CN105132726B - A kind of copper-chromium contact material suitable for contactor and preparation method thereof - Google Patents
A kind of copper-chromium contact material suitable for contactor and preparation method thereof Download PDFInfo
- Publication number
- CN105132726B CN105132726B CN201510481480.2A CN201510481480A CN105132726B CN 105132726 B CN105132726 B CN 105132726B CN 201510481480 A CN201510481480 A CN 201510481480A CN 105132726 B CN105132726 B CN 105132726B
- Authority
- CN
- China
- Prior art keywords
- powder
- copper
- temperature
- time
- contactor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Contacts (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to a kind of copper-chromium contact material suitable for contactor and preparation method thereof.The copper-chromium contact material be by following percentage by weight：40 50%, Cu surplus of Cr content constitutes.Its preparation method includes that raw material select to mix powder isostatic cool pressing jacket extruding Ageing Treatment.The present invention develops a kind of threadiness directed tissue copper chromium material, will have high anti-electricity ablation property with good electric conductivity simultaneously, also, meet and improve contactor service life.The present invention instead of existing AgW, CuW contact material in contactor, reduces cost, save noble metal, while improve contactor service life.
Description
Technical field
The present invention relates to a kind of copper-chromium contact material suitable for contactor and preparation method thereof, belongs to metal-based compound material
Material field.
Background technology
Contact plays a part of to connect, carries and breaking current, is the heart component of contactor, and its performance is to a great extent
Determine performance and its reliability of operation of contactor.Therefore contactor has the requirement of harshness to contact, it is desirable to have：①
Good arc resistant scaling loss ability, 2. high fusion welding resisting ability, the mechanical life that 3. grows, 4. good electrical and thermal conductivity performance.
At present, conventional probe of contactor material is silver-colored tungsten or copper tungsten, but obtained contact tungsten particle in prior art
Skewness, is easily layered, and consistency is low, it is impossible to meet the use requirement of contactor.Silver-colored tungsten or copper tungsten contact are generally using molten
Need to add minor metallic element when oozing method to manufacture, but manufacturing using infiltration method technique, such as nickel, cobalt, iron, improve metal pair
The wettability of tungsten, to obtain the contact of densification.As the metallic element for adding is micro, they are difficult to be uniformly dispersed and can not
Effective on tungsten particle surface, metal is caused effectively to improve the wettability of tungsten, the metal liquid of infiltration is not
Be enough to full of pressed compact, thus result in that contact consistency is not ideal enough, metallographic structure is not uniform enough, contact arc resistant scaling loss ability
Low.
Content of the invention
The technical problem to be solved is for drawbacks described above, provides a kind of copper chromium contact suitable for contactor
Material and preparation method thereof.It is a kind of threadiness directed tissue copper chromium material, simultaneously, also has with good electric conductivity
High anti-electricity ablation property, meets and improves contactor service life.The present invention instead of existing AgW, CuW in contactor and touch
Head material, reduces cost, noble metal is saved, while improve contactor service life.
The technical scheme that the present invention solves its technical problem employing is as follows：A kind of copper chromium contact material suitable for contactor
Material, it is become to be grouped into by following percentage by weight：Cr is 40-50%, balance of Cu；It is micro- that its raw material is respectively 200-300
The Cr powder of rice and less than 300 microns of Cu powder, the copper-chromium contact material is the copper chromium material of fibrous directed tissue.
