CN109351977A - A kind of preparation method containing cored copper-chromium contact material - Google Patents
A kind of preparation method containing cored copper-chromium contact material Download PDFInfo
- Publication number
- CN109351977A CN109351977A CN201811205800.1A CN201811205800A CN109351977A CN 109351977 A CN109351977 A CN 109351977A CN 201811205800 A CN201811205800 A CN 201811205800A CN 109351977 A CN109351977 A CN 109351977A
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- Prior art keywords
- copper
- wire
- chromium
- iron wire
- contact
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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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
-
- 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
- H01H11/048—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by powder-metallurgical processes
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Contacts (AREA)
Abstract
The present invention relates to a kind of preparation methods containing cored copper-chromium contact material, the described method comprises the following steps: (1) by copper wire uniformly around outside pure iron silk, both ends are fixed；(2) iron wire for being wound with copper wire is lined up into array；(3) chromium powder body is filled in the gap of step (2), and carries out melting infiltration sintering.Of the invention when being used for contact containing cored copper-chromium contact material, the spontaneous regulation in contact surface magnetic field can drive the quick movement of vacuum arc and disperse, reduce the ablation of contact surface.
Description
Technical field
The present invention relates to copper-based composite contact material technical fields, are specifically related to a kind of containing cored copper chromium contact material
The preparation method of material.
Background technique
Contact is the heart of vacuum switch, plays key effect to the safe operation of switch.With the development of power industry
With being increasing for vacuum switch type, to vacuum contact material to super-pressure, diversification, high performance, to support vacuum to open
It closes and develops to extra-high voltage grade, special occasions and miniaturization.Although however in recent years, vacuum contact material is being made
Standby technological level obtains very big development, but is not carried out the breakthrough to super-pressure vacuum contact material, is unable to satisfy superelevation
Press the requirement of vacuum circuit breaker.Contact material becomes the bottleneck problem of EHV Vacuum Breaker.
In the prior art, have company to attempt to develop the vacuum contact material of 126kV above, by into one
To obtain preferable contact comprehensive electrochemical properties, vacuum interrupter magnetic field structure also starts to adopt Cr phase in step refinement CuCr alloy
More uniform Distribution of Magnetic Field is realized with the methods of Spiral structure.But by contact cup seat structure in the magnetic field of contact surface
Intensity is still lower, and the further ability for spreading and moving of driving arc cathode spot is limited, can not further decrease disjunction
The failure of disjunction caused by the high temperature locally generated in the process and restriking.
Therefore, research has the vacuum switch vacuum contact material of internal diversion micro-structure, inside contact material
Water conservancy diversion micro-structure, electrode surface generates stronger magnetic field, and generates stronger centered magnetic field in regional area and be expected in solution
State problem.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of preparation sides containing cored copper-chromium contact material
Method the described method comprises the following steps:
S1 by copper wire uniformly around outside pure iron silk, fix by both ends；
The iron wire for being wound with copper wire is lined up array by S2；
Chromium powder body is filled in the gap of S3 step S2, and carries out melting infiltration sintering.
In the present invention, the step S1 specifically includes: S11 and is by weight using chromium powder, copper wire and iron wire as raw material
(45-70): (20-50): it is spare that (1-10) weighs chromium powder, copper wire and iron wire respectively；Copper wire is wound on iron wire using 3D braiding；
The step S2 is specifically included: the iron wire for being wound with copper wire that S21 prepares step S11 lines up array；
The step S3 is specifically included: S31 fills chromium powder body in the gap of the step S21 array obtained；S32 is by step
S31 obtains product and carries out compacting sintering processing.
In step s 11, brass wire diameter 0.1-5.0mm, iron wire diameter are 0.1-5.0mm, between copper helix between
Away from for 0.1-5mm；
In step S31, the sintering carries out under vacuum.
In the step s 21, spacing 0.5-5mm.
In step s 32, sintering temperature is 1000-1400 DEG C, and melting infiltration sintering is used when control is sintered.
In step S31, the chromium powder body of 0.5-200 μm of average grain diameter of filling.
The present invention also provides made from the above method containing cored copper-chromium contact material, containing cored copper chromium contact
When material is used for contact, the spontaneous regulation in contact surface magnetic field can drive the quick movement of vacuum arc, reduce contact surface
Ablation.
