CN105057873A - Method for preparing CuW/Cu/CuCrZr integrated contact through electron beam welding - Google Patents
Method for preparing CuW/Cu/CuCrZr integrated contact through electron beam welding Download PDFInfo
- Publication number
- CN105057873A CN105057873A CN201510426821.6A CN201510426821A CN105057873A CN 105057873 A CN105057873 A CN 105057873A CN 201510426821 A CN201510426821 A CN 201510426821A CN 105057873 A CN105057873 A CN 105057873A
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- Prior art keywords
- cuw
- cucrzr
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- electron beam
- contact
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K15/00—Electron-beam welding or cutting
- B23K15/06—Electron-beam welding or cutting within a vacuum chamber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K15/00—Electron-beam welding or cutting
- B23K15/0033—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K15/00—Electron-beam welding or cutting
- B23K15/0046—Welding
- B23K15/0053—Seam welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/12—Copper or alloys thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention provides a method for preparing a CuW/Cu/CuCrZr integrated contact through electron beam welding and belongs to the field of production and manufacturing of high-voltage switch electrical contacts. One side of the electrical contact is made of a base material CuW/Cu, and the other side of the electrical contact is made of a base material CuCrZr. The method comprises the following steps that 1, the base material CuW/Cu on one side of the electrical contact is manufactured in a connection mode through a sintering method; and 2, the CuW/Cu subjected to sintering treatment and the CuCrZr are subjected to direct electron beam welding, a welding surface is made of Cu and the CuCrZr, a welded joint is a square butt joint, the joint gap value is zero, welding filling materials are not filled, a weld forming a 45-degree angle with the axis of the contact is adopted for electron beam welding, and thermal treatment is not needed after welding. Compared with the prior art, the high-temperature mechanical performance of chromium-copper can be improved, and the high welding strength can be achieved; moreover, it can be guaranteed that a Cu base is not annealed or softened; meanwhile, the stress of a vertical weld heat-affected zone is small, the sectioned contact cannot deform after being pulled and inserted for many times, and the contact finger force is stable.
Description
Technical field
The invention belongs to high-voltage switch gear electrical contact and manufacture field, be specifically related to a kind of electron beam welding preparation method of CuW/Cu/CuCrZr integral contact.
Background technology
Current existing Self-help contact terminal CuW/Cu-CuCrZr, generally adopts integral sintered manufacture method, CuW/Cu is sintered preparation as a whole, and also adopts integral sintered method to be prepared into high-voltage electric contact Cu side and CuCrZr.
Existing technical method is prepared owing to adopting integral sintered method, integral sintered to making electrical contact size on the one hand, especially tail end size is subject to larger restriction, due to the restriction of agglomerating plant, the electrical contact exceeding limited length cannot adopt sintering process to prepare, and can cause very large restriction to the specification of product; On the other hand, backing material (CuCrZr) stands high-temperature sintering process, and electrical contact tissue can be made to change, make its high-temperature mechanical property low, elasticity is deteriorated, and the contact of distinguish can produce distortion after repeatedly plugging, fingertip power is diminished, affects the serviceability of Self-help contact terminal.Especially the tail end prepared by chromium-copper zirconium, in high-temperature sintering process, zr element produces serious volatilization and component segregation, and make it organize the larger change of generation, hydraulic performance decline is serious; In addition, adopt integral sintered method, cannot realize the automation of producing, production efficiency is lower, cost is higher, technology stability is poor, it is high to consume energy and simultaneously also can produce certain environmental pollution.
Summary of the invention
For the problems referred to above, the present invention is directed to the core component of high-voltage switch gear---the high vacuum electron beam welding technique of the dissimilar material joining problem exploitation in contact manufacture process, achieves metallurgical reliably between foreign material connection.
