CN117612792A - High-conductivity heat-resistant semi-hard aluminum wire and manufacturing method thereof - Google Patents
High-conductivity heat-resistant semi-hard aluminum wire and manufacturing method thereof Download PDFInfo
- Publication number
- CN117612792A CN117612792A CN202311569480.9A CN202311569480A CN117612792A CN 117612792 A CN117612792 A CN 117612792A CN 202311569480 A CN202311569480 A CN 202311569480A CN 117612792 A CN117612792 A CN 117612792A
- Authority
- CN
- China
- Prior art keywords
- less
- equal
- aluminum
- conductivity
- aluminum wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 135
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 132
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 42
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- 238000007670 refining Methods 0.000 claims abstract description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002245 particle Substances 0.000 claims abstract description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000004321 preservation Methods 0.000 claims description 25
- 238000003723 Smelting Methods 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000005271 boronizing Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 8
- 230000032683 aging Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 229910004261 CaF 2 Inorganic materials 0.000 claims description 5
- 238000010622 cold drawing Methods 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 claims description 5
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 12
- 239000012535 impurity Substances 0.000 abstract description 11
- 239000004020 conductor Substances 0.000 abstract description 9
- 229910052796 boron Inorganic materials 0.000 abstract description 8
- 239000013078 crystal Substances 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 abstract 2
- 229910000737 Duralumin Inorganic materials 0.000 abstract 1
- 238000002425 crystallisation Methods 0.000 abstract 1
- 230000008025 crystallization Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 30
- 229910000838 Al alloy Inorganic materials 0.000 description 21
- 238000003756 stirring Methods 0.000 description 15
- 238000005266 casting Methods 0.000 description 10
- 238000005096 rolling process Methods 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- 238000010183 spectrum analysis Methods 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 231100001261 hazardous Toxicity 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Conductive Materials (AREA)
Abstract
The invention discloses a high-conductivity heat-resistant semi-hard aluminum wire and a manufacturing method thereof, wherein Si is less than or equal to 0.04wt%, fe is less than or equal to 0.11wt% and less than or equal to 0.15wt%, zn is less than or equal to 0.05wt% and less than or equal to 0.15wt%, cr+V+Mn+Ti is less than or equal to 0.006wt%, Y is less than or equal to 0.10wt% and less than or equal to 0.30wt%, B is less than or equal to 0.007wt% and less than or equal to 0.025wt%, and the balance is Al, wherein the diameter or equivalent diameter of aluminum wires for stranding is 2.5-4.8 mm, the conductivity is not less than 63.3% IACS, the tensile strength is 100-135 MPa, and the elongation is more than or equal to 5%. According to the invention, by adding the Y and Fe elements, crystallization of an aluminum structure is effectively promoted, the low-melting-point environment-friendly molten particle refining agent is adopted for refining and purifying an aluminum solution, secondary oxidation in the refining process is avoided, introduction of impurities is greatly reduced, generation of crystal nuclei, crystal boundaries and air holes is reduced by controlling cooling speed and nitrogen protection, and the components of a duralumin conductor and the forming process are precisely controlled in the forming process of the aluminum structure, so that conductivity, tensile strength and elongation of the material are effectively improved, and the material is more suitable for extreme occasions such as high-voltage transmission and the like compared with the existing material.
Description
Technical Field
The invention relates to a high-conductivity heat-resistant semi-hard aluminum wire and a manufacturing method thereof, belonging to the technical field of cables.
Background
Along with the gradual strictness of energy-saving and environment-friendly requirements, the energy-saving requirements on the wires in the field of high-voltage transmission are increasingly increased, and the wires with low loss and high safety and reliability are required to be adopted. The conventional transportation wires are common steel-cored heat-resistant aluminum alloy stranded wires, steel-cored high-conductivity heat-resistant aluminum alloy stranded wires and steel-cored soft aluminum stranded wires, but the common steel-cored heat-resistant aluminum alloy stranded wires have low conductivity, only 60% IACS, high power transmission line loss and do not meet the energy-saving and environment-friendly requirements; the steel-cored high-conductivity heat-resistant aluminum alloy stranded wire has the conductivity of only 61.5% -62.0% IACS, the production process is immature, the cost is too high, and the large-scale application is not facilitated; the conductivity of the steel-cored soft aluminum stranded wire is higher and can reach more than 63% IACS, but the tensile strength and the wear resistance are insufficient, so that potential safety hazards exist in the laying and application processes, and the steel-cored soft aluminum stranded wire cannot be applied on a large scale.
