CN102430755B - Process for manufacturing sliver-nickel composite silver-nickel-copper electrical contact - Google Patents
Process for manufacturing sliver-nickel composite silver-nickel-copper electrical contact Download PDFInfo
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- CN102430755B CN102430755B CN 201110454840 CN201110454840A CN102430755B CN 102430755 B CN102430755 B CN 102430755B CN 201110454840 CN201110454840 CN 201110454840 CN 201110454840 A CN201110454840 A CN 201110454840A CN 102430755 B CN102430755 B CN 102430755B
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Abstract
The invention relates to a process for manufacturing a sliver-nickel composite silver-nickel-copper electrical contact. The process comprises the following steps of: mixing powders, manufacturing uniformly mixed AgNi coated powder by a chemical co-deposition method after taking the right amount of Ag sheets and Ni sheets; additionally mixing Ag powder, Ni powder and Cu powder to form AgNiCu alloy powder; and sintering, pelletizing, carrying out primary pressing, sintering, carrying out secondary pressing and the like. According to the sliver-nickel composite silver-nickel-copper electrical contact manufactured by the process disclosed by the invention, the AgNi alloy powder is produced by a chemical coating method during machining so that the powder is mixed uniformly and no agglomeration exists; a composite layer is further added, and an AgNiCu alloy layer with lower silver content takes the place of an AgNi alloy layer with higher silver content, thus the silver usage is saved; and in addition, the AgNiCu alloy layer still has excellent flowability without using phosphorus elements during welding, the welding effect is good, and the welding process is more environmentally-friendly.
Description
Technical field:
The present invention relates to a kind of processing technology of making electrical contact, the electrical contact processing technology of the multiple silver nickel copper of especially a kind of silver-colored nickel.
Background technology:
Electrical contact is the core parts of electric switch, and these products are mainly used in the high and low pressure device for switching.Usually adopt welding manner to realize that electrical contact is connected with contact plate, tactile the effective of bridge.The quality of welding quality is to there being very important direct relation in make-break capacity, electrical arc erosion and service life of the temperature rise of the reliability of operation of electrical appliances, electrical equipment, contact.
Make at present electrical contact member and be first mechanical mixture by Ag, Ni powder-shaping-sintering-densification process, make the contact of monolithic, weld with copper spare again.In the AgNi alloyed powder, the content of silver generally accounts for weight ratio about 70%, so that silver content is higher, cost is higher.The AgNi alloyed powder of existing electrical contact adopts powder mixing machine in addition, mixes evenly not, and easily particle agglomeration lumps, and especially distributing homogeneity is bad between Ag powder and the Ni powder, can not satisfy the requirement of product, affects the performance of electrical contact.
Summary of the invention:
The problem to be solved in the present invention is to improve the problem that the electrical contact silver content is too high in the background technology, alloyed powder mixes inequality.
For achieving the above object, the invention provides the production technology of the multiple silver nickel copper electrical contact of a kind of silver-colored nickel, manufacture craft is as follows successively:
(1) mixed powder is got an amount of Ag piece and Ni piece, utilizes the chemical codeposition method to make uniform AgNi cladding powder; In addition Ag powder, Ni powder, Cu powder are mixed, form AgNiCu mixing powder;
(2) sintering and granulation are placed on respectively sintering under the oxygen-free environment to AgNi cladding powder and AgNiCu mixing powder, then the AgNi alloy-coated powder behind the sintering and the AgNiCu alloy powder that sinters piece into are placed on respectively granulation in the granulator;
(3) first pressing will sinter granular AgNi alloy-coated powder and AgNiCu alloyed powder into and be paved into two-layerly up and down, be pressed with mould according to product needed.
(4) sintering, at the beginning of pressing formation press embryo to put into sintering furnace, under oxygen-free environment, carry out sintering.
(5) the multiple pressure is pressed with mould according to product needed.
In the described step 1, the shared weight ratio of the Ni powder in the AgNi coated composite powder is 30 ± 5%, and surplus is the Ag powder.
In the described step (1), Ag powder purity: Ag% 〉=99.5, Ni powder purity: Ni% 〉=99.5, Ag, Ni alloyed powder apparent density are 1.5 g/cm
2-3.0g/cm
2
In the described step (1), Ag powder purity: Ag% 〉=99.5, Cu powder purity: Cu% 〉=99.5, Ni powder purity: Ni% 〉=99.5, the apparent density of AgNiCu alloyed powder are 3.0g/cm
2Above.
