CN103924106A - Preparation method of aluminum praseodymium holmium ternary intermediate alloy - Google Patents
Preparation method of aluminum praseodymium holmium ternary intermediate alloy Download PDFInfo
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Abstract
The invention relates to a preparation method of an aluminum praseodymium holmium ternary intermediate alloy, which comprises the following steps: pre-treating Al-Pt, Al-Ho binary intermediate alloy to the temperature of 251-300 DEG C; adding the Al-Pt binary intermediate alloy in a melting furnace, completely fusing, heating to the temperature of 756-765 DEG C and adding in the Al-Ho binary intermediate alloy; insulating for 41-45 minutes after 750-765 DEG C after the alloy is completely fused, intermittently performing ultrasonic treatment on a melt, wherein the ultrasonic intensity is 1.21kw/cm<2>-1.4kw/cm<2>, the ultrasonic time is 30-34 minutes, application time of high energy ultrasound for each time is 50-60s, and intermittence time is 50-60s; cooling the melt to the temperature of 731-740 DEG C and then refining, removing gas, removing slag, and casting. In the preparation method, pure aluminum is not used, aluminum melting time is omitted, the alloy component is stable, burning loss of rare earth can be effectively avoided, and oxidation inclusion and component segregation are reduced.
Description
Technical field
The invention belongs to metallurgical technology field.
Background technology
Aluminium alloy is as typical light material in metallic substance, compare with ferrous materials, there is high strength, low density, high fracture toughness, thermal expansivity little, and the good characteristic such as high anti-stress-corrosion ability, in machinery, chemical industry, automobile, building, Aeronautics and Astronautics field, be able to widespread use.Concerning aluminium alloy cast ingot, crystal grain thinning can make its interior tissue even, reduces segregation, improves plasticity, prevents the defects such as crackle and shrinkage cavity.In aluminium and aluminium alloy, add appropriate rare earth element, can improve its performance, development novel material.Conventionally rare earth element has very strong chemical mobility of the surface, has alloying, purification, the effect such as rotten.
In the time of in Al-RE aluminium alloy extensively applies to industrial production, its smelting technique has been proposed to new requirement: guaranteeing under the prerequisite of alloy property, with minimum energy, in the shortest time, melt out qualified Al-RE aluminium alloy, both the time of alloy melting and the loss of metallic element had been reduced, save production cost, can accurately control again the composition of alloy.Thereby effectively enhance productivity, reduce and pollute.Because rare earth all has rotten ability in various degree, can generate different intermetallic compounds.Therefore can obtain the intermetallic compound of several raising alloy properties by adding several different rare earths, thereby prepare different aluminium-RE ternary master alloys.Document [Lee Room. the Microstructure and properties research of the rotten secondary aluminium alloy ADC12 of mishmetal. 2011, University Of Nanchang] in reported a kind of method of the Al-La-Ce of preparation ternary master alloy.But this method rare-earth oxidation scaling loss is serious, and the scaling loss amount of La and Ce is respectively 12.21% and 16.87%, and there is component segregation to a certain degree.Therefore the simple method of finding out a kind of Al-RE of preparation ternary master alloy is significant.
People constantly explore the preparation method of aluminium-rare earth intermediate alloy, the production method of preparing at present rare earth aluminium alloy is roughly summarized following two kinds: 1, direct fusion process, be that rare earth or norium are joined in high temperature aluminum liquid by a certain percentage, make master alloy.Be characterized in easy to operate, alloying constituent stable content.Shortcoming is exactly easily to cause alloying constituent segregation, causes local part overrich, disperses the defects such as inhomogeneous.2, fused salt electrolysis process, in electrolytic furnace, usings Repone K, rare earth oxide and rare earth chloride etc. as ionogen, and in aluminium liquid, electrolysis makes aluminium-rare earth intermediate alloy.In industrial aluminum electrolysis bath, directly add rare earth compound, by electrolysis, make aluminium-rare earth intermediate alloy.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 larger.
The present invention introduces high-energy ultrasonic to process on the basis of direct fusion process, utilizes the sound cavitation effect of high-energy ultrasonic and acoustic streaming effect to make the master alloy composition that makes even, and rare earth burn out rate is low, prevents segregation.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of method of aluminium praseodymium holmium ternary master alloy is provided.
