CN113073228B - Conducting rod for vacuum arc-extinguishing chamber, processing method of conducting rod and vacuum arc-extinguishing chamber - Google Patents
Conducting rod for vacuum arc-extinguishing chamber, processing method of conducting rod and vacuum arc-extinguishing chamber Download PDFInfo
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- CN113073228B CN113073228B CN202110352674.8A CN202110352674A CN113073228B CN 113073228 B CN113073228 B CN 113073228B CN 202110352674 A CN202110352674 A CN 202110352674A CN 113073228 B CN113073228 B CN 113073228B
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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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- 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
- 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
- C22F1/08—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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Abstract
The invention discloses a conducting rod for a vacuum arc-extinguishing chamber, a processing method thereof and the vacuum arc-extinguishing chamber, wherein the conducting rod comprises the following components: 3.5 to 6.5 weight percent of Fe, 0.02 to 0.15 weight percent of Mg, 0.02 weight percent of La, 0.05 weight percent of Ce and the balance of Cu. The processing method is made of Cu-Fe alloy, the cost is low, the raw materials are rich, after solid solution strengthening, aging strengthening, fine grain strengthening and deformation strengthening, the Brinell hardness of the conductive rod is not less than 75HB, the tensile strength is not less than 580MPa, the conductivity is not less than 80% IACS, the requirements of the conductive rod for the vacuum arc-extinguishing chamber are completely met, the service life of the conductive rod is prolonged, and a power supply can be quickly, reliably and safely cut off in the using process.
Description
Technical Field
The invention relates to the field of vacuum arc-extinguishing chambers, in particular to a conducting rod for a vacuum arc-extinguishing chamber, a processing method of the conducting rod and the vacuum arc-extinguishing chamber.
Background
The vacuum arc-extinguishing chamber is also called a vacuum switch tube or a vacuum bulb and is a core device of the vacuum switch. It is a vacuum device which uses a pair of electrodes (contacts) and other parts sealed in vacuum, and utilizes the excellent insulating and arc-extinguishing properties of vacuum to implement closing or breaking of circuit, and after the power supply is cut off, it can quickly extinguish arc and inhibit current. The vacuum arc-extinguishing chamber mainly comprises an airtight insulating system, a conducting system, a shielding system and a contact system, wherein the conducting system mainly plays a role in conducting current and comprises a movable conducting rod and a static conducting rod. At present, the conducting rod is made of oxygen-free copper.
However, the oxygen-free copper rod for the traditional vacuum arc-extinguishing chamber has the undesirable phenomena of deformation, clamping stagnation, bending and the like of the movable conducting rod when being used at a high frequency, so that the service life of the vacuum arc-extinguishing chamber is greatly reduced, and serious faults are caused, so that the power supply cannot be quickly, reliably and safely cut off.
The invention patent of invention No. CN 208478224U of prior art 1 provides a novel conducting rod for a vacuum arc-extinguishing chamber.
Be equipped with the arc lug that the several is parallel to each other on the static conducting rod, and the arc lug with the terminal surface of static conducting rod is parallel, the below of static conducting rod is equipped with the contact, the surface of contact is equipped with annular batch oil tank, be equipped with cooling tube and back flow between the arc lug, the cooling tube run through annular batch oil tank and with the bottom of annular batch oil tank is contradicted, the back flow with the top intercommunication of annular batch oil tank, the outside of static conducting rod top is equipped with annular cold and gets the case, the top of getting the case is cold to the annular is equipped with into oil pipe, the cold case of getting of annular is keeping away from one side of going into oil pipe is equipped with out oil pipe, the cold inside of getting the case of annular is equipped with a plurality of condensation baffles, and is a plurality of overflow holes have been seted up on condensation baffle's surface.
The invention has the defect that the structure of the conducting rod is only improved, the improvement of the material of the conducting rod is not involved, and the bad phenomena of deformation, clamping stagnation, bending and the like of the movable conducting rod when the conducting rod is used at a higher frequency can not be solved.
The invention patent of patent No. CN 109036949A in the prior art 2 discloses a conducting rod for a vacuum arc-extinguishing chamber and a processing method thereof, and provides the conducting rod for the vacuum arc-extinguishing chamber.
