CN102220504A - Method for preparing aluminum-samarium master alloy by high-intensity ultrasound - Google Patents
Method for preparing aluminum-samarium master alloy by high-intensity ultrasound Download PDFInfo
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- CN102220504A CN102220504A CN2011101624969A CN201110162496A CN102220504A CN 102220504 A CN102220504 A CN 102220504A CN 2011101624969 A CN2011101624969 A CN 2011101624969A CN 201110162496 A CN201110162496 A CN 201110162496A CN 102220504 A CN102220504 A CN 102220504A
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Abstract
The invention discloses a method for preparing an aluminum-samarium master alloy by high-intensity ultrasound. The method includes the steps as follows: firstly placing a pure aluminum ingot into a crucible and heating the pure aluminum ingot to melt; wrapping fine tiny blocky rare earth samarium with aluminum-foil paper and adding the wrapped rare earth samarium into the pure aluminum melt; then keeping temperature for 20-30 minutes for complete melting; and putting an ultrasonic amplitude transformer bar into the melt to conduct ultrasound processing for 10-20 minutes, wherein the power of ultrasound is 400-800W. The technical effects are as follows: the aluminum-samarium master alloy obtained by the method has the advantages of being stable in content, effectively avoiding burning loss of rare earth, reducing oxide inclusion and composition segregation, and the like; in addition, the technology is simple, safe and reliable, and convenient to operate.
Description
Technical field
The present invention relates to a kind of method for preparing aluminium samarium master alloy, relate in particular to a kind of method for preparing aluminium samarium master alloy with high-energy ultrasonic.
Background technology
Rare earth is many in aluminium alloy and other alloy to add with trace element, because rare earth element has very high chemically reactive, and fusing point is higher, easy oxidation and scaling loss under the high temperature.In order to improve the accuracy of aluminium alloy middle-weight rare earths elemental composition, it can be added in the aluminium alloy, under the situation of lower smelting temperature so add in the many forms of aluminium alloy middle-weight rare earths with master alloy.In long term studies, people constantly explore the preparation method of aluminium-rare-earth master alloy, and the production method for preparing rare earth aluminium alloy is at present roughly summarized following two kinds:
Direct fusion process: be that rare earth or norium are joined in the high temperature aluminum liquid by a certain percentage, make master alloy.Be characterized in easy to operate, the alloying constituent stable content.Shortcoming is exactly to cause the alloying constituent segregation easily, causes local composition overrich, disperses defectives such as inhomogeneous.
Fused salt electrolysis process: in electrolytic furnace, as ionogen, electrolysis makes the aluminium-rare-earth master alloy in aluminium liquid with Repone K, rare earth oxide and rare earth chloride etc.In industrial aluminum electrolysis bath, directly add rare earth compound, make the aluminium-rare-earth master alloy by electrolysis.Its advantage is the current efficiency height, and technology is simple, the rare earth yield height.But can produce toxic gas in electrolytic process, contaminate environment is detrimental to health.In addition, alloying constituent is difficult to control, and fluctuation range is bigger.
Summary of the invention
The purpose of this invention is to provide and a kind ofly prepare the method for aluminium samarium master alloy with high-energy ultrasonic, the aluminium samarium master alloy stable content that adopts the present invention to obtain can effectively be avoided the rare earth scaling loss.
The present invention is achieved like this, at first the fine aluminium ingot is put into the crucible internal heating to fusing, with massfraction is that 15% tiny block rare earth samarium wraps up with aluminium-foil paper, join in the above-mentioned fine aluminium melt, in 720 ℃～750 ℃ scopes, be incubated 20～30 minutes then and treat that it fully melts, ultrasonic amplitude transformer stretched into carried out supersound process in the melt 10～20 minutes, ultrasonic power is 400W～800W; Be warmed up to 760 ~ 780 ℃ and be incubated 20 ~ 30 minutes again, ultrasonic agitation is 20～30 minutes again, makes eutectic reaction more uniform and stable, 730 ~ 740 ℃ of insulation 20min then, refining removal of impurities, 700 ~ 720 ℃ of casting, sampling.
Technique effect of the present invention is: the aluminium samarium master alloy stable content that adopts the present invention to obtain, can effectively avoid the rare earth scaling loss, and reduce advantages such as oxide inclusion and component segregation, and technology is simple, safe and reliable, easy to operate.
Description of drawings
Fig. 1 is the Al-Sm master alloy microstructure of the present invention's preparation.
Embodiment
The Al-Sm master alloy:
Embodiment 1: at first the fine aluminium ingot is put into the crucible internal heating to fusing, with massfraction is that 15% tiny block rare earth samarium (purity of Sm is 99.9%) wraps up with aluminium-foil paper, join in the above-mentioned fine aluminium melt, insulation treated that it fully melted in 30 minutes in 720 ℃ of scopes then.Ultrasonic amplitude transformer stretched into carried out supersound process in the melt 10 minutes, ultrasonic power is 600W; Be warmed up to 760 ℃ and be incubated 30 minutes again, ultrasonic agitation is 20 minutes again, makes eutectic reaction more uniform and stable.730 ℃ of insulation 20min 700 ℃ of following refining removal of impurities, cast and take a sample then.
