CN106997811A - A kind of method that electron beam infiltration prepares copper tungsten contact - Google Patents
A kind of method that electron beam infiltration prepares copper tungsten contact Download PDFInfo
- Publication number
- CN106997811A CN106997811A CN201710182367.3A CN201710182367A CN106997811A CN 106997811 A CN106997811 A CN 106997811A CN 201710182367 A CN201710182367 A CN 201710182367A CN 106997811 A CN106997811 A CN 106997811A
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- Prior art keywords
- electron beam
- copper
- infiltration
- copper wire
- tungsten contact
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/025—Composite material having copper as the basic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/04—Casting by dipping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/023—Composite material having a noble metal as the basic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
Abstract
The invention discloses a kind of method that electron beam infiltration prepares copper tungsten contact, including following sequential steps：S1. contact material is produced；S2. Heat-Source Parameters are set according to electron beam fuse equipment；S3. preheating tungsten base is defocused using electron-beam sustainer in graphite boat；S4. adjustment electron beam and copper wire orientation relationship, and by the reciprocation between high-speed motion electron beam and copper wire, produce energy conversion molten metal copper wire；S5. with constant speed mobile working platform；S6. return to step s4, until infiltration process terminates.Advantage of the invention is that：Electron beam infiltration method is especially suitable for small lot, mass fraction and matches different copper-tungstens preparations, and manufacturing process only needs to calculate the copper wire length for meeting mass fraction requirement；The vacuum environment that electron beam device possesses is adapted to the preparation of copper alloy, and oxidation can be avoided to greatest extent, improves infiltration effect.
Description
Technical field
The present invention relates to contact material field, more particularly to a kind of method that electron beam infiltration prepares copper tungsten contact.
Background technology
Electrical contact is important contact element in high-voltage switch gear and breaker, at present the more ripe high-voltage electric contact material of application
Expect for Cu tailings.Copper tungsten contact material is because extensive with good resistance to arc erosion, resistance fusion welding and high intensity
Applied to various high-voltage switch gears and breaker.Copper tungsten contact material traditional preparation methods are powder metallurgic method and infiltration method：1. powder
Last metallurgy method：A certain amount of tungsten powder and copper powder are mixed and match somebody with somebody compacting sintering shaping after powder；2. infiltration method：Tungsten powder is suppressed in a mold
Sinter the W skeleton base with certain porosity into, it is stacked with leaching copper sheet and is placed in vacuum or atmosphere protection environment, plus
Heat arrives copper fusing point above certain temperature, and liquid copper is immersed in W skeleton hole by capillarity, finally gives copper tungsten whole
Body infiltration material.
But both the above process has respective drawback：The electric conductivity of contact material prepared by powder metallurgic method and heat conduction
Property, mechanical performance are poor compared with infiltration method.And infiltration method is used as now widely used contact material preparation method, production process needs
The aided processes such as Making mold, blank sintering, overall infiltration, therefore the production cycle is longer, be adapted to the production of high-volume part.It is right
Short product is required in small lot, Lead Time, this method is not obviously applied to yet.
The current technology using electron beam as thermal source is mainly used in welding, thing and mutually deposits, drills, increasing the fields such as material shaping,
Application is there is no in infiltration field.Electron beam infiltration is by thermal source of high-energy-density electronic beam current and metal wire material reciprocation,
Metal wire material is set to be immersed after melting in base substrate, so as to realize infiltration process.
Publication No. CN101279365A patent of invention, discloses a kind of copper tungsten electrical contact material of high arc resistant ablation
Preparation method.This method is carried out according to the following steps：Copper powder, tungsten powder and rare earth simple substance are weighed in proportion first, then by 20
~40% copper powder, tungsten powder and rare earth simple substance, which is placed in high energy ball mill, carries out mechanical alloying；Again by remaining copper powder, tungsten
Powder and the nickel powder and ethanol of addition carry out common mechanical mixture；It is compressing in a mold；Pressed compact is finally loaded into high temperature dwell
It using infiltration technique sinter molding is that can obtain to protect in atmosphere sintering furnace.
The content of the invention
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：A kind of electron beam infiltration prepares copper tungsten
The method of contact, it is characterised in that including following sequential steps：
S1. contact material is produced；
S2. Heat-Source Parameters are set according to electron beam fuse equipment；
S3. preheating tungsten base is defocused using electron-beam sustainer in graphite boat；
S4. adjustment electron beam and copper wire orientation relationship, and by the reciprocation between high-speed motion electron beam and copper wire,
Produce energy conversion molten metal copper wire；
S5. with constant speed mobile working platform；
S6. return to step s4, until infiltration process terminates.
