CN103247450A - Electrical contact - Google Patents
Electrical contact Download PDFInfo
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- CN103247450A CN103247450A CN2013101400011A CN201310140001A CN103247450A CN 103247450 A CN103247450 A CN 103247450A CN 2013101400011 A CN2013101400011 A CN 2013101400011A CN 201310140001 A CN201310140001 A CN 201310140001A CN 103247450 A CN103247450 A CN 103247450A
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- Prior art keywords
- powder
- infiltration
- electrical contact
- weighing
- mixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 239000010949 copper Substances 0.000 claims abstract description 52
- 239000000843 powder Substances 0.000 claims abstract description 40
- 230000008595 infiltration Effects 0.000 claims abstract description 25
- 238000001764 infiltration Methods 0.000 claims abstract description 25
- 229910052802 copper Inorganic materials 0.000 claims abstract description 23
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 15
- 239000010439 graphite Substances 0.000 claims abstract description 15
- 238000005303 weighing Methods 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 6
- 239000001257 hydrogen Substances 0.000 claims abstract description 6
- 238000012856 packing Methods 0.000 claims description 13
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 abstract description 8
- 239000004332 silver Substances 0.000 abstract description 7
- 238000005469 granulation Methods 0.000 abstract description 4
- 230000003179 granulation Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- 239000010944 silver (metal) Substances 0.000 description 18
- 239000000463 material Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 3
- 238000003556 assay Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000002932 luster Substances 0.000 description 3
- 210000001161 mammalian embryo Anatomy 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 239000010946 fine silver Substances 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 229910052946 acanthite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- XUARKZBEFFVFRG-UHFFFAOYSA-N silver sulfide Chemical compound [S-2].[Ag+].[Ag+] XUARKZBEFFVFRG-UHFFFAOYSA-N 0.000 description 1
- 229940056910 silver sulfide Drugs 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Contacts (AREA)
Abstract
The invention relates to an electrical contact and a preparation method thereof. The preparation method of the electrical contact comprises the process steps of weighing, mixing, granulation, initial pressing, infiltration, re-pressing, cleaning, inspection and packaging which are specifically as follows: a, weighing: weighing Ag powder, Cu powder, infiltration copper sheets and W powder according to the proportion of 28%-34% : 2% : 16% - 20% : 48%-52%; b, mixing: uniformly mixing the Ag powder, Cu powder and W powder weighed in the step a and filling into a graphite boat, putting the graphite boat into a furnace with the temperature of 880-920 DEG C for heat preservation for 2-3 hours, then cooling and taking out the graphite boat; and c, infiltration: placing the formed blank through initial pressing on a graphite plate, laying infiltration copper sheets on the surface of the formed blank, performing infiltration with the furnace temperature of 1180-1220 DEG C, then after 8-10 min, pushing away half of the graphite boat and introducing hydrogen for protection. The electrical contact prepared by the invention saves silver, and is large in density and hardness, and lower in resistivity.
Description
Technical field
The present invention relates to a kind of electrical contact, be specifically related to a kind of electrical contact and preparation method thereof.
Background technology
Contact material is used as contact materials such as appliance switch, instrument and meter, is undertaking the task of connection and breaking current, and therefore, its performance quality directly affects reliability service and the useful life of appliance switch and instrument and meter.The phenomenon that electrical contact produces in the switching process is extremely complicated, and influencing factor is more, and desirable contact material must possess good physical property, electrical contact performance, processing and manufacturing performance etc.
The contact material of drought period adopts fine silver more, but because silver point is low, hardness is not high and not wear-resisting, in the medium of sulfur-bearing or sulfide, and table and easily form the silver sulfide film; Under the direct current effect, volatile, easily form the electroerosion spine, silver-colored contact element easily forms electric arc, makes its welding.In order to overcome the various shortcoming of fine silver contact material, develop silver alloy, namely in silver, added a small amount of other element such as Cu, Cd, Pd, Au, Mg, In, V, Zr etc. can overcome the flexible naturally of silver, improve mechanical property and corrosion resistance, and still keep higher conductance.
Along with the history of industrialized fast development and electronic product is newly regenerated, more and more higher requirement has been proposed for the research and development of contact material.
When electrical contact was on the market made at present, silver content was higher, and the production cost that this has improved electrical contact greatly makes its price comparatively expensive.
Summary of the invention
According to the deficiencies in the prior art, the invention provides a kind of silver, density is big, hardness is big, resistivity is lower electrical contact of saving.