At present, the research and development of the high-conductivity heat-resistant semi-hard aluminum wire is an industrial key point, the wire has excellent conductive performance and high temperature resistance, the conductive rate of the wire can reach 63.3 percent IACS, the tensile strength can reach 100-135 MPa, the elongation is more than or equal to 5 percent, the heat-resistant temperature is more than or equal to 150 ℃, and how to prepare the material is still a key technical problem faced by the industry.
Disclosure of Invention
The invention aims to provide a high-conductivity heat-resistant semi-hard aluminum wire and a manufacturing method thereof.
The preparation method of the high-conductivity heat-resistant semi-hard aluminum wire comprises the following steps of:
s1, smelting a high-purity aluminum ingot and performing boride treatment;
s2, adding Y, fe alloy ingots;
s3, refining;
s4, component adjustment and element proportion control;
s5, standing, preserving heat and pouring into a strip-shaped cast ingot;
s6, preparing aluminum wires by cold drawing;
s7, performing high-temperature treatment on the aluminum wire;
and S8, twisting the aluminum wires and the extra-strong steel core.
In the preparation method, the Y and Fe elements are added and act together, so that the performance of the material can be effectively improved. The addition of the Y element not only can refine grains, but also can form beneficial compounds with the impurity element, thereby reducing the solid solubility of the impurity element and further improving the strength and the conductivity of the material. The addition of Fe element helps to improve the strength, heat resistance and creep resistance of the material. When Y and Fe are combined, Y can form stable phase with Fe and form strengthening effect at the interface and grain boundary of crystal, so that the average size of grain boundary compound is reduced from 50-200 μm to 20-70 μm, thereby further enhancing the mechanical property and conductivity of the material.
Further, in the S1 smelting and boronizing process, alB is adopted in the boronizing process 10 And the temperature of the heat preservation furnace is 740-750 ℃ and the heat preservation time is 30-35 min, so as to promote impurity precipitation, refine alloy grains and promote the overall uniformity of the alloy.
Furthermore, an environment-friendly molten particle refining agent and a high-efficiency sodium-free covering agent are adopted in the S3 refining link, so that the melting point of the refining agent is low, secondary oxidation is avoided in the refining process, more than 95% of impurities in the aluminum melt can be effectively removed, and the impurities in the aluminum melt are reduced. And the generated gas is less, so that the generation of air holes is reduced, the pinhole degree of the aluminum conductor reaches more than 1 level, the density of the product is further improved, the phenomenon that a current flow path is blocked due to the air holes is reduced, the continuity and uniformity of the aluminum alloy are prevented from being damaged by the air holes, and the contact performance of atoms between aluminum conductors is improved, so that the strength and the electric conductivity of the aluminum conductor are better.
In the environment-friendly melting type particle refining agent, the average diameter is 1-3mm, and the component composition is MgCl 2 、KCl、CaF 2 And K 2 CO 3 Is mixed with MgCl as effective covering agent 2 And the performance in the aspect of pinhole degree is better in KCl.
Further, the component adjusting step in S4 controls the element proportion to be less than or equal to 0.04wt% of Si, less than or equal to 0.13wt% of Fe, less than or equal to 0.18wt% of Zn, less than or equal to 0.07wt% of Zn, less than or equal to 0.17wt% of (Cr+V+Mn+Ti), less than or equal to 0.006wt%, less than or equal to 0.10wt% of Y, less than or equal to 0.007wt% of B, less than or equal to 0.025wt% of B, and the balance of Al.
The step is used for precisely controlling the hazardous element Cr, V, mn, ti, and purifying the aluminum solution by matching with the boride treatment process in the step S2, so that the content of the hazardous element Cr+V+Mn+Ti can be efficiently reduced from 150-250PPm to 20-60PPm before impurity removal. The tensile strength and the plastic elongation of the high-conductivity semi-hard aluminum wire are effectively improved by 5 percent.
Further, in the process of standing, preserving heat and pouring S5, the heat preservation temperature is 740-750 ℃, the time is 30-35 min, the pouring temperature of molten aluminum is 700-710 ℃, in the pouring process, a sealing runner is adopted and nitrogen protection is carried out, the nitrogen flow is controlled to be big at first and small at second, and independent temperature control devices are uniformly arranged on the sealing runner at intervals, and the cooling speed is uniformly controlled according to the length of the sealing runner. The process can effectively control the cooling speed of the aluminum solution, and prevent the generation of crystal nucleus, crystal boundary and air hole caused by the different internal and external solidification speeds due to the too fast cooling; the adoption of the process can lead the tensile strength of the prepared aluminum rod to be more than or equal to 125MPa, and the conductor resistivity to be less than or equal to 0.027350 Ω & mm at 20 DEG C 2 /m。
The technical production verifies that when the distance is set to be 2m, each technical parameter of the aluminum rod is better.
