CN101612658B - Method and device for preparing metal base nano composite material by ultrasound stirring and continuous casting - Google Patents
Method and device for preparing metal base nano composite material by ultrasound stirring and continuous casting Download PDFInfo
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- CN101612658B CN101612658B CN2009100414379A CN200910041437A CN101612658B CN 101612658 B CN101612658 B CN 101612658B CN 2009100414379 A CN2009100414379 A CN 2009100414379A CN 200910041437 A CN200910041437 A CN 200910041437A CN 101612658 B CN101612658 B CN 101612658B
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Abstract
The invention relates to a method and device for preparing metal base nano composite material by ultrasound stirring and continuous casting, and the device for realizing the invention is composed of a liquid storage casting ladle, a stirring device, a liquid level controller, an ultrasonic generator, a casting ladle, a control valve, a crystallizer and a dummy bar. The method adopts stirring and ultrasonic treatment, so that nano ceramics in metallic solution are in uniform distribution state; a sensor acquires signal and the height of the liquid level of the casting ladle is controlled; and the dummy bar is used for continuous dummy ingot downward or along horizontal direction. The invention effectively prevents agglomeration of ceramic granules. The invention is especially applicable to one time preparation of material in large size and preparation of different products such as parts, plates, wires, sections and the like by secondary processing, has wide industrial application range and has a broad market prospect.
Description
Technical field
The present invention relates to foundry engieering, specifically be meant a kind of ultrasonic agitation continuous casing and device for preparing metal-base nanometer composite material.
Background technology
Metal-base nanometer composite material has excellent physics, mechanics and tribological property.The technology of preparing of metal-base nanometer composite material and part thereof receives much concern always.Traditional metal-base nanometer composite material technology of preparing mainly contains high-energy ball milling, powder metallurgy, vacuum hotpressing and plastic working.But these method complex process, production efficiency is low, production cost is high, can not form complex parts, can only prepare small-size product.And utilize casting to prepare the technology of metal-base nanometer composite material, have the advantage that technical process is simple, production efficiency is high, cost is lower, can be shaped complex parts.But prepare in the metal-base nanometer composite material process at casting, the wetability between nano-ceramic particle and the metallic matrix is poor, and agglomeration easily takes place nano-ceramic particle, and nano-ceramic particle is difficult to be uniformly dispersed.Nearest discovers, adopts the power ultrasonic stirring technique effectively nano-ceramic particle to be uniformly dispersed in metal bath.To be people such as Yong Yang (disperse the research of the aluminum-base nano composite material that the nano SiC granule in the aluminium liquid makes to utilizing ultrasonic wave at " Study on bulk aluminum matrix nano-compositefabricated by ultrasonic dispersion of nano-sized SiC particles in moltenaluminum alloy " in representational work, Mater.Sci.Eng.A 380,2004, the 378-383) report in.This The thesis ultrasonic agitation technology makes the nano SiC ceramic particle dispersion be distributed in the A356 alloy melt, has obtained the equally distributed metal-base nanometer composite material of nano SiC ceramic particle.People such as Zhou Hengzhi have delivered and have been entitled as " nano Ce O
2Preparation of the high-energy ultrasonic of p/Zn-4.5%Al composite and mechanical property thereof " paper (the China YouSe Acta Metallurgica Sinica, 2007,757-761) this paper also adopts the high-energy ultrasonic stirring technique, has prepared CeO
2Mass fraction is respectively 1%, 2%, 3%, 4%, 5%, 6% nano Ce O
2The p/Zn-4.5%Al composite.But above these methods are subjected to the influence of ultrasonic power, and the melt amount of processing is very limited, and the volume that its maximum can not surpass crucible often has only several kilograms.Be evenly distributed for adopting foundry engieering to satisfy the big and nano-ceramic particle of melt treatment amount simultaneously, still do not have good method at present.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art part, a kind of ultrasonic agitation continuous casing that adopts foundry engieering to prepare the large scale metal-base nanometer composite material is provided.
Another object of the present invention is to realizing isolated plant of ultrasonic agitation continuous casing design of preparation metal-base nanometer composite material.
To achieve these goals, the ultrasonic agitation continuous casing of preparation metal-base nanometer composite material adopts following measure:
(1) stirs the metallic solution that is added with nano-ceramic particle in the liquid storage casting ladle, be evenly distributed in the metallic solution to nano-ceramic particle macroscopic view (millimeter level);
(2) macroscopical metallic solution that is evenly distributed with nano-ceramic particle is imported to the coupled logical cast casting ladle from the liquid storage casting ladle, adopt sensor to gather signal and also pass to liquid-level controller, control and keep cast casting ladle liquid level;
(3) adopt ultrasonic wave to handle the interior metallic solution of cast casting ladle, the nano-ceramic particle to metallic solution is in evenly distribution of microcosmic (micron order);
(4) by the continuous dummy ingot of dummy bar, the metallic solution in the cast casting ladle continuously flows in the crystallizer and solidifies, and obtains metal-base nanometer composite material.
