CN109735737A - A kind of new A g-Ni electrical contact material and preparation method thereof - Google Patents
A kind of new A g-Ni electrical contact material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of new A g-Ni electrical contact materials, including Ag, Ni and TiB2；Each constituent element mass percent are as follows: Ni:5~40%, TiB2: 0.3~5%, surplus Ag, new A g-Ni electrical contact material prepared by the present invention have high rigidity, resistance fusion welding good and arc ablation resistance, high comprehensive performance.
Description
Technical field
The invention belongs to powder metallurgy silver-based electric contact material technical fields, and in particular to a kind of new A g-Ni electrical contact
Material and preparation method thereof.
Background technique
Ag-Ni contact material has excellent a conduction and heating conduction, while its contact resistance is smaller and very
Stablize, furthermore the material also has good plastic deformation ability, various parts is easily processed into, so Ag-Ni slider material
It is widely used in the products such as various microswitches, breaker, relay.Although Ag-Ni slider material has above many excellent
Point, but it is very easy to generate melting welding, is easy to happen material transfer under the erosion of electric arc to make its service life significantly
It reduces, therefore the application of Ag-Ni contact material receives very big limitation.
Summary of the invention
It is novel that technical problem to be solved by the invention is to provide a kind of hardness is high, contact resistance is low, resistance fusion welding is good
Ag-Ni electrical contact material.
In order to solve the above technical problems, the technical scheme is that
A kind of new A g-Ni electrical contact material, including Ag, Ni and TiB2；Each constituent element mass percent are as follows: Ni:5~
40%, TiB2: 0.3~5%, surplus Ag.
It further include the TiC of mass percent 0.1~2%, TiB as improvement to above-mentioned technical proposal2With the total matter of TiC
Measuring percentage is 0.3~5%.
Each constituent element powder size≤2 μm as a preferred technical solution,.
The present invention also provides a kind of methods for preparing new A g-Ni electrical contact material, comprising steps of
1) compound seperated preparation
In the AgNO of 0.25~1.0mol/L3The Na of 0.25~1.0mol/L is added in aqueous solution2CO3Aqueous solution is settled out
The Ag of good dispersion, granularity at 0.5~2 μm2CO3Powder is repeatedly washed, adds deionized water and 20~40min of ultrasound, is made
Suspending liquid A；Ni and TiB are weighed by 5~40%:0.3~5%2, add deionized water and 20~40min of ultrasound, suspension B be made；
B suspension is poured into A container and stirs 30~60min；Dehydration of alcohol, it is dry；Through 300 DEG C~350 DEG C calcinings 1 in hydrogen point
~3h, grinding, obtains the Ag-Ni-TiB that constituent element is evenly distributed2Composite granule；
2) just molded
It by the above-mentioned Ag-Ni-TiB2 composite granule prepared, is press-formed through 200~300MPa, protects 80~100s of lotus；
3) first sintering
First molded base is sintered at 800~900 DEG C, keeps the temperature 2h, furnace cooling；
4) multiple pressure
First sintering briquette ingot is subjected to multiple pressure under 350~450MPa pressure, protects 80~100s of lotus；
5) resintering
Multiple green compact ingot keeps the temperature 2h, furnace cooling in 800~850 DEG C of resinterings；
6) secondary multiple pressure: boost in pressure to 700~900MPa protects 80~100s of lotus；
7) secondary resintering: temperature is set as 700~750 DEG C, keeps the temperature 2h, and furnace cooling is touched to get the new A g-Ni electricity
Head material.
Stirring rate is 300~800 revs/min in the step 1) as a preferred technical solution,.
Drying temperature is 100~150 DEG C in the step 1) as a preferred technical solution,.
As improvement to above-mentioned technical proposal, the Ni and TiB of ultrasonic disperse in the step 1) distilled water2, TiC point
Suspension B is made in 20~45min of body；B suspension is poured into A container and stirs 30~60min and is made what constituent element was evenly distributed
Ag2CO3-Ni-TiB2+ TiC composite granule.