According to the deficiencies in the prior art, technical scheme provided by the invention is: a kind of electrical contact, and composed of the following components, and the ratio of each component is:
Ag：Cu：W=28%～34%：18%～22%：48%～52%。
A kind of electrical contact: composed of the following components, and the ratio of each component is: Ag:Cu:W=28%:22%:50%.
A kind of preparation method of electrical contact comprises weighing-mixing-granulation-first pressing-infiltration-multiple pressure the-cleaning-check-packing, comprises following processing step:
A weighing: with the ratio weighing in 28%～34%:2%:16%～20%:48%～52% of Ag powder, Cu powder, infiltration copper sheet and W powder;
B mixes: with the load weighted Ag powder of step a, Cu powder and W powder, in the graphite boat of packing into behind the mixing, cooling is taken out after putting into 880 ℃～920 ℃ stove and being incubated 2～3 hours;
The C infiltration: the first pressing shaping block is emitted on the graphite cake, above lay infiltration copper sheet, carry out infiltration, furnace temperature is 1180 ℃～1220 ℃, pushes away half boat in 8～10 minutes, and feeds hydrogen shield.
Described silver powder: Ag% 〉=99.5, apparent density are 1.5～3.0 g/cm
2Copper powder: Cu% 〉=99.5; Tungsten powder: W% 〉=99.9, granularity are 2.5～5.5 μ; Copper sheet: Cu % 〉=99.9.
The invention has the beneficial effects as follows: the present invention adopts Ag, Cu and three kinds of feedstock production electrical contacts of W, has saved silver, and the electrical contact density of preparation is big, hardness big, resistivity is lower.
Embodiment
Embodiment one
A kind of electrical contact, composed of the following components, and the ratio of each component is:
Ag：Cu：W=28%：22%：50%。
This preparation method comprises weighing-mixing-granulation-first pressing-infiltration-multiple pressure the-cleaning-check-packing, comprises following processing step:
1, weighing: with the ratio weighing in 28%:2%:20%:50% of Ag powder, Cu powder, infiltration copper sheet and W powder; Choose silver powder: Ag% 〉=99.5, apparent density are 1.5～3.0 g/cm
2Copper powder: Cu% 〉=99.5; Tungsten powder: W% 〉=99.9, granularity are 2.5～5.5 μ; Copper sheet: Cu % 〉=99.9.
2, mix: with the load weighted Ag powder of step a, Cu powder and W powder, in the graphite boat of packing into behind the mixing, cooling is taken out after putting into 880 ℃～920 ℃ stove and being incubated 2～3 hours.
3, granulation: make particle about the about 0.5mm of particle diameter with granulator again.
4, first pressing: according to product drawing check and correction mould and relevant size, according to product weight, press the embryo height, the pressure on the unit are etc. is suppressed, and checks at any time, the instant adjustment of pinpointing the problems.
5, infiltration: the first pressing shaping block is emitted on the graphite cake, above lay infiltration copper sheet, carry out infiltration, furnace temperature is 1180 ℃, pushes away half boat in 8 minutes, and feeds hydrogen shield.
6, the multiple pressure: product size after pressure testing, density through head examine qualified after, the multiple pressure in batches again.And require no burr, the surface should be smooth smooth, do not have depression and projection.
7, clean: the deburring polishing makes product surface color and luster uniformity.
8, check: the presentation quality of product also can be by magnifying glass (10X), tool microscope observation generally with range estimation.Size is tested with the outside micrometer that vernier caliper and the scale division value of accuracy value 0.02mm is 0.01mm, and every batch is randomly drawed 3～5 (8～12 of points) and send physics and chemistry to carry out physico-chemical analysis.
Packing: after the assay was approved, just can pack, product must be placed in the polybag of sealing.Prepared electrical contact detects its physical and mechanical property and sees Table 1.
Embodiment two
A kind of electrical contact, composed of the following components, and the ratio of each component is:
Ag：Cu：W=30%：18%：52%。
This preparation method comprises weighing-mixing-granulation-first pressing-infiltration-multiple pressure the-cleaning-check-packing, comprises following processing step:
1, weighing: with the ratio weighing in 30%:2%:16%:52% of Ag powder, Cu powder, infiltration copper sheet and W powder; Choose silver powder: Ag% 〉=99.5, apparent density are 1.5～3.0 g/cm
2Copper powder: Cu% 〉=99.5; Tungsten powder: W% 〉=99.9, granularity are 2.5～5.5 μ; Copper sheet: Cu % 〉=99.9.
