CN1164452A - Method for preparing hydraulic atomized silver powder - Google Patents
Method for preparing hydraulic atomized silver powder Download PDFInfo
- Publication number
- CN1164452A CN1164452A CN 96105437 CN96105437A CN1164452A CN 1164452 A CN1164452 A CN 1164452A CN 96105437 CN96105437 CN 96105437 CN 96105437 A CN96105437 A CN 96105437A CN 1164452 A CN1164452 A CN 1164452A
- Authority
- CN
- China
- Prior art keywords
- silver
- powder
- silver powder
- hydraulic atomized
- contact material
- 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
Images
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention uses distilled water or processed pure water as atomization medium, regulates injector nozzle gap and angle to form a high-pressure water jet stream whose pressure is greater than 50MPa and impinge on the molten pure silver flow to atomize the molten silver flow and make one into irregular silver powder whose grain size is less than 40 micrometers. The obtained silver powder is passed through such process of acid-washing, removing impurities and surface-cleaning, mechanically-crushing, heat treatment and mixing with other metal powder material, and can be made into silver=-based contact material. The silver powder obtained by using said ivnented method is high in fineness, good in compressibility, low in cost, short in production period and high in purity. Its purity can be up to 99.9%.
Description
The present invention relates to a kind of manufacture method of hydraulic atomized silver powder, particularly a kind of manufacture method that is used for the hydraulic atomized silver powder of powder metallurgic method production silver based contact material.
Powder by atomization is an optimised process of producing pre-alloyed powder, is widely used in the production of metal or alloy powder such as iron powder, aluminium powder, copper powder.Now be used for the silver alloy powder of silver based contact material, also begun to adopt powder by atomization technology as silver-cadmium alloy powder, silver-colored tin alloy powder etc.But adopt the silver powder of existing atomization process production can't be used to make contact material because of problems such as impurity, granularity and particle surface defectives.Powder metallurgic method is made silver based contact material at present, is with chemical method or electrolysis production as used fine silver powder of contact material such as silver-colored nickel, silver-colored graphite, silver-colored tungsten, silver-colored tungsten carbides.Silver powder cost height and contaminated environment that these two kinds of methods are produced.
The new manufacture method that the purpose of this invention is to provide a kind of hydraulic atomized silver powder, adopt the silver powder of this kind method manufacturing to make the satisfactory silver based contact material of performance by the powder metallurgic method common process, and this kind method manufacturing silver powder is with short production cycle, and cost is low, and is free from environmental pollution.
The manufacture method of hydraulic atomized silver powder provided by the invention is as follows: adopt distilled water or treated pure water as atomizing medium, regulate the high-pressure water jet of nozzle gap and angle formation greater than 50MPa, the fine silver liquid of impact fusion stream makes it be atomized in irregular shape, the granularity silver powder less than 40 μ m.Gained silver powder is removed the surface cleaning of impurity through pickling, again through Mechanical Crushing and heat treatment, can with other metal material powder, mix as nickel powder, graphite powder, tungsten powder or tungsten carbide powder, technological forming-sintering-extruding routinely-rolling or drawing, perhaps compacting-sintering-multiple pressure-resintering is made contact materials such as silver-colored nickel, silver-colored graphite, silver-colored tungsten or silver-colored tungsten carbide.
Advantage of the present invention is: 1. high-pressure atomization gained silver powder fineness height, and compressibility is good; 2. to adopt distilled water or treated pure water be atomizing medium and handle through multiple tracks powder process and to make silver powder purity can reach 99.9%; 3. can control the silver powder particles form by regulating nozzle, and silver powder is easy to evenly mix powder through surface treatment; 4. with short production cycle, cost is low, and is free from environmental pollution.
Describe embodiments of the invention in detail below in conjunction with accompanying drawing.
Fig. 1 is the device for making schematic diagram of present embodiment hydraulic atomized silver powder.
The horizontal section metallograph of AgNi10 wire rod that Fig. 2 produces for present embodiment.