The electron beam welding preparation method of a kind of CuW/Cu/CuCrZr integral contact of the present invention, electrical contact side mother metal is CuW/Cu, opposite side mother metal is CuCrZr, carries out according to following steps:
(1) adopt sintering method to connect and make electrical contact side mother metal CuW/Cu;
(2) CuW/Cu and the CuCrZr of sintering processes is directly carried out electron beam welding, solder side is Cu and CuCrZr, and welding point is flat banjo fixing butt jointing, and play movement amount is 0, do not fill welding filling material, electron beam welding employing and contact axis are the weld seam of miter angle; Postwelding is without the need to heat-treating; Welding parameter scope is as follows:
Rising gradient: 10s,
Downward gradient: 15s,
Rotary speed: 4r/min
Weld interval: 16s,
Filament: 19.0-20.0A,
Focus on: 330-350mA,
Welding line: 120-125mA;
High pressure: 85Kv,
Bias voltage: 705-725V,
Scanning: X50mA, Y50mA,
Frequency: 500Hz.
Described employing sintering method connects makes electrical contact side mother metal CuW/Cu, be specially: first pure W alloy powder is inserted in mould, then applying 100-120MPa static pressure makes alloyed powder closely knit, the Cu of 1.5 times of W volume parts is placed on closely knit W alloy powder again and heats, heating-up temperature is for reaching 1100-1120 DEG C, Cu is melted, when being heated to Cu fusion temperature, Cu fusing also flows full W alloy block along alloyed powder space, remaining liquid Cu is distributed on W alloy block, namely forms the firm sintered joint of CuW/Cu after cooling.
Contact tail adopts CuGrZr to make contact at high temperature keep good to carry out performance, electron beam welding employing and contact axis are the weld seam of miter angle, adding fusion length makes contact integrated connection intensity improve, mechanical enhancer method is adopted to the as-cast structure of electron beam welding fusing, makes the fingertip power of Self-help contact terminal reach high requirement and fingertip power can not be reduced because plug number of times increases.
Compared with the prior art, the present invention can not only improve chromium-copper high-temperature mechanical property, obtains very high weld strength, and can ensure that again Cu base is unannealed softening, vertical weld heat affected area is stressed little simultaneously, and the contact of distinguish can not produce distortion after repeatedly plugging, and fingertip power is stablized.
The present invention is directed to the core component of high-voltage switch gear---the high vacuum electron beam welding technique of the dissimilar material joining problem exploitation in contact manufacture process, achieve metallurgical reliably between foreign material connection, instead of traditional integral sintered process, adopt the Cu/40crMoA electron beam welding linkage interface of this process smooth, even tissue, segregation and the coarse grains of element can not be produced, the high-temperature electric conduction performance of contact can be improved, improve the high-temperature mechanical property of contact; Adopt electro-beam welding method simultaneously, do not limit the size of electrical contact tail end, the electrical contact of various model specification all can manufacture, and has widened product type; Compared with the integral sintered technique manufacturing method of liquid phase, electron beam welding automaticity is higher, and welding process is simple, and technology stability is good, can guarantee stable and reliable product quality, and yield rate improves about 5%; Stock utilization improves more than 20%, and production efficiency improves more than 5 times, reduces costs, economize energy, has obviously economic benefit; Welding process cleans simultaneously, non smoke and welding slag, reduces the pollution produced environment, is a kind of processing technology of environmental protection, has obvious social benefit.
Accompanying drawing explanation
Fig. 1 is the metal solder interface of embodiment 1.
Fig. 2 is the metal solder interface of embodiment 2.
Fig. 3 is the metal solder interface of embodiment 3
Detailed description of the invention
Below by embodiment, the specific embodiment of the invention is further detailed.
Employing sintering method of the present invention connects makes electrical contact side mother metal CuW/Cu, be specially: first pure W alloy powder is inserted in mould, then applying 100-120MPa static pressure makes alloyed powder closely knit, the Cu of 1.5 times of W volume parts is placed on closely knit W alloy powder again and heats, heating-up temperature is for reaching 1100-1120 DEG C, Cu is melted, when being heated to Cu fusion temperature, Cu fusing also flows full W alloy block along alloyed powder space, remaining liquid Cu is distributed on W alloy block, namely forms the firm sintered joint of CuW/Cu after cooling.