Described continuous dummy ingot is continuously downwards a dummy ingot or continuously to the horizontal direction dummy ingot.
Described stirring is a mechanical agitation.
Described ultrasonic wave is a high-energy ultrasonic.
For the device of the ultrasonic agitation continuous casing of realizing above-mentioned preparation metal-base nanometer composite material is the continuous vertical casting device, formed by liquid storage casting ladle, agitator, liquid-level controller, supersonic generator, cast casting ladle, control valve, crystallizer, dummy bar; Connecting relation between them is as follows: the below perforate of liquid storage casting ladle is connected with the cast casting ladle; Sensor in the liquid-level controller places in the cast casting ladle; Mechanical agitator inserts in the liquid storage casting ladle; Supersonic generator places in the cast casting ladle; Cast casting ladle below perforate is connected with vertically arranged crystallizer, and the dummy bar of dummy ingot vertically is installed on the crystallizer lower end continuously, and control valve is positioned at the place that is communicated with of pouring into a mould casting ladle and crystallizer.
For realizing that above-mentioned preparation metal-base nanometer composite material is a horizontally continuously casting device with the device of ultrasonic agitation continuous casing, is made up of liquid storage casting ladle, agitator, liquid-level controller, supersonic generator, cast casting ladle, control valve, crystallizer, dummy bar; Connecting relation between them is as follows: the below perforate of liquid storage casting ladle is connected with the cast casting ladle; Sensor in the liquid-level controller places in the cast casting ladle; Mechanical agitator inserts in the liquid storage casting ladle; Supersonic generator places in the cast casting ladle; Cast casting ladle side perforate links to each other with crystallizer one end that level is installed, and the dummy bar level of dummy ingot is installed on the crystallizer other end continuously, and control valve is positioned at the place that is communicated with of pouring into a mould casting ladle and crystallizer.
Sensor in the described liquid-level controller place cast casting ladle height 2/3～3/4 between.
The present invention has following advantage and beneficial effect with respect to prior art:
(1) because the inventive method has adopted the high-energy ultrasonic stirring technique, in the metal-base nanometer composite material process of preparation, nano-ceramic particle in metallic matrix can reach micron order and evenly distribute, prevent or reduce the agglomeration generation of ceramic particle effectively, microscopic structure has repeatability, thereby material property is good.
(2) because the present invention has adopted continuous casing, so the inventive method is particularly suitable for the large-sized material of disposable preparation.
(3) metal-base nanometer composite material of the inventive method preparation has good processability, can be used for secondary operations and prepare different products such as part, sheet material, wire rod, section bar, so its industrial applicability is extensive, and market prospects are wide.
Description of drawings
Fig. 1 is the structural representation of the ultrasonic agitation continuous vertical casting device of preparation metal-base nanometer composite material; Wherein: 1-liquid storage casting ladle, 2-agitator, 3-liquid-level controller, 4-ultrasonic generator, 5-cast casting ladle, 6-control valve, 7-crystallizer, 8-dummy bar.
Fig. 2 is the structural representation of the ultrasonic agitation horizontally continuously casting device of preparation metal-base nanometer composite material.
The specific embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited thereto.
Embodiment 1
Present embodiment adopts ultrasonic agitation continuous vertical casting device, its structure as shown in Figure 1, this device is made up of liquid storage casting ladle 1, agitator 2, liquid-level controller 3, supersonic generator 4, cast casting ladle 5, control valve 6, crystallizer 7, dummy bar 8; Connecting relation between them is as follows: the 1 below perforate of liquid storage casting ladle is connected with cast casting ladle 5, and the volume of liquid storage casting ladle 1 is 5 times of cast casting ladle 5; Sensor in the liquid-level controller 3 place cast casting ladle 5 height 2/3～3/4 between; Mechanical agitator 2 inserts in the liquid storage casting ladle 1; Supersonic generator 4 places in the cast casting ladle 5; Cast casting ladle 5 below perforates are connected with vertically arranged crystallizer 7, and the dummy bar 8 of dummy ingot vertically is installed on crystallizer 7 lower ends continuously, and control valve 6 is positioned at the place that is communicated with of pouring into a mould casting ladle 5 and crystallizer 7.
