CN111118320A - Tantalum-containing copper alloy wire/strip and preparation method thereof - Google Patents
Tantalum-containing copper alloy wire/strip and preparation method thereof Download PDFInfo
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- CN111118320A CN111118320A CN201911320938.0A CN201911320938A CN111118320A CN 111118320 A CN111118320 A CN 111118320A CN 201911320938 A CN201911320938 A CN 201911320938A CN 111118320 A CN111118320 A CN 111118320A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
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- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/004—Copper alloys
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C9/00—Alloys based on copper
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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Abstract
The invention provides a tantalum-containing copper alloy wire/belt, which comprises the following components in percentage by mass: tantalum: 0.01-1.0%, silver: 0.01-1.0%, iron: 0.01-0.5% and the balance of copper. The continuous casting machine carries out high-temperature treatment on the copper-tantalum intermediate alloy, the silver, the copper-iron intermediate alloy and the copper, the copper-tantalum intermediate alloy, the silver, the copper-iron intermediate alloy and the copper are subjected to drawing casting after cooling, then are drawn for multiple times, are subjected to continuous heat treatment on annealing equipment after being subjected to micro-machining, obtain the tantalum-containing copper alloy wire, and are rolled into the tantalum-containing copper alloy strip with the required specification through a double-roller rolling mill. The addition of the tantalum effectively improves the magnetic conductivity of the copper alloy, the addition of the silver improves the strength of the copper alloy and ensures good conductivity of the copper alloy wire/strip, the iron element in the copper alloy is beneficial to further enhancing the magnetic conductivity of the copper alloy, and the combination of the elements of the tantalum, the silver, the iron and the copper ensures that the copper alloy material has good magnetic conductivity, conductivity and high strength.
Description
Technical Field
The invention belongs to the technical field of alloy strip manufacturing, and particularly relates to a tantalum-containing copper alloy wire/strip and a preparation method thereof.
Background
With the wide application of 5G electronic products, the handheld terminal has higher requirements on signal and data transmission, and the conductor in the wireless receiving device of the electronic terminal is required to have higher magnetic permeability, conductivity and strength so as to meet the characteristics of high stability and high data transmission of wireless connection. The tantalum-containing copper alloy wire/strip has the characteristics of high magnetic permeability, high conductivity and high strength, the stability of signal receiving can be effectively improved in a wireless receiving device, the data transmission speed is obviously improved, and the tantalum-containing copper alloy material is used as a transmission conductor of the electronic terminal wireless receiving device, so that the wireless receiving performance can be obviously improved.
At present, in an electronic terminal wireless receiving device, a pure copper wire/belt or an iron-containing copper alloy wire is mostly adopted as a conductor material, and a pure copper wire is adopted as a conductor and a shielding material, so that the stability of a wireless signal under a severe condition is not high and the transmission capability is limited due to the low magnetic permeability of the pure copper wire material; the iron-containing copper alloy material can further improve the stability and transmission performance of wireless signals, but the improvement is limited. The trace tantalum element is added into the iron-containing copper alloy, so that the magnetic permeability and the strength of the copper alloy wire/strip can be obviously improved, the electric conductivity is not influenced, the tantalum-containing copper alloy component is optimally designed, and the conductor material for the wireless receiving device suitable for the 5G signal transmission requirement can be obtained.
Because the melting point of tantalum is higher (the melting point is 2996 ℃), the tantalum is difficult to melt by adopting conventional melting, and the requirement of subsequent melting cannot be met by adopting a powder metallurgy method; in the smelting process of the tantalum-containing copper alloy, because the solubility of tantalum in copper is low, the tantalum is difficult to be uniformly dissolved in a copper matrix; in addition, the wireless receiving device needs a strip with a large width-thickness ratio to achieve a good shielding effect, and the processing difficulty of the strip with the large width-thickness ratio is obvious.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to overcome the problems that tantalum is difficult to uniformly dissolve in a copper matrix and a strip with a large width-thickness ratio is difficult to process in the prior art, and provides a tantalum-containing copper alloy wire/strip and a preparation method thereof.