As a preferred technical solution, by Ag made from the step 1)2CO3-Ni-TiB2+ TiC it is compound it is seperated through 100~
Simultaneously the Ag-Ni-TiB being evenly distributed is made in 300~350 DEG C of calcinings in 150 DEG C of drying2+ TiC composite granule.
Ni granularity is 0.1~2 μm in the step 1) as a preferred technical solution,.
TiB in the step 1) as a preferred technical solution,2Granularity is 0.1~2 μm.
Compared with the prior art, the present invention has the following advantages:
1, the present invention is reduced with the Ag2CO3 (6.08g/cm3) of low-density instead of highdensity Ag (10.5g/cm3)
Matrix and reinforced phase Ni, TiB2 (4.52g/cm3) density contrast, ingredient caused by avoiding powder mixing machine technique due to high density difference
It is unevenly distributed, to effectively improve material property.
2, additive of the invention is highly conductive, high rigidity, dystectic TiB2, TiC particle, can be obviously improved Ag-Ni
The resistance fusion welding of contact and arc resistant ablation, to improve its service life.
By adopting the above-described technical solution, a kind of new A g-Ni electrical contact material, including Ag, Ni and TiB2；Each group
First mass percent are as follows: Ni:5~40%, TiB2: 0.3~5%, surplus Ag, new A g-Ni electrical contact prepared by the present invention
Material has high rigidity, resistance fusion welding good and arc ablation resistance, high comprehensive performance.
Specific embodiment
A kind of new A g-Ni electrical contact material, including Ag, Ni and TiB2；Each constituent element mass percent are as follows: Ni:5~
40%, TiB2: 0.3~5%, surplus Ag.
It further include the TiC of mass percent 0.1~0.2%, TiB2It is 0.3~5% with TiC gross mass percentage.
Each constituent element powder size≤2 μm.
A method of new A g-Ni electrical contact material is prepared, comprising steps of
1) compound seperated preparation
In the AgNO of 0.25~1.0mol/L3The Na of 0.25~1.0mol/L is added in aqueous solution2CO3Aqueous solution is settled out
The Ag of good dispersion, granularity at 0.5~2 μm2CO3Powder is repeatedly washed, adds deionized water and 20~40min of ultrasound, is made
Suspending liquid A；Ni and TiB are weighed by 5~40%:0.3~5%2, add deionized water and 20~40min of ultrasound, suspension B be made；
B suspension is poured into A container and stirs 30~60min；Dehydration of alcohol, it is dry；Through 300 DEG C~350 DEG C calcinings 1 in hydrogen point
~3h, grinding, obtains the Ag-Ni-TiB that constituent element is evenly distributed2Composite granule；
2) just molded
It by the above-mentioned Ag-Ni-TiB2 composite granule prepared, is press-formed through 200~300MPa, protects 80~100s of lotus；
3) first sintering
First molded base is sintered at 800~900 DEG C, keeps the temperature 2h, furnace cooling；
4) multiple pressure
First sintering briquette ingot is subjected to multiple pressure under 350~450MPa pressure, protects 80~100s of lotus；
5) resintering
Multiple green compact ingot keeps the temperature 2h, furnace cooling in 800~850 DEG C of resinterings；
6) secondary multiple pressure: boost in pressure to 700~900MPa protects 80~100s of lotus；
7) secondary resintering: temperature is set as 700~750 DEG C, keeps the temperature 2h, and furnace cooling is touched to get the new A g-Ni electricity
Head material.
Stirring rate is 300~800 revs/min in the step 1).
Drying temperature is 100~150 DEG C in the step 1).
The Ni and TiB of ultrasonic disperse in the step 1) distilled water2, 20~45min of TiC fission be made suspension B；By B
Suspension, which pours into A container and stirs 30~60min, is made the Ag that constituent element is evenly distributed2CO3-Ni- TiB2+ TiC composite granule.
By Ag made from the step 1)2CO3-Ni-TiB2+ TiC it is compound it is seperated through 100~150 DEG C of drying and 300~
The Ag-Ni-TiB being evenly distributed is made in 350 DEG C of calcinings2+ TiC composite granule.
Ni granularity is 0.5~2 μm in the step 1).
