WO2015060022A1 - 真空バルブ用電気接点およびその製造方法 - Google Patents
真空バルブ用電気接点およびその製造方法 Download PDFInfo
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- WO2015060022A1 WO2015060022A1 PCT/JP2014/073429 JP2014073429W WO2015060022A1 WO 2015060022 A1 WO2015060022 A1 WO 2015060022A1 JP 2014073429 W JP2014073429 W JP 2014073429W WO 2015060022 A1 WO2015060022 A1 WO 2015060022A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F3/26—Impregnating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
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- B22—CASTING; POWDER METALLURGY
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/12—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of 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
- C22C1/04—Making non-ferrous alloys by powder metallurgy
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0425—Copper-based alloys
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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
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- C22C1/045—Alloys based on refractory metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
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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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- 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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- 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
- H01H33/6643—Contacts; Arc-extinguishing means, e.g. arcing rings having disc-shaped contacts subdivided in petal-like segments, e.g. by helical grooves
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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
- H01H33/666—Operating arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2201/00—Treatment under specific atmosphere
- B22F2201/10—Inert gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2201/00—Treatment under specific atmosphere
- B22F2201/20—Use of vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2301/00—Metallic composition of the powder or its coating
- B22F2301/10—Copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2301/00—Metallic composition of the powder or its coating
- B22F2301/20—Refractory metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2201/00—Contacts
- H01H2201/022—Material
- H01H2201/03—Composite
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2205/00—Movable contacts
- H01H2205/002—Movable contacts fixed to operating part
Definitions
- the present invention relates to an electrical contact for a vacuum valve and a manufacturing method thereof.
- Cu-Cr contact materials have been widely used for electrical contacts of power switches such as vacuum circuit breakers and vacuum switch gears.
- This is a structure in which Cr particles, which are arc-resistant components, are dispersed in a Cu matrix with excellent current-carrying performance, and withstand voltage performance is provided by the moderate electron emission properties of Cr, high melting point, and arc resistance. It is. Therefore, if the Cr content is increased, the high withstand voltage performance is improved, but the Cu content is relatively reduced, and the energization / breaking performance is degraded. For this reason, in the Cu-Cr system electrical contact, the energization / breaking performance and the withstand voltage performance are in a reciprocal relationship and it is difficult to achieve both.
- Patent Document 1 discloses a Mo-Cr-Cu-based material as an electrical contact corresponding to this problem.
- This contact material has a structure in which Cu is uniformly dispersed in the matrix of a Mo—Cr fine alloy, which is an arc resistant component, and it is said that arc resistance is improved and an increase in contact resistance can be suppressed.
- An object of the present invention is to improve energization / breaking performance and withstand voltage performance.
- FIG. 2 is a cross-sectional view showing the structure of the electrode of Example 1.
- FIG. 3 is a schematic diagram showing a cross-sectional structure of the electrical contact of Example 1.
- FIG. 4 is a diagram showing a structure of a vacuum valve of Example 2.
- FIG. 6 is a diagram illustrating the structure of a vacuum circuit breaker according to the third embodiment.
- the present inventors refined the Cu agglomerated phase dispersed in the Mo—Cr—Cu matrix. By increasing the amount of Cu contained in the parent phase, we investigated improving the electrical conductivity and breaking performance by improving the electrical conductivity of the entire electrical contact.
- the particle size of the Cu agglomerated phase and the Cu content in the Mo-Cr-Cu matrix are thought to depend on the melting and impregnation route of Cu in the Mo-Cr compact, that is, the porosity.
- the porosity after heating the powder was measured.
- a mixed powder having a composition of 77 wt% Mo-23 wt% was press-molded at a pressure of 294 MPa to prepare a green compact.
- the porosity of the green compact after being held at 400 to 1100 ° C. for 1 hour in a vacuum was measured to be 42% after heating at 400 ° C., whereas it was 35 after heating at 1100 ° C. %, The higher the heating temperature, the smaller the porosity.
- the electrical contact of this embodiment can be obtained by the following method. First, Cr and Mo powders are mixed, and the mixed powder is pressure-molded to produce a green compact. This green compact is melt impregnated with Cu.
