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Method for reducing phosphorus modification temperature of aluminium- silicon alloy

A technology of aluminum-silicon alloy and modificator, which is applied in the field of reducing the temperature of phosphorus modification of aluminum-silicon alloy, can solve the problems of high burning loss rate of phosphorus element, low actual absorption rate, and poor working environment, so as to reduce the temperature of phosphorus modification and actual absorption The effect of high efficiency and less harmful smoke

Active Publication Date: 2009-11-18
ALUMINUM CORP OF CHINA QINGDAO LIGHT METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The more commonly used modification method for hypereutectic aluminum-silicon alloy is to add phosphorus-containing modifiers to the aluminum melt. Usually, the addition temperature of phosphorus-containing modifiers is above 800°C, and the temperature is relatively high. Higher modification temperatures have the following disadvantages: The burning loss rate of phosphorus element is high, the actual absorption rate is low, the energy consumption is high, the flue gas generated is large, and the working environment is poor
Heating and cooling, the huge temperature difference will inevitably cause a lot of waste of heat energy

Method used

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  • Method for reducing phosphorus modification temperature of aluminium- silicon alloy
  • Method for reducing phosphorus modification temperature of aluminium- silicon alloy

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Embodiment 1

[0024] In the method for reducing the temperature of phosphorus deterioration in aluminum-silicon alloys according to the present invention, the ingredients of the aluminum melt are: Si 18%, Cu 4.8%, Mg 0.6%, Mn 0.05%, Ti 0.1% and the rest of Al, which are added to the aluminum melt Add an aluminum-phosphorus master alloy modifier to the body, control the temperature at 690-710°C, and apply an induction magnetic field at the same time. The magnetic field frequency of the induction magnetic field is selected as 2000Hz, the magnetic induction intensity is selected as 0.6T, and the modification control time is 20 minutes, and then conventional casting is carried out. That's it.

Embodiment 2

[0026] In the method for reducing the temperature of phosphorus deterioration in aluminum-silicon alloys according to the present invention, the ingredients of the aluminum melt are: Si 18%, Cu 4.8%, Mg 0.6%, Mn 0.05%, Ti 0.1% and the rest of Al, which are added to the aluminum melt Add a copper-phosphorus master alloy modifier to the body, control the temperature at 700-720°C, and apply an induction magnetic field at the same time. The magnetic field frequency of the induction magnetic field is selected as 1500Hz, the magnetic induction intensity is selected as 0.7T, and the modification control time is 15 minutes, and then conventional casting is carried out. That's it.

Embodiment 3

[0028] In the method for reducing the temperature of phosphorus deterioration in aluminum-silicon alloys according to the present invention, the ingredients of the aluminum melt are: Si 18%, Cu 4.8%, Mg 0.6%, Mn 0.05%, Ti 0.1% and the rest of Al, which are added to the aluminum melt Add an aluminum-phosphorus master alloy modifier to the body, control the temperature at 690-710°C, and apply an induction magnetic field at the same time. The magnetic field frequency of the induction magnetic field is selected as 1800Hz, the magnetic induction intensity is selected as 0.5T, and the modification control time is 25 minutes, and then conventional casting is carried out. That's it.

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Abstract

The invention relates to a method for reducing the phosphorus modification temperature of an aluminum-silicon alloy, which belongs to the aluminum alloy smelting process. A phosphorus modification agent is added to the aluminum melt, and the temperature is controlled at 680-720 ° C. At the same time, an induction magnetic field is applied, and the magnetic field of the induction magnetic field The frequency selection is 1000-3000Hz, and the magnetic induction intensity is 0.3-1T. The metamorphic temperature is low, the phosphorus element burning loss rate is small, the actual absorption rate is high, and the waste of heat energy caused by heating and cooling is avoided, and the energy consumption is low.

Description

technical field [0001] The invention relates to a method for reducing the phosphorus metamorphic temperature of an aluminum-silicon alloy, which belongs to the aluminum alloy smelting process. Background technique [0002] The more commonly used modification method for hypereutectic aluminum-silicon alloy is to add phosphorus-containing modifiers to the aluminum melt. Usually, the addition temperature of phosphorus-containing modifiers is above 800°C, and the temperature is relatively high. Higher modification temperatures have the following disadvantages: Phosphorus element has high burning loss rate, low actual absorption rate, high energy consumption, high flue gas generation, and poor working environment. However, the casting temperature of the hypereutectic aluminum-silicon alloy is controlled at 680-720°C, so the aluminum melt still needs to be lowered to 680-720°C before casting after high-temperature modification. Heating and cooling, the huge temperature difference...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C21/04
Inventor 曹新乐刘俊东孙敏孟祥永刘彬
Owner ALUMINUM CORP OF CHINA QINGDAO LIGHT METAL
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