Further, the high-temperature treatment of the aluminum wire in the step S7 is aging treatment, the temperature is 255-260 ℃, the temperature fluctuation is +/-3 ℃, the heat preservation time is 5-6 h, and the control parameters are as follows: the conductivity is controlled to be more than or equal to 63.3 percent IACS, the tensile strength is 100-135 MPa, the elongation is more than or equal to 5 percent, and the strength retention rate after heat preservation for 1h at 230 ℃ is not less than 95 percent of the initial measured value at room temperature.
By adopting the ageing parameters, various defects generated in the drawing process can be effectively reduced and eliminated, and phenomena such as dislocation, lattice distortion and the like caused by drawing are reduced.
At 20 ℃, the conductor resistance is less than or equal to 0.027151 Ω -mm 2 /m。
Further, in the stranding step of the step S8, the tensile strength of the extra-strong steel core is not less than 2100MPa, and at the moment, the ground tensile strength of the high-conductivity heat-resistant semi-hard aluminum wire can be ensured to be 100-135 MPa, and the elongation is more than or equal to 5%.
The invention also provides a high-conductivity heat-resistant semi-hard aluminum wire which is prepared by adopting the preparation method, and the high-conductivity heat-resistant semi-hard aluminum wire is detected to contain less than or equal to 0.04wt% of Si, less than or equal to 0.11wt% of Fe, less than or equal to 0.15wt% of Zn, less than or equal to 0.05wt% of Zn, less than or equal to 0.15wt% of (Cr+V+Mn+Ti), less than or equal to 0.006wt% of (Cr+V+Ti), less than or equal to 0.10wt% of Y, less than or equal to 0.30wt% of B, less than or equal to 0.025wt% of B, and the balance of Al, wherein the diameter or equivalent diameter of the aluminum wire for stranding is 2.5-4.8 mm, the conductivity is not less than 63.3% IACS, the tensile strength is 100-135 MPa, and the elongation is more than or equal to 5%.
The section shape of the high-conductivity heat-resistant semi-hard aluminum wire is round, fan-shaped or tile-shaped, and is determined according to specific occasions to adapt to the use environment when the high-conductivity heat-resistant semi-hard aluminum wire is used.
By adopting the technical scheme, the invention has the following beneficial effects:
(1) By adding Y and Fe elements and allowing them to act together, the properties of the material can be effectively improved. The addition of the Y element not only can refine grains, but also can form beneficial compounds with the impurity element, thereby reducing the solid solubility of the impurity element and further improving the strength and the conductivity of the material. The addition of Fe element helps to improve the strength, heat resistance and creep resistance of the material. When Y and Fe are combined, Y can form stable phase with Fe and form strengthening effect at the interface and grain boundary of crystal, so that the average size of grain boundary compound is reduced from 50-200 μm to 20-70 μm, thereby further enhancing the mechanical property and conductivity of the material.
(2) The adopted refining agent has lower melting point, avoids secondary oxidation in the refining process, can effectively remove more than 95 percent of impurities in the aluminum melt, and reduces the impurities in the aluminum melt. And the generated gas is less, so that the generation of air holes is reduced, the pinhole degree of the aluminum conductor reaches more than 1 level, the density of the product is further improved, the phenomenon that a current flow path is blocked due to the air holes is reduced, the continuity and uniformity of the aluminum alloy are prevented from being damaged by the air holes, and the contact performance of atoms between aluminum conductors is improved, so that the strength and the electric conductivity of the aluminum conductor are better.
(3) The independent temperature control devices are arranged at intervals in the casting process and are protected by nitrogen, so that the cooling speed of the aluminum solution is effectively controlled, and the generation of crystal nucleus, crystal boundary and air hole caused by different internal and external solidification speeds due to too fast cooling is prevented.
(4) The invention also improves the overall strength of the wire by twisting with the extra-strong steel core, and obtains better performance parameters on the basis of high-conductivity heat-resistant semi-hard aluminum.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which
FIG. 1 is a photograph of a sample without temperature control.
