CN109234577A - A kind of Al-Sc-B heat-resisting alloy monofilament and preparation method thereof - Google Patents
A kind of Al-Sc-B heat-resisting alloy monofilament and preparation method thereof Download PDFInfo
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- CN109234577A CN109234577A CN201811112311.1A CN201811112311A CN109234577A CN 109234577 A CN109234577 A CN 109234577A CN 201811112311 A CN201811112311 A CN 201811112311A CN 109234577 A CN109234577 A CN 109234577A
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- 239000000956 alloy Substances 0.000 title claims abstract description 64
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 40
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000004411 aluminium Substances 0.000 claims abstract description 30
- 239000012535 impurity Substances 0.000 claims abstract description 21
- 238000005275 alloying Methods 0.000 claims abstract description 17
- 229910052742 iron Inorganic materials 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 14
- 238000004321 preservation Methods 0.000 claims abstract description 10
- 229910052706 scandium Inorganic materials 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- 239000010936 titanium Substances 0.000 claims description 18
- 229910000838 Al alloy Inorganic materials 0.000 claims description 16
- 239000011572 manganese Substances 0.000 claims description 15
- 229910052720 vanadium Inorganic materials 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 229910052719 titanium Inorganic materials 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 8
- 239000011651 chromium Substances 0.000 claims description 8
- 238000009749 continuous casting Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000007670 refining Methods 0.000 claims description 7
- ZBZJXHCVGLJWFG-UHFFFAOYSA-N trichloromethyl(.) Chemical compound Cl[C](Cl)Cl ZBZJXHCVGLJWFG-UHFFFAOYSA-N 0.000 claims description 7
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- -1 Hexafluoro sodium aluminate Chemical compound 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000005491 wire drawing Methods 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910021538 borax Inorganic materials 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 239000004328 sodium tetraborate Substances 0.000 claims description 3
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 2
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 1
- PMZURENOXWZQFD-UHFFFAOYSA-L sodium sulphate Substances [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims 1
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 3
- 150000002910 rare earth metals Chemical class 0.000 abstract description 3
- 230000004083 survival effect Effects 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 description 14
- 230000005540 biological transmission Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003574 free electron Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910001610 cryolite Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/023—Alloys based on aluminium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Conductive Materials (AREA)
Abstract
The present invention provides a kind of Al-Sc-B heat-resisting alloy monofilament and preparation method thereof, alloy filaments are made of the alloying element of following weight percentage: B:0.01~0.02%, Sc:0.1~0.3%, Si :≤0.06%, Fe :≤0.2%, (V+Ti+Cr+Mn)≤0.012%, remaining content for aluminium and inevitable other trace impurities.Trace alloying element is added in the alloy, addition trace rare-earth Sc element is modified alloy and optimizes and revises alloying element content, it ensure that alloy mechanical property, conductivity is improved, monofilament conductivity >=62.5%IACS (20 DEG C), elongation percentage >=2.1%, 230 DEG C of heat preservation 1h intensity survival rate >=93%, meets the requirement that longtime running temperature is 150 DEG C at tensile strength >=171MPa.
Description
Technical field
The invention belongs to transmission line of electricity aerial condutor manufacturing technology field, in particular to a kind of Al-Sc-B heat-resisting alloy
Monofilament and preparation method thereof.
Background technique
The research and application of alloy material aerial condutor have the course into a century, since its intensity is high, light-weight,
And having preferable electric conductivity, the nineteen twenty-one U.S. is begun to using aluminum alloy materials as conductor.
Requirement of the existing power grid construction to overhead power transmission conducting wire is higher and higher, remote, large capacity, large span novel
Transmission line of electricity shows a increasing trend.The high-pressure trend of transmission line of electricity, remote and high capacity are to the heat resistance and intensity of transmission line of electricity
Requirement it is higher and higher, in order to enable aluminum alloy to conducting wire, intensity is not reduced in During Process of Long-term Operation at the normal operating temperature, is not increased
Add conducting wire sag, zirconium, titanium etc. are added usually in electrician's fine aluminium and improves the recrystallization temperature of aluminium to improve aluminium alloy conductor
Heat resistance.But although the addition of zirconium, titanium alloy element ensure that heat resistance, can cause the reduction of aluminium alloy conductor conductivity.
