CN102737863A - Silver nickel graphite composite contact terminal material and processing method thereof - Google Patents
Silver nickel graphite composite contact terminal material and processing method thereof Download PDFInfo
- Publication number
- CN102737863A CN102737863A CN2012102262052A CN201210226205A CN102737863A CN 102737863 A CN102737863 A CN 102737863A CN 2012102262052 A CN2012102262052 A CN 2012102262052A CN 201210226205 A CN201210226205 A CN 201210226205A CN 102737863 A CN102737863 A CN 102737863A
- Authority
- CN
- China
- Prior art keywords
- powder
- silver
- nickel
- graphite
- hours
- 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.)
- Granted
Links
Abstract
The invention discloses a processing method of a silver nickel graphite composite contact terminal material, and the processing method is characterized by comprising the steps of preparing silver powder, nickel powder and graphite powder contained by the silver nickel graphite composite contact terminal material, respectively preparing the silver powder and the nickel powder into nickel nitrate solution and silver nitrate solution, placing the nickel nitrate solution and the silver nitrate solution into a reactor vessel, injecting sodium hydroxide (NaOH) solution under the blending situation, precipitating silver oxide (Ag2O) plus nickelous hydroxide (Ni(OH)2) co-precipitated powder, after the co-precipitated powder is washed, dried and reduced, graphite powder is placed in to the co-precipitated powder, and finally the silver nickel graphite composite contact terminal material is obtained through steps of wet ball milling, vacuum drying, annealing, primary press forming, sintering, re-pressing, annealing, re-pressing and surface treatment. The distribution of nickel and graphite particles in a silver substrate can be improved by utilizing chemical co-precipitation process and wet ball milling process, the physical combination strength of wet materials can be improved, and the mechanical performance, the physical performance and electric performance of the material can be improved. The metallographic structure of the material is uniform and fine, the produced contact terminal material has large density, the conductivity is greatly optimized, and the electric arc corrosion resistance can be improved.
Description
Technical field
The present invention relates to a kind of manufacturing technique method that is used to make the silver-colored nickel graphite contact material of the electrical contact that appliance switches such as various breaker of plastic casing, frame-type universal circuit breaker use.
Background technology
In the low-voltage electrical apparatus electrical contact material, silver-colored nickel graphite contact material is mainly used on all kinds of breaker of plastic casing, the frame-type universal circuit breaker.This is because this material has good resistance fusion welding and conductivity, low and stable contact resistance.The effect of graphite is to stop the bonding and the melting welding of contact, and does not form any insulant and make contact resistance become big.But graphite has the inclination and the aerial poor heat stability of stable arc, because existing silver-colored nickel graphite contact material is not paid attention to the technology of content of graphite and processing in the course of processing, thereby arc resistant corrosive power difference is the greatest drawback of this material.At present, generally adopt the powder mixing machine explained hereafter, this is simple for process, flow process is few, low for equipment requirements, stock utilization is high, production cost is low, but that organize prepared contact is inhomogeneous, compactness is relatively poor, the arc erosion rate is high.
Summary of the invention
The objective of the invention is provides a kind of new silver-colored nickel graphite composite contact material and processing method thereof for solving the above-mentioned deficiency that existing silver-colored nickel graphite contact material exists.
Technical scheme of the present invention is: silver-colored nickel graphite composite contact material contains silver 65～75%, nickel 23%～32%, graphite 2%～3%.
