CN107591257A - A kind of silver-based MULTILAYER COMPOSITE contact material and preparation method thereof - Google Patents
A kind of silver-based MULTILAYER COMPOSITE contact material and preparation method thereof Download PDFInfo
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- CN107591257A CN107591257A CN201710981188.6A CN201710981188A CN107591257A CN 107591257 A CN107591257 A CN 107591257A CN 201710981188 A CN201710981188 A CN 201710981188A CN 107591257 A CN107591257 A CN 107591257A
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Abstract
The invention discloses a kind of silver-based MULTILAYER COMPOSITE contact material and preparation method thereof, including working lining, intermediate layer, weld layer and solder layer, intermediate layer is between working lining, weld layer, there are fine silver or silver solder alloy layer between intermediate layer and working lining, the material of weld layer is cheap metal iron or ferrous alloy, the material in intermediate layer is cheap metal copper or copper alloy, and the material of working lining is one kind in AgMeO systems.The material is prepared using orientation composite rolling, continuous diffusion annealing, cold rolling.Due to Cu and Fe presence in the present invention, silver can be largely saved, significantly reduces cost；The present invention has operating procedure simply controllable; material uniformity is good; the advantages that exploitativeness is strong; suitable for high-volume large-scale production; the silver-based MULTILAYER COMPOSITE contact material of preparation has highly conductive, good bond strength and weldability; contact positioning it is attractive in appearance with it is small to weldment influence of thermal deformation, can be widely applied to temperature controller industry.
Description
Technical field
The invention discloses a kind of silver-based MULTILAYER COMPOSITE contact material and preparation method thereof, more particularly to a kind of multilayer gold
Belong to composited contact material, belong to low-voltage electrical apparatus electrical contact material technical field
Background technology
Silver-base metal oxide (AgMeO) contact material refers to that the metal oxide particle of disperse is distributed in silver matrix
A kind of material, there is excellent electric conductivity, resistance fusion welding, resistance to arc erosion and service life, have in low-voltage electrical apparatus extensive
Application prospect.
In the low-voltage electrical apparatus such as low power relay and switch, the compound riveting of the multiple copper bi-metal of AgMeO, AgM is widely used
Nail and the multiple copper of AgM and its alloy bimetal composite strip contact material.Usual this kind of double metal composite strip thickness is less than whole
The 30% of body thickness, usual its preparation method are large plastometric sets-heat treatment-is rolled down to finished product.High-power friendship is straight generally in
The electrical contact working lining thickness used in the stream controller such as contactor and switch is more than the 30% of integral thickness.Still it is a large amount of at present
Use AgSnO2The contact materials such as system, AgZnO systems, AgCuO systems, AgCdO systems, cost is very high, and silver-colored resource consumption is big.
Section silver is with reducing the primary study content that cost is current electrical contact industry.Therefore, double-deck or multilayer cladding electricity connects
Material is touched because noble metal dosage is few, good combination property, the cheap focus as people's research.In recent years, Germany, Japan
With the research of the country such as Britain all Efforts To Develop complex technique, combination process.The method master of currently manufactured cladding contact material
There are compound cold pressing, Diffusion Welding, explosive welding and roll welding etc..Although above complex technique has been applied to production and had respective
Advantage, but some shortcomings simultaneously inevitably be present, as easily waveform is presented in the combination interface of explosive welding material and influence it
Bond strength, and product size is difficult to control, it is impossible to continuous production.
It is public through retrieval, Chinese Patent Application No. CN200710065631.1, Publication No. CN101034632A, the patent
A kind of Ag base three-layer metal compound electrical contact material has been opened, has been trilaminate material from structure, working lining thickness accounts for overall thickness
The 32% of degree, is unfavorable for the reduction of silver-colored dosage and production cost, and its be in a vacuum furnace using solder by AgMeO (or
AgM) weld together with Cu, be then cold-rolled to finished product thickness, although the flow of preparation technology is succinct, the cost phase prepared
To higher.
The content of the invention
In view of the deficienciess of the prior art, the present invention provides a kind of silver-based MULTILAYER COMPOSITE contact material and its preparation side
Method, can reduce the cost such as silver-colored dosage and material preparation, and the material can be used for the low tension such as low power relay and switch
Device.
