CN115732116A - A1-Fe-Zn-Mg-Mn series aluminum alloy for coal mine cable and aluminum alloy cable - Google Patents
A1-Fe-Zn-Mg-Mn series aluminum alloy for coal mine cable and aluminum alloy cable Download PDFInfo
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- CN115732116A CN115732116A CN202211460356.4A CN202211460356A CN115732116A CN 115732116 A CN115732116 A CN 115732116A CN 202211460356 A CN202211460356 A CN 202211460356A CN 115732116 A CN115732116 A CN 115732116A
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Abstract
The invention discloses an A1-Fe-Zn-Mg-Mn series aluminum alloy for a coal mine cable and an aluminum alloy cable, wherein the aluminum alloy comprises the following components in percentage by weight: fe:0.3 to 1.3 percent; mg:0.02-0.6%; mn:0.02-0.6%; ti:0 to 0.15 percent; cr:0 to 0.3 percent; zn:0 to 0.4 percent; the balance of A1 and impurities; si:0 to 0.3 percent; the aluminum alloy cable is prepared by the following steps of (1) continuously casting and continuously rolling; (2) a wire drawing process; (3) a wire stranding process; (4) annealing process; (5) an aluminum alloy sheath processing technology; (6) a cabling process; and (7) a detection process before delivery. Compared with the prior art, the invention has the advantages that: the composite material has the advantages of low cost, flexibility, sufficient raw materials and good fireproof, waterproof and insulating properties, and is suitable for the urgent need of the current power grid construction development.
Description
Technical Field
The invention relates to the technical field of cables, in particular to an A1-Fe-Zn-Mg-Mn aluminum alloy for a coal mine cable and an aluminum alloy cable.
Background
The coal mine cable has the advantages of complex use environment, severe working conditions, frequent movement, short service life and dangerous gas accumulation area, so that the cable has high requirements on the safety of the cable and the abrasion resistance and external tension resistance of the cable for frequent movement. Therefore, the cable for the coal mine belongs to a product with higher technical content in the cable industry.
The cable adopts copper core wires, and along with the excessive exploitation of copper resources, the copper resources are increasingly tense and endanger the shortage, so that the requirements of the market can be met only by replacing the copper core wires with wires made of other materials. Among metal materials, aluminum has characteristics of good conductive effect, light weight, low price, and the like, and in recent years, due to the enhancement of environmental awareness, weight reduction is strongly required to improve the utilization rate of mechanical fuel, so that it has been a great tendency to replace copper-core cables with aluminum-core cables. In the prior art, aluminum core cables are developed, but the common aluminum core cables have the defects of poor mechanical property, poor corrosion resistance and the like, and do not have good bending property which can meet the requirement of frequent movement of cables for coal mines; according to the severe environment of the cable for the coal mine, the cable has higher requirements on the conductivity and the mechanical strength of a cable conductor, and the conductivity and the mechanical strength of the conventional common aluminum core cable cannot meet the requirements of the cable for the coal mine. Therefore, the aluminum alloy cable capable of meeting the use requirements in the coal mining industry has a very wide market prospect.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the technical defects and provides an A1-Fe-Zn-Mg-Mn series aluminum alloy for a coal mine cable and an aluminum alloy cable.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: A1-Fe-Zn-Mg-Mn aluminum alloy for coal mine cables comprises the following components in percentage by weight:
Fe：0.3-1.3％；
Mg：0.02-0.6％；
Mn：0.02-0.6％；
Ti：0-0.15％；
Cr：0-0.3％；
Zn：0-0.4％；
Si：0-0.3％；
the balance of A1 and impurities;
the aluminum alloy has a resistivity of 0.028264 [ omega ] mm/m or less, an electrical conductivity of 61% or more IACS, an elongation at break of 10% or more, and a number of 90-degree fatigue bending of 30 or more.
As an improvement, the aluminum alloy also comprises rare earth elements, and the content of the rare earth elements accounts for 0.1-0.25% of the total weight of the aluminum alloy.