In order to achieve the above purpose, the invention provides the following technical scheme:
a preparation method of tantalum-containing copper alloy wires/strips comprises the following steps:
s1, weighing the copper-tantalum intermediate alloy, the silver-copper-iron intermediate alloy and the copper according to the raw material ratio, placing the intermediate alloy, the silver-copper-iron intermediate alloy and the copper in a continuous casting machine filled with protective gas for high-temperature treatment, stirring an alloy melt after the alloy is completely melted, standing, cooling by cooling water, and then performing casting to obtain a continuously cast tantalum-containing copper alloy rod;
s2, drawing the continuously cast tantalum-containing copper alloy rod obtained in the step S1 on a wire drawing machine for multiple times to obtain a large-deformation tantalum-containing copper alloy rod;
s3, drawing the large-deformation tantalum-containing copper alloy rod obtained in the step S2 on a wire drawing machine to form a tantalum-containing copper alloy wire;
s4, performing micro-machining on the tantalum-containing copper alloy wire in the step S3, and then performing continuous heat treatment on annealing equipment to obtain the tantalum-containing copper alloy wire;
and S5, rolling the tantalum-containing copper alloy wire subjected to the heat treatment in the step S4 into a tantalum-containing copper alloy strip with the required specification on a double-roller mill.
As a preferable mode of the method for producing a tantalum-containing copper alloy wire/strip, the method for producing a copper-tantalum master alloy in step S1 includes: grinding copper and tantalum into powder, uniformly mixing the powder according to the mass ratio of 19:1, pressing the uniformly mixed powder into a cylinder, sintering the cylinder at high temperature under a vacuum condition, placing the cylinder in a vacuum suspension smelting furnace for first smelting after sintering is finished, and cooling to obtain the copper-tantalum intermediate alloy.
Preferably, the vacuum condition is a degree of vacuum higher than 5.0 × 10-2Pa, the high-temperature sintering temperature is 500-900 ℃, and the sintering time is 2-5 h.
More preferably, the temperature of the first smelting is 3000-3100 ℃, and the time of the first smelting is 10-20 min.
In the above method for producing a tantalum-containing copper alloy wire/strip, preferably, the method for producing a copper-iron intermediate alloy in step S1 includes: grinding copper and iron into powder, uniformly mixing the powder according to the mass ratio of 19:1, placing the powder in a vacuum suspension smelting furnace for secondary smelting, and cooling to obtain the copper-iron intermediate alloy.
Preferably, the temperature of the second smelting is 1500-1700 ℃, and the time of the second smelting is 10-20 min.
As a preferable scheme, in the step S1, the high-temperature treatment specifically includes vacuumizing the continuous casting machine, raising the temperature when the vacuum degree is higher than 5Pa, stopping vacuumizing after the temperature is raised to 800 ℃ and introducing protective gas into the high-vacuum continuous casting machine until the vacuum degree is 1.1-1.5MPa, and then continuing to raise the temperature to 1700 ℃ until the alloy is completely melted.
Preferably, the protective gas is argon or nitrogen.
More preferably, the continuous casting machine is a vertically-extended structure continuous casting machine.
More preferably, the diameter of the continuously cast tantalum-containing copper alloy rod is 8-12 mm.
In the above method for producing a tantalum-containing copper alloy wire/strip, preferably, the single-pass deformation rate of the drawing is not less than 30% when the diameter of the tantalum-containing copper alloy rod is not less than 3mm in step S2.
When the diameter of the tantalum-containing copper alloy rod is less than 3.0mm and is more than or equal to 1.3mm, the single-pass deformation rate of the drawing is 15-25%.
Preferably, the diameter of the tantalum-containing copper alloy rod with large deformation is 0.9-1.3 mm.
In the method for preparing the tantalum-containing copper alloy wire/strip, the single-pass deformation rate in the drawing process in the step S3 is preferably 7.0-12%.
Preferably, the diameter of the tantalum-containing copper alloy wire drawn is 0.1 to 0.3 mm.
In the above method for preparing tantalum-containing copper alloy wire/ribbon, preferably, in step S4, the micro-machining is performed by drawing the tantalum-containing copper alloy wire in step S3 to a diameter of 0.04-0.08mm, the area reduction rate in the drawing process is 6.0-11.0%, and the drawing speed is 300-800 m/min.
In the above method for producing a tantalum-containing copper alloy wire/strip, preferably, the annealing pipe of the annealing device in step S4 has a length of 1.5-5m, and pure alcohol is provided at the outlet of the annealing pipe for cooling the tantalum-containing copper alloy wire after heat treatment;
the temperature of the heat treatment is 200-800 ℃, and the speed of the heat treatment is 20-200 m/min;
preferably, the diameter of the roller of the double-roller mill in the step S5 is 40-70mm, and the rolling speed of the double-roller mill is less than or equal to 300 m/min.
