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Heat treatment technology of aluminum alloy casting

An aluminum alloy casting, aluminum alloy technology, applied in heat treatment equipment, heat treatment process control, manufacturing tools and other directions, can solve the problem of poor processing performance and work performance of aluminum alloy castings, the smoothness and strength of castings cannot meet the requirements, and cannot be popularized and used. and other problems, to achieve the effect of improving the finish, good appearance quality and low one-time investment

Inactive Publication Date: 2010-12-29
平顶山市麟鑫铸造厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the aluminum alloy castings are processed by conventional methods, due to the imperfection of the temperature in the heat treatment kiln, the aging time and the design of the process flow, the smoothness and strength of the castings cannot meet the requirements, thus making the aluminum alloy castings The processing performance and work performance are poor, and the one-time investment of its complex process equipment is high, so it cannot be popularized and used in enterprises.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Step 1: Pour the molten aluminum alloy liquid into the designed mold to melt it into a casting and set it aside;

[0017] Step 2: Put the casting casted in step 1 into a high-temperature kiln for heat treatment, the temperature is controlled at 540°C, and the time is 10 minutes;

[0018] Step 3: Take out the casting after the heat treatment in Step 2, and put it in a normal temperature water pool to cool down, and the time is controlled within 5 minutes;

[0019] Step 4: Take out the casting from the pool and place it at room temperature for 8 hours;

[0020] Step 5: Place the castings treated in Step 4 in a low-temperature kiln for low-temperature heat treatment. The temperature is controlled at 160° C. for 4 hours, and then exit the kiln.

Embodiment 2

[0022] Step 1: Pour the molten aluminum alloy liquid into the designed mold to melt it into a casting and set it aside;

[0023] Step 2: Put the casting casted in step 1 into a high-temperature kiln for heat treatment, the temperature is controlled at 542°C, and the time is 20 minutes;

[0024] Step 3: Take out the casting after the heat treatment in Step 2, put it in a normal temperature water pool, and cool it down, and the time is controlled at 6 minutes;

[0025] Step 4: Take out the casting from the pool and place it at room temperature for 9 hours;

[0026] Step 5: Place the castings treated in Step 4 in a low-temperature kiln for low-temperature heat treatment. The temperature is controlled at 160° C. for 4.5 hours, and then exit the kiln.

Embodiment 3

[0028] Step 1: Pour the molten aluminum alloy liquid into the designed mold to melt it into a casting and set it aside;

[0029] Step 2: Put the casting casted in step 1 into a high-temperature kiln for heat treatment, the temperature is controlled at 545°C, and the time is 30 minutes;

[0030] Step 3: Take out the casting after the heat treatment in Step 2, put it in a normal temperature water pool, and cool it down, and the time is controlled at 8 minutes;

[0031] Step 4: Take out the casting from the pool and place it at room temperature for 10 hours;

[0032] Step 5: Place the castings treated in Step 4 in a low-temperature kiln for low-temperature heat treatment. The temperature is controlled at 160° C. for 5 hours, and then exit the kiln.

[0033] The heat treatment process of aluminum alloy castings in the present invention strictly controls the temperature and time in a high-temperature kiln, and adopts normal temperature water cooling treatment and aging treatment, ...

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Abstract

Heat treatment technology of aluminum alloy casting comprises the following steps: pouring the melted aluminum alloy into a mould for forming, melting into the casting, then placing the casting into ahigh-temperature kiln, controlling the temperature to 540-545 DEG C for 10-30 minutes, taking out the casting into a water tank in normal temperature for 5-8 minutes, then taking out from the water tank and placing for 8-10 hours, then placing the casting into a low-temperature kiln, controlling the temperature to 160 DEG C for 4-5 hours, and finally taking the casting out of the low-temperaturekiln. The heat treatment technology of aluminum alloy casting according to the invention has the advantages of excellently increased smoothness of the aluminum alloy casting, better appearance quality, effectively increased strength of the aluminum alloy casting up to 260-310Mpa thereby increasing the processing performance of the casting. The heat treatment technology of aluminum alloy casting according to the invention furthermore has the advantages of simple method and low one-time investment of the used apparatus.

Description

technical field [0001] The invention relates to a heat treatment process for castings, in particular to a heat treatment process for aluminum alloy castings. Background technique [0002] At present, in the field of aluminum alloy casting processing, this situation often occurs: castings are difficult to process, stick to the knife, and the strength of the casting is low, so that large cracks, fast wear, and easy corrosion occur in the subsequent working environment. Therefore, heat treatment must be carried out before processing aluminum alloy castings to improve its processing performance and lightness index. Heat treatment is to select a certain heat treatment specification, control the heating rate to a certain temperature and keep it warm Cool at a certain speed for a certain period of time to change the structure of the alloy. The main purpose is to improve the mechanical properties of the alloy, enhance corrosion resistance, improve processing performance, and obtain ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/04C21D11/00
Inventor 刘铁山
Owner 平顶山市麟鑫铸造厂