Additionally, the preparation method of the copper-chromium contact material suitable for contactor, comprises the following steps：
(1) raw material are selected
The Cu powder of the Cr powder from 200-300 micron and less than 300 microns；The Cr powder and Cu powder are by following step
Suddenly make：Respectively Cr block and Cu rod being put in stainless steel jar mill, process being vacuumized to ball grinder, vacuum is less than 6Pa,
Be then charged with inert protective gas, vacuumize-gas replenishment process in triplicate, with emptying ball grinder air that may be present, prevent
Aoxidize；The closed ball milling tank for vacuumizing is put into ball mill, carries out ball milling；Ball milling takes out ball grinder after terminating, using pin
In managing toward ball grinder, injection 80～90ml absolute ethyl alcohol during this, keeps the circulation of inert gas as wet grinding media, in order to avoid
Inert protective atmosphere is destroyed, then carries out wet-milling；After wet-milling terminates, powder is taken out, drying box drying is put into, is finally respectively obtained
Cr powder and Cu powder；
(2) powder is mixed
By Cu powder: Cr powder=6: 4～5: 5 weight proportion, and by Cu powder and the mixed powder of Cr powder: copper ball=1: 1 weight
Amount proportioning carries out ball milling and mixes powder 3-10 hour；
(3) isostatic cool pressing
It is bar that mixed powder after will be mixed loads rubber sleeve isostatic cool pressing, and pressure is 150-300Mpa, and the dwell time is
3-20 minute；
(4) jacket
The bar pressed in step (3) is loaded copper sheathing, copper sheathing thickness is 1-5mm, is evacuated to 1pa-10-2Pa is carried out very
Empty sealing；
(5) extrude
Bar after jacket is sealed is heated to 50-500 DEG C, is incubated -120 minutes 30 minutes, is carried out using hydraulic press cold
Extruding or Warm Extrusion, extrusion deformation degree are 20%-95%, and hydraulic press tonnage is 100-1000T；
(6) Ageing Treatment
Bar after extruding carries out Ageing Treatment, and aging temp is 200-500 DEG C, is incubated 1-4 hour；After Ageing Treatment
Bar is the contact material suitable for contactor.
Preferably, in step (1), Ball-milling Time is 5h～20h, and rotating speed is 200～300rpm；The wet-milling time be 5h～
15h, rotating speed are 200～400rpm；Baking temperature is 100～150 DEG C, and the time is 10～20h.
In any of the above-described scheme preferably, carried out using the cold isostatic press with aluminium alloy clamping plate in step (3) cold
Isostatic pressed, temperature control are 20 DEG C.
In any of the above-described scheme preferably, when the Ageing Treatment in step (6) includes low-temperature space preageing, high-temperature region
Effect and low-temperature space timeliness again.
In any of the above-described scheme preferably, the low-temperature space preageing be by the bar after extruding by room temperature extremely
200 DEG C, held for some time at such a temperature；The high temperature region aging is that the bar after extruding is warming up to 400 DEG C, in the temperature
The lower held for some time of degree, subsequent continuous warming to 500 DEG C, held for some time at such a temperature；Low-temperature space timeliness again
It is that the bar after extruding is cooled to room temperature by 500 DEG C, then will be by room temperature to 300 DEG C, one timing of insulation at such a temperature
Between.
In any of the above-described scheme preferably, the held for some time is all identical every time.
Beneficial effects of the present invention：
1. reduce the consumption of noble metal, economize on resources；
2. using chromium replace W Ag, production cost greatly reduces；
3. compare electric life to be brought up to 50W time by original 30W time, contactor service life is improved；
4. compared with prior art, evenly, consistency and hardness are higher for the metallographic structure of gained contact material for the present invention,
Arc resistant scaling loss ability is also higher, and resistivity is low.
5. the whole manufacture process of the inventive method does not use toxic chemical substance and does not produce any waste water and other are useless
Gurry, and technique is more simple.
Brief Description Of Drawings
Fig. 1 is the metallographic structure figure of the CuCr40 contact material suitable for contactor prepared in accordance with the method for the present invention；
Fig. 2 is the metallographic structure figure of the CuCr50 contact material suitable for contactor prepared in accordance with the method for the present invention.
Specific embodiment
The present invention is described further below in conjunction with the drawings and specific embodiments.
Embodiment 1
A kind of CuCr40 contact material suitable for contactor, it is become to be grouped into by following percentage by weight：Cr is
40% or so, balance of Cu；Its raw material is respectively the Cr powder of 200-300 micron and less than 300 microns of Cu powder, the copper chromium
Contact material is the copper chromium material of fibrous directed tissue.