A tantalum-containing copper alloy wire/belt comprises the following components in percentage by mass: tantalum: 0.01-1.0%, silver: 0.01-1.0%, iron: 0.01-0.5% and the balance of copper.
The tantalum-containing copper alloy wire/belt preferably comprises the following components in percentage by mass: tantalum: 0.02-0.8%, silver: 0.03-0.8%, iron: 0.02-0.3% and the balance of copper.
Compared with the closest prior art, the technical scheme provided by the invention has the following excellent effects:
1. the addition of the tantalum element in the copper alloy effectively improves the magnetic conductivity of the copper alloy, the addition of the silver element improves the strength of the copper alloy, and can ensure good conductivity of the copper alloy wire/strip, the iron element in the copper alloy is beneficial to further enhancing the magnetic conductivity of the copper alloy, and the combination of the elements of the tantalum, the silver, the iron and the copper ensures that the copper alloy material has good magnetic conductivity, conductivity and high strength.
2. The invention provides a preparation method of a copper alloy wire/belt containing high-melting-point alloy, which comprises the steps of processing tantalum and copper into powder, uniformly mixing, then performing compression molding, performing vacuum sintering, and then dissolving the high-melting-point tantalum into a copper matrix through suspension smelting, thereby realizing uniform post-smelting of the high-melting-point alloy; the alloy is cast by adopting the continuous casting machine with the vertical drawing structure, so that the distribution of alloy components is ensured to be uniform, the alloy structure is more compact, the alloy strength is improved, the problem that the traditional method cannot carry out uniform smelting and continuous casting is solved, and the defects of component segregation, looseness, air holes and the like in the copper alloy rod are eliminated.
3. The invention provides a preparation method of a tantalum-containing alloy wire/strip, which reduces the internal defects of an alloy material and obviously refines crystal grains by carrying out large-deformation cold processing on a continuously-cast tantalum-containing alloy rod; then, a fine drawing stage is carried out, and the alloy wire structure is processed by adopting a small deformation rate, so that the alloy wire structure is favorably stabilized; then rolling the alloy wire into a strip by using a small-diameter roller, so that the ratio of the width to the thickness of the strip is improved, and a wider and thinner micro copper alloy strip is obtained; the ratio of the width to the thickness of the tantalum-containing copper alloy wire is more than or equal to 10, and the prepared tantalum-containing copper alloy wire/belt has high magnetic permeability, high conductivity and high strength.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. Wherein:
FIG. 1 is a metallographic microstructure of a tantalum-containing copper alloy wire/strip prepared in example 1 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The present invention will be described in detail with reference to examples. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The tantalum-containing copper alloy wire/belt comprises tantalum, silver, iron and copper elements, the addition of the tantalum element effectively improves the magnetic conductivity of the copper alloy, the addition of the silver element improves the strength of the copper alloy and can ensure good conductivity of the copper alloy wire/belt, the iron element in the copper alloy is beneficial to further enhancing the magnetic conductivity of the copper alloy, and the combination of the elements ensures that the tantalum-containing copper alloy wire/belt has good magnetic conductivity, conductivity and high strength; however, for the alloy, because the melting point of tantalum is higher, common smelting can not be realized, and tantalum is easy to agglomerate in a copper matrix, so that tantalum elements are difficult to uniformly distribute in the copper matrix, and common smelting is difficult to realize; the copper alloy is smelted through a vertical-drawing high-vacuum continuous casting machine, and the vertical-drawing structure of the continuous casting machine ensures that the continuously cast copper alloy rod has a uniform tissue structure and component distribution; the alloy grain structure is further refined through large-deformation cold processing, the alloy structure is more compact, and the alloy strength is improved; in the alloy rolling process, the diameter of the roller is reduced, so that the high-precision alloy strip is further obtained, and the ratio of the width to the thickness of the strip is further improved.
The invention provides a tantalum-containing copper alloy wire/belt, which comprises the following components in percentage by mass: tantalum: 0.01-1.0% (such as 0.01%, 0.02%, 0.03%, 0.05%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8%, 0.85%, 0.9%, 0.95%, 1.0%), silver: 0.01-1.0% (0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8%, 0.85%, 0.9%, 0.95%, 1.0%), iron: 0.01-0.5% (e.g., 0.01%, 0.02%, 0.03%, 0.05%, 0.07%, 0.09%, 0.1%, 0.13%, 0.15%, 0.17%, 0.2%, 0.23%, 0.25%, 0.27%, 0.3%, 0.33%, 0.37%, 0.4%, 0.42%, 0.44%, 0.46%, 0.48%, 0.5%), with the balance being copper.