The present invention achieves beneficial technical effect, the present invention is intended to provide a kind of preparation method of composite contact material,
The new paragon for using vacuum switch and the integrated design of contact material micro-structure is obtained by this method, solves to restrict high pressure vacuum
The bottleneck problem of breaker development.Specific method is to combine the New production technologies such as 3D braiding with traditional production technique, is made
The controllable novel evacuated contact material of standby micro-structure out, makes to generate spontaneous situ Magnetic Field inside contact, controls vacuum arc form
And motor behavior, fundamentally change and is currently relied upon contact Design of Mechanical Structure or the vertical or horizontal magnetic field control of additional coil generation
The method of electric arc processed is realized the spontaneous regulation in contact surface magnetic field to drive the quick movement and dispersion of vacuum arc, is prevented
The aggregation of electric arc is expected to that the ablation of contact surface is greatly lowered, solves the bottleneck problem of vacuum circuit breaker development.
Detailed description of the invention
Fig. 1 is the present invention containing cored microstructure unit schematic three dimensional views；
Fig. 2 is the present invention containing cored microstructure unit sectional view；
Fig. 3 is the electromagnetic field simulation drawing and transverse magnetic field distribution curve of microstructure unit array of the present invention.
Specific embodiment
Embodiments of the present invention are described more detail below, an embodiment of the invention is, the present invention is intended to provide
A kind of preparation method containing cored copper-chromium contact material, the described method comprises the following steps:
S1 by copper wire uniformly around outside pure iron silk, fix by both ends；
The iron wire for being wound with copper wire is lined up array by S2；
Chromium powder body is filled in the gap of S3 step S2, and carries out compacting sintering.
In another embodiment, the step S1 is specifically included: S11 is using chromium powder, copper wire and iron wire as raw material, by weight
Than for (45-70): (20-50): it is spare that (1-10) weighs chromium powder, copper wire and iron wire respectively；It is woven using 3D and copper wire is wound into iron
On silk；The step S2 is specifically included: the iron wire for being wound with copper wire that S21 prepares step S11 lines up array；The step S3 tool
Body includes: that S31 fills chromium powder body in the gap of the step S21 array obtained；S32 suppresses step S31 acquisition product
Sintering processes.
In any embodiment of the invention, in step s 11, brass wire diameter is 0.1-5.0 millimeters, and iron wire diameter is
0.1-5.0mm, the spacing between copper helix are 0.1-0.5mm；
In any embodiment of the invention, in step s 32, the sintering carries out under vacuum.
In any embodiment of the invention, in the step s 21, spacing 1.5-2.5mm.
In any embodiment of the invention, in step s 32, sintering temperature is 900-1100 DEG C,
In this embodiment, in step S31, the chromium powder body of 0.8-1.21 μm of average grain diameter of filling；
In this embodiment, using chromium powder, copper wire and iron wire as raw material, the weight ratio of chromium powder, copper wire and iron wire is 50: 45
: 5, it the described method comprises the following steps:
The copper wire of diameter 1mm is wrapped on the iron wire of 2.0mm by S11 using 3D braiding, and the spacing between copper helix is
0.3mm；
The iron wire for being wound with copper wire that S21 prepares step S11 lines up array, spacing 2.0mm；
S31 fills 1 μm of average grain diameter of chromium powder body in the gap of the step S21 array obtained；
Step S31 acquisition product is carried out compacting sintering processing by S32 under vacuum, and sintering temperature is 1200 DEG C, and pressurization is burnt
The pressure of knot is 2MPa.
The present invention also provides made from the above method containing cored copper-chromium contact material, containing cored copper chromium contact
When material is used for contact, the spontaneous regulation in contact surface magnetic field can drive zero energy gesture of vacuum arc quickly to move, reduce contact
Surface temperature and metallic vapour density.
Below with reference to embodiment, the present invention is further illustrated.
Lower combination refers to Fig. 1-3, is described in further details to the present invention, but these embodiments, must not be used for explanation pair
The limitation of the scope of the present invention.
Embodiment 1:
A kind of preparation method containing cored copper-chromium contact material, using chromium powder, copper wire and iron wire as raw material, chromium powder, copper
The weight ratio of silk and iron wire is 53:45: 2, be the described method comprises the following steps:
The copper wire of diameter 0.5mm is wrapped on the iron wire of 1.0mm by S11 using 3D braiding, the spacing between copper helix
For 0.5mm；
The iron wire for being wound with copper wire that S21 prepares step S11 lines up array, spacing 2.5mm；
S31 fills 20 μm of average grain diameter of chromium powder body in the gap of the step S21 array obtained；
Step S31 acquisition product is carried out compacting sintering processing by S32 under vacuum, and sintering temperature is 1100 DEG C.
For the present embodiment, the micro-structure individual unit for preparing as shown in Figs. 1-2 can be produced in disjunction short circuit current
Raw biggish magnetic field, the requirement of magnetic field strength needed for reaching high current disjunction success.
Embodiment 2:
A kind of preparation method containing cored copper-chromium contact material, using chromium powder, copper wire and iron wire as raw material, chromium powder, copper
The weight ratio of silk and iron wire is 50: 45: 5, be the described method comprises the following steps:
The copper wire of diameter 1mm is wrapped on the iron wire of 2.0mm by S11 using 3D braiding, and the spacing between copper helix is
0.3mm；
The iron wire for being wound with copper wire that S21 prepares step S11 lines up array, spacing 2.0mm；
S31 fills 100 μm of average grain diameter of chromium powder body in the gap of the step S21 array obtained；
Step S31 acquisition product is carried out compacting sintering processing by S32 under vacuum, and sintering temperature is 1200 DEG C,
Embodiment 3
With embodiment 2, difference is that the array in step S21 has certain tilt angle, the inclination of the present embodiment
Angle is 10 degree.
For the present embodiment 1-3, the micro-structure individual unit for preparing as shown in Figs. 1-3 can be in disjunction short circuit current
Biggish magnetic field is generated, the requirement of magnetic field strength needed for reaching high current disjunction success.It is described containing cored copper chromium contact material
When material is for contact, the spontaneous regulation in contact surface magnetic field can drive the quick movement and dispersion of vacuum arc, reduce contact table
The ablation in face.
Above content is only presently preferred embodiments of the present invention.It will be appreciated by those skilled in the art that the present invention is not limited to here
The specific embodiment, be able to carry out for a person skilled in the art it is various it is apparent variation, readjust and substitution and
Without departing from the scope of protection of the present invention.Therefore, although the present invention has been described in more detail through the above examples,
But the present invention is not limited to the above embodiments only, can also include more other without departing from the inventive concept
Equivalent embodiment, and the scope of the invention is determined by the scope of the appended claims.
Claims (8)
1. a kind of preparation method containing cored copper-chromium contact material, the described method comprises the following steps:
S1 by copper wire uniformly around outside pure iron silk, fix by both ends；
The iron wire for being wound with copper wire is lined up array by S2；
Chromium powder body is filled in the gap of S3 step S2, and carries out melting infiltration sintering.
2. the method as described in claim 1,
Preferably, the step S1 is specifically included:
S11 using chromium powder, copper wire and iron wire as raw material, by weight be (45-70): (20-50): (1-10) weigh respectively chromium powder,
Copper wire and iron wire are spare；Copper wire is wound on iron wire using 3D braiding；
The step S2 is specifically included:
The iron wire for being wound with copper wire that S21 prepares step S11 lines up array；
The step S3 is specifically included:
S31 fills chromium powder body in the gap of the step S21 array obtained；
Step S31 is obtained product and carries out compacting sintering processing by S32.
3. method according to claim 2, in step s 11, brass wire diameter are 0.1-5.0 millimeters, iron wire diameter is 0.1-
5.0mm, the spacing between copper helix are 0.1-5mm.
4. method according to claim 2, in step s 32, the sintering carry out under vacuum.
5. method according to claim 2, in the step s 21, spacing 0.5-5mm.
6. method according to claim 2, in step s 32, sintering temperature are 1000-1400 DEG C.
7. method according to claim 2, in step S31, the chromium powder body of 0.5-200 μm of average grain diameter of filling.