The present invention is achieved by the following technical solutions, comprises the following steps:
1, preheating Al-Pt, Al-Ho binary intermediate alloy to 251～300 ℃.Described Al-Pt binary intermediate alloy is Al-(15～20wt.%) Pt, and Al-Ho binary intermediate alloy is Al-(30～40wt.%) Ho;
2, Al-Pt binary intermediate alloy is joined to smelting furnace, fusing completely, adds Al-Ho binary intermediate alloy after increasing the temperature to 756～765 ℃;
3, alloy is incubated 41～45min at 750～765 ℃ after melting completely, then by melt supersound process at intermittence, ultrasound intensity 1.21kw/cm
2～1.4kw/cm
2, ultrasonic time 30～34min, the each application time 50～60s of high-energy ultrasonic, intermittent time 50～60s; Described when ultrasonic ultrasonic head stretch into melt 21～25mm;
4, melt is down to 731～740 ℃, after refining, degasification, slagging-off, pours into a mould, obtain aluminium praseodymium holmium ternary master alloy.Described refining agent is FX-LQ, and add-on is 0.26～0.30% of melt gross weight, action time 12～15min, refining agent is wanted thermal pretreatment, and limit adds refining agent limit and stirs gently melt.The described C that uses
2cl
6degasification, add-on is 0.71～0.8% of melt gross weight, action time 21～25min.
Technique effect of the present invention is: in preparation method of the present invention, do not use fine aluminium, save the melting fine aluminium time.High energy is supersound process alloy intermittently.Method is easy, and alloying constituent is stable, can effectively avoid rare earth scaling loss, reduce oxide inclusion and component segregation, and technique is simple, safe and reliable, easy to operate, three-waste free pollution.
Accompanying drawing explanation
Fig. 1 is Al-15Pt-30Ho ternary master alloy microstructure metallograph prepared by the present invention.
Embodiment
The present invention will be described further by following embodiment, but the specific embodiment of the present invention is not limited to following embodiment.
Embodiment 1: respectively Al-20wt.%Pt, Al-40wt.%Ho are put into crucible and be preheating to 300 ℃.Al-20wt.%Pt binary intermediate alloy is joined to smelting furnace, and fusing completely, adds Al-40wt.%Ho binary intermediate alloy after increasing the temperature to 765 ℃.After melting completely, alloy is incubated 45min at 765 ℃.Under above-mentioned alloy melt liquid level, 25mm place applies intermittently high-energy ultrasonic, ultrasound intensity 1.4kw/cm
2, ultrasonic time 34min, the each application time 60s of high-energy ultrasonic, intermittent time 60s; Melt is down to 740 ℃, adds the 0.30%FX-LQ refining agent refining 15min of melt gross weight, then add 0.8% C of melt gross weight
2cl
6degasification 25min.After slagging-off, cast, obtains Al-20Pt-40Ho ternary master alloy.
Embodiment 2: respectively Al-18wt.%Pt, Al-35wt.%Ho are put into crucible and be preheating to 280 ℃.Al-18wt.%Pt binary intermediate alloy is joined to smelting furnace, and fusing completely, adds Al-35wt.%Ho binary intermediate alloy after increasing the temperature to 760 ℃.After melting completely, alloy is incubated 42min at 750 ℃.Under above-mentioned alloy melt liquid level, 23mm place applies intermittently high-energy ultrasonic, ultrasound intensity 1.3kw/cm
2, ultrasonic time 32min, the each application time 55s of high-energy ultrasonic, intermittent time 55s; Melt is down to 735 ℃, adds the 0.28%FX-LQ refining agent refining 14min of melt gross weight, then add 0.75% C of melt gross weight
2cl
6degasification 22min.After slagging-off, cast, obtains Al-18Pt-35Ho ternary master alloy.
Embodiment 3: respectively Al-15wt.%Pt, Al-30wt.%Ho are put into crucible and be preheating to 251 ℃.Al-15wt.%Pt binary intermediate alloy is joined to smelting furnace, and fusing completely, adds Al-30wt.%Ho binary intermediate alloy after increasing the temperature to 756 ℃.After melting completely, alloy is incubated 41min at 756 ℃.Under above-mentioned alloy melt liquid level, 21mm place applies intermittently high-energy ultrasonic, ultrasound intensity 1.21kw/cm
2, ultrasonic time 30min, the each application time 50s of high-energy ultrasonic, intermittent time 50s; Melt is down to 731 ℃, adds the 0.26%FX-LQ refining agent refining 12min of melt gross weight, then add 0.71% C of melt gross weight
2cl
6degasification 21min.After slagging-off, cast, obtains Al-15Pt-30Ho ternary master alloy.