The vertical section metallograph of AgNi10 wire rod that Fig. 3 produces for present embodiment.
Most preferred embodiment of the present invention as shown in Figure 1.Deposit distilled water or treated pure water in the water tank (1).High-pressure hydraulic pump (3) is gone into nozzle system through filter (2) with hydraulic pressure, is the high-pressure water jet (8) of 50～70MPa from nozzle (7) ejection pressure.Stock silver heating and melting in medium frequency induction melting furnace (4) is superheated to 1100～1300 ℃, injects insulation bottom pour ladle (5) and forms silvering solution stream (6).Silvering solution stream (6) is atomized into silver powder in atomizing container (9) under the impact of the high-pressure water jet (8) that sprays from nozzle (7).By regulating the gap and the angle of nozzle, pressure, speed and the direction of regulating water jet, thereby the particle shape and the size of control atomizing silver powder.The silver powder that riffle (10) is collected sieves, and wherein granularity accounts for 80% less than 40 μ m.Silver powder after sieving is removed impurity with 20% or following sulfuric acid cleaned, carries out surface cleaning and handles.Silver powder after the purification adopts the reinforcement ball milling to carry out Mechanical Crushing once more, makes powder not have caking and further refinement, and changes the shape of powder particle, the flowability of raising silver powder.And then, under gas shield, be heated to 600～700 ℃ to the silver powder heat treatment of annealing, be incubated 1～3 hour, progressively cooling.Silver powder is purified once more, eliminate the internal stress and the surfaces hardened of powder particle simultaneously.Gained silver powder and nickel powder evenly mix in proportion, and the AgNi10 wire rod is made in technological forming-sintering-extruding-drawing routinely afterwards.Fig. 2 is that the horizontal section of present embodiment gained AgNi10 wire rod amplifies 200 times of metallographs, and Fig. 3 is that the vertical section of AgNi10 wire rod amplifies 200 times of metallographs.The performance comparison of the AgNi10 wire rod that made AgNi10 wire rod of present embodiment and chemical method silver powder make sees the following form.
| Tensile strength (MPa) | Percentage elongation (100cm%) | Resistivity (μ Ω cm) | |
| The made AgNi10 wire rod of present embodiment | ????370 | ??2.5～3.5 | ????＜2 |
| The made AgNi10 wire rod of chemical method silver powder | ????350 | ??2.0～2.5 | ????＜2 |
Claims (3)
1. the manufacture method of a hydraulic atomized silver powder, particularly a kind of manufacture method that is used for the hydraulic atomized silver powder of powder metallurgic method production silver based contact material, its high-pressure water shot flowing pressure that impacts silvering solution stream is greater than 50MPa, it is characterized by and adopting distilled water or treated pure water is atomizing medium, and gained atomizing silver powder is through overpickling, Mechanical Crushing and heat treatment.
2. the manufacture method that is used for the hydraulic atomized silver powder of powder metallurgic method production silver based contact material as claimed in claim 1 is characterized by gained atomizing silver powder and adopts concentration 20% or following sulfuric acid cleaned.
3. as claimed in claim 1ly be used for the manufacture method that powder metallurgic method is produced the hydraulic atomized silver powder of silver based contact material, it is characterized by gained atomizing silver powder and under gas shield, be heated to the progressively cooling heat treatment of annealing of 600～700 ℃ of insulations 1～3 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96105437A CN1058918C (en) | 1996-05-07 | 1996-05-07 | Method for preparing hydraulic atomized silver powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96105437A CN1058918C (en) | 1996-05-07 | 1996-05-07 | Method for preparing hydraulic atomized silver powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1164452A true CN1164452A (en) | 1997-11-12 |
| CN1058918C CN1058918C (en) | 2000-11-29 |
Family
ID=5118896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96105437A Expired - Lifetime CN1058918C (en) | 1996-05-07 | 1996-05-07 | Method for preparing hydraulic atomized silver powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1058918C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161098A (en) * | 2011-03-29 | 2011-08-24 | 长沙拓智金属材料科技有限责任公司 | Method for preparing low-oxygen content superfine pre-alloyed powder through ultrahigh pressure water and gas combined atomization |
| CN103056374A (en) * | 2011-10-22 | 2013-04-24 | 湖南省冶金材料研究所 | Method for preparing prealloy powder for low-oxygen-content micro-diamond product and using ultrahigh-pressure water atomization |
| CN104668569A (en) * | 2015-02-13 | 2015-06-03 | 江永斌 | Cooling method for high-purity super-fine metal powder |
| JP2017082327A (en) * | 2015-10-30 | 2017-05-18 | Ｄｏｗａエレクトロニクス株式会社 | Silver powder and method for producing the same |
| CN107127348A (en) * | 2017-06-15 | 2017-09-05 | 北京康普锡威科技有限公司 | A kind of preparation method of MIM metal dusts |
| CN107570712A (en) * | 2016-07-04 | 2018-01-12 | 现代自动车株式会社 | Method and apparatus for producing iron powder |
| CN110310756A (en) * | 2019-06-28 | 2019-10-08 | 智玻蓝新科技(武汉)有限公司 | A kind of preparation process of the dedicated conductive silver powder of glass base circuit board |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2639107A1 (en) * | 1976-08-31 | 1978-03-02 | Siemens Ag | PROCESS FOR MANUFACTURING A CONTACT PIECE FROM SILVER AND AT LEAST TWO OXIDES OF BASE METALS |
| CA1219414A (en) * | 1984-12-17 | 1987-03-24 | Charles B. Goodrich | Water atomization of metal |
-
1996
- 1996-05-07 CN CN96105437A patent/CN1058918C/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161098A (en) * | 2011-03-29 | 2011-08-24 | 长沙拓智金属材料科技有限责任公司 | Method for preparing low-oxygen content superfine pre-alloyed powder through ultrahigh pressure water and gas combined atomization |
| CN103056374A (en) * | 2011-10-22 | 2013-04-24 | 湖南省冶金材料研究所 | Method for preparing prealloy powder for low-oxygen-content micro-diamond product and using ultrahigh-pressure water atomization |
| CN104668569A (en) * | 2015-02-13 | 2015-06-03 | 江永斌 | Cooling method for high-purity super-fine metal powder |
| CN108349009A (en) * | 2015-10-30 | 2018-07-31 | 同和电子科技有限公司 | Silver powder and its manufacturing method |
| JP2017082327A (en) * | 2015-10-30 | 2017-05-18 | Ｄｏｗａエレクトロニクス株式会社 | Silver powder and method for producing the same |
| US20180326497A1 (en) * | 2015-10-30 | 2018-11-15 | Dowa Electronics Materials Co., Ltd. | Silver powder and method for producing same |
| US10828702B2 (en) * | 2015-10-30 | 2020-11-10 | Dowa Electronics Materials Co., Ltd. | Silver powder and method for producing same |
| JP2021075799A (en) * | 2015-10-30 | 2021-05-20 | Ｄｏｗａエレクトロニクス株式会社 | Silver powder and method for producing the same |
| JP7110421B2 (en) | 2015-10-30 | 2022-08-01 | Ｄｏｗａエレクトロニクス株式会社 | Silver powder and its manufacturing method |
| CN107570712A (en) * | 2016-07-04 | 2018-01-12 | 现代自动车株式会社 | Method and apparatus for producing iron powder |
| CN107570712B (en) * | 2016-07-04 | 2022-03-11 | 现代自动车株式会社 | Method and apparatus for producing iron powder |
| CN107127348A (en) * | 2017-06-15 | 2017-09-05 | 北京康普锡威科技有限公司 | A kind of preparation method of MIM metal dusts |