TiB in the step 1)2Granularity is 0.5~2 μm.
Below with reference to embodiment, the present invention is further explained.In the following detailed description, it is only retouched by way of explanation
Certain exemplary embodiments of the invention are stated.Undoubtedly, those skilled in the art will recognize, without departing from
In the case where the spirit and scope of the present invention, the described embodiments may be modified in various different ways.Therefore,
Description is regarded as illustrative in nature, and is not intended to limit the scope of the claims.
Embodiment 1
Weigh 43 grams of silver nitrate, 3.41 grams of PVP be made into 340ml solution, prepare Na2CO3Precipitating reagent aqueous solution instills above-mentioned
In solution, Ag is made2CO3Precipitating is seperated and is repeatedly washed, and adds deionized water, suspending liquid A is made in ultrasonic 30min；Weigh Ni
Powder (0.5~2 μm) 3, TiB2(0.15 gram of (0.5~2 μm), adds deionized water to powder, and suspension B is made in ultrasonic 40min；B is hanged
Supernatant liquid pours into A container and stirs (800 revs/min) 30min, dehydration of alcohol, dry, grinding.Most ground afterwards through 350 DEG C of calcining 3h
Mill, obtains Ag-Ni-TiB2Composite granule.Through first pressing, just burning, multiple pressure, resintering, secondary multiple pressure, secondary resintering, contact is made
Material piece, density reaches 98% or more after rolling deformation, and hardness 110HV, arc erosion voltage is increased to 800V from 600V.
Comparative example
Ag-Ni contact finished product is prepared under the same conditions with mature coprecipitation technology.Weigh 28.96 grams of silver nitrate,
Ni3.74 grams, 3.41 grams of PVP is made into 340ml solution, instills in above-mentioned solution with precipitant solution, is repeatedly washed, and alcohol is de-
Water, dry, grinding.Most afterwards through 550 DEG C of calcining 3h, grinding obtains Ag-Ni composite granule.Through first pressing, just burn, it is multiple pressure, multiple
It burns, secondary multiple pressure, secondary resintering, removing oxide layer, finished product are removed in polishing.
Embodiment 2
Weigh 43 grams of silver nitrate, 3.41 grams of PVP be made into 340ml solution, instilled in above-mentioned solution with precipitant solution, warp
Repeatedly washing, adds deionized water, suspending liquid A is made in 20~40min of ultrasound；Weigh 3 grams of Ni powder (0.5~2 μm), TiB2Powder
0.3 gram of (0.5~2 μm), adds deionized water, and suspension B is made in ultrasonic 40min；B suspension is being poured into A container and stirred
(500 revs/min) 45min, dehydration of alcohol are dry.Most afterwards through 350 DEG C of calcining 3h, grinding obtains Ag-ZnO-TiB2Composite powder
Body.Through first pressing, just burning, multiple pressure, resintering, secondary multiple pressure, secondary resintering, then rolling is the contact material of different-thickness.Density
Reach 98% or more, 1000V can be improved in hardness 120, arc erosion voltage.
Embodiment 3
Weigh 43 grams of silver nitrate, 3.41 grams of PVP be made into 340ml solution, instilled in above-mentioned solution with precipitant solution, warp
Repeatedly washing, adds deionized water, suspending liquid A is made in ultrasonic 40min；Weigh 3 grams of Ni powder (0.5~2 μm), TiB2Powder (0.5~
2 μm) 0.4 gram, 0.1 gram of TiC powder (0.5~2 μm), add deionized water, suspension B is made in ultrasonic 40min；B suspension is being fallen
Enter A container stirring (600 revs/min) 40min, dehydration of alcohol is dry.Most afterwards through 350 DEG C of calcining 3h, grinding obtains Ag-Ni-
TiB2- TiC composite granule.Through first pressing, just burning, multiple pressure, resintering, secondary multiple pressure, secondary resintering, finished product is then rolled.Firmly
115HV is spent, density reaches 98%.
One embodiment performance comparison of subordinate list
By above-mentioned simple preparation process, the new A g-Ni-TiB of function admirable can be prepared2+ TiC electrical contact
Material.