An aluminum alloy cable for coal mines is prepared by the following steps,
(1) Continuous casting and rolling: adding alloy elements such as rare earth and the like into the aluminum alloy during smelting to obtain an aluminum alloy solution, cleaning and standing the aluminum alloy solution, placing the aluminum alloy solution into a continuous casting machine for casting, trimming the cast blank, and then feeding the trimmed blank into a continuous rolling machine for rolling into an aluminum alloy rod;
(2) A wire drawing process: reducing the section of the aluminum alloy rod obtained in the step (1) by a wire drawing process to increase the length of a conductor, wherein the aluminum alloy rod needs to be subjected to three procedures of large drawing, middle drawing and micro drawing, the aluminum alloy rod is drawn into a required aluminum monofilament by the large drawing, the aluminum monofilament is further drawn into a required thinner aluminum monofilament by the middle drawing, and finally the thinner aluminum monofilament is further drawn into a required micro aluminum monofilament by the micro drawing;
(3) A wire stranding process: arranging and combining the drawn aluminum monofilaments in the step (2) according to a certain rule, and stranding the aluminum monofilaments into conductor wire bundles through a wire stranding machine process;
(4) Annealing process: the conductor wire bundle stranded in the step (3) is subjected to an annealing process to improve the mechanical property of the product;
(5) The processing technology of the aluminum alloy sheath comprises the following steps: manufacturing a plurality of aluminum alloy sheaths in a machining mode, wherein the size of the inner wall of each aluminum alloy sheath is matched with the size of the cable core to be wrapped;
(6) A cabling process: extruding, insulating, cabling, extruding a sheath or armoring the conductor wire harness annealed in the step (4) to prepare an aluminum alloy cable;
(7) The detection process before delivery: and (5) performing 1000 times of thermal cycle detection before cabling leaves a factory.
Compared with the prior art, the invention has the advantages that:
the aluminum alloy cable for the coal mine has good conductivity, tensile property, creep resistance and fatigue resistance, and particularly the bending resistance meets the technical requirements of a copper core for the coal mine; meanwhile, the aluminum alloy cable for the coal mine has good flexibility and much lighter weight than copper, so that the aluminum alloy cable is more convenient to use as a flexible cable for the coal mine, the cost of the cable for the coal mine is effectively reduced, and the working efficiency is improved.
Detailed Description
In order to make the content of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.
Example 1
A1-Fe-Zn-Mg-Mn aluminum alloy for coal mine cables comprises the following components in percentage by weight:
Fe：0.4％；
Mg：0.3％；
Mn：0.3％；
Ti：0.02％；
Cr：0.02％；
Zn：0.1％；
Si：0.05％；
the balance of A1 and impurities;
the aluminum alloy has a resistivity of 0.028264 [ omega ] mm/m or less, an electric conductivity of 61% or more of IACS, an elongation at break of not less than 10%, and the number of times of 90-degree fatigue bending of 30 or more.
In one embodiment, the aluminum alloy further includes a rare earth element in an amount of 0.1 to 0.25% by weight of the total composition of the aluminum alloy.
An aluminum alloy cable for coal mines is prepared by the following steps,
(1) Continuous casting and rolling: adding alloy elements such as rare earth and the like into the aluminum alloy of any one of claims 1 to 2 during smelting to obtain an aluminum alloy solution, cleaning and standing the aluminum alloy solution, placing the aluminum alloy solution into a continuous casting machine for casting, trimming the cast blank, and then rolling the trimmed blank into an aluminum alloy rod in a continuous rolling machine;
(2) The wire drawing process comprises the following steps: reducing the section of the aluminum alloy rod obtained in the step (1) by a wire drawing process to increase the length of a conductor, wherein the aluminum alloy rod needs to be subjected to three procedures of large drawing, middle drawing and micro drawing, the aluminum alloy rod is drawn into a required aluminum monofilament by the large drawing, the aluminum monofilament is further drawn into a required thinner aluminum monofilament by the middle drawing, and finally the thinner aluminum monofilament is further drawn into a required micro aluminum monofilament by the micro drawing;
(3) A wire stranding process: arranging and combining the drawn aluminum monofilaments according to a certain rule, and stranding the aluminum monofilaments into conductor wire bundles by a stranding machine process;
(4) And (3) annealing process: the conductor wire bundle stranded in the step (3) is subjected to an annealing process to improve the mechanical property of the product;
(5) The processing technology of the aluminum alloy sheath comprises the following steps: manufacturing a plurality of aluminum alloy sheaths in a machining mode, wherein the size of the inner wall of each aluminum alloy sheath is matched with the size of the cable core to be wrapped;
(6) A cabling process: extruding, insulating, cabling, extruding a sheath or armoring the conductor wire harness annealed in the step (4) to prepare an aluminum alloy cable;
(7) The detection process before delivery: and (5) carrying out 1000 times of thermal cycle detection before cabling leaves a factory.
