CN101707145A - Fiber structure silver-based electrical contact material and preparation method thereof - Google Patents
Fiber structure silver-based electrical contact material and preparation method thereof Download PDFInfo
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- CN101707145A CN101707145A CN200910196283A CN200910196283A CN101707145A CN 101707145 A CN101707145 A CN 101707145A CN 200910196283 A CN200910196283 A CN 200910196283A CN 200910196283 A CN200910196283 A CN 200910196283A CN 101707145 A CN101707145 A CN 101707145A
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Abstract
The invention discloses a fiber structure silver-based electrical contact material and a preparation method thereof; the material has continuous or discontinuous fibrous wild phase and comprises a fibrous wild phase silver-based electrical contact material or fibrous wild phase B; the silver-based electrical contact material B relates to all the electrical contact material systems which can be prepared by adopting an extrusion method; the diameter of the fibrous wild phase region is between 1 mum and 100 mum; and the form of the wild phase is fiber or particle. The composite material is prepared by the mode of combining a powder metallurgy method with the extrusion method. The melting-welding resistance and arc ablation resistance of the material prepared by the method are all greatly improved compared with the electrical contact material prepared by traditional method.
Description
Technical field
The present invention relates to the electrical contact material in a kind of material technology field and preparation method thereof, specifically, what relate to is a kind of fiber structure silver-based electrical contact material and preparation method thereof.
Background technology
Along with the fast development of electrical apparatus industry, the application of appliance switch has proposed more and more higher instructions for use for the performance of electrical contact material.Be specially high resistance fusion welding, high arc ablation resistance ability and excellent electric conductivity.At above requirement, the researcher has made extensive work both at home and abroad.Mainly get on to improve performance from material component design and wild phase disperse uniformity coefficient.Find that wherein the wild phase particle has filamentary structure in the material that adopts the pressing method preparation, than the wild phase structure that disperse distributes, this kind structure has better anti-melting welding and arc ablation resistance ability.But simple passing through mixes powder, sintering, extrusion, and formed filamentary structure is not obvious, and continuity is not enough.
Through prior art is retrieved discovery, the virgin meaning of Wang Yong root is equalled article---" technical study of fiber composite AgNi wire rod " delivered on 2006 at " the 5th national electrical alloy technical conferences ", propose in this article: by improving fashion of extrusion, the mode that increases deflection can obtain to have more obvious fibrous Ni fiber reinforcement phase, and points out that fibrous Ni fiber reinforcement helps to improve the electrical contact performance of material mutually.But by the fiber reinforcement phase of follow-up deformation method acquisition, still there is the not enough defective of fibre structure continuity in its filamentary structure purely.
Summary of the invention
The present invention is directed to deficiency and defective that above-mentioned prior art exists, a kind of fiber structure silver-based electrical contact material and preparation method thereof is provided, can obtain having the electrical contact material of obvious filamentary structure, this material resistance fusion welding and arc ablation resistance performance all are greatly increased.
For realizing above-mentioned purpose, the technical solution used in the present invention is:
The invention provides a kind of fiber structure silver-based electrical contact material, this material has tangible fibrous wild phase, comprises fibrous enhancing Ag-based electrical contact material B, and Ag-based electrical contact material B can adopt the electrical contact material system of pressing method preparation for all.Fibrous wild phase regional diameter is between 1 μ m-100 μ m; The wild phase form is fiber or particle form.
The invention provides a kind of preparation method of above-mentioned fiber structure silver-based electrical contact material, may further comprise the steps:
1) at first obtains the Ag-based electrical contact material powders A that a kind of suitable pressing method prepares.
Described electrical contact material powders A is characterized by the Ag-based electrical contact material powder that all are fit to extruding.
2) the silk material is fixed in the mould.Silk material diameter is 1～10mm, and the fixing position of silk material is symmetrically distributed with mold center.Diameter, number and the corresponding mould diameter of silk material calculates with material composition prescription aequum and obtains.
