CN113174510A - High-strength bending-resistant copper alloy dropper wire and preparation method thereof - Google Patents
High-strength bending-resistant copper alloy dropper wire and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/045—Manufacture of wire or bars with particular section or properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/004—Copper alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/20—Arrangements for supporting or suspending trolley wires, e.g. from buildings
- B60M1/22—Separate lines from which power lines are suspended, e.g. catenary lines, supporting-lines under tension
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- 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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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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
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
Abstract
The invention relates to a high-strength bending-resistant copper alloy dropper wire and a preparation method thereof, wherein the copper alloy dropper wire comprises the following chemical components: 0.10 to 0.65 weight percent of Mg, 0.01 to 0.1 weight percent of rare earth element Re, and the balance of copper and inevitable impurities, wherein the proportion of the inevitable impurities is not higher than 0.10 weight percent; the preparation method comprises smelting, upward continuous casting, continuous extrusion, rolling, drawing (rough drawing, medium drawing and fine drawing), annealing treatment and stranding. The copper alloy dropper wire prepared by the method has high strength, good bending resistance and long service life, and can fully meet the application requirements of an electrified railway contact net; in addition, the production process is flexible, is suitable for batch production, and has high production efficiency and good economic benefit.
Description
Technical Field
The invention relates to the technical field of electrified railway contact networks, in particular to a high-strength bending-resistant copper alloy dropper wire and a preparation method thereof.
Background
The high speed of the electrified railway becomes one of the main marks of the national economic development level and the railway modernization, and the realization of the high speed of the electrified train needs to ensure that the pantograph achieves a stable current receiving state in the process of sliding along a contact line at a high speed. The traction power of the electrified train comes from the sliding contact of the pantograph and the contact line and continuously transmits current to the electric locomotive, and a dropper line is needed to fix and suspend the catenary and the contact line.
The dropper is used as a key connecting component in a traction power supply network of a high-speed railway, and bears large tension due to suspension of a contact line with a large length in the service process, and when a pantograph passes through, the contact line generates damping vibration to cause direct vibration of the dropper. When the locomotive passes through the contact net once, the amplitudes of different points on the contact net are slightly different, the vibration with the amplitude larger than 20mm is about 20 times, the vibration frequency per day is 2000, and the vibration frequency per year is about 73 ten thousand according to the condition that 100 trains pass through the contact net every day. The electrified railway in China has small running interval, large running density, more double-bow-frame trains and severe environmental pollution, the fluctuation speed and the vibration frequency of a contact net in the service process of a dropper are far higher than those of the working condition of high-speed railway in European Union, and in recent years, the contact nets of high-speed railways such as Wuguan, Jingguan, Jinghuso and the like have the phenomena of strand breakage and breakage of the integral dropper during running, so that potential safety hazards are brought to railway operation.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems occurring in the background, and an object of the present invention is to provide a high-strength bending-resistant copper alloy dropper wire which has good bending resistance while maintaining high strength, thereby effectively preventing fatigue fracture of the dropper, extending the service life of a contact network of an electric railway, and improving the operational safety of the electric railway.
The technical scheme adopted by the invention for solving the problems is as follows: a high strength bend resistant copper alloy dropper wire, the copper alloy dropper wire having a chemical composition of: mg 0.10-0.65 wt%; 0.001-0.1wt% of rare earth element Re, and the balance of copper and inevitable impurities, wherein the proportion of the inevitable impurities is not higher than 0.10 wt%.
Preferably, the rare earth element Re is at least one of yttrium Y and strontium Sr.
Preferably, the tensile strength of the single wire of the copper alloy dropper is 620-1000MPa, the electric conductivity is 65-90% IACS, the bending property of the copper alloy dropper is represented by the bending times, the single wire breakage does not occur when the bending times are repeated for more than 120 times, the strand breakage does not occur when the bending times are repeated for more than 200 times (the whole strand is completely broken), and the whole dropper line is not completely broken when the bending times are more than 300 times.
Preferably, the copper is cathode copper.
