CN114346602A - Contact for aluminum-copper-tungsten composite high-voltage electric appliance and manufacturing method - Google Patents
Contact for aluminum-copper-tungsten composite high-voltage electric appliance and manufacturing method Download PDFInfo
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- CN114346602A CN114346602A CN202111637592.4A CN202111637592A CN114346602A CN 114346602 A CN114346602 A CN 114346602A CN 202111637592 A CN202111637592 A CN 202111637592A CN 114346602 A CN114346602 A CN 114346602A
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- copper
- aluminum
- contact
- voltage electric
- tungsten
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- 239000002131 composite material Substances 0.000 title claims abstract description 21
- -1 aluminum-copper-tungsten Chemical compound 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 57
- 229910052802 copper Inorganic materials 0.000 claims abstract description 53
- 239000010949 copper Substances 0.000 claims abstract description 53
- 238000003466 welding Methods 0.000 claims abstract description 26
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 16
- 229910001080 W alloy Inorganic materials 0.000 claims abstract description 11
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 10
- 230000007704 transition Effects 0.000 claims abstract description 8
- 239000007791 liquid phase Substances 0.000 claims abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 6
- 239000002905 metal composite material Substances 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 150000004699 copper complex Chemical class 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000004663 powder metallurgy Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
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Abstract
The invention discloses a contact for an aluminum-copper-tungsten composite high-voltage electric appliance and a manufacturing method, belonging to the technical field of high-voltage electric appliance switch preparation. The manufacturing process of the contact for the aluminum-copper-tungsten composite high-voltage electric appliance is characterized in that copper-tungsten and copper are integrally sintered in a liquid phase mode, the copper and the copper-tungsten form a metallurgical bonding at high temperature, meanwhile, redundant copper forms a transition layer, and the copper is connected with aluminum by friction stir welding; the contact and the contact finger adopt copper-tungsten alloy and copper, so that the high-voltage electric appliance has excellent conductivity and wear resistance, and the performance of the high-voltage electric appliance is ensured to be unchanged during opening and closing; and the second conductive section adopts 6 series aluminum alloy, so that the normal through-current capacity of the switch after switching on can be met, the weight is reduced by 2/3, and the comprehensive cost is reduced by about 30%.
Description
Technical Field
The invention belongs to the technical field of high-voltage electrical appliance switch preparation, and particularly relates to a contact for an aluminum-copper-tungsten composite high-voltage electrical appliance and a manufacturing method thereof.
Background
In a high-voltage electrical appliance with a voltage grade of more than 110KV, a three-station moving contact with an arc contact is generally used on the side of a bus, and is used for switching operation, so that a power supply line is switched from one group of buses to another group of buses under the condition of no power failure, and the buses need to be opened and closed to convert current (1600A 100 times of the requirement of 110 kV). The moving contact of the bus three-station isolating switch has low moving speed, and the time of electric arc generated when the bus is switched on and off to convert current is long, so that the contact is easy to burn, and in order to meet the requirements of national standards, a high-temperature-resistant three-station moving contact is required; the copper tungsten arc contact can serve this role (as shown in figure 1).
The traditional copper-tungsten contact adopts an integral liquid phase sintering or electron beam welding process to combine copper and copper-tungsten alloy, and has large weight and high cost.
Disclosure of Invention
The invention aims to provide a contact for an aluminum-copper-tungsten composite high-voltage electric appliance and a manufacturing method, and is characterized in that the contact for the aluminum-copper-tungsten composite high-voltage electric appliance is a contact for a high-voltage electric appliance compounded by three metals; the main characteristics are as follows: aluminum is an excellent substitute of copper, the price of the aluminum is 1/3 of the copper, the specific gravity of the aluminum is 1/3 of the copper, while the conductivity of 6063-T6 aluminum alloy can reach more than 50 percent of the copper, and the hardness is even better than that of the copper; therefore, the arc extinguishing section adopts copper-tungsten alloy, the transition section adopts copper, and the conducting sections adopt 6 series (6063-T6) aluminum alloy to be sequentially connected to form the contact for the aluminum-copper-tungsten composite high-voltage electric appliance.
The manufacturing method of the contact for the aluminum-copper-tungsten composite high-voltage electric appliance is characterized in that the manufacturing process of the contact for the aluminum-copper-tungsten composite high-voltage electric appliance is as follows: copper-tungsten and copper are sintered integrally in a liquid phase mode, the copper and the copper-tungsten form metallurgical bonding at high temperature, meanwhile, redundant copper forms a transition layer, and the copper is connected with aluminum by friction stir welding; the specific manufacturing process is as follows:
(1) pressing a copper-tungsten alloy blank by adopting a powder metallurgy method;
(2) placing the blank in a graphite boat, placing sufficient feeding copper on the upper part of the blank, sintering for 40-90 minutes under the protection of high-purity nitrogen at 1380 +/-20 ℃, and then cooling along with a furnace;
(3) machining the sintered copper-tungsten and copper complex, simultaneously machining and matching the aluminum piece, cleaning and drying;
(4) a rotary tool is adopted on a friction stir welding machine for welding, a stirring head is made of high-temperature alloy, and the stirring head is offset from the copper side by 1-2mm due to large difference of melting points of copper and aluminum and is used for balancing heat distribution of different materials; the welding depth is larger than the wall thickness of a product, the size of a shaft shoulder is phi 14-20mm, a stirring head is not moved, the rotating welding linear speed of a tool is 30-60mm/min, a welding inlet hole and a welding outlet hole are overlapped, and a rack groove is removed when the rack groove is milled;
(5) after welding, carrying out rolling treatment on the copper section, wherein the Brinell hardness is more than HB 80;
(6) and after turning, milling a rack groove in the conductive section along the long axis direction.
