CN106449190A - Layered silver-copper brazing three-composite electrical contact material and preparation method thereof - Google Patents
Layered silver-copper brazing three-composite electrical contact material and preparation method thereof Download PDFInfo
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- CN106449190A CN106449190A CN201610488039.1A CN201610488039A CN106449190A CN 106449190 A CN106449190 A CN 106449190A CN 201610488039 A CN201610488039 A CN 201610488039A CN 106449190 A CN106449190 A CN 106449190A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
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- 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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
- B22F7/04—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
- H01H11/048—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by powder-metallurgical processes
Abstract
The invention discloses a layered silver-copper brazing three-composite electrical contact material and a preparation method thereof. The three-composite electrical contact material is obtained by preparing silver alloy powder, copper alloy powder and a brazing material, then preparing strips from the silver alloy powder, the copper alloy powder and the brazing material and combining the strips. An electrical contact material which is low in material cost and excellent in integral electrical property and is silver-saving and environmental-friendly is provided to substitute a traditional copper alloy contact material, a silver alloy contact material and a silver-copper alloy contact material.
Description
Technical field
The present invention relates to a kind of alloy material, more particularly to a kind of stratiform silver-bearing copper pricker three-layer composite electric contact material
And preparation method thereof.
Background technology
Relay, catalyst, the core parts of chopper are electrical contact (point), and it carries connects the heavy of breaking current
Task, the quality of contact elements depends on the performance of electrical contact (point) material and scientific and effective combination, and it is security appliance
Important guarantee.
At present, on market, the maximum contact material of usage amount is silver alloy and copper alloy two big class.Copper alloy contact material
Certain applications are on chopper and high-voltage switch gear, although copper alloy contact material is cheap, copper alloy electric contact antioxidation
Poor performance, the time arriving commercialization after installation is different in size, and when electrical equipment is shelved time length, uses, electrical contact surface can form oxidation
Film, in addition when using, disjunction can discharge substantial amounts of heat, will also result in surface and be subject to thermal oxide to generate oxide-film, so that contact resistance is increased
Big impact electric conductivity and heat conductivity, make the temperature rise of electrical equipment increase；Increasing of switch temperature rise, understands all components and parts in acceleration switch
Lost efficacy, shortened its electric life.Therefore vicious cycle occurs, so that electrical equipment is crossed heat-induced damage and contact melted occurs lead to safe thing
Therefore.
Existing silver alloy contact material be widely used in relay, catalyst, on chopper.Wherein, silver-colored tungsten and silver-colored carbonization
Tungsten graphite is used in the typical material on chopper.
In addition general miniature circuit breaker uses Agcdo or silver-colored graphite alloy (as AgC4) contact material etc..But it contains
Silver amount is all very high, and the silver content of silver cadmium oxide contact material is all more than 85%, and is the main flow product in current contact material market
Product, annual consumption silver amount is quite huge.But silver resource is very limited of today, with the increase of consumption, will lead to silver
Rapid rise of price, so that the cost producing electrical contact material remains high, Business Economic Benefit declines, and social benefit is also greatly cut
Subtract.And another metallic element cadmium environmental pollution of such product is larger, does not meet the development trend of nowadays environmental protection.Therefore,
Appliance manufacturers to ensure quality on the premise of it is desirable to alloy industry using base metal replace noble silver to lower product become
This cry more and more higher.For this reason, we need to seek a kind of energy composite copper alloy contact and silver alloy contact premium properties, and
The cost of material is low, Universal electric function admirable section silver, environmental protection electrical contact material come to substitute traditional copper alloy contact, silver close
Golden contact and yellow gold contact material.
Content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of the cost of material is low, Universal electric
What energy was excellent saves silver-colored, environmental protection electrical contact material to substitute traditional copper alloy contact, silver alloy contact and yellow gold contact
Material.