The processing method of above-mentioned silver-colored nickel graphite composite contact material is characterized in that, may further comprise the steps:
(1) silver powder, nickel powder and the graphite powder of the said silver-colored nickel graphite composite contact material ingredient of outfit, the percentage by weight of silver powder, nickel powder and graphite powder is silver powder 65～75%, nickel powder 23%～32%, graphite powder 2%～3%;
(2) all to be prepared into concentration respectively be that 20～100g/l nickel nitrate solution, concentration are 50～300g/l liquor argenti nitratis ophthalmicus for silver powder and nickel powder;
(3) in reaction vessels, add the prepared 20～100g/l nickel nitrate solution of step (2) and 50～300g/l liquor argenti nitratis ophthalmicus; Under stirring state, slowly spraying into concentration is 10～50g/l sodium hydroxide solution, makes nickel ion, silver ion in the solution all generate Ag
2O+Ni (OH)
2The co-precipitation powder;
(4) with Ag
2O+Ni (OH)
2The co-precipitation powder cleans to neutral drying, cleans once more to neutral dry, reduction; Said baking temperature is 250～350 ℃, and be 20～25 hours drying time; The protective atmosphere of said reduction is hydrogen or decomposed ammonia, and reduction temperature is 400～500 ℃, and the recovery time is 3～5 hours;
(5) Ag after step (2) reduction
2O+Ni (OH)
2Powder adds the said graphite powder 2%～3% of step (1), in the wet mixing ball mill, carries out ball-milling treatment;
(6) with the wet-milling after step (5) ball-milling treatment through 50～100 ℃ of vacuum dryings 3～5 hours;, protective atmosphere anneals in being the atmosphere of hydrogen or decomposed ammonia; Annealing temperature is 600～720 ℃, and temperature retention time is 2～3 hours, makes silver-colored nickel graphite mixed powder after the annealing in process;
(7) silver-colored nickel graphite mixed powder first pressing is shaped, first pressing shaping unit pressure is 3～6T/cm
2, be to be 850～900 ℃ of sintering through temperature under the protection of hydrogen or decomposed ammonia at protective atmosphere, temperature retention time is annealed after being 3～4 hours, and annealing temperature is 650～750 ℃, and temperature retention time is 2～3 hours;
(8) material that step (7) is obtained carries out multiple repoussage shape, makes silver-colored nickel graphite composite contact material; The pressure of multiple repoussage shape is 10～12T/cm
2
Abrading-ball and powder weight ratio in the wet mixing ball mill of the said ball-milling treatment of step (5) are 5～10:10, and alcohol and powder weight ratio are 2～5:10, and the ball milling time is 10～15 hours.
Technology of the present invention is advanced; Material mixture ratio is reasonable; (1) utilize chemical coprecipitation, wet mixing ball-milling technology can improve the distribution in silver matrix of nickel, graphite granule; Improve the physical bond intensity of nonwetting storeroom, thereby obtain alloying powder, the mechanical performance of raising material, physical property, electrical property etc.(2) metallographic structure of silver-colored nickel graphite contact material is evenly tiny, has excellent mechanical and physical performance, and the contact material density of processing is big, and conductance is significantly optimized, and has improved the arc resistant corrosive power.
Embodiment
The silver-colored nickel graphite composite contact material of preparation 500kg, its technological process is: liquor argenti nitratis ophthalmicus, nickel nitrate solution → NaOH solution → Ag
2O+Ni (OH)
2→ clean extremely neutrality → oven dry → cleaning to neutrality → oven dry → reduction → wet mixing ball milling → vacuum drying → annealing in process → first pressing shaping → sintering → once pressure → annealing in process → secondary is pressed → surface treatment → silver-colored nickel graphite composite contact material again again.
Concrete processing step is following:
(1) be equipped with silver powder, nickel powder and the graphite powder that said silver-colored nickel graphite composite contact material is contained, the percentage by weight of silver powder, nickel powder and graphite powder is silver powder 65～75%, nickel powder 23%～32%, graphite powder 2%～3%;
(2) all to be prepared into concentration respectively be that 20～100g/l nickel nitrate solution, concentration are 50～300g/l liquor argenti nitratis ophthalmicus for silver powder and nickel powder;