The tungsten-copper contact and the oxygen-free copper guide rod are welded into a whole through plasma or friction welding, and the diameter of the tungsten-copper contact is larger than that of the oxygen-free copper guide rod. The invention relates to a processing method of a conducting rod for a vacuum arc-extinguishing chamber, which comprises the following steps: selecting a copper-coated tungsten-copper contact and an oxygen-free copper guide rod, and then welding the tungsten-copper contact and the oxygen-free copper guide rod together by adopting plasma or friction welding to obtain a conducting rod blank; and (4) performing conventional treatment on the conducting rod blank to obtain the conducting rod. The processing method organically combines the tungsten copper contact and the oxygen-free copper guide rod together in a plasma or friction welding mode, and eliminates the riveting and brazing processes of the tungsten copper contact and the oxygen-free copper guide rod.
The disadvantages are: the invention only improves the structure of the conducting rod, does not relate to the improvement of the material of the conducting rod, and still cannot solve the problems of deformation, clamping stagnation, bending and the like of the movable conducting rod when the conducting rod is used at a high frequency.
Disclosure of Invention
The invention aims to provide a conducting rod for a vacuum arc-extinguishing chamber, a processing method thereof and the vacuum arc-extinguishing chamber.
In order to achieve the purpose, the invention provides the following technical scheme:
a conducting rod for a vacuum arc-extinguishing chamber is characterized in that a copper-iron alloy cast ingot of the conducting rod comprises the following components in percentage by mass:
a processing method of a conducting rod for a vacuum arc-extinguishing chamber comprises the following steps:
smelting Cu, increasing power to smelt Fe after Cu is completely melted down, and reducing power to obtain molten liquid after Fe is completely melted down;
adding CuMg50, CuLa40 and CuCe40 intermediate alloy into the molten liquid; after the intermediate alloy is completely melted down, improving the power for refining; after refining and deslagging, reducing power, performing electromagnetic stirring, and casting to obtain a copper-iron alloy cast ingot; the copper-iron alloy cast ingot comprises the following components in percentage by weight: 3.5-6.5 wt% of Fe, 0.02-0.15 wt% of Mg, 0.02wt% of La, 0.05wt% of Ce and the balance of Cu;
cold-processing and peeling the copper-iron alloy cast ingot, and then carrying out homogenization annealing treatment; then carrying out grain refinement treatment to obtain a copper-iron alloy extrusion rod;
and (3) sequentially carrying out cold rolling treatment, aging treatment and cold deformation drawing treatment on the copper-iron alloy extrusion rod to obtain the copper-iron alloy conducting rod.
As a further improvement of the present invention, the Cu and Fe need to be cleaned before smelting, and the cleaning process is as follows:
carrying out acid washing, water washing and drying treatment on cathode copper and industrial pure iron for later use; the cathode copper pickling solution adopts 30% volume concentration sulfuric acid, and the industrial pure iron pickling solution adopts 25% volume concentration hydrochloric acid.
As a further improvement of the invention, the homogenization annealing treatment is carried out at the temperature of 900-950 ℃ for 4-6 hours in a protective atmosphere.
As a further improvement of the invention, the refined grain treatment is to extrude by using a 1400t copper section extruder at an extrusion speed of 2-3 m/s, perform water quenching to normal temperature after extrusion, and repeatedly extrude for multiple times to obtain the copper-iron alloy extrusion rod.
As a further improvement of the invention, in the cold rolling treatment, the rolling speed is 2-4 m/s, and the copper-iron alloy rolled rod is deformed by 5-7 passes.
As a further improvement of the invention, the aging strengthening treatment temperature is 400-500 ℃, and the time is 1-3 h.
As a further improvement of the present invention, the cold-deformation drawing process specifically comprises: and (5) carrying out cold drawing processing by using a giant drawing machine, wherein the drawing speed is 5-7 m/s.
As a further improvement of the invention, the conductive rod has Brinell hardness not less than 75HB, tensile strength not less than 580MPa and electric conductivity not less than 80% IACS.
A vacuum arc-extinguishing chamber, a conducting rod manufactured by the processing method.
Compared with the prior art, the invention has the following advantages:
the existing high-strength high-conductivity Cu-Cr, Cu-Mo, Cu-Co, Cu-Ag and other materials are expensive, complex in preparation process and high in production cost, and have no feasibility of replacing the existing oxygen-free copper conducting rod. The conducting rod for the vacuum arc-extinguishing chamber is made of Cu-Fe alloy, and has low cost and rich raw materials.