Embodiment 1
CuW/Cu and the CuCrZr of sintering processes is directly carried out electron beam welding, solder side is Cu and CuCrZr, welding point is flat banjo fixing butt jointing, play movement amount is 0, do not fill welding filling material, electron beam welding employing and contact axis are the weld seam of miter angle, and postwelding is without the need to heat-treating, and electron beam welding uses equipment: THDW-15 electron-beam welder;
Welding parameter: rising gradient: 10s,
Downward gradient: 15s,
Rotary speed: 4r/min
Weld interval: 16s,
Filament: 20A,
Focus on: 330mA,
Welding line: 122mA;
High pressure: 85Kv,
Bias voltage: 705V,
Scanning: X50mA, Y50mA,
Frequency: 500Hz.
After welding, Welded Joints is observed, and Fig. 1 is metal solder interface, and linkage interface is smooth, and there is comparatively thick column crystal commissure, but grain growth is not strong, and butt joint performance has no significant effect.
Interventions Requested: Cu-CuCrZr electro-beam welding joint hot strength detects
Performance: joint tensile strength is 347.1MPa, fracture position is copper side mother metal.
Embodiment 2
CuW/Cu and the CuCrZr of sintering processes is directly carried out electron beam welding, solder side is Cu and CuCrZr, welding point is flat banjo fixing butt jointing, play movement amount is 0, do not fill welding filling material, electron beam welding employing and contact axis are the weld seam of miter angle, and postwelding is without the need to heat-treating, and electron beam welding uses equipment: THDW-15 electron-beam welder;
Welding parameter: rising gradient: 10s,
Downward gradient: 15s,
Rotary speed: 4r/min
Weld interval: 16s,
Filament: 19.5A,
Focus on: 340mA,
Welding line: 120mA;
High pressure: 85Kv,
Bias voltage: 715V,
Scanning: X50mA, Y50mA,
Frequency: 500Hz.
After welding, Welded Joints is observed, and Fig. 2 is metal solder interface, and linkage interface is smooth, and there is comparatively thick column crystal commissure, but grain growth is not strong, and butt joint performance has no significant effect.
Interventions Requested: Cu-CuCrZr electro-beam welding joint hot strength detects
Performance: joint tensile strength is 336.4MPa, fracture position is copper side mother metal.
Embodiment 3
CuW/Cu and the CuCrZr of sintering processes is directly carried out electron beam welding, solder side is Cu and CuCrZr, welding point is flat banjo fixing butt jointing, play movement amount is 0, do not fill welding filling material, electron beam welding employing and contact axis are the weld seam of miter angle, and postwelding is without the need to heat-treating, and electron beam welding uses equipment: THDW-15 electron-beam welder;
Welding parameter: rising gradient: 10s,
Downward gradient: 15s,
Rotary speed: 4r/min
Weld interval: 16s,
Filament: 19.0A,
Focus on: 350mA,
Welding line: 125mA;
High pressure: 85Kv,
Bias voltage: 725V,
Scanning: X50mA, Y50mA,
Frequency: 500Hz.
After welding, Welded Joints is observed, and Fig. 3 is metal solder interface, and linkage interface is smooth, and there is comparatively thick column crystal commissure, but grain growth is not strong, and butt joint performance has no significant effect.
Interventions Requested: Cu-CuCrZr electro-beam welding joint hot strength detects
Performance: joint tensile strength is 327.9MPa, fracture position is copper side mother metal.
Claims (2)
1. an electron beam welding preparation method for CuW/Cu/CuCrZr integral contact, is characterized in that described contact side mother metal is CuW/Cu, opposite side mother metal is CuCrZr, carries out according to following steps:
(1) adopt sintering method to connect and make contact side mother metal CuW/Cu;
(2) CuW/Cu and the CuCrZr of sintering processes is directly carried out electron beam welding, solder side is Cu and CuCrZr, welding point is flat banjo fixing butt jointing, play movement amount is 0, do not fill welding filling material, electron beam welding employing and contact axis are the weld seam of miter angle, and postwelding is without the need to heat-treating; Welding parameter scope is as follows:
Rising gradient: 10s,
Downward gradient: 15s,
Rotary speed: 4r/m,
Weld interval: 16s,
Filament: 19.0-20.0A,
Focus on: 330-350mA,
Welding line: 120-125mA;
High pressure: 85Kv,
Bias voltage: 705-725V,
Scanning: X50mA, Y50mA,
Frequency: 500Hz.