Further, step s1 comprises the following steps：
S11. the mass fraction of copper is set；
S12. according to copper tungsten contact diameter, copper tungsten contact height, copper tungsten contact density, copper wire density and gage of wire meter
Calculate and meet copper wire length in sample required for Copper mass fraction requirement.
Further, the Heat-Source Parameters in step s2 include beam parameters, focusing current parameters and velocity
Parameter, wherein, the velocity parameter also includes wire feed rate and working table movement speed.
Further, step s2 is also needed to set the infiltration time, i.e., the melting of copper wire is completed within the infiltration time of setting
Process.
Further, in step s3, electron-beam sustainer defocuses preheating tungsten base to 1400 DEG C of ± 50 DEG C of temperature.
Further, in step s4, adjustment electron beam and copper wire orientation relationship, it is ensured that beam energy concentrates on copper wire point
End.
Further, above-mentioned steps are operated under vacuum conditions, and vacuum is less than 10-2Pa。
In addition, a kind of electron beam fuse equipment is also disclosed, including vacuum chamber, the vacuum chamber is interior to include workbench, institute
State and graphite boat is provided with workbench, be provided with the graphite boat above tungsten base, the vacuum chamber and be additionally provided with electron gun, the electricity
Sub- rifle is used to produce and launching electronics beam, and the wire feeding disc of winding copper wire is additionally provided with outside the vacuum room.
Further, the outer connected control system of the electron beam fuse equipment and high voltage power supply.
Compared with prior art, advantage of the invention is that：1. it is time saving same without tungsten powder and copper powder mixing process
When avoid due to the element metallurgyization that high speed batch mixing is caused；2. the especially suitable small lot of electron beam infiltration method, mass fraction are matched somebody with somebody
Prepared than different copper-tungstens, manufacturing process only needs to calculate the copper wire length for meeting mass fraction requirement；3. electron beam device
The vacuum environment possessed is adapted to the preparation of copper alloy, and oxidation can be avoided to greatest extent, improves infiltration effect.And vacuum environment
Middle metal liquid angle of wetting is relatively small, more conducively infiltration.
Brief description of the drawings
Fig. 1 is the step flow chart for the method that electron beam infiltration of the present invention prepares copper tungsten contact；
Fig. 2 is the structural representation of electron beam fuse equipment of the present invention.
Embodiment
Below with reference to accompanying drawing 1 and accompanying drawing 2, various embodiments of the present invention are given with further elaboration.
In fig. 1, a kind of method that electron beam infiltration prepares copper tungsten contact, including following sequential steps：
Step 1: producing W-A (wt%) Cu contact materials.Firstly the need of the mass fraction of setting copper, by the quality of copper point
It is several to be represented with A, and according to copper tungsten contact diameter, copper tungsten contact height, copper tungsten contact density, copper wire density and gage of wire meter
Calculate and meet copper wire length in sample required for Copper mass fraction requirement.We by copper tungsten contact diameter, copper tungsten contact height,
Copper tungsten contact density, copper wire density, gage of wire and copper wire length are represented with d, H, ρ 2, ρ 1, Ф and L respectively.Last root
According to formula：
Calculate copper wire length.In practical operation, the density parameter of copper tungsten contact can be can obtain according to existing infiltration method.
Further, the contact material includes contact part and conductive bar part, and tungsten of the contact part along head to afterbody contains
Amount is reduced successively.In this specific embodiment, the W content on contact part head can be set to 85%wt~95%wt, its afterbody
W content be 50%wt~60%wt.
Step 2: setting Heat-Source Parameters according to electron beam fuse equipment；Heat-Source Parameters in step s2 include beam parameters,
Focusing current parameters and velocity parameter, velocity parameter also include wire feed rate and working table movement speed.Wherein,
Wire feed rate is represented with Vf.Meanwhile, also need to set the infiltration time in step s2, the infiltration time represents that the infiltration time can with T
To be obtained by copper wire length and wire feed Time Calculation, i.e., the melting process of copper wire is completed within the infiltration time of setting.Entirely
Infiltration process is time saving while avoiding due to the element metallurgy that high speed batch mixing is caused without tungsten powder and copper powder mixing process
Change.Circular is：
Step 3: defocusing preheating tungsten base using electron-beam sustainer in graphite boat, electron-beam sustainer defocuses preheating tungsten base extremely
1400 DEG C of ± 50 DEG C of temperature.Specifically, it is necessary first to which the tungsten base with certain interval degree sinter molding is placed in graphite boat.
