CN104550311B - A kind of method for producing Niobium Superconducting tubing - Google Patents
A kind of method for producing Niobium Superconducting tubing Download PDFInfo
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- CN104550311B CN104550311B CN201410734297.4A CN201410734297A CN104550311B CN 104550311 B CN104550311 B CN 104550311B CN 201410734297 A CN201410734297 A CN 201410734297A CN 104550311 B CN104550311 B CN 104550311B
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- tubing
- niobium
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- pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
Abstract
The present invention relates to a kind of method for producing Niobium Superconducting tubing.It is characterized in, comprises the following steps：Take columned High-purity Niobium ingot casting to be drilled, obtain hollow ingot, hollow ingot is extruded so as to obtain pipe at room temperature, then rolled pipe, that is, obtain finished product niobium tubing.Pressure processing mode present invention employs " room temperature forward extrusion+tube rolling " realizes production of the superconducting accelerator with pure niobium tubing, process is simple and be not required to make frock on the premise of, the High-purity Niobium tubing of RRR value >=300 can be processed.The present invention uses room temperature forward extrusion method extrusion tube blank, material temperature rise degree in extrusion process is controlled by controlling extrusion speed, it is possible to prevente effectively from RRR value heavy losses；The finished product tubing that dimensional accuracy is high, ovality is small can be produced using many roll tube rolling mills.
Description
Technical field
The present invention relates to a kind of method for producing Niobium Superconducting tubing.
Background technology
Superconducting accelerator is a complexity, the deep cooling low temperature charged particle acceleration equipment for condensing current new and high technology, is
Research Modem Nuclear Physics, the Main Means of high-energy physics, it has turned into current advanced particle accelerator technology, its critical component
Radio frequency Superconducting cavity LINAC has suitable huge market demand, and the developed country based on Germany, the U.S. and Japan makes great efforts
Carry out the research of radio frequency Superconducting cavity LINAC and promote its industrialization process.American plan set up it is contemplated that built up in 10 years, cost
It is 500,000,000 5 thousand ten thousand dollars of FRIB (isotopic ion source accelerator) device, the device can produce the supernova for existing only in blast
In rare isotope, will be used to study active force between proton and neutron, and can be obtained in material science and medical domain
Using.High-purity Niobium tubing makees the component materials of key in frequency Superconducting cavity LINAC.
The key parameter for characterizing superconducting accelerator High-purity Niobium tubing superconductivity is that (i.e. material is in 4.2K temperature for RRR values
Under residual resistivity), typically require RRR values more than 300, RRR values then tubing superconductivity more high it is better.And influenceed in processing
The principal element of High-purity Niobium tubing superconductivity is that temperature rise is higher in processing from ingot casting to the temperature rise degree in finished product process
Then the decay of RRR values is more serious, so, processing method is most important with the production of pure niobium tubing to superconducting accelerator.
At present, the global superconducting accelerator production technology of pure niobium tubing mainly has sheet material welding, backward extrusion method, forging
Reaming method and the class of deep drawing methods four, but in the presence of column defects：1) sheet material welding ensures sheet material glacing flatness, solder technology and circularity
Deng requiring higher, and need ingot casting first is worked into sheet material to be welded again, the production cycle is long；2) backward extrusion method sets to extruding
The precision prescribed of standby frock and lubricating system is very high, and finished product needs machining, and stock utilization is low；3) reaming method and depth are forged
Daraf(reciprocal of farad) has that stock utilization is low, production efficiency is slow and frock cost is high.And, four kinds of methods of the above are difficult to
DiameterBelow 50mm, wall thickness 3mm above tubing are produced.
The content of the invention
It is an object of the invention to provide a kind of method for producing Niobium Superconducting tubing, niobium pipe in process can be prevented effectively from
The heavy losses of material RRR values and significantly improve the utilization rate of material and the processing efficiency of product.
A kind of method for producing Niobium Superconducting tubing, it is particular in that, comprises the following steps：Take columned High-purity Niobium
Ingot casting is drilled, and obtains hollow ingot, and hollow ingot is extruded so as to obtain pipe at room temperature, is then rolled pipe
System, that is, obtain finished product niobium tubing.
Wherein pipe is first eliminated except the extrusion defect on pipe before being rolled using machining equipment or polissoir.
Detect that its RRR value should be more than 250 after wherein obtaining finished product niobium tubing.
Wherein pressing steps are specifically that hollow ingot is extruded with the extruder of 3500 tons or 1650 tons.
Pressure processing mode present invention employs " room temperature forward extrusion+tube rolling " realizes superconducting accelerator with pure niobium pipe
The production of material, process is simple and be not required to make frock on the premise of, the High-purity Niobium tubing of RRR value >=300 can be processed.This hair
Bright use room temperature forward extrusion method extrusion tube blank, material temperature rise degree in extrusion process is controlled by controlling extrusion speed, can be with
It is prevented effectively from RRR value heavy losses；The finished product tubing that dimensional accuracy is high, ovality is small can be produced using many roll tube rolling mills.This
Invention using simple pressure processing method, auxiliary mould, less demanding to equipment hydraulic pressure equally accurate need not be made, both can be with
Realize diameterThe processing of below 120mm, RRR value >=300 High-purity Niobium tubing, can improve stock utilization by 30% or so again
To more than 40%, while the inventive method can greatly improve the processing efficiency of product.