Embodiment 4
A method of new A g-Ni electrical contact material is prepared, comprising steps of
1) compound seperated preparation
In the AgNO of 0.25mol/L3The Na of 0.25mol/L is added in aqueous solution2CO3Aqueous solution is settled out good dispersion, grain
Spend the Ag at 0.5 μm2CO3Powder is repeatedly washed, adds deionized water and ultrasound 20min, suspending liquid A is made；By 5%:0.5%
Weigh Ni and TiB2, add deionized water and ultrasound 20min, suspension B be made；B suspension is poured into A container and stirs 30min；
Dehydration of alcohol, it is dry；Through 300 DEG C of DEG C of 1~3h of calcining in hydrogen point, grinding obtains the Ag-Ni- that constituent element is evenly distributed
TiB2Composite granule；
2) just molded
It by the above-mentioned Ag-Ni-TiB2 composite granule prepared, is press-formed through 200MPa, protects 80~100s of lotus；
3) first sintering
First molded base is sintered at 800 DEG C, keeps the temperature 2h, furnace cooling；
4) multiple pressure
First sintering briquette ingot is subjected to multiple pressure under 350MPa pressure, protects lotus 80s；
5) resintering
Multiple green compact ingot keeps the temperature 2h, furnace cooling in 800 DEG C of resinterings；
6) secondary multiple pressure: boost in pressure to 700MPa protects lotus 80s；
7) secondary resintering: temperature is set as 700 DEG C, keeps the temperature 2h, furnace cooling is to get the new A g-Ni electrical contact material
Material.
Stirring rate is 300 revs/min in the step 1).
Drying temperature is 100 DEG C in the step 1).
The Ni and TiB of ultrasonic disperse in the step 1) distilled water2, TiC fission 20min be made suspension B；B is suspended
Liquid, which pours into A container and stirs 30min, is made the Ag that constituent element is evenly distributed2CO3-Ni- TiB2+ TiC composite granule.
By Ag made from the step 1)2CO3-Ni-TiB2+ TiC is compound seperated through 100 DEG C of drying and in 300 DEG C of calcinings
The Ag-Ni-TiB being evenly distributed is made2+ TiC composite granule.
Ni granularity is 0.5 μm in the step 1).
TiB in the step 1)2Granularity is 0.5 μm.
Embodiment 5
A method of new A g-Ni electrical contact material is prepared, comprising steps of
1) compound seperated preparation
In the AgNO of 0.5mol/L3The Na of 0.5mol/L is added in aqueous solution2CO3Aqueous solution is settled out good dispersion, granularity
In 1 μm of Ag2CO3Powder is repeatedly washed, adds deionized water and ultrasound 30min, suspending liquid A is made；It is weighed by 20%:1%
Ni and TiB2, add deionized water and ultrasound 30min, suspension B be made；B suspension is poured into A container and stirs 40min；Alcohol
Dehydration, it is dry；Through 320 DEG C of 1~3h of calcining in hydrogen point, grinding obtains the Ag-Ni-TiB that constituent element is evenly distributed2It is compound
Powder；
2) just molded
It by the above-mentioned Ag-Ni-TiB2 composite granule prepared, is press-formed through 250MPa, protects lotus 90s；
3) first sintering
First molded base is sintered at 850 DEG C, keeps the temperature 2h, furnace cooling；
4) multiple pressure
First sintering briquette ingot is subjected to multiple pressure under 400MPa pressure, protects lotus 90s；
5) resintering
Multiple green compact ingot keeps the temperature 2h, furnace cooling in 820 DEG C of resinterings；
6) secondary multiple pressure: boost in pressure to 800MPa protects lotus 90s；
7) secondary resintering: temperature is set as 720 DEG C, keeps the temperature 2h, furnace cooling is to get the new A g-Ni electrical contact material
Material.
Stirring rate is 500 revs/min in the step 1).
Drying temperature is 120 DEG C in the step 1).
The Ni and TiB of ultrasonic disperse in the step 1) distilled water2, TiC fission 35min be made suspension B；B is suspended
Liquid, which pours into A container and stirs 50min, is made the Ag that constituent element is evenly distributed2CO3-Ni- TiB2+ TiC composite granule.