According to the first aspect of the invention, there is provided a kind of silver-based MULTILAYER COMPOSITE contact material, including working lining, centre
Layer, weld layer and solder layer, the intermediate layer is between the working lining, the weld layer, the intermediate layer and the work
Make have fine silver or silver solder alloy layer between layer, the material of the weld layer is cheap metal iron or ferrous alloy, the centre
The material of layer is cheap metal copper or copper alloy, and the material of the working lining is one kind in AgMeO systems.
Preferably, the thickness of the weld layer accounts for the 10~30% of composited contact material gross thickness, the thickness in intermediate layer
50~70% are accounted for, the thickness of working lining accounts for 10~30%.
Preferably, the weld layer is designed as plane or bubble point type, and the bubble point type is that surface is provided with projection.
Silver-based MULTILAYER COMPOSITE contact material of the present invention, it is with working lining AgMeO, interlayer Cu and weld layer Fe
The MULTILAYER COMPOSITE AgMeO/Cu/Fe contact materials of the structure in gradient formed.
MULTILAYER COMPOSITE AgMeO/Cu/Fe contact materials of the present invention, wherein the AgMeO is AgSnO2System,
One kind in the series such as AgZnO systems, AgCuO systems and AgCdO systems.
According to the second aspect of the invention, there is provided a kind of preparation method of silver-based MULTILAYER COMPOSITE contact material, including such as
Lower step：
A. AgMeO bands or sheet material are placed at fine silver or silver solder alloy, closed AgMeO and fine silver or silver by rolling
Gold brazing filler metal layer carries out compound, rolling and heat treatment, obtains working lining AgMeO materials；
B. centre is placed between working lining AgMeO and weld layer, Material cladding is formed into MULTILAYER COMPOSITE by rolling
Contact material；
C. MULTILAYER COMPOSITE contact material is heat-treated；
D. the material after heat treatment is rolled, is rolled to thickness required for product.
Above-mentioned steps a, wherein described being complex as is cold compound, it is desirable to which AgMeO and fine silver interface cohesion are fine and close after compound, nothing
Cracking defect.
Above-mentioned steps a, wherein described rolling is hot rolling, will be compound after material carry out 700~900 DEG C of insulations in air
0.5~3h so that different materials interface forms effective diffusion layer, strengthens interface bond strength.
Above-mentioned steps a, wherein described heat treatment is diffusion annealing, temperature is 650~800 DEG C, and the time is 1~5h.Should
Heat treatment can eliminate the residual stress at interface.
Above-mentioned steps a, wherein described fine silver or silver solder alloy thickness degree accounts for the 10~20% of working lining gross thickness.
Above-mentioned steps b, the rolling is cold rolling, and 1~3m/min of mill speed, speed is slower herein, enables to interface
It is firmly combined with.
Above-mentioned steps c, described heat treatment are handled for diffusion annealing；Annealing temperature is 350~500 DEG C, and annealing speed is
0.1~1mm/min, protective atmosphere are argon gas, and argon flow amount is 0.2~1m3/h.The remnants that the heat treatment can eliminate interface should
Power.
Above-mentioned steps d, described rolling are cold rolling, and mill speed is 50~100m/min, speed herein, interface
Be firmly combined with, only thickness need to be rolled it is thin, so speed accelerate.
Above-mentioned steps e, methods described further comprise after step d：
Step f, product is subjected to slitting and blanking, obtains the final products of required specification；
Wherein described slitting is that composite is cut into required width；Described blanking is by the material after slitting
Outside Dimensions of the punching into required product.
Compared with prior art, the invention has the advantages that：
Due to Cu and Fe presence in the present invention, silver can be largely saved, significantly reduces cost.
The present invention is to combine the market demand of AgMeO electrical contact materials and section silver, and bridge joint and gold are used as using cheap metal copper
Belong to iron as weld layer, using techniques such as orientation composite rolling, continuous diffusion annealing, cold rolling, slittings, be prepared for structure in gradient
MULTILAYER COMPOSITE AgMeO/Cu/Fe contact materials.The composite is relatively low with silver, cost is saved, and operating procedure is simple
It is controllable, the advantages that material uniformity is good, and exploitativeness is strong, suitable for high-volume large-scale production, have highly conductive, high-ductility,
The characteristics of good combination intensity and welding performance.
