Aluminium alloy casting manufacturing process

A technology for aluminum alloy castings and manufacturing processes, applied in the field of casting manufacturing processes, can solve the problems of processing time and temperature needing manual statistics, cracks, shortening metal life and other problems, so as to facilitate manual control and operation, improve processing efficiency, and improve mechanical performance effect

Inactive Publication Date: 2012-07-25
TIANJIN QIANXIN NONFERROUS METAL PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the temperature of the aluminum alloy liquid during the melting process is not easy to be accurately controlled, and the temperature of the aluminum alloy liquid during the casting process will gradually decrease with the progress of the casting process, which leads to the instability of the casting temperature
If the casting temperature is too high, due to the increased amount of gas and shrinkage of the molten metal, it is easy to cause pores, shrinkage cavities, and even cracks in the casting, and it will also

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Manufacturing process of the present invention comprises the following steps:

[0014] Melting: Put the pretreated aluminum alloy with a clean surface into a coking coal furnace and heat it to 720°C. After the aluminum alloy is completely melted, add a slag cleaning agent to generate solid impurities, which will float on the surface of the aluminum alloy liquid, filter Remove impurities;

[0015] Insulation: Pour the alloy liquid into the holding furnace. The temperature of the holding furnace is maintained at 720°C. Dry nitrogen is blown into the alloy liquid through the carbon rod in the alloy liquid. The blowing time is 9 minutes to remove the gas in the alloy liquid;

[0016] Casting: Preheat the metal mold with clean inner wall to 190°C, spray refractory paint evenly on the inner wall, then pour the alloy liquid into the metal mold, after the alloy liquid cools and solidifies naturally, open the mold and take out the casting;

[0017] Trimming: Cut off the gate co...

Embodiment 2

[0021] Manufacturing process of the present invention comprises the following steps:

[0022] Melting: Put the pretreated aluminum alloy with a clean surface into a coking coal furnace and heat it to 740°C. After the aluminum alloy is completely melted, add a slag cleaning agent to generate solid impurities, which will float on the surface of the aluminum alloy liquid, filter Remove impurities;

[0023] Insulation: Pour the alloy liquid into the holding furnace. The temperature of the holding furnace is maintained at 740°C. Dry nitrogen is blown into the alloy liquid through the carbon rod in the alloy liquid. The blowing time is 12 minutes to remove the gas in the alloy liquid;

[0024] Casting: Preheat the metal mold with a clean inner wall to 220°C, spray refractory paint evenly on the inner wall, then pour the alloy liquid into the metal mold, after the alloy liquid cools and solidifies naturally, open the mold and take out the casting;

[0025] Trimming: Cut off the gate...

Embodiment 3

[0029] Manufacturing process of the present invention comprises the following steps:

[0030] Melting: Put the pretreated aluminum alloy with a clean surface into a coking coal furnace and heat it to 730°C. After the aluminum alloy is completely melted, add a slag cleaning agent to generate solid impurities, which will float on the surface of the aluminum alloy liquid and filter Remove impurities;

[0031] Insulation: Pour the alloy liquid into the holding furnace. The temperature of the holding furnace is maintained at 730°C. Dry nitrogen is blown into the alloy liquid through the carbon rod in the alloy liquid. The blowing time is 10 minutes to remove the gas in the alloy liquid;

[0032] Casting: Preheat the metal mold with a clean inner wall to 210°C, spray refractory paint evenly on the inner wall, then pour the alloy liquid into the metal mold, after the alloy liquid cools and solidifies naturally, open the mold and take out the casting;

[0033] Trimming: Cut off the g...

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PUM

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Abstract

The invention provides an aluminium alloy casting manufacturing process, which has high working efficiency, high product percent of pass and good casting mechanical property. The aluminium alloy casting manufacturing process is characterized by comprising the following steps: melting, insulation, casting, finishing, thermal treatment and abrasive blasting. Dry nitrogen is blown into aluminium alloy liquid by a carbon rod, the nitrogen directly enters the aluminium alloy liquid so as to be capable of better taking away gas of the aluminium alloy liquid and removing the gaseous impurities in the aluminium alloy liquid and reducing the possibility that castings manufactured have air holes; and a holding furnace can control the temperature of the alloy liquid to maintain stable, thus further leading the temperature of the alloy liquid to maintain stable, avoiding the defects that the castings have air holes and sink holes, can not be insufficiently cast, or are unclear in outline, and the like, and improving the product percent of pass.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a casting manufacturing process. Background technique [0002] Due to the advantages of high tensile strength, good comprehensive mechanical properties of elongation, excellent corrosion resistance and low cost, aluminum alloy castings are widely used in machinery, communication and other industries. With the continuous improvement of people's performance requirements for aluminum alloy castings, more and more attention has been paid to how to manufacture aluminum alloy castings with excellent performance. For example, the patent CN 101966575A "Aluminum alloy wheel casting process and heat treatment process" adopts steps such as melting, casting molding, and heat treatment to effectively solve the problems of casting oxidation inclusions, pores, shrinkage cavities, and porosity. However, it is not easy to accurately control the temperature of the aluminum alloy liquid during the...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22F1/04B22D31/00
Inventor 王忠志
Owner TIANJIN QIANXIN NONFERROUS METAL PRODS
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