CN106086493A - A kind of fast low temperature sinters the method preparing CuCr alloy material - Google Patents
A kind of fast low temperature sinters the method preparing CuCr alloy material Download PDFInfo
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- CN106086493A CN106086493A CN201610681271.7A CN201610681271A CN106086493A CN 106086493 A CN106086493 A CN 106086493A CN 201610681271 A CN201610681271 A CN 201610681271A CN 106086493 A CN106086493 A CN 106086493A
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- sintering
- cucr alloy
- alloy material
- low temperature
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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
- C22C1/0425—Copper-based alloys
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
-
- 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
- C22C1/045—Alloys based on refractory metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/06—Alloys based on chromium
-
- 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
Abstract
A kind of fast low temperature sinters the method preparing CuCr alloy material, according to alloying component, according to the ratio that Cr weight content is 10wt%～90wt%, Ni metal powder and metal Cr powder is joined mixed powder.Put in discharge plasma sintering stove after the CuCr mixed powder prepared is loaded graphite jig, with 50～300 while applying pressureoC/min heating rate is warming up to sintering temperature, is incubated 1～5min, and furnace cooling, whole sintering processes are less than 20 minutes.The present invention can select different pressure conditions and sintering temperature according to different CuCr alloy materials, and preparation technology is simple, and the cycle is short, production efficiency is high, required production equipment is simple, environmentally friendly, and the CuCr alloy material composition prepared is uniform, the gaseous impurity content such as oxygen are extremely low, purity is high, dense structure, and Cr phase is tiny and is evenly distributed, good conductivity, can meet the needs of high-performance power transmission and transforming equipment.
Description
Technical field
The present invention relates to a kind of fast low temperature and sinter the method preparing CuCr alloy material, particularly belong to alloy material and prepare
Technical field.
Technical background
CuCr alloy is widely used in the leading material in the field such as derived energy chemical and Aero-Space.Require this in metallurgy
Plant material and there is good homogeneity of ingredients, the size of moderate Cr granule, high density and high-purity, suitable hardness, Yi Jili
The strong plasticity aspect learned can matched well.Owing to Cr has high chemism, it is difficult to form solid solution, therefore at copper with Cu
In the research and development quite a long time of evanohm, use the skeleton that powder metallurgical technique prepares Cr.Then ooze Cu and obtain
The material of definite shape；Sintered blank is carried out cold multiple pressure or hot re-pressing the most again, so that product reaches satisfactory close
Degree and intensity.
CuCr alloy, because having preferable dieletric strength and good drop-out current ability, is extensively used as contact material
In mesohigh vacuum circuit breaker.Gas, impurity content and displaing micro tissue topography etc. are the keys determining its performance.When in material
During containing higher oxygen content or more field trash, will greatly damage contact performance and even can not use.Micro-group of alloy
That knits uneven will produce segregation, drops low-alloyed serviceability.Cr phase in alloy is the most tiny, then dieletric strength is more
High.Therefore, constantly reducing the gas content in material, the pollution reducing field trash and microscopic structure fine uniform is development height
The key of performance CuCr contact material.
Comprehensive result of study both domestic and external shows, the performance of CuCr alloy depends on that the compactness of its organizational structure is with uniform
Property.Under conventional powder metallurgical sintering condition, mutually insoluble between metallic copper and chromium, wellability is poor, makes two kinds of powder be combined
Densification process carries out relative difficulty, and so far, the manufacture method of CuCr alloy mainly has following three kinds: (1) infiltration method；(2) cold
Pressure sintering process；(3) arc melting method.In metallurgical process, either infiltration still sinters, and alloy constituent element Cr is kept substantially solid
State distribution, and the size of granule is held essentially constant.Being affected by preparation technology, product is constantly present certain defect,
The performance and the life-span that cause material can have an impact.In mid-term in 20th century, Germany develops the electric arc melting technology of CuCr alloy, and throws
Enter commercial production.Domestic in recent years in addition to introducing this process equipment, it is also carried out test.In addition somebody is had both at home and abroad
Crucible induction melting, the engineer testing such as plasma melting, due to Cr and O2, N2It is easily generated chemical reaction, and the chromium generated aoxidizes
Thing is difficult to be reduced.Therefore the melting of CuCr alloy must be carried out in fine vacuum or inert protective atmosphere.The burning of alloy material
Knot is a lasting densification process, and in traditional sintering method, sintering temperature is the highest, and sintering time is the longest, and it is fine and close
Change degree is the biggest, but Cr phase can be caused thick simultaneously, thus affects the performance of CuCr alloy.Chinese patent 102728843B is open
A kind of preparation technology of CuCr contact material, the temperature that this technique prepares CuCr alloy is higher, and the time is long, and consistency is relatively low,
Gaseous impurity content is higher, and its serviceability is affected.How to control the sintering process of CuCr alloy, when being greatly shortened sintering
Between, it is achieved fast low temperature sinters, it is thus achieved that high intensity and the CuCr alloy of height densification, and this is expanding the application side of alloy material
Face is particularly important.