It is more suitable in the range of 37%-40% that the clearence degree of tungsten base is controlled, and the pressure of tungsten base can subtract therewith the increase of clearence degree
It is small.
Step 4: adjustment electron beam and copper wire orientation relationship, it is ensured that beam energy concentrates on copper wire tip, and passes through height
Reciprocation between fast moving electron beam and copper wire, produces energy conversion molten metal copper wire, copper wire is after melting with big
Particle molten drop form enters tungsten base, and metal drop is penetrated into by capillary force in the gap of W skeleton.
Step 5: with constant speed mobile working platform, constant speed is represented with Vs；
Step 6: before infiltration process finishes, electron beam and copper wire orientation relationship can be adjusted in operation repeatedly, it is ensured that electricity
Beamlet energy concentrates on copper wire tip, and by the reciprocation between high-speed motion electron beam and copper wire, produces energy conversion
Molten metal copper wire, until infiltration process terminates.
Above-mentioned steps are operated under vacuum conditions, and vacuum is less than 10-2Pa.Because metal in vacuum environment
Liquid angle of wetting is relatively small, more conducively infiltration.
Concrete technology flow process is as follows：First in whole technological process, it is held in the environment of vacuum and is operated, copper
Silk enters tungsten base after melting in bulky grain molten drop form, and metal drop penetrates into the gap of W skeleton by capillary force
In, and by the lasting focusing of electron beam, copper-tungsten is formed, obtained copper-tungsten is again by electron beam together with copper wire
It is lasting to focus on, infiltration process is completed, persistently defocusing for electron beam is eventually passed, alloy surface is modified.
Further referring to accompanying drawing 2, in addition, a kind of electron beam fuse equipment is also disclosed, including vacuum chamber 1, vacuum chamber 1
Interior to be provided with workbench 2 in graphite boat 3, graphite boat 3 and be provided with tungsten base 4 including workbench 2, the top of vacuum chamber 1 is additionally provided with electronics
Rifle 5, electron gun 5 is used to produce and launching electronics beam, and the wire feeding disc 6 of winding copper wire is additionally provided with outside vacuum chamber 1.Electron beam fuse is filled
The preparation that possessed vacuum environment is adapted to copper alloy is put, oxidation can be avoided to greatest extent, infiltration effect is improved.
Further, the outer connected control system 7 of electron beam fuse equipment and high voltage power supply 8.
The above, only presently preferred embodiments of the present invention, are not intended to limit embodiment of the present invention, and this area is general
Logical technical staff can very easily carry out corresponding flexible or change according to the central scope and spirit of the present invention, therefore this
The protection domain of invention should be defined by the protection domain required by claims.
Claims (9)
1. a kind of method that electron beam infiltration prepares copper tungsten contact, it is characterised in that including following sequential steps：
S1. contact material is produced；
S2. Heat-Source Parameters are set according to electron beam fuse equipment；
S3. preheating tungsten base is defocused using electron-beam sustainer in graphite boat；
S4. adjustment electron beam and copper wire orientation relationship, and by the reciprocation between high-speed motion electron beam and copper wire, are produced
Energy changes molten metal copper wire；
S5. with constant speed mobile working platform；
S6. return to step s4, until infiltration process terminates.
2. the method that electron beam infiltration as claimed in claim 1 prepares copper tungsten contact, it is characterised in that step s1 includes following
Step：
S11. the mass fraction of copper is set；
S12. calculated according to copper tungsten contact diameter, copper tungsten contact height, copper tungsten contact density, copper wire density and gage of wire
Meet the copper wire length required for Copper mass fraction requirement in sample.
3. the method that electron beam infiltration as claimed in claim 1 prepares copper tungsten contact, it is characterised in that described in step s2
Heat-Source Parameters include beam parameters, focusing current parameters and velocity parameter, wherein, the velocity parameter also includes
Wire feed rate and working table movement speed.
4. the method that electron beam infiltration as claimed in claim 1 prepares copper tungsten contact, it is characterised in that step s2 also needs to set
Put the infiltration time, i.e., the melting process of copper wire is completed within the infiltration time of setting.
