CN102776400A - Method for preparing aluminum gadolinium intermediate alloy by using high intensity ultrasonic - Google Patents
Method for preparing aluminum gadolinium intermediate alloy by using high intensity ultrasonic Download PDFInfo
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- CN102776400A CN102776400A CN2012102464321A CN201210246432A CN102776400A CN 102776400 A CN102776400 A CN 102776400A CN 2012102464321 A CN2012102464321 A CN 2012102464321A CN 201210246432 A CN201210246432 A CN 201210246432A CN 102776400 A CN102776400 A CN 102776400A
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Abstract
The invention discloses a method for preparing an aluminum gadolinium intermediate alloy by using high intensity ultrasonic. The method comprises the following steps of: (1) packing rare earth gadolinium particles by using aluminum-foil paper, pressing the rare earth gadolinium particles into a pure magnesium melt at the temperature of between 745 and 765 DEG C, and keeping the temperature for 20 to 30 minutes, wherein the content of rare earth gadolinium is 23 percent of the total weight; (2) applying intermittent high intensity ultrasonic at 10-15mm below the liquid level of the alloy melt, wherein the ultrasonic intensity is 0.6 to 0.8 kw/cm<2>, the ultrasound application duration is 8 to 15 minutes, the application time of the high intensity ultrasonic every time is 30 to 50 seconds, and the intermittent time is 30 to 50 seconds; and (3) cooling the alloy melt to the temperature of between 700 and 710 DEG C, refining, removing impurities and casting. The rare earth burning loss can be effectively avoided, the rare earth content is stable, the energy consumption is reduced, the segregation is reduced, and the aluminum gadolinium intermediate alloy is simple in process, safe, reliable, convenient to operate and uniform in alloy component.
Description
Technical field
The present invention relates to a kind of preparation method of metal alloy, relate in particular to the method that a kind of high-energy ultrasonic prepares aluminium gadolinium master alloy.
Background technology
The aluminium rare earth intermediate alloy is a kind of fining modifier efficiently, has good refinement modification effect, is widely used in rotten processing of refinement of aluminium and alloy thereof, and significantly the refinement alloy structure improves alloy mechanical property.In long term studies; People constantly explore the preparation method of aluminium-rare-earth master alloy; At present the working method of preparation rare earth aluminium alloy is roughly summarized has following two kinds: the first, 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; The second, 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 through electrolysis.But in electrolytic process, can produce toxic gas, contaminate environment is detrimental to health.In addition, alloying constituent is difficult to control, and fluctuation range is bigger.The present invention introduces high-energy ultrasonic to handle on the basis of direct fusion process, utilize the sound cavitation effect of high-energy ultrasonic and acoustic streaming effect to make the master alloy composition that makes even, prevents segregation.
Summary of the invention
The object of the present invention is to provide a kind of high-energy ultrasonic to prepare the method for aluminium gadolinium master alloy, its prepared aluminium gadolinium master alloy content of rare earth is stable, alloying constituent is even, and the preparation process is simple, cost is low.
The present invention realizes like this; A kind of high-energy ultrasonic prepares the method for aluminium gadolinium master alloy; It is characterized in that said method comprising the steps of: at first wrap up the rare earth gadolinium (1) with aluminium-foil paper; Be pressed into temperature and be in 745 ℃～765 ℃ the fine aluminium melt, be incubated 20～30 minutes, its middle-weight rare earths gadolinium concentrations is 23% of a gross weight; (2) the 10-15mm place applies the intermittent type high-energy ultrasonic under above-mentioned alloy melt liquid level, and ultrasound intensity is 0.6kw/cm
2～0.8kw/cm
2(3) ultrasonic to apply the time length be 8～15min, the each application time of high-energy ultrasonic 30～50 seconds, 30～50 seconds quiescent intervals; (4) then alloy melt is reduced to 700 ℃ ~ 710 ℃, the refining removal of impurities is also poured into a mould; Said rare earth gadolinium is a particulate state or Powdered; Said rare earth gadolinium particulate diameter is 20-100um; The purity of described rare earth gadolinium is 99.9%.
Technique effect of the present invention is: the present invention so smelting temperature is lower, can effectively avoid the rare earth scaling loss because the employing alloying constituent is an eutectic composition, thereby content of rare earth is stable, and cuts down the consumption of energy.And technology is simple, safe and reliable, easy to operate, and no obnoxious flavour produces.The employing high-energy ultrasonic is handled, and guarantees that alloying constituent is even, reduces segregation.
Description of drawings
Fig. 1 is the aluminium gadolinium master alloy microstructure metallograph of the present invention's preparation.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is done further elaboration;
Embodiment 1: at first with Powdered rare earth gadolinium (purity of Gd is 99.9%) with aluminium-foil paper parcel, be pressed into temperature and be in 745 ℃ the fine aluminium melt, its middle-weight rare earths gadolinium concentrations accounts for 23% of gross weight, is incubated 20 minutes.The 10mm place applies the intermittent type high-energy ultrasonic under above-mentioned alloy melt liquid level then, and ultrasound intensity is 0.6kw/cm
2, application time is 8min, the each application time of high-energy ultrasonic 30 seconds, is reduced to 700 ℃ of refining removal of impurities with alloy melt then and is poured into a mould at 30 seconds quiescent intervals.
Embodiment 2: at first with Powdered rare earth gadolinium (purity of Gd is 99.9%) with aluminium-foil paper parcel, be pressed into temperature and be in 755 ℃ the fine aluminium melt, its middle-weight rare earths gadolinium concentrations accounts for 23% of gross weight, is incubated 25 minutes.The 15mm place applies the intermittent type high-energy ultrasonic under above-mentioned alloy melt liquid level then, and ultrasound intensity is 0.8kw/cm
2, application time is 12min, the each application time of high-energy ultrasonic 40 seconds, is reduced to 710 ℃ of refining removal of impurities with alloy melt then and is poured into a mould at 40 seconds quiescent intervals.