Summary of the invention
Preparing, for conventional sintering Technology, the problem that CuCr alloy material exists, the present invention provides a kind of fast low temperature
The method that sintering prepare CuCr alloy material, according to the ratio that Cr percentage by weight is 10wt%～90wt%, by Ni metal powder with
Metal Cr powder is configured to after copper chromium mixed powder to load graphite jig, places into discharge plasma sintering stove and carries out low temperature and quickly burn
Knot.Described low temperature Fast Sintering condition is: copper chromium mixed powder is applied pressure 20～100MPa, continues whole sintered
Journey；Vacuum is 10-1～10-3Pa；Sintering temperature is 800～900 DEG C, heating rate 50～300 DEG C/min, temperature retention time 1～
5min。
The invention have the advantages that the present invention can select different pressure conditions and sintering temperature according to different CuCr alloy materials
Degree, preparation technology is simple, and the cycle is short, and production efficiency is high, and required production equipment is simple, environmentally friendly, and the CuCr prepared
The gaseous impurity content such as alloy material composition is uniform, oxygen are extremely low, and purity is high, and material density is more than 99.5%, and Cr phase is tiny and divides
Cloth is uniform, and good conductivity can meet the needs of high-performance power transmission and transforming equipment.
Accompanying drawing explanation
Fig. 1: the CuCr alloy material Metallograph prepared by the present invention.
Detailed description of the invention
The present invention is further described below by specific embodiment.
Embodiment 1
After Cu, Cr mixed powder Mechanical Method that the weight ratio of Cu:Cr is 9:1 is dry mixed 4 hours, take the mixed powder of certain mass
Load graphite jig, put in discharging plasma sintering equipment, at vacuum >=1*10-2Pa, the pressure of sintering is the bar of 20MPa
Under part, with 200oC/min heating rate is warming up to 850 DEG C, is incubated 5min, furnace cooling, obtains high densification and high intensity
CuCr alloy.
The CuCr alloy material density after tested of above-mentioned gained is 8.68g/cm3, hardness (HB) 80, hence it is evident that higher than commercially available product
The performance of product.
Embodiment 2
After Cu, Cr mixed powder Mechanical Method that the weight ratio of Cu:Cr is 7:3 is dry mixed 4 hours, take the mixed powder of certain mass
Load graphite jig, put in discharging plasma sintering equipment, at vacuum >=5*10-2Pa, the pressure of sintering is the bar of 50MPa
Under part, with 200oC/min heating rate is warming up to 850 DEG C, is incubated 3min, furnace cooling, obtains completely fine and close and high intensity
CuCr alloy.
The CuCr alloy material density after tested of above-mentioned gained is 8.228g/cm3, hardness (HB) 83, hence it is evident that higher than commercially available
The performance of product.
Embodiment 3
After Cu, Cr mixed powder Mechanical Method that the weight ratio of Cu:Cr is 5:5 is dry mixed 4 hours, take the mixed powder of certain mass
Load graphite jig, put in discharging plasma sintering equipment, at vacuum >=5*10-3Pa, the pressure of sintering is 100MPa's
Under the conditions of, with 200oC/min heating rate is warming up to 900 DEG C, is incubated 3min, furnace cooling, obtains completely fine and close and high intensity
CuCr alloy.
The CuCr alloy material density after tested of above-mentioned gained is 7.95g/cm3, hardness (HB) 86, hence it is evident that higher than commercially available product
The performance of product.
The above is only the citing of embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, on the premise of without departing from the technology of the present invention principle, it is also possible to make some improvement and modification, these improve and become
Type also should be regarded as protection scope of the present invention.