For achieving the above object, the invention provides following technical scheme：
A kind of stratiform silver-bearing copper pricker three-layer composite electric contact material, includes successively
Ag alloy layer：Silver content is 70～99.9% by percentage to the quality；
Copper alloy layer：Copper content is 80～99.9% by percentage to the quality；
Solder layer：Silver-bearing copper phosphorus brazing alloy, silver-bearing copper spelter solder or amorphous brazing filler metal；
As a further improvement on the present invention,
Described ag alloy layer includes following percetage by weight composition：
Silver 80～99.9%；
Silver layer additive 0.1～20%：
At least one of metal, metal-oxide, nonmetallic, nonmetallic compound：0.04～10.3%,
Diadust 0.05～4%,
Rare earth element total amount 0.01～5.7%；
Described copper alloy layer includes following percetage by weight composition：
Copper 80～99.9%；
Layers of copper additive 0.1～20%：
At least one of metal, metal-oxide, nonmetallic, nonmetallic compound：0.04～10.3%,
Diadust 0.05～4%,
Rare earth element total amount 0.01～5.7%.
As a further improvement on the present invention,
Described silver layer additive is：Including diadust, graphite, boron, aluminum, silicon, phosphorus, titanium, vanadium, chromium, manganese, ferrum, cobalt,
Nickel, copper, zinc, zirconium, niobium, molybdenum, indium, stannum, antimony, tellurium, hafnium, tantalum, tungsten, rhenium, bismuth, scandium, yttrium, lanthanum, cerium, neodymium, ytterbium, lutecium and corresponding
At least one of nonmetallic compound or metal-oxide；
Described layers of copper additive is：Including diadust, graphite, boron, aluminum, silicon, phosphorus, titanium, vanadium, chromium, manganese, ferrum, cobalt,
Nickel, copper, zinc, zirconium, niobium, molybdenum, indium, stannum, antimony, tellurium, hafnium, tantalum, tungsten, rhenium, bismuth, scandium, yttrium, lanthanum, cerium, neodymium, ytterbium, lutecium and corresponding
At least one of nonmetallic compound or metal-oxide.
As a further improvement on the present invention,
Described solder layer includes following percetage by weight composition：Silver 0.1～15%, nickel 0.1～18%, stannum 0.1～20%,
Phosphorus 0.1～10%, zinc 0.1～50%, balance of copper.
As a further improvement on the present invention,
Metal-oxide in described silver layer additive and layers of copper additive be SnO2, ZnO, CuO, Fe2O3, CdO,
One or more of In2O3, Bi2O3, Al2O3, MoO3, ZrO2 oxide, in described silver layer additive and layers of copper additive
Rare earth element be one or more of scandium, yttrium, lanthanum, cerium, neodymium, ytterbium, lutecium combine.
A kind of preparation method of stratiform silver-bearing copper pricker three-layer composite electric contact material：
Step 1：By the required component ratio preparing material, prepare silver alloy powder and copper alloy powder；
Step 2：Respectively silver alloy powder, copper alloy powder and solder are prepared into the band of required thickness；
Step 3：Ag alloy layer band, copper alloy layer band, solder band are sequentially overlapped and carry out hot being combined together；
Step 4：Band after compound for the heat is prepared into three layers of composite contact through techniques such as cold rolling, punching；
Described solder is silver-bearing copper phosphorus brazing alloy, silver-bearing copper spelter solder or amorphous brazing filler metal.
As a further improvement on the present invention,
Described step 1 includes：
Step 1-1：The preparation of silver metal alloyed powder, according to weight percent ratio, by silver 80～99.9% and additive
0.1～20% is mixed, and prepares silver alloy powder.
Silver layer additive 0.1～20%：
At least one of metal, metal-oxide, nonmetallic, nonmetallic compound：0.04～10.3%,
Diadust 0.05～4%, rare earth element total amount 0.01～5.7%.
Step 1-2：The preparation of copper metal alloyed powder, according to weight percent ratio, by copper 80～99.9% and additive
0.1～20% is mixed, and prepares copper alloy powder.
Layers of copper additive 0.1～20%：
At least one of metal, metal-oxide, nonmetallic, nonmetallic compound：0.04～10.3%, diadust
0.05～4%,
Rare earth element total amount 0.01～5.7%.