- the atmosphere for melting and impregnating is preferably an inert gas atmosphere such as Ar or an environment (high vacuum) decompressed from the atmosphere because Cu is not easily oxidized.
- the green compact is sintered with heat when impregnating with Cu.
- the simultaneous impregnation and sintering of Cu suppresses the diffusion between Mo-Cr and secures the Cu impregnation route, and the Mo-Cr-Cu matrix contains more Cu than before.
- the size of pores accompanying Mo—Cr diffusion can be kept small, and the size of the Cu agglomerated phase formed by Cu entering the pores can be controlled to 4 to 20 ⁇ m.
- the electrical contact of the present embodiment has a structure in which an aggregate phase of Cu having a particle size of 4 to 20 ⁇ m is dispersed in a matrix containing Mo—Cr—Cu, and when the Cu amount of the entire electrical contact is Wt, The amount of Cu (Wm) in the matrix is expressed as C ⁇ Wt, and C is 0.54 to 0.81.
- the parent phase is composed of a ternary system of Mo-Cr-Cu, and the electrical conductivity of the electrical contacts is remarkably improved by including a large amount of Cu, which is a good electrical conductor, in the parent phase.
- the parent phase contains a small amount of inevitable elements other than the three components of Mo—Cr—Cu.
- the particle diameter of the interspersed Cu agglomerated phase can be kept relatively small, the Cu agglomerated phase can be more uniformly dispersed in the electrical contact, contributing to an improvement in conductivity. Since the amount of Cu in the matrix phase is proportional to the amount of Cu in the entire electrical contact, the material composition design for obtaining desired electrical characteristics becomes easy, and Cu is three-dimensionally connected in the matrix phase, A conductive path including a Cu agglomerated phase is formed. As described above, when the conductivity is improved, the energization performance and the interruption performance are improved.
- the composition of the entire electrical contact is 40-60% by weight of Mo and 10-20% by weight of Cr, with the balance being Cu and inevitable impurities.
- This composition containing a large amount of Mo and Cr, sufficient high voltage resistance can be exhibited.
- the Mo-Cr-Cu parent phase in which Cu is finely infiltrated into the skeleton formed by moderate diffusion of Mo-Cr can be formed, and the size of the Cu agglomerated phase can be reduced. Even if it does not add, it is excellent in electroconductivity as mentioned above, and can improve electricity supply performance and interruption
- the Mo—Cr—Cu matrix has a crystal grain size of less than 4 ⁇ m and contains the above amount (Wm) of Cu, so that the Cu in the matrix is three-dimensionally connected and exhibits high conductivity. Moreover, since the amount of Mo and Cr can be increased to a total of 80 wt% by setting the Cu amount of the Cu agglomerated phase in the entire electrical contact to 20 wt% or less, high withstand voltage can be obtained.
- the electrical contact of the present embodiment has a disc shape, and the outer peripheral portion of one surface is joined to a cup-shaped current-carrying member. With this shape, when current is cut off by separating two opposing electrical contacts, a longitudinal magnetic field can be generated between the contacts, and an arc generated between the contacts can be confined by the magnetic field and extinguished. Thereby, the electrode which has the outstanding electric current interruption performance is obtained.
- the disk-shaped electrical contact has a center hole formed at the center of the circle and a plurality of through slit grooves formed from the center of the circle toward the outer periphery without contacting the center hole. Shape.
- the vacuum valve of the present embodiment includes a pair of fixed and movable electrodes in a vacuum vessel, and at least one of the fixed and movable electrodes is made of the electrode of the present embodiment.
- the power switch such as a vacuum circuit breaker or a vacuum switchgear is provided with an opening / closing means for connecting a plurality of vacuum valves of this embodiment in series with a conductor and driving a movable side electrode.
- FIG. 1 is a cross-sectional view showing the structure of the manufactured electrode 100.
- 1 is an electrical contact
- 2 is a slit groove for giving a driving force to the arc
- 3 is a reinforcing plate made of stainless steel
- 4 is an electrode rod
- 5 is a brazing material
- 44 is an arc in the center of the electrical contact 1 It is a central hole to prevent it from occurring and stagnating.