Brief description of the drawings
The detailed description made by reading with reference to the following drawings to non-limiting example, further feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is method flow diagram in the embodiment of the present invention；
Fig. 2 is the main knot of AgMeO bands or sheet material with fine silver or silver solder alloy after compound in the embodiment of the present invention
Structure schematic diagram；
Fig. 3 a, 3b are the AgSnO of structure in gradient in the embodiment of the present invention2/ Cu/Fe MULTILAYER COMPOSITE contact material bands
With bubble point metallograph after blanking；
Fig. 4 is the AgCdO/Cu/Fe MULTILAYER COMPOSITE electrical contact belt metallographs of structure in gradient in the embodiment of the present invention.
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
Embodiment 1
The present embodiment is with AgSnO2Exemplified by/Cu/Fe MULTILAYER COMPOSITE contact materials, specific preparation process is:
(1) AgSnO is obtained by PM technique2Material, and by AgSnO2Material is rolled into certain thickness and obtains one
The AgSnO of set pattern lattice2Sheet material；
(2) AgSnO2 sheet materials are placed at fine silver or silver solder alloy, AgSnO2 and the progress of fine silver solder layer is cold compound
Afterwards；Hot rolling is carried out after 850 DEG C of insulation 3h in atmosphere, fine silver solder layer thickness accounts for the 15% of working lining gross thickness；Then carry out
Diffusion annealing is heat-treated, and annealing temperature is 650 DEG C and annealing time is 5h, obtains working lining AgSnO2Material.
(3) interlayer Cu is placed in working lining AgSnO2Between weld layer Fe, material is rolled into by multilayer by cold rolling
Composited contact material, mill speed 3m/min；
(4) composite is diffused annealing heat-treats；Annealing temperature is 400 DEG C, annealing speed 0.5m/min, is protected
Shield atmosphere is argon gas, argon flow amount 0.4m3/h；
(5) material after annealing is subjected to cold rolling, mill speed 50m/min, is rolled to thickness required for product；
(6) product is subjected to slitting, sanction goes to marginal portion to produce AgSnO2/ Cu/Fe MULTILAYER COMPOSITEs electrical contact belt or plate
Material；The sheet material or band are subjected to blanking, you can the product of specification, such as bubble point needed for obtaining.
Embodiment 2
By taking AgCdO/Cu/Fe MULTILAYER COMPOSITE contact materials as an example, specific preparation process is the present embodiment:
(1) AgCdO materials are obtained by internal oxidition technology, and AgCdO materials is rolled into certain thickness, obtained certain
The AgCdO sheet materials of specification；
(2) AgCdO sheet materials are placed at fine silver or silver solder alloy, by AgCdO and fine silver solder layer carry out it is cold it is compound after；
Hot rolling is carried out after 860 DEG C of insulation 2.5h in atmosphere, fine silver solder layer thickness accounts for the 18% of working lining gross thickness；Then expanded
Annealing heat-treats are dissipated, annealing temperature is 700 DEG C and annealing time is 4h, obtains working lining AgCdO materials.
(3) interlayer Cu is placed between working lining AgCdO and weld layer Fe, material is rolled into multilayer by cold rolling answers
Close contact material, mill speed 2.5m/min；
(4) composite is diffused annealing heat-treats；Annealing temperature is 450 DEG C, annealing speed 0.8m/min, is protected
Shield atmosphere is argon gas, argon flow amount 0.6m3/h；
(5) material after annealing is subjected to cold rolling, mill speed 55m/min, is rolled to thickness required for product；
(6) product is subjected to slitting, sanction goes to marginal portion to produce AgCdO/Cu/Fe MULTILAYER COMPOSITEs electrical contact belt or plate
Material；The sheet material or band are subjected to blanking, you can the product of specification, such as bubble point needed for obtaining.
Embodiment 3
By taking AgCuO/Cu/Fe MULTILAYER COMPOSITE contact materials as an example, specific preparation process is the present embodiment:
(1) AgCuO materials are obtained by melting atomization and internal oxidition technology, and AgCuO materials is rolled into certain thickness
Degree, obtains the AgCuO sheet materials of certain specification；
(2) AgCuO sheet materials are placed at fine silver or silver solder alloy, by AgCuO and fine silver solder layer carry out it is cold it is compound after；
Hot rolling is carried out after 800 DEG C of insulation 3h in atmosphere, fine silver solder layer thickness accounts for the 20% of working lining gross thickness；Then it is diffused
Annealing heat-treats, annealing temperature is 720 DEG C and annealing time is 3h, obtains working lining AgCuO materials.
(3) interlayer Cu is placed between working lining AgCuO and weld layer Fe, material is rolled into multilayer by cold rolling answers
Close contact material, mill speed 3m/min；
(4) composite is diffused annealing heat-treats；Annealing temperature is 430 DEG C, annealing speed 1.1m/min, is protected
Shield atmosphere is argon gas, argon flow amount 0.5m3/h；
(5) material after annealing is subjected to cold rolling, mill speed 58m/min, is rolled to thickness required for product；
(6) product is subjected to slitting, sanction goes to marginal portion to produce AgCuO/Cu/Fe MULTILAYER COMPOSITEs electrical contact belt or plate
Material；The sheet material or band are subjected to blanking, you can the product of specification, such as bubble point needed for obtaining.
Shown in reference picture 2, be AgMeO bands in the embodiment of the present invention or sheet material with fine silver or silver solder alloy it is compound after
Primary structure schematic diagram, wherein 1 is U-shaped fine silver or silver solder alloy, 2 be AgMeO bands or sheet material；In this embodiment
Using U-shaped solder, AgMeO sides can be wrapped up, substantially reduce AgMeO and silver solder compound tense tearing tendency, be strengthened
Both bond strengths；The enhancing of this bond strength be advantageous to further to reduce working lining (AgMeO with silver solder compound after) with
Tearing tendency when intermediate layer and weld layer Rolling compund, strengthen the bond strength of multilayer materials.
Shown in reference picture 3-4, according to above-described embodiment, material of the present invention (Fe or Fe alloys, act as welding including weld layer
Connect), intermediate layer (Cu or Cu alloys, acting as connecting welding layer and working lining), and working lining (AgMeO systems, is contact material
Working portion)；From structure, four layer materials can be divided into, as shown in drawings, working lining AgMeO and interlayer Cu it
Between the pure Ag or Ag solder alloys layer of a thin layer also be present.
In the material that the above embodiment of the present invention obtains, the 17%~22% of integral thickness shared by working lining AgMeO thickness,
Remaining each layer (intermediate layer, weld layer and solder layer) thickness sum accounts for the 78%~83% of integral thickness, working lining thickness accounting
It is lower, silver-colored dosage can be largely saved in batch production with reducing production cost；Further, finished product thickness scope is
1.55mm~7.5mm, it is thicker relative to current material finished product thickness, it can more save silver-colored dosage.
In the material that the above embodiment of the present invention obtains, weld layer Fe not only may be designed as plane, be also designed to steep
Point (Fe layers bossing in such as accompanying drawing 3b) type.Bubble point is advantageous to be issued to better welding effect in identical welding parameter
Fruit, have good weldability, positioning attractive in appearance small with heat affecting to weldment.
The above embodiment of the present invention is standby using compound+heat treatment+cold rolling, is further advantageous to the reduction of cost.
To sum up, composite of the present invention is relatively low with silver, cost is saved, and operating procedure is simply controllable, material uniformity
Well, the advantages that exploitativeness is strong, suitable for high-volume large-scale production, the silver-based MULTILAYER COMPOSITE contact material of preparation has height
Conductive, good bond strength and weldability, contact positioning it is attractive in appearance with it is small to weldment influence of thermal deformation, can be widely applied to temperature
Control device industry.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (10)
- A kind of 1. silver-based MULTILAYER COMPOSITE contact material, it is characterised in that including working lining, intermediate layer, weld layer and solder layer, There are fine silver or silver in the intermediate layer between the working lining, the weld layer between the intermediate layer and the working lining Solder alloy layer, the material of the weld layer is cheap metal iron or ferrous alloy, and the material in the intermediate layer is cheap metal Copper or copper alloy, the material of the working lining are one kind in AgMeO systems.
- A kind of 2. silver-based MULTILAYER COMPOSITE contact material according to claim 1, it is characterised in that the thickness of the weld layer Degree accounts for the 10~30% of composited contact material gross thickness, the thickness in intermediate layer account for composited contact material gross thickness 50~ 70%, the thickness of working lining accounts for the 10~30% of composited contact material gross thickness.
- A kind of 3. silver-based MULTILAYER COMPOSITE contact material according to claim 2, it is characterised in that described fine silver or silver Solder alloy thickness degree accounts for the 10~20% of working lining gross thickness.
- A kind of 4. silver-based MULTILAYER COMPOSITE contact material according to claim any one of 1-3, it is characterised in that have with A kind of lower or various features：- AgMeO the systems include：AgSnO2System, AgZnO systems, AgCuO systems, AgCdO systems；- the weld layer is designed as plane or bubble point type, and the bubble point type is that surface is provided with projection；- the composited contact material, its thickness is 1.55mm~7.5mm.- working lining AgMeO the thickness accounts for the 17%~22% of the overall composited contact material gross thickness, the centre Layer, weld layer, the thickness sum of solder layer account for the 78%~83% of silver-based MULTILAYER COMPOSITE contact material gross thickness.
- A kind of 5. preparation method of the silver-based MULTILAYER COMPOSITE contact material described in any one of claim 1-4, it is characterised in that Comprise the following steps：A. AgMeO bands or sheet material are placed at fine silver or silver solder alloy, by AgMeO and fine silver or silver alloy carry out it is compound, Roll and be thermally treated resulting in working lining AgMeO materials；B. centre is placed between working lining and weld layer, MULTILAYER COMPOSITE contact material is formed by Rolling compund；C. MULTILAYER COMPOSITE contact material is heat-treated；D. the material after heat treatment is rolled, is rolled to thickness required for product.
- A kind of 6. preparation method of silver-based MULTILAYER COMPOSITE contact material according to claim 5, it is characterised in that：It is described Step a, there are following one or more features：- it is described be complex as it is cold compound, it is compound after AgMeO and fine silver or silver alloy interface cohesion it is fine and close, no cracking defect；- described rolling is hot rolling, will be compound after material in atmosphere 700~900 DEG C insulation 0.5~3h；- described heat treatment is diffusion annealing, and wherein temperature is 650~800 DEG C, and the time is 1~5h.
- A kind of 7. preparation method of silver-based MULTILAYER COMPOSITE contact material according to claim 5, it is characterised in that：Step In b, the rolling is cold rolling, wherein 1~3m/min of mill speed.
- A kind of 8. preparation method of silver-based MULTILAYER COMPOSITE contact material according to claim 5, it is characterised in that：Step In c, described heat treatment is handled for diffusion annealing, and wherein annealing temperature is 350~500 DEG C, and annealing speed is 0.5~5m/ Min, protective atmosphere are argon gas, and argon flow amount is 0.2~1m3/h。
- A kind of 9. preparation method of silver-based MULTILAYER COMPOSITE contact material according to claim 3, it is characterised in that：Step In d, described rolling is cold rolling, and wherein mill speed is 50~100m/min.
- 10. a kind of preparation method of silver-based MULTILAYER COMPOSITE contact material according to claim any one of 5-9, its feature It is：Methods described further comprises after step d：Step f, product is subjected to slitting and blanking, obtains the final products of required specification；Wherein described slitting is that composite is cut into required width；Described blanking is by the material punching after slitting Into the Outside Dimensions of required product.
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Cited By (2)
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| CN111719096A (en) * | 2020-06-30 | 2020-09-29 | 东莞市中一合金科技有限公司 | Micro-composite processing technology for silver cadmium oxide alloy material |
| CN112223888A (en) * | 2020-10-15 | 2021-01-15 | 温州宏丰电工合金股份有限公司 | Gradient composite material and preparation method thereof |
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| CN112223888A (en) * | 2020-10-15 | 2021-01-15 | 温州宏丰电工合金股份有限公司 | Gradient composite material and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN107591257B (en) | 2020-11-10 |
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