FIG. 2 is a photograph of a sample with temperature control.
Detailed Description
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present invention, it should be understood that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate orientations or positional relationships based on those shown in the drawings, or those conventionally put in place when the inventive product is used, or those conventionally understood by those skilled in the art, merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
Example 1
The preparation method of the high-conductivity heat-resistant semi-hard aluminum wire comprises the following steps:
smelting electric aluminum, namely smelting high-purity aluminum ingots with Si of 0.03wt%, fe of 0.05wt%, zn of 0.06wt%, cr+V+Mn+Ti of 0.012wt% and Al content of 99.82wt% to obtain aluminum liquid;
carrying out boride treatment on the aluminum liquid, wherein the mass percentage of boron element is controlled to be B=0.025wt%;
sequentially adding AlFe into the obtained aluminum liquid 20 、AlY 10 Intermediate alloy ingot to prepare aluminum alloy liquid; stirring the aluminum alloy liquid by adopting an electromagnetic automatic stirrer;
after stirring, adding an environment-friendly molten particle refining agent and a high-efficiency sodium-free covering agent into the aluminum alloy liquid in a heat preservation furnace;
stirring the aluminum alloy liquid by adopting an electromagnetic automatic stirrer, and carrying out slag skimming treatment after stirring;
component adjustment, namely controlling the composition and the proportion of the aluminum liquid to be Si=0.03 wt%, fe=0.13 wt%, zn=0.06 wt%, (Cr+V+Mn+Ti) =0.003 wt%, Y=0.11 wt%, B=0.02 wt% and the balance of Al according to mass numbers through XRF spectrum analysis, element addition and boronizing treatment;
standing and preserving heat of the aluminum melt;
continuously casting the aluminum melt into a trapezoid cast ingot;
continuously rolling the trapezoid cast ingot into an aluminum rod;
through XRF spectrum analysis and component adjustment, the main elements of the control aluminum rod are as follows in percentage by mass: si=0.03 wt%, fe=0.11 wt%, zn=0.05 wt%, (cr+v+mn+ti) =0.003 wt%, y=0.10 wt%, b=0.018 wt%; the balance of Al;
making the aluminum rod into an aluminum wire through a cold drawing process;
carrying out high-temperature treatment on the aluminum wire;
and concentrically twisting the aluminum wire subjected to high-temperature treatment and the ultra-strong steel core together to form the high-conductivity heat-resistant semi-hard aluminum wire.
Further, the method comprises the steps of,
the smelting equipment is a smelting furnace, and the smelting temperature is 1000 ℃;
the boronizing treatment adopts AlB 10 The temperature of the heat preservation furnace is 740 ℃, and the heat preservation time is 35min;
refining temperature is 720 ℃; the temperature is 750 ℃ and the time is 35min.
Further, after the intermediate aluminum alloy liquid is stirred, the environment-friendly molten particle refining agent and the efficient sodium-free covering agent are prepared, wherein the average diameter of the environment-friendly molten particle refining agent is 3mm, and the components are MgCl 2 、KCl、CaF 2 And K 2 CO 3 After the slag removing treatment is completed by electromagnetic stirring again, coating a layer of high-efficiency covering agent which is MgCl on the surface of the aluminum liquid 2 、KCl。
Further, the casting temperature of the molten aluminum is 710 ℃, and the molten aluminum is continuously cast to form a trapezoid cast ingot, wherein the section of the trapezoid cast ingot is 1800mm 2 Continuously rolling into an aluminum rod, wherein the diameter of the aluminum rod is 9.5mm, and the mass percentages of main elements of the aluminum rod are controlled as follows: si=0.03 wt%, fe=0.11 wt%, zn=0.05 wt%, (cr+v+mn+ti) =0.003 wt%, y=0.10 wt%, b=0.018 wt%; the balance of Al; in the casting process, a sealing runner is adopted and nitrogen protection is carried out, the nitrogen flow is controlled to be big at first and small at second, and an independent temperature control device is arranged on the sealing runner every 2m, and the total number of the measurement points is 10.
The diameter of the aluminum wire is 3.85mm.
The high temperature treatment step adopts ageing treatment, the temperature is 255-260 ℃, the temperature fluctuation is +/-3 ℃, the heat preservation time is 5-6 h, and the control parameters are as follows: the conductivity is controlled to be more than or equal to 63.3 percent IACS, the tensile strength is 100-135 MPa, the elongation is more than or equal to 5 percent, and the strength retention rate after heat preservation for 1h at 230 ℃ is not less than 95 percent of the initial measured value at room temperature.
The tensile strength of the extra-strong steel core is not less than 2100MPa.
The high-conductivity heat-resistant semi-hard aluminum wire prepared in this example had si=0.03 wt%, fe=0.11 wt%, zn=0.05 wt%, (cr+v+mn+ti) =0.003 wt%, y=0.10 wt%, b=0.018 wt%, and the balance Al; the diameter or equivalent diameter of the aluminum wires for stranding is 3.21mm.
Example 2
Smelting electrical aluminum, namely smelting high-purity aluminum ingots with Si content of 0.02wt%, fe content of 0.04wt%, zn content of 0.08wt%, cr+V+Mn+Ti content of 0.010wt% and Al content of 99.84wt% to obtain aluminum liquid;
carrying out boride treatment on the aluminum liquid, wherein the mass percentage of boron element is controlled to be B=0.018 wt%;
sequentially adding AlFe into the obtained aluminum liquid 20 、AlY 10 Intermediate alloy ingot to prepare aluminum alloy liquid; stirring the aluminum alloy liquid by adopting an electromagnetic automatic stirrer;
after stirring, adding an environment-friendly molten particle refining agent and a high-efficiency sodium-free covering agent into the aluminum alloy liquid in a heat preservation furnace;
stirring the aluminum alloy liquid by adopting an electromagnetic automatic stirrer, and carrying out slag skimming treatment after stirring;
component adjustment, namely controlling the composition and the proportion of the aluminum liquid to be Si=0.02 wt%, fe=0.16 wt%, zn=0.08 wt%, (Cr+V+Mn+Ti) =0.005 wt%, Y=0.20 wt%, B=0.013 wt% and the balance of Al according to mass numbers through XRF spectrum analysis, element addition and boronizing treatment;
standing and preserving heat of the aluminum melt, and continuously casting the aluminum melt into a trapezoid cast ingot;
continuously rolling the trapezoid cast ingot into an aluminum rod;
through XRF spectrum analysis and component adjustment, the main elements of the control aluminum rod are as follows in percentage by mass: si=0.02 wt%, fe=0.13 wt%, zn=0.08 wt%, (cr+v+mn+ti) =0.005 wt%, y=0.20 wt%, b=0.012 wt%, the balance being Al;
making the aluminum rod into an aluminum wire through a cold drawing process;
carrying out high-temperature treatment on the aluminum wire;
and concentrically twisting the aluminum wire subjected to high-temperature treatment and the ultra-strong steel core together to form the high-conductivity heat-resistant semi-hard aluminum wire.
Wherein the smelting equipment is a smelting furnace, and the smelting temperature is 850 ℃;
AlB is adopted for the boronizing treatment 10 The temperature of the heat preservation furnace is 740 ℃, and the heat preservation time is 35min; refining temperature is 730 ℃; the temperature is 740 ℃ and the time is 35min.
After the intermediate aluminum alloy liquid is stirred, the environment-friendly molten particle refining agent and the high-efficiency sodium-free covering agent are prepared, wherein the average diameter of the environment-friendly molten particle refining agent is 3mm, and the components consist of MgCl 2 、KCl、CaF 2 And K 2 CO 3 After the slag removing treatment is completed by electromagnetic stirring again, coating a layer of high-efficiency covering agent which is MgCl on the surface of the aluminum liquid 2 、KCl。
In the embodiment, the casting temperature of the molten aluminum is 700 ℃, and the molten aluminum is continuously cast to form a trapezoid cast ingot, wherein the section of the trapezoid cast ingot is 1800mm 2 Continuously rolling into an aluminum rod, wherein the diameter of the aluminum rod is 9.5mm, and the mass percentages of main elements of the aluminum rod are controlled as follows: si=0.02 wt%, fe=0.13 wt%, zn=0.08 wt%, (cr+v+mn+ti) =0.005 wt%, y=0.20 wt%, b=0.012 wt%, the balance being Al; in the casting process, a sealing flow channel is adopted and nitrogen protection is carried out, the nitrogen flow is controlled to be big at first and small at second, and an independent temperature control device is arranged on the sealing flow channel every 2m and uniformly controls the cooling speed according to the length of the sealing flow channel.
