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Aluminum alloy for high power radiator and purification method of melt of aluminum alloy

An aluminum alloy melt and radiator technology, applied in the field of aluminum alloy processing, can solve the problems of incomplete slag removal, defects in the surface quality of the radiator, segregation nodules, etc., and achieve easy surface processing, excellent thermal conductivity, and good ductility. sexual effect

Active Publication Date: 2014-12-24
ALNAN ALUMINIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the slag removal is not complete during the casting process, there are pores and inclusions inside the ingot, the casting temperature is too high, the smelting residence time is too long, the gas enters the ingot, and the feeding is improper during the casting process, resulting in interlayers and segregation on the surface of the ingot Tumors, etc., will lead to defects in the surface quality of the radiator

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Percentage by weight: Mg: 0.50%, Si: 0.40%, Fe﹤0.19%, Ti≤0.05%, Cr: ≤0.02%, Mn: ≤0.02%, Zn≤0.02%, Cu≤0.02%, other impurity elements Individual content ≤ 0.02%, total content of other impurity elements ≤ 0.15%, and the balance is Al, for batching, and smelting and purification according to the following steps:

[0023] (1) Smelting: Aluminum ingots and intermediate alloy elements with a purity of 99.70% and above are weighed according to the above ratio, and then put into a melting furnace for melting, using regenerative nozzle aluminum melting furnaces with good thermal efficiency and airtightness. For smelting, inflate and stir during the smelting process to speed up the smelting speed, and put 0.1% of the total amount of aluminum alloy into the furnace evenly into the slagging agent, and after the temperature of the molten aluminum reaches 690-730°C, carry out the slag removal operation on the slag inclusions of the molten aluminum , until there is no continuous piece...

Embodiment 2

[0031] Percentage by weight: Mg: 0.52%, Si: 0.42%, Fe﹤0.19%, Ti≤0.05%, Cr: ≤0.02%, Mn: ≤0.02%, Zn≤0.02%, Cu≤0.02%, other impurity elements Individual content ≤ 0.02%, total content of other impurity elements ≤ 0.15%, and the balance is Al, for batching, and smelting and purification according to the following steps:

[0032] (1) Smelting: Aluminum ingots and intermediate alloy elements with a purity of 99.70% and above are weighed according to the above ratio, and then put into a melting furnace for melting, using regenerative nozzle aluminum melting furnaces with good thermal efficiency and airtightness. For smelting, inflate and stir during the smelting process to accelerate the smelting speed, and put 0.15% of the total amount of aluminum alloy into the furnace evenly to put slagging agent into the furnace. After the temperature of the molten aluminum reaches 690-730°C, perform slag removal operation on the slag inclusion of the molten aluminum , until there is no continuou...

Embodiment 3

[0040] Percentage by weight: Mg: 0.54%, Si: 0.43%, Fe﹤0.19%, Ti≤0.05%, Cr: ≤0.02%, Mn: ≤0.02%, Zn≤0.02%, Cu≤0.02%, other impurity elements Individual content ≤ 0.02%, total content of other impurity elements ≤ 0.15%, and the balance is Al, for batching, and smelting and purification according to the following steps:

[0041] (1) Smelting: Aluminum ingots and intermediate alloy elements with a purity of 99.70% and above are weighed according to the above ratio, and then put into a melting furnace for melting, using regenerative nozzle aluminum melting furnaces with good thermal efficiency and airtightness. For smelting, inflate and stir during the smelting process to speed up the smelting speed, and put 0.18% of the total aluminum alloy into the furnace evenly to put slagging agent into the furnace. After the temperature of the molten aluminum reaches 690-730°C, carry out the slag removal operation on the slag inclusion of the molten aluminum , until there is no continuous piec...

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Abstract

The invention relates to an aluminum alloy for a high power radiator. The aluminum alloy is characterized by being prepared from the following chemical components in percentage by weight: 0.50-0.55% of Mg, 0.40-0.45% of Si, less than 0.19% of Fe, less than or equal to 0.05% of Ti, less than or equal to 0.02% of Cr, less than or equal to 0.02% of Mn, less than or equal to 0.02% of Zn, less than or equal to 0.02% of Cu, less than or equal to 0.02% of a single content of other impurity elements, less than or equal to 0.15% of total content of other impurity elements and the balance of Al. According to a purification method of the melt of the aluminum alloy for the high power radiator, the hydrogen content in the aluminum alloy melt is reduced to below 0.07ml / 100g and the dregginess of the melt is reduced to below 0.01% by virtue of process control of aluminum alloy smelting, refining, degassing, deslagging and the like, so that the processing quality requirement on the aluminum alloy for the high power radiator is satisfied.

Description

technical field [0001] The invention relates to the field of aluminum alloy processing, in particular to a method for purifying aluminum alloys for high-power radiators and their melts. Background technique [0002] In the power electronics industry, IGBT (Insulated Gate Bipolar Transistor) is a composite fully-controlled voltage-driven power semiconductor device composed of BJT (Bipolar Transistor) and MOS (Insulated Gate Field Effect Transistor). High-frequency high-power and medium-power applications occupy a dominant position, and are widely used in converter systems with a DC voltage of 600V and above, such as AC motors, frequency converters, switching power supplies, lighting circuits, traction drives and other fields. As the core component of the converter system, the IGBT module needs to operate normally at low temperature, and it has a large current and high voltage during operation, which generates a lot of heat, which leads to an increase in the temperature of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/03C22C1/06
Inventor 周雄多何小梅雷素萍李永弟
Owner ALNAN ALUMINIUM CO LTD
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