The weight ratio of described AgNi clad alloy powder and AgNiCu alloyed powder is 1:1 to 1:5.
In the described step (1), it is 3 hours that described Ag, Ni, Cu powder are packed into mixed in the mixed powder machine of V-type.
In the described step (2), the AgNi coated composite powder is 650 ± 20 ℃ in furnace temperature, under the condition of hydrogen as protective gas, and sintering 1 hour.
In the described step (2), AgNiCu mixing powder is 650 ± 20 ℃ in furnace temperature, under the condition of hydrogen as protective gas, and sintering 1 hour.
In the described step (2), the AgNi alloy-coated powder behind the sintering is made the particle that particle diameter is 0.4mm-0.6mm; The AgNiCu alloyed powder that mixes is made the particle that particle diameter is 0.4mm-0.6mm.
Sintering in the described step (4), 820 ± 20 ℃ of furnace temperature are incubated 2 hours, and with hydrogen as protective gas.
The multiple silver nickel copper electrical contact of silver-colored nickel of the present invention, the AgNi alloyed powder adopts the Chemical coating method explained hereafter in process, so that powder mixes, the caking of can not reuniting is in addition by having increased multiple layer, the higher AgNi alloy-layer of silver content that replaces part with the lower AgNiCu alloy-layer of silver content, saved silver-colored consumption, and the AgNiCu alloy-layer has preferably weldability, do not use P elements still to have during the welding of AgNiCu alloy-layer mobile preferably, welding effect is good, comparatively environmental protection.
The specific embodiment:
Embodiment one:
Mixed powder is got Ag sheet 70g, Ni sheet 30g, and Ag sheet purity is that 99.9%, Ni sheet purity is 99.5%; Utilize the chemical codeposition method to make mixed uniformly AgNi coated composite powder, drying, apparent density 1.8g/cm
2, form the altogether AgNi coated composite powder of 100g;
Get in addition Ag powder 11g, Ni powder 25 g, Cu powder 64 g mix, and Ag powder purity is 99.6%, apparent density 3.0 g/cm
2, copper powder purity is that 99.6%, Ni powder purity is 99.7%.Form the altogether AgNiCu mixed-powder of 100g, Ag, Ni, Cu powder are packed into mixed 3 hours in the mixed powder machine of V-type.
AgNi coated composite powder and AgNiCu mixed powder that drying is good are respectively charged in the graphite boat, are 650 ± 10 ℃ in furnace temperature, use under the condition of hydrogen as protective gas sintering 1.5 hours.
Then the AgNi alloy-coated powder that sinters piece into is placed on granulation in the granulator, makes the particle that particle diameter is 0.4mm; The AgNiCu alloyed powder, be placed on granulation in the granulator in addition, make the particle that particle diameter is 0.4mm.
First pressing is paved into AgNi alloy-coated powder, the AgNiCu alloy of granulation shape two-layer up and down, and its position does not up and down limit, can be the AgNiCu alloy upper, also can be AgNi alloy-coated powder upper, also be the same in following examples.Use again mould compressing; According to product weight, press the embryo height, the requirement of compressive load per unit area is suppressed.
Sintering, at the beginning of the pressure embryo of pressing formation pack in the graphite boat, put into sintering furnace, sintering under oxygen-free environment, the sintering furnace temperature is 840 ± 10 ℃, is incubated 2 hours, and with hydrogen as protective gas.
The multiple pressure is pressed with mould according to product needed.When pressing again, product size after pressure testing after the first inspection of density is qualified, can be pressed in batches again.
The multiple silver nickel copper electrical contact of the silver-colored nickel that the present embodiment makes, saved silver-colored consumption, resistivity is 2.7 μ Ω .cm after testing, substantially there is not before difference with improvement, electric conductivity is not affected, and the ratio of brazing area between the multiple layer is higher, use the ultrasonic imaging nondestructive detection system to detect, ratio of brazing area reaches 97%, has preferably bond strength between the multiple layer, when the AgNiCu alloy-layer of the present embodiment welds in addition, need not to use P elements, have preferably flowability, welding performance is better, in conjunction with firm, comparatively environmental protection.