| CN110310756A (en) * | 2019-06-28 | 2019-10-08 | 智玻蓝新科技(武汉)有限公司 | A kind of preparation process of the dedicated conductive silver powder of glass base circuit board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1058918C (en) | 2000-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Antony et al. | Processes for production of high-purity metal powders | |
| WO2018121688A1 (en) | 3d printing spherical powder preparation method utilizing plasma | |
| CN101298082B (en) | Continuous casting heat composite apparatus and method for preparing copper lead alloy-steel shaft bushing material | |
| CN110961646B (en) | Metal powder and method for producing the same | |
| CN109971989A (en) | It is a kind of high to lead high temperature resistant process for producing copper alloy | |
| CN107498059B (en) | A kind of method that aerosolization prepares partial size refinement titanium-based spherical powder | |
| CN1058918C (en) | Method for preparing hydraulic atomized silver powder | |
| CN111822725B (en) | Preparation method of alloy powder for recycling copper-chromium alloy | |
| CN110923693A (en) | Method for preparing Cu-Fe alloy by cold spraying process | |
| CN111112634A (en) | Device and method for preparing metal powder | |
| CN110273097B (en) | VC/V10 powder high-speed steel composite material and preparation method thereof | |
| CN114101690B (en) | Device based on gas-solid coupling atomization preparation metal powder | |
| CN113414397B (en) | Vacuum gas atomization continuous preparation method of iron-based metal powder | |
| CN212857768U (en) | Alloy powder preparation facilities | |
| CN107755707A (en) | The production method and production equipment of a kind of metal dust | |
| CN114990383B (en) | Titanium alloy for improving yield ratio of electrode induction smelting inert gas atomized powder fine powder and preparation method of atomized powder | |
| CN115007867B (en) | Method for preparing metal material by spray forming and spray forming device | |
| CN111118496A (en) | Tough high-entropy alloy forming structure and preparation method thereof | |
| CN215697993U (en) | Metal powder ultrasonic atomization equipment | |
| CN108004415A (en) | A kind of electronic torch melting furnace wall easy to clean metal coating and its spraying method and device | |
| CN113020605B (en) | Special in-situ toughening high-performance spherical tungsten powder for laser 3D printing and preparation method thereof | |
| AT410324B (en) | METAL PRODUCTION METHOD AND INSTALLATION, PREFERABLY FOR STEEL PRODUCTION, OF FINE-CARBON METAL OXIDE | |
| CN206351253U (en) | A kind of rapid solidification prepares the device of refining metallic powder | |
| CN114058895B (en) | Double nozzle spray forming Y 2 O 3 Process for particle reinforced Monel 400 alloy plate | |
| CN108914024A (en) | A kind of preparation method of amorphous alloy block materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUILIN ELECTRICAL EQUIPMENT SCIENTIFIC RESEARCH IN Free format text: FORMER NAME: GUILIN ELECTRIC EQUIPMENT SCIENCE INST., MINISTRY OF MACHINE BUILDING |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 541002 No. 1, Chen Shan Road, Guilin, the Guangxi Zhuang Autonomous Region Patentee after: Guilin Electrical Appliace Science Research Institute Address before: 541002 No. 1, Chen Shan Road, Guilin, the Guangxi Zhuang Autonomous Region Patentee before: Guilin Electric Equipment Science Inst., Ministry of Machine Building |
|
| C56 | Change in the name or address of the patentee |
Owner name: GUILIN ELECTRICAL EQUIPMENT SCIENTIFIC RESEARCH IN Free format text: FORMER NAME: GUILIN ELECTRICAL EQUIPMENT SCIENTIFIC RESEARCH INSTITUTE |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 541002 No. 1, Chen Shan Road, Guilin, the Guangxi Zhuang Autonomous Region Patentee after: Guilin Electrical Equipment Scientific Research Institute Co., Ltd. Address before: 541002 No. 1, Chen Shan Road, Guilin, the Guangxi Zhuang Autonomous Region Patentee before: Guilin Electrical Appliace Science Research Institute |
|
| CX01 | Expiry of patent term |
Granted publication date: 20001129 |
|
| EXPY | Termination of patent right or utility model |