Described step 2, silver alloy powder, copper alloy powder are closed through powder briquetting, sintering, extruding, the cold rolling silver that obtains
Gold ribbon material, copper alloy band, by solder through extruding, cold rolling obtain solder band, described powder briquetting, just base typed pressure be
90～450Mpa, controls density for the 75～88% of solid density, described extrusion temperature is at 700～900 DEG C；
Described step 3, at 500～900 DEG C, hot rolling speed is 0.1～10 m/min to combined temp；
Described step 4, the band being combined be cold rolled to needed for thickness, its every time roll lower amount and be less than 20%.Make
For further improvement of the present invention,
In described step 1-1, silver layer additive is：Including diadust, graphite, boron, aluminum, silicon, phosphorus, titanium, vanadium, chromium,
Manganese, ferrum, cobalt, nickel, copper, zinc, zirconium, niobium, molybdenum, indium, stannum, antimony, tellurium, hafnium, tantalum, tungsten, rhenium, bismuth, scandium, yttrium, lanthanum, cerium, neodymium, ytterbium, lutecium with
And at least one of corresponding nonmetallic compound or metal-oxide；
In described step 1-2, layers of copper additive is：Including diadust, graphite, boron, aluminum, silicon, phosphorus, titanium, vanadium, chromium,
Manganese, ferrum, cobalt, nickel, copper, zinc, zirconium, niobium, molybdenum, indium, stannum, antimony, tellurium, hafnium, tantalum, tungsten, rhenium, bismuth, scandium, yttrium, lanthanum, cerium, neodymium, ytterbium, lutecium with
And at least one of corresponding nonmetallic compound or metal-oxide.
As a further improvement on the present invention,
Metal-oxide in described silver layer additive and layers of copper additive be SnO2, ZnO, CuO, Fe2O3, CdO,
One or more of In2O3, Bi2O3, Al2O3, MoO3, ZrO2 oxide, in described silver layer additive and layers of copper additive
Rare earth element be one or more of scandium, yttrium, lanthanum, cerium, neodymium, ytterbium, lutecium combine.
As a further improvement on the present invention,
In described step 2, sintering temperature is 850～950 DEG C, and sintering time is 2～5 hours, is cooled to after oversintering
Come out of the stove for less than 50 degrees Celsius.
Beneficial effects of the present invention,
1. add diadust and nikel powder in ag alloy layer and copper alloy layer, account for total amount 0.5～40%, Yi Jishi
Ink, boron, aluminum, silicon, phosphorus, titanium, vanadium, chromium, manganese, ferrum, cobalt, zinc, zirconium, niobium, molybdenum, silver, indium, stannum, antimony, tellurium, tantalum, tungsten, rhenium, bismuth, scandium,
One or more of metal, nonmetallic, metal-oxide or nonmetallic compound in yttrium, lanthanum, cerium, neodymium, ytterbium, lutecium, to material
Organizational structure be optimized, improve the resistance fusion welding of material and resistance to electrical arc erosion.
2. employ 3-layer composite material, improve the non-oxidizability of Cu alloy material, reduce the contact resistance of material,
Improve the conductivity of material, reduce the temperature rise of device for switching.
3. adopt 3-layer composite material, its ag alloy layer and the copper of the addition additive of aximal deformation value hot composition process preparation
It is firmly combined between alloy-layer, copper alloy layer and solder layer, and improves the combination property of product because of complex effect, improve
The service life of device for switching.Due to employing three layers of combination process, the silver-colored effect of section substantially, measure as 70% about, enters one by section silver
Step reduces the cost of electrical contact material.
4., because inventive formulation and technique etc. are reasonable in design, the electrical contact material of production has conductivity height, contact electricity
Resistance is low, and even tissue is fine and close, and bond strength is high, and good in oxidation resistance has the spy such as excellent resistance fusion welding and resistance to electrical arc erosion
Point.
Specific embodiment
Embodiment one：
Atomized powder prepares silver alloy/three layers of copper alloy/solder composite electric contact material
Step 1. powder by atomization：Including preparing silver metal alloyed powder and copper metal alloyed powder.
