Local vacuum casting method for aluminum alloy

A partial vacuum, aluminum alloy technology, applied in the field of partial vacuum casting of aluminum alloys, can solve the problems of high energy consumption, thick dendrites, and no specific solutions are proposed, and achieve stable dendrite spacing, fewer hole defects, and improved rolling. The effect of the slag phenomenon

Active Publication Date: 2020-04-14
佛山市三水凤铝铝业有限公司 +1
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  • 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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  • Local vacuum casting method for aluminum alloy
  • Local vacuum casting method for aluminum alloy
  • Local vacuum casting method for aluminum alloy

Examples

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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 melt one, continue to add the above-mentioned components Mn, Cr, Fe, Ti in the weight percentage in the melting furnace, control the melt temperature in the melting furnace to be 650-750 ℃ ​​to The alloy is completely melted, and the temperature is maintained at 650°C, and Mg 4.18% is added until the ...

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 melt one, continue to add the above-mentioned components Mn, Cr, Fe, Ti in the weight percentage in the melting furnace, control the melt temperature in the melting furnace to be 650-750 ℃ ​​to The alloy is completely melted, and the temperature is kept at 750°C, and Mg 5.42% is added until the melt is uniform to...

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 the melt, continue to add the above-mentioned components Mn, Cr, Fe, Ti in the weight percentage to the melting furnace, and control the temperature of the melt in the melting furnace to 700 ° C until the alloy is completely Melt, and keep the temperature at 700°C and add Mg4.73% t...

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Abstract

The invention provides a local vacuum casting method for aluminum alloy. A raw material is sequentially added step by step, and ultrasonic vibration treatment and mechanical stirring treatment are combined, so refinement of a melt structure can be remarkably promoted, the dendritic crystal spacing is reduced, and the dendritic crystal spacing is stable; an alloy casting is formed under the actionof vacuum and pressure formed at the upper part of a crystallizer through the local vacuumizing casting method, the grain diameter is small, the structure is compact, and the hole defects are few; theconnection among a filter chamber box, a molten aluminum inlet and a crystallizer is always kept in a vacuum state, so the situations of segregation, turbulence, easy gas entrapment and oxidation ofthe aluminum alloy in the production process are reduced, the shifting amplitude of the liquid level of the aluminum alloy is stable, and the slag entrapment phenomenon can be obviously improved; andthe local vacuumizing casting method for aluminum alloy has the advantages of simple device, and easiness in operation, and the prepared aluminum alloy has no obvious defects such as cracks, pits andslag inclusion on the surface, and has the advantages of large 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 Applications(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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