Adopt said apparatus to realize the ultrasonic agitation continuous casing of preparation metal-base nanometer composite material, its step and process conditions thereof are as follows:
(1) pours the A356 melt of fusion into liquid storage casting ladle 1, locate to be incubated 10 minutes at 750 ℃, 2/3 depths with melt in the mechanical agitator 2 insertion liquid storage casting ladles 1, rotating speed with 700r/min stirs the A356 melt, stir 20～30 seconds to the certain whirlpool of melt generation, adding average diameter in the whirlpool center is the Al of 100nm
2O
3Ceramic particle, Al
2O
3The ceramic particle mass percent is 10% of total material, continues to stir 10 minutes with the rotating speed of 700r/min, makes nano-ceramic particle reach evenly distribution of millimeter level;
(2) aperture offered by the bottom of liquid storage casting ladle 1 is connected with cast casting ladle 5, solution in the liquid storage casting ladle 1 is flowed in the cast casting ladle 5, sensor by liquid-level controller 3 is gathered signal, controls and keep liquid level of solution height in the cast casting ladle 5 in 2/3～3/4 scope of cast casting ladle 5 height;
(3) open the ultrasonic generator 4 of insertion depth for 1/3 place of solution in the cast casting ladle 5, produce the high-energy ultrasonic vibration in solution, frequency is 20kHz, and power is 2.2kW, makes nano-ceramic particle reach the even distribution of micron order;
(4) metallic solution in the cast casting ladle continuously flows in the crystallizer 7 owing to the gravity effect, and solidifies in crystallizer 7; By dummy bar 8 downward dummy ingots continuously, obtain nanometer Al
2O
3The metal-base nanometer composite material that ceramic particle strengthens.Its tensile mechanical properties is as follows: tensile strength sigma
b=300MPa, σ
0.2=170MPa, δ=0.5%.
Embodiment 2
Present embodiment adopts horizontally continuously casting device, its structure as shown in Figure 2, this device is made up of liquid storage casting ladle 1, agitator 2, liquid-level controller 3, supersonic generator 4, cast casting ladle 5, control valve 6, crystallizer 7, dummy bar 8; Connecting relation between them is as follows: the 1 below perforate of liquid storage casting ladle is connected with cast casting ladle 5; Sensor in the liquid-level controller 3 places in the cast casting ladle 5; Mechanical agitator 2 inserts in the liquid storage casting ladle 1; Supersonic generator 4 places in the cast casting ladle 5; Cast casting ladle 5 side perforates link to each other with crystallizer 7 one ends that level is installed, and cast casting ladle 5 communicates with crystallizer 7, and dummy bar 8 levels of dummy ingot are installed on crystallizer 7 other ends continuously, and control valve 6 is positioned at the place that is communicated with of pouring into a mould casting ladle 5 and crystallizer 7.
Adopt said apparatus to realize the ultrasonic agitation continuous casing of preparation metal-base nanometer composite material, its step and process conditions thereof are as follows:
(1) pours the A356 melt of fusion into liquid storage casting ladle 1, locate to be incubated 10 minutes at 750 ℃, 2/3 depths with melt in the mechanical agitator 2 insertion liquid storage casting ladles 1, rotating speed with 1000r/min stirs the A356 melt, stir 20～30 seconds to the certain whirlpool of melt generation, adding average diameter in the whirlpool center is the SiC ceramic particle of 10nm, SiC ceramic particle mass percent is 1% of total material, continuation was stirred 10 minutes with the rotating speed of 1000r/min, made nano-ceramic particle reach evenly distribution of millimeter level;
(2) aperture offered by the bottom of liquid storage casting ladle 1 is connected with cast casting ladle 5, solution in the liquid storage casting ladle 1 is flowed in the cast casting ladle 5, sensor by liquid-level controller 3 is gathered signal, controls and keep liquid level of solution height in the cast casting ladle 5 in 2/3～3/4 scope of cast casting ladle 5 height;
(3) open the ultrasonic generator 4 of insertion depth for 1/3 place of solution in the cast casting ladle 5, produce the power ultrasonic vibration in solution, frequency is 15kHz, and power is 1kW, makes nano-ceramic particle reach the even distribution of micron order;
(4) solution and solidifies in crystallizer 7 because the gravity effect flows in the crystallizer 7; To the continuous dummy ingot of horizontal direction, obtain the metal-base nanometer composite material that the nano SiC ceramic particle strengthens by dummy bar 8.Its tensile mechanical properties is as follows: tensile strength sigma
b=270MPa, σ
0.2=140MPa, δ=3.0%.