When preparing silver metal alloy powder or copper metal alloy powder, silver or copper in add aluminum, titanium, vanadium, chromium, manganese, ferrum,
Cobalt, nickel, copper, zinc, zirconium, indium, stannum, antimony, tellurium, in one or two and above metal, or scandium, yttrium, lanthanum, cerium, neodymium, ytterbium, lutecium of bismuth
One or two and above rare earth alloy, carry out high melt, smelting temperature is 1030～1450 DEG C, treats its abundant alloying
Make it be atomized into silver metal alloy powder or copper metal alloy powder with water under high pressure afterwards, then dry and cross 50～500 mesh sieves, its
In raw materials used be by mass percentage：The content of silver or copper is (80～99.9) %, ratio containing other materials (0.1～
20) %.
Step 1-1 prepares silver metal alloyed powder
When preparing silver metal alloy powder, silver and added metallic element and rare earth element carry out high melt, melt
Refining temperature is 1030～1400 DEG C, makes it be atomized into silver alloy powder with water under high pressure after alloying, then dries and crosses 200 mesh
Sieve, wherein raw materials used be by mass percentage：Silver 98.5%, rare-earth yttrium cerium alloy 0.3%, indium 1% and nickel 0.2%.
Step 1-2 prepares copper metal alloyed powder
During preparation copper metal alloy powder, copper and added metallic element and rare earth element carry out high melt, melt
Refining temperature is 1030～1400 DEG C, makes it be atomized into copper alloy powder with water under high pressure after alloying, then dries and crosses 200 mesh
Sieve, wherein raw materials used be by mass percentage：Copper (80～99.5) %, Rare Earth Lanthanum, yttrium, cerium alloy 0.6%, bismuth
0.15% and nickel 0.2%.
Fired for silver metal alloyed powder oxidation processes are obtained siluer metal oxide powder by step 2., and oxidizing temperature is 600
DEG C, oxygen pressure is 3Mpa, and the time is 10 hours.
Step 3., by the silver metal alloy powder of upper step 2 gained, adds graphite, nickel, carborundum, yttrium, oxidation wherein
Lanthanum and diadust, by silver metal alloy 88%, nickel 10%, diamond 1%, lanthana 0.2%, other 0.5%, mixed
Uniformly mix in sphere of powder grinding machine, the mixed powder time is 8 hours, ratio of grinding media to material is 20: 1.
The mixture that step 3 obtains is carried out molding by step 4., sintering obtains ingot blank.Its isostatic pressed just base typed pressure
180Mpa, controls density for the 75～90% of solid density, after just base loads sintering furnace, evacuation is filled with noble gases and is protected
Shield, sintering temperature is 900 DEG C, and the time is 3 hours, then cools to less than 50 DEG C with the furnace and comes out of the stove.
Step 5., by above-mentioned obtained ingot blank, is pressed again, extrudes and is rolled.Ingot blank is carried out, after multiple pressure, being squeezed into band, so
Carry out the ag alloy layer electrical contact material containing additive or metal-oxide for the rolling acquisition afterwards more standby.Extrusion temperature is 880 DEG C,
Extrusion ratio is 100.
Step 6. is identical by above-mentioned steps 2,3,4,5 step, prepares copper alloy layer band, containing diadust 1%, lanthanum
Yttrium cerium 0.9%, bismuth 0.15%, nickel 0.2%, amount of copper is surplus.
Step 7. solder layer adopts silver-bearing copper spelter solder, and manufacturing process adopts smelting process.By extruding, rolling and lehr attendant
Skill, is prepared into band standby.
Step 8., respectively will be dry for the composite surface polishing of material by the silver alloy containing additive, copper alloy and solder band
Only, by it separately or concurrently it is combined on hot equipment complex, its combined temp is 830 DEG C, speed is 4 ms/min then.
Band after heat is combined well by step 9. is prepared into section silver, three layers of composite contact of environment-friendly type through cold rolling, punching etc..?
In the course of processing, need to be protected using protective gas during band insulation annealing, temperature is 600 DEG C, the time is 2 hours, cold rolling
When per pass amount of rolling be less than 20%.