Embodiment 3: at first with particulate state rare earth gadolinium (purity of Gd is 99.9%) with aluminium-foil paper parcel, rare earth gadolinium particulate diameter is 20-100um, is pressed into temperature and is in 765 ℃ the fine aluminium melt, its middle-weight rare earths gadolinium concentrations accounts for 23% of gross weight, is incubated 20 minutes.The 15mm place applies the intermittent type high-energy ultrasonic under above-mentioned alloy melt liquid level then, and ultrasound intensity is 0.8kw/cm
2, application time is 15min, the each application time of high-energy ultrasonic 50 seconds, is reduced to 710 ℃ of refining removal of impurities with alloy melt then and is poured into a mould at 50 seconds quiescent intervals.
Shown in accompanying drawing 1, the aluminium gadolinium master alloy that under embodiment 2 conditions, obtains is organized metallograph, and as can be seen from the figure the eutectic structure distribution is very even.When UW 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 significantly improves the wettability of gadolinium in the fine aluminium liquation in stirring, dispersion, impact fracture and the calorifics effect in the mechanics effect that cavitation and acoustic streaming are caused; Make to be dispersed in uniformly in the aluminum solutions, eliminate component segregation through the gadolinium in the aluminium gadolinium master alloy of high-energy ultrasonic processing.Adopt the intermittent type high-energy ultrasonic to handle and effectively to control speed of reaction, further make alloying constituent even, also can reduce the oxidization burning loss in the reaction process.Thereby prepared aluminium gadolinium master alloy stable components, oxide inclusion and component segregation are few.
In sum, also can from accompanying drawing, find out, adopt in the tissue of the aluminium gadolinium master alloy that the present invention obtains eutectic structure tiny and be evenly distributed, and technology be simple, safe and reliable, easy to operate.
Claims (4)
1. a high-energy ultrasonic prepares the method for aluminium gadolinium master alloy; It is characterized in that said method comprising the steps of: at first wrap up the rare earth gadolinium (1) with aluminium-foil paper; Be pressed into temperature and be in 745 ℃～765 ℃ the fine aluminium melt; Be incubated 20～30 minutes, its middle-weight rare earths gadolinium concentrations is 23% of a gross weight; (2) the 10-15mm place applies the intermittent type high-energy ultrasonic under above-mentioned alloy melt liquid level, and ultrasound intensity is 0.6kw/cm
2～0.8kw/cm
2(3) ultrasonic to apply the time length be 8～15min, the each application time of high-energy ultrasonic 30～50 seconds, 30～50 seconds quiescent intervals; (4) then alloy melt is reduced to 700 ℃ ~ 710 ℃, the refining removal of impurities is also poured into a mould.
2. as claimed in claim 1ly a kind ofly prepare the method for aluminium gadolinium master alloy, it is characterized in that said rare earth gadolinium is a particulate state or Powdered with high-energy ultrasonic.
3. as claimed in claim 2ly a kind ofly prepare the method for aluminium gadolinium master alloy, it is characterized in that said rare earth gadolinium particulate diameter is 20-100um with high-energy ultrasonic.
4. prepare the method for aluminium gadolinium master alloy like each described a kind of high-energy ultrasonic of claim 1 to 3, the purity that it is characterized in that described rare earth gadolinium is 99.9%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469028A (en) * | 2013-08-16 | 2013-12-25 | 南昌大学 | Rare earth element praseodymium alloyed aluminum-silicon alloy and preparation method thereof |
| RU2639165C1 (en) * | 2016-11-29 | 2017-12-20 | Федеральное государственное автономное образовательное учреждение высшего образования "Уральский федеральный университет имени первого Президента России Б.Н. Ельцина" | Method for obtaining aluminium - gadolinium alloy |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134667A (en) * | 2011-02-28 | 2011-07-27 | 江苏中欧材料研究院有限公司 | Preparation method of submicron particle-reinforced aluminum-based composite material |
| CN102220505A (en) * | 2011-06-16 | 2011-10-19 | 南昌大学 | Method for preparing magnesium-lanthanum master alloy by high-intensity ultrasound |
| CN102220523A (en) * | 2011-06-12 | 2011-10-19 | 南昌大学 | Method for preparing aluminum-lanthanum intermediate alloy by using high-intensity ultrasound |
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2012
- 2012-07-17 CN CN2012102464321A patent/CN102776400A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134667A (en) * | 2011-02-28 | 2011-07-27 | 江苏中欧材料研究院有限公司 | Preparation method of submicron particle-reinforced aluminum-based composite material |
| CN102220523A (en) * | 2011-06-12 | 2011-10-19 | 南昌大学 | Method for preparing aluminum-lanthanum intermediate alloy by using high-intensity ultrasound |
| CN102220505A (en) * | 2011-06-16 | 2011-10-19 | 南昌大学 | Method for preparing magnesium-lanthanum master alloy by high-intensity ultrasound |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469028A (en) * | 2013-08-16 | 2013-12-25 | 南昌大学 | Rare earth element praseodymium alloyed aluminum-silicon alloy and preparation method thereof |
| CN103469028B (en) * | 2013-08-16 | 2015-04-15 | 南昌大学 | Rare earth element praseodymium alloyed aluminum-silicon alloy and preparation method thereof |
| RU2639165C1 (en) * | 2016-11-29 | 2017-12-20 | Федеральное государственное автономное образовательное учреждение высшего образования "Уральский федеральный университет имени первого Президента России Б.Н. Ельцина" | Method for obtaining aluminium - gadolinium alloy |
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Application publication date: 20121114 |