The preparation method of the described CuCr40 contact material suitable for contactor, comprises the following steps：
(1) raw material are selected
The Cu powder of the Cr powder from 200-300 micron and less than 300 microns；The Cr powder and Cu powder are by following step
Suddenly make：Respectively Cr block and Cu rod being put in stainless steel jar mill, process being vacuumized to ball grinder, vacuum is less than 6Pa,
Be then charged with inert protective gas, vacuumize-gas replenishment process in triplicate, with emptying ball grinder air that may be present, prevent
Aoxidize；The closed ball milling tank for vacuumizing is put into ball mill, carries out ball milling；Ball milling takes out ball grinder after terminating, using pin
In managing toward ball grinder, injection 80～90ml absolute ethyl alcohol during this, keeps the circulation of inert gas as wet grinding media, in order to avoid
Inert protective atmosphere is destroyed, then carries out wet-milling；After wet-milling terminates, powder is taken out, drying box drying is put into, is finally respectively obtained
Cr powder and Cu powder；
(2) powder is mixed
By Cu powder: Cr powder is about 6: 4 weight proportion, and by Cu powder and the mixed powder of Cr powder: copper ball=1: 1 weight is joined
Powder 3-10 hour is mixed than carrying out ball milling；
(3) isostatic cool pressing
It is bar that mixed powder after will be mixed loads rubber sleeve isostatic cool pressing, and pressure is 150-300Mpa, and the dwell time is
3-20 minute；
(4) jacket
The bar pressed in step (3) is loaded copper sheathing, copper sheathing thickness is 1-5mm, is evacuated to 1pa-10-2Pa is carried out very
Empty sealing；
(5) extrude
Bar after jacket is sealed is heated to 50-500 DEG C, is incubated -120 minutes 30 minutes, is carried out using hydraulic press cold
Extruding or Warm Extrusion, extrusion deformation degree are 20%-95%, and hydraulic press tonnage is 100-1000T；
(6) Ageing Treatment
Bar after extruding carries out Ageing Treatment, and aging temp is 200-500 DEG C, is incubated 1-4 hour；After Ageing Treatment
Bar is the contact material suitable for contactor.
In step (1), Ball-milling Time is 5h～20h, and rotating speed is 200～300rpm；The wet-milling time is 5h～15h, and rotating speed is
200～400rpm；Baking temperature is 100～150 DEG C, and the time is 10～20h.
Step carries out isostatic cool pressing using the cold isostatic press with aluminium alloy clamping plate in (3), and temperature control is 20 DEG C.
Ageing Treatment in step (6) includes low-temperature space preageing, high temperature region aging and low-temperature space timeliness again.
The low-temperature space preageing is to 200 DEG C by the bar after extruding by room temperature, is incubated at such a temperature certain
Time；The high temperature region aging is that the bar after extruding is warming up to 400 DEG C, and held for some time, subsequently connects at such a temperature
Continue and 500 DEG C are warming up to, at such a temperature held for some time；The low-temperature space again timeliness be by the bar after extruding by 500 DEG C
It is cooled to room temperature, then will be by room temperature to 300 DEG C, held for some time at such a temperature.
The held for some time is all identical every time.
Embodiment 2
A kind of CuCr50 contact material suitable for contactor, it is become to be grouped into by following percentage by weight：Cr is
50% or so, balance of Cu；Its raw material is respectively the Cr powder of 200-300 micron and less than 300 microns of Cu powder, the copper chromium
Contact material is the copper chromium material of fibrous directed tissue.
The preparation method of the described CuCr50 contact material suitable for contactor, comprises the following steps：
(1) raw material are selected
The Cu powder of the Cr powder from 200-300 micron and less than 300 microns；The Cr powder and Cu powder are by following step
Suddenly make：Respectively Cr block and Cu rod being put in stainless steel jar mill, process being vacuumized to ball grinder, vacuum is less than 6Pa,
Be then charged with inert protective gas, vacuumize-gas replenishment process in triplicate, with emptying ball grinder air that may be present, prevent
Aoxidize；The closed ball milling tank for vacuumizing is put into ball mill, carries out ball milling；Ball milling takes out ball grinder after terminating, using pin
In managing toward ball grinder, injection 80～90ml absolute ethyl alcohol during this, keeps the circulation of inert gas as wet grinding media, in order to avoid
Inert protective atmosphere is destroyed, then carries out wet-milling；After wet-milling terminates, powder is taken out, drying box drying is put into, is finally respectively obtained
Cr powder and Cu powder；
(2) powder is mixed
By Cu powder: Cr powder is about 5: 5 weight proportion, and by Cu powder and the mixed powder of Cr powder: copper ball=1: 1 weight is joined
Powder 3-10 hour is mixed than carrying out ball milling；
(3) isostatic cool pressing
It is bar that mixed powder after will be mixed loads rubber sleeve isostatic cool pressing, and pressure is 150-300Mpa, and the dwell time is
3-20 minute；
(4) jacket
The bar pressed in step (3) is loaded copper sheathing, copper sheathing thickness is 1-5mm, is evacuated to 1pa-10-2Pa is carried out very
Empty sealing；
(5) extrude
Bar after jacket is sealed is heated to 50-500 DEG C, is incubated -120 minutes 30 minutes, is carried out using hydraulic press cold
Extruding or Warm Extrusion, extrusion deformation degree are 20%-95%, and hydraulic press tonnage is 100-1000T；
(6) Ageing Treatment
Bar after extruding carries out Ageing Treatment, and aging temp is 200-500 DEG C, is incubated 1-4 hour；After Ageing Treatment
Bar is the contact material suitable for contactor.
In step (1), Ball-milling Time is 5h～20h, and rotating speed is 200～300rpm；The wet-milling time is 5h～15h, and rotating speed is
200～400rpm；Baking temperature is 100～150 DEG C, and the time is 10～20h.
Step carries out isostatic cool pressing using the cold isostatic press with aluminium alloy clamping plate in (3), and temperature control is 20 DEG C.
Ageing Treatment in step (6) includes low-temperature space preageing, high temperature region aging and low-temperature space timeliness again.
The low-temperature space preageing is to 200 DEG C by the bar after extruding by room temperature, is incubated at such a temperature certain
Time；The high temperature region aging is that the bar after extruding is warming up to 400 DEG C, and held for some time, subsequently connects at such a temperature
Continue and 500 DEG C are warming up to, at such a temperature held for some time；The low-temperature space again timeliness be by the bar after extruding by 500 DEG C
It is cooled to room temperature, then will be by room temperature to 300 DEG C, held for some time at such a temperature.
The held for some time is all identical every time.
Through experimental test, the physicochemical property such as table of respective obtained CuCr40 and CuCr50 contact material in above-described embodiment
Shown in 1.
Table 1
The whole manufacture process of the inventive method does not use toxic chemical substance and does not produce any waste water and other are discarded
Thing, and technique is more simple, and reduce the consumption of noble metal, economize on resources.Obtained by this method suitable for contactor
Copper-chromium contact material using chromium replace W Ag, production cost greatly reduces；Electric life is compared by 30W time original raising
To 50W time, contactor service life is improved；The present invention compared with prior art, the metallographic structure of gained contact material evenly,
Consistency and hardness higher, arc resistant scaling loss ability is also higher, and resistivity is low.
The above, is only presently preferred embodiments of the present invention, not does any pro forma restriction to the present invention, every according to
According to any simple modification that above example is made in the technical spirit of the present invention, equivalent variations, the guarantor of the present invention is each fallen within
Within the scope of shield.
Claims (6)
1. a kind of preparation method of the copper-chromium contact material suitable for contactor, it is characterised in that：
Suitable for the copper-chromium contact material of contactor, it is become to be grouped into by following percentage by weight：Cr is 40-50%, surplus
For Cu；Its raw material is respectively the Cr powder of 200-300 micron and less than 300 microns of Cu powder, and the copper-chromium contact material is fine
The copper chromium material of dimension shape directed tissue；
Preparation method is comprised the following steps：
(1) raw material are selected
The Cu powder of the Cr powder from 200-300 micron and less than 300 microns；The Cr powder and Cu powder pass through following steps system
Become：Respectively Cr block and Cu rod being put in stainless steel jar mill, process being vacuumized to ball grinder, vacuum is less than 6Pa, then
Be filled with inert protective gas, vacuumize-gas replenishment process in triplicate, with emptying ball grinder air that may be present, prevent
Oxidation；The closed ball milling tank for vacuumizing is put into ball mill, carries out ball milling；Ball milling takes out ball grinder after terminating, past using needle tubing
In ball grinder, injection 80～90ml absolute ethyl alcohol during this, keeps the circulation of inert gas as wet grinding media, in order to avoid destroy
Inert protective atmosphere, then carries out wet-milling；After wet-milling terminates, powder is taken out, drying box drying is put into, finally respectively obtains Cr powder
And Cu powder；
(2) powder is mixed
By Cu powder: Cr powder=6: 4～5: 5 weight proportion, and by Cu powder and the mixed powder of Cr powder: copper ball=1: 1 weight is joined
Powder 3-10 hour is mixed than carrying out ball milling；
(3) isostatic cool pressing
It is bar that mixed powder after will be mixed loads rubber sleeve isostatic cool pressing, and pressure is 150-300MPa, and the dwell time is 3-20
Minute；
(4) jacket
The bar pressed in step (3) is loaded copper sheathing, copper sheathing thickness is 1-5mm, is evacuated to 1Pa-10-2It is close that Pa carries out vacuum
Envelope；
(5) extrude
Bar after jacket is sealed is heated to 50-500 DEG C, is incubated -120 minutes 30 minutes；Cold extrusion is carried out using hydraulic press
Or Warm Extrusion, extrusion deformation degree is 20%-95%, and hydraulic press tonnage is 100-1000T；
(6) Ageing Treatment
Bar after extruding carries out Ageing Treatment, and aging temp is 200-500 DEG C, is incubated 1-4 hour；Bar after Ageing Treatment
As it is applied to the contact material of contactor.
2. preparation method according to claim 1, it is characterised in that Ball-milling Time is 5h～20h in step (1), rotating speed is
200～300rpm；The wet-milling time is 5h～15h, and rotating speed is 200～400rpm；Baking temperature is 100～150 DEG C, and the time is 10
～20h.
3. preparation method according to claim 1 and 2, it is characterised in that using with the cold of aluminium alloy clamping plate in step (3)
Isostatic pressing machine carries out isostatic cool pressing, and temperature control is 20 DEG C.
4. preparation method according to claim 3, it is characterised in that when the Ageing Treatment in step (6) includes that low-temperature space is pre-
Effect, high temperature region aging and low-temperature space timeliness again.
5. preparation method according to claim 4, it is characterised in that the low-temperature space preageing be by the bar after extruding
By room temperature to 200 DEG C, held for some time at such a temperature；The high temperature region aging is to be warming up to the bar after extruding
400 DEG C, held for some time at such a temperature, subsequent continuous warming to 500 DEG C, held for some time at such a temperature；Described
Timeliness is that the bar after extruding is cooled to room temperature by 500 DEG C to low-temperature space again, then will be by room temperature to 300 DEG C, in the temperature
Lower held for some time.
6. preparation method according to claim 5, it is characterised in that the held for some time is all identical every time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510481480.2A CN105132726B (en) | 2015-07-31 | 2015-07-31 | A kind of copper-chromium contact material suitable for contactor and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510481480.2A CN105132726B (en) | 2015-07-31 | 2015-07-31 | A kind of copper-chromium contact material suitable for contactor and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105132726A CN105132726A (en) | 2015-12-09 |
| CN105132726B true CN105132726B (en) | 2017-03-08 |
Family
ID=54718290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510481480.2A Active CN105132726B (en) | 2015-07-31 | 2015-07-31 | A kind of copper-chromium contact material suitable for contactor and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105132726B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537526A (en) * | 2015-12-23 | 2016-05-04 | 哈尔滨福庭创富机械制造有限公司 | Forming method of flame-retarding insulating riser |
| CN105397279B (en) * | 2015-12-29 | 2018-01-05 | 陕西斯瑞新材料股份有限公司 | A kind of welding method of copper chromium on-load switch component |
| CN106086566B (en) * | 2016-06-20 | 2018-02-27 | 中国科学院兰州化学物理研究所 | A kind of chromium base high temperature wear resistant alloy and preparation method thereof |
| CN106735207B (en) * | 2016-12-13 | 2018-06-15 | 合肥工业大学 | A kind of preparation method of high-compactness Cu/CuCr gradient composites |
| DE102018109389A1 (en) * | 2018-04-19 | 2019-10-24 | Tdk Electronics Ag | switching device |
| CN109355524A (en) * | 2018-09-12 | 2019-02-19 | 河南长征电气有限公司 | A kind of copper-chromium contact material and preparation method thereof for vacuum circuit breaker |
| CN109261961B (en) * | 2018-10-18 | 2020-06-09 | 西安交通大学 | A preparation method for preparing copper-based electrical contact material based on 3D printing technology |
| CN110216282B (en) * | 2019-05-30 | 2024-03-26 | 上海新池能源科技有限公司 | Preparation method of copper-based alloy contact |
| CN110468300A (en) * | 2019-07-29 | 2019-11-19 | 西安斯瑞先进铜合金科技有限公司 | A kind of preparation method of high-performance CuCr electrical contact |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0651892B2 (en) * | 1984-02-23 | 1994-07-06 | ドドウコ・コマンデイ−トゲゼルシヤフト・ドクトル・オイゲン・デユルベヒテル | Manufacturing method of copper / chromium solid solution electrical contact piece for vacuum sealed switch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2695902B2 (en) * | 1989-02-28 | 1998-01-14 | 株式会社東芝 | Contact for vacuum valve |
-
2015