Embodiment two：
Coated composite powder prepares silver alloy/three layers of copper alloy/solder composite electric contact material
Step 1. alloy silver powder adopts cladding process to obtain, and its method is by a certain proportion of silver nitrate, pours into equipped with interpolation
The metal, nonmetallic, nonmetallic compound or metal-oxide of the requirement according to claim 1 or 2 one or more
Element or material, or add rare-earth copper alloy, diadust, zirconium, yttrium, the vessel of one or more elements of disprosium alloy
In, add ammonia, adjust pH value 9.5, after stirring, add a certain amount of hydrazine hydrate, so that silver nitrate is precipitated completely, will sink
Form sediment and filter, clean up and dry.
Step 2. copper alloy powder adopt powder mixing machine prepare, its method be by copper powder 97.6%, diadust 1.5%,
Tungsten powder 0.2%, lanthana powder 0.5%, nikel powder 0.2% carries out mixed powder, mixed powder mix homogeneously in ball mill, and the mixed powder time 8 is little
When, ratio of grinding media to material 20: 1, obtain copper alloy powder.
By silver alloy powder and copper alloy powder, fired process obtains metal, nonmetallic or metal-oxide to step 3.
Powder, sintering temperature is 700 DEG C, and the time is 3 hours.
Step 4. is by step 2,3 mixture obtaining carry out molding, sintering obtains ingot blank.Just base typed pressure is isostatic pressed
180Mpa, controls density for the 90% of solid density, after just base loads sintering furnace, evacuation is filled with noble gases and is protected, and burns
Junction temperature is 930 DEG C, and the time is 3 hours, then cools to less than 60 DEG C with the furnace and comes out of the stove.
Above-mentioned obtained ingot blank is carried out multiple pressure, extruding and rolling by step 5..Ingot blank is carried out, after multiple pressure, being squeezed into band
Material, then carries out the silver alloy band containing addition element or metal-oxide for the rolling acquisition standby again.Extrusion temperature is 900 DEG C,
Extrusion ratio is 100.
Step 6. is identical by above-mentioned steps 5, and the copper alloy band preparing is standby.
Step 7. solder layer adopts silver-bearing copper phosphorus solder, and manufacturing process adopts smelting process, by extruding and rolling mill practice, preparation
Become band standby.
Step 8. by the silver alloy containing addition element or metal-oxide, copper alloy and welding material, respectively by material
Composite surface polishing and pickling is clean, then it separately or concurrently be combined on hot equipment complex, its combined temp is 850
DEG C, speed is 4 ms/min.
By heat, the band after compound is prepared into section silver, three layers of composite contact of environment-friendly type through techniques such as cold rolling, punching to step 9..
In process, strand-anneal(ing) need to be protected using protective gas, and temperature is 650 DEG C, and the time is 2 hours, every when cold rolling
Secondary amount of rolling is less than 20%.
Embodiment three：
Sheathed extrusion prepares silver alloy/three layers of copper alloy/solder composite electric contact material
Step 1. is got the raw materials ready
Step 1-1 prepares silver metal alloyed powder
When preparing silver metal alloy powder, silver and added metallic element and rare earth element carry out high melt, melt
Refining temperature is 1030～1400 DEG C, makes solution temperature when 1100 ± 30 DEG C after alloying, makes it be atomized into silver conjunction with water under high pressure
Bronze end, then dries and crosses 200 mesh sieves, wherein raw materials used be by mass percentage：Silver 99%, cerium 0.3%, yttrium
0.5%th, nickel 0.2%.
Step 1-2, prepares copper metal alloyed powder
During preparation copper metal alloy powder, copper and added metallic element and rare earth element carry out high melt, melt
Refining temperature is 1030～1400 DEG C, makes solution temperature when 1150 ± 30 DEG C after alloying, makes it be atomized into copper with water under high pressure and closes
Bronze end, then dries and crosses 200 mesh sieves, wherein raw materials used be by mass percentage：Copper 98.9%, Rare Earth Lanthanum, yttrium, cerium
Alloy 0.8%, bismuth 0.1%, nickel 0.2%.