Embodiment two:
Mixed powder is got Ag sheet 65g, Ni sheet 35g mixes, and Ag sheet purity is that 99.9%, Ni sheet purity is 99.5%; Utilize the chemical codeposition method to make mixed uniformly AgNi coated composite powder, drying, apparent density 1.8g/cm
2, form the altogether AgNi cladding powder of 100g;
Get in addition Ag powder 39g, Ni powder 84 g, Cu powder 177 g mix, and Ag powder purity is 99.8%, apparent density 3.5 g/cm
2, copper powder purity is that 99.7%, Ni powder purity is 99.6%.Form the altogether AgNiCu powder of 300g, the AgNiCu powder is packed into mixed 3 hours in the mixed powder machine of V-type.
AgNi coated composite powder and AgNiCu mixed powder that drying is good are respectively charged in the graphite boat, are 650 ± 10 ℃ in furnace temperature, use under the condition of hydrogen as protective gas sintering 1.5 hours.
Then the AgNi alloy-coated powder that sinters piece into is placed on granulation in the granulator, makes the particle that particle diameter is 0.4mm; The AgNiCu alloyed powder, be placed on granulation in the granulator in addition, make the particle that particle diameter is 0.4mm.
First pressing is paved into AgNi alloy-coated powder, the AgNiCu alloy of granulation shape two-layer up and down, and its position does not up and down limit, can be the AgNiCu alloy upper, also can be AgNi alloy-coated powder upper, also be the same in following examples.Use again mould compressing; According to product weight, press the embryo height, the requirement of compressive load per unit area is suppressed.
Sintering, at the beginning of the pressure embryo of pressing formation pack in the graphite boat, put into sintering furnace, sintering under oxygen-free environment, during sintering, furnace temperature is 820 ± 10 ℃, is incubated 2 hours, and with hydrogen as protective gas.
The multiple pressure is pressed with mould according to product needed.When pressing again, product size after pressure testing after the first inspection of density is qualified, can be pressed in batches again.
The multiple silver nickel copper electrical contact of the silver-colored nickel that the present embodiment makes, saved silver-colored consumption, resistivity is 2.6 μ Ω .cm after testing, substantially there is not before difference with improvement, electric conductivity is not affected, and the ratio of brazing area between the multiple layer is higher, use the ultrasonic imaging nondestructive detection system to detect, ratio of brazing area reaches 96%, has preferably bond strength, when the AgNiCu alloy-layer of the present embodiment welds in addition, need not to use P elements, have preferably flowability, welding performance is better, in conjunction with firm, comparatively environmental protection.
Embodiment three:
Mixed powder is got Ag sheet 75g, Ni sheet 25g mixes, and Ag sheet purity is that 99.9%, Ni sheet purity is 99.5%; Utilize the chemical codeposition method to make mixed uniformly AgNi coated composite powder, drying, apparent density 1.8g/cm
2, form the altogether AgNi cladding powder of 100g;
Get in addition Ag powder 18g, Ni powder 44 g, Cu powder 138g mix, and Ag powder purity is 99.6%, apparent density 3.8 g/cm
2, copper powder purity is that 99.7%, Ni powder purity is 99.7%.Form altogether Ag, Ni, the Cu alloy powder of 200g, the AgNiCu powder is packed into mixed 3 hours in the mixed powder machine of V-type.
AgNi coated composite powder and AgNiCu mixed powder that drying is good are respectively charged in the graphite boat, are 630 ± 10 ℃ in furnace temperature, use under the condition of hydrogen as protective gas sintering 1.5 hours.
Then the AgNi alloy-coated powder that sinters piece into is placed on granulation in the granulator, makes the particle that particle diameter is 0.6mm; The AgNiCu alloyed powder, be placed on granulation in the granulator in addition, make the particle that particle diameter is 0.6mm.
First pressing is paved into AgNi alloy-coated powder, the AgNiCu alloy of granulation shape two-layer up and down, and its position does not up and down limit, can be the AgNiCu alloy upper, also can be AgNi alloy-coated powder upper, also be the same in following examples.Use again mould compressing; According to product weight, press the embryo height, the requirement of compressive load per unit area is suppressed.
Sintering, at the beginning of the pressure embryo of pressing formation pack in the graphite boat, put into sintering furnace, sintering under oxygen-free environment, during sintering, furnace temperature is 800 ± 10 ℃, is incubated 2 hours, and with hydrogen as protective gas.
The multiple pressure is pressed with mould according to product needed.When pressing again, product size after pressure testing after the first inspection of density is qualified, can be pressed in batches again.