- the manufacturing method of the electrical contact 1 of the example shown in Table 1 is as follows. First, a predetermined amount of Mo powder (average particle size 3 ⁇ m) and Cr powder (particle size 60 ⁇ m or less) are mixed, and this mixed powder is put into a 70 mm diameter mold and pressed at a pressure of 157 to 294 MPa. A powder was obtained. At this time, the mixing ratio of the Mo powder and the Cr powder and the molding pressure were adjusted so that the composition after melt-impregnation with Cu had a value shown in Table 1. If the pressure is smaller than 157 MPa, the molded body collapses when impregnated with Cu, and the structure and composition become non-uniform. Therefore, the molding pressure is preferably 157 MPa or more. Next, put a predetermined amount of the oxygen-free copper ingot on the green compact, 10-2 heated Pa range 1160 ° C. ⁇ 2 hours in a vacuum of melt impregnated with Cu, produce electrical contact 1 material did.
- FIG. 2 (a) shows a cross-sectional structure of Example No. 3
- FIG. 2 (b) shows a cross-sectional structure of Comparative Example No. 8 in a schematic view.
- the conductivity shown in Table 1 is a result of measurement using an eddy current conductivity meter in an arbitrary cross section, and is shown as a relative value (IACS) with the conductivity of annealed pure copper being 100%.
- composition ranges of Examples No. 1 to No. 7 are 40-60% by weight of Mo, 10-20% by weight of Cr, and Cu makes the balance. Further, when the total amount of Cu in the entire electrical contact is Wt and the Cu content (Wm) in the Mo—Cr—Cu matrix is expressed by C ⁇ Wt, C is in the range of 0.54 to 0.81. Further, the particle size of the Cu agglomerated phase is 4 to 20 ⁇ m, and the total amount is 20% by weight or less.
- Comparative Examples No. 9 and No. 10 have an overall composition outside the range of the examples.
- the total amount of Cu is small, a Cu agglomerated phase does not occur, and the structure is composed only of the Mo—Cr—Cu matrix.
- the obtained material was machined to produce an electrical contact 1 having a diameter of 65 mm shown in FIG.
- the manufacturing method of the electrode 100 is as follows.
- the electrode rod 4 is made of oxygen-free copper and the reinforcing plate 3 is made of SUS304 in advance by machining, and the brazing material 5 is placed between the electrical contact 1, the reinforcing plate 3 and the electrode rod 4 obtained above. This was heated at 970 ° C. for 10 minutes in a vacuum of 8.2 ⁇ 10 ⁇ 4 Pa or less to produce the electrode 100 shown in FIG. If the strength of the electrical contact 1 is sufficient, the reinforcing plate 3 may be omitted.
- FIG. 3 is a diagram showing the structure of the vacuum valve of this embodiment.
- the rated specifications of the vacuum valve 200 are a voltage of 24 kV, a current of 1250 A, and a cutoff current of 25 kA.
- 1a is a stationary electrical contact
- 1b is a movable electrical contact
- 3a and 3b are reinforcing plates
- 4a is a stationary electrode rod
- 4b is a movable electrode rod.
- the fixed side electrode 6a (100) and the movable side electrode 6b (100) are configured using these members.
- the grooves of the electric contacts on the fixed side and the movable side are installed so as to coincide with each other on the contact surface.
- the movable electrode 6b is brazed and joined to the movable holder 12 via a movable shield 8 that prevents scattering of metal vapor or the like at the time of interruption. These are brazed and sealed by the fixed side end plate 9a, the movable side end plate 9b, and the insulating cylinder 13 and kept at a high vacuum.
- the fixed side electrode 6a and the threaded portion of the movable side holder 12 are connected to the external conductor.
- a shield 7 is provided on the inner surface of the insulating cylinder 13 to prevent scattering of metal vapor at the time of interruption, and a guide 11 for supporting a sliding portion is provided between the movable side end plate 9b and the movable side holder 12. Provided.