(3) in reaction vessels, add the prepared 20～100g/l nickel nitrate solution of step (2) and 50～300g/l liquor argenti nitratis ophthalmicus; Under stirring state, slowly spraying into concentration is 10～50g/l sodium hydroxide solution, makes nickel ion, silver ion in the solution all generate Ag
2O+Ni (OH)
2The co-precipitation powder;
(4) with Ag
2O+Ni (OH)
2The co-precipitation powder cleans to neutral drying, cleans once more to neutral dry, reduction; Said baking temperature is 250～350 ℃, and be 20～25 hours drying time; The protective atmosphere of said reduction is hydrogen or decomposed ammonia, and reduction temperature is 400～500 ℃, and the recovery time is 3～5 hours;
(5) Ag after step (2) reduction
2O+Ni (OH)
2Powder adds the said graphite powder 2%～3% of step (1), in the wet mixing ball mill, carries out ball-milling treatment; Abrading-ball in the wet mixing ball mill of said ball-milling treatment and powder weight ratio are 5～10:10, and alcohol and powder weight ratio are 2～5:10, and the ball milling time is 10～15 hours;
(6) with the wet-milling after step (5) ball-milling treatment through 50～100 ℃ of vacuum dryings 3～5 hours;, protective atmosphere anneals in being the atmosphere of hydrogen or decomposed ammonia; Annealing temperature is 600～720 ℃, and temperature retention time is 2～3 hours, makes silver-colored nickel graphite mixed powder after the annealing in process;
(7) silver-colored nickel graphite mixed powder first pressing is shaped, first pressing shaping unit pressure is 3～6T/cm
2, be to be 850～900 ℃ of sintering through temperature under the protection of hydrogen or decomposed ammonia at protective atmosphere, temperature retention time is annealed after being 3～4 hours, and annealing temperature is 650～750 ℃, and temperature retention time is 2～3 hours;
(8) it is 10～12T/cm that the material that step (7) is obtained carries out pressure
2Multiple pressure, annealing, carrying out a pressure again is 10～12T/cm
2After multiple the pressure, carry out surface treatment, make silver-colored nickel graphite composite contact material, the percentage by weight that this contact material contains silver, nickel, graphite is silver 65～75%, nickel 23%～32%, graphite 2%～3%.
Claims (3)
1. a silver-colored nickel graphite composite contact material is characterized in that, said contact material contains silver 65～75%, nickel 23%～32%, graphite 2%～3%.
2. the processing method of a silver-colored nickel graphite composite contact material as claimed in claim 1 is characterized in that, may further comprise the steps:
(1) silver powder, nickel powder and the graphite powder of the said silver-colored nickel graphite composite contact material ingredient of outfit, the percentage by weight of silver powder, nickel powder and graphite powder is silver powder 65～75%, nickel powder 23%～32%, graphite powder 2%～3%;
(2) all to be prepared into concentration respectively be that 20～100g/l nickel nitrate solution, concentration are 50～300g/l liquor argenti nitratis ophthalmicus for silver powder and nickel powder;
(3) in reaction vessels, add the prepared 20～100g/l nickel nitrate solution of step (2) and 50～300g/l liquor argenti nitratis ophthalmicus; Under stirring state, slowly spraying into concentration is 10～50g/l sodium hydroxide solution, makes nickel ion, silver ion in the solution all generate Ag
2O+Ni (OH)
2The co-precipitation powder;
(4) with Ag
2O+Ni (OH)
2The co-precipitation powder cleans to neutral drying, cleans once more to neutral dry, reduction; Said baking temperature is 250～350 ℃, and be 20～25 hours drying time; The protective atmosphere of said reduction is hydrogen or decomposed ammonia, and reduction temperature is 400～500 ℃, and the recovery time is 3～5 hours;
(5) Ag after step (2) reduction
2O+Ni (OH)
2Powder adds the said graphite powder 2%～3% of step (1), in the wet mixing ball mill, carries out ball-milling treatment;
(6) with the wet-milling after step (5) ball-milling treatment through 50～100 ℃ of vacuum dryings 3～5 hours;, protective atmosphere anneals in being the atmosphere of hydrogen or decomposed ammonia; Annealing temperature is 600～720 ℃, and temperature retention time is 2～3 hours, makes silver-colored nickel graphite mixed powder after the annealing in process;
(7) silver-colored nickel graphite mixed powder first pressing is shaped, first pressing shaping unit pressure is 3～6T/cm
2, be to be 850～900 ℃ of sintering through temperature under the protection of hydrogen or decomposed ammonia at protective atmosphere, temperature retention time is annealed after being 3～4 hours, and annealing temperature is 650～750 ℃, and temperature retention time is 2～3 hours;
