CN111826558A - Aluminum-magnesium-silicon alloy monofilament and preparation method thereof - Google Patents
Aluminum-magnesium-silicon alloy monofilament and preparation method thereof Download PDFInfo
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- CN111826558A CN111826558A CN202010504114.5A CN202010504114A CN111826558A CN 111826558 A CN111826558 A CN 111826558A CN 202010504114 A CN202010504114 A CN 202010504114A CN 111826558 A CN111826558 A CN 111826558A
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- 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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- 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
- C22F1/047—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 of alloys with magnesium as the next major constituent
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Abstract
The invention provides an aluminum-magnesium-silicon alloy monofilament and a preparation method thereof, wherein the alloy monofilament comprises the following components in percentage by mass: 0.50-0.70% of magnesium, 0.30-0.50% of silicon, 0.30-0.50% of erbium, 0-0.08% of lanthanum (cerium), 0.01-0.02% of boron, less than or equal to 0.01% of impurity elements of vanadium, titanium, chromium and manganese, and the balance of aluminum and inevitable impurities. The monofilament preparation method comprises the following steps: smelting, refining, casting, rolling, wire drawing and aging treatment. The aluminum alloy monofilament with the conductivity of more than or equal to 56 percent IACS (20 ℃), the tensile strength of more than or equal to 300MPa and the elongation of more than or equal to 3.0 percent is obtained by adjusting the amount ratio of the components of the aluminum-magnesium-silicon alloy monofilament and selecting the corresponding preparation process.
Description
Technical Field
The invention relates to an electrical conductor material, in particular to an aluminum alloy monofilament.
Background
With the rapid development of industry, the demand for electricity is rising year by year. The comprehensive performance of the overhead conductor serving as an important carrier for power transmission of a power grid directly influences the safety of power transmission and the transmission efficiency of energy. The high-strength overhead conductor can ensure the safe operation of the conductor in severe service environments such as ice coating, wind load and the like, and the high conductivity of the high-strength overhead conductor can improve the electric energy transmission efficiency of a power transmission line and reduce the transmission loss.
The aluminum-magnesium-silicon alloy is a preferred material for long-distance and large-span power transmission lines due to low alloying degree, high specific strength, good mechanical property and electrical conductivity and high corrosion resistance. However, the existing aluminum-magnesium-silicon alloy wire has low conductivity and is difficult to meet the power transmission requirements of energy conservation and loss reduction.
Therefore, it is desirable to provide a wire material of aluminum-magnesium-silicon alloy with high strength and high electrical conductivity.
The invention content is as follows:
the invention aims to prepare an aluminum-magnesium-silicon alloy monofilament material with high strength and high conductivity by taking an electrical aluminum ingot with the purity of 99.7 percent as a raw material so as to meet the requirements of the prior art.
The invention improves the microstructure and the comprehensive performance of the alloy by adding trace erbium, lanthanum (cerium) and boron elements and corresponding preparation process, and obtains the aluminum alloy monofilament with the conductivity of more than or equal to 56 percent IACS (20 ℃), the tensile strength of more than or equal to 300MPa and the elongation of more than or equal to 3.0 percent.
The technical scheme for implementing the purpose is as follows:
in an aluminum-magnesium-silicon alloy monofilament, the improvement comprising in mass percent:
0.50-0.70% of magnesium, 0.30-0.50% of silicon, 0.30-0.50% of erbium, 0-0.08% of lanthanum (cerium), 0.01-0.02% of boron, less than or equal to 0.01% of impurity elements of vanadium, titanium, chromium and manganese, and the balance of aluminum and inevitable impurities.
Wherein, erbium accounts for 0.30-0.50%, lanthanum (cerium) accounts for 0-0.08%, and boron accounts for 0.01-0.02%.
The preparation process of the monofilament comprises the following steps: smelting the aluminum ingot with the purity higher than a preset purity threshold in a smelting furnace at 730-750 ℃;
adding an aluminum-lanthanum intermediate alloy, an aluminum-cerium intermediate alloy or lanthanum-cerium mischmetal into the melt at 730-740 ℃, adding an aluminum-boron intermediate alloy, melting, and standing for the first time to remove impurities;
adding pure magnesium, an aluminum-silicon intermediate alloy and an aluminum-erbium intermediate alloy into the solution subjected to standing impurity removal at 730-750 ℃, melting, stirring and standing for the second time to remove impurities;
blowing nitrogen with the pressure of 0.5-0.8 MPa into the melt at the temperature of 710-730 ℃, standing for a third time and slagging off;
pouring the melt at 700-720 ℃ into a metal mold to obtain an ingot;
rolling or extruding the ingot which is kept at 510-530 ℃ for 1-2 h into a rod material with the diameter of 9.5mm, and performing water quenching and wire drawing.