As shown in Figure 1, the alloy structure for obtaining under embodiment 3 conditions.The Al-15Pt-30Ho ternary master alloy making is carried out to ICP detection, and result shows that in alloy, Pt content is 14.95wt.%, and Ho content is 29.8wt.%.Process is calculated the burn out rate of rare earth Pt, Ho all lower than 5%.As can be seen from the figure,, because hyperacoustic acoustic cavitation harmony fluidisation effect is to the stirring of melt, dissemination, Al-15Pt-30Ho alloy structure is evenly distributed, non-oxidation is mingled with and component segregation phenomenon, and technique is simple, safe and reliable, easy to operate, three-waste free pollution.
In sum, the Al-Pt-Ho ternary master alloy tissue distribution that the present invention obtains is even, and non-oxidation is mingled with and component segregation phenomenon, and technique is simple, safe and reliable, easy to operate, three-waste free pollution.
Claims (5)
1. a preparation method for aluminium praseodymium holmium ternary master alloy, is characterized in that: preheating Al-Pt, Al-Ho binary intermediate alloy to 251～300 ℃; Al-Pt binary intermediate alloy is joined to smelting furnace, and fusing completely, adds Al-Ho binary intermediate alloy after increasing the temperature to 756～765 ℃; After melting completely, alloy is incubated 41～45min at 750～765 ℃, then by melt supersound process at intermittence, ultrasound intensity 1.21kw/cm
2～1.4 kw/cm
2, ultrasonic time 30～34min, the each application time 50～60s of high-energy ultrasonic, intermittent time 50～60s; Melt is down to 731～740 ℃, after refining, degasification, slagging-off, pours into a mould, obtain aluminium praseodymium holmium ternary master alloy.
2. the preparation method of aluminium praseodymium holmium ternary master alloy according to claim 1, is characterized in that, described Al-Pt binary intermediate alloy is Al-(15～20wt.%) Pt, and Al-Ho binary intermediate alloy is Al-(30～40wt.%) Ho.
3. the preparation method of aluminium praseodymium holmium ternary master alloy according to claim 1, is characterized in that, described when ultrasonic ultrasonic head to stretch into melt 21～25mm.
4. the preparation method of aluminium praseodymium holmium ternary master alloy according to claim 1, is characterized in that, described refining agent is FX-LQ, add-on is 0.26～0.30% of melt gross weight, refining agent is wanted thermal pretreatment, action time 12～15min, and limit adds refining agent limit and stirs gently melt.
5. the preparation method of aluminium praseodymium holmium ternary master alloy according to claim 1, is characterized in that the described C that uses
2cl
6degasification, add-on is 0.71～0.8% of melt gross weight, action time 21～25min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104178650A (en) * | 2014-09-01 | 2014-12-03 | 南昌大学 | Preparation method of high-performance praseodymium-holmium-aluminum alloy |
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| CN101591738A (en) * | 2009-07-02 | 2009-12-02 | 上海交通大学 | The preparation method of magnesium-gadolinium-yttrocalcite ternary master alloy |
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| CN103045882A (en) * | 2012-07-17 | 2013-04-17 | 南昌大学 | Method for preparing aluminium praseodymium intermediate alloy in high-energy ultrasonic mode |
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2014
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| JPS63199834A (en) * | 1987-02-13 | 1988-08-18 | Japan Metals & Chem Co Ltd | Manufacture of al-si-base alloy |
| RU2211872C1 (en) * | 2002-07-11 | 2003-09-10 | Махов Сергей Владимирович | Aluminum-scandium master alloy for production of aluminum and magnesium alloys |
| 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 |
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| CN104178650A (en) * | 2014-09-01 | 2014-12-03 | 南昌大学 | Preparation method of high-performance praseodymium-holmium-aluminum alloy |
| CN104178650B (en) * | 2014-09-01 | 2016-11-16 | 南昌大学 | A kind of preparation method of high-performance praseodymium holmium aluminium alloy |
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Effective date of registration: 20200929 Address after: 221000 No.17, Shixin Road, Yangdong village, Shitun sub district office, Tongshan District, Xuzhou City, Jiangsu Province Patentee after: Xuzhou Xinbo metal products Co.,Ltd. Address before: 808, floor 8, building B, business center, gangzhilong science and Technology Park, No. 6, Qinglong Road, Qinghua community, Longhua street, Longhua District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Pengbo Intellectual Property Service Co.,Ltd. Effective date of registration: 20200929 Address after: 808, floor 8, building B, business center, gangzhilong science and Technology Park, No. 6, Qinglong Road, Qinghua community, Longhua street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Pengbo Intellectual Property Service Co.,Ltd. Address before: No. 999 Xuefu Road in Nanchang city Honggutan New District in Jiangxi Province Patentee before: Nanchang University |
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