CN104889193A - Cu-Nb composite wire comprehensive performance improvement preparation method - Google Patents
Cu-Nb composite wire comprehensive performance improvement preparation method Download PDFInfo
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- CN104889193A CN104889193A CN201510207120.3A CN201510207120A CN104889193A CN 104889193 A CN104889193 A CN 104889193A CN 201510207120 A CN201510207120 A CN 201510207120A CN 104889193 A CN104889193 A CN 104889193A
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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
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
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Abstract
The invention relates to a Cu-Nb composite wire comprehensive performance improvement preparation method including the following steps: (1) a single Nb core Cu-Nb composite wire is prepared by assembling and other steps from one pure Cu pipe sleeve and one pure Nb bar; (2) the single Nb core Cu-Nb composite wire is divided into 55 equal parts, and a 55 Nb core Cu-Nb composite wire is prepared by assembling and other steps from the 55 equal parts and one pure Cu pipe sleeve; (3) a 55<2> Nb core Cu-Nb composite wire is prepared from the 55 Nb core Cu-Nb composite wire by repeating the step (2); (4) a 55<3> Nb core Cu-Nb composite wire is prepared from the 55<2> Nb core Cu-Nb composite wire by repeating the step (3); (5) the 55<3> Nb core Cu-Nb composite wire is divided into 85 equal parts, and a 85* 55<3> Nb core Cu-Nb composite wire is prepared by assembling and other steps from 85 equal parts of the 55<3> Nb core Cu-Nb composite wire, one pure Cu pipe sleeve, and one pure Cu bar; and (6) a 85<2>* 55<3> Nb core Cu-Nb composite wire is prepared by repeating the step (5) from the 85* 55<3> Nb core Cu-Nb composite wire. The Cu-Nb composite wire prepared by the method gives full play to the pure Cu high conductivity and multi-scale structure impact on performance, and weakens electrical conductivity reduction caused by the work hardening, so that the Cu-Nb composite wire well combine high conductivity and high strength.
Description
Technical field
The present invention relates to a kind of preparation method for improving Cu-Nb composite wire combination property.
Background technology
The Cu-Nb composite wire that bundle drawing method prepares, because taking into account high strength and excellent electric conductivity, has broad application prospects in fields such as high-intensity magnetic field construction, medical science and railway transportations.But the intensity of Cu-Nb composite wire and electric conductivity exist conflicting relation, often along with the decline of electric conductivity while improving the strength of materials, this contradictory relation has become Cu-Nb composite wire and has applied a limited key factor.
The nanofiber complex tissue formed after the high strength of Cu-Nb microcosmic composite wire, excellent electric conductivity and large deformation drawing and the Multi-scale model characteristic of matrix are closely related.At present, researcher has all over the world dropped into a large amount of man power and materials in experimental study and actual production, makes every effort to be optimized composite wire electric conductivity and intensity, to meet actual production demand.How to optimize the coupling of Cu-Nb composite wire intensity and electric conductivity further, can while acquisition good electric conductivity, significantly do not reduce wire strength again, this has become the critical problem that such composite wire needs solution badly.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method for improving Cu-Nb composite wire combination property, and not only preparation technology is simple, and realizes the reasonably optimizing to Cu-Nb composite property.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of preparation method for improving Cu-Nb composite wire combination property, comprises the following steps:
(1) 1 pure Cu pipe box is chosen first respectively and 1 pure Nb bar is assembled, pure Cu pipe box is set in outside pure Nb bar, described pure Nb bar is placed in the center of pure Cu pipe box, successively vacuum seal, hot extrusion operation are carried out to it, then carry out multi-pass cold drawing and obtain single Nb core Cu-Nb composite wire;