The invention also aims to provide a preparation method of the high-strength bending-resistant copper alloy dropper wire, which comprises the following steps:
(1) adding copper into a smelting chamber of a power frequency smelting furnace for smelting, and adding a covering agent for isolating oxygen.
(2) And then adding magnesium ingot and rare earth elements in sequence for smelting to obtain CuMgRe alloy solution.
(3) And (3) carrying out upward continuous casting on the CuMgRe alloy melt obtained in the step (2) through an upward continuous casting process to obtain an upward copper rod.
(4) And (4) extruding the upward-guiding copper rod obtained in the step (3) through a continuous extruder to obtain an extruded copper rod.
(5) And (4) rolling the extruded copper rod with the diameter larger than 16mm obtained in the step (4) into a rolled rod through a rolling mill.
(6) And (5) drawing the extruded copper rod with the diameter less than 16mm obtained in the step (4) or the rolled rod obtained in the step (5) into a monofilament in multiple passes, and performing intermediate annealing treatment on the monofilament in the wire drawing process.
(7) And (4) twisting the single yarns in the step (6) into corresponding single-strand yarns.
(8) And (4) stranding the single stranded wires in the step (7) into a dropper wire.
(9) And (4) annealing the dropper wire in the step (8).
Wherein, inert gas is introduced for protection in the steps (1) - (3), (6) and (10).
Preferably, the smelting temperature in the step (1) is controlled to be 1100-1200 ℃, the covering agent is charcoal or graphite flakes, and the industrial frequency smelting furnace is composed of a smelting chamber and a heat preservation chamber.
Preferably, the smelting temperature in the step (2) is controlled to be 1210-1260 ℃, and the rare earth element is added into the smelting chamber in a Cu-Re intermediate alloy mode.
Preferably, the step (3) is specifically: controlling the CuMgRe alloy melt obtained in the step (2) at 1150-plus 1200 ℃, and carrying out up-drawing continuous casting to obtain an up-drawing copper rod, wherein the up-drawing speed is 200-plus 350mm/min, the up-drawing pitch is 2-6 mm/time, the water inlet temperature of the cooling water of the crystallizer is 18-36 ℃, the water outlet temperature of the cooling water of the crystallizer is 20-50 ℃, the diameter of the up-drawing copper rod is 16-30mm, and the oxygen content of the copper rod is not higher than 8 ppm;
the step (4) is specifically as follows: extruding the upward-leading copper rod obtained in the step (3) into an extruded copper rod with the diameter of 8-40mm through a continuous extruder;
the step (5) is specifically as follows: rolling the extruded copper rod with the diameter larger than 16mm obtained in the step (4) into a rolled rod with the diameter of 6-12mm through a rolling mill;
the step (6) is specifically as follows: drawing the extruded copper rod with the diameter smaller than 16mm obtained in the step (4) or the rolled rod obtained in the step (5) into the monofilament with the corresponding specification in multiple passes, wherein the specific steps are as follows: rough drawing (filament diameter 1.8-3.5 mm) → medium drawing (filament diameter 1.0-2.0 mm) → fine drawing (filament diameter 0.2-1.0 mm), and intermediate annealing treatment is carried out on the filaments during the drawing process.
Preferably, the intermediate annealing treatment is selected from one of the following modes: coarse pulling → intermediate annealing → medium pulling → fine pulling, coarse pulling → medium pulling → intermediate annealing → fine pulling, coarse pulling → intermediate annealing → fine pulling, wherein the annealing temperature is 250-.
Preferably, the annealing temperature in the step (9) is 100-300 ℃, and the annealing heat preservation time is 1-6 h.
Compared with the prior art, the invention has the advantages that:
(1) micro second-phase particles are formed among trace Y and Sr elements, copper elements and magnesium elements and distributed in crystal grains and crystal boundaries, so that the pinning effect on the crystal grains and dislocation is achieved, the recrystallization temperature and the high-temperature softening resistance of the copper-magnesium alloy are improved, and by adopting the annealing process, a balance point is easier to find in the strength and the bending property, so that the finally prepared monofilament has the strength and the bending property; the flexibility and controllability of the annealing process are improved, and a balance point between the strength and the bending property is easier to find in the production process; in addition, the Re element can purify the copper-magnesium alloy matrix, reduce the lattice distortion of the alloy matrix, and simultaneously refine the grain structure, thereby being beneficial to improving the mechanical property and the conductivity of the alloy.
(2) The copper alloy dropper wire prepared by the method has high strength, good bending resistance and long service life, and can fully meet the application requirements of the contact net of the electrified railway; in addition, the production process is flexible, is suitable for batch production, and has high production efficiency and good economic benefit.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
A high-strength bending-resistant copper alloy dropper wire, wherein the chemical composition of the copper alloy dropper wire is 0.20wt% of Mg; 0.04wt% of Y; the balance being Cu and unavoidable impurities.
A preparation method of a high-strength bending-resistant copper alloy dropper wire comprises the following steps:
(1) adding cathode copper into a smelting chamber of a power frequency smelting furnace for smelting, adding covering agent charcoal for oxygen isolation, wherein the smelting temperature is 1150 ℃, and introducing inert gas for protection.
(2) And adding a magnesium ingot into the smelting chamber to be smelted at the smelting temperature of 1155 ℃, then adding the rare earth element into the smelting chamber in a Cu-Re intermediate alloy mode, controlling the smelting temperature to be 1230 ℃, and introducing inert gas for protection during the smelting temperature to obtain CuMgRe alloy melt.
(3) CuMg prepared in the step (2)0.2Y0.04And moving the alloy melt to a heat preservation chamber of a power frequency smelting furnace, controlling the temperature to be 1170 ℃, carrying out upward continuous casting to prepare an upward copper rod, wherein the upward speed is 250mm/min, the upward pitch is 5 mm/time, the water inlet temperature of cooling water of a crystallizer is 22 ℃, the water outlet temperature of the cooling water of the crystallizer is 28 ℃, the diameter of the upward copper rod is 18mm, and introducing inert gas for protection.
(4) And (4) extruding the upward-leading copper rod obtained in the step (3) into an extruded copper rod with the diameter of 8mm through a continuous extruder.
(5) Drawing the 8mm extruded copper rod obtained in the step (4) into a monofilament with the diameter of 0.5mm in multiple passes, which comprises the following specific steps: coarse drawing (filament diameter 3 mm) → medium drawing (filament diameter 1.5 mm) → intermediate annealing → fine drawing (filament diameter 0.5 mm), annealing temperature 300 ℃, annealing heat preservation time 2.5h, and inert gas is introduced for protection.
(6) And (5) twisting the single yarns in the step (5) into corresponding single-strand yarns.
(7) And (4) twisting the single stranded wires in the step (6) into the chord wires meeting the requirements.
(8) And (4) annealing the dropper wire in the step (7), wherein the annealing temperature is 100 ℃, the annealing heat preservation time is 5 hours, and inert gas is introduced for protection.
Example 2
A high-strength bending-resistant copper alloy dropper wire, wherein the chemical composition of the copper alloy dropper wire is 0.35wt% of Mg; 0.06wt% of Sr; the balance being Cu and unavoidable impurities.
A preparation method of a high-strength bending-resistant copper alloy dropper wire comprises the following steps:
steps (1) to (2) were carried out in accordance with the procedures described in example 1.
(3) CuMg prepared in the step (2)0.35Sr0.06And moving the alloy melt to a heat preservation chamber of a power frequency smelting furnace, controlling the temperature to be 1170 ℃, carrying out upward continuous casting to prepare an upward copper rod, wherein the upward speed is 230mm/min, the upward pitch is 5 mm/time, the water inlet temperature of cooling water of a crystallizer is 22 ℃, the water outlet temperature of the cooling water of the crystallizer is 28 ℃, the diameter of the upward copper rod is 28mm, and inert gas is introduced for protection.
(4) And (4) extruding the upward-leading copper rod obtained in the step (3) into an extruded copper rod with the diameter of 16mm through a continuous extruder.