V, Ti, Cr content are higher in the prior art, and practical experience shows for the damage of electric conductivity, every 1% Cr,
The damage of Ti, Mn, V to it is 5 times of every 1%Si.The impurity elements such as Ti, V, Cr in aluminium conductor are in the presence of being dissolved state, very
It is easy the free electron absorbed in conductor material and fills their incomplete electronic shell.The reduction of the number of electrons of this conduction
Undoubtedly result in the reduction of aluminium conductor electric conductivity.
Therefore, a kind of heat-resist, excellent alloy of electric conductivity need to be provided.
Summary of the invention
To overcome drawbacks described above of the existing technology, the present invention provides a kind of Al-Sc-B heat-resisting alloy monofilament and its
Preparation method, the microstructure and comprehensive performance of alloy are improved by the micro Sc of addition, B element, and the alloy conductive rate is not low
It is not less than 2.1%, long-term heat resisting temperature >=150 DEG C not less than 171MPa, elongation percentage in 62.5%IACS (20 DEG C), tensile strength
(230 DEG C of heat preservation 1h intensity survival rate >=90%).
For achieving the above object, the technical scheme adopted by the invention is as follows:
A kind of Al-Sc-B heat-resisting alloy monofilament, the alloy filaments are made of the alloying element of following weight percentage: boron
B:0.01~0.02%, scandium Sc:0.1~0.3%, silicon Si :≤0.06%, iron Fe :≤0.2%, (vanadium V+ titanium Ti+ chromium Cr+ manganese
Mn)≤0.012%, remaining content for aluminium and inevitable trace impurity.
Preferably, the alloy filaments are made of the alloying element of following weight percentage: B:0.02%, Sc:0.25%,
Si:0.05%, Fe:0.11%, V+Ti+Cr+Mn 0.005%, surplus are aluminium and inevitable impurity.
Preferably, the alloy filaments are made of the alloying element of following weight percentage: B:0.016%, Sc:
0.21%, Si:0.008%, Fe:0.04%, V+Ti+Cr+Mn 0.009%, surplus are aluminium and inevitable impurity.
Preferably, the alloy filaments are made of the alloying element of following weight percentage: B:0.012%, Sc:
0.25%, Si:0.05%, Fe:0.2%, V+Ti+Cr+Mn 0.01%, surplus are aluminium and inevitable impurity.
A method of Al-Sc-B heat-resisting alloy monofilament described in any of the above-described being prepared, described method includes following steps:
(1) at 730~750 DEG C, the alloying element is added into the aluminium ingot fusant of purity >=99.7%；
(2) under stirring in the fusant of step 1) 5~15min of nitrogen-blow or argon gas at 710~730 DEG C, skim or
Heat preservation at 730~750 DEG C of carbon trichloride is added and stands 10~20min, skims；
The aluminum alloy melt for obtaining step 2) at (3) 700~720 DEG C pours into metal die；520~530 DEG C of tripping in are rolled, warp
5 passes at φ 9.5mm alloy round bar；
(4) wire drawing of alloy round bar is made in step 4), obtains the monofilament of 3~4mm of Φ；
(5) monofilament made from step 5) is kept the temperature to 3~12h at 300~400 DEG C.
Preferably, in step 1)
The alloying element is added by following sequences:
Al-B intermediate alloy borax treatment is added after being completely melt in aluminium ingot；
730~750 DEG C of addition Al-Sc intermediate alloys are completely melt, are stirred 10~15min and are stood 15~20min.