(2) the single Nb core Cu-Nb composite wire obtained in step (1) is divided into 55 equal portions along its length, and continue to choose 1 pure Cu pipe box and assemble, pure Cu pipe box is set in outside 55 equal portions list Nb core Cu-Nb composite wires, described 55 equal portions list Nb core Cu-Nb composite wires are arranged in column in pure Cu pipe box center, separately get pure Cu bar to fill after in the gap of pure Cu pipe box and 55 equal portions list Nb core Cu-Nb composite wires, successively vacuum seal, hot extrusion operation are carried out to it, then carry out multi-pass cold drawing acquisition 55Nb core Cu-Nb composite wire;
(3) operation that the 55Nb core Cu-Nb composite wire obtained in step (2) repeats in step (2) is obtained 55
2nb core Cu-Nb composite wire;
(4) will obtain in step (3) 55
2the operation that Nb core Cu-Nb composite wire repeats in step (3) obtains 55
3nb core Cu-Nb composite wire;
(5) will obtain in step (4) 55
3nb core Cu-Nb composite wire continues to be divided into 85 equal portions along its length, and 1 pure Cu pipe box is chosen in continuation respectively, 1 pure Cu bar is assembled, and pure Cu bar is placed in the circle centre position of pure Cu pipe box, by 85 equal portions 55
3nb core Cu-Nb composite wire is evenly arranged in pure Cu bar week side formation column, pure Cu pipe box is set in pure Cu bar, 85 equal portions 55
3outside Nb core Cu-Nb composite wire, and separately get pure Cu bar and fill pure Cu pipe box and pure Cu bar, 55
3after in the gap of Nb core Cu-Nb composite wire, successively vacuum seal, hot extrusion operation are carried out to it, then carry out multi-pass cold drawing acquisition 85 × 55
3nb core Cu-Nb composite wire;
(6) will obtain in step (5) 85 × 55
3the operation that Nb core Cu-Nb composite wire repeats in step (5) obtains 85
2× 55
3nb core Cu-Nb composite wire.
Further, the welding vacuum of described vacuum seal is greater than 5 × 10
-3pa, extrusion temperature is 550 ~ 650 DEG C, and drawing speed is 15mm/s, and every time deformation quantity controls below 20%, and the annealing temperature of the annealing process introduced in drawing process is 700 DEG C, and annealing time is 40 ~ 120min.
Further, the percentage by weight shared by Cu element in selected pure Cu pipe box and pure Cu bar be greater than shared by 99.9%, O element percentage by weight be less than or equal to 0.003%, shared by impurity percentage by weight be less than or equal to 0.05%; Nb element in selected pure Nb bar accounts for 99.9%, shared by impurity percentage by weight be less than or equal to 0.05%.
Further, in step (1), before pure Cu pipe box and pure Nb bar are assembled, first pure Cu pipe box and pure Nb bar are polished, pickling, straightening step, its surface clean; In step (2), before pure Cu pipe box and 55 equal portions list Nb core Cu-Nb composite wires are assembled, first pure Cu pipe box and single Nb core Cu-Nb composite wire are polished, pickling, straightening step, its surface clean; In step (5), to pure Cu pipe box, pure Cu bar and 85 equal portions 55
3before Nb core Cu-Nb composite wire is assembled, first to pure Cu pipe box, pure Cu bar and 85 equal portions 55
3nb core Cu-Nb composite wire carries out polishing, pickling, straightening step, its surface clean.
Further, in step (1), the length of described pure Cu pipe box and pure Nb bar is equal; In step (2), the length of described pure Cu pipe box and 55 equal portions list Nb core Cu-Nb composite wires is equal; In step (5), described pure Cu pipe box, pure Cu bar and 85 equal portions 55
3the length of Nb core Cu-Nb composite wire is equal.
Compared with prior art, the present invention has following beneficial effect: Cu-Nb composite wire prepared by this method, give full play to pure Cu high conductivity and Multi-scale model to the impact of performance, weaken the decline that work hardening causes electric conductivity simultaneously, make Cu-Nb composite wire have the good combination of high electrical conductivity and intensity.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
Accompanying drawing explanation
Fig. 1 is 85 × 55 of the embodiment of the present invention
3nb core Cu-Nb composite wire cross-sectional configuration schematic diagram.
Fig. 2 is 85 of the embodiment of the present invention
2× 55
3nb core Cu-Nb composite wire cross-sectional configuration schematic diagram.
Fig. 3 is the organigram of the embodiment of the present invention.
In figure: the pure Cu pipe box of 1-, 2-55
3nb core Cu-Nb composite wire, 3-85 × 55
3nb core Cu-Nb composite wire, the pure Cu bar in 4-center, the pure Cu bar in 5-gap.
Detailed description of the invention
In the present invention, as shown in Fig. 1 ~ 3, a kind of preparation method for improving Cu-Nb composite wire combination property, comprises the following steps:
(1) 1 pure Cu pipe box is chosen first respectively and 1 pure Nb bar is assembled, pure Cu pipe box is set in outside pure Nb bar, described pure Nb bar is placed in the center of pure Cu pipe box, successively vacuum seal, hot extrusion operation are carried out to it, then carry out multi-pass cold drawing and obtain single Nb core Cu-Nb composite wire;
(2) the single Nb core Cu-Nb composite wire obtained in step (1) is divided into 55 equal portions along its length, and continue to choose 1 pure Cu pipe box and assemble, pure Cu pipe box is set in outside 55 equal portions list Nb core Cu-Nb composite wires, described 55 equal portions list Nb core Cu-Nb composite wires are arranged in column in pure Cu pipe box center, described column is orthohexagonal cellular in entirety, separately get gap pure Cu bar to fill after in the gap of pure Cu pipe box and 55 equal portions list Nb core Cu-Nb composite wires, this gap pure Cu bar is pure Cu bar, successively vacuum seal is carried out to it, hot extrusion operation, carry out multi-pass cold drawing again and obtain 55Nb core Cu-Nb composite wire,
(3) operation that the 55Nb core Cu-Nb composite wire obtained in step (2) repeats in step (2) is obtained 55
2nb core Cu-Nb composite wire;
(4) will obtain in step (3) 55
2the operation that Nb core Cu-Nb composite wire repeats in step (3) obtains 55
3nb core Cu-Nb composite wire;
(5) will obtain in step (4) 55
3nb core Cu-Nb composite wire continues to be divided into 85 equal portions along its length, and 1 pure Cu pipe box is chosen in continuation respectively, 1 pure Cu bar is assembled, and pure Cu bar is placed in the circle centre position of pure Cu pipe box, by 85 equal portions 55
3nb core Cu-Nb composite wire is evenly arranged in pure Cu bar week side formation column, and pure Cu pipe box in orthohexagonal cellular, is set in pure Cu bar, 85 equal portions 55 in overall by described column
3outside Nb core Cu-Nb composite wire, and separately get gap pure Cu bar and fill pure Cu pipe box and pure Cu bar, 55
3after in the gap of Nb core Cu-Nb composite wire, this gap pure Cu bar is pure Cu bar, carries out vacuum seal, hot extrusion operation successively to it, then carries out multi-pass cold drawing acquisition 85 × 55
3nb core Cu-Nb composite wire;
(6) will obtain in step (5) 85 × 55
3the operation that Nb core Cu-Nb composite wire repeats in step (5) obtains 85
2× 55
3nb core Cu-Nb composite wire.
In the present invention, the welding vacuum of described vacuum seal is greater than 5 × 10
-3pa, extrusion temperature is 550 ~ 650 DEG C, and drawing speed is 15mm/s, and every time deformation quantity controls below 20%, and the annealing temperature of the annealing process introduced in drawing process is 700 DEG C, and annealing time is 40 ~ 120min.
In the present invention, the percentage by weight shared by Cu element in selected pure Cu pipe box and pure Cu bar be greater than shared by 99.9%, O element percentage by weight be less than or equal to 0.003%, shared by impurity percentage by weight be less than or equal to 0.05%; Nb element in selected pure Nb bar accounts for 99.9%, shared by impurity percentage by weight be less than or equal to 0.05%.
In the present invention, in step (1), before pure Cu pipe box and pure Nb bar are assembled, first pure Cu pipe box and pure Nb bar are polished, pickling, straightening step, its surface clean; In step (2), before pure Cu pipe box and 55 equal portions list Nb core Cu-Nb composite wires are assembled, first pure Cu pipe box and single Nb core Cu-Nb composite wire are polished, pickling, straightening step, its surface clean; In step (5), to pure Cu pipe box, pure Cu bar and 85 equal portions 55
nbefore Nb core Cu-Nb composite wire is assembled, first to pure Cu pipe box, pure Cu bar and 85 equal portions 55
3nb core Cu-Nb composite wire carries out polishing, pickling, straightening step, its surface clean, that is, before each assembling, all need to carry out to polish, pickling, straightening step, cleaning material surface.
In the present invention, in step (1), the length of described pure Cu pipe box and pure Nb bar is equal; In step (2), the length of described pure Cu pipe box and 55 equal portions list Nb core Cu-Nb composite wires is equal; In step (5), described pure Cu pipe box, pure Cu bar and 85 equal portions 55
3the length of Nb core Cu-Nb composite wire is equal, and that is, before each assembling, assembled length component is all equal.
In the present invention, 1 pure Cu pipe box center put into by 1 pure Nb bar, and carry out electron beam vacuum seal, welding booth's vacuum is 5 × 10
-3more than Pa; Then carry out hot extrusion along DD direction, in the accompanying drawings, direction DD represents drawing or the direction of extrusion, the directive uniqueness of direction DD tool, and direction DD * represents the opposite direction of drawing or direction of extrusion DD, and direction TD represents transverse direction or the hoop of material; Extrusion temperature is in 550 ~ 650 DEG C; Last along the multi-pass cold drawing of DD direction, every time drawing deformation amount is about 20%, and speed is 15mm/s, adopts cross section to be regular hexagon mould when finally carrying out a drawing, obtaining single Nb core Cu-Nb composite wire cross section is regular hexagon, and the length of side is 3.20mm; Carry out 3 times according to above-mentioned process recycle, can obtain containing 55
3the Cu-Nb composite wire of root Nb core, namely 55
3nb core Cu-Nb composite wire; Get above-mentioned 85 above-mentioned 55
3nb core Cu-Nb composite wire, 1 pure Cu pipe box and 1 pure Cu bar, then carry out jacket assembling, and make pure Cu bar be in centre, carry out electron beam vacuum seal, welding booth's vacuum is 5 × 10
-3more than Pa; Then carry out hot extrusion along DD direction, extrusion temperature is in 550 ~ 650 DEG C; Last along the multi-pass cold drawing of DD direction, every time drawing deformation amount is about 20%, and speed is 15mm/s, adopts cross section to be regular hexagon mould, obtain 85 × 55 when finally carrying out a drawing
3the cross section of Nb core Cu-Nb composite wire is regular hexagon; The above-mentioned technical process that circulates 1 time, finally obtains 85
2× 55
3the Cu-Nb composite wire of Nb core.
When pure Cu diameter of rod is 12.0 mm, now 85
2× 55
3the inner Nb content of Cu-Nb composite wire of Nb core is 28.4%, 85
2× 55
3in Nb core, single Nb core width reaches 78 nm, and tensile strength reaches 860 Mpa, conductance 73% IACS; When pure Cu diameter of rod is 18.0 mm, 85
2× 55
3the inner Nb content of Cu-Nb composite wire of Nb core is 24.2%, 85
2× 55
3in Nb core, single Nb core width reaches 62 nm, and tensile strength reaches 920 Mpa, conductance 80% IACS.
As can be seen from above-mentioned technical scheme and performance, preparation method provided by the invention, by adding the pure Cu bar in extra center and increase composite assembling quantity in follow-up assembling, make in following process process, ensure Nb phase content and size and studies have reported that quite level when, material conductivity does not decline with work hardening, even be improved, ensure that the intensity that material is higher simultaneously, thus the contradictory relation alleviated between intensity and electric conductivity, achieve the reasonably optimizing to Cu-Nb composite property.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (5)
1. for improving a preparation method for Cu-Nb composite wire combination property, it is characterized in that, comprising the following steps:
(1) 1 pure Cu pipe box is chosen first respectively and 1 pure Nb bar is assembled, pure Cu pipe box is set in outside pure Nb bar, described pure Nb bar is placed in the center of pure Cu pipe box, successively vacuum seal, hot extrusion operation are carried out to it, then carry out multi-pass cold drawing and obtain single Nb core Cu-Nb composite wire;
(2) the single Nb core Cu-Nb composite wire obtained in step (1) is divided into 55 equal portions along its length, and continue to choose 1 pure Cu pipe box and assemble, pure Cu pipe box is set in outside 55 equal portions list Nb core Cu-Nb composite wires, described 55 equal portions list Nb core Cu-Nb composite wires are arranged in column in pure Cu pipe box center, separately get pure Cu bar to be filled in after in the gap of pure Cu pipe box and 55 equal portions list Nb core Cu-Nb composite wires, successively vacuum seal, hot extrusion operation are carried out to it, then carry out multi-pass cold drawing acquisition 55Nb core Cu-Nb composite wire;
(3) operation that the 55Nb core Cu-Nb composite wire obtained in step (2) repeats in step (2) is obtained 55
2nb core Cu-Nb composite wire;
(4) will obtain in step (3) 55
2the operation that Nb core Cu-Nb composite wire repeats in step (3) obtains 55
3nb core Cu-Nb composite wire;
(5) will obtain in step (4) 55
3nb core Cu-Nb composite wire continues to be divided into 85 equal portions along its length, and 1 pure Cu pipe box is chosen in continuation respectively, 1 pure Cu bar is assembled, and pure Cu bar is placed in the circle centre position of pure Cu pipe box, by 85 equal portions 55
3nb core Cu-Nb composite wire is evenly arranged in pure Cu bar week side formation column, pure Cu pipe box is set in pure Cu bar, 85 equal portions 55
3outside Nb core Cu-Nb composite wire, and separately get pure Cu bar and be filled in pure Cu pipe box and pure Cu bar, 55
3after in the gap of Nb core Cu-Nb composite wire, successively vacuum seal, hot extrusion operation are carried out to it, then carry out multi-pass cold drawing acquisition 85 × 55
3nb core Cu-Nb composite wire;
(6) will obtain in step (5) 85 × 55
3the operation that Nb core Cu-Nb composite wire repeats in step (5) obtains 85
2× 55
3nb core Cu-Nb composite wire.
2. a kind of preparation method for improving Cu-Nb composite wire combination property according to claim 1, is characterized in that: the welding vacuum of described vacuum seal is greater than 5 × 10
-3pa, extrusion temperature is 550 ~ 650 DEG C, and drawing speed is 15mm/s, and every time deformation quantity controls below 20%, and the annealing temperature of the annealing process introduced in drawing process is 700 DEG C, and annealing time is 40 ~ 120min.
3. a kind of preparation method for improving Cu-Nb composite wire combination property according to claim 2, it is characterized in that: the percentage by weight shared by Cu element in selected pure Cu pipe box and pure Cu bar is greater than 99.9%, shared by O element percentage by weight be less than or equal to 0.003%, shared by impurity percentage by weight be less than or equal to 0.05%; Nb element in selected pure Nb bar accounts for 99.9%, shared by impurity percentage by weight be less than or equal to 0.05%.
4. a kind of preparation method for improving Cu-Nb composite wire combination property according to claim 3, it is characterized in that: in step (1), before pure Cu pipe box and pure Nb bar are assembled, first pure Cu pipe box and pure Nb bar are polished, pickling, straightening step, its surface clean; In step (2), before pure Cu pipe box and 55 equal portions list Nb core Cu-Nb composite wires are assembled, first pure Cu pipe box and single Nb core Cu-Nb composite wire are polished, pickling, straightening step, its surface clean; In step (5), to pure Cu pipe box, pure Cu bar and 85 equal portions 55
3before Nb core Cu-Nb composite wire is assembled, first to pure Cu pipe box, pure Cu bar and 85 equal portions 55
3nb core Cu-Nb composite wire carries out polishing, pickling, straightening step, its surface clean.
5. a kind of preparation method for improving Cu-Nb composite wire combination property according to claim 4, is characterized in that: in step (1), and the length of described pure Cu pipe box and pure Nb bar is equal; In step (2), the length of described pure Cu pipe box and 55 equal portions list Nb core Cu-Nb composite wires is equal; In step (5), described pure Cu pipe box, pure Cu bar and 85 equal portions 55
3the length of Nb core Cu-Nb composite wire is equal.
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| CN106881372A (en) * | 2017-01-23 | 2017-06-23 | 北京航空航天大学 | A kind of preparation method of high alumina zinc-aluminium puppet alloy bar material and silk material |
| CN107170526A (en) * | 2017-04-28 | 2017-09-15 | 西部超导材料科技股份有限公司 | The preparation method of the tin superconducting wire timber-used copper niobium compound bar of high critical current densities niobium three |
| CN107904389A (en) * | 2017-11-20 | 2018-04-13 | 福州大学 | A kind of method for annealing of copper niobium composite wire |
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| CN107170526A (en) * | 2017-04-28 | 2017-09-15 | 西部超导材料科技股份有限公司 | The preparation method of the tin superconducting wire timber-used copper niobium compound bar of high critical current densities niobium three |
| CN107170526B (en) * | 2017-04-28 | 2020-03-27 | 西部超导材料科技股份有限公司 | Preparation method of copper-niobium composite rod for high critical current density niobium-tin superconducting wire |
| CN107904389A (en) * | 2017-11-20 | 2018-04-13 | 福州大学 | A kind of method for annealing of copper niobium composite wire |
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|---|---|
| CN104889193B (en) | 2017-08-25 |
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