CN105821260B - The aluminium, Seandium, zirconium intermediate alloy and its production method of a kind of aluminium alloy - Google Patents
The aluminium, Seandium, zirconium intermediate alloy and its production method of a kind of aluminium alloy Download PDFInfo
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- CN105821260B CN105821260B CN201610341298.1A CN201610341298A CN105821260B CN 105821260 B CN105821260 B CN 105821260B CN 201610341298 A CN201610341298 A CN 201610341298A CN 105821260 B CN105821260 B CN 105821260B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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Abstract
The invention discloses the aluminium, Seandium, zirconium intermediate alloy and its production method of a kind of aluminium alloy, the aluminium, Seandium, zirconium intermediate alloy quality group turns into：The Zr of the Sc of 2wt% and 1 2wt%, balance of Al.The beneficial effects of the invention are as follows the aluminium, Seandium, zirconium intermediate alloy can replace scandium bearing master alloy, reduce production cost, and after adding aluminium, Seandium, zirconium intermediate alloy in aluminium alloy, reinforcing effect is more preferable.
Description
Technical field
The present invention relates to the aluminium, Seandium, zirconium intermediate alloy and its production method of a kind of aluminium alloy, belong to aluminum alloy materials manufacture
Field.
Background technology
To introduce other metal materials in aluminium alloy casting, conventional feed postition is intermediate alloy, and such as Al-10RE should
Intermediate alloy is used to mixing method production, there are many dystectic compounds in product, and composition is easily caused during use not
Uniformly.Addition 0.2-0.6%, same Zr of the rare earth in aluminium alloy in 0.01-0.2%, Ti between 0.005-0.1, mistake
At most it is harmful to.But rare earth metal is active, and easy scaling loss has that effect cuts in and out, unstable, its effect is with the side of addition
Formula, technology controlling and process have great relation.
It is well known that Sc is a kind of best Al alloy modifications element, in light-high-strength aluminium alloy 7075, addition scandium can
Significantly improve strength of alloy, weld, corrosion resisting property.Because the price of scandium is high, substantial amounts of use causes cost increase.
The content of the invention
Present invention solves the technical problem that being the use for reducing scandium in aluminium alloy manufacturing process, finding one kind can part
Instead of the alterant element of scandium forming intermediate alloy.
The technical scheme is that, there is provided a kind of aluminium, Seandium, zirconium intermediate alloy of aluminium alloy, closes in the middle of the aluminium, Seandium, zirconium
The Zr, balance of Al of Sc and 1-2wt% of the gold containing 2wt%.
Further, the present invention provides a kind of production method of the aluminium, Seandium, zirconium intermediate alloy, comprises the following steps：
It is 1 by mass ratio：The fine aluminium and composite modifier of (0.1-0.3) are heated to fusing in being put into stove, then in 850-
20-60 minutes is incubated at 900 DEG C；Scum silica frost is poured out, molten metal cooling obtains aluminium, Seandium, zirconium intermediate alloy；
The quality group of each composition turns into the composite modifier：10-17%Sc2O3, 5-15%ZrO2, 4-8%NaF,
25-36%KCl, 37-45%NH4F, 2-7%CaCl2。
Further, the fine aluminium is aluminium of the purity more than 99.8%.
Because scandium price is high, while adding scandium, zirconium is added, part Sc is substituted with Zr.Research is found in the same of addition Sc
When, add Zr its combination property to be not less than individually plus scandium, while the dosage of scandium can be reduced, reduces cost is conducive to industry commercially
Change.Research shows that zirconium substitutes scandium 30-50%, and preferably, excessive zirconium can form thick Al to effect3Zr phases, reduce zirconium effect.
The content that scandium zirconium is added in aluminum alloy materials is no more than 0.3% respectively, if total constituent content exceedes element adds the upper limit,
Thick nascent Al can be formed3(ScZr) phase, reduces reinforcing effect.Scandium zirconium is added in aluminium alloy, Al can be formed3(ScZr)
Particle, the particle turns into equiax crystal, crystal grain thinning, and suppresses recovery and recrystallization generation, reinforced alloys.Al3(ScZr) it is
Spherical shell structure, ball richness scandium, outer layer richness zirconium, compared to scandium atom, zirconium atom has lower diffusion coefficient, therefore, Al3(ScZr)
Particle compares Al3Sc particles are more stable.In AlZnMgCu high-strength alloys, under high-strength light-weighted requirement, 0.2% is added
Sc, 0.1%Zr can be lifted to 700Mpa tensile strength from 500Mpa.Recrystallization intensification T rises to 550 DEG C from 400 DEG C.Material
The elevated temperature strength that material has kept, aluminium substitutes steel and is possibly realized.The alloy material is in fields such as Aero-Space, bullet train, automobiles
It is used widely.These material alloys all using Sc and addition Zr, constitute ScZr alloy complex intensifyings.Add AlScZr alloys
Compared with Al-2Sc and Al-10Zr is individually added into, the inhomogeneities of composition can be reduced, and advantageously reduce production cost.This hair
Al-2Sc- (1-2) Zr alloys that open-birth is produced have following features,
Due to using (ScZr)2O3Mixture, from the scandium oxide that the acid solution of zirconium oxychloride production is extracted, without separating wherein
Impurity zirconium, raw material do not need high-purity Sc2O3.And existing AlSc productions use High-purity Sc Oxide, AlZr productions are used
K2, there is price defect high in ZrF6.
Production method makes compound additive using the pre-reaction of fused salt elder generation, then by aluminium reducing (ScZr) F3, produce Al-
2Sc- (1-2) Zr alloys.Solubility of the ScZr in aluminium alloy is small, when content is high, easily causes segregation, and the present invention is due to using
Water cooled mo(u)ld accelerated solidification, the Al of generation3(Sc+Zr) it is mutually tiny, uniform.Reinforcing effect is added in aluminium alloy more preferably, is overcome
The product grains of other non-rapid solidification production Al-2Sc, Al-10Zr are thick, and spindle uneven components, difference on effect lack greatly
Point.
Alloy production uses graphite crucible, antivacuum stove, and fusion temperature T=660~900 DEG C are incubated T=850~900
DEG C, soaking time 0.5h stirs, and reacts as follows：ZrF4+4Al→Al3Zr+AlF3；ScF3+Al→Al2Sc3+AlF.Reduction
Sc out, Zr enter in Al solution；Scum silica frost is poured out, water-cooled swage ingot casting is obtained in the middle of the binary containing Al-2Sc- (1-2) Zr
Alloy.The yield of Sc, Zr is 90%.
Produced using composite modifier and aluminum reduction method, adjust different molten salt composition proportionings, improved (ScZr)2O3In fused salt
In solubility, mobility, fused salt fusing point, so as to reduce reduction temperature to 850-900 degree, metal yield more than 90%.
The beneficial effects of the invention are as follows the aluminium, Seandium, zirconium intermediate alloy can replace scandium bearing master alloy, reduce and be produced into
This, after adding aluminium, Seandium, zirconium intermediate alloy in aluminium alloy, reinforcing effect is more preferable.
Specific embodiment
Special instruction：The present invention is easy for expression, using row method for expressing commonly used in the trade.Percentage is quality percentage
Number, in the expression formula of alloy, numeral represents that corresponding composition accounts for the mass percent of alloy, the expression tie element of no numeral
Concrete content is unknown, and "-" represents list separator, has no practical significance；Such as Al-2Sc-1Zr, 2% Sc is contained in expression aluminium alloy
Zr with 1%；Al-2Sc- (1-2) Zr represents the Zr of Sc and 1-2wt% containing 2wt% in aluminium alloy.Application by analogy.
Embodiment 1
The production method of Al-2Sc-1Zr intermediate alloys and its aluminium alloy, comprises the following steps：
1. raw material uses 45kgSc2O3(contain 5kgZrO2), 13kgZrO2, 15kgNaF, 80kgKCl, 100kgNH4F,
13kgCaCl2.Above-mentioned material is first mixed in plastic tub, is then placed in black-fead crucible.Fusing stove heat, on a T=300 DEG C of left side
It is right to stop 30 points, 500 DEG C are then warming up to again, 30 points are incubated, stir, in injection swage, room temperature is cooled to, it is combined
Alterant 174kg.
2. upper composite modifier and 1200kgAl are together put into graphite crucible, Al/ composite modifier=1:0.145.
Electro-smelting, T=800 DEG C of fusion temperature is incubated T=850 DEG C, is incubated time zone 1h, stirs.
3. scum silica frost is poured out, and water-cooled swage ingot casting obtains the Al intermediate alloys 1228kg containing 2%Sc, 1%Zr.
4. add in AlZnMg alloys, prepare AlZnMg-0.2Sc-0.1Zr alloys, performance is shown in Table 1
Embodiment 2
The production method of Al-2Sc-2Zr intermediate alloys and its aluminium alloy, comprises the following steps：,
1. raw material uses 42kgSc2O3(contain 2kgZrO2), 34kgZrO2, 22kgNaF, 100kgKCl, 145kgNH4F,
17kgCaCl2.Above-mentioned material is first mixed in plastic tub, is then placed in black-fead crucible.Fusing stove heat, on a T=200 DEG C of left side
Right stop 1h, is then warming up to 600 DEG C again, is incubated 30 minutes, stirs, and in injection swage, is cooled to room temperature, is combined
Alterant 220kg.