More preferably, the tantalum-containing copper alloy wire/belt comprises the following components in percentage by mass: tantalum: 0.02 to 0.8% (e.g., 0.02%, 0.03%, 0.05%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8%), silver: 0.03-0.8% (e.g., 0.03%, 0.04%, 0.05%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8%), iron: 0.02-0.3% (e.g., 0.02%, 0.03%, 0.05%, 0.07%, 0.09%, 0.1%, 0.13%, 0.15%, 0.17%, 0.2%, 0.23%, 0.25%, 0.27%, 0.3%), and the balance copper.
In order to further understand the tantalum-containing copper alloy wire/strip of the invention, the invention also provides a preparation method of the tantalum-containing copper alloy wire/strip, which comprises the following steps:
s1, weighing the copper-tantalum intermediate alloy, the silver-copper-iron intermediate alloy and the copper according to the raw material ratio, placing the intermediate alloy, the silver-copper-iron intermediate alloy and the copper in a continuous casting machine filled with protective gas for high-temperature treatment, stirring an alloy melt after the alloy is completely melted, standing, cooling by cooling water, and then performing casting to obtain a continuously cast tantalum-containing copper alloy rod;
in an embodiment of the present invention, the preparation method of the copper-tantalum master alloy in step S1 includes: grinding copper and tantalum into powder, uniformly mixing the powder according to the mass ratio of 19:1, pressing the uniformly mixed powder into a cylinder, sintering the cylinder at high temperature under a vacuum condition, placing the cylinder in a vacuum suspension smelting furnace for first smelting after sintering is finished, and cooling to obtain a copper-tantalum intermediate alloy; preferably, the vacuum condition is a degree of vacuum higher than 5.0 × 10-2Pa, the high-temperature sintering temperature is 500-900 ℃ (such as 500 ℃, 550 ℃, 580 ℃, 600 ℃, 620 ℃, 650 ℃, 680 ℃, 700 ℃, 720 ℃, 750 ℃, 780 ℃, 800 ℃, 820 ℃, 850 ℃, 880 ℃, 900 ℃), and the sintering time is 2-5h (2h, 2.5h, 2.8h, 3h, 3.2h, 3.5h, 3.8h, 4h, 4.2h, 4.5h, 4.8h, 5 h); more preferably, the temperature of the first melting is 3000-3100 ℃ (such as 3000 ℃, 3010 ℃, 3020 ℃, 3030 ℃, 3040 ℃, 3050 ℃, 3060 ℃, 3070 ℃, 3080 ℃, 3090 ℃, 3100 ℃), and the time of the first melting is 10-20min (such as 10min, 11min, 12min, 13min, 14min, 15min, 16min, 17min, 18min, 19min, 20 min).
In a specific embodiment of the present invention, the preparation method of the copper-iron intermediate alloy in step S1 includes: grinding copper and iron into powder, uniformly mixing the powder according to the mass ratio of 19:1, placing the powder in a vacuum suspension smelting furnace for second smelting, and cooling to obtain a copper-iron intermediate alloy; preferably, the temperature of the second melting is 1500-.
In a specific embodiment of the present invention, the high temperature treatment in step S1 is specifically, the continuous casting machine is vacuumized, the temperature starts to rise when the vacuum degree is higher than 5Pa, the vacuumization is stopped after the temperature rises to 600-; preferably, the protective gas is argon or nitrogen; more preferably, the continuous casting machine is a vertically-extended structure continuous casting machine; more preferably, the diameter of the continuously cast tantalum-containing copper alloy rod is 8-12mm (e.g., 8mm, 8.3mm, 8.5mm, 8.8mm, 9.0mm, 9.3mm, 9.5mm, 9.8mm, 10mm, 10.2mm, 10.5mm, 10.8mm, 11mm, 11.2mm, 11.5mm, 11.8mm, 12 mm).
S2, drawing the continuously cast tantalum-containing copper alloy rod obtained in the step S1 on a wire drawing machine for multiple times to obtain a large-deformation tantalum-containing copper alloy rod;
in the specific embodiment of the invention, when the diameter of the tantalum-containing copper alloy rod in the step S2 is more than or equal to 3mm, the single-pass deformation rate of drawing is more than or equal to 30%; when the diameter of the tantalum-containing copper alloy rod is less than 3.0mm and is more than or equal to 1.3mm, the single-pass deformation rate of drawing is 15-25% (such as 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24% and 25%); preferably, the large deformation tantalum-containing copper alloy rod has a diameter of 0.9-1.3mm (e.g., 0.9mm, 0.92mm, 0.94mm, 0.96mm, 0.98mm, 1.0mm, 1.02mm, 1.04mm, 1.06mm, 1.08mm, 1.1mm, 1.12mm, 1.14mm, 1.16mm, 1.18mm, 1.2mm, 1.22mm, 1.24mm, 1.26mm, 1.28mm, 1.3 mm).