Preferably, in the step 2) at 730 DEG C, deslagging agent is added in the ratio of molten aluminum quality 0.1%.
Preferably, nitrogen-blow or argon gas and refining agent or spray is added in the ratio of molten aluminum quality 4% in the step 2)
Carbon trichloride is blown, 35min is blown, heat preservation stands 40min at 740 DEG C；
The refining agent includes potassium chloride 24 according to parts by weight；Sodium chloride 35；Calcirm-fluoride 14；Sodium carbonate 50；Sulfuric acid
Sodium 15；Hexafluoro sodium aluminate 12 and carbon trichloride 6.
Preferably, the step 3) pours into metal die, and at 700 DEG C, the aluminium alloy that step 2) is obtained pours into crystallization
In wheel continuous casting billet, at 555 DEG C, with the ejection speed ejection of 10m/min.
Preferably, the alloying element that the step 1) is added is intermediate alloy.
Each alloys producing and mechanism are as follows:
Boron: in numerous influence factors, chemical component is to influence the most basic factor of aluminium conductor conductivity, therefore drop
Influence of the low impurity element to conductivity is the key that improve the act of aluminium conductor conductivity.If impurity element is deposited with solid solution condition
The influence to electric conductivity is bigger.Borax treatment is a kind of effective ways for reducing impurity content, i.e., is added in aluminium alloy
It after a certain amount of B element, can react, be allowed to by solid solution being changed into of state with Transition Group Impurities element Cr, Mn, V, Ti etc.
It closes state and is deposited on melt bottom, to improve the electric conductivity of aluminium alloy.
Scandium Sc: rare earth Sc is added in the present invention can significantly improve the conductivity, intensity and heat resistance of aluminium alloy.Sc addition
It can play the role of refining crystal grain；It is reacted by heat treatment Sc with Al and generates Al3Sc precipitated phase, to improve alloy strength；
Due to Al3Sc phase has preferable high-temperature stability, while can guarantee the heat resistance of alloy.
Silicon Si: silicon is one of the major impurity element in industrial aluminum, and Si can generate the second phase with element reactions such as Fe, Re,
To improve the mechanical property of aluminium alloy.
Iron Fe: contain a certain amount of iron in aluminium, be one of industrial aluminum major impurity.Mechanical property of the iron to casting aluminium
It is harmful, because it usually occurs with a coarse crystal, or exists in the form of aluminium-iron-silicon compound, their certain journeys
The hardness of aluminium is all improved on degree, but reduces the plasticity of aluminium.Studies have shown that aluminium conductor intensity can be improved in iron, not significantly
Reduce its electric conductivity.But also its resistivity can be made significantly to rise data show that in actual production, the Fe in aluminium conductor is excessively high
Height, so it should also be noted that the content of control iron.
V, Mn, Cr, Ti: these types of element is the impurity element in alloy, is affected to the electric conductivity of aluminium alloy.
The impurity elements such as Ti, V, Mn, Cr in aluminium conductor are in the presence of being dissolved state, it is easy to absorb the free electron in conductor material and
Fill their incomplete electronic shell.The reduction of this conduction number of electrons results in the reduction of aluminium conductor electric conductivity.Study table
Bright, the illeffects of every 1% (Cr+Ti+Mn+V) is every 1% silicon to 5 times of aluminium electric conductivity illeffects.It can be seen that tight
The content that lattice control these types of element has important practical application meaning to the quality for guaranteeing aluminium conductor.
Compared with the latest prior art, technical solution provided by the invention has the beneficial effect that:
1, trace rare-earth Sc element is added in alloy, passes through heat treatment for Al-Sc-B heat-resisting alloy monofilament provided by the invention
Form Al3Sc phase, the Al3Sc phase has a preferable high-temperature stability, and Sc element can make Fe, Si from solid solution atomic transformation the
Two-phase reduces distortion of lattice, guaranteeing that alloy mechanical property and heat resistance on the basis of improve conductivity, at 20 DEG C again
Monofilament conductivity >=62.5%IACS.
2, high conductivity and heat heat resistance alloy filaments provided by the invention, control alloy in impurity content, tensile strength >=
171MPa。
3, high conductivity and heat heat resistance alloy filaments provided by the invention control impurity content in alloy, elongation percentage >=2.1%.
4, high conductivity and heat heat resistance alloy filaments provided by the invention control impurity content in alloy, 230 DEG C of heat preservation 1h intensity
Remaining rate >=93% meets the requirement that longtime running temperature is 150 DEG C.
5, Al-Sc-B heat-resisting alloy monofilament provided by the invention optimizes the preparation work of continuous casting and rolling using continuous casting and rolling
Skill parameter.
Specific embodiment
Below with reference to example, the present invention will be described in detail.
Embodiment 1
Alloy filaments are made of the alloying element of following weight percentage:
The preparation of alloy filaments includes the following steps:
1) it smelts: by purity 99.7%①Aluminium ingot it is molten after, at 730 DEG C of temperature②Al-B intermediate alloy is added, is completely melt
After be warming up to 735 DEG C③Al-Sc intermediate alloy is added, stirs 10min after being completely melt④, heat preservation standing 15min⑤, obtain molten aluminum；
2) it refines: stirring and in 730 DEG C⑥Under in the molten aluminum of step 1) in molten aluminum quality 0.2% ratio addition remove
Slag agent, nitrogen-blow⑦Refining agent is added in the ratio of molten aluminum quality 3%, is blown 15min⑧, 730 DEG C⑨Lower heat preservation stands 20min⑩, skim；Refining agent is by sodium chloride, potassium chloride, potassium fluosilicate, cryolite, light sodium carbonate, calcirm-fluoride, carbon trichloride, sulphur
Sour sodium, potassium fluoroaluminate and quartz sand composition；
3) continuous casting:The lower aluminum alloy melt for obtaining step 2), which pours into, obtains continuous casting billet in crystallizing wheel,Under with
10m/min speed ejection；Make the temperature of continuous casting billet to the size of slab amount of water sprayed by adjusting
4) tandem rolling: the continuous casting billet that step 3) is obtained is sent into hot tandem,Tripping in is rolled, through 5 passes at
The Aluminum alloy round bar of φ 9.5mm；
5) wire drawing: Aluminum alloy round bar wire drawing is made in step 4), is obtainedMonofilament,Lower heat preservation
The alloy compositions of the embodiment of the present invention 2~9 of table 1 by mass percentage:
The process parameter table of 2 embodiment of the present invention 2~9 of table
Note: whereinMeaning see embodiment 1
Filament properties table obtained by 3 embodiment of the present invention of table
As shown above, high conductivity and heat heat resistance monofilament elongation percentage >=2.0% provided by the invention, conductivity >=62.5%IACS,
Simultaneously tensile strength >=171MPa, intensity remnants rate >=93% of 1h is kept the temperature at 230 DEG C, it is resistance to that this illustrates that height provided by the invention is led
Hot monofilament can satisfy the requirement run at 150 DEG C for a long time.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Invention is explained in detail referring to above-described embodiment for pipe, it should be understood by those ordinary skilled in the art that: still
It can be with modifications or equivalent substitutions are made to specific embodiments of the invention, and without departing from any of spirit and scope of the invention
Modification or equivalent replacement, are intended to be within the scope of the claims of the invention.
Claims (10)
1. a kind of Al-Sc-B heat-resisting alloy monofilament, which is characterized in that the alloy filaments are first by the alloy of following weight percentage
Element is made: boron: 0.01~0.02%, scandium Sc:0.1~0.3%, and silicon Si :≤0.06%, iron Fe :≤0.2%, (vanadium V+ titanium Ti+
Chromium Cr+ manganese Mn)≤0.012%, remaining for aluminium content and inevitable trace impurity.
2. a kind of Al-Sc-B heat-resisting alloy monofilament as described in claim 1, it is characterised in that: the alloy filaments are by following
The alloying element of weight percent is made: B:0.02%, Sc:0.25%, Si:0.05%, Fe:0.11%, V+Ti+Cr+Mn:
0.005%, surplus is aluminium and inevitable impurity.
3. a kind of Al-Sc-B heat-resisting alloy monofilament as described in claim 1, it is characterised in that: the alloy filaments are by following
The alloying element of weight percent is made: B:0.016%, Sc:0.21%, Si:0.008%, Fe:0.04%, V+Ti+Cr+Mn:
0.009%, surplus is aluminium and inevitable impurity.
4. a kind of Al-Sc-B heat-resisting alloy monofilament as described in claim 1, it is characterised in that: the alloy filaments are by following
The alloying element of weight percent is made: B:0.012%, Sc:0.25%, Si:0.05%, Fe:0.2%, V+Ti+Cr+Mn:
0.01%, surplus is aluminium and inevitable impurity.
5. a kind of method for preparing the Al-Sc-B heat-resisting alloy monofilament as described in any one of Claims 1 to 4, it is characterised in that: institute
The method of stating includes the following steps:
(1) at 730~750 DEG C, the alloying element is added into the aluminium ingot fusant of purity >=99.7%；
(2) under stirring in the fusant of step 1) 5~15min of nitrogen-blow or argon gas at 710~730 DEG C, skim or be added
Heat preservation stands 10~20min at 730~750 DEG C of carbon trichloride, skims；
The aluminum alloy melt for obtaining step 2) at (3) 700~720 DEG C pours into metal die；520~530 DEG C of tripping in are rolled, through 5
The secondary alloy round bar for being rolled into φ 9.5mm；
(4) wire drawing of alloy round bar is made in step 4), obtains the monofilament of 3~4mm of Φ；
(5) monofilament made from step 5) is kept the temperature to 3~12h at 300~400 DEG C.
6. a kind of preparation method of Al-Sc-B heat-resisting alloy monofilament as claimed in claim 5, it is characterised in that: in step 1)
The alloying element is added by following sequences:
Al-B intermediate alloy borax treatment is added after being completely melt in aluminium ingot；
730~750 DEG C of addition Al-Sc intermediate alloys are completely melt, are stirred 10~15min and are stood 15~20min.
7. a kind of preparation method of Al-Sc-B heat-resisting alloy monofilament as claimed in claim 5, it is characterised in that: the step
2) at 730 DEG C, deslagging agent is added in the ratio of molten aluminum quality 0.1%.
8. a kind of preparation method of Al-Sc-B heat-resisting alloy monofilament as claimed in claim 5, it is characterised in that: the step
2) in nitrogen-blow or argon gas and in the ratio of molten aluminum quality 4% be added refining agent or blowing carbon trichloride, be blown 5min,
Heat preservation stands 20min at 740 DEG C；
The refining agent includes potassium chloride 24 according to parts by weight；Sodium chloride 35；Calcirm-fluoride 14；Sodium carbonate 50；Sodium sulphate4
15；Hexafluoro sodium aluminate 12 and carbon trichloride 6.
9. a kind of preparation method of Al-Sc-B heat-resisting alloy monofilament as claimed in claim 5, it is characterised in that: the step
3) metal die is poured into, at 700 DEG C, the aluminium alloy that step 2) is obtained pours into and obtains continuous casting billet in crystallizing wheel, at 555 DEG C, with
The ejection speed ejection of 10m/min.
10. a kind of preparation method of Al-Sc-B heat-resisting alloy monofilament as claimed in claim 5, it is characterised in that: the step
1) alloying element being added is intermediate alloy.
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| CN113957301A (en) * | 2021-10-28 | 2022-01-21 | 全球能源互联网研究院有限公司 | Aluminum alloy monofilament and preparation method thereof |
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