(8) material that step (7) is obtained carries out multiple repoussage shape, makes silver-colored nickel graphite composite contact material; The pressure of multiple repoussage shape is 10～12T/cm
2
3. the processing method of silver-colored nickel graphite composite contact material according to claim 2; It is characterized in that; Abrading-ball and powder weight ratio in the wet mixing ball mill of the said ball-milling treatment of step (5) are 5～10:10, and alcohol and powder weight ratio are 2～5:10, and the ball milling time is 10～15 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210226205.2A CN102737863B (en) | 2012-07-03 | 2012-07-03 | Silver nickel graphite composite contact terminal material and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210226205.2A CN102737863B (en) | 2012-07-03 | 2012-07-03 | Silver nickel graphite composite contact terminal material and processing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102737863A true CN102737863A (en) | 2012-10-17 |
| CN102737863B CN102737863B (en) | 2015-01-28 |
Family
ID=46993166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210226205.2A Expired - Fee Related CN102737863B (en) | 2012-07-03 | 2012-07-03 | Silver nickel graphite composite contact terminal material and processing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102737863B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439249A (en) * | 2014-12-30 | 2015-03-25 | 桂林电器科学研究院有限公司 | Method for processing sheet silver nickel electric contact material |
| CN104493170A (en) * | 2014-12-30 | 2015-04-08 | 桂林电器科学研究院有限公司 | Preparation method of flakey or rivet-shaped silver and tungsten electrical contact material |
| CN104525968A (en) * | 2014-12-30 | 2015-04-22 | 桂林电器科学研究院有限公司 | Flaky silver-tungsten electrical contact material preparation method |
| CN107633960A (en) * | 2017-09-11 | 2018-01-26 | 大连大学 | A kind of sheet iron reticulates Ag-based electrical contact material that distribution is strengthened and preparation method thereof |
| CN112501464A (en) * | 2020-11-18 | 2021-03-16 | 中国科学院金属研究所 | Silver-nickel composite material and preparation method thereof |
| CN113245547A (en) * | 2021-04-23 | 2021-08-13 | 福达合金材料股份有限公司 | Preparation method of silver-nickel graphite electrical contact with continuous decarburized layer on side surface |
| CN115483049A (en) * | 2022-09-20 | 2022-12-16 | 苏州西门子电器有限公司 | Preparation method and preparation system of silver graphite contact |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1555074A (en) * | 2003-12-23 | 2004-12-15 | 哈尔滨东大电工有限责任公司 | Electric contact material for low voltage electric appliance |
| CN1848323A (en) * | 2006-03-17 | 2006-10-18 | 乐百令 | Silver-nickel electric contact producing technology |
| CN101403105A (en) * | 2008-11-19 | 2009-04-08 | 河北工业大学 | Preparation method for carbon-coating nickel nano-particle reinforced silver-based composite material |
| CN101707146A (en) * | 2009-09-24 | 2010-05-12 | 温州宏丰电工合金有限公司 | Ag based electrical contact material and preparation method thereof |
| CN101976615A (en) * | 2010-08-31 | 2011-02-16 | 扬州乐银合金科技有限公司 | Silver tungsten carbide graphite contact material and preparation method thereof |
| CN102392170A (en) * | 2011-11-11 | 2012-03-28 | 扬州乐银合金科技有限公司 | Processing method for manufacturing silver tungsten composite contact material |
-
2012
- 2012-07-03 CN CN201210226205.2A patent/CN102737863B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1555074A (en) * | 2003-12-23 | 2004-12-15 | 哈尔滨东大电工有限责任公司 | Electric contact material for low voltage electric appliance |
| CN1848323A (en) * | 2006-03-17 | 2006-10-18 | 乐百令 | Silver-nickel electric contact producing technology |
| CN101403105A (en) * | 2008-11-19 | 2009-04-08 | 河北工业大学 | Preparation method for carbon-coating nickel nano-particle reinforced silver-based composite material |
| CN101707146A (en) * | 2009-09-24 | 2010-05-12 | 温州宏丰电工合金有限公司 | Ag based electrical contact material and preparation method thereof |
| CN101976615A (en) * | 2010-08-31 | 2011-02-16 | 扬州乐银合金科技有限公司 | Silver tungsten carbide graphite contact material and preparation method thereof |
| CN102392170A (en) * | 2011-11-11 | 2012-03-28 | 扬州乐银合金科技有限公司 | Processing method for manufacturing silver tungsten composite contact material |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439249A (en) * | 2014-12-30 | 2015-03-25 | 桂林电器科学研究院有限公司 | Method for processing sheet silver nickel electric contact material |