After solid solution strengthening, aging strengthening, fine grain strengthening and deformation strengthening, the method has Brinell hardness of not less than 75HB, tensile strength of not less than 580MPa and conductivity of not less than 80% IACS, completely meets the requirements of the conducting rod for the vacuum arc-extinguishing chamber, prolongs the service life of the conducting rod, and can quickly, reliably and safely cut off a power supply in the using process.
Drawings
Fig. 1 is a flow chart of a processing method of a conducting rod for a vacuum arc-extinguishing chamber according to the present invention.
Fig. 2 is a schematic view of a vacuum interrupter according to the present invention.
Wherein, 1 is static end conducting block, 2 is shielding cylinder, 3 is moving contact, 4 is bellows, 5 is moving end cover plate, 6 is static conducting rod, 7 is ceramic shell, 8 is moving conducting rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention provides a method for processing a conductive rod for a vacuum interrupter, which comprises the following steps:
(1) the conductive rod comprises the following components: 3.5 to 6.5 weight percent of Fe, 0.02 to 0.15 weight percent of Mg, 0.02 weight percent of La, 0.05 weight percent of Ce and the balance of Cu.
(2) Cleaning: and (3) carrying out acid washing, water washing and drying on the cathode copper and the industrial pure iron for later use. The cathode copper pickling solution adopts 30% volume concentration sulfuric acid, and the industrial pure iron pickling solution adopts 25% volume concentration hydrochloric acid.
(3) Smelting: heating the crucible at low power, vacuumizing and degassing to reach a vacuum degree of 1.0X 10-2Stopping air extraction after Pa, filling Ar gas to 0.05MPa, and starting to smelt Cu; standing for 5min after Cu is completely melted down, and increasing power to melt Fe until the Fe is completely melted downStanding for 10min at power, and adding intermediate alloys of CuMg50, CuLa40 and CuCe40 into the molten liquid; after the intermediate alloy is completely melted down, the power is increased, refined, deslagging is carried out, the power is reduced, electromagnetic stirring is carried out for 5min, and casting is carried out to obtain the product
And (5) casting a copper-iron alloy ingot.
(4) Homogenizing and annealing: and (3) carrying out cold machining and peeling 5mm on the copper-iron alloy ingot, and then carrying out homogenization annealing treatment. The homogenizing annealing treatment temperature is 900-950 ℃, the time is 4-6 hours, and the homogenizing annealing treatment is carried out in a protective atmosphere.
(5) Refining and strengthening crystal grains: will obtain
And carrying out grain refinement treatment on the copper-iron alloy cast ingot. And (3) extruding by using a 1400t copper section extruder at the extrusion speed of 2-3 m/s, and performing water quenching to normal temperature after extrusion. Repeating the extrusion twice, and reducing the diameter by half to obtain
The copper-iron alloy extrusion rod.
(6) Deformation strengthening: will be provided with
And carrying out cold rolling treatment on the copper-iron alloy extrusion rod. Cold rolling by using a two-roller mill at a rolling speed of 2-4 m/s, and performing 5-7 times of deformation (one fifth of the diameter reduction)
And (5) rolling the copper-iron alloy rod.
(7) Aging strengthening: will be
And (3) carrying out aging treatment on the copper-iron alloy in a rolling way, wherein the temperature of the aging treatment is 400-500 ℃, and the time is 1-3 h.
(8) Deformation strengthening: will be provided with
And carrying out cold deformation drawing treatment on the copper-iron alloy rolling rod. Cold-drawing with a giant drawing machine at a drawing speed of 5-7 m/s and with a diameter halved to obtain
And (5) finishing the copper-iron alloy conducting rod.
The processing method of the present invention will be described in detail with reference to specific examples.
Example 1
The formula consists of the following components: 5wt% of Fe, 0.02wt% of Mg, 0.02wt% of La, 0.05wt% of Ce and the balance of Cu.
Cleaning the raw materials: and (3) carrying out acid washing, water washing and drying on the cathode copper and the industrial pure iron for later use. The cathode copper pickling solution adopts 30% volume concentration sulfuric acid, and the industrial pure iron pickling solution adopts 25% volume concentration hydrochloric acid.