Example 2
A1-Fe-Zn-Mg-Mn aluminum alloy for coal mine cables comprises the following components in percentage by weight:
Fe：0.9％；
Mg：0.2％；
Mn：0.2％；
Ti：0.08％；
Cr：0.2％；
Zn：0.2％；
Si：0.15％；
the balance of A1 and impurities;
the aluminum alloy has a resistivity of 0.028264 [ omega ] mm/m or less, an electrical conductivity of 61% or more IACS, an elongation at break of 10% or more, and a number of 90-degree fatigue bending of 30 or more.
In one embodiment, the aluminum alloy further includes a rare earth element in an amount of 0.1 to 0.25% by weight of the total composition of the aluminum alloy.
An aluminum alloy cable for coal mines is prepared by the following steps,
(1) Continuous casting and rolling: adding alloy elements such as rare earth and the like into the aluminum alloy of any one of claims 1 to 2 during smelting to obtain an aluminum alloy solution, cleaning and standing the aluminum alloy solution, placing the aluminum alloy solution into a continuous casting machine for casting, trimming the cast blank, and then rolling the trimmed blank into an aluminum alloy rod in a continuous rolling machine;
(2) The wire drawing process comprises the following steps: reducing the section of the aluminum alloy rod obtained in the step (1) by a wire drawing process to increase the length of a conductor, wherein the aluminum alloy rod needs to be subjected to three procedures of large drawing, middle drawing and micro drawing, the aluminum alloy rod is drawn into a required aluminum monofilament by the large drawing, the aluminum monofilament is further drawn into a required thinner aluminum monofilament by the middle drawing, and finally the thinner aluminum monofilament is further drawn into a required micro aluminum monofilament by the micro drawing;
(3) A wire stranding process: arranging and combining the drawn aluminum monofilaments according to a certain rule, and stranding the aluminum monofilaments into conductor wire bundles by a stranding machine process;
(4) Annealing process: the conductor wire bundle stranded in the step (3) is subjected to an annealing process to improve the mechanical property of the product;
(5) The processing technology of the aluminum alloy sheath comprises the following steps: manufacturing a plurality of aluminum alloy sheaths in a machining mode, wherein the size of the inner wall of each aluminum alloy sheath is matched with the size of the cable core to be wrapped;
(6) A cabling process: extruding, insulating, cabling, extruding a sheath or armoring the conductor wire harness annealed in the step (4) to prepare an aluminum alloy cable;
(7) The detection process before delivery: and (5) performing 1000 times of thermal cycle detection before cabling leaves a factory.
Example 3
A1-Fe-Zn-Mg-Mn aluminum alloy for coal mine cables comprises the following components in percentage by weight:
Fe：1.2％；
Mg：0.5％；
Mn：0.5％；
Ti：0.13％；
Cr：0.2％；
Zn：0.35％；
Si：0.25％；
the balance of A1 and impurities;
the aluminum alloy has a resistivity of 0.028264 [ omega ] mm/m or less, an electrical conductivity of 61% or more IACS, an elongation at break of 10% or more, and a number of 90-degree fatigue bending of 30 or more.
In one embodiment, the aluminum alloy further includes a rare earth element in an amount of 0.1 to 0.25% by weight of the total composition of the aluminum alloy.