Described silk assortment class is meant all electrical contact material systems or the electrical contact material wild phase that all can adopt the pressing method preparation.
3) the electrical contact material powders A that the first step is obtained is poured in second mould that goes on foot and is carried out pre-molding.
4) base substrate that the 3rd step pre-molding is obtained carries out isostatic cool pressing.
5) base substrate that isostatic cool pressing is obtained carries out sintering.
6) base substrate after the hot pressing is carried out hot extrusion, obtain the fibre structure electrical contact material.
Further, the silk material that the step 6) hot extrusion obtains can be used as step 2 according to material composition design needs) middle silk material, according to the above-mentioned steps cycles prepare.
The material that the present invention obtained, adopting base substrate to design in advance with pressing method combines, make and have tangible fibrous wild phase institutional framework in the material structure, the same material system contact material that the simple Dispersion of Particles of its arc ablation resistance energy force rate strengthens improves 10-20%, improve 5-10% along direction of extrusion conductance, resistance fusion welding improves 10-20%.
Embodiment
Below technical scheme of the present invention is further described, the following description is only for understanding the usefulness of technical solution of the present invention, is not used in to limit scope of the present invention, protection scope of the present invention is as the criterion with claims.
Embodiment one
With preparation Ag-5CdO-5Ni contact material is example
The first step obtains the Ag-10CdO particle and strengthens the silver electric contact composite powder
AgCd (Cd weight accounts for 8%, and surplus is silver) alloy powder is crossed 100 mesh sieves, then the AgCd alloy powder is placed 600 ℃ of high temperature, oxygen is pressed 1MPa, pre-oxidation 3 hours.
Second step was that the Ni silk of 1mm places mould with diameter, and Ni silk number is 60, and mould diameter is 36mm, and the Ni silk is arranged by mold base center symmetry vertical mold press face and got final product.
The Ag-10CdO powder that the 3rd step obtained the first step is poured in the second step mould and is carried out pre-molding, and pressure is 50MPa.
The precompressed base substrate that the 4th step obtained for the 3rd step carries out isostatic cool pressing, and isostatic cool pressing pressure is 200MPa
The isostatic cool pressing base substrate that the 5th step obtained for the 4th step carries out sintering, and sintering temperature is 850 ℃, sintering 5 hours.
The 6th step, the base substrate that hot pressing is good carried out hot extrusion, and 650 ℃ of extrusion temperatures are incubated 2 hours, and extrusion ratio is 300.
The final acquisition has the Ag-5CdO-5Ni material that N continuous i fiber reinforcing texture combines with disperse CdO particle enhancing structure.Wherein Ni wild phase diameter is 1 μ m, and tensile strength 285MPa is 2.3 μ Ω .cm along direction of extrusion resistivity, and hardness is 85HV.
Embodiment two is with preparation Ag-4ZnO-8SnO
2Material is an example
The first step obtains the Ag-6ZnO particle and strengthens the silver electric contact composite powder
AgZn (Zn weight accounts for 7%, and surplus is silver) alloy powder is crossed 100 mesh sieves, then the AgZn alloy powder is placed 600 ℃ of high temperature, oxygen is pressed 1MPa, and pre-oxidation 3 hours obtains the Ag-8ZnO powder.
Second step was the Ag-15SnO of 2mm with diameter
2The silk material places mould, and silk material number is 60, and diameter is 2mm, Ag-15SnO
2Silk is arranged by mold base center symmetry vertical mold press face and is got final product, and wherein mould diameter is 24mm.
The Ag-6ZnO powder that the 3rd step obtained the first step is poured in the second step mould and is carried out pre-molding, and pressure is 60MPa.
The precompressed base substrate that the 4th step obtained for the 3rd step carries out isostatic cool pressing, and isostatic cool pressing pressure is 100MPa
The isostatic cool pressing base substrate that the 5th step obtained for the 4th step carries out sintering, and sintering temperature is 830 ℃, sintering 8 hours.