The diameter of the aluminum wire is 3.50mm, the high-temperature treatment step adopts ageing treatment, the temperature is 260 ℃, the temperature fluctuation is +/-3 ℃, the heat preservation time is 5 hours, and the control parameters are as follows: the conductivity is controlled to be more than or equal to 63.3 percent IACS, the tensile strength is 135MPa, the elongation is more than or equal to 5 percent, and the strength retention rate after heat preservation for 1h at 230 ℃ is not less than 95 percent of the initial measurement value at room temperature.
The tensile strength of the extra-strong steel core is not less than 2100MPa.
The high-conductivity heat-resistant semi-hard aluminum wire composition in this embodiment is si=0.02 wt%, fe=0.13 wt%, zn=0.08 wt%, (cr+v+mn+ti) =0.005 wt%, y=0.20 wt%, b=0.012 wt%, and the balance Al; the diameter or equivalent diameter of the aluminum wires for stranding is 3.50mm.
Example 3
Smelting electric aluminum, namely smelting high-purity aluminum ingots with Si of 0.01wt%, fe of 0.02wt%, zn of 0.06wt%, cr+V+Mn+Ti of 0.008wt% and Al content of 99.89wt% to obtain aluminum liquid;
carrying out boride treatment on the aluminum liquid, wherein the mass percentage of boron element is controlled to be B=0.023 wt%;
sequentially adding AlFe into the obtained aluminum liquid 20 、AlY 10 Intermediate alloy ingot to prepare aluminum alloy liquid; stirring the aluminum alloy liquid by adopting an electromagnetic automatic stirrer;
after stirring, adding an environment-friendly molten particle refining agent and a high-efficiency sodium-free covering agent into the aluminum alloy liquid in a heat preservation furnace;
stirring the aluminum alloy liquid by adopting an electromagnetic automatic stirrer, and carrying out slag skimming treatment after stirring;
component adjustment: the composition and the proportion of the aluminum liquid are controlled to be Si=0.01 wt%, fe=0.18 wt%, zn=0.06 wt%, (Cr+V+Mn+Ti) =0.002 wt%, Y=0.30 wt%, B=0.019 wt% and the balance Al according to mass numbers through XRF spectrum analysis, element addition and boronizing treatment;
standing and preserving heat of the aluminum melt;
continuously casting into a trapezoid cast ingot by adopting the aluminum melt;
continuously rolling the trapezoid cast ingot into an aluminum rod;
through XRF spectrum analysis and component adjustment, the main elements of the control aluminum rod are as follows in percentage by mass: si=0.01 wt%, fe=0.15 wt%, zn=0.06 wt%, (cr+v+mn+ti) =0.003 wt%, y=0.30 wt%, b=0.017 wt%; the balance of Al;
making the aluminum rod into an aluminum wire through a cold drawing process; carrying out high-temperature treatment on the aluminum wire;
and concentrically twisting the aluminum wire subjected to high-temperature treatment and the ultra-strong steel core together to form the high-conductivity heat-resistant semi-hard aluminum wire.
Wherein the smelting equipment is a smelting furnace, and the smelting temperature is 1000 ℃;
AlB is adopted for the boronizing treatment 10 The temperature of the heat preservation furnace is 740 ℃, and the heat preservation time is 35min;
refining temperature is 740 ℃;
the temperature is 750 ℃ and the time is 35min.
In the process, after the intermediate aluminum alloy liquid is stirred, the environment-friendly molten particle refining agent and the high-efficiency sodium-free covering agent are used for environment-friendly meltingThe average diameter of the fused particle refining agent is 3mm, and the component composition is MgCl 2 、KCl、CaF 2 And K 2 CO 3 After the slag removing treatment is completed by electromagnetic stirring again, coating a layer of high-efficiency covering agent which is MgCl on the surface of the aluminum liquid 2 、KCl。
The casting temperature of the molten aluminum is 705 ℃, and the continuous casting is carried out to form a trapezoid cast ingot, wherein the section of the trapezoid cast ingot is 1800mm 2 Continuously rolling into an aluminum rod, wherein the diameter of the aluminum rod is 9.5mm, and the mass percentages of main elements of the aluminum rod are controlled as follows: the balance of Al; in the casting process, a sealing flow channel is adopted and nitrogen protection is carried out, the nitrogen flow is controlled to be big at first and small at second, and an independent temperature control device is arranged on the sealing flow channel every 2m and uniformly controls the cooling speed according to the length of the sealing flow channel.
In the wire drawing process, the diameter of the aluminum wire is 3.21mm.
Ageing treatment is adopted in the high-temperature treatment process of the aluminum wire, the temperature is 255-260 ℃, the temperature fluctuation is +/-3 ℃, the heat preservation time is 5-6 h, and the control parameters are as follows: the conductivity is controlled to be more than or equal to 63.3 percent IACS, the tensile strength is 100-135 MPa, the elongation is more than or equal to 5 percent, and the strength retention rate after heat preservation for 1h at 230 ℃ is not less than 95 percent of the initial measured value at room temperature.
The tensile strength of the extra-strong steel core in the stranding process is not less than 2100MPa.
The high-conductivity heat-resistant semi-hard aluminum wire comprises Si=0.01 wt%, fe=0.15 wt%, zn=0.06 wt%, (Cr+V+Mn+Ti) =0.003 wt%, Y=0.30 wt% and B=0.017 wt%; the balance of Al; the diameter or equivalent diameter of the aluminum wires for stranding is 3.85mm.
The high conductivity heat resistant semi-hard aluminum wire obtained in the examples was tested to obtain the following parameters:
table 1 example data comparison
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (10)
1. A preparation method of a high-conductivity heat-resistant semi-hard aluminum wire is characterized by comprising the following steps: the method comprises the following steps:
s1, smelting a high-purity aluminum ingot and performing boride treatment;
s2, adding Y, fe alloy ingots;
s3, refining;
s4, component adjustment and element proportion control;
s5, standing, preserving heat and pouring into a strip-shaped cast ingot;
s6, preparing aluminum wires by cold drawing;
s7, performing high-temperature treatment on the aluminum wire;
and S8, twisting the aluminum wires and the extra-strong steel core.
2. The method for manufacturing the high-conductivity heat-resistant semi-hard aluminum wire according to claim 1, wherein the method comprises the following steps: in the S1 smelting and boronizing process, alB is adopted in the boronizing process 10 The temperature of the heat preservation furnace is 740-750 ℃ and the heat preservation time is 30-35 min.
3. The method for manufacturing the high-conductivity heat-resistant semi-hard aluminum wire according to claim 1, wherein the method comprises the following steps: and S3, an environment-friendly melting type particle refining agent and a high-efficiency sodium-free covering agent are adopted in the refining link.
4. The method for manufacturing the high-conductivity heat-resistant semi-hard aluminum wire according to claim 1, wherein the method comprises the following steps: the component adjusting step in the S4 controls the element proportion to be less than or equal to 0.04wt% of Si, less than or equal to 0.13wt% of Fe, less than or equal to 0.18wt% of Zn, less than or equal to 0.07wt% of Zn, less than or equal to 0.17wt% of (Cr+V+Mn+Ti), less than or equal to 0.006wt%, less than or equal to 0.10wt% of Y, less than or equal to 0.30wt% of B, less than or equal to 0.007wt% of B, and the balance of Al.
5. The method for manufacturing the high-conductivity heat-resistant semi-hard aluminum wire according to claim 1, wherein the method comprises the following steps: in the process of standing, preserving heat and pouring in the step S5, the heat preservation temperature is 740-750 ℃, the time is 30-35 min, the pouring temperature of molten aluminum is 700-710 ℃, in the pouring process, a sealing runner is adopted and nitrogen protection is carried out, the nitrogen flow is controlled to be big at first and small at second, and independent temperature control devices are uniformly arranged on the sealing runner at intervals, and the cooling speed is uniformly controlled according to the length of the sealing runner.
6. The method for manufacturing the high-conductivity heat-resistant semi-hard aluminum wire according to claim 1, wherein the method comprises the following steps: the step S7 of high-temperature treatment of the aluminum wire is aging treatment, the temperature is 255-260 ℃, the temperature fluctuation is +/-3 ℃, the heat preservation time is 5-6 h, and the control parameters are as follows: the conductivity is controlled to be more than or equal to 63.3 percent IACS, the tensile strength is 100-135 MPa, the elongation is more than or equal to 5 percent, and the strength retention rate after heat preservation for 1h at 230 ℃ is not less than 95 percent of the initial measured value at room temperature.
7. A method for preparing a high conductivity heat resistant semi-hard aluminum wire according to claim 3, wherein: the average diameter of the environment-friendly melting type particle refining agent is 1-3mm, and the composition of the environment-friendly melting type particle refining agent is MgCl 2 、KCl、CaF 2 And K 2 CO 3 Is a mixture of (a) and (b); the high-efficiency covering agent is MgCl 2 、KCl。
8. The method for manufacturing the high-conductivity heat-resistant semi-hard aluminum wire according to claim 5, wherein the method comprises the following steps: the uniform spacing is set to 2m.