An aluminum alloy cable for coal mines is prepared by the following steps,
(1) Continuous casting and rolling: adding alloy elements such as rare earth and the like into the aluminum alloy of any one of claims 1 to 2 during smelting to obtain an aluminum alloy solution, cleaning and standing the aluminum alloy solution, placing the aluminum alloy solution into a continuous casting machine for casting, trimming the cast blank, and then rolling the trimmed blank into an aluminum alloy rod in a continuous rolling machine;
(2) The wire drawing process comprises the following steps: reducing the section of the aluminum alloy rod obtained in the step (1) by a wire drawing process to increase the length of a conductor, wherein the aluminum alloy rod needs to be subjected to three procedures of large drawing, middle drawing and micro drawing, the aluminum alloy rod is drawn into a required aluminum monofilament by the large drawing, the aluminum monofilament is further drawn into a required thinner aluminum monofilament by the middle drawing, and finally the thinner aluminum monofilament is further drawn into a required micro aluminum monofilament by the micro drawing;
(3) A wire stranding process: arranging and combining the drawn aluminum monofilaments in the step (2) according to a certain rule, and stranding the aluminum monofilaments into conductor wire bundles through a wire stranding machine process;
(4) Annealing process: the conductor wire bundle stranded in the step (3) is subjected to an annealing process to improve the mechanical property of the product;
(5) The processing technology of the aluminum alloy sheath comprises the following steps: manufacturing a plurality of aluminum alloy sheaths in a machining mode, wherein the size of the inner wall of each aluminum alloy sheath is matched with the size of the cable core to be wrapped;
(6) A cabling process: extruding, insulating, cabling, extruding a sheath or armoring the conductor wire harness annealed in the step (4) to prepare an aluminum alloy cable;
(7) The detection process before delivery: and (5) performing 1000 times of thermal cycle detection before cabling leaves a factory.
The following table is a comparison table of performance of the aluminum alloy cable and the copper core cable in the application.
As can be seen from the above table, the aluminum alloy cable of the present application has the following advantages compared to the copper core cable in the prior art: 1. the cost is low. The cost of main materials used for manufacturing the aluminum alloy cables with the same length is lower than that of the copper core cables, and the excellent mechanical properties such as bending and creep resistance are added, so that the installation is simple and convenient, the construction cost is greatly reduced, and the comprehensive cost of the insulation is reduced by 25-30% compared with that of the copper cables due to the use of high-performance flame-retardant non-toxic low-smoke materials.
2. The insulating layer is made of the flame-retardant silane crosslinked polyethylene insulating material, so that the temperature of the working environment of the product can reach-40-105 ℃, the high temperature of 1000 ℃ can be realized, the flame retardance, the dripping resistance, the toxic gas resistance and the smoke resistance are avoided, the fire risk and the personal safety hidden danger are greatly reduced, and the flame-retardant silane crosslinked polyethylene insulating material is particularly suitable for high-rise buildings, civil residential quarters and people gathering buildings.
3. The flexibility is improved by 25% compared with copper cable, the rebound performance is 40% smaller than copper cable, the extension and corrosion resistance are both better than copper cable, and the creep resistance is the same as copper core cable. The outer layer of the product adopts a self-locking aluminum armor technology, has the characteristics of excellent compression resistance, impact resistance, bending resistance, flame retardance, fire resistance, insect and mouse bite prevention and the like, and is more widely applicable.
4. The raw material source is sufficient, which is beneficial to ensuring the national energy safety. The external dependence of copper resources in China is as high as more than 70%, and aluminum ore and rare earth resources in China are sufficiently ensured.
5. Energy conservation and emission reduction, and is beneficial to the construction of beautiful China. The aluminum and the aluminum alloy materials are adopted in a large amount, the smelting energy consumption is low, the CO2 emission is reduced by more than 50%, and great benefits are provided for relieving and improving the haze air.
6. The method is suitable for the urgent need of the current power grid construction development. Currently, large-scale, trans-regional, remote transmission and large-scale optimal configuration of energy resources are imperatively distributed in a reverse direction between energy resources and energy requirements in China. The aluminum alloy cable has high performance, low cost and easy installation, and is an ideal choice for developing an intelligent power grid and accelerating the construction of power grid infrastructure.