| CN104493170A (en) * | 2014-12-30 | 2015-04-08 | 桂林电器科学研究院有限公司 | Preparation method of flakey or rivet-shaped silver and tungsten electrical contact material |
| CN104525968A (en) * | 2014-12-30 | 2015-04-22 | 桂林电器科学研究院有限公司 | Flaky silver-tungsten electrical contact material preparation method |
| CN107633960A (en) * | 2017-09-11 | 2018-01-26 | 大连大学 | A kind of sheet iron reticulates Ag-based electrical contact material that distribution is strengthened and preparation method thereof |
| CN108054031A (en) * | 2017-09-11 | 2018-05-18 | 大连大学 | A kind of sheet iron reticulates the Ag-based electrical contact material that distribution is strengthened |
| CN108054031B (en) * | 2017-09-11 | 2019-10-25 | 大连大学 | A kind of sheet iron reticulates the Ag-based electrical contact material of distribution reinforcing |
| CN112501464A (en) * | 2020-11-18 | 2021-03-16 | 中国科学院金属研究所 | Silver-nickel composite material and preparation method thereof |
| CN113245547A (en) * | 2021-04-23 | 2021-08-13 | 福达合金材料股份有限公司 | Preparation method of silver-nickel graphite electrical contact with continuous decarburized layer on side surface |
| CN113245547B (en) * | 2021-04-23 | 2022-06-10 | 浙江福达合金材料科技有限公司 | Preparation method of silver-nickel graphite electrical contact with continuous decarburized layer on side surface |
| CN115483049A (en) * | 2022-09-20 | 2022-12-16 | 苏州西门子电器有限公司 | Preparation method and preparation system of silver graphite contact |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102737863B (en) | 2015-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102737863B (en) | Silver nickel graphite composite contact terminal material and processing method thereof | |
| CN101976615B (en) | Silver tungsten carbide graphite contact material and preparation method thereof | |
| CN107794389B (en) | Silver tin oxide indium oxide electric contact material and preparation method thereof | |
| CN101510479B (en) | Method for preparing siller tin oxide electric contact material | |
| TWI577640B (en) | Nickel-lithium metal composite oxide powder and method for producing same,positive electrode active material for lithium ion battery, positive electrode for lithium ion battery and lithium ion battery | |
| CN104480335B (en) | A kind of preparation method of silver tungsten contact material | |
| CN102392170A (en) | Processing method for manufacturing silver tungsten composite contact material | |
| CN101127253B (en) | Silver nickel electricity-conductive ceramic electrical contact material and its production method | |
| CN106086495B (en) | Cupric oxide doped siller tin oxide composite and preparation method thereof | |
| CN102683050A (en) | Preparation method of nano Ag-SnO2 electric contact composite | |
| CN110064762B (en) | Silver tungsten carbide contact material and preparation method thereof | |
| CN101707156B (en) | Method for preparing Ag-ZnO-doped electrical contact material | |
| CN108677048A (en) | A kind of silver-based composite material of nitrogen-doped graphene and preparation method thereof | |
| CN108557856A (en) | A kind of calcium oxide particle and preparation method thereof based on vacuum-sintering | |
| CN104538213B (en) | Titanium boride enhancement silver-based contact material and preparing method thereof | |
| CN111834136B (en) | MAX @ M composite electrical contact enhanced phase material, composite electrical contact material and preparation method | |
| CN102800513A (en) | Preparation method for preparing silver nickel materials by means of electrical contacts | |
| CN104889416A (en) | Preparation method of silver tin dioxide intermediate composite powder | |
| CN105349820A (en) | Copper-based electrical contact composite material and discharge plasma sintering process thereof | |
| CN1925078A (en) | Method for manufacturing sliver oxidized tin contactor materials | |
| CN108615633A (en) | A kind of manufacturing method of contacts of vacuum switch | |
| CN205230854U (en) | A contact material for circuit breaker | |
| CN110373566B (en) | AgWCC electric contact material with special tissue structure and preparation method | |
| CN110129603B (en) | Method for manufacturing silver-tungsten contact material and product thereof | |
| CN100369171C (en) | Silver base rare earth alloy contact material for low-voltage switch electric appliance and method for preparing same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20150703 |
|
| EXPY | Termination of patent right or utility model |