9. The method for manufacturing the high-conductivity heat-resistant semi-hard aluminum wire according to claim 1, wherein the method comprises the following steps: and in the stranding step of the step S8, the tensile strength of the extra-strong steel core is not less than 2100MPa.
10. A high conductivity heat resistant semi-hard aluminum wire, adopting the preparation method of any one of claims 1-9, characterized in that: the components are less than or equal to 0.04wt% of Si, less than or equal to 0.11wt% of Fe, less than or equal to 0.15wt% of Zn, less than or equal to 0.05wt% of Zn, less than or equal to 0.15wt% of (Cr+V+Mn+Ti), less than or equal to 0.10wt% of Y, less than or equal to 0.30wt% of B, less than or equal to 0.007wt% of B, less than or equal to 0.025wt% of Al, the balance of Al, the diameter or equivalent diameter of aluminum wires for stranding is 2.5-4.8 mm, the electric conductivity is not less than 63.3% IACS, the tensile strength is 100-135 MPa, and the elongation is not less than 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311569480.9A CN117612792A (en) | 2023-11-23 | 2023-11-23 | High-conductivity heat-resistant semi-hard aluminum wire and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311569480.9A CN117612792A (en) | 2023-11-23 | 2023-11-23 | High-conductivity heat-resistant semi-hard aluminum wire and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117612792A true CN117612792A (en) | 2024-02-27 |
Family
ID=89947453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311569480.9A Pending CN117612792A (en) | 2023-11-23 | 2023-11-23 | High-conductivity heat-resistant semi-hard aluminum wire and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117612792A (en) |
-
2023
- 2023-11-23 CN CN202311569480.9A patent/CN117612792A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101914708B (en) | Al-Fe-Cu alloy material and preparation method thereof | |
| CN102021442B (en) | Ultra-fine aluminum alloy wire and preparation method thereof | |
| CN105063433B (en) | A kind of high conductivity and heat heat resistance aluminium alloy monofilament and preparation method thereof | |
| CN101834012B (en) | High-conductivity hard aluminum wire and manufacture method thereof | |
| EP2468907A1 (en) | High-elongation rate aluminum alloy material for cable and preparation method thereof | |
| KR101790812B1 (en) | Cu-Ag ALLOY WIRE AND METHOD FOR PRODUCING Cu-Ag ALLOY WIRE | |
| CN101886198A (en) | High-conductivity aluminum alloy material for cable and preparation method thereof | |
| CN101880799A (en) | Al-Fe-Zn-Mg rare earth alloy wire and preparation method thereof | |
| CN102864344A (en) | Rare-earth aluminum alloy conductor for cable and manufacturing method thereof | |
| CN102127666B (en) | Preparation method of rare earth aluminum alloy conductor | |
| WO2020232990A1 (en) | Heat-resistant aluminum alloy having high conductivity, preparation method therefor and alloy aluminum rod used for overhead cables | |
| CN102766788A (en) | Preparation method of moderate strength Al-Mg-Si alloy rods and alloy wires through natural ageing treatment | |
| CN103667830A (en) | Al-Fe-Cu-RE aluminum alloy, preparation method thereof and aluminum alloy cable | |
| CN117612792A (en) | High-conductivity heat-resistant semi-hard aluminum wire and manufacturing method thereof | |
| CN109754912B (en) | Alloy cable and preparation method thereof | |
| CN110819853A (en) | High-conductivity soft aluminum monofilament and preparation method thereof | |
| CN113674890B (en) | High-conductivity heat-resistant aluminum alloy monofilament and preparation method thereof | |
| CN111074112B (en) | Aluminum alloy wire for preformed conductor splicing fitting and preparation method thereof | |
| CN112795808B (en) | Copper alloy wire and preparation method and application thereof | |
| CN108950295B (en) | Shielding type copper alloy wire and application thereof | |
| CN111979445B (en) | Rare earth microalloyed copper alloy and preparation method thereof | |
| CN110706841B (en) | High-strength high-conductivity aluminum alloy wire for electrician and manufacturing method thereof | |
| CN112111676B (en) | High-performance rare earth aluminum alloy conductor and preparation method thereof | |
| CN114944253B (en) | Preparation method of 63.5% IACS (aluminum alloy conductor) high-conductivity hard aluminum conductor and conductor | |
| CN110643843A (en) | Soft aluminum wire and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |