CN107794419A - A kind of aluminium alloy polynary intermediate alloy and preparation method thereof - Google Patents
A kind of aluminium alloy polynary intermediate alloy and preparation method thereof Download PDFInfo
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- CN107794419A CN107794419A CN201710440741.5A CN201710440741A CN107794419A CN 107794419 A CN107794419 A CN 107794419A CN 201710440741 A CN201710440741 A CN 201710440741A CN 107794419 A CN107794419 A CN 107794419A
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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
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
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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 a kind of aluminium alloy polynary intermediate alloy and preparation method thereof, the polynary intermediate alloy quality group turns into Mg 2~6%, Mn 0.2~0.8%, Sc 0.08~0.8%, Zr 0.08~0.4%, surplus Al；Alloy prepares and uses fused salt thermit reduction.The present invention largely reduces the content of scandium zirconium in intermediate alloy, improves scandium zirconium reduction recovery rate, reduces the production cost of Mo-bearing granitoid；It is aided with that magnesium is manganese strengthened simultaneously, the combination property of polynary intermediate alloy of the invention is good, has and strengthens modification effect well.
Description
Technical field
The present invention relates to a kind of aluminium alloy polynary intermediate alloy and preparation method thereof, belong to technical field of aluminum alloy technology.
Background technology
The lightweight of Aero-Space, high ferro and automobile, greatly promotes the development of wrought aluminium alloy, and high-strength light aluminium alloy obtains
Obtain extensive use.In the production of wrought aluminium alloy material, addition metal scandium can be obviously improved the performance of aluminium alloy, therefore promote
Application of the scandium in aluminium alloy is entered.
Expensive due to scandium, a large amount of additions of scandium can cause the cost increase of aluminium alloy, therefore on the one hand need to seek
Seek the alloying element instead of metal scandium.Chinese invention patent discloses aluminium, Seandium, zirconium intermediate alloy and its production of a kind of aluminium alloy
Method (application number：2016103412981) it is, to replace part scandium with zirconium, performance is improved by scandium, zirconium.
The feed postition of other alloying elements such as scandium zirconium adds generally in the form of intermediate alloy, as Al-Sc (Sc 2%),
Al-Zr (Zr 5%) intermediate alloy, scandium and zirconium are the strong metamorphism elements of aluminium alloy, and wherein scandium is best alterant element,
But cost is high.In 5 systems (Al-Mg) and 7 systems (Al-Mg-Zn) aluminium alloy, substitute scandium, the compound addition of scandium zirconium with Partial Elements zirconium
Change agent effect is good, cost is excellent.Scandium zirconium can significantly improve yield strength, welding performance, corrosion resisting property and the processability of alloy
Energy.On the other hand it is the cost for reducing scandium bearing master alloy.
In Al-Sc (2%) intermediate alloy actual production process, using fused salt aluminum reduction method, for contents of scandium alloy,
Scandium is higher, is limited by this method, and the difficulty of production is bigger, in order to reach 2%Sc contents, it is necessary to increase scandium oxide input amount, lead
The increase of Al-Sc (2%) production cost is caused, reduces that Sc recovery is low, and component segregation is big that (solid solubility of the scandium in aluminium is low, produces
Segregation), and the problem of zirconium uneven components, deviation is big similarly be present in Al-Zr (5%).
The content of the invention
Present invention deficiency for more than, further reduces the content of scandium zirconium, production process is more in the production of intermediate alloy
Be easily controlled, component segregation is small, while keep scandium zirconium high reduction yield (>95%) production cost, is reduced, while adds magnesium manganese
Reinforced alloys, keep intermediate alloy that there is rotten well strengthen function.
The technical scheme is that, there is provided a kind of polynary intermediate alloy of aluminium alloy, the polynary intermediate alloy quality
Form as Mg 2~6%, Mn 0.2~0.8%, Sc 0.08~0.8%, Zr 0.08~0.4%, surplus Al.
Sc content is preferably 0.4~0.8%；More preferably 0.7~0.8%.
The preparation method of above-mentioned polynary intermediate alloy, comprises the following steps：
(1) it is 100 by mass ratio：1~7 pure Al and fused salt is put into smelting furnace, is heated to melting, and 850~980
At DEG C, 0.5-1 hours are incubated；
(2) 720~760 DEG C, metal Mn and Mg are cooled to, is incubated 10-20 minutes, stirring homogenizes alloy；
(3) aluminium liquid surface fused salt is removed, and argon gas is passed through in aluminium liquid, degasification, after standing, is skimmed；
(4) alloy molten solution is obtained into polynary intermediate alloy with water cooled mo(u)ld ingot casting.
Preferably, in step (4), 700~730 DEG C of the temperature of ingot casting is controlled.
Preferably, the smelting furnace is non-vacuum melting stove.
Preferably, the quality group of each composition turns into the fused salt：
Preferably, in step (3), the time of standing is 5~10 minutes.
Preferably, in step (2), metal Mn is first added, adds metal Mg.The magnesium residence time can so be shortened, subtracted
The scaling loss of few magnesium.
The present invention sets out from aluminium, Seandium, zirconium intermediate alloy (2wt%Sc, 1-2wt%Zr), further reduces the content of scandium zirconium, makes
Sc content is 0.08-0.8%, and Zr content is 0.08-0.4%, at the same be incorporated appropriate magnesium, manganese element form the present invention
Intermediate alloy, magnesium manganese is all reinforced alloys element, while manganese also has the effect for reducing harmful element iron in aluminium.It is produced into reduction
This while, composition slightly adjust i.e. configurable other 5 be 7 be alloy.
The present invention is using inexpensive Sc2O3、ZrO2For raw material obtain in high yield scandium zirconium (>95%), with reference to water cooled mo(u)ld
Quick cooling technique so that the second phase Al of scandium zirconium3(ScZr) particle is tiny, is evenly distributed.
The invention has the advantages that scandium bearing master alloy or aluminium, Seandium, zirconium intermediate alloy are replaced with polynary intermediate alloy, compared with
Reduce to big degree the content of intermediate alloy scandium zirconium, improve the reduction yield of scandium zirconium, reduce the production cost of aluminium alloy；Together
The manganese strengthened alloying element of Shi Zengjia magnesium, manganese also have the effect for reducing harmful element iron in aluminium.The polynary intermediate alloy of the present invention
Combination property is good, has preferably rotten reinforcing effect.
Embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1：In 200kg middle frequency furnaces, 95kg aluminium is put into graphite crucible, and adds and is pre-mixed drying
Good 5.17kg fused salts are (wherein：Sc2O3 1.07kg、ZrO2 0.4kg、NH4F 2.0kg、NaF 0.25kg、KCl 1.3kg、
MgCl20.15kg).950 DEG C are heated to, is incubated 40 minutes.Stir, skim, be then cooled to 760 DEG C, add manganese metal
0.4kg, magnesium 5.6kg, stir.After 10 minutes, Ar/N is filled2Degasification, sampling analysis are cooled to 710 DEG C, water cooled mo(u)ld ingot casting,
About 100kg ingots, ingot casting constituent analysis are Mg4.9%, Mn 0.4%, Sc 0.71%, Zr 0.3%, surplus Al.
Embodiment 2：In 200kg middle frequency furnaces, 100kg Al is put into graphite crucible, addition is pre-mixed drying
Good 6.0kg fused salts are (wherein：Sc2O3 1.2kg、ZrO2 0.5kg、NH4F 2.3kg、NaF 0.3kg、KCl 1.5kg、MgCl2
0.2kg).900 DEG C are heated to, is incubated 1hr.Stir, skim, be then cooled to 740 DEG C, add manganese metal 0.6kg, metal
Magnesium 5.5kg, stirs.After 15 minutes, Ar/N is filled2Degasification, sampling analysis are cooled to 720 DEG C, water cooled mo(u)ld ingot casting, about
106kg ingots, ingot casting constituent analysis are Mg5.0%, Mn 0.56%, Sc 0.75%, Zr 0.35%, surplus Al.
Embodiment 3：In 200kg middle frequency furnaces, 100kg Al is put into graphite crucible, addition is pre-mixed drying
Good 3.0kg fused salts are (wherein：Sc2O3 0.6kg、ZrO2 0.25kg、NH4F 1.15kg、NaF 0.15kg、KCl 0.75kg、
MgCl20.1kg).900 DEG C are heated to, is incubated 1hr.Stir, skim, be then cooled to 740 DEG C, add manganese metal
0.21kg, magnesium metal 2.5kg, stir.After 15 minutes, Ar/N is filled2Degasification, sampling analysis, 720 DEG C are cooled to, water cooled mo(u)ld
Ingot casting, about 102kg ingots, ingot casting constituent analysis are Mg2.2%, Mn 0.2%, Sc 0.37%, Zr 0.17%, surplus Al.
Embodiment 4：In 200kg middle frequency furnaces, 100kg Al is put into graphite crucible, addition is pre-mixed drying
Good 1.0kg fused salts are (wherein：Sc2O3 0.2kg、ZrO2 0.08kg、NH4F 0.4kg、NaF 0.05kg、KCl 0.25kg、
MgCl20.02kg).900 DEG C are heated to, is incubated 1hr.Stir, skim, be then cooled to 740 DEG C, add manganese metal
0.4kg, magnesium metal 3.0kg, stir.After 15 minutes, Ar/N is filled2Degasification, sampling analysis, 720 DEG C are cooled to, water-cooled die casting
Ingot, about 103kg ingots, ingot casting constituent analysis are Mg2.8%, Mn 0.4%, Sc 0.1%, Zr 0.06%, surplus Al.
Embodiment 5：With the intermediate alloy 100kg of embodiment 2, metallic zinc 8.5kg, metallic copper 1.5kg, fine aluminium is raw material, is matched somebody with somebody
It is that alloying component is Zn 7.8%, Mg 2.7%, Cu 1.3%, Mn 0.3%, Zr0.15%, Sc 0.35% to put 7, and remaining is aluminium.
Using resistance furnace melting.Temperature control is at 710~750 DEG C.Using carbon trichloride refinery by de-gassing, semicontinuous ingot casting；Ingot casting is through 470
DEG C/2hr homogenization after, air cooling.Peeling, hot rolling after 450 DEG C/4h heating, hot rolling deformation amount 70%, then it is cold rolled to 2mm slabs
Material, cold rolling reduction 60%.Melted admittedly in 470 DEG C/2hr, water quenching, 120 DEG C/24h Ageing Treatments, obtain aluminum alloy materials.
The mechanical performance of the aluminum alloy materials of acquisition is tensile strength sigmab=650Mpa, yield strength σ0.2=610Mpa,
Elongation percentage δ=11%.
Embodiment 6：With the intermediate alloy 100kg of embodiment 3, magnesium metal 3kg, metallic copper 0.1kg, fine aluminium is raw material, configuration 5
It is that alloying component is Mg 5%, Cu 0.1%, Mn 0.2%, Zr 0.15%, Sc0.35%, remaining is aluminium.Melted using resistance furnace
Refining.Temperature control is at 710~750 DEG C.Using carbon trichloride refinery by de-gassing, semicontinuous ingot casting；Ingot casting is uniform through 470 DEG C/10hr
After change, air cooling.Peeling, hot rolling after 450 DEG C/2h heating, the deflection of hot rolling 80%, then 2mm heavy-gauge sheetings are cold rolled to, cold rolling 50% becomes
Shape amount.Made annealing treatment in 350 DEG C/1hr, obtain aluminum alloy materials.
The mechanical performance of the aluminum alloy materials of acquisition is：Tensile strength sigmab=450MPa, yield strength σ0.2=278MPa,
Elongation percentage δ=18%.Compare Mg5%, the 5 of remaining Al be alloy, the mechanical performance under equal conditions is：Tensile strength sigmab=
280MPa, yield strength σ0.2=125MPa, elongation percentage δ=25%.The alloy property prepared with the present invention is significantly lifted.
Claims (7)
- A kind of 1. polynary intermediate alloy of aluminium alloy, it is characterised in that the polynary intermediate alloy quality group turn into Mg 2~ 6%, Mn 0.2~0.8%, Sc 0.08~0.8%, Zr 0.08~0.4%, surplus Al.
- 2. the preparation method of the polynary intermediate alloy described in a kind of claim 1, it is characterised in that comprise the following steps：(1) it is 100 by mass ratio：1~7 pure Al and fused salt is put into smelting furnace, is heated to melting, and at 850~980 DEG C Under, it is incubated 0.5-1 hours；(2) 720~760 DEG C are cooled to, adds metal Mn and Mg, is incubated 10-20 minutes, stirring homogenizes alloy；(3) aluminium liquid surface fused salt is removed, and argon gas is passed through in aluminium liquid, degasification, after standing, is skimmed；(4) alloy molten solution is obtained into polynary intermediate alloy with water cooled mo(u)ld ingot casting.
- 3. preparation method according to claim 2, it is characterised in that in step (4), control the temperature 700~730 of ingot casting ℃。
- 4. preparation method according to claim 2, it is characterised in that the smelting furnace is non-vacuum melting stove.
- 5. preparation method according to claim 2, it is characterised in that the quality group of each composition turns into the fused salt：
- 6. preparation method according to claim 2, it is characterised in that in step (3), the time of standing is 5~10 minutes.
- 7. preparation method according to claim 2, it is characterised in that in step (2), first add metal Mn, add gold Belong to Mg.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108796320A (en) * | 2018-09-19 | 2018-11-13 | 湖南东方钪业股份有限公司 | A kind of Al alloy powder and preparation method thereof for 3D printing |
| CN109047783A (en) * | 2018-08-15 | 2018-12-21 | 长沙新材料产业研究院有限公司 | A kind of Al alloy powder and preparation method thereof |
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