2. according to the electron beam welding preparation method of a kind of CuW/Cu/CuCrZr integral contact according to claim 1, it is characterized in that described employing sintering method connects and make electrical contact side mother metal CuW/Cu, be specially: first pure W alloy powder is inserted in mould, then applying 100-120MPa static pressure makes alloyed powder closely knit, the Cu of 1.5 times of W volume parts is placed on closely knit W alloy powder again and heats, heating-up temperature is for reaching 1100-1120 DEG C, Cu is melted, when being heated to Cu fusion temperature, Cu fusing also flows full W alloy block along alloyed powder space, remaining liquid Cu is distributed on W alloy block, namely the firm sintered joint of CuW/Cu is formed after cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510426821.6A CN105057873A (en) | 2015-07-20 | 2015-07-20 | Method for preparing CuW/Cu/CuCrZr integrated contact through electron beam welding |
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| CN201510426821.6A CN105057873A (en) | 2015-07-20 | 2015-07-20 | Method for preparing CuW/Cu/CuCrZr integrated contact through electron beam welding |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105728929A (en) * | 2016-04-21 | 2016-07-06 | 长沙众聚达精密机械有限公司 | Nanometer diffusion bonding method for Cu and CuCrZr alloy |
| CN105965024A (en) * | 2016-06-08 | 2016-09-28 | 西安理工大学 | Method for liquid-phase connection of CuW material and CuCr material through high-entropy alloy |
| CN106270533A (en) * | 2016-09-09 | 2017-01-04 | 西安理工大学 | A kind of preparation method of the CuW/CuCr of high interfacial bonding strength |
| CN106925570A (en) * | 2017-02-24 | 2017-07-07 | 福达合金材料股份有限公司 | A kind of method that use electron beam removes soil for electrical contact working face ester impurities |
| CN114309910A (en) * | 2021-12-31 | 2022-04-12 | 浙江工业大学 | Electron beam welding process and postweld heat treatment method for copper-chromium-zirconium alloy |
| CN117884637A (en) * | 2024-03-12 | 2024-04-16 | 西安理工大学 | Forming method of metal hydride and high-vacuum cooperative oxygen control integral contact and contact |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105728929A (en) * | 2016-04-21 | 2016-07-06 | 长沙众聚达精密机械有限公司 | Nanometer diffusion bonding method for Cu and CuCrZr alloy |
| CN105728929B (en) * | 2016-04-21 | 2018-07-24 | 长沙众聚达精密机械有限公司 | The nanodiffusion connection method of Cu and CuCrZr alloys |
| CN105965024A (en) * | 2016-06-08 | 2016-09-28 | 西安理工大学 | Method for liquid-phase connection of CuW material and CuCr material through high-entropy alloy |
| CN105965024B (en) * | 2016-06-08 | 2018-05-29 | 西安理工大学 | A kind of method that high-entropy alloy connects CuW and CuCr materials for liquid phase |
| CN106270533A (en) * | 2016-09-09 | 2017-01-04 | 西安理工大学 | A kind of preparation method of the CuW/CuCr of high interfacial bonding strength |
| CN106925570A (en) * | 2017-02-24 | 2017-07-07 | 福达合金材料股份有限公司 | A kind of method that use electron beam removes soil for electrical contact working face ester impurities |
| CN114309910A (en) * | 2021-12-31 | 2022-04-12 | 浙江工业大学 | Electron beam welding process and postweld heat treatment method for copper-chromium-zirconium alloy |
| CN117884637A (en) * | 2024-03-12 | 2024-04-16 | 西安理工大学 | Forming method of metal hydride and high-vacuum cooperative oxygen control integral contact and contact |
| CN117884637B (en) * | 2024-03-12 | 2024-05-28 | 西安理工大学 | Forming method of metal hydride and high-vacuum cooperative oxygen control integral contact and contact |
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Application publication date: 20151118 |