Step 1-3, solder：Using silver, copper-phosphorus alloy, as raw material and copper, formula prepares solder in proportion, by (with quality hundred
Divide than meter)：Silver 5%, phosphorus 7%, copper surplus, carry out melting, ingot casting.
Step 2. alloyed powder ball milling
Step 2-1, will add nickel, diadust, yittrium oxide, oxidation in the silver metal alloy powder of upper step 1 gained
Lanthanum, graphite, carborundum, by silver metal alloy 88%, nickel 10%, diadust 1%, lanthanum, yttrium 0.5%, other 0.5%,
Uniformly mix in mixed sphere of powder grinding machine, the mixed powder time is 8 hours, ratio of grinding media to material is 20: 1.
Step 2-2, will add nickel, diadust, carborundum in the copper metal alloy powder of upper step 1 gained,
By copper metal alloy 97%, nickel 1%, diadust 1%, carborundum 1%, uniformly mix in mixed sphere of powder grinding machine
Close, the mixed powder time is 8 hours, ratio of grinding media to material is 20: 1.
Step 3. isostatic pressed
By the alloyed powder in step 2 in rubber package set, by the ag alloy layer thickness requirement of product, make dividing plate in proportion,
By the silver metal preparing alloy powder and copper alloy powder, pour the two ends of rubber package set dividing plate respectively into, the silver being poured into
Alloy powder and copper alloy powder tamping, are slowly withdrawn jacket internal partition, lock jacket lid, put in isostatic pressed squeeze cylinder,
It is squeezed into ingot.Just base typed pressure is 180Mpa to isostatic pressed, controls density for the 90% of solid density, after just base loads sintering furnace
Evacuation is filled with noble gases and is protected, and sintering temperature is 930 DEG C, and the time is 3 hours, then cools to 60 DEG C with the furnace and goes out
Stove.
Step 4. extrusion rolling
Ingot blank obtained by step 3 is carried out multiple pressure, extruding and rolling by step 4-1.Ingot blank is carried out, after multiple pressure, being squeezed into plate
Material, then carries out silver alloy/copper alloy material strip containing additive for the rolling acquisition standby again.Extrusion temperature is 900 DEG C, and extrusion ratio is
100.
Solder ingot in step 1 is carried out being squeezed into sheet material by step 4-2, then is prepared into pricker by techniques such as cold rolling, annealing
Material strip.
Step 5. heat is compound
The composite surface of silver alloy/copper alloy material strip material and solder band is polished clean, then will be enterprising for its hot equipment complex
Row is compound, and its combined temp is 850 DEG C, and speed is 4 ms/min.
Step 6. rolls punching press
By the 3-layer composite material being combined, it is rolled down to required thickness, then punching becomes product.In process, carry
The annealing of material need to be protected using protective atmosphere, and temperature is 650 DEG C, and the time is 2 hours, and when cold rolling, per pass amount of rolling is less than
20%.
Example IV：
Difference with embodiment one is：
Step 3：By the silver metal alloy powder of upper step 2 gained, add graphite, nickel, carborundum, yttrium, oxidation wherein
Lanthanum and diadust, by silver metal alloy 92%, nickel 3.7%, diamond 1.8%, lanthana 1.5%, yttrium 0.2%, oxidation
Scandium 0.5%, ZrO2：0.1%, bismuth oxide 0.2%, uniformly mix in mixed sphere of powder grinding machine, the mixed powder time is 8 hours, ratio of grinding media to material
For 20: 1.
Step 6. is identical by above-mentioned steps 2,3,4,5 step, prepares copper alloy layer band, final content is：Copper：
88%, nickel 4.7%, diamond 1.8%, lanthana 0.5%, yttrium 0.5%, cerium oxide 0.6%, Scia 0.5%, ZrO2：
1%, ferrum 0.5%, bismuth oxide 1%, lanthanum yttrium cerium alloy 0.9%.
Embodiment five
Difference with embodiment one is：
Step 3：By the silver metal alloy powder of upper step 2 gained, add graphite, nickel, carborundum, yttrium, oxidation wherein
Lanthanum and diadust, by silver metal alloy 96%, nickel 0.5%, diamond 1.5%, lanthana 2%, in mixed sphere of powder grinding machine
Uniformly mix, the mixed powder time is 8 hours, ratio of grinding media to material is 20: 1.