The vacuum melting: heating the crucible at low power, vacuumizing and degassing to reach a vacuum degree of 1.0X 10-2Stopping air extraction after Pa, filling Ar gas to 0.05MPa, and starting to smelt Cu; standing for 5min after Cu is completely melted, increasing the power to melt Fe till the Cu is completely melted, reducing the power to stand for 10min, and adding intermediate alloys of CuMg50, CuLa40 and CuCe40 into the melt; after the intermediate alloy is completely melted down, the power is increased, refined, deslagging is carried out, the power is reduced, electromagnetic stirring is carried out for 5min, and casting is carried out to obtain the product
And (5) casting a copper-iron alloy ingot.
And (3) homogenizing annealing: and (3) carrying out cold machining and peeling 5mm on the copper-iron alloy ingot, and then carrying out homogenization annealing treatment. The homogenizing annealing treatment temperature is 950 ℃, the time is 5 hours, and the homogenizing annealing treatment is carried out under the protective atmosphere.
The refined crystal grain strengthening: will obtain
And carrying out grain refinement treatment on the copper-iron alloy cast ingot. Adopting 1400t copper section bar to extrudeExtruding with a machine at an extrusion speed of 2.5m/s, and water quenching to normal temperature after extrusion. After repeating the extrusion twice, obtaining
The copper-iron alloy extrusion rod.
And (3) deformation strengthening: will be provided with
And carrying out cold rolling treatment on the copper-iron alloy extrusion rod. Cold rolling with a two-roller mill at a rolling speed of 3m/s for 6 times of deformation to obtain the final product
And (5) rolling the copper-iron alloy rod.
The aging strengthening comprises the following steps: will be
And (3) carrying out aging treatment on the copper-iron alloy in a rolling way, wherein the temperature of the aging treatment is 450 ℃, and the time is 2 h.
And (3) deformation strengthening: will be provided with
And carrying out cold deformation drawing treatment on the copper-iron alloy rolling rod. Cold-drawing with a giant drawing machine at a drawing speed of 6m/s to obtain
And (5) finishing the copper-iron alloy conducting rod.
In this process, the process is not particularly limited to the present application if it is a technical means well known to those skilled in the art.
The test shows that the copper-iron alloy conducting rod has Brinell hardness not less than 75HB, tensile strength not less than 580MPa and electric conductivity not less than 80% IACS, and completely meets the requirements of the conducting rod for the vacuum arc-extinguishing chamber.
Example 2
The invention provides a processing method of a conducting rod for a vacuum arc-extinguishing chamber, which comprises the following steps:
(1) the conductive rod comprises the following components: 3.5 percent of Fe, 0.02 percent of Mg, 0.02 percent of La, 0.05 percent of Ce and the balance of Cu.
(2) Cleaning: and (3) carrying out acid washing, water washing and drying on the cathode copper and the industrial pure iron for later use. The cathode copper pickling solution adopts 30% volume concentration sulfuric acid, and the industrial pure iron pickling solution adopts 25% volume concentration hydrochloric acid.
(3) Smelting: heating the crucible at low power, vacuumizing and degassing to reach a vacuum degree of 1.0X 10-2Stopping air extraction after Pa, filling Ar gas to 0.05MPa, and starting to smelt Cu; standing for 5min after Cu is completely melted, increasing the power to melt Fe till the Cu is completely melted, reducing the power to stand for 10min, and adding intermediate alloys of CuMg50, CuLa40 and CuCe40 into the melt; after the intermediate alloy is completely melted down, the power is increased, refined, deslagging is carried out, the power is reduced, electromagnetic stirring is carried out for 5min, and casting is carried out to obtain the product
And (5) casting a copper-iron alloy ingot.
(4) Homogenizing and annealing: and (3) carrying out cold machining and peeling 5mm on the copper-iron alloy ingot, and then carrying out homogenization annealing treatment. The temperature of the homogenizing annealing treatment is 900 ℃, the time is 4 hours, and the homogenizing annealing treatment is carried out under the protective atmosphere.
(5) Refining and strengthening crystal grains: will obtain
And carrying out grain refinement treatment on the copper-iron alloy cast ingot. And (3) extruding by using a 1400t copper profile extruder at the extrusion speed of 2m/s, and performing water quenching to normal temperature after extrusion. Repeating the extrusion twice, and reducing the diameter by half to obtain
The copper-iron alloy extrusion rod.