Claims (1)
1. a fast low temperature sinters the method preparing CuCr alloy material, it is characterised in that: described method is: according to Cr weight
Amount percentage ratio is the ratio of 10wt%～90wt%, loads graphite after Ni metal powder and metal Cr powder are configured to copper chromium mixed powder
Mould, places into discharge plasma sintering stove and carries out low temperature Fast Sintering；Described low temperature Fast Sintering condition is: mix copper chromium
Close powder body and apply pressure 20～100MPa, continue whole sintering process；Vacuum is 10-1～10-3Pa；Sintering temperature be 800～
900 DEG C, heating rate 50～300 DEG C/min, temperature retention time 1～5min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610681271.7A CN106086493B (en) | 2016-08-18 | 2016-08-18 | A kind of method that fast low temperature sintering prepares CuCr alloy materials |
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| CN201610681271.7A CN106086493B (en) | 2016-08-18 | 2016-08-18 | A kind of method that fast low temperature sintering prepares CuCr alloy materials |
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| CN106086493B CN106086493B (en) | 2018-02-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107931607A (en) * | 2017-11-17 | 2018-04-20 | 北京科技大学 | A kind of method using laser gain material technology manufacture chromiumcopper |
| CN108559867A (en) * | 2018-05-15 | 2018-09-21 | 北京科技大学 | A kind of high conductivity CuCr30 contact materials and preparation method thereof |
| CN113337741A (en) * | 2021-04-09 | 2021-09-03 | 陕西斯瑞新材料股份有限公司 | Method for preparing CuCr alloy by utilizing Cr powder plasma-assisted vacuum induction melting |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060088437A1 (en) * | 2004-10-22 | 2006-04-27 | Russell Nippert | Copper based precipitation hardening alloy |
| CN102522241A (en) * | 2011-12-12 | 2012-06-27 | 清华大学 | CuCr alloy contact material and preparation method thereof |
| CN102728843A (en) * | 2012-07-12 | 2012-10-17 | 陕西斯瑞工业有限责任公司 | Preparation method for copper-chromium alloy powder and preparation method for copper-chromium contacts |
| CN103943382A (en) * | 2014-04-25 | 2014-07-23 | 东北大学 | Method for manufacturing CuCr electrical contact materials through copper surface electrolytic chrome in sintering mode |
| CN104946915A (en) * | 2015-07-03 | 2015-09-30 | 东北大学 | Preparation method of fine-grained CuCr alloy |
-
2016
- 2016-08-18 CN CN201610681271.7A patent/CN106086493B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060088437A1 (en) * | 2004-10-22 | 2006-04-27 | Russell Nippert | Copper based precipitation hardening alloy |
| CN102522241A (en) * | 2011-12-12 | 2012-06-27 | 清华大学 | CuCr alloy contact material and preparation method thereof |
| CN102728843A (en) * | 2012-07-12 | 2012-10-17 | 陕西斯瑞工业有限责任公司 | Preparation method for copper-chromium alloy powder and preparation method for copper-chromium contacts |
| CN103943382A (en) * | 2014-04-25 | 2014-07-23 | 东北大学 | Method for manufacturing CuCr electrical contact materials through copper surface electrolytic chrome in sintering mode |
| CN104946915A (en) * | 2015-07-03 | 2015-09-30 | 东北大学 | Preparation method of fine-grained CuCr alloy |
Non-Patent Citations (1)
| Title |
|---|
| 史昆玉: "《中国博士学位论文全文数据库 工程科技1辑》", 15 February 2015 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107931607A (en) * | 2017-11-17 | 2018-04-20 | 北京科技大学 | A kind of method using laser gain material technology manufacture chromiumcopper |
| CN108559867A (en) * | 2018-05-15 | 2018-09-21 | 北京科技大学 | A kind of high conductivity CuCr30 contact materials and preparation method thereof |
| CN113337741A (en) * | 2021-04-09 | 2021-09-03 | 陕西斯瑞新材料股份有限公司 | Method for preparing CuCr alloy by utilizing Cr powder plasma-assisted vacuum induction melting |
| CN113337741B (en) * | 2021-04-09 | 2022-01-28 | 陕西斯瑞新材料股份有限公司 | Method for preparing CuCr alloy by utilizing Cr powder plasma-assisted vacuum induction melting |
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| CN106086493B (en) | 2018-02-09 |
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Effective date of registration: 20200429 Address after: 221000 c513, University Pioneer Park, high tech Zone, No. 99, University Road, Tongshan District, Xuzhou City, Jiangsu Province Patentee after: Xuzhou Ruidi New Material Technology Co., Ltd Address before: 341000 No. 156, Hakka Road, Ganzhou, Jiangxi Patentee before: BUDDHIST TZU CHI GENERAL HOSPITAL |
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