CN85109182B - Diffusion welding method and device for superconducting tape (wire) - Google Patents
Diffusion welding method and device for superconducting tape (wire) Download PDFInfo
- Publication number
- CN85109182B CN85109182B CN85109182A CN85109182A CN85109182B CN 85109182 B CN85109182 B CN 85109182B CN 85109182 A CN85109182 A CN 85109182A CN 85109182 A CN85109182 A CN 85109182A CN 85109182 B CN85109182 B CN 85109182B
- Authority
- CN
- China
- Prior art keywords
- welding
- superconducting
- welding method
- superconduction
- heating plate
- 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.)
- Expired
Links
- 238000003466 welding Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000009792 diffusion process Methods 0.000 title claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 238000007747 plating Methods 0.000 claims description 2
- 239000003870 refractory metal Substances 0.000 claims description 2
- 230000014759 maintenance of location Effects 0.000 claims 1
- 239000007769 metal material Substances 0.000 claims 1
- 239000010955 niobium Substances 0.000 abstract 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract 1
- 229910052758 niobium Inorganic materials 0.000 abstract 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 8
- 239000001307 helium Substances 0.000 description 6
- 229910052734 helium Inorganic materials 0.000 description 6
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 229910000679 solder Inorganic materials 0.000 description 5
- 229910020012 Nb—Ti Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- 239000002887 superconductor Substances 0.000 description 3
- 238000005481 NMR spectroscopy Methods 0.000 description 2
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Images
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
A method for welding superconducting tapes (wires) and a device used by the method belong to the technical field of superconduction. The invention adopts vacuum high-temperature pressurization short-time diffusion welding. The parts to be welded of superconducting tapes (wires) such as niobium, tin, and the like are mutually lapped after certain treatment, placed in a welding fixture and pressurized by 5-10 kg/cm２At 10－４Heating to 950 deg.c in vacuum. The diffusion is carried out for several minutes, so that the superconducting materials at the lap joint are mutually diffused together, and the purpose of superconducting connection is achieved. The resistance of the welding spot welded by the method is less than 5 multiplied by 10－１４Omega, full critical current density greater than 3 x 10４Ａ／ｃｍ２And has been made into a plurality of high-stability Nb with field strength of 8 Tesla３And the Sn superconducting magnet.
Description
The invention belongs to the superconductor welding technology field
Because superconducting magnet has physical characteristics such as upper critical magnetic field, high critical current densities, D.C. resistance equal zero, people have made that volume is little, field intensity is high, the various laboratories superconducting magnet of consumed power not.And modern technologies are had higher requirement to superconducting magnet.As the nuclear magnetic resonance chemical analyser magnet, not only require high field intensity and high evenness, the requirement of high stability has more been proposed.For example: the Nb-Ti nmr magnet of a field intensity 7T, should be for reaching high stability requirement magnet resistance less than 10
-12Ω.Magnet needs to make with tens thousand of rice noodles materials, and about long 1 km of general superconduction band (line) material, this just needs a kind of welding method that many bands (line) material is coupled together.In magnet technology, the superconduction of single core and multicore Nb-Ti line welding has several method at present.As described in document (1).But Nb
3The superconduction solder technology of Sn band (line) material is still unresolved.Adopt indium to make the common method for welding of scolder at present in the low temperature field, the resistance of its welding point is 10
-7-10
-8Ω can not meet the demands far away.And Nb
3The Sn magnet can produce higher field intensity, can reach 12T, thereby improves the level of nuclear magnetic resonance spectrometer greatly.Thereby Nb
3The solution of the superconduction welding method of Sn band (line) material is an important techniques problem.This is a main cause of the present invention.
Second reason of the present invention is that the superconducting magnet that the laboratory is used is worked in liquid helium, needs to lead to from magnet the current feed of room temperature power supply, thereby the Joule heat that the resistance partly of the normal conductor on the lead-in wire produces becomes the main source that consumes liquid helium.Adopt superconductor technology can form the full superconduction closed loop mode work of magnet itself.When removing the external power electric current gradually, electric current progresses into full superconduction closed-loop path, forms stable closed current circulation, because connection resistance is almost nil, thus can keep the magnetic field of high stability for a long time, particularly important for this point of magnet of long-term operation.Owing to eliminated the liquid helium loss that Joule heat brings, thereby improved the utilization rate of liquid helium greatly, reduced the magnet running expense.
The document that reflects this technology:
（1）Cryogenics 1974，Vol.14，NO.9.518-519
(2) clear 58-74291
(3) clear 58-128281
Document (1) has been introduced the welding method more than 50 strands Nb-Ti superconducting line.The pulsating welder that adopts I, a P, G, J to make has been reequiped soldering tip and has been increased an inert gas installation, removes the copper base, cleans filament, is placed on spot welding on the Nb-Ti paper tinsel method with etch.