(6) Deformation strengthening: will be provided with
And carrying out cold rolling treatment on the copper-iron alloy extrusion rod. Cold rolling with two-roller mill at 2m/s speed and 5 times of deformation (five diameter reduction)One in one) to obtain
And (5) rolling the copper-iron alloy rod.
(7) Aging strengthening: will be
And (3) carrying out aging treatment on the copper-iron alloy by rolling, wherein the aging treatment temperature is 400 ℃ and the time is 1 h.
(8) Deformation strengthening: will be provided with
And carrying out cold deformation drawing treatment on the copper-iron alloy rolling rod. Cold-drawing with a giant drawing machine at a drawing speed of 5m/s and a diameter of half to obtain
And (5) finishing the copper-iron alloy conducting rod.
Example 3
The invention provides a processing method of a conducting rod for a vacuum arc-extinguishing chamber, which comprises the following steps:
(1) the conductive rod comprises the following components: 6.5wt% of Fe, 0.15wt% of Mg, 0.02wt% of La, 0.05wt% of Ce and the balance of Cu.
(2) Cleaning: and (3) carrying out acid washing, water washing and drying on the cathode copper and the industrial pure iron for later use. The cathode copper pickling solution adopts 30% volume concentration sulfuric acid, and the industrial pure iron pickling solution adopts 25% volume concentration hydrochloric acid.
(3) Smelting: heating the crucible at low power, vacuumizing and degassing to reach a vacuum degree of 1.0X 10-2Stopping air extraction after Pa, filling Ar gas to 0.05MPa, and starting to smelt Cu; standing for 5min after Cu is completely melted, increasing the power to melt Fe till the Cu is completely melted, reducing the power to stand for 10min, and adding intermediate alloys of CuMg50, CuLa40 and CuCe40 into the melt; after the intermediate alloy is completely melted down, the power is increased, refined, deslagging is carried out, the power is reduced, electromagnetic stirring is carried out for 5min, and casting is carried out to obtain the product
Copper iron alloyAnd (5) casting a gold ingot.
(4) Homogenizing and annealing: and (3) carrying out cold machining and peeling 5mm on the copper-iron alloy ingot, and then carrying out homogenization annealing treatment. The homogenizing annealing treatment temperature is 950 ℃, the time is 6 hours, and the homogenizing annealing treatment is carried out under the protective atmosphere.
(5) Refining and strengthening crystal grains: will obtain
And carrying out grain refinement treatment on the copper-iron alloy cast ingot. And (3) extruding by using a 1400t copper profile extruder at an extrusion speed of 3m/s, and performing water quenching to normal temperature after extrusion. Repeating the extrusion twice, and reducing the diameter by half to obtain
The copper-iron alloy extrusion rod.
(6) Deformation strengthening: will be provided with
And carrying out cold rolling treatment on the copper-iron alloy extrusion rod. Cold rolling with a two-roller mill at a rolling speed of 4m/s by 7 passes of deformation (one fifth reduction in diameter)
And (5) rolling the copper-iron alloy rod.
(7) Aging strengthening: will be
And (3) carrying out aging treatment on the copper-iron alloy by rolling, wherein the aging treatment temperature is 500 ℃, and the time is 3 h.
(8) Deformation strengthening: will be provided with
And carrying out cold deformation drawing treatment on the copper-iron alloy rolling rod. Cold-drawing with a giant drawing machine at a drawing speed of 7m/s and a diameter of half to obtain
And (5) finishing the copper-iron alloy conducting rod.
TABLE 1
| Serial number | Item | The result of the |
| 1 | Tensile strength (MPa) | 590、597、592 |
| 2 | Brinell Hardness (HB) | 83.1、79.6、80.8 |
| 3 | Grain size (mm) | 0.03、0.03、0.03 |
| 4 | Conductivity (IACS) | 87.61％、86.12％、86.64％ |
The mechanical property and the electrical property test given in table 1 show that the copper-iron alloy conducting rod prepared by the method has good mechanical property and electrical property, and both meet the electrical requirements.
As shown in fig. 2, the invention also provides a vacuum arc-extinguishing chamber, which adopts the conductive rod manufactured by the processing method.