The 6th step, the base substrate that hot pressing is good carried out hot extrusion, and 750 ℃ of extrusion temperatures are incubated 2 hours, and extrusion ratio is 150.
Final acquisition has SnO
2The Ag-4ZnO-8SnO that fibrous enhancing combines with disperse ZnO particle wild phase
2Material.Wherein fibrous wild phase regional diameter is 10 μ m, and tensile strength is 258MPa, is 3.4 μ Ω .cm along direction of extrusion resistivity, and hardness is 85HV.
Embodiment three is an example with preparation Ag-4ZnO-6CdO material
The first step obtains the Ag-8ZnO particle and strengthens the silver electric contact composite powder
AgZn (Zn weight accounts for 7%, and surplus is silver) alloy powder is crossed 100 mesh sieves, then the AgZn alloy powder is placed 600 ℃ of high temperature, oxygen is pressed 1MPa, and pre-oxidation 3 hours obtains the Ag-8ZnO powder.
Second step was that the Ag-12CdO silk material of 10mm places mould with diameter, and a silk material number is 60, and the Ag-12CdO silk is arranged by mold base center symmetry vertical mold press face and got final product, and mould diameter is 80mm.
The Ag-8ZnO powder that the 3rd step obtained the first step is poured in the second step mould and is carried out pre-molding, and pressure is 70MPa.
The precompressed base substrate that the 4th step obtained for the 3rd step carries out isostatic cool pressing, and isostatic cool pressing pressure is 150MPa
The isostatic cool pressing base substrate that the 5th step obtained for the 4th step carries out sintering, and sintering temperature is 880 ℃, sintering 6 hours.
The 6th step, the base substrate that hot pressing is good carried out hot extrusion, and 650 ℃ of extrusion temperatures are incubated 2 hours, and extrusion ratio is 200.
Final acquisition has the Ag-4ZnO-6CdO material that the fibrous wild phase of Ag-12CdO combines with disperse ZnO particle wild phase.Wherein fibrous wild phase regional diameter is 100 μ m, and tensile strength is 258MPa, is 3.4 μ Ω .cm along direction of extrusion resistivity, and hardness is 76HV.
Embodiment four is an example with preparation Ag-Ni10 material
The first step obtains pure Ag material powder.
Second step was that the Ni silk material of 10mm places mould with diameter, and a silk material number is 60, and the Ni silk is arranged by mold base center symmetry vertical mold press face and got final product, and mould diameter is 140mm.
The Ag powder that the 3rd step obtained the first step is poured in the second step mould and is carried out pre-molding, and pressure is 100MPa.
The precompressed base substrate that the 4th step obtained for the 3rd step carries out isostatic cool pressing, and isostatic cool pressing pressure is 160MPa
The isostatic cool pressing base substrate that the 5th step obtained for the 4th step carries out sintering, and sintering temperature is 850 ℃, sintering 8 hours.
The 6th step, the base substrate that hot pressing is good carried out hot extrusion, and 550 ℃ of extrusion temperatures are incubated 3 hours, and extrusion ratio is 360.
The 7th step as required silk material in second step, repeated 1 with the 6th Ag-Ni silk material that obtained of step)-6) the one step process cycles prepare obtains Ag-Ni silk material.Go on foot with the 7th again and obtain Ag-Ni silk material, repeat 1 as second step required silk material)-6) one step process cycles prepare acquisition Ag-Ni silk material.
Final acquisition has the fibre-reinforced Ag-Ni10 electrical contact material of Ni.Wherein fibrous wild phase regional diameter is 1 μ m, and tensile strength is 338MPa, is 1.8 μ Ω .cm along direction of extrusion resistivity, and hardness is 96HV.
Claims (5)
1. fiber structure silver-based electrical contact material, it is characterized in that, particle wild phase with fibrous wild phase and disperse, comprise fibrous wild phase Ag-based electrical contact material or fibrous wild phase B, Ag-based electrical contact material B is all electrical contact material systems that can adopt the pressing method preparation, and fibrous wild phase regional diameter is between 1 μ m-100 μ m; The wild phase form is fiber or particle form.
