption is large, and it cannot solve the problem of aluminum alloy. Coarse casting dendrites and segregation problems
[0004] In the field of aluminum alloy preparation, there are still many practical problems that need to be dealt with in its practical application, and no specific solutions have been proposed.

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  • A kind of method of partial vacuum casting of aluminum alloy
  • A kind of method of partial vacuum casting of aluminum alloy
  • A kind of method of partial vacuum casting of aluminum alloy

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Embodiment 1

[0036] A method for aluminum alloy partial vacuum casting, comprising the following steps:

[0037] (1) Based on the total weight of the aluminum alloy, the aluminum alloy elements include 4.2% Mg, 0.03% Mn, 0.02% Cr, 0.35% Fe, 0.07% Ti, 0.25% Cu, and 0.25% trace elements %, the balance is Al and other inevitable impurities, the single content of other inevitable impurities is ≤0.05%, and the total amount is ≤0.15%;

[0038] (2) Add aluminum ingots to the smelting furnace of the vacuum electromagnetic guide device, and heat the aluminum ingots in the smelting furnace to melt into melt one;

[0039] (3) Carry out ultrasonic vibration treatment and mechanical stirring treatment to the melt, continue to add the above-mentioned components Mn, Cr, Ti in weight percentage to the smelting furnace, control the temperature of the melt in the smelting furnace to be 650-750 ° C until the alloy is completely Melt, and keep the temperature at 650°C and add Mg 4.18%, until the melt is unif...

Embodiment 2

[0045] A method for aluminum alloy partial vacuum casting, comprising the following steps:

[0046] (1) Based on the total weight of the aluminum alloy, the aluminum alloy elements include Mg5.5%, Mn0.35%, Cr0.25%, Fe0.65%, Ti0.12%, Cu0.45%, Trace elements 0.35%, the balance is Al and other inevitable impurities, the single content of other inevitable impurities is ≤0.05%, and the total amount is ≤0.15%;

[0047] (2) Add aluminum ingots to the smelting furnace of the vacuum electromagnetic guide device, and heat the aluminum ingots in the smelting furnace to melt into melt one;

[0048] (3) Carry out ultrasonic vibration treatment and mechanical stirring treatment to the melt, continue to add the above-mentioned components Mn, Cr, Ti in weight percentage to the smelting furnace, control the temperature of the melt in the smelting furnace to be 650-750 ° C until the alloy is completely Melt, and keep the temperature at 750°C and add Mg 5.42%, until the melt is uniform and melt...

Embodiment 3

[0054] A method for aluminum alloy partial vacuum casting, comprising the following steps:

[0055] (1) Based on the total weight of the aluminum alloy, the aluminum alloy elements include 5.0% of Mg, 0.3% of Mn, 0.15% of Cr, 0.45% of Fe, 0.09% of Ti, 0.32% of Cu, and 0.30% of trace elements %, the balance is Al and other inevitable impurities, the single content of other inevitable impurities is ≤0.05%, and the total amount is ≤0.15%;

[0056] (2) Add aluminum ingots to the smelting furnace of the vacuum electromagnetic guide device, and heat the aluminum ingots in the smelting furnace to melt into melt one;

[0057] (3) Carry out ultrasonic vibration treatment and mechanical stirring treatment to melt one, continue to add the above-mentioned components Mn, Cr, Ti in weight percentage in the smelting furnace, control the melt temperature in the smelting furnace to be 700 ℃ until the alloy is completely melted, And keep the temperature at 700°C and add Mg4.73% to obtain melt ...

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Abstract

The invention provides a method for partial vacuum casting of aluminum alloy. The raw materials are added step by step, combined with ultrasonic vibration treatment and mechanical stirring treatment, which can significantly promote the refinement of the melt structure, reduce the distance between dendrites, and the distance between dendrites Steady; alloy castings are formed under the action of vacuum and pressure on the upper part of the crystallizer by partial vacuum casting method. The connection between the aluminum alloys is always kept in a vacuum state, which reduces the occurrence of segregation, turbulence, gas entrainment and oxidation of the aluminum alloy during production, and the fluctuation range of the aluminum alloy liquid level is stable, which can significantly improve the phenomenon of slag entrainment; in addition, the aluminum alloy of the present invention The alloy partial vacuum casting method has simple equipment and simple operation, and the surface of the prepared aluminum alloy has no defects such as obvious cracks, pits and slag inclusions, and has the advantages of high tensile strength, good yield strength and high extrudability.

Description

technical field [0001] The invention relates to the field of alloy preparation, in particular to a method for aluminum alloy partial vacuum casting. Background technique [0002] Aluminum alloy castings have good mechanical properties, corrosion resistance, and high specific strength, but the dendrites of the aluminum alloy casting structure are relatively coarse, which will affect the composition segregation of the aluminum alloy and the distribution of micropores in the phase body, thus affecting the aluminum alloy casting structure. Therefore, to obtain aluminum alloy castings with fine grains and dense structure, the casting conditions must be controlled and improved to ensure good fluidity of liquid metal between dendrites. In addition, when casting aluminum alloy, because oxygen and other gases exist in the aluminum alloy liquid in the molecular state or composite gas, as the temperature of the casting aluminum alloy liquid drops to the solidification temperature, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22C1/02C22C1/06B22D18/06B22D18/08
CPCB22D18/06B22D18/08C22C1/026C22C1/06C22C21/08
Inventor 刘勇纯黄志其蔡知之刘胤伸杨杨周京辉周思根
Owner 佛山市三水凤铝铝业有限公司
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