2. above-mentioned composite modifier and 1200kgAl are together put into graphite crucible, Al/ composite modifier=1:0.18.
Electro-smelting, T=800 DEG C of fusion temperature is incubated T=900 DEG C, is incubated time zone 0.5h, stirs,
3. scum silica frost is poured out, and water-cooled swage ingot casting obtains the Al intermediate alloys 1236kg containing 2%Sc, 2%Zr.
4. add in AlZnMg alloys, prepare AlZnMg-0.1Sc-0.1Zr alloys, performance is shown in Table 1.
Comparative example
The production method of Al-2Sc intermediate alloys and its aluminium alloy, comprises the following steps：
1. raw material uses 40kgSc2O3, 15kgNaF, 60kgKCl, 80kgNH4F, 15kgCaCl2.By above-mentioned material first in modeling
Mix in feed basin, be then placed in black-fead crucible.Fusing stove heat, 2h is stopped at T=300 DEG C or so, and 600 are then warming up to again
DEG C, 60 minutes are incubated, stir, in injection swage, room temperature is cooled to, obtain composite modifier 150kg.
2. above-mentioned composite modifier and 1000kgAl are together put into graphite crucible, Al/ composite modifier=1:0.15.
Electro-smelting, T=800 DEG C of fusion temperature is incubated T=900 DEG C, is incubated time zone 0.5h, stirs
3. scum silica frost is poured out, and water-cooled swage ingot casting obtains the scandium bearing master alloy 1020kg containing 2%Sc.
4. add in AlZnMg alloys, the alloy property obtained by AlZnMg-0.2Sc is shown in Table 1.
Table 1
Claims (2)
1. a kind of production method of aluminium, Seandium, zirconium intermediate alloy, the quality group of the aluminium, Seandium, zirconium intermediate alloy turns into：The Sc of 2wt% and
The Zr of 1-2wt%, balance of Al;It is characterised in that it includes following steps：
It is 1 by mass ratio：（0.1-0.3）Fine aluminium and composite modifier be put into stove and be heated to fusing, then at 850-900 DEG C
Lower insulation 20-60 minutes；Scum silica frost is poured out, molten metal cooling obtains aluminium, Seandium, zirconium intermediate alloy；
The quality group of each composition turns into the composite modifier：
Sc2O3 10-17%
ZrO2 5-15%
NaF 4-8%
KCl 25-36%
NH4F 37-45%
CaCl2 2-7%。
2. production method as claimed in claim 1, it is characterised in that the fine aluminium is aluminium of the purity more than 99.8%.
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| CN107794419B (en) * | 2017-06-13 | 2020-03-31 | 湖南东方钪业股份有限公司 | Multi-element intermediate alloy for aluminum alloy and preparation method thereof |
| CN110004332B (en) * | 2019-05-23 | 2020-09-08 | 河北工业大学 | Al3Sc-Al3Zr/Al composite material inoculant |
| CN110129596B (en) * | 2019-05-23 | 2020-07-14 | 河北工业大学 | Thin strip-shaped nano Al3Preparation method of (Sc, Zr)/Al composite inoculant |
| CN110423921A (en) * | 2019-09-12 | 2019-11-08 | 中国恩菲工程技术有限公司 | A kind of ScAl3/ Al base composite inoculant, preparation method and application |
| CN111363934B (en) * | 2020-04-08 | 2021-06-22 | 中国恩菲工程技术有限公司 | Magnesium-scandium alloy and preparation method thereof |
| CN112746191A (en) * | 2020-12-30 | 2021-05-04 | 贵州华科铝材料工程技术研究有限公司 | Preparation method of mixed Sc-Zr aluminum alloy |
| CN115896551B (en) * | 2022-11-17 | 2024-02-20 | 山东省科学院新材料研究所 | Aluminum scandium zirconium intermediate alloy and preparation method thereof |
| CN115990669B (en) * | 2023-03-24 | 2023-06-27 | 湖南东方钪业股份有限公司 | Scandium-aluminum alloy powder for additive manufacturing and preparation method thereof |
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| CN100427618C (en) * | 2005-05-19 | 2008-10-22 | 昆明理工大学 | Process for preparing aluminium-scandium intermediate alloy from scandium-containing mineral by one-step method |
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