The multiple silver nickel copper electrical contact of the silver-colored nickel that the present embodiment makes, saved silver-colored consumption, resistivity is 2.9 μ Ω .cm after testing, substantially there is not before difference with improvement, electric conductivity is not affected, and the ratio of brazing area between the multiple layer is higher, use the ultrasonic imaging nondestructive detection system to detect, ratio of brazing area reaches 98%, has preferably bond strength, when the AgNiCu alloy-layer of the present embodiment welds in addition, need not to use P elements, have preferably flowability, welding performance is better, in conjunction with firm, comparatively environmental protection.
Embodiment four:
Mixed powder is got Ag sheet 68g, Ni sheet 32g mixes, and Ag sheet purity is that 99.9%, Ni sheet purity is 99.5%; Utilize the chemical codeposition method to make mixed uniformly AgNi coated composite powder, drying, apparent density 3.0g/cm
2, form the altogether AgNi cladding powder of 100g;
Get in addition Ag powder 24g, Ni powder 48g, Cu powder 128g mix, and Ag powder purity is 99.8%, apparent density 4.2 g/cm
2, copper powder purity is that 99.9%, Ni powder purity is 99.6%.Form the altogether AgNiCu powder of 200g, the AgNiCu powder is packed into mixed 3 hours in the mixed powder machine of V-type.
AgNi coated composite powder and AgNiCu mixed powder that drying is good are respectively charged in the graphite boat, are 640 ± 10 ℃ in furnace temperature, use under the condition of hydrogen as protective gas sintering 1.5 hours.
Then the AgNi alloy-coated powder that sinters piece into is placed on granulation in the granulator, makes the particle that particle diameter is 0.45mm; The AgNiCu alloyed powder, be placed on granulation in the granulator in addition, make the particle that particle diameter is 0.45mm.
First pressing is paved into AgNi alloy-coated powder, the AgNiCu alloy of granulation shape two-layer up and down, and its position does not up and down limit, can be the AgNiCu alloy upper, also can be AgNi alloy-coated powder upper, also be the same in following examples.Use again mould compressing; According to product weight, press the embryo height, the requirement of compressive load per unit area is suppressed.
Sintering, at the beginning of the pressure embryo of pressing formation pack in the graphite boat, put into sintering furnace, sintering under oxygen-free environment, during sintering, furnace temperature is 810 ℃, is incubated 2 hours, and with hydrogen as protective gas.
The multiple pressure is pressed with mould according to product needed.When pressing again, product size after pressure testing after the first inspection of density is qualified, can be pressed in batches again.
The multiple silver nickel copper electrical contact of the silver-colored nickel that the present embodiment makes, saved silver-colored consumption, resistivity is 2.8 μ Ω .cm after testing, substantially there is not before difference with improvement, electric conductivity is not affected, and the ratio of brazing area between the multiple layer is higher, use the ultrasonic imaging nondestructive detection system to detect, ratio of brazing area reaches 97%, has preferably bond strength, when the AgNiCu alloy-layer of the present embodiment welds in addition, need not to use P elements, have preferably flowability, welding performance is better, in conjunction with firm, comparatively environmental protection.
The invention is not restricted to above embodiment.
Claims (10)
1. the production technology of the multiple silver nickel copper electrical contact of a silver-colored nickel, it is characterized in that manufacture craft is as follows successively: (1) mixes powder, gets an amount of Ag sheet and Ni sheet, utilizes the chemical codeposition method to make mixed uniformly AgNi cladding powder; In addition Ag powder, Ni powder, Cu powder are mixed, form AgNiCu mixing powder; (2) sintering and granulation are respectively charged in the graphite boat sintering under oxygen-free environment to AgNi cladding powder and AgNiCu mixed-powder, then the AgNi clad alloy powder and the AgNiCu mixed powder that sinter into behind the piece are placed on respectively granulation in the granulator; (3) first pressing will sinter granular AgNi cladding powder, AgNiCu mixed powder into and be paved into two-layerly up and down, be pressed with mould according to product needed; (4) sintering, at the beginning of pressing formation press embryo to put into sintering furnace, under oxygen-free environment, carry out sintering; (5) the multiple pressure is pressed with mould according to product needed.
2. silver-colored nickel according to claim 1 is answered the production technology of silver nickel copper electrical contact, and it is characterized in that: in the described step 1, the shared weight ratio of the Ni powder in the AgNi cladding powder is 30 ± 5%, and surplus is the Ag powder.