By Ag made from the step 1)2CO3-Ni-TiB2+ TiC is compound seperated through 120 DEG C of drying and in 330 DEG C of calcinings
The Ag-Ni-TiB being evenly distributed is made2+ TiC composite granule.
Ni granularity is 1 μm in the step 1).
TiB in the step 1)2Granularity is 1 μm.
Embodiment 6
A method of new A g-Ni electrical contact material is prepared, comprising steps of
1) compound seperated preparation
In the AgNO of 1.0mol/L3The Na of 1.0mol/L is added in aqueous solution2CO3Aqueous solution is settled out good dispersion, granularity
In 2 μm of Ag2CO3Powder is repeatedly washed, adds deionized water and ultrasound 40min, suspending liquid A is made；It is weighed by 40%:2%
Ni and TiB2, add deionized water and ultrasound 40min, suspension B be made；B suspension is poured into A container and stirs 60min；Alcohol
Dehydration, it is dry；Through 350 DEG C of 1~3h of calcining in hydrogen point, grinding obtains the Ag-Ni-TiB that constituent element is evenly distributed2It is compound
Powder；
2) just molded
It by the above-mentioned Ag-Ni-TiB2 composite granule prepared, is press-formed through 300MPa, protects lotus 100s；
3) first sintering
First molded base is sintered at 900 DEG C, keeps the temperature 2h, furnace cooling；
4) multiple pressure
First sintering briquette ingot is subjected to multiple pressure under 450MPa pressure, protects lotus 100s；
5) resintering
Multiple green compact ingot keeps the temperature 2h, furnace cooling in 850 DEG C of resinterings；
6) secondary multiple pressure: boost in pressure to 900MPa protects lotus 100s；
7) secondary resintering: temperature is set as 750 DEG C, keeps the temperature 2h, furnace cooling is to get the new A g-Ni electrical contact material
Material.
Stirring rate is 800 revs/min in the step 1).
Drying temperature is 150 DEG C in the step 1).
The Ni and TiB of ultrasonic disperse in the step 1) distilled water2, TiC fission 45min be made suspension B；B is suspended
Liquid, which pours into A container and stirs 60min, is made the Ag that constituent element is evenly distributed2CO3-Ni- TiB2+ TiC composite granule.
By Ag made from the step 1)2CO3-Ni-TiB2+ TiC is compound seperated through 50 DEG C of drying and at 300~350 DEG C
The Ag-Ni-TiB being evenly distributed is made in calcining2+ TiC composite granule.
Ni granularity is 2 μm in the step 1).
TiB in the step 1)2Granularity is 2 μm.
The above shows and describes the basic principle, main features and advantages of the invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (8)
1. a kind of new A g-Ni electrical contact material, it is characterised in that: including Ag, Ni and TiB2；Each constituent element mass percent are as follows:
Ni:5~40%, TiB2: 0.3~5%, surplus Ag.
2. a kind of new A g-Ni electrical contact material as described in claim 1, it is characterised in that: further include mass percent 0.1
~2% TiC, TiB2It is 0.3~5% with TiC gross mass percentage.
3. a kind of new A g-Ni electrical contact material as claimed in claim 1 or 2, it is characterised in that: each constituent element powder grain
≤ 2 μm of degree.