The rack groove is a rectangular through groove.
The invention has the beneficial effects that the invention is a trimetal composite contact, which has the advantages that: a, the contact and the contact finger are impacted in the copper-tungsten alloy and a range of about 20-40mm behind the copper-tungsten alloy, and the copper is adopted, so that the performance of the high-voltage electric appliance is ensured to be unchanged during opening and closing by utilizing the conductive performance advantage and the wear resistance of the copper; and B, the conductive section adopts 6-series aluminum alloy, so that the normal through-current capacity of the switch after switching on can be met, the weight is reduced by 2/3, and the comprehensive cost is reduced by about 30%.
Drawings
Fig. 1 is a schematic diagram of two conventional metal composite contacts.
Fig. 2 is a schematic diagram of a three metal composite contact.
Detailed Description
The invention provides a contact for an aluminum-copper-tungsten composite high-voltage electric device and a manufacturing method thereof, and the invention is described below by combining the accompanying drawings.
Fig. 2 is a schematic diagram of a three metal composite contact. The contact for the high-voltage electric appliance compounded by three metals is shown in the figure as an aluminum-copper-tungsten compound contact for the high-voltage electric appliance; the main characteristics are as follows: aluminum is an excellent substitute of copper, the price of the aluminum is 1/3 of the copper, the specific gravity of the aluminum is 1/3 of the copper, while the conductivity of 6063-T6 aluminum alloy can reach more than 50 percent of the copper, and the hardness is even better than that of the copper; therefore, the arc extinguishing section adopts copper-tungsten alloy, the transition section adopts copper, and the conducting section adopts 6-series (6063-T6) aluminum alloy, namely, the aluminum, copper and copper-tungsten composite contacts are sequentially connected to form the contact for the aluminum-copper-tungsten composite high-voltage electric appliance.
The manufacturing process of the contact for the aluminum-copper-tungsten composite high-voltage electrical appliance comprises the following steps: copper-tungsten and copper are sintered integrally in a liquid phase mode, the copper and the copper-tungsten form metallurgical bonding at high temperature, meanwhile, redundant copper forms a transition layer, and the copper is connected with aluminum by friction stir welding; the specific manufacturing process is as follows:
(1) pressing a copper-tungsten alloy blank by adopting a powder metallurgy method;
(2) placing the blank in a graphite boat, placing sufficient feeding copper on the upper part of the blank, sintering for 40-90 minutes under the protection of high-purity nitrogen at 1380 +/-20 ℃, and then cooling along with a furnace;
(3) machining the sintered copper-tungsten and copper complex, simultaneously machining and matching the aluminum piece, cleaning and drying;
(4) a rotary tool is adopted on a friction stir welding machine for welding, a stirring head is made of high-temperature alloy, and the stirring head is offset from the copper side by 1-2mm due to large difference of melting points of copper and aluminum and is used for balancing heat distribution of different materials; the welding depth is larger than the wall thickness of a product, the size of a shaft shoulder is phi 14-20mm, a stirring head is not moved, the rotating welding linear speed of a tool is 30-60mm/min, a welding inlet hole and a welding outlet hole are overlapped, and a rack groove is removed when the rack groove is milled;
(5) after welding, carrying out rolling treatment on the copper section, wherein the Brinell hardness is more than HB 80;
(6) and milling a rack groove in the long axis direction of the conductive section after turning, wherein the rack groove is a rectangular through groove.
Claims (3)
1. The contact for the aluminum-copper-tungsten composite high-voltage electric appliance is characterized in that the contact for the aluminum-copper-tungsten composite high-voltage electric appliance is a contact for a high-voltage electric appliance compounded by three metals; the main characteristics are as follows: aluminum is an excellent substitute of copper, the price of the aluminum is 1/3 of the copper, the specific gravity of the aluminum is 1/3 of the copper, while the conductivity of 6063-T6 aluminum alloy can reach more than 50 percent of the copper, and the hardness is even better than that of the copper; therefore, the arc extinguishing section adopts copper-tungsten alloy, the transition section adopts copper, and the conducting section adopts 6063-T6 aluminum alloy which are connected in sequence to form the contact for the aluminum-copper-tungsten composite high-voltage electric appliance and the manufacturing method, and the contact for the three-metal composite high-voltage electric appliance is characterized in that the contact for the three-metal composite high-voltage electric appliance is a contact for the three-metal composite high-voltage electric appliance; the main characteristics are as follows: aluminum is an excellent substitute of copper, the price of the aluminum is 1/3 of the copper, the specific gravity of the aluminum is 1/3 of the copper, while the conductivity of 6063-T6 aluminum alloy can reach more than 50 percent of the copper, and the hardness is even better than that of the copper; therefore, the arc extinguishing section adopts copper-tungsten alloy, the transition section adopts copper, and the conducting section adopts 6063-T6 aluminum alloy to be connected in sequence to form the contact for the high-voltage electric appliance with three metals compounded.
2. The manufacturing method of the contact for the aluminum-copper-tungsten composite high-voltage electric appliance is characterized in that the manufacturing process of the contact for the aluminum-copper-tungsten composite high-voltage electric appliance is as follows: copper-tungsten and copper are sintered integrally in a liquid phase mode, the copper and the copper-tungsten form metallurgical bonding at high temperature, meanwhile, redundant copper forms a transition layer, and the copper is connected with aluminum by friction stir welding; the specific manufacturing process is as follows:
(1) pressing a copper-tungsten alloy blank by adopting a powder metallurgy method;
(2) placing the blank in a graphite boat, placing sufficient feeding copper on the upper part of the blank, sintering for 40-90 minutes under the protection of high-purity nitrogen at 1380 +/-20 ℃, and then cooling along with a furnace;
(3) machining the sintered copper-tungsten and copper complex, simultaneously machining and matching the aluminum piece, cleaning and drying;
(4) a rotary tool is adopted on a friction stir welding machine for welding, a stirring head is made of high-temperature alloy, and the stirring head is offset from the copper side by 1-2mm due to large difference of melting points of copper and aluminum and is used for balancing heat distribution of different materials; the welding depth is larger than the wall thickness of a product, the size of a shaft shoulder is phi 14-20mm, a stirring head is not moved, the rotating welding linear speed of a tool is 30-60mm/min, a welding inlet hole and a welding outlet hole are overlapped, and a rack groove is removed when the rack groove is milled;
(5) after welding, carrying out rolling treatment on the copper section, wherein the Brinell hardness is more than HB 80;
(6) and after turning, milling a rack groove in the conductive section along the long axis direction.
3. The method of manufacturing a contact for an aluminum-copper-tungsten composite high-voltage electric machine according to claim 2, wherein the rack groove is a rectangular through groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111637592.4A CN114346602A (en) | 2021-12-30 | 2021-12-30 | Contact for aluminum-copper-tungsten composite high-voltage electric appliance and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111637592.4A CN114346602A (en) | 2021-12-30 | 2021-12-30 | Contact for aluminum-copper-tungsten composite high-voltage electric appliance and manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114346602A true CN114346602A (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111637592.4A Pending CN114346602A (en) | 2021-12-30 | 2021-12-30 | Contact for aluminum-copper-tungsten composite high-voltage electric appliance and manufacturing method |
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| Country | Link |
|---|---|
| CN (1) | CN114346602A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1223190A (en) * | 1997-11-19 | 1999-07-21 | 东芝株式会社 | Binding structure for different kinds of metal |
| JP2000246549A (en) * | 1999-02-25 | 2000-09-12 | Toshiba Corp | Joining structure and method for dissimilar metal material |
| JP2002283493A (en) * | 2001-03-22 | 2002-10-03 | Toshiba Corp | Bonding structure of different metal materials |
| CN2911914Y (en) * | 2006-03-03 | 2007-06-13 | 段沛林 | Composite copper/aluminum conducting pole |
| CN104409227A (en) * | 2014-11-10 | 2015-03-11 | 山东泰开高压开关有限公司 | Arc contact processed by various materials for high-voltage switch |
| CN105590771A (en) * | 2015-12-29 | 2016-05-18 | 陕西斯瑞新材料股份有限公司 | Manufacturing method of copper-tungsten load switch |
| CN112894123A (en) * | 2021-01-29 | 2021-06-04 | 华南理工大学 | Friction stir welding method for aluminum-copper dissimilar metal |
-
2021
- 2021-12-30 CN CN202111637592.4A patent/CN114346602A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1223190A (en) * | 1997-11-19 | 1999-07-21 | 东芝株式会社 | Binding structure for different kinds of metal |
| JP2000246549A (en) * | 1999-02-25 | 2000-09-12 | Toshiba Corp | Joining structure and method for dissimilar metal material |
| JP2002283493A (en) * | 2001-03-22 | 2002-10-03 | Toshiba Corp | Bonding structure of different metal materials |
| CN2911914Y (en) * | 2006-03-03 | 2007-06-13 | 段沛林 | Composite copper/aluminum conducting pole |
| CN104409227A (en) * | 2014-11-10 | 2015-03-11 | 山东泰开高压开关有限公司 | Arc contact processed by various materials for high-voltage switch |
| CN105590771A (en) * | 2015-12-29 | 2016-05-18 | 陕西斯瑞新材料股份有限公司 | Manufacturing method of copper-tungsten load switch |
| CN112894123A (en) * | 2021-01-29 | 2021-06-04 | 华南理工大学 | Friction stir welding method for aluminum-copper dissimilar metal |
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