And the ingot casting rolling is continuous casting and rolling, wherein the continuous casting and rolling comprises the steps of rolling the melt obtained by slagging off at the temperature of 510-530 ℃, cooling the coolant at the temperature of not less than 400 ℃, and discharging the rod at the temperature of 90-100 ℃ to obtain the rod material.
And the extrusion comprises the steps of casting the melt after slagging off to obtain a cast ingot, extruding the cast ingot at the temperature of 510-530 ℃, extruding the cast ingot at the temperature of not less than 400 ℃, cooling by using a cooling liquid, and discharging the cast ingot at the temperature of 90-100 ℃ to obtain the rod material.
Drawing the rod material for 8-12 times to obtain a phi 3-4 mm monofilament; and aging the monofilament at 175-190 ℃ for 6-10 h to obtain the aluminum-magnesium-silicon alloy monofilament.
Wherein, the standing for the first time for impurity removal comprises the following steps: standing for 40-60 min, and pouring 4/5 of the solution into another holding furnace from the upper part of the smelting furnace to obtain a solution subjected to standing and impurity removal.
Wherein the second time is 15-20 min; the third time is 20-30 min.
Wherein the stirring time and the nitrogen blowing time are both 10-15 min.
Smelting an aluminum ingot with the purity higher than a preset purity threshold in a smelting furnace at 730-750 ℃;
adding an aluminum-lanthanum intermediate alloy, an aluminum-cerium intermediate alloy or lanthanum-cerium mischmetal into the melt at 730-740 ℃, adding an aluminum-boron intermediate alloy, melting, and standing for the first time to remove impurities;
adding pure magnesium, an aluminum-silicon intermediate alloy and an aluminum-erbium intermediate alloy into the solution subjected to standing impurity removal at 730-750 ℃, melting, stirring and standing for the second time to remove impurities;
blowing nitrogen with the pressure of 0.5-0.8 MPa into the melt at the temperature of 710-730 ℃, standing for a third time and slagging off;
pouring the melt at 700-720 ℃ into a metal mold to obtain an ingot;
rolling or extruding the cast ingot which is kept at 510-530 ℃ for 1-2 h
The rod material is water quenched and drawn to obtain the aluminum-magnesium-silicon alloy monofilament with the following components: 0.50-0.70% of magnesium, 0.30-0.50% of silicon, 0.30-0.50% of erbium, 0-0.08% of lanthanum (cerium), 0.01-0.02% of boron, less than or equal to 0.01% of impurity elements of vanadium, titanium, chromium and manganese, and the balance of aluminum and inevitable impurities.
Compared with the closest prior art, the technical scheme provided by the invention has the following beneficial effects:
the magnesium in the technical scheme provided by the invention has an obvious strengthening effect on aluminum, and the tensile strength of the obtained product is increased by about 34MPa every time 1% of magnesium is added. In the aluminum-magnesium-silicon alloy, the strengthening phase magnesium silicide plays a strengthening role in the alloy; the magnesium silicide strengthening phase also has a certain influence on the conductivity of the alloy. When the magnesium content is low, the conductivity of the alloy is generally high and the strength is low, but the conductivity of the alloy is also improved when a moderate excess of magnesium is subjected to heat treatment to fully precipitate magnesium silicide.
The silicon in the technical scheme of the invention, which is one of the most common elements of the aluminum alloy, can form a plurality of compounds in the alloy, so that the aluminum alloy can be subjected to heat treatment, the castability and the welding fluidity of the aluminum alloy are improved, and the aluminum alloy has higher mechanical properties.
The rare earth element erbium can obviously improve the strength of the aluminum alloy. Moreover, the addition of erbium can reduce dendritic crystal segregation of the aluminum alloy and obviously refine the grain structure of the alloyIt is believed that the higher erbium content results from the formation of primary aluminum in the melt3Erbium particles can be used as heterogeneous nucleation cores when crystallized and nucleated, so that the grain structure is obviously refined; besides, erbium can react with part of impurity elements in the aluminum alloy to convert the impurity elements from an atomic state to a precipitated state, so that the conductivity of the aluminum alloy is improved.
The invention has the technical scheme that the rare earth selected from lanthanum, cerium or lanthanum-cerium mixed rare earth can purify the alloy liquid, change impurity elements such as iron, silicon and the like from solid solution atoms into a second phase, reduce lattice distortion and improve the conductivity of the aluminum alloy.
According to the technical scheme, boron can react with transition group components of chromium, manganese, vanadium and titanium serving as impurity elements, so that the boron is converted from a solid solution state to a chemical combination state and is deposited at the bottom of a melt, and the conductivity of the aluminum alloy is improved.
In addition, vanadium, manganese, chromium and titanium in the technical scheme of the invention are impurity elements in the aluminum alloy, and have great influence on the conductivity of the aluminum alloy. When impurity elements such as titanium, vanadium, manganese, chromium and the like exist in a solid solution state in the aluminum alloy conductor, free electrons in the conductor material are easily absorbed to fill the incomplete electron layer, so that the number of conduction electrons is reduced, and the conductivity of the aluminum alloy conductor is reduced. It was found that the detrimental effect on the conductivity of aluminium for every 1% increase in the content of (chromium + titanium + manganese + vanadium) corresponds to 5 times for every 1% increase in silicon. In the technical scheme of the invention, the content of the elements is strictly controlled, so that the quality of the aluminum conductor is ensured.
According to the technical scheme provided by the invention, rare earth elements of erbium, lanthanum (cerium) and boron are added into the aluminum-magnesium-silicon alloy, a corresponding aging treatment process is adopted to enable part of impurity atoms to generate a second phase, and the second phase is removed through precipitation, and then corresponding aging treatment is adopted to enable melt atoms to be separated out, so that the strengthening effect is achieved, and the lattice distortion is reduced, so that the conductivity is improved, and the aluminum alloy monofilament with the conductivity of more than or equal to 56% IACS (20 ℃), the tensile strength of more than or equal to 300MPa and the elongation of more than or equal to 3.0% is obtained.
The specific implementation scheme is as follows:
the technical solution provided by the present invention is explained in detail by way of specific examples below.
The term "from the upper part of the melting furnace" means that the melt in the "upper part of the melting furnace" is taken out to another holding furnace.
The conductivity of each embodiment of the application is the conductivity converted from the monofilament resistance measured by a TEGAM 1750 high-precision high-speed programmable micro-ohmmeter by performing performance detection according to the requirement of an aluminum-magnesium-silicon alloy round wire for the GB/T23308 overhead stranded wire; the tensile strength is measured by a three-sensor CMT6104 microcomputer control electronic universal tester.
Example 1
An aluminum-magnesium-silicon alloy monofilament comprises the following components in percentage by mass:
| element(s) | Magnesium alloy | Silicon | Erbium (erbium) | Lanthanum (cerium) | Boron | Vanadium + titanium + chromium + manganese | Aluminium |
| Mass fraction/wt. -%) | 0.50 | 0.30 | 0.50 | 0.08 | 0.01 | 0.01 | Balance of |
Adding an electrician pure aluminum ingot with the purity of 99.7% into a smelting furnace at 730 ℃ for smelting;
after melting, adding the aluminum-lanthanum intermediate alloy and the aluminum-boron intermediate alloy at 740 ℃, fully stirring after completely melting, and standing for 40 min;
pouring 4/5 molten liquid into another heat preserving furnace from the upper part of the smelting furnace, adding pure magnesium, aluminum-silicon intermediate alloy and aluminum-erbium intermediate alloy at 730 ℃, stirring for 15min after complete melting, and standing for 15 min;
blowing 0.5-0.8 MPa nitrogen for 15min at 715 ℃, standing for 20min, and slagging off;
pouring aluminum alloy liquid at 700 ℃ into a metal mold to obtain an ingot with the thickness of 22 multiplied by 200 mm;
rolling the ingot which is kept at 510 ℃ for 2h into an aluminum alloy round rod with the diameter of 9.5mm, then quickly quenching with water, obtaining an aluminum alloy monofilament with the diameter of 4mm after 8-pass drawing, keeping the temperature at 175 ℃ for 10h to obtain the aluminum-magnesium-silicon alloy monofilament, wherein the electric conductivity of the monofilament is 56.2 percent IACS (20 ℃), the tensile strength is 307MPa, and the elongation is 3.2 percent.
Example 2
An aluminum-magnesium-silicon alloy monofilament comprises the following components in percentage by mass:
| element(s) | Magnesium alloy | Silicon | Erbium (erbium) | Lanthanum (cerium) | Boron | Vanadium + titanium + chromium + manganese | Aluminium |
| Mass fraction/wt. -%) | 0.70 | 0.50 | 0.40 | 0.05 | 0.015 | 0.008 | Balance of |
Adding an electrician pure aluminum ingot with the purity of 99.7% into a smelting furnace, wherein the smelting temperature is 750 ℃; after the pure aluminum is completely melted, adding the aluminum-cerium intermediate alloy and the aluminum-boron intermediate alloy at 730 ℃, fully stirring after the pure aluminum is completely melted, and standing for 50 min; pouring the upper aluminum liquid of the smelting furnace 4/5 into another heat preservation furnace, adding pure magnesium, aluminum-silicon intermediate alloy and aluminum-erbium intermediate alloy at 750 ℃, stirring for 10min after complete melting, and standing for 20 min. So that their final contents are as indicated above. Blowing 0.5-0.8 MPa nitrogen for 10min at 720 ℃, standing for 30min, and slagging off. An aluminum alloy liquid was poured into a metal mold at 710 ℃ to obtain an ingot of 22X 200 mm. The cast ingot is kept at 520 ℃ for 1.5h, rolled into an aluminum alloy round rod with the diameter of 9.5mm, and then rapidly quenched by water. After 10 passes of drawing, the phi 3.5mm aluminum alloy monofilament is obtained and is kept at 185 ℃ for 8h, the conductivity of the monofilament is 56% IACS (20 ℃), the tensile strength is 311MPa, and the elongation is 3.0%.
Example 3
An aluminum-magnesium-silicon alloy monofilament comprises the following components in percentage by mass:
| element(s) | Magnesium alloy | Silicon | Erbium (erbium) | Lanthanum (cerium) | Boron | Vanadium + titanium + chromium + manganese | Aluminium |
| Mass fraction/wt. -%) | 0.60 | 0.40 | 0.30 | 0.04 | 0.02 | 0.007 | Balance of |
Adding an electrician pure aluminum ingot with the purity of 99.7% into a smelting furnace, and smelting at the temperature of 740 ℃; after the pure aluminum is completely melted, adding lanthanum-cerium mixed rare earth and simultaneously adding aluminum-boron intermediate alloy at 735 ℃, fully stirring after the pure aluminum is completely melted, and standing for 50 min; pouring the upper aluminum liquid of the smelting furnace 4/5 into another heat preservation furnace, adding pure magnesium, aluminum-silicon intermediate alloy and aluminum-erbium intermediate alloy at 740 ℃, stirring for 15min after complete melting, and standing for 20 min. So that their final contents are as indicated above. Blowing 0.5-0.8 MPa nitrogen for 15min at 730 ℃, standing for 25min, and slagging off. An aluminum alloy liquid was poured into a metal mold at 720 ℃ to obtain an ingot of 22X 200 mm. Keeping the temperature of the cast ingot at 530 ℃ for 1h, rolling the cast ingot into an aluminum alloy round rod with the diameter of 9.5mm, and then rapidly quenching the aluminum alloy round rod with water. After 12 passes of drawing, the phi 3.0mm aluminum alloy monofilament is obtained and is then kept at 190 ℃ for 6h, the conductivity of the monofilament is 56.1 percent IACS (20 ℃), the tensile strength is 308MPa, and the elongation is 3.2 percent.
Example 4
An aluminum-magnesium-silicon alloy monofilament comprises the following components in percentage by weight:
| element(s) | Magnesium alloy | Silicon | Erbium (erbium) | Lanthanum (cerium) | Boron | Vanadium + titanium + chromium + manganese | Aluminium |
| Mass fraction/wt. -%) | 0.65 | 0.35 | 0.35 | 0.02 | 0.02 | 0.006 | Balance of |
Adding an electrician pure aluminum ingot with the purity of 99.7% into a smelting furnace, and smelting at the temperature of 740 ℃; after the pure aluminum is completely melted, adding lanthanum-cerium mixed rare earth and simultaneously adding aluminum-boron intermediate alloy at 735 ℃, fully stirring after the pure aluminum is completely melted, and standing for 50 min; pouring the upper aluminum liquid of the smelting furnace 4/5 into another heat preservation furnace, adding pure magnesium, aluminum-silicon intermediate alloy and aluminum-erbium intermediate alloy at 740 ℃, stirring for 15min after complete melting, and standing for 20 min. So that their final contents are as indicated above. Blowing nitrogen with the pressure of 0.5-0.8 MPa for 15min at 730 ℃, standing for 25min, and then slagging off. An aluminum alloy liquid was poured into a metal mold at 720 ℃ to obtain an ingot of 22X 200 mm. Keeping the temperature of the cast ingot at 530 ℃ for 1h, rolling the cast ingot into an aluminum alloy round rod with the diameter of 9.5mm, and then rapidly quenching the aluminum alloy round rod with water. After 11 passes of drawing, the phi 3.2mm aluminum alloy monofilament is obtained and is then insulated at 180 ℃ for 9 hours, the conductivity of the monofilament is 56.2% IACS (20 ℃), the tensile strength is 305MPa, and the elongation is 3.1%.
Example 5
An aluminum-magnesium-silicon alloy monofilament comprises the following components in percentage by weight:
adding an electrician pure aluminum ingot with the purity of 99.7% into a smelting furnace, wherein the smelting temperature is 750 ℃; after the pure aluminum is completely melted, adding the aluminum-lanthanum intermediate alloy and the aluminum-boron intermediate alloy at 740 ℃, fully stirring after the pure aluminum is completely melted, and standing for 45 min; pouring the upper aluminum liquid of the smelting furnace 4/5 into another heat preservation furnace, adding pure magnesium, aluminum-silicon intermediate alloy and aluminum-erbium intermediate alloy at 750 ℃, stirring for 15min after complete melting, and standing for 15min to ensure that the final contents are as shown above. Blowing nitrogen gas with the pressure of 0.5-0.8 MPa for 10min at the temperature of 20 ℃, standing for 30min, and then slagging off. An aluminum alloy liquid was poured into a metal mold at 710 ℃ to obtain an ingot of 22X 200 mm. Keeping the temperature of the cast ingot at 515 ℃ for 2h, rolling the cast ingot into an aluminum alloy round rod with the diameter of 9.5mm, and then rapidly quenching the aluminum alloy round rod with water. After 9 passes of drawing, the aluminum alloy monofilament with the diameter of 3.7mm is obtained, the temperature is kept for 8 hours at 185 ℃, the conductivity of the monofilament is 56.1 percent IACS (20 ℃), the tensile strength is 301MPa, and the elongation is 3.3 percent.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions are executed on the computer or other programmable apparatus.
Claims (10)
1. An aluminum-magnesium-silicon alloy monofilament characterized by comprising the following components in mass percent:
0.50-0.70% of magnesium, 0.30-0.50% of silicon, 0.30-0.50% of erbium, 0-0.08% of lanthanum (cerium), 0.01-0.02% of boron, less than or equal to 0.01% of impurity elements of vanadium, titanium, chromium and manganese, and the balance of aluminum and inevitable impurities.
2. An aluminum-magnesium-silicon alloy monofilament as claimed in claim 1, wherein: 0.30 to 0.50% of erbium, 0 to 0.08% of lanthanum (cerium) and 0.01 to 0.02% of boron.
3. The aluminum-magnesium-silicon alloy monofilament as claimed in claim 1, wherein the monofilament is prepared by a process comprising:
smelting the aluminum ingot with the purity higher than a preset purity threshold in a smelting furnace at 730-750 ℃;
adding an aluminum-lanthanum intermediate alloy, an aluminum-cerium intermediate alloy or lanthanum-cerium mischmetal into the melt at 730-740 ℃, adding an aluminum-boron intermediate alloy, melting, and standing for the first time to remove impurities;
adding pure magnesium, an aluminum-silicon intermediate alloy and an aluminum-erbium intermediate alloy into the solution subjected to standing impurity removal at 730-750 ℃, melting, stirring and standing for the second time to remove impurities;
blowing nitrogen with the pressure of 0.5-0.8 MPa into the melt at the temperature of 710-730 ℃, standing for a third time and slagging off;
pouring the melt at 700-720 ℃ into a metal mold to obtain an ingot;
rolling or extruding the ingot which is kept at 510-530 ℃ for 1-2 h into a rod material with the diameter of 9.5mm, and performing water quenching and wire drawing.
4. An Al-Mg-Si alloy monofilament as claimed in claim 3,
and the ingot casting rolling is continuous casting and rolling, wherein the continuous casting and rolling comprises the steps of rolling the melt obtained by slagging off at the rolling temperature of 510-530 ℃, the finishing rolling temperature of not less than 400 ℃, cooling by using a cooling liquid, and discharging the rod at the temperature of 90-100 ℃ to obtain the rod material.
5. The aluminum-magnesium-silicon alloy monofilament as claimed in claim 3, wherein the extrusion comprises extruding an ingot obtained by casting the melt after slagging-off at 510-530 ℃ to be extruded at a temperature of not less than 400 ℃, cooling the cooling liquid, and taking out the rod at 90-100 ℃ to obtain the rod material.
6. An Al-Mg-Si alloy monofilament as claimed in claim 4 or 5,
drawing the rod material for 8-12 times to obtain a phi 3-4 mm monofilament; and
and aging the monofilament at 175-190 ℃ for 6-10 h to obtain the aluminum-magnesium-silicon alloy monofilament.
7. An Al-Mg-Si alloy monofilament as claimed in claim 3,
the standing for the first time for impurity removal comprises the following steps: standing for 40-60 min, and pouring 4/5 of the solution into another holding furnace from the upper part of the smelting furnace to obtain a solution subjected to standing and impurity removal.
8. An Al-Mg-Si alloy monofilament as claimed in claim 3,
the second time is 15-20 min; the third time is 20-30 min.
9. An Al-Mg-Si alloy monofilament as claimed in claim 3,
the stirring time and the nitrogen blowing time are both 10-15 min.
10. A preparation method of an aluminum-magnesium-silicon alloy monofilament is characterized by comprising the following steps:
smelting the aluminum ingot with the purity higher than a preset purity threshold in a smelting furnace at 730-750 ℃;
adding an aluminum-lanthanum intermediate alloy, an aluminum-cerium intermediate alloy or lanthanum-cerium mischmetal into the melt at 730-740 ℃, adding an aluminum-boron intermediate alloy, melting, and standing for the first time to remove impurities;
adding pure magnesium, an aluminum-silicon intermediate alloy and an aluminum-erbium intermediate alloy into the solution subjected to standing impurity removal at 730-750 ℃, melting, stirring and standing for the second time to remove impurities;
blowing nitrogen with the pressure of 0.5-0.8 MPa into the melt at the temperature of 710-730 ℃, standing for a third time and slagging off;
pouring the melt at 700-720 ℃ into a metal mold to obtain an ingot;
rolling or extruding the cast ingot which is kept at 510-530 ℃ for 1-2 h
The rod material is water quenched and drawn to obtain the aluminum-magnesium-silicon alloy monofilament with the following components: 0.50-0.70% of magnesium, 0.30-0.50% of silicon, 0.30-0.50% of erbium, 0-0.08% of lanthanum (cerium), 0.01-0.02% of boron, less than or equal to 0.01% of impurity elements of vanadium, titanium, chromium and manganese, and the balance of aluminum and inevitable impurities.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112662923A (en) * | 2020-11-30 | 2021-04-16 | 湖南稀土金属材料研究院 | Aluminum alloy conductor and preparation method thereof |
| CN113373353A (en) * | 2021-04-29 | 2021-09-10 | 百色市广百金属材料有限公司 | Erbium-containing aluminum-magnesium alloy wire and production method thereof |
| CN114507797A (en) * | 2020-11-17 | 2022-05-17 | 中国科学院金属研究所 | High-strength high-conductivity aluminum alloy material and preparation method thereof |
| CN114875282A (en) * | 2022-05-24 | 2022-08-09 | 国网智能电网研究院有限公司 | High-strength aluminum alloy monofilament material and preparation method and application thereof |
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2020
- 2020-06-05 CN CN202010504114.5A patent/CN111826558A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114507797A (en) * | 2020-11-17 | 2022-05-17 | 中国科学院金属研究所 | High-strength high-conductivity aluminum alloy material and preparation method thereof |
| CN112662923A (en) * | 2020-11-30 | 2021-04-16 | 湖南稀土金属材料研究院 | Aluminum alloy conductor and preparation method thereof |
| CN112662923B (en) * | 2020-11-30 | 2022-06-03 | 湖南稀土金属材料研究院 | Aluminum alloy conductor and preparation method thereof |
| CN113373353A (en) * | 2021-04-29 | 2021-09-10 | 百色市广百金属材料有限公司 | Erbium-containing aluminum-magnesium alloy wire and production method thereof |
| CN114875282A (en) * | 2022-05-24 | 2022-08-09 | 国网智能电网研究院有限公司 | High-strength aluminum alloy monofilament material and preparation method and application thereof |
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