- a bellows 10 is provided between the movable side shield 8 and the movable side end plate 9b, and the movable side holder 12 is moved up and down while keeping the inside of the vacuum valve in a vacuum, thereby opening and closing the fixed side electrode 6a and the movable side electrode 6b. be able to.
- FIG. 4 is a configuration diagram of a vacuum circuit breaker 300 showing the vacuum valve 14 (200) of this embodiment and its operating mechanism.
- the vacuum circuit breaker 300 has a structure in which the operation mechanism is disposed on the front surface and three sets of three-phase epoxy cylinders 15 supporting the vacuum valve 14 (200) are disposed on the rear surface.
- the vacuum valve 14 (200) is opened and closed by an operating mechanism via the insulating operating rod 16.
- Example 1 The electrical contact 1 produced in Example 1 was used for the vacuum valve 200 shown in Example 2 and mounted on the vacuum circuit breaker 300 shown in Example 3 to perform a performance test.
- Table 1 shows the maximum interrupting current value and the quality of maintaining the withstand voltage performance after the current interrupting.
- the rated specifications of this vacuum valve 200 are voltage 24kV, current 1250A, cut-off current 25kA, the maximum cut-off current value required for practical use is 35kA, and the withstand voltage performance is 50kV at commercial frequencies, so the maximum cut-off current value>
- the one with 35 kA was rated as ⁇ , and the one that could maintain the voltage of 50 kV even after interruption was marked as ⁇ .
- the composition, the amount of Cu in the Mo—Cr—Cu matrix, the particle size of the Cu agglomerated phase, etc. are within the appropriate ranges, and good electrical conductivity, The withstand voltage state could be maintained well with a breaking current value of 35 kA or more.
- No. 8 had sufficient electrical conductivity of the entire contact, and the withstand voltage performance after breaking was maintained. However, because it forms a heterogeneous structure interspersed with relatively large grain size Cu agglomerated phases, the volatilization of Cu due to arc heating occurs non-uniformly, the current interrupting behavior is unstable, and the maximum interrupting current value is 35 kA or less And the shut-off performance was insufficient.
- No. 9 contains a large absolute amount of Cu and has high conductivity, so the maximum breaking current value is relatively high, but the withstand voltage performance is insufficient due to the small amount of Mo-Cr.
- No. 10 has a low absolute amount of Cu, so the electrical conductivity is remarkably low, the breaking performance is insufficient, and the contact surface roughness after current interruption is large and induces discharge between the contacts, so the withstand voltage performance is maintained. Was not.
- the electrical contacts of the examples can achieve high withstand voltage and large current interruption, and can be applied to a relatively large capacity power switch.
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Abstract
Description
Claims (9)
- MoとCrとCuとを含む母相中に、Cuを含む凝集相が分散した電気接点において、
前記凝集相の最大粒径が4~20μmの範囲にあり、
前記電気接点全体のCu量をWtとしたときの前記母相中のCu量はC×Wtで表され、Cは0.54~0.81の範囲にあることを特徴とする電気接点。 - 請求項1において、前記電気接点全体の組成が40~60重量%のMoと、10~20重量%のCrと、残部がCuおよび不可避の不純物とからなることを特徴とする電気接点。
- 請求項1または2において、前記母相の結晶粒径は、4μm未満であることを特徴とする電気接点。