What document (2), (3) were introduced is to make certain special steel joint with vacuum diffusion welding method.
The objective of the invention is to propose a kind of Nb of vacuum diffusion welding method welding random length
2Sn superconduction band (line) material, compared with the prior art it make Nb
2The welding point resistance of Sn superconduction band (line) material is without hindrance by there being resistance to become, thereby the magnetic field that can keep high stability for a long time, sets up the magnet of long-term operation, has also eliminated the liquid helium loss that Joule heat brings simultaneously.As Nb
3The superconduction welding of Sn superconduction band (line) material requires the connection resistance of welding less than 1 * 10 according to practicality
-12Ω, full critical current density is greater than 2 * 10 under zero magnetic field
4A/cm
2, be suitable for the coiling magnet.
Accompanying drawing is the weld jig structural representation, in conjunction with the accompanying drawings, welding method of the present invention and weld jig thereof is described.Weld jig is made up of alumina tube (1), flute profile alumina wafer (2) and butterfly heating plate (3), and it is a kind of weld jig of energy pressurized, heated.Welding position (4) is drawn by the direction of vertical drawing.The butterfly heating plate is to make with refractory metal, can be tungsten, molybdenum, tantalum etc., and heating plate contacts along the flute profile alumina wafer, welding position, plane is produced than even temperature, and heating-cooling is rapid, and the elastic construction form that it is special is beneficial to the loading, unloading of welding material especially.Flute profile alumina wafer (2) separates heating plate (3) with welding material, form indirect, can avoid like this that the welding position causes adhesion with the METAL HEATING PROCESS sheet in the welding process, otherwise damages solder joint, and heating plate (3) also can not be reused.Alumina tube (1) plays insulation and bears pressure.Weld jig that can pressurized, heated shown in the drawings has guaranteed the repetition, stable, reliable of welding condition.
Welding method of the present invention is to realize like this.(chemical attack can be FeCl with the chemical method corrosion with soldered superconduction band (line) material end surface copper layer
3Or HNO
3) expose about 1 centimetre original tape, take the lead to overlap mutually with two then, place a pair of flute profile alumina wafer (2) centre position, promptly welding material is pressurized on the welding position (4) by alumina tube (1) perpendicular to drawing, and pressure is 5-10Kg/cm
2When vacuum reaches 10
-4When torr was above, electric current was given birth to heat through heating plate (3), and heat is heated soldered position through alumina wafer (2) indirectly, is warmed to about 950 ℃.The purpose of indirect is to avoid welding material to contact with heating plate to cause unnecessary adhesion.The welding of finishing a non-resistance solder joint was generally 5-10 minute.To weld good material subsequently and take out vacuum chamber, carry out copper plating treatment, stable in order to the superconducting characteristic of solder joint.
The requirement of magnet manufacturing technology has been satisfied in the superconduction welding of adopting the present invention to carry out; The welding point of making detects connection resistance＜5 * 10 through the follow current method
-14Ω, and made the high stability Nb that a plurality of field intensity are 8 teslas
3The Sn superconducting magnet; Method of the present invention can continuous welding after the start, contact of weldering about half an hour, the solder joint success rate is absolutely, can weld the superconductor belt of random length easily, therefore be reliably, a kind of novel welding method that efficient is high.The superconducting magnet that the laboratory is used uses method of the present invention to form superconducting joint, forms the superconduction closed circulation, reduces liquid helium consumption, thereby reduces experiment fees, reduces expenses, and this is all having significance aspect science and technology development and the economic benefit two.
Embodiment one
The inventive method has been used for the long homemade Nb of 800-1000 rice
3The superconductivity of Sn band detects, earlier Nb
3FeCl is put at the position that the Sn band will weld
3Corrode in the solution, rapidly the band of handling well will be overlapped in weldering place, put into the vacuum chamber weld jig, the sealed vacuum chamber.When vacuum reaches 2-5 * 10
-5Torr, be heated to about 950 ℃.7-10Kg/cm pressurizes on by scolder
2Can obtain intact pad in heating after 5 minutes.After band (line) material takes out vacuum chamber, copper facing again.The method has been used for nearly hundred homemade Nb
3The superconductivity of Sn band detects.
Claims (3)
1, a kind of metal material does not attach the vacuum diffusion welding method of material, it is characterized in that a kind of high-temperature vacuum diffusion welding method can weld the Nb of random length
3Sn superconduction band (line) material.