Claims (7)
1. prepare the ultrasonic agitation continuous casing of metal-base nanometer composite material, it is characterized in that: this method adopts following measure:
(1) stirs the metallic solution that is added with nano-ceramic particle in the liquid storage casting ladle, be evenly distributed in the metallic solution to the nano-ceramic particle macroscopic view;
(2) macroscopical metallic solution that is evenly distributed with nano-ceramic particle is imported to the coupled logical cast casting ladle from the liquid storage casting ladle, adopt sensor to gather signal and also pass to liquid-level controller, control and keep cast casting ladle liquid level;
(3) adopt ultrasonic wave to handle the interior metallic solution of cast casting ladle, the nano-ceramic particle to metallic solution is in the even distribution of microcosmic;
(4) by the continuous dummy ingot of dummy bar, the metallic solution in the cast casting ladle continuously flows in the crystallizer and solidifies, and obtains metal-base nanometer composite material.
2. the ultrasonic agitation continuous casing of preparation metal-base nanometer composite material according to claim 1 is characterized in that: described continuous dummy ingot is for continuously downward dummy ingot or continuously to the horizontal direction dummy ingot.
3. the ultrasonic agitation continuous casing of preparation metal-base nanometer composite material according to claim 1 is characterized in that: described stirring is a mechanical agitation.
4. the ultrasonic agitation continuous casing of preparation metal-base nanometer composite material according to claim 1 is characterized in that: described ultrasonic wave is a high-energy ultrasonic.
5. for realizing that aforesaid right requires the device of the ultrasonic agitation continuous casing of 1 described preparation metal-base nanometer composite material, it is characterized in that: this device is the continuous vertical casting device, is made up of liquid storage casting ladle (1), mechanical agitator (2), liquid-level controller (3), supersonic generator (4), cast casting ladle (5), control valve (6), crystallizer (7), dummy bar (8); Connecting relation between them is as follows: liquid storage casting ladle (1) below perforate is connected with cast casting ladle (5); Sensor in the liquid-level controller (3) places in the cast casting ladle (5); Mechanical agitator (2) inserts in the liquid storage casting ladle (1); Supersonic generator (4) places in the cast casting ladle (5); Cast casting ladle (5) below perforate is connected with vertically arranged crystallizer (7), and the dummy bar of dummy ingot (8) vertically is installed on crystallizer (7) lower end continuously, and control valve (6) is positioned at the place that is communicated with of pouring into a mould casting ladle (5) and crystallizer (7).
6. for realizing that aforesaid right requires the device of the ultrasonic agitation continuous casing of 1 described preparation metal-base nanometer composite material, it is characterized in that: this device is a horizontally continuously casting device, is made up of liquid storage casting ladle (1), mechanical agitator (2), liquid-level controller (3), supersonic generator (4), cast casting ladle (5), control valve (6), crystallizer (7), dummy bar (8); Connecting relation between them is as follows: liquid storage casting ladle (1) below perforate is connected with cast casting ladle (5); Sensor in the liquid-level controller (3) places in the cast casting ladle (5); Mechanical agitator (2) inserts in the liquid storage casting ladle (1); Supersonic generator (4) places in the cast casting ladle (5); Cast casting ladle (5) side perforate links to each other with crystallizer (7) one ends that level is installed, and the dummy bar of dummy ingot (8) level is installed on crystallizer (7) other end continuously, and control valve (6) is positioned at the place that is communicated with of pouring into a mould casting ladle (5) and crystallizer (7).
7. according to claim 5 or 6 described devices, it is characterized in that: the sensor in the described liquid-level controller (3) place the cast casting ladle (5) height 2/3～3/4 between.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100414379A CN101612658B (en) | 2009-07-28 | 2009-07-28 | Method and device for preparing metal base nano composite material by ultrasound stirring and continuous casting |
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| CN2009100414379A CN101612658B (en) | 2009-07-28 | 2009-07-28 | Method and device for preparing metal base nano composite material by ultrasound stirring and continuous casting |
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| CN101612658B true CN101612658B (en) | 2011-08-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101792870A (en) * | 2010-04-06 | 2010-08-04 | 清华大学 | Device for continuously preparing composite material melt of metal base nanometer non-metal grain |
| CN102274933B (en) * | 2011-07-22 | 2013-04-17 | 中国科学院金属研究所 | Method for effectively eliminating central defect of solidification blank and refining solidification structure |
| CN103447506B (en) * | 2013-08-27 | 2016-04-20 | 广东工业大学 | Low-melting alloy ultrasonic agitation compound smelting equipment |
| CN104399934B (en) * | 2014-11-04 | 2016-12-07 | 昆明理工大学 | A kind of ceramic-metal composite material preparation facilities and prepare ceramic-metal composite material method |
| CN107116194A (en) * | 2017-05-24 | 2017-09-01 | 东北大学 | A kind of magnesium alloy variable-frequency ultrasound semi-continuous casting equipment |
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