Embodiment 2: at first the fine aluminium ingot being put into the crucible internal heating to fusing, is that 15% tiny block rare earth samarium (purity of Sm is 99.9%) wraps up with aluminium-foil paper with massfraction, joins in the above-mentioned fine aluminium melt, is incubated 25 minutes down at 740 ℃ then.Ultrasonic amplitude transformer stretched into carried out supersound process in the melt 15 minutes, ultrasonic power is 600W; Be warmed up to 770 ℃ and be incubated 25 minutes again, ultrasonic agitation is 25 minutes again, makes eutectic reaction more uniform and stable.740 ℃ of insulation 20min 710 ℃ of following refining removal of impurities, cast and take a sample then.
Embodiment 3: at first the fine aluminium ingot being put into the crucible internal heating to fusing, is that 15% tiny block rare earth samarium (purity of Sm is 99.9%) wraps up with aluminium-foil paper with massfraction, joins in the above-mentioned fine aluminium melt, is incubated 30 minutes down at 750 ℃ then.Ultrasonic amplitude transformer stretched into carried out supersound process in the melt 10 minutes, ultrasonic power is 600W; Be warmed up to 780 ℃ and be incubated 30 minutes again, ultrasonic agitation is 30 minutes again, makes eutectic reaction more uniform and stable.740 ℃ of insulation 20min 720 ℃ of following refining removal of impurities, cast and take a sample then.
As shown in Figure 1, what eutectic structure distributed in the Al-Sm master alloy tissue that obtains under embodiment 2 conditions is very even, and shape is rounding very also.When ultrasonic wave imports alloy melt, many non-linear effects will appear in the propagation of sound wave, wherein mainly show as cavitation and acoustic streaming effect, the local heating effect of whole heating, boundary in stirring, dispersion, impact fracture and the calorifics effect in the mechanics effect that cavitation and acoustic streaming are caused, significantly improve the wettability of samarium in the fine aluminium liquation, make to be dispersed in uniformly in the aluminum solutions, eliminate component segregation, reduce oxide inclusion through the samarium in the aluminium samarium master alloy of high-energy ultrasonic processing.The adding of samarium is wrapped up with aluminium-foil paper in experimentation, can effectively avoid the oxidation and the scaling loss of rare earth.Thereby prepared aluminium samarium master alloy stable components, oxide inclusion and component segregation are few.
In sum, also can be as seen from the figure, adopt in the tissue of the Al-Sm master alloy that the present invention obtains the eutectic structure rounding and be evenly distributed, and technology is simple, safe and reliable, easy to operate.
Claims (1)
1. method for preparing aluminium samarium master alloy with high-energy ultrasonic, it is characterized in that the preparation method is: at first the fine aluminium ingot is put into the crucible internal heating to fusing, with massfraction is that 15% tiny block rare earth samarium wraps up with aluminium-foil paper, join in the above-mentioned fine aluminium melt, in 720 ℃～750 ℃ scopes, be incubated 20～30 minutes then and treat that it fully melts, ultrasonic amplitude transformer stretched into carried out supersound process in the melt 10～20 minutes, ultrasonic power is 400W～800W; Be warmed up to 760 ~ 780 ℃ and be incubated 20 ~ 30 minutes again, ultrasonic agitation is 20～30 minutes again, makes eutectic reaction more uniform and stable, 730 ~ 740 ℃ of insulation 20min then, refining removal of impurities, 700 ~ 720 ℃ of casting, sampling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101624969A CN102220504A (en) | 2011-06-16 | 2011-06-16 | Method for preparing aluminum-samarium master alloy by high-intensity ultrasound |
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| CN2011101624969A CN102220504A (en) | 2011-06-16 | 2011-06-16 | Method for preparing aluminum-samarium master alloy by high-intensity ultrasound |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004931A (en) * | 2014-03-21 | 2014-08-27 | 南昌大学 | Preparation method of ternary master alloy of aluminum, cerium and yttrium |
| CN105950928A (en) * | 2016-05-20 | 2016-09-21 | 北京新能源汽车股份有限公司 | Magnesium alloy for motor shell of new energy vehicle and preparation method and application thereof |
| CN110004332A (en) * | 2019-05-23 | 2019-07-12 | 河北工业大学 | Al3Sc-Al3The preparation method of Zr/Al composite material inovulant |
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| CN101724769A (en) * | 2008-10-13 | 2010-06-09 | 北京有色金属研究总院 | Rare earth aluminum alloy, and method and device for preparing same |
| CN101886197A (en) * | 2010-07-09 | 2010-11-17 | 哈尔滨工程大学 | Aluminum-lithium-samarium alloy and fused salt electrolysis preparation method thereof |
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2011
- 2011-06-16 CN CN2011101624969A patent/CN102220504A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101724769A (en) * | 2008-10-13 | 2010-06-09 | 北京有色金属研究总院 | Rare earth aluminum alloy, and method and device for preparing same |
| CN101886197A (en) * | 2010-07-09 | 2010-11-17 | 哈尔滨工程大学 | Aluminum-lithium-samarium alloy and fused salt electrolysis preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004931A (en) * | 2014-03-21 | 2014-08-27 | 南昌大学 | Preparation method of ternary master alloy of aluminum, cerium and yttrium |
| CN105950928A (en) * | 2016-05-20 | 2016-09-21 | 北京新能源汽车股份有限公司 | Magnesium alloy for motor shell of new energy vehicle and preparation method and application thereof |
| CN110004332A (en) * | 2019-05-23 | 2019-07-12 | 河北工业大学 | Al3Sc-Al3The preparation method of Zr/Al composite material inovulant |
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Application publication date: 20111019 |