- 2015-07-31 CN CN201510481480.2A patent/CN105132726B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0651892B2 (en) * | 1984-02-23 | 1994-07-06 | ドドウコ・コマンデイ−トゲゼルシヤフト・ドクトル・オイゲン・デユルベヒテル | Manufacturing method of copper / chromium solid solution electrical contact piece for vacuum sealed switch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105132726A (en) | 2015-12-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105132726B (en) | A kind of copper-chromium contact material suitable for contactor and preparation method thereof | |
| CN101121974B (en) | High-strength high-conduction strengthened dispersion copper alloy and preparation method thereof | |
| CN105220004B (en) | A kind of copper-based electric contact composite material and preparation method thereof | |
| CN103352136B (en) | Copper-base contact material and manufacture craft | |
| CN106057526A (en) | Laminated silver-copper-brazing-filler-metal three-composite electrical contact material manufactured by coating and sleeving method and manufacturing method thereof | |
| CN105018768B (en) | High-performance copper chromium contactor material and preparing method thereof | |
| CN106735207B (en) | A kind of preparation method of high-compactness Cu/CuCr gradient composites | |
| CN108149059B (en) | A kind of TiC enhances the preparation method of copper-based electric contact composite material | |
| CN106756174B (en) | A kind of densification process of high-quality chromiumcopper | |
| CN102166650A (en) | Method for manufacturing gradient copper-wolfram/copper-chromium zirconium bronze integrated contact | |
| CN106623947B (en) | A kind of copper tungsten contact and preparation method thereof | |
| CN107498047A (en) | A kind of tungsten-copper composite material and preparation method thereof | |
| CN103305718B (en) | A kind of high-speed pressing and forming prepares Al 2o 3the method of dispersion strengthening copper alloy | |
| CN103996426B (en) | Silver-colored nickel composite electric contact material of a kind of nickel net distribution and preparation method thereof | |
| CN101418393B (en) | A New Method for Preparation of AgCuV Alloy Material | |
| CN106191511A (en) | The manufacture method of copper-chromium contact material | |
| CN103586470A (en) | Method for preparing silver metallic oxide graphite composite electrical contact material and product of silver metallic oxide graphite composite electrical contact material | |
| CN100562956C (en) | Method for manufacturing high temperature resistant silver oxide contact material | |
| CN1323179C (en) | High-strength and high-conductivity copper-based alloy material and preparation method thereof | |
| CN102330008B (en) | Preparation method for silver zinc oxide electrical contact | |
| CN111118332A (en) | Dynamic internal oxidation method for silver-based metal oxide electrical contact material | |
| CN102328086B (en) | Method for preparing silver tin oxide electrical contact | |
| CN107695358A (en) | A kind of preparation method of welding electrode | |
| CN102319901B (en) | Preparation method for silver cadmium oxide electrical contact | |
| CN103981418B (en) | TiC/TiB 2/ Al/Cu electrical contact material and its production and use |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 710077 Shaanxi Province, Xi'an Yanta District fish of the village fish bucket Road No. 273 Applicant after: SHAANXI SIRUI ADVANCED MATERIALS CO., LTD. Address before: 710077 Shaanxi Province, Xi'an Yanta District fish of the village fish bucket Road No. 273 Applicant before: Shaanxi Sirui Industries Co., Ltd. |
|
| COR | Change of bibliographic data | ||
| CB02 | Change of applicant information |
Address after: 710077 high tech Zone, Shaanxi, Xi'an Zhang Road No. 87, No. 12 Applicant after: SHAANXI SIRUI ADVANCED MATERIALS CO., LTD. Address before: 710077 Shaanxi Province, Xi'an Yanta District fish of the village fish bucket Road No. 273 Applicant before: SHAANXI SIRUI ADVANCED MATERIALS CO., LTD. |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |