CN105761956A - Contact material, vacuum arc-extinguishing chamber contact and manufacturing method thereof - Google Patents
Contact material, vacuum arc-extinguishing chamber contact and manufacturing method thereof Download PDFInfo
- Publication number
- CN105761956A CN105761956A CN201610164986.5A CN201610164986A CN105761956A CN 105761956 A CN105761956 A CN 105761956A CN 201610164986 A CN201610164986 A CN 201610164986A CN 105761956 A CN105761956 A CN 105761956A
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- CN
- China
- Prior art keywords
- contact
- extinguishing chamber
- vacuum arc
- contact material
- preparation
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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
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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
- C22C1/05—Mixtures of metal powder with non-metallic powder
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- 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
- 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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- 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
Abstract
The present invention discloses a contact material, a vacuum arc-extinguishing chamber contact and a manufacturing method thereof. The contact material comprises 0.1%-10% by mass of graphene, and is balanced with Cu and Cr; wherein the mass ratio of Cu and Cr is (50-75):(25-50). According to the contact material, 0.1%-10% by mass of graphene is added to CuCr alloy contact material, thus hardness and thermal conductivity of the contact material can be improved, and a chopping current value is reduced, thereby solving the problems of low hardness, poor thermal conductivity, and high chopping current value of the conventional CuCr contact material. The vacuum arc-extinguishing chamber contact is manufactured in the form of powder metallurgy, in comparison with the conventional CuCr alloy contact, the hardness of the vacuum arc-extinguishing chamber contact is raised by 5%-50%, the thermal conductivity of the vacuum arc-extinguishing chamber contact is raised by 10%-60%, and the chopping current value of the vacuum arc-extinguishing chamber contact is reduced by 10%-50%. The vacuum arc-extinguishing chamber contact has the advantages of high hardness, high thermal conductivity, and low chopping current value, and is suitable for popularization and application.
Description
Technical field
The invention belongs to vacuum interrupter Element Technology field, be specifically related to a kind of contact material, relate to a kind of vacuum arc-extinguishing chamber contact adopting this material and preparation method thereof simultaneously.
Background technology
Contact material is vacuum interrupter " heart ", and it affects the connecting-disconnecting function of vacuum interrupter, electric life and reliability.At present, the contact material dominated is CuCr alloy, and conventional has CuCr50 and CuCr25.CuCr contact material have the advantages that Cr has strong pumping property so that after CuCr contact arcing deposition Cr effectively absorbed the residual gas in arc-chutes, it is ensured that the vacuum in vacuum interrupter longtime running.At present, CuCr contact material commonly uses in vacuum circuit breaker.
The manufacturing process of CuCr alloy contact can be divided into two classes, and a class is traditional handicraft, is substantially summarized as two kinds, i.e. general powder metallurgic method (mixed powder sintering method) and infiltration method (infusion process)；The another kind of new technology being advantageous for improving contact material performance, such as sintering squeezing and pressing method, isostatic pressing method, ion implanting, electric arc melting, edm forming sintering process and alloy inner oxidation method.At present, four kinds of preparation technologies that CuCr alloy contact material is the most frequently used in the world are: mixed powder sintering, infiltration, vacuum casting and vacuum arc melting.
Why CuCr contact material can show comparatively good performance, and what lean on is the advantage being effectively compounded with Cu, Cr each constituent element, and both form equally distributed biphase pseudo-alloy.But, when existing CuCr alloy is as vacuum arc-extinguishing chamber contact materials'use, also tend to exist that hardness is low, poor thermal conductivity and the high problem of value of damming.
Affect contact material electrical property because have two broad aspect: one is the chemical composition of material, i.e. elementary composition and respective content；Two is preparation technology.In prior art, in order to improve the combination property of contact material further, it is possible to add other element in CuCr alloy, such as alloying elements such as Fe, Al, Te, Sb, Se；Or improvement preparation technology, makes chromium crystal grain substantially refine.But aforesaid way improves limited for the mechanical performances such as the wearability of CuCr alloy contact material, compressive resistance, heat conductivity, and the reduction of value that electricity is dammed is also inconspicuous.
Summary of the invention
It is an object of the invention to provide a kind of contact material, solve that the hardness that existing CuCr contact material exists is low, poor thermal conductivity and electricity dam the high problem of value.
Second purpose of the present invention is to provide a kind of vacuum arc-extinguishing chamber contact adopting above-mentioned contact material.
The preparation method that 3rd purpose of the present invention is to provide a kind of above-mentioned vacuum arc-extinguishing chamber contact.
In order to realize object above, the technical solution adopted in the present invention is:
A kind of contact material, is made up of the component of following mass percent: Graphene 0.1%～10%, and surplus is Cu, Cr；Wherein, the mass ratio of Cu and Cr is (50～75): (25～50).
Preferably, the mass ratio of Cu and Cr is 75:25,70:30,60:40,55:45 or 50:50.
A kind of vacuum arc-extinguishing chamber contact adopting above-mentioned contact material.
The preparation method of a kind of above-mentioned vacuum arc-extinguishing chamber contact, including the mode adopting powder metallurgy, press formula ratio mix Graphene powder, copper powder, chromium powder, after compressing in a mold, is sintered, to obtain final product under vacuum condition or protective atmosphere.
In above-mentioned preparation method, the particle diameter of described Graphene powder is 1～20 μm.The particle diameter of described copper powder is 10～70 μm；The particle diameter of described chromium powder is 10～70 μm.
Compressing pressure used is 100～500MPa.
The temperature of described sintering is 650～1000 DEG C.Due to the generation chromium carbide that can react under C and Cr high temperature more than 1000 DEG C, the temperature therefore sintered is 650～1000 DEG C.The time of described sintering is 0.5～2h.
The preferred nitrogen atmosphere of described protective atmosphere.
Owing to Graphene has high hardness, belong to hard phase, join the effect having dispersion-strengtherning in CuCr alloy；The thermal conductivity of Graphene is 13 times of copper, and therefore being added with of Graphene is beneficial to the thermal conductivity improving material.
The contact material of the present invention, adding mass content in CuCr alloy contact material is the Graphene of 0.1%～10%, improve the hardness of contact material, thermal conductivity, reduce value of damming, the problem that hardness is low, poor thermal conductivity and electricity the dam value that solves that existing CuCr contact material exists is high, applied range.
The preparation method adopting the vacuum arc-extinguishing chamber contact of this contact material, is the mode adopting powder metallurgy, by Graphene powder, copper powder, chromium powder mixing, after compressing in a mold, is sintered under vacuum condition or protective atmosphere；Gained vacuum arc-extinguishing chamber contact is relative to existing CuCr alloy contact, and hardness improves 5%～50%, and thermal conductivity improves 10%～60%, value of damming reduction by 10%～50%；Gained vacuum arc-extinguishing chamber contact has the feature of high rigidity, high heat conductance and low value of damming, and is suitable for promoting the use of.This preparation method technique is simple, easy to operate, is suitable for large-scale industrial production.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is further illustrated.
In detailed description of the invention, the particle size range of Graphene powder used is 1～20 μm, and the particle size range of copper powder is 10～70 μm, and the particle size range of chromium powder is 10～70 μm.
Embodiment 1
The contact material of the present embodiment, is made up of the component of following mass percent: Graphene 0.1%, and surplus is Cu, Cr；Wherein, the mass ratio of Cu and Cr is 50:50.
Adopt the vacuum arc-extinguishing chamber contact of above-mentioned contact material, preparation method is: adopt the mode of powder metallurgy, and Graphene powder, copper powder, chromium powder press formula ratio and mixed, in a mold (300MPa) compressing after, under vacuum, 650 DEG C of conditions, sinter 2h, to obtain final product.
After testing, relative to existing CuCr50 alloy contact, the present embodiment gained vacuum arc-extinguishing chamber contact, hardness improves about 5%, and thermal conductivity improves about 10%, and value of damming reduces about 10%.
Embodiment 2
The contact material of the present embodiment, is made up of the component of following mass percent: Graphene 5%, and surplus is Cu, Cr；Wherein, the mass ratio of Cu and Cr is 50:50.
Adopt the vacuum arc-extinguishing chamber contact of above-mentioned contact material, preparation method is: adopt the mode of powder metallurgy, and Graphene powder, copper powder, chromium powder press formula ratio and mixed, in a mold (200MPa) compressing after, under nitrogen atmosphere, 850 DEG C of conditions, sinter 1.5h, to obtain final product.
After testing, relative to existing CuCr50 alloy contact, the present embodiment gained vacuum arc-extinguishing chamber contact, hardness improves about 30%, and thermal conductivity improves about 40%, and value of damming reduces about 30%.
Embodiment 3
The contact material of the present embodiment, is made up of the component of following mass percent: Graphene 10%, and surplus is Cu, Cr；Wherein, the mass ratio of Cu and Cr is 50:50.
Adopt the vacuum arc-extinguishing chamber contact of above-mentioned contact material, preparation method is: adopt the mode of powder metallurgy, and Graphene powder, copper powder, chromium powder press formula ratio and mixed, in a mold (400MPa) compressing after, under vacuum, 1000 DEG C of conditions, sinter 0.5h, to obtain final product.
After testing, relative to existing CuCr50 alloy contact, the present embodiment gained vacuum arc-extinguishing chamber contact, hardness improves about 50%, and thermal conductivity improves about 60%, and value of damming reduces about 50%.
In the contact material of embodiment 4-12, the content of each component and the preparation parameter of vacuum arc-extinguishing chamber contact are as shown in table 1, and all the other are with embodiment 1.
The preparation parameter of the content of each component and vacuum arc-extinguishing chamber contact in the contact material of table 1 embodiment 4-12
After testing, relative to the CuCr alloy contact of existing correspondence, embodiment 4-12 gained vacuum arc-extinguishing chamber contact, hardness improves about 5%-50%, and thermal conductivity improves about 10%-60%, and value of damming reduces about 10%-50%.It is shown that gained vacuum arc-extinguishing chamber contact of the present invention has the feature of high rigidity, high heat conductance and low value of damming, it is suitable for promoting the use of.
Claims (9)
1. a contact material, it is characterised in that: being made up of the component of following mass percent: Graphene 0.1%～10%, surplus is Cu, Cr；Wherein, the mass ratio of Cu and Cr is (50～75): (25～50).
2. contact material according to claim 1, it is characterised in that: the mass ratio of Cu and Cr is 75:25,70:30,60:40,55:45 or 50:50.
3. the vacuum arc-extinguishing chamber contact adopting contact material as claimed in claim 1.
4. the preparation method of a vacuum arc-extinguishing chamber contact as claimed in claim 3; it is characterized in that: include adopting the mode of powder metallurgy, Graphene powder, copper powder, chromium powder press formula ratio and mixed, after compressing in a mold; it is sintered under vacuum condition or protective atmosphere, to obtain final product.
5. the preparation method of vacuum arc-extinguishing chamber contact according to claim 4, it is characterised in that: the particle diameter of described Graphene powder is 1～20 μm.
6. the preparation method of vacuum arc-extinguishing chamber contact according to claim 4, it is characterised in that: the particle diameter of described copper powder is 10～70 μm；The particle diameter of described chromium powder is 10～70 μm.
7. the preparation method of vacuum arc-extinguishing chamber contact according to claim 4, it is characterised in that: compressing pressure used is 100～500MPa.
8. the preparation method of vacuum arc-extinguishing chamber contact according to claim 4, it is characterised in that: the temperature of described sintering is 650～1000 DEG C.
9. the preparation method of the vacuum arc-extinguishing chamber contact according to claim 4 or 8, it is characterised in that: the time of described sintering is 0.5～2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610164986.5A CN105761956A (en) | 2016-03-21 | 2016-03-21 | Contact material, vacuum arc-extinguishing chamber contact and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610164986.5A CN105761956A (en) | 2016-03-21 | 2016-03-21 | Contact material, vacuum arc-extinguishing chamber contact and manufacturing method thereof |
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| CN105761956A true CN105761956A (en) | 2016-07-13 |
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| CN201610164986.5A Pending CN105761956A (en) | 2016-03-21 | 2016-03-21 | Contact material, vacuum arc-extinguishing chamber contact and manufacturing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108441670A (en) * | 2018-03-19 | 2018-08-24 | 陕西斯瑞新材料股份有限公司 | The method for preparing 50 contact material of copper chromium using vacuum consumable electrode arc furnace |
| CN110036454A (en) * | 2016-12-13 | 2019-07-19 | 伊顿智能动力有限公司 | Improvement electric contact alloy for vacuum contactor |
| CN111926205A (en) * | 2020-08-25 | 2020-11-13 | 宝鸡文理学院 | Preparation method of Cu-C-Ag alloy electrical contact material |
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| JPH10255603A (en) * | 1997-03-07 | 1998-09-25 | Shibafu Eng Kk | Contact material for vacuum valve |
| CN105063403A (en) * | 2015-06-25 | 2015-11-18 | 中国航空工业集团公司北京航空材料研究院 | Preparation method of copper matrix graphene alloy |
| CN105185608A (en) * | 2015-10-16 | 2015-12-23 | 上海和伍复合材料有限公司 | Copper-coated-with-silver graphene composite rivet contact and preparation method therefor |
| CN105385884A (en) * | 2015-12-24 | 2016-03-09 | 济南大学 | Electrical contact material and preparation method thereof |
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2016
- 2016-03-21 CN CN201610164986.5A patent/CN105761956A/en active Pending
Patent Citations (4)
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| JPH10255603A (en) * | 1997-03-07 | 1998-09-25 | Shibafu Eng Kk | Contact material for vacuum valve |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110036454A (en) * | 2016-12-13 | 2019-07-19 | 伊顿智能动力有限公司 | Improvement electric contact alloy for vacuum contactor |
| US10468205B2 (en) * | 2016-12-13 | 2019-11-05 | Eaton Intelligent Power Limited | Electrical contact alloy for vacuum contactors |
| US10804044B2 (en) | 2016-12-13 | 2020-10-13 | Eaton Intelligent Power Limited | Electrical contact alloy for vacuum contactors |
| EP3555898B1 (en) * | 2016-12-13 | 2023-01-25 | Eaton Intelligent Power Limited | Improved electrical contact alloy for vacuum contactors |
| CN108441670A (en) * | 2018-03-19 | 2018-08-24 | 陕西斯瑞新材料股份有限公司 | The method for preparing 50 contact material of copper chromium using vacuum consumable electrode arc furnace |
| CN108441670B (en) * | 2018-03-19 | 2020-06-16 | 陕西斯瑞新材料股份有限公司 | Method for preparing copper-chromium 50 electric contact material by using vacuum consumable electrode arc furnace |
| CN111926205A (en) * | 2020-08-25 | 2020-11-13 | 宝鸡文理学院 | Preparation method of Cu-C-Ag alloy electrical contact material |
| CN111926205B (en) * | 2020-08-25 | 2021-10-19 | 宝鸡文理学院 | Preparation method of Cu-C-Ag alloy electrical contact material |
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Application publication date: 20160713 |
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