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Device and method for preparing metal semi-solid slurry

A semi-solid slurry and metal technology, applied in the field of metal rheological molding, can solve the problems of staying, complex production, poor slurry quality, etc., and achieve the effects of high production efficiency, strong applicability and simple equipment

Inactive Publication Date: 2010-09-01
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of all these patents is to simplify the production process and reduce the production cost, but it still makes the production either complicated or the quality of the slurry is poor. At present, it is difficult to popularize and apply it in production, and it is still in the laboratory research and development stage.

Method used

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  • Device and method for preparing metal semi-solid slurry
  • Device and method for preparing metal semi-solid slurry
  • Device and method for preparing metal semi-solid slurry

Examples

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preparation example Construction

[0016] The core of the preparation method of the metal semi-solid slurry of the present invention is to add solid particles of the same composition-self-inoculant during the solidification process of the metal alloy liquid, and its specific steps are:

[0017] (1) Process a small metal block with the same composition as the alloy to be processed - the self-inoculant, and introduce the self-inoculant into the melted alloy melt;

[0018] (2) Control the temperature of adding self-inoculant and pouring temperature of the melt to be 50-150°C above the liquidus temperature of the alloy;

[0019] (3) Carry out conventional melt treatment after melting of the inoculant.

[0020] In the method for rapidly preparing the metal semi-solid slurry of the present invention, the self-inoculant can be placed at the bottom of the sprue cup 4, or the self-inoculant can be added into the ladle 5 with stirring.

[0021] The alloy processed and treated by the method of the present invention is an...

Embodiment 1

[0024] The alloy grade used in this example is AZ91D, and its alloy composition is (mass percentage, the same below): Al 8.3-9.7%, Zn 0.35-1.0%, Mn 0.15%, Si≤0.10%, Cu≤0.030%, Fe 0.005%, Ni≤0.02%, and the rest is Mg.

[0025] In this embodiment, the method of placing the self-inoculant in the sprue cup 4 is suitable for continuous batch production of high-quality semi-solid slurry.

[0026] In practice, a part of the metal alloy with the same composition is mechanically cut into small pieces of metal of the same size for use (called self-inoculant), about 10mm×10mm×10mm; then another part of the metal with the same composition The alloy is melted, and after melting, it is subjected to conventional melt treatment, such as degassing and refining. At the same time, the processed self-inoculant is placed on the bottom of the sprue cup 4 . Then adjust the melt temperature to about 680°C for pouring, and open the cooling water outlet 2 and inlet 6; use the ladle 5 to pour into the...

Embodiment 2

[0028] The grade of alloy used in this example is AZ91D, and its alloy composition is: Al 8.3-9.7%, Zn0.35-1.0%, Mn 0.15%, Si≤0.10%, Cu≤0.030%, Fe 0.005%, Ni≤0.02 %, the rest is Mg.

[0029] This embodiment adopts the method of adding the self-inoculant into the ladle, which is suitable for small-batch, intermittent high-quality semi-solid slurry production.

[0030] The implementation process of this example is similar to Example 1, the difference is that the size of the self-inoculant agent is about 5mm×5mm×5mm; the self-inoculant is not placed at the bottom of the sprue cup, but is added to adjust the temperature 680-710 ℃ in the melt, that is, add it in the ladle, the amount of addition is 5% of the mass of the melt, and stir for 5 seconds; then pour it into the sprue cup that does not contain the inoculant.

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Abstract

The invention relates to a device and a method for preparing metal semi-solid slurry. In the device, a bracket 7 is arranged on a working plane, an alloy trough 3 is formed on an inclined plane on the upper part of the bracket 7; the device is provided with a casting ladle 5 for conveying melted metal; a funneled sprue cup 4 is arranged at the upper end of the alloy trough 3; the upper end opening of the sprue cup 4 is opposite to the casting ladle 5, while the lower end is communicated with the alloy trough 3; a cast 1 of which the internal cavity is communicated with the alloy trough 3 is arranged at the lower end of the alloy trough 3; and a cooling hole with a cooling water outlet 2 and a cooling water inlet 6 is formed on the alloy trough 3. The method for preparing the metal semi-solid slurry by using the device comprises the following steps of: processing a small metal block, namely a self-inoculating agent with the same components of the processed alloy; introducing the self-inoculating agent into the melted alloy melt; controlling the temperature of adding the self-inoculating agent into the melt and the temperature of pouring to be 50 to 150 DEG C higher than that of alloy liquidus; and performing conventional melt treatment after the self-inoculating agent is melted.

Description

technical field [0001] The present invention relates to the field of metal rheological forming, or thixoforming processing. Background technique [0002] Compared with the traditional liquid casting technology, the semi-solid forming processing technology has the advantages of improving product performance, saving energy, high production efficiency, and small thermal shock to the mold, and has attracted more and more attention. However, the popularization and use of this technology in industrial practice is still limited by the reason that the cost is higher than that of the traditional liquid forming technology. In order to reduce the application cost of semi-solid forming technology, the Chinese patent "A wave-shaped inclined plate vibration device and preparation method for preparing semi-solid alloy" (200710011510.9) uses the molten metal flow process to pass through the cooling plate commonly used in casting to improve the stirring effect Effect, the prepared semi-soli...

Claims

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Application Information

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IPC IPC(8): B22D1/00C22C1/00
Inventor 李元东马颖陈体军杨建曲俊峰张鹏邢博郝远
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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