3. silver-colored nickel according to claim 1 is answered the production technology of silver nickel copper electrical contact, and it is characterized in that: in the described step 1, the component content ratio of described Ag powder, Ni powder, Cu powder is as follows, Ag powder 11 ± 2%, and Ni powder 25 ± 3%, surplus is the Cu powder.
4. silver-colored nickel according to claim 1 is answered the production technology of silver nickel copper electrical contact, and it is characterized in that: the weight ratio of described AgNi cladding powder and AgNiCu alloyed powder is 1:1 to 1:5.
5. silver-colored nickel according to claim 1 is answered the production technology of silver nickel copper electrical contact, and it is characterized in that: in the described step (1), Ag powder purity: Ag% 〉=99.5, Ni powder purity: Ni% 〉=99.5, Ag, Ni alloyed powder apparent density are 1.5 g/cm
2-3.0g/cm
2
6. silver-colored nickel according to claim 1 is answered the production technology of silver nickel copper electrical contact, it is characterized in that: in the described step (1), Ag powder purity: Ag% 〉=99.5, Cu powder purity: Cu% 〉=99.5, Ni powder purity: Ni% 〉=99.5, the apparent density of AgNiCu alloyed powder are 3.0g/cm
2Above.
7. the production technology of the multiple silver nickel copper electrical contact of silver-colored nickel according to claim 1 is characterized in that: in the described step (1), it is 3 hours that described Ag, Ni, Cu powder are packed into mixed in the mixed powder machine of V-type.
8. silver-colored nickel according to claim 1 is answered the production technology of silver nickel copper electrical contact; it is characterized in that: in the described step (2); it is 650 ± 20 ℃ that AgNi coated composite powder and AgNiCu mixing powder are placed on respectively furnace temperature, under the condition of hydrogen as protective gas, and sintering 1 hour.
9. the production technology of the multiple silver nickel copper electrical contact of silver-colored nickel according to claim 1 is characterized in that: in the described step (2), the AgNi alloy-coated powder behind the sintering is made the particle that particle diameter is 0.4mm-0.6mm; AgNiCu alloyed powder behind the sintering is made the particle that particle diameter is 0.4mm-0.6mm.
10. the production technology of the multiple silver nickel copper electrical contact of silver-colored nickel according to claim 1 is characterized in that: the sintering in the described step (4), 820 ± 20 ℃ of furnace temperature are incubated 2 hours, and with hydrogen as protective gas.
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|---|---|---|---|
| CN 201110454840 CN102430755B (en) | 2011-12-30 | 2011-12-30 | Process for manufacturing sliver-nickel composite silver-nickel-copper electrical contact |
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| CN102430755B true CN102430755B (en) | 2013-01-30 |
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| CN103551575A (en) * | 2013-10-31 | 2014-02-05 | 福达合金材料股份有限公司 | Preparation method of soft magnetic electrical contact material with self-arc-quenching characteristic and product obtained by same |
| JP2020200503A (en) * | 2019-06-10 | 2020-12-17 | 日本電産株式会社 | Electrical contact material, and manufacturing method of electrical contact material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1145387A (en) * | 1965-10-04 | 1969-03-12 | Mallory Metallurg Prod Ltd | Sintered silver-copper contact material |
| CN1062928A (en) * | 1990-12-28 | 1992-07-22 | 中南工业大学 | The metallurgical contact alloy of tungsten-copper-silver-nickel by powder |
| CN101176175A (en) * | 2005-05-11 | 2008-05-07 | Abb服务有限公司 | Multiple component electrical contact |
| CN101343700A (en) * | 2008-08-25 | 2009-01-14 | 倪树春 | Ag/Ti3SiC2 electric contact material and manufacturing process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5754236A (en) * | 1980-09-19 | 1982-03-31 | Mitsubishi Electric Corp | Manufacture for electric contact material |
-
2011
- 2011-12-30 CN CN 201110454840 patent/CN102430755B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1145387A (en) * | 1965-10-04 | 1969-03-12 | Mallory Metallurg Prod Ltd | Sintered silver-copper contact material |
| CN1062928A (en) * | 1990-12-28 | 1992-07-22 | 中南工业大学 | The metallurgical contact alloy of tungsten-copper-silver-nickel by powder |
| CN101176175A (en) * | 2005-05-11 | 2008-05-07 | Abb服务有限公司 | Multiple component electrical contact |
| CN101343700A (en) * | 2008-08-25 | 2009-01-14 | 倪树春 | Ag/Ti3SiC2 electric contact material and manufacturing process |
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