8. described containing cored containing cored copper-chromium contact material as made from any one of claim 1-7 the method
When copper-chromium contact material is used for contact, the spontaneous regulation in contact surface magnetic field can drive the quick movement and dispersion of vacuum arc, drop
The low ablation of contact surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811205800.1A CN109351977B (en) | 2018-10-18 | 2018-10-18 | Preparation method of iron core-containing copper-chromium contact material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811205800.1A CN109351977B (en) | 2018-10-18 | 2018-10-18 | Preparation method of iron core-containing copper-chromium contact material |
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| Publication Number | Publication Date |
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| CN109351977A true CN109351977A (en) | 2019-02-19 |
| CN109351977B CN109351977B (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811205800.1A Active CN109351977B (en) | 2018-10-18 | 2018-10-18 | Preparation method of iron core-containing copper-chromium contact material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113172235A (en) * | 2021-04-02 | 2021-07-27 | 西安交通大学 | Electrical contact preparation method based on multi-material metal synchronous 3D printing technology |
| CN114694984B (en) * | 2022-04-29 | 2024-01-19 | 西安交通大学 | Silver tin oxide intelligent contact with magnetic field self-regulating function |
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|---|---|---|---|---|
| US3191274A (en) * | 1961-02-20 | 1965-06-29 | Talon Inc | Method of making an electrical contact |
| DE2351226A1 (en) * | 1973-10-12 | 1975-04-17 | Rau Fa G | METALLIC MATERIAL WITH INCORPORATED ADDITIVES AND MANUFACTURING PROCESS FOR THESE |
| CN1050223A (en) * | 1990-11-03 | 1991-03-27 | 冶金工业部钢铁研究总院 | Material for cu-cr-fe vacuum contact finger |
| CN1404084A (en) * | 2001-09-05 | 2003-03-19 | 中国科学院金属研究所 | Spring touch finger for high-voltage switch and its manufacture |
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| CN1674180A (en) * | 2004-03-22 | 2005-09-28 | 株式会社东芝 | Composite contact, vacuum switch and method for manufacturing composite contact |
| CN103201059A (en) * | 2010-08-03 | 2013-07-10 | 普兰西电力技术股份公司 | Process for producing a cu-cr material by powder metallurgy |
| CN107604199A (en) * | 2017-08-30 | 2018-01-19 | 西安理工大学 | A kind of preparation method of Cu Cr Fe vacuum contact materials |
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2018
- 2018-10-18 CN CN201811205800.1A patent/CN109351977B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3191274A (en) * | 1961-02-20 | 1965-06-29 | Talon Inc | Method of making an electrical contact |
| DE2351226A1 (en) * | 1973-10-12 | 1975-04-17 | Rau Fa G | METALLIC MATERIAL WITH INCORPORATED ADDITIVES AND MANUFACTURING PROCESS FOR THESE |
| CN1050223A (en) * | 1990-11-03 | 1991-03-27 | 冶金工业部钢铁研究总院 | Material for cu-cr-fe vacuum contact finger |
| CN1404084A (en) * | 2001-09-05 | 2003-03-19 | 中国科学院金属研究所 | Spring touch finger for high-voltage switch and its manufacture |
| CN1424417A (en) * | 2001-12-10 | 2003-06-18 | 北京有色金属研究总院 | Alloy powders for preparing CuCr alloy probe material and preparation thereof |
| CN1674180A (en) * | 2004-03-22 | 2005-09-28 | 株式会社东芝 | Composite contact, vacuum switch and method for manufacturing composite contact |
| CN103201059A (en) * | 2010-08-03 | 2013-07-10 | 普兰西电力技术股份公司 | Process for producing a cu-cr material by powder metallurgy |
| CN107604199A (en) * | 2017-08-30 | 2018-01-19 | 西安理工大学 | A kind of preparation method of Cu Cr Fe vacuum contact materials |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113172235A (en) * | 2021-04-02 | 2021-07-27 | 西安交通大学 | Electrical contact preparation method based on multi-material metal synchronous 3D printing technology |
| CN114694984B (en) * | 2022-04-29 | 2024-01-19 | 西安交通大学 | Silver tin oxide intelligent contact with magnetic field self-regulating function |
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| Publication number | Publication date |
|---|---|
| CN109351977B (en) | 2020-03-31 |
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