The existing high-strength high-conductivity Cu-Cr, Cu-Mo, Cu-Co, Cu-Ag and other materials are expensive, complex in preparation process and high in production cost, and have no feasibility of replacing the existing oxygen-free copper conducting rod. The conducting rod for the vacuum arc-extinguishing chamber and the processing method thereof are made of Cu-Fe alloy, have low cost and rich raw materials, and have Brinell hardness not less than 75HB, tensile strength not less than 580MPa and electric conductivity not less than 80% IACS after solid solution strengthening, aging strengthening, fine grain strengthening and deformation strengthening, thereby completely meeting the requirements of the conducting rod for the vacuum arc-extinguishing chamber, prolonging the service life of the conducting rod and quickly, reliably and safely cutting off a power supply in the using process.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A processing method of a conducting rod for a vacuum arc-extinguishing chamber is characterized by comprising the following steps:
smelting Cu, increasing power to smelt Fe after Cu is completely melted down, and reducing power to obtain molten liquid after Fe is completely melted down;
adding CuMg50, CuLa40 and CuCe40 intermediate alloy into the molten liquid; after the intermediate alloy is completely melted down, improving the power for refining; after refining and deslagging, reducing power, performing electromagnetic stirring, and casting to obtain a copper-iron alloy cast ingot; the copper-iron alloy cast ingot comprises the following components in percentage by weight: 3.5-6.5 wt% of Fe, 0.02-0.15 wt% of Mg, 0.02wt% of La, 0.05wt% of Ce and the balance of Cu;
cold-processing and peeling the copper-iron alloy cast ingot, and then carrying out homogenization annealing treatment; then carrying out grain refinement treatment to obtain a copper-iron alloy extrusion rod;
carrying out cold rolling treatment, aging treatment and cold deformation drawing treatment on the copper-iron alloy extrusion rod in sequence to obtain a copper-iron alloy conducting rod;
the homogenization annealing treatment temperature is 900-950 ℃, the time is 4-6 hours, and the homogenization annealing treatment is carried out in a protective atmosphere;
the refined crystal grain treatment is to extrude by adopting a 1400t copper section extruder at an extrusion speed of 2-3 m/s, perform water quenching to normal temperature after extrusion, and repeatedly extrude for multiple times to obtain a copper-iron alloy extrusion rod;
in the cold rolling treatment, the rolling speed is 2-4 m/s, and the rod is rolled through 5-7 passes of deformed copper-iron alloy;
the aging strengthening treatment temperature is 400-500 ℃, and the time is 1-3 h;
the cold deformation drawing treatment specifically comprises the following steps: and (5) carrying out cold drawing processing by using a giant drawing machine, wherein the drawing speed is 5-7 m/s.
2. The method for manufacturing a conductive rod for a vacuum interrupter according to claim 1, wherein: the Cu and the Fe need to be cleaned before smelting, and the cleaning process comprises the following steps:
carrying out acid washing, water washing and drying treatment on cathode copper and industrial pure iron for later use; the cathode copper pickling solution adopts 30% volume concentration sulfuric acid, and the industrial pure iron pickling solution adopts 25% volume concentration hydrochloric acid.
3. The method for processing the conducting rod for the vacuum arc-extinguishing chamber as claimed in claim 1, wherein the conducting rod has Brinell hardness not less than 75HB, tensile strength not less than 580MPa, and electric conductivity not less than 80% IACS.
4. A vacuum interrupter, comprising a conductive rod for a vacuum interrupter manufactured by the method according to any one of claims 1 to 3.
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| JP4257668B2 (en) * | 1998-10-15 | 2009-04-22 | Ｄｏｗａホールディングス株式会社 | Copper alloy for lead frame with excellent etching processability and its manufacturing method |
| CN102888525B (en) * | 2012-10-31 | 2015-05-20 | 河海大学 | Processing method of high-obdurability and high-conductivity copper magnesium alloy |
| CN107475559B (en) * | 2017-09-21 | 2019-06-18 | 中国西电电气股份有限公司 | A kind of high-strength highly-conductive high thermal stability chrome zirconium copper alloy and preparation method thereof |
| CN108456799B (en) * | 2018-04-17 | 2019-10-11 | 沈阳赛美特新材料科技有限公司 | A kind of high-performance copper ferroalloy materials and its electroslag remelting preparation method |
| CN110144486B (en) * | 2019-06-04 | 2020-11-06 | 中北大学 | Preparation method of high-strength high-conductivity copper alloy |
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