2, mix: with the load weighted Ag powder of step a, Cu powder and W powder, in the graphite boat of packing into behind the mixing, cooling is taken out after putting into 880 ℃～920 ℃ stove and being incubated 2～3 hours.
3, granulation: make particle about the about 0.5mm of particle diameter with granulator again.
4, first pressing: according to product drawing check and correction mould and relevant size, according to product weight, press the embryo height, the pressure on the unit are etc. is suppressed, and checks at any time, the instant adjustment of pinpointing the problems.
5, infiltration: the first pressing shaping block is emitted on the graphite cake, above lay infiltration copper sheet, carry out infiltration, furnace temperature is 1220 ℃, pushes away half boat in 10 minutes, and feeds hydrogen shield.
6, the multiple pressure: product size after pressure testing, density through head examine qualified after, the multiple pressure in batches again.And require no burr, the surface should be smooth smooth, do not have depression and projection.
7, clean: the deburring polishing makes product surface color and luster uniformity.
8, check: the presentation quality of product also can be by magnifying glass (10X), tool microscope observation generally with range estimation.Size is tested with the outside micrometer that vernier caliper and the scale division value of accuracy value 0.02mm is 0.01mm, and every batch is randomly drawed 3～5 (8～12 of points) and send physics and chemistry to carry out physico-chemical analysis.
Packing: after the assay was approved, just can pack, product must be placed in the polybag of sealing.Prepared electrical contact detects its physical and mechanical property and sees Table 1.
Embodiment three
A kind of electrical contact, composed of the following components, and the ratio of each component is:
Ag：Cu：W=34%：18%：48%。
This preparation method comprises weighing-mixing-granulation-first pressing-infiltration-multiple pressure the-cleaning-check-packing, comprises following processing step:
1, weighing: with the ratio weighing in 32%:2%:16%:48% of Ag powder, Cu powder, infiltration copper sheet and W powder; Choose silver powder: Ag% 〉=99.5, apparent density are 1.5～3.0 g/cm
2Copper powder: Cu% 〉=99.5; Tungsten powder: W% 〉=99.9, granularity are 2.5～5.5 μ; Copper sheet: Cu % 〉=99.9.
2, mix: with the load weighted Ag powder of step a, Cu powder and W powder, in the graphite boat of packing into behind the mixing, cooling is taken out after putting into 880 ℃～920 ℃ stove and being incubated 2～3 hours.
3, granulation: make particle about the about 0.5mm of particle diameter with granulator again.
4, first pressing: according to product drawing check and correction mould and relevant size, according to product weight, press the embryo height, the pressure on the unit are etc. is suppressed, and checks at any time, the instant adjustment of pinpointing the problems.
5, infiltration: the first pressing shaping block is emitted on the graphite cake, above lay infiltration copper sheet, carry out infiltration, furnace temperature is 1200 ℃, pushes away half boat in 9 minutes, and feeds hydrogen shield.
6, the multiple pressure: product size after pressure testing, density through head examine qualified after, the multiple pressure in batches again.And require no burr, the surface should be smooth smooth, do not have depression and projection.
7, clean: the deburring polishing makes product surface color and luster uniformity.
8, check: the presentation quality of product also can be by magnifying glass (10X), tool microscope observation generally with range estimation.Size is tested with the outside micrometer that vernier caliper and the scale division value of accuracy value 0.02mm is 0.01mm, and every batch is randomly drawed 3～5 (8～12 of points) and send physics and chemistry to carry out physico-chemical analysis.
Packing: after the assay was approved, just can pack, product must be placed in the polybag of sealing.Prepared electrical contact detects its physical and mechanical property and sees Table 1.
| Embodiment | Density (g/cm 3） | Resistivity (μ Ω .cm) | Hardness HB (kgf/mm2) |
| Embodiment one | 12.40 | 3.2 | 110 |
| Embodiment two | 12.41 | 3.1 | 112 |
| Embodiment three | 12.45 | 3.0 | 114 |
As known from Table 1, the electrical contact of the present invention's preparation has the advantage that density is higher, resistivity is lower, hardness is big.
Claims (4)
1. electrical contact is characterized in that: composed of the following components, and the ratio of each component is:
Ag：Cu：W=28%～34%：18%～22%：48%～52%。
2. a kind of electrical contact according to claim 1 is characterized in that: composed of the following components, and the ratio of each component is: Ag:Cu:W=28%:22%:50%.
3.
The preparation method of the described electrical contact of a kind of claim 1 comprises weighing-mixing-granulation-first pressing-infiltration-multiple pressure the-cleaning-check-packing, it is characterized in that: comprise following processing step:
A weighing: with the ratio weighing in 28%～34%:2%:16%～20%:48%～52% of Ag powder, Cu powder, infiltration copper sheet and W powder;
B mixes: with the load weighted Ag powder of step a, Cu powder and W powder, in the graphite boat of packing into behind the mixing, cooling is taken out after putting into 880 ℃～920 ℃ stove and being incubated 2～3 hours;
The C infiltration: the first pressing shaping block is emitted on the graphite cake, above lay infiltration copper sheet, carry out infiltration, furnace temperature is 1180 ℃～1220 ℃, pushes away half boat in 8～10 minutes, and feeds hydrogen shield.
4.
Preparation method as a kind of electrical contact as described in the claim 3 is characterized in that: described
Silver powder: Ag% 〉=99.5, apparent density are 1.5～3.0 g/cm
2
Copper powder: Cu% 〉=99.5;
Tungsten powder: W% 〉=99.9, granularity are 2.5～5.5 μ;
Copper sheet: Cu % 〉=99.9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310140001.1A CN103247450B (en) | 2013-04-22 | 2013-04-22 | Electrical contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310140001.1A CN103247450B (en) | 2013-04-22 | 2013-04-22 | Electrical contact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103247450A true CN103247450A (en) | 2013-08-14 |
| CN103247450B CN103247450B (en) | 2015-06-24 |
Family
ID=48926904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310140001.1A Expired - Fee Related CN103247450B (en) | 2013-04-22 | 2013-04-22 | Electrical contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103247450B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824710A (en) * | 2014-03-10 | 2014-05-28 | 温州中希电工合金有限公司 | Method for preparing silver-tungsten carbide contact material from silver-coated tungsten carbide powder and silver-tungsten carbide contact material |
| CN104078249A (en) * | 2014-05-16 | 2014-10-01 | 浙江天银合金技术有限公司 | Silver copper tungsten electrical contact and processing technology thereof |
| CN114318100A (en) * | 2021-12-13 | 2022-04-12 | 合肥工业大学 | Silver-doped tungsten-copper composite material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102392170A (en) * | 2011-11-11 | 2012-03-28 | 扬州乐银合金科技有限公司 | Processing method for manufacturing silver tungsten composite contact material |
| WO2012076281A1 (en) * | 2010-12-06 | 2012-06-14 | Abb Research Ltd | Electrical contact element and an electrical contact |
| CN102522229A (en) * | 2011-12-30 | 2012-06-27 | 浙江天银合金技术有限公司 | Production process of silver-tungsten carbide and silver-nickel-copper compounded electric contact |
-
2013
- 2013-04-22 CN CN201310140001.1A patent/CN103247450B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2012076281A1 (en) * | 2010-12-06 | 2012-06-14 | Abb Research Ltd | Electrical contact element and an electrical contact |
| CN102392170A (en) * | 2011-11-11 | 2012-03-28 | 扬州乐银合金科技有限公司 | Processing method for manufacturing silver tungsten composite contact material |
| CN102522229A (en) * | 2011-12-30 | 2012-06-27 | 浙江天银合金技术有限公司 | Production process of silver-tungsten carbide and silver-nickel-copper compounded electric contact |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824710A (en) * | 2014-03-10 | 2014-05-28 | 温州中希电工合金有限公司 | Method for preparing silver-tungsten carbide contact material from silver-coated tungsten carbide powder and silver-tungsten carbide contact material |
| CN103824710B (en) * | 2014-03-10 | 2015-10-28 | 温州中希电工合金有限公司 | A kind of method of silver-colored cladded wolfram carbide powder preparation silver-tungsten carbide contact material and products thereof |
| CN104078249A (en) * | 2014-05-16 | 2014-10-01 | 浙江天银合金技术有限公司 | Silver copper tungsten electrical contact and processing technology thereof |
| CN114318100A (en) * | 2021-12-13 | 2022-04-12 | 合肥工业大学 | Silver-doped tungsten-copper composite material and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN103247450B (en) | 2015-06-24 |
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