- 請求項1乃至3の何れかにおいて、前記凝集相中のCu量は、前記電気接点全体の20重量%以下であることを特徴とする電気接点。
- 円盤形状の請求項1乃至4の何れかの電気接点と、前記電気接点の一方の面に設けられた電極棒とを備えることを特徴とする電極。
- 真空容器内に一対の固定側電極及び可動側電極を備えた真空バルブにおいて、前記固定側電極及び可動側電極の少なくとも一方が、請求項5の電極であることを特徴とする真空バルブ。
- 請求項6の真空バルブを導体によって直列に複数接続し、前記可動側電極を駆動する開閉手段を備えることを特徴とする電力開閉器。
- MoとCrとCuとを含む電気接点の製造方法において、
Mo粉末とCr粉末の混合粉を加圧成形して圧粉体を形成する工程と、溶融したCuを前記圧粉体に含浸する工程とを含むことを特徴とする電気接点の製造方法。 - 請求項8において、前記溶融したCuを前記圧粉体に含浸する工程は、不活性ガス雰囲気下または減圧下で行うことを特徴とする電気接点の製造方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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KR1020157036395A KR20160013153A (ko) | 2013-10-23 | 2014-09-05 | 진공 밸브용 전기 접점 및 그 제조 방법 |
EP14856560.9A EP3062327A1 (en) | 2013-10-23 | 2014-09-05 | Electrical contact for vacuum valve and process for producing same |
CN201480035785.4A CN105324828A (zh) | 2013-10-23 | 2014-09-05 | 真空阀用电接点及其制造方法 |
US14/900,240 US20160141126A1 (en) | 2013-10-23 | 2014-09-05 | Electrical Contact for Vacuum Interrupter and Process for Producing Same |
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JP2013219736A JP6051142B2 (ja) | 2013-10-23 | 2013-10-23 | 真空バルブ用電気接点およびその製造方法 |
JP2013-219736 | 2013-10-23 |
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US (1) | US20160141126A1 (ja) |
EP (1) | EP3062327A1 (ja) |
JP (1) | JP6051142B2 (ja) |
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Publication number | Priority date | Publication date | Assignee | Title |
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US9842713B2 (en) * | 2016-03-30 | 2017-12-12 | Eaton Corporation | Vacuum circuit interrupter |
JP6781514B2 (ja) * | 2016-04-22 | 2020-11-04 | 株式会社日立製作所 | ガス遮断器、及びガス絶縁開閉装置用遮断器 |
US10923298B1 (en) * | 2020-04-02 | 2021-02-16 | Eaton Intelligent Power Limited | Compact pole unit for fast switches and circuit breakers |
KR102372776B1 (ko) * | 2020-10-26 | 2022-03-10 | 한국생산기술연구원 | Cu-Cr-Mo에 세라믹을 포함한 전기접점소재 제조방법 |
CN117802378B (zh) * | 2024-02-29 | 2024-04-30 | 东北大学 | 一种具有多尺度结构的钨铜复合材料及其制备方法 |
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JPH1012103A (ja) * | 1996-06-21 | 1998-01-16 | Hitachi Ltd | 真空遮断器及びそれに用いる真空バルブと電気接点 |
JP4404980B2 (ja) * | 1999-02-02 | 2010-01-27 | 芝府エンジニアリング株式会社 | 真空バルブ |
US20090145883A1 (en) * | 2005-04-16 | 2009-06-11 | Abb Technology Ag | Method for Producing Contact Makers for Vacuum Switching Chambers |
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CN101617376B (zh) * | 2006-12-15 | 2011-08-24 | Abb研究有限公司 | 触点元件 |
JP2009158216A (ja) * | 2007-12-26 | 2009-07-16 | Japan Ae Power Systems Corp | 真空遮断器の電極接点部材及びその製造方法 |
WO2011162398A1 (ja) * | 2010-06-24 | 2011-12-29 | 株式会社日本Aeパワーシステムズ | 真空遮断器用電極材料の製造方法、真空遮断器用電極材料及び真空遮断器用電極 |
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- 2014-09-05 CN CN201480035785.4A patent/CN105324828A/zh active Pending
- 2014-09-05 US US14/900,240 patent/US20160141126A1/en not_active Abandoned
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JP2002075143A (ja) * | 2000-09-04 | 2002-03-15 | Hitachi Ltd | 真空遮断器に用いる真空バルブ用電極及びその製造方法 |
JP2012007203A (ja) | 2010-06-24 | 2012-01-12 | Japan Ae Power Systems Corp | 真空遮断器用電極材料の製造方法及び真空遮断器用電極材料 |
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CN105324828A (zh) | 2016-02-10 |
KR20160013153A (ko) | 2016-02-03 |
JP2015082402A (ja) | 2015-04-27 |
EP3062327A1 (en) | 2016-08-31 |
JP6051142B2 (ja) | 2016-12-27 |
US20160141126A1 (en) | 2016-05-19 |
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