5. the method that electron beam infiltration as claimed in claim 1 prepares copper tungsten contact, it is characterised in that in step s3, electronics
Shu Chixu defocuses preheating tungsten base to 1400 DEG C of ± 50 DEG C of temperature.
6. the method that electron beam infiltration as claimed in claim 1 prepares copper tungsten contact, it is characterised in that in step s4, adjustment
Electron beam and copper wire orientation relationship, it is ensured that beam energy concentrates on copper wire tip.
7. the electron beam infiltration as described in claim 1~6 is prepared as described in any one of method of copper tungsten contact, above-mentioned steps
Operated under vacuum conditions, vacuum is less than 10-2Pa。
8. a kind of electron beam fuse equipment, including vacuum chamber, it is characterised in that include workbench, the work in the vacuum chamber
Make to be provided with graphite boat on platform, be provided with the graphite boat above tungsten base, the vacuum chamber and be additionally provided with electron gun, the electron gun
For generation and launching electronics beam, the wire feeding disc of winding copper wire is additionally provided with outside the vacuum room.
9. electron beam fuse equipment as claimed in claim 8, the outer connected control system of the electron beam fuse equipment and high-tension electricity
Source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710182367.3A CN106997811B (en) | 2017-03-24 | 2017-03-24 | A kind of method that electron beam infiltration prepares copper tungsten contact |
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| CN201710182367.3A CN106997811B (en) | 2017-03-24 | 2017-03-24 | A kind of method that electron beam infiltration prepares copper tungsten contact |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107622899A (en) * | 2017-10-11 | 2018-01-23 | 陕西斯瑞新材料股份有限公司 | A kind of copper chromium composite contact mass production Preparation equipment and method |
| CN111508734A (en) * | 2020-03-26 | 2020-08-07 | 陕西斯瑞新材料股份有限公司 | Method for producing copper-tungsten contact by electron beam infiltration |
| CN114628179A (en) * | 2022-04-12 | 2022-06-14 | 西安西电开关电气有限公司 | Method for connecting copper-tungsten alloy and copper alloy |
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| CN102800420A (en) * | 2011-05-25 | 2012-11-28 | 河南新丰新材料有限公司 | Method for manufacturing copper-tungsten contact |
| CN105750548A (en) * | 2015-10-29 | 2016-07-13 | 西安智熔金属打印***有限公司 | Electron beam metal jet additive manufacturing apparatus and electron beam metal spray additive manufacturing method |
| CN106424732A (en) * | 2016-12-01 | 2017-02-22 | 西安智熔金属打印***有限公司 | Electron beam additive manufacturing device |
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2017
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009080936A (en) * | 2007-07-11 | 2009-04-16 | Katsuhiko Senda | Method to manufacture heating coil for high-frequency hardening in which required shape is integrally shaped out and joining of auxiliary component is executed by electron beam welding |
| CN102800420A (en) * | 2011-05-25 | 2012-11-28 | 河南新丰新材料有限公司 | Method for manufacturing copper-tungsten contact |
| CN105750548A (en) * | 2015-10-29 | 2016-07-13 | 西安智熔金属打印***有限公司 | Electron beam metal jet additive manufacturing apparatus and electron beam metal spray additive manufacturing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107622899A (en) * | 2017-10-11 | 2018-01-23 | 陕西斯瑞新材料股份有限公司 | A kind of copper chromium composite contact mass production Preparation equipment and method |
| CN111508734A (en) * | 2020-03-26 | 2020-08-07 | 陕西斯瑞新材料股份有限公司 | Method for producing copper-tungsten contact by electron beam infiltration |
| CN111508734B (en) * | 2020-03-26 | 2022-02-08 | 陕西斯瑞新材料股份有限公司 | Method for producing copper-tungsten contact by electron beam infiltration |
| CN114628179A (en) * | 2022-04-12 | 2022-06-14 | 西安西电开关电气有限公司 | Method for connecting copper-tungsten alloy and copper alloy |
| CN114628179B (en) * | 2022-04-12 | 2023-09-29 | 西安西电开关电气有限公司 | Copper-tungsten alloy and copper alloy connecting method |
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| CN106997811B (en) | 2019-03-05 |
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Denomination of invention: Method for preparing copper-tungsten contact through electron beam infiltration Effective date of registration: 20191213 Granted publication date: 20190305 Pledgee: Quzhou Kecheng District State owned Assets Management Co., Ltd Pledgor: XI'AN ZHIRONG METAL PRINTING SYSTEM CO., LTD. Registration number: Y2019330000312 |
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