2. the preparation method of a fibre structure electrical contact material as claimed in claim 1 is characterized in that may further comprise the steps:
1) at first obtains a kind of Ag-based electrical contact material powders A;
2) the silk material is fixed in the mould, silk material diameter is 1～10mm, and the fixing position of silk material is symmetrically distributed with mold center, and diameter, number and the corresponding mould diameter of silk material calculate with required preparation material composition;
3) the electric contact composite material powders A that the first step is obtained is poured in second mould that goes on foot and is carried out pre-molding;
4) base substrate that the 3rd step pre-molding is obtained carries out isostatic cool pressing;
5) base substrate that isostatic cool pressing is obtained carries out sintering;
6) base substrate after the hot pressing is carried out hot extrusion, obtain fiber structure silver-based electrical contact material.
3. the preparation method of fiber structure silver-based electrical contact material as claimed in claim 2 is characterized in that, in the step 1), described Ag-based electrical contact material A is all Ag-based electrical contact material systems that are fit to adopt the pressing method preparation.
4. the preparation method of fiber structure silver-based electrical contact material as claimed in claim 2 is characterized in that step 2) in, described silk material, its kind is meant all electrical contact material systems or the electrical contact material wild phase that all can adopt the pressing method preparation.
5. the preparation method of fiber structure silver-based electrical contact material as claimed in claim 2 is characterized in that, the silk material that described step 6) hot extrusion obtains is as step 2) middle silk material, according to the above-mentioned steps cycles prepare.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935792A (en) * | 2010-09-08 | 2011-01-05 | 昆明理工大学 | Preparation method of fibriform metal copper oxide enhanced silver-based electric contact material |
| CN102002651A (en) * | 2010-12-03 | 2011-04-06 | 温州宏丰电工合金股份有限公司 | Method for preparing silver-based electrical contact material with fibrous structure |
| CN102176336A (en) * | 2010-12-30 | 2011-09-07 | 温州宏丰电工合金股份有限公司 | Preparation method of silver-based oxide electrical contact material with filamentary structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1624175A (en) * | 2003-12-02 | 2005-06-08 | 上海电器科学研究所（集团）有限公司 | Electric contact material of carbon nano pipe silver graphite and its preparation process |
| CN1760399A (en) * | 2004-10-15 | 2006-04-19 | 南京理工大学 | Method for preparing metal based composite material |
-
2009
- 2009-09-24 CN CN2009101962830A patent/CN101707145B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935792A (en) * | 2010-09-08 | 2011-01-05 | 昆明理工大学 | Preparation method of fibriform metal copper oxide enhanced silver-based electric contact material |
| CN102002651A (en) * | 2010-12-03 | 2011-04-06 | 温州宏丰电工合金股份有限公司 | Method for preparing silver-based electrical contact material with fibrous structure |
| WO2012071767A1 (en) | 2010-12-03 | 2012-06-07 | 温州宏丰电工合金股份有限公司 | Method for preparing fibrous silver-based electrical contact material |
| CN102002651B (en) * | 2010-12-03 | 2013-04-03 | 温州宏丰电工合金股份有限公司 | Method for preparing silver-based electrical contact material with fibrous structure |
| CN102176336A (en) * | 2010-12-30 | 2011-09-07 | 温州宏丰电工合金股份有限公司 | Preparation method of silver-based oxide electrical contact material with filamentary structure |
| WO2012088736A1 (en) | 2010-12-30 | 2012-07-05 | 温州宏丰电工合金股份有限公司 | Method for manufacturing ag based oxide electrical contact materials with fibrous structure |
| EP2537948A4 (en) * | 2010-12-30 | 2016-11-09 | Wenzhou Hongfeng Electrical Alloy Co Ltd | Method for manufacturing ag based oxide electrical contact materials with fibrous structure |
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| CN101707145B (en) | 2011-12-28 |
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