2, vacuum diffusion welding method according to claim 1 is characterized in that the welding position should impose 5-10Kg/cm
2Pressure and vacuum 10
-4When torr is above, heat about 950 ℃, temperature retention time 5-10 minute, superconduction band (line) material that welding is good must be through copper plating treatment.
3, vacuum diffusion welding method according to claim 1 is characterized in that the anchor clamps that weld superconduction band (line) material are made up of alumina tube (1), flute profile alumina wafer (2) and butterfly heating plate (3).Heating plate (3) is made by refractory metal.Pressure is delivered on the welding position by alumina tube (1), heating plate (3) and alumina wafer (2); Temperature is delivered on the welding position by heating plate (3), alumina wafer (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85109182A CN85109182B (en) | 1985-12-20 | 1985-12-20 | Diffusion welding method and device for superconducting tape (wire) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85109182A CN85109182B (en) | 1985-12-20 | 1985-12-20 | Diffusion welding method and device for superconducting tape (wire) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85109182A CN85109182A (en) | 1987-06-24 |
| CN85109182B true CN85109182B (en) | 1988-03-02 |
Family
ID=4796265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85109182A Expired CN85109182B (en) | 1985-12-20 | 1985-12-20 | Diffusion welding method and device for superconducting tape (wire) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85109182B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568705A (en) * | 2012-01-05 | 2012-07-11 | 中国科学院合肥物质科学研究院 | Producing method of niobium three stannum cable-in-conduit conductors of large superconducting magnets |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888026B (en) * | 2010-06-30 | 2012-07-18 | 中国科学院电工研究所 | A Bronze Technology Nb3Sn Superconductor Multi-core Wire Connector |
| CN104671818B (en) * | 2014-12-19 | 2017-03-15 | 上海大学 | Diffusion welding (DW) silver layer connects YBCO high-temperature superconducting thin film band techniques |
| CN114619131B (en) * | 2021-09-24 | 2023-03-31 | 上海交通大学 | Solderless welding joint and welding manufacturing method thereof |
-
1985
- 1985-12-20 CN CN85109182A patent/CN85109182B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568705A (en) * | 2012-01-05 | 2012-07-11 | 中国科学院合肥物质科学研究院 | Producing method of niobium three stannum cable-in-conduit conductors of large superconducting magnets |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85109182A (en) | 1987-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101075496B (en) | A joint between double cake coils of a high temperature superconducting magnet and its welding method | |
| CN105593954B (en) | Including constituting the HTSL tape conductors of joint and the magnet exciting coil device of LTS metal wires | |
| Usoskin et al. | Large area YBCO-coated stainless steel tapes with high critical currents | |
| CN110181138A (en) | The welding procedure of superconductive cable and boxlike copper sleeve in large high-temperature superconductive current lead | |
| CN85109182B (en) | Diffusion welding method and device for superconducting tape (wire) | |
| JP5115778B2 (en) | Superconducting cable | |
| CA1236540A (en) | Method and apparatus for providing extremely low- resistance connection between the end sections of two superconductors | |
| CN103855586B (en) | A kind of preparation method of Bi-2212 wire rod superconducting joint | |
| CN208262072U (en) | A kind of welder of high-temperature superconductor band connector | |
| CN108453361A (en) | A kind of welder and its welding method of high-temperature superconductor band connector | |
| JPH0737444A (en) | Oxide superconducting conductor and method for manufacturing the same | |
| CN108106935A (en) | A kind of critical performance testing device of superconducting line axial strain | |
| US5019247A (en) | Pulsed magnet system | |
| US5148137A (en) | Containment vessel for use with a pulsed magnet system and method of manufacturing same | |
| Herd et al. | Development and fabrication of a Bi-2223 racetrack coil for generator applications | |
| JPH10284152A (en) | Connection method of superconducting conductor | |
| CN102103904A (en) | Superconducting conductor and method for producing a superconducting electric conductor | |
| JPH065345A (en) | Different kind superconducting wire connecting method | |
| CN110034474A (en) | Superconductive cable wire bonding auxiliary device | |
| CN110136913A (en) | A superconducting magnet based on a "D" ring piece and an apparatus and method using the same | |
| CN111243819B (en) | A kind of superconducting joint of NbTi and Nb3Sn superconducting wire and preparation method thereof | |
| Johnson et al. | Beryllium windows joined by electroplating | |
| Meshchanov et al. | The manufacture of corrugated copper tubes with a Nb 3 Sn layer | |
| Kim et al. | Further tests of the Argonne 3.3-MJ pulsed superconducting coil and its nonmetallic cryostat | |
| Roeterdink et al. | Design and construction of the ECN 12 T niobium tin magnet insert for the SULTAN facility |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |