CN102168201A - Short-flow preparation method for Cu-Nb composite material - Google Patents
Short-flow preparation method for Cu-Nb composite material Download PDFInfo
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Abstract
The invention discloses a short-flow preparation method for a Cu-Nb composite material. The method comprises the following steps of: drawing a Cu/Nb single core wire, straightening, and performing fixed-length cutting; acid-washing, dehydrating and drying an oxygen-free copper tube and the Cu/Nb single core wire; assembling the Cu/Nb single core wire into the oxygen-free copper tube to obtain a primary composite rod; drawing the primary composite rod, straightening, and performing fixed-length cutting to obtain a composite wire; acid-washing, dehydrating and drying the composite wire and another oxygen-free copper tube; assembling the composite wire into the oxygen-free copper tube to obtain a secondary composite rod; and repeatedly processing the secondary composite rod twice according to the processing method of the primary composite rod twice, and drawing until the secondary composite rod has a final size to obtain the Cu-Nb composite material. In the method, the process is simple, and the preparation period is short; and the prepared Cu-Nb composite material has the characteristics of high strength, high electric conductivity, steady performance and strong practicability, can meet the need of pulse magnets, and can be applied to the field of pulsed magnetic fields.
Description
Technical field
The invention belongs to the metal-base composites preparing technical field, be specifically related to a kind of short process making method of Cu-Nb matrix material.
Background technology
Take into account the Cu-base composites that high strength, high electricity lead and be applied to nondestructive impulse magnetic field field.The high field condition operation of magnet more than 60T requires magnet coiling material to have high electricity and leads to reduce joule heating effect, needs conductor material to have high strength simultaneously and bears the huge Lorentz force that magnet coil is subjected to.The carbon/carbon-copper composite material that with Cu-Nb is representative has higher electric conductivity and tensile strength in all kinds of conductor materials, by the consistent conductor material of thinking most possibly to realize the 100T impulse magnetic field of magnet expert.
At present, the technology of preparing of Cu-Nb matrix material mainly is to adopt in-situ method and boundling hubbing.The in-situ method preparation process mainly is by induction melting and consumable arc-melting prepared Cu-Nb alloy cast ingot, then with the hot extrusion of alloy pig process, processing such as cold rolling or cold drawing, thereby obtain Cu-Nb microcosmic composite wire, wherein Nb exists with small and dispersed dendrite form in matrix material, plays discontinuous reinforcement enhancement.This technology of preparing may cause the copper matrix to pollute owing to may cause the ununiformity that Nb distributes in the ingot casting in the alloy casting process, and discontinuous Nb whisker also may form the conductive path that causes discontinuity in the material in the matrix material, influences material electroconductibility.The boundling Hubbing method is present international main flow preparation method, and the boundling jacket assembling by repeatedly, hot extrusion and drawing process process realize the refinement of Nb core, obtains Nb continuous core silk reinforced composite, has the excellent strength of materials and electroconductibility.Yet this method preparation cycle is long, cost is higher, is unfavorable for suitability for industrialized production.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned the deficiencies in the prior art, provides a kind of technology simple, the short process making method of the Cu-Nb matrix material that preparation cycle is short.Method of the present invention can make the Nb fiber in the Cu-Nb matrix material keep continuous, even, and the matrix material of preparation has high strength, good conductivity, stable performance and practical characteristics, can satisfy the pulse magnet needs.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of short process making method of Cu-Nb matrix material is characterized in that this method may further comprise the steps:
(1) the Cu/Nb single-core line is carried out drawing processing, be equipped with process annealing, align after being drawn to package size, the Cu/Nb single-core line after will aligning is then pressed the scale cutting;
(2) with the Cu/Nb single-core line pickling in rare nitric acid after the scale cutting in oxygen-free copper pipe and the step (1), oven dry respectively after the dehydration; Then the Cu/Nb single-core line after 61～85 oven dry is assembled in the oxygen-free copper pipe after the oven dry, obtains the once-combined rod of Cu-Nb;
(3) the once-combined rod of Cu-Nb described in the step (2) is carried out drawing processing, be equipped with process annealing, align after being drawn to package size, the once-combined rod of Cu-Nb behind the aligning is pressed the scale cutting, obtain the Cu-Nb complex line; With Cu-Nb complex line and the pickling in rare nitric acid of another oxygen-free copper pipe, dry respectively after the dehydration then; Again the Cu/Nb complex line after 61～85 oven dry is assembled in the oxygen-free copper pipe after the oven dry, obtains Cu-Nb secondary compound bar;
(4) carry out drawing processing after the method for (3) is processed twice repeatedly set by step with Cu-Nb secondary compound bar described in the step (3), be equipped with process annealing, be drawn to final size, obtain compound Cu-Nb matrix material four times.
The external diameter of oxygen-free copper pipe is 25mm～45mm described in above-mentioned steps (2) and the step (3), and wall thickness is 2mm～3mm, and length is 800mm～1000mm.
Package size is 1.6mm～3.8mm described in above-mentioned steps (1) and the step (3).
The pass reduction of drawing is 10%～20% described in above-mentioned steps (1), step (3) and the step (4).
Process annealing described in above-mentioned steps (1), step (3) and the step (4) is to be to anneal in 75%～97% o'clock in the total working modulus of drawing, and the system of described process annealing is: be to be incubated 1h～3h under 500 ℃～700 ℃ the condition in temperature.
The percent by volume of rare nitric acid is 20%～35% described in above-mentioned steps (2) and the step (3).
Described in the above-mentioned steps (4) in the Cu-Nb matrix material volumn concentration of Nb be 10%～20%.
The diameter of section of Cu-Nb matrix material is 0.8mm～3mm described in the above-mentioned steps (4).
The present invention compared with prior art has the following advantages:
1, technology of the present invention is simple, and preparation flow is short.
2, the present invention has avoided the negative impact (as melting impurity, phase skewness etc.) that Cu-Nb alloy casting process may be brought, and has reduced great number cost and long process-cycle that hot extrusion, jacket assembling bring.
3, adopt method of the present invention can make the Nb fiber in the Cu-Nb matrix material keep continuous, even, the matrix material of preparation has high strength, and (intensity is that (electric conductivity is 65%IACS～73%IACS), stable performance and practical characteristics for 750MPa～800MPa), good conductivity, can satisfy the pulse magnet needs, can be applicable to the pulsed magnetic field field.
Below by embodiment, technical scheme of the present invention is described in further detail.
Embodiment
Embodiment 1
(1) be that the Cu/Nb single-core line of Φ 30.0mm carries out drawing processing with diameter, pass reduction is 20%, carry out process annealing when being drawn to diameter and being Φ 8.0mm (the total working modulus of drawing is 93%), annealing schedule is 500 ℃ of insulation 1h, continuing to be drawn to diameter then is Φ 2.0mm, on the wire-straightening machine Cu/Nb single-core line after the drawing is being aligned, and then the Cu/Nb single-core line after will aligning is pressed the scale cutting;
(2) be pickling in rare nitric acid of 20% with the Cu/Nb single-core line after the scale cutting in the oxygen-free copper pipe of Φ 32mm * 2mm * 1000mm and 61 steps (1) in percent by volume, oven dry respectively after the dehydration; Then the Cu/Nb single-core line after 61 oven dry is assembled in the oxygen-free copper pipe after the oven dry, obtains the once-combined rod of Cu-Nb;
(3) the once-combined rod of Cu-Nb described in the step (2) is carried out drawing processing, pass reduction is 20%, carry out process annealing when being drawn to diameter and being Φ 8.0mm (the total working modulus of drawing is 94%), annealing schedule is 500 ℃ of insulation 1h, continuing to be drawn to diameter is Φ 2.0mm, on the wire-straightening machine the once-combined rod of the Cu-Nb after the drawing is being aligned, the once-combined rod of Cu-Nb behind the aligning is being pressed the scale cutting, obtaining the Cu-Nb complex line; Be pickling in rare nitric acid of 20% with the oxygen-free copper pipe of Cu-Nb complex line and another Φ 32mm * 2mm * 1000mm in percent by volume then, oven dry respectively after the dehydration; Again the Cu-Nb complex line after 61 oven dry is assembled in the oxygen-free copper pipe after the oven dry, obtains Cu-Nb secondary compound bar;
(4) carry out drawing processing after the method for (3) is processed twice repeatedly set by step with Cu-Nb secondary compound bar described in the step (3), pass reduction is 20%, carry out process annealing when being drawn to diameter and being Φ 8.0mm (the total working modulus of drawing is 94%), annealing schedule is 700 ℃ of insulation 1h, continuing to be drawn to diameter of section then is Φ 2.0mm, obtains compound Cu-Nb matrix material four times.
The volumn concentration of Nb is 10%～20% in the Cu-Nb matrix material of present embodiment preparation, it is continuous, even that the Nb fiber keeps, this composite property is stable, practical, the intensity of material is 750MPa～800MPa, electric conductivity is 65%IACS～73%IACS, can satisfy the pulse magnet needs, can be applicable to the pulsed magnetic field field.
Embodiment 2
(1) be that the Cu/Nb single-core line of Φ 40.0mm carries out drawing processing with diameter, pass reduction is 15%, carry out process annealing when being drawn to diameter and being Φ 20.0mm (the total working modulus of drawing is 75%), annealing schedule is 600 ℃ of insulation 2h, continuing to be drawn to diameter then is Φ 2.0mm, on the wire-straightening machine Cu/Nb single-core line after the drawing is being aligned, and then the Cu/Nb single-core line after will aligning is pressed the scale cutting;
(2) be pickling in rare nitric acid of 35% with the Cu/Nb single-core line after the scale cutting in the oxygen-free copper pipe of Φ 40mm * 3mm * 1000mm and 85 steps (1) in percent by volume, oven dry respectively after the dehydration; Then the Cu/Nb single-core line after 85 oven dry is assembled in the oxygen-free copper pipe after the oven dry, obtains the once-combined rod of Cu-Nb;
(3) the once-combined rod of Cu-Nb described in the step (2) is carried out drawing processing, pass reduction is 15%, carry out process annealing when being drawn to diameter and being Φ 20.0mm (the total working modulus of drawing is 75%), annealing schedule is 600 ℃ of insulation 2h, continuing to be drawn to diameter is Φ 2.0mm, on the wire-straightening machine the once-combined rod of the Cu-Nb after the drawing is being aligned, the once-combined rod of Cu-Nb behind the aligning is being pressed the scale cutting, obtaining the Cu-Nb complex line; Be pickling in rare nitric acid of 35% with the oxygen-free copper pipe of 85 Cu-Nb complex lines and another Φ 40mm * 3mm * 1000mm in percent by volume then, oven dry respectively after the dehydration; Again the Cu-Nb complex line after 85 oven dry is assembled in the oxygen-free copper pipe after the oven dry, obtains Cu-Nb secondary compound bar;
(4) carry out drawing processing after the method for (3) is processed twice repeatedly set by step with Cu-Nb secondary compound bar described in the step (3), pass reduction is 15%, carry out process annealing when being drawn to diameter and being Φ 20.0mm (the total working modulus of drawing is 75%), annealing schedule is 600 ℃ of insulation 2h, continuing to be drawn to diameter of section then is Φ 3.0mm, obtains compound Cu-Nb matrix material four times.
The volumn concentration of Nb is 10%～20% in the Cu-Nb matrix material of present embodiment preparation, it is continuous, even that the Nb fiber keeps, this composite property is stable, practical, the intensity of material is 750MPa～800MPa, electric conductivity is 65%IACS～73%IACS, can satisfy the pulse magnet needs, can be applicable to the pulsed magnetic field field.
Embodiment 3
(1) be that the Cu/Nb single-core line of Φ 25.0mm carries out drawing processing with diameter, pass reduction is 10%, carry out process annealing when being drawn to diameter and being Φ 6.0mm (the total working modulus of drawing is 94%), annealing schedule is 500 ℃ of insulation 3h, continuing to be drawn to diameter then is Φ 1.6mm, on the wire-straightening machine Cu/Nb single-core line after the drawing is being aligned, and then the Cu/Nb single-core line after will aligning is pressed the scale cutting;
(2) be pickling in rare nitric acid of 28% with the Cu/Nb single-core line after the scale cutting in the oxygen-free copper pipe of Φ 25mm * 2mm * 800mm and 61 steps (1) in percent by volume, oven dry respectively after the dehydration; Then the Cu/Nb single-core line after 61 oven dry is assembled in the oxygen-free copper pipe after the oven dry, obtains the once-combined rod of Cu-Nb;
(3) the once-combined rod of Cu-Nb described in the step (2) is carried out drawing processing, pass reduction is 10%, carry out process annealing when being drawn to diameter and being Φ 6.0mm (the total working modulus of drawing is 94%), annealing schedule is 500 ℃ of insulation 3h, continuing to be drawn to diameter is Φ 1.6mm, on the wire-straightening machine the once-combined rod of the Cu-Nb after the drawing is being aligned, the once-combined rod of Cu-Nb behind the aligning is being pressed the scale cutting, obtaining the Cu-Nb complex line; Be pickling in rare nitric acid of 28% with the oxygen-free copper pipe of 61 Cu-Nb complex lines and another Φ 25mm * 2mm * 800mm in percent by volume then, oven dry respectively after the dehydration; Again the Cu-Nb complex line after 61 oven dry is assembled in the oxygen-free copper pipe after the oven dry, obtains Cu-Nb secondary compound bar;
(4) carry out drawing processing after the method for (3) is processed twice repeatedly set by step with Cu-Nb secondary compound bar described in the step (3), pass reduction is 10%, carry out process annealing when being drawn to diameter and being Φ 6.0mm (the total working modulus of drawing is 94%), annealing schedule is 500 ℃ of insulation 3h, continuing to be drawn to diameter of section then is Φ 0.8mm, obtains compound Cu-Nb matrix material four times.
The volumn concentration of Nb is 10%～20% in the Cu-Nb matrix material of present embodiment preparation, it is continuous, even that the Nb fiber keeps, this composite property is stable, practical, the intensity of material is 750MPa～800MPa, electric conductivity is 65%IACS～73%IACS, can satisfy the pulse magnet needs, can be applicable to the pulsed magnetic field field.
Embodiment 4
(1) be that the Cu/Nb single-core line of Φ 40.0mm carries out drawing processing with diameter, pass reduction is 20%, carry out process annealing when being drawn to diameter and being Φ 20.0mm (the total working modulus of drawing is 75%), annealing schedule is 700 ℃ of insulation 1h, continuing to be drawn to diameter then is Φ 3.8mm, on the wire-straightening machine Cu/Nb single-core line after the drawing is being aligned, and then the Cu/Nb single-core line after will aligning is pressed the scale cutting;
(2) be pickling in rare nitric acid of 30% with the Cu/Nb single-core line after the scale cutting in the oxygen-free copper pipe of Φ 40mm * 2mm * 1000mm and 85 steps (1) in percent by volume, oven dry respectively after the dehydration; Then the Cu/Nb single-core line after 85 oven dry is assembled in the oxygen-free copper pipe after the oven dry, obtains the once-combined rod of Cu-Nb;
(3) the once-combined rod of Cu-Nb described in the step (2) is carried out drawing processing, pass reduction is 20%, carry out process annealing when being drawn to diameter and being Φ 20.0mm (the total working modulus of drawing is 75%), annealing schedule is 700 ℃ of insulation 1h, continuing to be drawn to diameter is Φ 3.8mm, on the wire-straightening machine the once-combined rod of the Cu-Nb after the drawing is being aligned, the once-combined rod of Cu-Nb behind the aligning is being pressed the scale cutting, obtaining the Cu-Nb complex line; Be pickling in rare nitric acid of 30% with the oxygen-free copper pipe of Cu-Nb complex line and another Φ 40mm * 2mm * 1000mm in percent by volume then, oven dry respectively after the dehydration; Again the Cu-Nb complex line after 85 oven dry is assembled in the oxygen-free copper pipe after the oven dry, obtains Cu-Nb secondary compound bar;
(4) carry out drawing processing after the method for (3) is processed twice repeatedly set by step with Cu-Nb secondary compound bar described in the step (3), pass reduction is 20%, carry out process annealing when being drawn to diameter and being Φ 20.0mm (the total working modulus of drawing is 75%), annealing schedule is 700 ℃ of insulation 1h, continuing to be drawn to diameter of section then is Φ 2.5mm, obtains compound Cu-Nb matrix material four times.
The volumn concentration of Nb is 10%～20% in the Cu-Nb matrix material of present embodiment preparation, it is continuous, even that the Nb fiber keeps, this composite property is stable, practical, the intensity of material is 750MPa～800MPa, electric conductivity is 65%IACS～73%IACS, can satisfy the pulse magnet needs, can be applicable to the pulsed magnetic field field.
Embodiment 5
(1) be that the Cu/Nb single-core line of Φ 30.0mm carries out drawing processing with diameter, pass reduction is 15%, carry out process annealing when being drawn to diameter and being Φ 8.0mm (the total working modulus of drawing is 93%), annealing schedule is 600 ℃ of insulation 1h, continuing to be drawn to diameter then is Φ 2.5mm, on the wire-straightening machine Cu/Nb single-core line after the drawing is being aligned, and then the Cu/Nb single-core line after will aligning is pressed the scale cutting;
(2) be pickling in rare nitric acid of 35% with the Cu/Nb single-core line after the scale cutting in the oxygen-free copper pipe of Φ 45mm * 3mm * 1000mm and 73 steps (1) in percent by volume, oven dry respectively after the dehydration; Then the Cu/Nb single-core line after 73 oven dry is assembled in the oxygen-free copper pipe after the oven dry, obtains the once-combined rod of Cu-Nb;
(3) the once-combined rod of Cu-Nb described in the step (2) is carried out drawing processing, pass reduction is 15%, carry out process annealing when being drawn to diameter and being Φ 8.0mm (the total working modulus of drawing is 97%), annealing schedule is 600 ℃ of insulation 1h, continuing to be drawn to diameter is Φ 2.5mm, on the wire-straightening machine the once-combined rod of the Cu-Nb after the drawing is being aligned, the once-combined rod of Cu-Nb behind the aligning is being pressed the scale cutting, obtaining the Cu-Nb complex line; Be pickling in rare nitric acid of 35% with the oxygen-free copper pipe of Cu-Nb complex line and another Φ 45mm * 3mm * 1000mm in percent by volume then, oven dry respectively after the dehydration; Again the Cu-Nb complex line after 73 oven dry is assembled in the oxygen-free copper pipe after the oven dry, obtains Cu-Nb secondary compound bar;
(4) carry out drawing processing after the method for (3) is processed twice repeatedly set by step with Cu-Nb secondary compound bar described in the step (3), pass reduction is 15%, carry out process annealing when being drawn to diameter and being Φ 8.0mm (the total working modulus of drawing is 97%), annealing schedule is 600 ℃ of insulation 1h, continuing to be drawn to diameter of section then is Φ 2.0mm, obtains compound Cu-Nb matrix material four times.
The volumn concentration of Nb is 10%～20% in the Cu-Nb matrix material of present embodiment preparation, it is continuous, even that the Nb fiber keeps, this composite property is stable, practical, the intensity of material is 750MPa～800MPa, electric conductivity is 65%IACS～73%IACS, can satisfy the pulse magnet needs, can be applicable to the pulsed magnetic field field.
The above; it only is preferred embodiment of the present invention; be not that the present invention is done any restriction, everyly any simple modification that above embodiment did, change and equivalent structure changed, all still belong in the protection domain of technical solution of the present invention according to the invention technical spirit.
Claims (8)
1. the short process making method of a Cu-Nb matrix material is characterized in that, this method may further comprise the steps:
(1) the Cu/Nb single-core line is carried out drawing processing, be equipped with process annealing, align after being drawn to package size, the Cu/Nb single-core line after will aligning is then pressed the scale cutting;
(2) with the Cu/Nb single-core line pickling in rare nitric acid after the scale cutting in oxygen-free copper pipe and the step (1), oven dry respectively after the dehydration; Then the Cu/Nb single-core line after 61～85 oven dry is assembled in the oxygen-free copper pipe after the oven dry, obtains the once-combined rod of Cu-Nb;
(3) the once-combined rod of Cu-Nb described in the step (2) is carried out drawing processing, be equipped with process annealing, align after being drawn to package size, the once-combined rod of Cu-Nb behind the aligning is pressed the scale cutting, obtain the Cu-Nb complex line; With Cu-Nb complex line and the pickling in rare nitric acid of another oxygen-free copper pipe, dry respectively after the dehydration then; Again the Cu/Nb complex line after 61～85 oven dry is assembled in the oxygen-free copper pipe after the oven dry, obtains Cu-Nb secondary compound bar;
(4) carry out drawing processing after the method for (3) is processed twice repeatedly set by step with Cu-Nb secondary compound bar described in the step (3), be equipped with process annealing, be drawn to final size, obtain compound Cu-Nb matrix material four times.
2. the short process making method of a kind of Cu-Nb matrix material according to claim 1 is characterized in that, the external diameter of oxygen-free copper pipe is 25mm～45mm described in step (2) and the step (3), and wall thickness is 2mm～3mm, and length is 800mm～1000mm.
3. the short process making method of a kind of Cu-Nb matrix material according to claim 1 is characterized in that, package size is 1.6mm～3.8mm described in step (1) and the step (3).
4. the short process making method of a kind of Cu-Nb matrix material according to claim 1 is characterized in that, the pass reduction of drawing is 10%～20% described in step (1), step (3) and the step (4).
5. the short process making method of a kind of Cu-Nb matrix material according to claim 1, it is characterized in that, process annealing described in step (1), step (3) and the step (4) is to be to anneal in 75%～97% o'clock in the total working modulus of drawing, and the system of described process annealing is: be to be incubated 1h～3h under 500 ℃～700 ℃ the condition in temperature.
6. the short process making method of a kind of Cu-Nb matrix material according to claim 1 is characterized in that, the percent by volume of rare nitric acid is 20%～35% described in step (2) and the step (3).
7. the short process making method of a kind of Cu-Nb matrix material according to claim 1 is characterized in that, described in the step (4) in the Cu-Nb matrix material volumn concentration of Nb be 10%～20%.
8. the short process making method of a kind of Cu-Nb matrix material according to claim 1 is characterized in that, the diameter of section of Cu-Nb matrix material is 0.8mm～3mm described in the step (4).
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| CN102723144A (en) * | 2012-06-19 | 2012-10-10 | 西北有色金属研究院 | Method for preparing Cu-Ag multi-core composite wire |
| CN107904389A (en) * | 2017-11-20 | 2018-04-13 | 福州大学 | A kind of method for annealing of copper niobium composite wire |
| CN109321776A (en) * | 2018-11-26 | 2019-02-12 | 北京科技大学 | A method of copper-niobium alloys are manufactured using laser gain material technology |
| CN112007949A (en) * | 2020-08-27 | 2020-12-01 | 西北有色金属研究院 | Preparation method of reinforced Cu-Nb composite wire |
| CN114643296A (en) * | 2022-03-21 | 2022-06-21 | 西北有色金属研究院 | Preparation method of high-strength and high-toughness Cu-Nb-Cu composite wire |
| CN115083689A (en) * | 2022-07-04 | 2022-09-20 | 西北有色金属研究院 | Preparation method of reinforced Cu-Nb composite wire |
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Application publication date: 20110831 |