(5) Drawing the 16mm extruded copper rod obtained in the step (4) into a monofilament with the diameter of 0.25mm in multiple passes, which comprises the following specific steps: rough drawing (filament diameter 2.8 mm) → intermediate annealing (annealing temperature 400 ℃, annealing holding time 0.5 h) → intermediate drawing (filament diameter 1.6 mm) → intermediate annealing (annealing temperature 350 ℃, annealing holding time 1.5 h) → fine drawing (filament diameter 0.25 mm), during which inert gas is introduced for protection.
(6) And (5) twisting the single yarns in the step (5) into corresponding single-strand yarns.
(7) And (4) twisting the single stranded wires in the step (6) into the chord wires meeting the requirements.
(8) And (4) annealing the dropper wire in the step (7), wherein the annealing temperature is 150 ℃, the annealing heat preservation time is 4 hours, and inert gas is introduced for protection.
Example 3
A high-strength bending-resistant copper alloy dropper wire, wherein the chemical composition of the copper alloy dropper wire is 0.50wt% of Mg; 0.05wt% of Y; 0.05wt% of Sr; the balance being Cu and unavoidable impurities.
A preparation method of a high-strength bending-resistant copper alloy dropper wire comprises the following steps:
steps (1) to (2) were carried out in accordance with the procedures described in example 1.
(3) CuMg prepared in the step (2)0.50Sr0.05Y0.05And moving the alloy melt to a heat preservation chamber of a power frequency smelting furnace, controlling the temperature to be 1170 ℃, carrying out upward continuous casting to prepare an upward copper rod, wherein the upward speed is 250mm/min, the upward pitch is 5 mm/time, the water inlet temperature of cooling water of a crystallizer is 22 ℃, the water outlet temperature of the cooling water of the crystallizer is 28 ℃, the diameter of the upward copper rod is 30mm, and inert gas is introduced for protection.
(4) And (4) extruding the upward-leading copper rod obtained in the step (3) into an extruded copper rod with the diameter of 12mm through a continuous extruder.
(5) Drawing the 12mm extruded copper rod in the step (4) into a monofilament with the diameter of 0.65mm in multiple passes, which comprises the following specific steps: : coarse drawing (filament diameter 3.5 mm) → medium drawing (filament diameter 2.0 mm) → intermediate annealing → fine drawing (filament diameter 0.65 mm), annealing temperature 350 ℃, annealing heat preservation time 2h, and inert gas protection during annealing.
(6) And (5) twisting the single yarns in the step (5) into corresponding single-strand yarns.
(7) And (4) twisting the single stranded wires in the step (6) into the chord wires meeting the requirements.
(8) And (4) annealing the dropper wire in the step (7), wherein the annealing temperature is 200 ℃, the annealing heat preservation time is 2.5 hours, and inert gas is introduced for protection.
Example 4
A high-strength bending-resistant copper alloy dropper wire comprises 0.15wt% of Mg; 0.02wt% of Y; 0.07 percent of Sr; the balance being Cu and unavoidable impurities.
A preparation method of a high-strength bending-resistant copper alloy dropper wire comprises the following steps:
steps (1) to (2) were carried out in accordance with the procedures described in example 1.
(3) CuMg prepared in the step (2)0.15Sr0.07Y0.02And moving the alloy melt to a heat preservation chamber of a power frequency smelting furnace, controlling the temperature to be 1170 ℃, carrying out upward continuous casting to prepare an upward copper rod, wherein the upward speed is 240mm/min, the upward pitch is 5 mm/time, the water inlet temperature of cooling water of a crystallizer is 22 ℃, the water outlet temperature of the cooling water of the crystallizer is 28 ℃, the diameter of the upward copper rod is 23mm, and inert gas is introduced for protection.
(4) And (4) extruding the upward-leading copper rod obtained in the step (3) into an extruded copper rod with the diameter of 30mm through a continuous extruder.
(5) And (4) rolling the extruded copper rod with the diameter of 30mm in the step (4) into a rolled rod with the diameter of 7mm through a rolling mill.
(6) Drawing the 7mm rolling rod in the step (5) into a monofilament with the diameter of 0.65mm in multiple passes, which comprises the following steps: coarse drawing (filament diameter 3.0 mm) → intermediate annealing → medium drawing (filament diameter 1.8 mm) → fine drawing (filament diameter 0.65 mm), inert gas shielding in the annealing process, annealing temperature 450 ℃, and annealing holding time 1 h.
(7) And (4) twisting the monofilaments obtained in the step (6) into corresponding single-strand strands.
(8) And (4) twisting the single stranded wires in the step (7) into the chord wires meeting the requirements.
(9) And (4) annealing the dropper wire in the step (8), wherein the annealing temperature is 120 ℃ and the annealing heat preservation time is 3.5h under the protection of inert gas in the annealing process.
Example 5
A high-strength bending-resistant copper alloy dropper wire, wherein the chemical composition of the copper alloy dropper wire is Mg0.45wt%; y0.06wt%; sr0.04wt%; the balance being Cu and unavoidable impurities.
A preparation method of a high-strength bending-resistant copper alloy dropper wire comprises the following steps:
steps (1) to (2) were carried out in accordance with the procedures described in example 1.
(3) CuMg prepared in the step (2)0.45Sr0.04Y0.06And moving the alloy melt to a heat preservation chamber of a power frequency smelting furnace, controlling the temperature to be 1170 ℃, carrying out upward continuous casting to prepare an upward copper rod, wherein the upward speed is 235mm/min, the upward pitch is 5 mm/time, the water inlet temperature of cooling water of a crystallizer is 22 ℃, the water outlet temperature of the cooling water of the crystallizer is 28 ℃, the diameter of the upward copper rod is 25mm, and introducing inert gas for protection.
(4) And (4) extruding the upward-leading copper rod obtained in the step (3) into an extruded copper rod with the diameter of 35mm through a continuous extruder.
(5) And (4) rolling the extruded copper rod with the diameter of 35mm in the step (4) into a rolled rod with the diameter of 10mm through a rolling mill.
(6) Drawing the 10mm rolling rod in the step (5) into a monofilament with the diameter of 0.50mm in multiple passes, which comprises the following steps: : coarse drawing (filament diameter of 2.8 mm) → medium drawing (filament diameter of 1.8 mm) → intermediate annealing → fine drawing (filament diameter of 0.50 mm), annealing temperature of 400 ℃, annealing heat preservation time of 2h, and inert gas protection during annealing.
(7) And (4) twisting the monofilaments obtained in the step (6) into corresponding single-strand strands.
(8) And (4) twisting the single stranded wires in the step (7) into the chord wires meeting the requirements.
(9) And (4) annealing the dropper wire in the step (8), wherein the annealing temperature is 160 ℃ and the annealing heat preservation time is 4.5h under the protection of inert gas in the annealing process.
Comparative example 1
Compared with example 1, the difference is only that: no Y was added.
Comparative example 2
Compared with example 1, the difference is only that: 0.15wt% Y was added.
Comparative example 3
Compared with example 1, the difference is only that: y is replaced by Sc.
The hanger wires obtained in examples 1 to 5 were subjected to performance tests, and the results are shown in the following table:
note 1: the test method was carried out with reference to the relevant requirements in TB/T3111-2017, copper and copper alloy stranded wires for electrified railways, in which the specimen was bent repeatedly over a length of 100mm, and the bending speed was not more than 60 times/min, taking as 1 time the specimen was bent 180 degrees (i.e. the specimen started from the original position and returned to the original position).
Note 2: the recording rule of the bending times is that the times when 1 monofilament is bent and broken/the times when the whole dropper is completely broken in the bending process of the whole dropper line are, for example: 145/232/353 means that the number of times of breakage of 1 monofilament in bending of the whole dropper line is 145, the number of times of complete breakage of 1 monofilament is 232/the number of times of complete breakage of the whole dropper line is 353.
In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.
Claims (9)
1. A high strength is able to bear or endure crooked copper alloy dropper line which characterized in that: the copper alloy dropper wire comprises the following chemical components: mg 0.10-0.65 wt%; 0.001-0.1wt% of rare earth element Re, the balance of copper and inevitable impurities, the proportion of the inevitable impurities is not higher than 0.10wt%, and the rare earth element Re is at least one of yttrium Y and strontium Sr.
2. The high strength bend resistant copper alloy dropper line of claim 1, wherein: the monofilament tensile strength of the copper alloy dropper wire is 620-1000MPa, and the electric conductivity of the copper alloy dropper wire is 65-90% IACS.
3. The high strength bend resistant copper alloy dropper line of claim 1, wherein: the copper is cathode copper.
4. A preparation method of a high-strength bending-resistant copper alloy dropper wire is characterized by comprising the following steps: the method comprises the following steps:
(1) adding copper into a smelting chamber of a power frequency smelting furnace for smelting, and adding a covering agent for oxygen isolation;
(2) then adding magnesium ingot and rare earth element in sequence for smelting to obtain CuMgRe alloy solution;
(3) carrying out up-drawing continuous casting on the CuMgRe alloy melt obtained in the step (2) through an up-drawing continuous casting process to form an up-drawing copper rod;
(4) extruding the upward copper rod obtained in the step (3) through a continuous extruder to obtain an extruded copper rod;
(5) rolling the extruded copper rod with the diameter larger than 16mm obtained in the step (4) into a rolled rod through a rolling mill;
(6) drawing the extruded copper rod with the diameter less than 16mm obtained in the step (4) or the rolled rod obtained in the step (5) into a monofilament in multiple passes, and performing intermediate annealing treatment on the monofilament in the wire drawing process;
(7) twisting the single yarns in the step (6) into corresponding single-strand strands;
(8) stranding the single stranded wires in the step (7) into a dropper wire;
(9) annealing the dropper wire in the step (8);
wherein, inert gas is introduced for protection in the steps (1) - (3), (6) and (10).
5. The method for preparing a high-strength bending-resistant copper alloy dropper wire according to claim 4, wherein the method comprises the following steps: in the step (1), the smelting temperature is controlled at 1100-1200 ℃, and the covering agent is charcoal or graphite flakes.
6. The method for preparing a high-strength bending-resistant copper alloy dropper wire according to claim 4, wherein the method comprises the following steps: in the step (2), the smelting temperature is controlled to be 1210-1260 ℃, and the rare earth elements are added into the smelting chamber in a Cu-Re intermediate alloy mode.
7. The method for preparing a high-strength bending-resistant copper alloy dropper wire according to claim 4, wherein the method comprises the following steps: the step (3) is specifically as follows: controlling the CuMgRe alloy melt obtained in the step (2) at 1150-plus 1200 ℃, and carrying out up-drawing continuous casting to obtain an up-drawing copper rod, wherein the up-drawing speed is 200-plus 350mm/min, the up-drawing pitch is 2-6 mm/time, the water inlet temperature of the cooling water of the crystallizer is 18-36 ℃, the water outlet temperature of the cooling water of the crystallizer is 20-50 ℃, the diameter of the up-drawing copper rod is 16-30mm, and the oxygen content of the copper rod is not higher than 8 ppm;
the step (4) is specifically as follows: extruding the upward-leading copper rod obtained in the step (3) into an extruded copper rod with the diameter of 8-40mm through a continuous extruder;
the step (5) is specifically as follows: rolling the extruded copper rod with the diameter larger than 16mm obtained in the step (4) into a rolled rod with the diameter of 6-12mm through a rolling mill;
the step (6) is specifically as follows: drawing the extruded copper rod with the diameter smaller than 16mm obtained in the step (4) or the rolled rod obtained in the step (5) into the monofilament with the corresponding specification in multiple passes, wherein the specific steps are as follows: performing intermediate annealing treatment on the monofilaments in the process of rough drawing → medium drawing → fine drawing and wire drawing, wherein the diameter of the monofilaments in the rough drawing is 1.8-3.5mm, the diameter of the monofilaments in the medium drawing is 1.0-2.0mm and the diameter of the monofilaments in the fine drawing is 0.2-1.0 mm.
8. The method for preparing a high-strength bending-resistant copper alloy dropper wire according to claim 4, wherein the method comprises the following steps: the intermediate annealing treatment is selected from one of the following modes: coarse pulling → intermediate annealing → medium pulling → fine pulling, coarse pulling → medium pulling → intermediate annealing → fine pulling, coarse pulling → intermediate annealing → fine pulling, wherein the annealing temperature is 250-.
9. The method for preparing a high-strength bending-resistant copper alloy dropper wire according to claim 4, wherein the method comprises the following steps: in the step (9), the annealing temperature is 100-300 ℃, and the annealing heat preservation time is 1-6 h.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113664410A (en) * | 2021-08-24 | 2021-11-19 | 江苏亨通电力特种导线有限公司 | Novel copper alloy deposited material and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1933037A (en) * | 2006-08-25 | 2007-03-21 | 邢台鑫晖铜业特种线材有限公司 | Method for producing copper alloy contact wire with excellent comprehensive performance |
| CN101032928A (en) * | 2007-04-05 | 2007-09-12 | 辽宁金鑫环电缆有限公司 | Magnesium and copper alloy carrier cable for electrization railway light transporting |
| CN102851527A (en) * | 2012-09-07 | 2013-01-02 | 江西理工大学 | Copper-silver-magnesium alloy contact wire and preparation method thereof |
| CN103276237A (en) * | 2013-06-15 | 2013-09-04 | 山东亨圆铜业有限公司 | Preparation method of copper and magnesium alloy contact wire for railway electrification |
| CN107685078A (en) * | 2017-07-10 | 2018-02-13 | 常州易藤电气有限公司 | A kind of preparation method of electric railway copper alloy dropper line |
| JP6311299B2 (en) * | 2013-12-11 | 2018-04-18 | 三菱マテリアル株式会社 | Copper alloy for electronic / electric equipment, copper alloy plastic working material for electronic / electric equipment, manufacturing method of copper alloy plastic working material for electronic / electric equipment, electronic / electric equipment parts and terminals |
-
2021
- 2021-04-26 CN CN202110450967.XA patent/CN113174510A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1933037A (en) * | 2006-08-25 | 2007-03-21 | 邢台鑫晖铜业特种线材有限公司 | Method for producing copper alloy contact wire with excellent comprehensive performance |
| CN101032928A (en) * | 2007-04-05 | 2007-09-12 | 辽宁金鑫环电缆有限公司 | Magnesium and copper alloy carrier cable for electrization railway light transporting |
| CN102851527A (en) * | 2012-09-07 | 2013-01-02 | 江西理工大学 | Copper-silver-magnesium alloy contact wire and preparation method thereof |
| CN103276237A (en) * | 2013-06-15 | 2013-09-04 | 山东亨圆铜业有限公司 | Preparation method of copper and magnesium alloy contact wire for railway electrification |
| JP6311299B2 (en) * | 2013-12-11 | 2018-04-18 | 三菱マテリアル株式会社 | Copper alloy for electronic / electric equipment, copper alloy plastic working material for electronic / electric equipment, manufacturing method of copper alloy plastic working material for electronic / electric equipment, electronic / electric equipment parts and terminals |
| CN107685078A (en) * | 2017-07-10 | 2018-02-13 | 常州易藤电气有限公司 | A kind of preparation method of electric railway copper alloy dropper line |
Non-Patent Citations (3)
| Title |
|---|
| 徐光宪: "《稀土 下 第2版》", 31 December 1995 * |
| 解德汝等: "《云南省有色金属深度加工进展》", 30 November 1990 * |
| 钟卫佳: "《铜加工技术实用手册》", 31 January 2007 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113664410A (en) * | 2021-08-24 | 2021-11-19 | 江苏亨通电力特种导线有限公司 | Novel copper alloy deposited material and preparation method thereof |
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