4. a kind of method for preparing new A g-Ni electrical contact material as claimed in claim 1,2 or 3, which is characterized in that including
Step:
1) compound seperated preparation
In the AgNO of 0.25~1.0mol/L3The Na of 0.25~1.0mol/L is added in aqueous solution2CO3Aqueous solution is settled out dispersion
Ag of the good, granularity of property at 0.5~2 μm2CO3Powder is repeatedly washed, adds deionized water and 20~40min of ultrasound, suspension is made
Liquid A；Ni and TiB are weighed by 5~40%:0.3~5%2, add deionized water and 20~40min of ultrasound, suspension B be made；By B
Suspension pours into A container and stirs 30~60min；Dehydration of alcohol, it is dry；In hydrogen point through 300 DEG C~350 DEG C calcinings 1~
3h, grinding, obtains the Ag-Ni-TiB that constituent element is evenly distributed2Composite granule；
2) just molded
It by the above-mentioned Ag-Ni-TiB2 composite granule prepared, is press-formed through 200~300MPa, protects 80~100s of lotus；
3) first sintering
First molded base is sintered at 800~900 DEG C, keeps the temperature 2h, furnace cooling；
4) multiple pressure
First sintering briquette ingot is subjected to multiple pressure under 350~450MPa pressure, protects 80~100s of lotus；
5) resintering
Multiple green compact ingot keeps the temperature 2h, furnace cooling in 800~850 DEG C of resinterings；
6) secondary multiple pressure: boost in pressure to 700~900MPa protects 80~100s of lotus；
7) secondary resintering: temperature is set as 700~750 DEG C, keeps the temperature 2h, furnace cooling is to get the new A g-Ni electrical contact material
Material.
5. the method for preparation new A g-Ni electrical contact material as claimed in claim 4, it is characterised in that: in the step 1)
Stirring rate is 300~800 revs/min.
6. the method for preparation new A g-Ni electrical contact material as claimed in claim 4, it is characterised in that: in the step 1)
Drying temperature is 100~150 DEG C.
7. the method for preparation new A g-Ni electrical contact material as claimed in claim 4, it is characterised in that: the step 1) is steamed
The Ni and TiB of ultrasonic disperse in distilled water2, 20~45min of TiC fission be made suspension B；B suspension is poured into A container and stirred
It mixes 30~60min and the Ag that constituent element is evenly distributed is made2CO3-Ni-TiB2+ TiC composite granule.
8. the method for preparation new A g-Ni electrical contact material as claimed in claim 7, it is characterised in that: by the step 1)
Ag obtained2CO3-Ni-TiB2The compound fission of+TiC calcines obtained be evenly distributed through 100~150 DEG C of drying and at 300~350 DEG C
Ag-Ni-TiB2+ TiC composite granule.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112501464A (en) * | 2020-11-18 | 2021-03-16 | 中国科学院金属研究所 | Silver-nickel composite material and preparation method thereof |
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| JPS59159950A (en) * | 1983-03-03 | 1984-09-10 | Tanaka Kikinzoku Kogyo Kk | Electrical contact material |
| JPS6033327A (en) * | 1983-07-31 | 1985-02-20 | Matsushita Electric Works Ltd | Electric contact material |
| JPS61288033A (en) * | 1985-06-15 | 1986-12-18 | Matsushita Electric Works Ltd | Electrical contact point material |
| JPH03236443A (en) * | 1990-02-13 | 1991-10-22 | Akira Shibata | Sintered contact material for breaking current |
| CN108179297A (en) * | 2018-01-20 | 2018-06-19 | 云南大学 | A kind of new A g-ZnO electrical contact materials and preparation method thereof |
| CN108251683A (en) * | 2018-03-27 | 2018-07-06 | 西安理工大学 | A kind of silver based contact material and preparation method with high resistance fusion welding energy |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59159950A (en) * | 1983-03-03 | 1984-09-10 | Tanaka Kikinzoku Kogyo Kk | Electrical contact material |
| JPS6033327A (en) * | 1983-07-31 | 1985-02-20 | Matsushita Electric Works Ltd | Electric contact material |
| JPS61288033A (en) * | 1985-06-15 | 1986-12-18 | Matsushita Electric Works Ltd | Electrical contact point material |
| JPH03236443A (en) * | 1990-02-13 | 1991-10-22 | Akira Shibata | Sintered contact material for breaking current |
| CN108179297A (en) * | 2018-01-20 | 2018-06-19 | 云南大学 | A kind of new A g-ZnO electrical contact materials and preparation method thereof |
| CN108251683A (en) * | 2018-03-27 | 2018-07-06 | 西安理工大学 | A kind of silver based contact material and preparation method with high resistance fusion welding energy |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112501464A (en) * | 2020-11-18 | 2021-03-16 | 中国科学院金属研究所 | Silver-nickel composite material and preparation method thereof |
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Application publication date: 20190510 |