The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A1-Fe-Zn-Mg-Mn series aluminum alloy for coal mine cables is characterized by comprising the following components in percentage by weight:
Fe：0.3-1.3％；
Mg：0.02-0.6％；
Mn：0.02-0.6％；
Ti：0-0.15％；
Cr：0-0.3％；
Zn：0-0.4％；
Si：0-0.3％；
the balance of A1 and impurities;
the aluminum alloy has a resistivity of 0.028264 [ omega ] mm/m or less, an electric conductivity of 61% or more of IACS, an elongation at break of not less than 10%, and the number of times of 90-degree fatigue bending of 30 or more.
2. The A1-Fe-Zn-Mg-Mn series aluminum alloy for coal mine cables as recited in claim 1, wherein said aluminum alloy further comprises rare earth elements, and the content of said rare earth elements is 0.1-0.25% by weight based on the total weight of the aluminum alloy components.
3. An aluminum alloy cable for coal mines is characterized in that the aluminum alloy cable is prepared by the following steps,
(1) Continuous casting and rolling: adding alloy elements such as rare earth and the like into the aluminum alloy of any one of claims 1 to 2 during smelting to obtain an aluminum alloy solution, cleaning and standing the aluminum alloy solution, placing the aluminum alloy solution into a continuous casting machine for casting, trimming the cast blank, and then rolling the trimmed blank into an aluminum alloy rod in a continuous rolling machine;
(2) A wire drawing process: reducing the section of the aluminum alloy rod obtained in the step (1) by a wire drawing process to increase the length of a conductor, wherein the aluminum alloy rod needs to be subjected to three procedures of large drawing, middle drawing and micro drawing, the aluminum alloy rod is drawn into a required aluminum monofilament by the large drawing, the aluminum monofilament is further drawn into a required thinner aluminum monofilament by the middle drawing, and finally the thinner aluminum monofilament is further drawn into a required micro aluminum monofilament by the micro drawing;
(3) A wire stranding process: arranging and combining the drawn aluminum monofilaments in the step (2) according to a certain rule, and stranding the aluminum monofilaments into conductor wire bundles through a wire stranding machine process;
(4) And (3) annealing process: conducting annealing process on the stranded conductor wire bundle in the step (3) to improve the mechanical property of the product;
(5) The processing technology of the aluminum alloy sheath comprises the following steps: manufacturing a plurality of aluminum alloy sheaths in a machining mode, wherein the size of the inner wall of each aluminum alloy sheath is matched with the size of the cable core to be wrapped;
(6) A cabling process: extruding, insulating, cabling, extruding a sheath or armoring the conductor wire harness annealed in the step (4) to prepare an aluminum alloy cable;
(7) The detection process before delivery: and (5) performing 1000 times of thermal cycle detection before cabling leaves a factory.
4. The aluminum alloy cable for coal mines according to claim 3, wherein the diameter of the aluminum alloy cable is 59.1mm.
5. The aluminum alloy cable for coal mines as set forth in claim 3, wherein the temperature of melting in the step (1) is 700-800 ℃.
6. The aluminum alloy cable for the coal mine according to claim 3, wherein under the long-term operation condition of 90 ℃, the current-carrying capacity of the aluminum alloy cable is not lower than 90% of that of a copper cable with the same section.
7. The aluminum alloy cable for coal mines according to claim 3, wherein the aluminum alloy cable is not short-circuited or broken after 9000 times of bending tests.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211460356.4A CN115732116A (en) | 2022-11-17 | 2022-11-17 | A1-Fe-Zn-Mg-Mn series aluminum alloy for coal mine cable and aluminum alloy cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211460356.4A CN115732116A (en) | 2022-11-17 | 2022-11-17 | A1-Fe-Zn-Mg-Mn series aluminum alloy for coal mine cable and aluminum alloy cable |
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| Publication Number | Publication Date |
|---|---|
| CN115732116A true CN115732116A (en) | 2023-03-03 |
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|---|---|---|---|
| CN202211460356.4A Withdrawn CN115732116A (en) | 2022-11-17 | 2022-11-17 | A1-Fe-Zn-Mg-Mn series aluminum alloy for coal mine cable and aluminum alloy cable |
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Application publication date: 20230303 |