Specific embodiment
Embodiment 1：
TakeThe High-purity Niobium ingot casting of 250 × L0mm (cylindric) → (lathe or wire cutting are in ingot casting center drill diameter
The hole of 100mm) drilling100mm→250×The extruding of 100 × L0mm hollow ingots (hollow pipe ingot) → room temperature (reduces diameter
Mode) →130×98 × L1mm (size after extruding) extrusion tube blank → pipe surfaces externally and internally and pipe extrude scarce end to end
Sunken removal (lathe or polishing machine, sawing machine or wire cutting) →126×100 × L2mm pipes → tube rolling →120×
95 × L3mm production tubes → detection RRR values.
Can obtain the niobium tubing of big specification (130mm ＞ diameter ＞ 100mm) by this technique, and extrusion process+
Higher than other processing modes (being less than 35%), RRR values meet requirement to the lumber recovery (more than 40%) of the tubing of rolling process.
Embodiment 2：
Take155 × L0mm High-purity Niobiums ingot casting (cylindric) → drilling(lathe or wire cutting are in ingot casting center drill straight for 70mm
FootpathThe hole of 100mm) →155×70 × L0mm hollow ingots (hollow pipe ingot) → room temperature extruding (mode for reducing diameter) →95×Extrusion defect removes (car end to end for 69 × L1mm extrusion tube blanks (size after extruding) → pipe surfaces externally and internally and pipe
Bed or polishing machine, sawing machine or wire cutting) →94×70 × L2mm pipes → tube rolling → tube rolling (82 × 8 ＜ are managed
Wall thickness ＞ →67×6→54×5→52×4.5→)50 × 4 × L3mm production tubes → detection RRR values.
Can obtain the niobium tubing of middle specification (100mm ＞ diameter ＞ 30mm) by this technique, and extrusion process+roll
Higher than other processing modes (being less than 35%), RRR values meet requirement to the lumber recovery (more than 40%) of the tubing of operation processed.
Pressing steps use 3500 tons or 1650 tons of extruder in above-mentioned all embodiments.
Claims (4)
1. a kind of method for producing Niobium Superconducting tubing, it is characterised in that comprise the following steps：Columned High-purity Niobium ingot casting is taken to enter
Row drilling, obtains hollow ingot, and hollow ingot is extruded so as to obtain pipe at room temperature, is then rolled pipe, i.e.,
Obtain finished product niobium tubing.
2. a kind of method for producing Niobium Superconducting tubing as claimed in claim 1, it is characterised in that：Wherein pipe is being rolled
It is preceding first to be eliminated except the extrusion defect on pipe using machining equipment or polissoir.
3. a kind of method for producing Niobium Superconducting tubing as claimed in claim 1, it is characterised in that：Wherein obtain finished product niobium tubing
After detect that its RRR value should be more than 250.
4. a kind of method for producing Niobium Superconducting tubing as claimed in claim 1, it is characterised in that：Wherein pressing steps are specifically
Hollow ingot is extruded with the extruder of 3500 tons or 1650 tons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410734297.4A CN104550311B (en) | 2014-12-05 | 2014-12-05 | A kind of method for producing Niobium Superconducting tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410734297.4A CN104550311B (en) | 2014-12-05 | 2014-12-05 | A kind of method for producing Niobium Superconducting tubing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104550311A CN104550311A (en) | 2015-04-29 |
| CN104550311B true CN104550311B (en) | 2017-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410734297.4A Active CN104550311B (en) | 2014-12-05 | 2014-12-05 | A kind of method for producing Niobium Superconducting tubing |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108213109B (en) * | 2017-12-18 | 2019-10-29 | 北京有色金属研究总院 | A kind of preparation method of great diameter and long thin-walled niobium and niobium alloy tubing |
| CN111957761A (en) * | 2020-08-13 | 2020-11-20 | 中国科学院近代物理研究所 | Manufacturing method for multiple stretching forming of high-purity niobium tube for radio frequency superconducting cavity |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60199522A (en) * | 1984-03-22 | 1985-10-09 | Natl Res Inst For Metals | Manufacture of superconductive alloy wire |
| EP0198570B1 (en) * | 1985-01-22 | 1990-08-29 | Westinghouse Electric Corporation | Process for producing a thin-walled tubing from a zirconium-niobium alloy |
| RU2122254C1 (en) * | 1996-08-23 | 1998-11-20 | Государственный научный центр Российской Федерации Всероссийский научно-исследовательский институт неорганических материалов им.акад.А.А.Бочвара | Method for producing resistive-barrier copper tubes to manufacture superconductors and current-carrying parts around them |
| US6294738B1 (en) * | 1997-03-31 | 2001-09-25 | American Superconductor Corporation | Silver and silver alloy articles |
| JP4947384B2 (en) * | 2008-08-07 | 2012-06-06 | 大学共同利用機関法人 高エネルギー加速器研究機構 | Manufacturing method of superconducting high frequency acceleration cavity |
| CN103866244B (en) * | 2012-12-18 | 2017-04-19 | 宁夏东方钽业股份有限公司 | Niobium tubular target material and producing method thereof |
| CN103219459B (en) * | 2013-04-28 | 2015-12-09 | 宁夏东方钽业股份有限公司 | Niobium Superconducting pipe and preparation method thereof |
| CN103769427B (en) * | 2014-01-06 | 2015-10-28 | 山西太钢不锈钢股份有限公司 | A kind of pressing method of niobium pipe |
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