Step 6. is identical by above-mentioned steps 2,3,4,5 step, prepares copper alloy layer band, final content is：Copper：
90%, nickel 2%, vanadium 1%, ferrum 1%, manganese 0.5%, zinc oxide 1%, titanium dioxide 1%, diamond 0.5%, lanthana 1.5%,
Lanthanum yttrium cerium alloy 0.9%, scandium 0.1%, other 1%.
Using the 3-layer composite material containing additive of present invention preparation, its main performance is as follows：
1. density：≥8.3g/cm3；
2. hardness (HB) >=70；
3. resistivity：≤2.15μΩ.cm；
4. metallograph：Additive is uniformly distributed in matrix in point-like.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned enforcement
Example, all technical schemes belonging under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of stratiform silver-bearing copper pricker three-layer composite electric contact material it is characterised in that：Include successively
Ag alloy layer：Silver content is 70～99.9% by percentage to the quality；
Copper alloy layer：Copper content is 80～99.9% by percentage to the quality；
Solder layer：Silver-bearing copper phosphorus brazing alloy, silver-bearing copper spelter solder or amorphous brazing filler metal.
2. a kind of stratiform silver-bearing copper pricker three-layer composite electric contact material according to claim 1 it is characterised in that：
Described ag alloy layer includes following percetage by weight composition：
Silver 80～99.9%；
Silver layer additive：
At least one of metal, metal-oxide, nonmetallic, nonmetallic compound：0.04～10.3%,
Diadust 0.05～4%,
Rare earth element total amount 0.01～5.7%；
Described copper alloy layer includes following percetage by weight composition：
Copper 80～99.9%；
Layers of copper additive：
At least one of metal, metal-oxide, nonmetallic, nonmetallic compound：0.04～10.3%,
Diadust 0.05～4%,
Rare earth element total amount 0.01～5.7%.
3. a kind of stratiform silver-bearing copper pricker three-layer composite electric contact material according to claim 2 it is characterised in that：Described silver layer adds
Plus thing is：Including diadust, graphite, boron, aluminum, silicon, phosphorus, titanium, vanadium, chromium, manganese, ferrum, cobalt, nickel, copper, zinc, zirconium, niobium, molybdenum,
Indium, stannum, antimony, tellurium, hafnium, tantalum, tungsten, rhenium, bismuth, scandium, yttrium, lanthanum, cerium, neodymium, ytterbium, lutecium and corresponding nonmetallic compound or metal
At least one of oxide；
Described layers of copper additive is：Including diadust, graphite, boron, aluminum, silicon, phosphorus, titanium, vanadium, chromium, manganese, ferrum, cobalt, nickel, copper,
Zinc, zirconium, niobium, molybdenum, indium, stannum, antimony, tellurium, hafnium, tantalum, tungsten, rhenium, bismuth, scandium, yttrium, lanthanum, cerium, neodymium, ytterbium, lutecium and corresponding nonmetallic
At least one of compound or metal-oxide.
4. a kind of stratiform silver-bearing copper pricker three-layer composite electric contact material according to claim 3 it is characterised in that：Described solder layer
Including following percetage by weight composition：Silver 0.1～15%, nickel 0.1～18%, stannum 0.1～20%, phosphorus 0.1～10%, zinc 0.1
～50%, balance of copper.
5. a kind of stratiform silver-bearing copper pricker three-layer composite electric contact material according to claim 4 it is characterised in that：Described silver layer adds
Plus the metal-oxide in thing and layers of copper additive be SnO2, ZnO, CuO, Fe2O3, CdO, In2O3, Bi2O3, Al2O3,
One or more of MoO3, ZrO2 oxide, in described silver layer additive and layers of copper additive rare earth element be scandium,
One or more of yttrium, lanthanum, cerium, neodymium, ytterbium, lutecium combine.
6. a kind of preparation method of stratiform silver-bearing copper pricker three-layer composite electric contact material it is characterised in that：
Step 1：By the required component ratio preparing material, prepare silver alloy powder and copper alloy powder；
Step 2：Respectively silver alloy powder, copper alloy powder and solder are prepared into the band of required thickness；
Step 3：Ag alloy layer band, copper alloy layer band, solder band are sequentially overlapped and carry out hot being combined together；
Step 4：Band after compound for the heat is prepared into three layers of composite contact through techniques such as cold rolling, punching；
Described solder is silver-bearing copper phosphorus brazing alloy, silver-bearing copper spelter solder or amorphous brazing filler metal.
7. the preparation method of a kind of stratiform silver-bearing copper pricker three-layer composite electric contact material according to claim 6：It is characterized in that：
Described step 1 includes：
Step 1-1：The preparation of silver metal alloyed powder, according to weight percent ratio, silver 80～99.9% and additive 0.1～
20% is mixed, and prepares silver alloy powder.
Additive includes following components：
At least one of metal, metal-oxide, nonmetallic, nonmetallic compound：0.04～10.3%,
Diadust 0.05～4%,
Rare earth element total amount 0.01～5.7%.
Step 1-2：The preparation of copper metal alloyed powder, according to weight percent ratio, copper 80～99.9% and additive 0.1～
20% is mixed, and prepares copper alloy powder.
Additive includes following components：
At least one of metal, metal-oxide, nonmetallic, nonmetallic compound：0.04～10.3%,
Diadust 0.05～4%,
Rare earth element total amount 0.01～5.7%.
Described step 2, by silver alloy powder, copper alloy powder through powder briquetting, sintering, extruding, cold rolling obtain silver alloy band
Material, copper alloy band, by solder through extruding, cold rolling obtain solder band, described powder briquetting, just base typed pressure be 90～
450Mpa, controls density for the 75～88% of solid density, described extrusion temperature is at 700～900 DEG C；
Described step 3, at 500～900 DEG C, hot rolling speed is 0.1～10 m/min to combined temp；
Described step 4, the band being combined be cold rolled to needed for thickness, its every time roll lower amount and be less than 20%.
8. the preparation method of a kind of stratiform silver-bearing copper pricker three-layer composite electric contact material according to claim 6 or 7, its feature exists
In：
In described step 1-1, silver layer additive is：Including diadust, graphite, boron, aluminum, silicon, phosphorus, titanium, vanadium, chromium, manganese, ferrum,
Cobalt, nickel, copper, zinc, zirconium, niobium, molybdenum, indium, stannum, antimony, tellurium, hafnium, tantalum, tungsten, rhenium, bismuth, scandium, yttrium, lanthanum, cerium, neodymium, ytterbium, lutecium and relatively
At least one of the nonmetallic compound answered or metal-oxide；
In described step 1-2, layers of copper additive is：Including diadust, graphite, boron, aluminum, silicon, phosphorus, titanium, vanadium, chromium, manganese, ferrum,
Cobalt, nickel, copper, zinc, zirconium, niobium, molybdenum, indium, stannum, antimony, tellurium, hafnium, tantalum, tungsten, rhenium, bismuth, scandium, yttrium, lanthanum, cerium, neodymium, ytterbium, lutecium and relatively
At least one of the nonmetallic compound answered or metal-oxide.
9. a kind of stratiform silver-bearing copper pricker three-layer composite electric contact material according to claim 8 preparation method it is characterised in that：
Metal-oxide in described silver layer additive and layers of copper additive be SnO2, ZnO, CuO, Fe2O3, CdO, In2O3,
One or more of Bi2O3, Al2O3, MoO3, ZrO2 oxide, in described silver layer additive and layers of copper additive dilute
Earth elements are that one or more of scandium, yttrium, lanthanum, cerium, neodymium, ytterbium, lutecium combine.
10. the preparation method of a kind of stratiform silver-bearing copper pricker three-layer composite electric contact material according to claim 6 or 7 or 9：It is special
Levy and be：In described step 2, sintering temperature is 850～950 DEG C, and sintering time is 2～5 hours, is cooled to 50 after oversintering
Come out of the stove below degree Celsius.
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