S3, drawing the large-deformation tantalum-containing copper alloy rod obtained in the step S2 on a wire drawing machine to form a tantalum-containing copper alloy wire;
in an embodiment of the present invention, the single-pass deformation rate during the drawing process in step S3 is 7.0-12% (e.g., 7.0%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 11.5%, 12%); preferably, the drawn tantalum-containing copper alloy wire has a diameter of 0.1 to 0.3mm (e.g., 0.1mm, 0.12mm, 0.14mm, 0.16mm, 0.18mm, 0.2mm, 0.22mm, 0.24mm, 0.26mm, 0.28mm, 0.3 mm).
S4, performing micro-machining on the tantalum-containing copper alloy wire in the step S3, and then performing continuous heat treatment on annealing equipment to obtain the tantalum-containing copper alloy wire;
in a specific embodiment of the present invention, the micro-machining in step S4 is to draw the tantalum-containing copper alloy wire in step S3 to a diameter of 0.04-0.08mm (e.g., 0.04mm, 0.045mm, 0.05mm, 0.052mm, 0.055mm, 0.058mm, 0.06mm, 0.062mm, 0.065mm, 0.068mm, 0.07mm, 0.075mm, 0.08mm), a reduction ratio during drawing of 6.0-11.0% (e.g., 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 10.0%, 10.5%, 11.0%), a drawing speed of 300-800m/min (e.g., 300m/min, 350m/min, 400m/min, 420m/min, 450m/min, 480 m/680 m/min, 520m/min, 650m/min, 700 m/580 min, 580m/min, 580m/min, 580 min, 700m/min, 750m/min, 800 m/min).
In the embodiment of the present invention, the annealing pipe of the annealing apparatus in step S4 has a length of 1.5-5m (e.g., 1.5m, 1.8m, 2.0m, 2.5m, 3.0m, 3.2m, 3.5m, 3.8m, 4m, 4.5m, 5m), and pure alcohol is disposed at the outlet of the annealing pipe for cooling the tantalum-containing copper alloy wire after the heat treatment; the heat treatment temperature is 200-.
And S5, rolling the tantalum-containing copper alloy wire subjected to the heat treatment in the step S4 into a tantalum-containing copper alloy strip with the required specification on a double-roller mill.
In the embodiment of the invention, the diameter of the roll of the double-roll mill in the step S5 is 40-70mm (such as 40mm, 42mm, 45mm, 48mm, 50mm, 52mm, 55mm, 58mm, 60mm, 62mm, 65mm, 68mm, 70mm), and the rolling speed of the double-roll mill is less than or equal to 300 m/min.
The tantalum raw material and the iron raw material used in the examples and the comparative examples of the present invention need to be prepared into a copper-tantalum intermediate alloy and a copper-iron intermediate alloy in advance, and specifically include:
preparing a copper-tantalum intermediate alloy: grinding copper and tantalum into powder with the granularity higher than 300 meshes, uniformly mixing the copper powder and the tantalum powder according to the mass ratio of 19:1, pressing the uniformly mixed powder into a cylinder, and pressing the cylinder into a cylinder shape with the vacuum degree higher than 5.0 multiplied by 10-2Sintering at 500-900 deg.C for 2-5h under Pa, placing in vacuum suspension smelting furnace after sintering, and vacuumizing the hearth of the vacuum suspension smelting furnace to vacuum degree higher than 1.0 × 10-2After Pa, starting smelting, gradually increasing the smelting voltage, heating the mixture of the copper powder and the tantalum powder to enable the mixture to gradually suspend, stopping increasing the smelting voltage when the temperature rises to 3000-; machining the copper-tantalum intermediate alloy into chips or particles in a mechanical machining mode;
preparing a copper-iron intermediate alloy: grinding copper and iron into powder, uniformly mixing the powder according to the mass ratio of 19:1, placing the powder into a suspension smelting crucible of a vacuum suspension smelting furnace, vacuumizing a hearth of the vacuum suspension smelting furnace, wherein the vacuum degree is higher than 1.0 multiplied by 10-2After Pa, starting smelting, gradually increasing the smelting voltage, heating the mixture of the copper powder and the iron powder to enable the mixture to gradually suspend, when the temperature is increased to 1500-; and machining the copper-iron intermediate alloy into chips or particles by adopting a mechanical machining mode.
Example 1
In the embodiment, the tantalum-containing copper alloy wire/strip comprises the following components in percentage by mass: tantalum: 0.8%, silver: 0.8%, iron: 0.02% and the balance copper.
The preparation method of the tantalum-containing copper alloy wire/strip provided by the embodiment comprises the following steps:
s1, weighing 1600g of copper-tantalum intermediate alloy, 80g of silver, 40g of copper-iron intermediate alloy and 8280g of copper, placing the copper-tantalum intermediate alloy, 80g of silver, 40g of copper-iron intermediate alloy and 8280g of copper in a graphite crucible of a vertical-drawing type vacuum intermediate-frequency continuous casting machine, vacuumizing a hearth of the vertical-drawing type vacuum intermediate-frequency continuous casting machine, starting heating when the vacuum degree is higher than 5.0Pa, stopping vacuumizing and filling argon or nitrogen protective gas into the vacuum intermediate-frequency continuous casting machine after the temperature is raised to 600 ℃, heating to 1500 ℃, stirring an alloy melt after the alloy is completely melted, standing for 3min, starting cooling water of a crystallizer, starting a traction mechanism to perform intermittent casting on the alloy, and obtaining a continuously cast tantalum-containing copper alloy rod with the diameter of 8 mm; wherein the water inlet temperature of the cooling water is not higher than 20 ℃, and the water outlet temperature is not higher than 30 ℃; when the alloy is subjected to drawing casting by the drawing mechanism, the drawing time and the stopping time are the same, and both the drawing time and the stopping time are more than 0.2 s;
s2, drawing the continuously cast tantalum-containing copper alloy rod with the diameter of 8mm obtained in the step S1 on a straight-moving type vertical large-deformation wire drawing machine for multiple times, wherein when the diameter of the tantalum-containing copper alloy rod is larger than or equal to 3mm, the single-pass deformation rate of drawing is 30%, the diameter of the tantalum-containing copper alloy rod is smaller than 3.0mm, and when the diameter of the tantalum-containing copper alloy rod is larger than or equal to 0.9mm, the single-pass deformation rate of drawing is 15%, and the diameter of the tantalum-containing copper alloy rod subjected to large-deformation cold machining is 0.9 mm;
s3, drawing the large-deformation tantalum-containing copper alloy rod with the diameter of 0.9mm obtained in the step S2 on a wire drawing machine, wherein the single-pass deformation rate in the drawing process is 7%, and the tantalum-containing copper alloy rod with the diameter of 0.1mm is drawn;
s4, drawing the tantalum-containing copper alloy wire with the diameter of 0.1mm in the step S3, wherein the surface reduction rate in the drawing process is 6 percent, the drawing speed is 300m/min, and the diameter of the copper alloy wire is 0.04 mm; then carrying out heat treatment on annealing equipment, wherein the heat treatment temperature is 200 ℃, the length of an annealing pipe is 5m, the heat treatment speed is 20m/min, pure alcohol is arranged at an outlet of an annealing pipe and used for cooling the tantalum-containing copper alloy wire after heat treatment, and the surface of the wire rod is dried by a high-pressure air knife;
and S5, rolling the tantalum-containing copper alloy wire subjected to the heat treatment in the step S4 on a double-roller mill into a tantalum-containing copper alloy strip with the required specification, wherein the diameter of a roller of the double-roller mill is 40mm, and the rolling speed of the double-roller mill is 100 m/min.
As shown in fig. 1, which is a structure diagram of a metallographic microstructure of the tantalum-containing copper alloy wire/strip prepared in this example, it can be seen from the diagram that the alloy components are uniformly distributed, the alloy structure is relatively dense, the internal defects of the alloy material are few, and the grain refinement is obvious.
And (3) performance testing:
the tantalum-containing copper alloy wire/belt prepared in the embodiment of the invention is subjected to magnetic conductivity, conductivity and strength tests, wherein the magnetic conductivity test refers to a GB/T35690-2017 weak magnetic material relative magnetic conductivity measurement method, and a magnetic conductivity tester is adopted for testing; the conductivity test refers to the GB/T3048.2-2007 electric wire and cable electrical property test method, and a double-arm bridge is adopted for testing; the strength test refers to the GB/T3048.2-2007 electric wire and cable electrical property test method, and an electronic strength tester is adopted for testing.
The ratio of the width to the thickness of the tantalum-containing copper alloy wire/strip prepared in the example of the present invention was 10.
By testing the magnetic conductivity, the conductivity and the strength of the prepared tantalum-containing copper alloy wire/belt, the relative magnetic conductivity is 40, the conductivity is 69% IACS, and the tensile strength is 430 MPa.
Example 2
In the embodiment, the tantalum-containing copper alloy wire/strip comprises the following components in percentage by mass: tantalum: 0.4%, silver: 0.1%, iron: 0.02% and the balance copper.
In the preparation method of the tantalum-containing copper alloy wire/strip provided in this embodiment, 800g of copper-tantalum intermediate alloy, 10g of silver, 40g of copper-iron intermediate alloy and 9150g of copper are weighed in step S1. Other methods and steps are the same as those in embodiment 1, and are not described herein again.
The tantalum-containing copper alloy wire/strip prepared in this example was tested for magnetic permeability, electrical conductivity and strength, with the same test standards and methods as in example 1.
The ratio of the width to the thickness of the tantalum-containing copper alloy wire/strip prepared in this example was 10.
By testing the magnetic conductivity, the conductivity and the strength of the prepared tantalum-containing copper alloy wire/belt, the relative magnetic conductivity is 16, the conductivity is 71% IACS, and the tensile strength is 380 MPa.
Example 3
In the embodiment, the tantalum-containing copper alloy wire/strip comprises the following components in percentage by mass: tantalum: 0.02%, silver: 0.03%, iron: 0.02% and the balance copper.
In the preparation method of the tantalum-containing copper alloy wire/strip provided in this embodiment, in step S1, 40g of copper-tantalum intermediate alloy, 3g of silver, 40g of copper-iron intermediate alloy, and 9917g of copper are weighed. Other methods and steps are the same as those in embodiment 1, and are not described herein again.
The tantalum-containing copper alloy wire/strip prepared in this example was tested for magnetic permeability, electrical conductivity and strength, with the same test standards and methods as in example 1.
The tantalum-containing copper alloy wire/strip prepared in this example had a width to thickness ratio of 12.
By testing the magnetic conductivity, the conductivity and the strength of the prepared tantalum-containing copper alloy wire/belt, the relative magnetic conductivity is 12, the conductivity is 86% IACS, and the tensile strength is 330 MPa.
Example 4
In the embodiment, the tantalum-containing copper alloy wire/strip comprises the following components in percentage by mass: tantalum: 0.02%, silver: 0.1%, iron: 0.3 percent of copper and the balance of copper.
The preparation method of the tantalum-containing copper alloy wire/strip provided by the embodiment comprises the following steps:
s1, weighing 40g of copper-tantalum intermediate alloy, 10g of silver, 600g of copper-iron intermediate alloy and 9350g of copper, placing the copper-tantalum intermediate alloy, 10g of silver, 600g of copper-iron intermediate alloy and 9350g of copper in a graphite crucible of a vertical-drawing type vacuum intermediate-frequency continuous casting machine, vacuumizing a hearth of the vertical-drawing type vacuum intermediate-frequency continuous casting machine, starting heating up the hearth with the vacuum degree higher than 5.0Pa, stopping vacuumizing and filling argon or nitrogen protective gas into the vacuum intermediate-frequency continuous casting machine after the temperature is raised to 700 ℃, heating up to 1600 ℃, stirring an alloy melt after the alloy is completely melted, standing for 5min, starting cooling water of a crystallizer, starting a traction mechanism to perform intermittent casting on the alloy, and obtaining a continuously cast tantalum-containing copper alloy rod with the diameter of 10 mm; wherein the water inlet temperature of the cooling water is not higher than 20 ℃, and the water outlet temperature is not higher than 30 ℃; when the alloy is subjected to drawing casting by the drawing mechanism, the drawing time and the stopping time are the same, and both the drawing time and the stopping time are more than 0.2 s;
s2, drawing the continuously cast tantalum-containing copper alloy rod with the diameter of 10mm obtained in the step S1 on a straight-moving type vertical large-deformation wire drawing machine for multiple times, wherein when the diameter of the tantalum-containing copper alloy rod is larger than or equal to 3mm, the single-pass deformation rate of drawing is 40%, the diameter of the tantalum-containing copper alloy rod is smaller than 3.0mm, and when the diameter of the tantalum-containing copper alloy rod is larger than or equal to 1.0mm, the single-pass deformation rate of drawing is 20%, and the diameter of the large-deformation cold-processed tantalum-containing copper alloy rod is 1.0 mm;
s3, drawing the large-deformation tantalum-containing copper alloy rod with the diameter of 1.0mm obtained in the step S2 on a wire drawing machine, wherein the single-pass deformation rate in the drawing process is 10%, and the tantalum-containing copper alloy rod with the diameter of 0.2mm is drawn;
s4, drawing the tantalum-containing copper alloy wire with the diameter of 0.2mm in the step S3, wherein the surface reduction rate in the drawing process is 9 percent, the drawing speed is 500m/min, and the diameter of the copper alloy wire is 0.06 mm; then carrying out heat treatment on annealing equipment, wherein the heat treatment temperature is 600 ℃, the length of an annealing pipe is 3m, the heat treatment speed is 100m/min, pure alcohol is arranged at an outlet of an annealing pipe and used for cooling the tantalum-containing copper alloy wire after heat treatment, and the surface of the wire rod is dried by a high-pressure air knife;
and S5, rolling the tantalum-containing copper alloy wire subjected to the heat treatment in the step S4 on a double-roller mill into a tantalum-containing copper alloy strip with the required specification, wherein the diameter of a roller of the double-roller mill is 50mm, and the rolling speed of the double-roller mill is 150 m/min.
The tantalum-containing copper alloy wire/strip prepared in this example was tested for magnetic permeability, electrical conductivity and strength, with the same test standards and methods as in example 1.
The ratio of the width to the thickness of the tantalum-containing copper alloy wire/strip prepared in the example of the present invention was 12.
By testing the magnetic conductivity, the conductivity and the strength of the prepared tantalum-containing copper alloy wire/belt, the relative magnetic conductivity is 13, the conductivity is 67 percent IACS, and the tensile strength is 340 MPa.
Example 5
In the embodiment, the tantalum-containing copper alloy wire/strip comprises the following components in percentage by mass: tantalum: 0.4%, silver: 0.1%, iron: 0.04% and the balance copper.
In the preparation method of the tantalum-containing copper alloy wire/strip provided in the embodiment, 800g of copper-tantalum intermediate alloy, 10g of silver, 80g of copper-iron intermediate alloy and 9110g of copper are weighed in step S1. Other methods and steps are the same as those in embodiment 4, and are not described herein again.
The tantalum-containing copper alloy wire/strip prepared in this example was tested for magnetic permeability, electrical conductivity and strength, with the same test standards and methods as in example 1.
The tantalum-containing copper alloy wire/strip prepared in this example had a width to thickness ratio of 15.
By testing the magnetic conductivity, the conductivity and the strength of the prepared tantalum-containing copper alloy wire/belt, the relative magnetic conductivity is 23, the conductivity is 73% IACS, and the tensile strength is 420 MPa.
Example 6
In the embodiment, the tantalum-containing copper alloy wire/strip comprises the following components in percentage by mass: tantalum: 0.8%, silver: 0.1%, iron: 0.02% and the balance copper.
In the preparation method of the tantalum-containing copper alloy wire/strip provided in the embodiment, 1600g of copper-tantalum intermediate alloy, 10g of silver, 40g of copper-iron intermediate alloy and 8350g of copper are weighed in step S1. Other methods and steps are the same as those in embodiment 4, and are not described herein again.
The tantalum-containing copper alloy wire/strip prepared in this example was tested for magnetic permeability, electrical conductivity and strength, with the same test standards and methods as in example 1.
The tantalum-containing copper alloy wire/strip prepared in this example had a width to thickness ratio of 15.
By testing the magnetic conductivity, the conductivity and the strength of the prepared tantalum-containing copper alloy wire/belt, the relative magnetic conductivity is 41, the conductivity is 70% IACS, and the tensile strength is 360 MPa.
Example 7
In the embodiment, the tantalum-containing copper alloy wire/strip comprises the following components in percentage by mass: tantalum: 0.02%, silver: 0.8%, iron: 0.02% and the balance copper.
The preparation method of the tantalum-containing copper alloy wire/strip provided by the embodiment comprises the following steps:
s1, weighing 40g of copper-tantalum intermediate alloy, 80g of silver, 40g of copper-iron intermediate alloy and 9840g of copper, placing the copper-tantalum intermediate alloy, 80g of silver, 40g of copper-iron intermediate alloy and 9840g of copper in a graphite crucible of a vertical-drawing type vacuum intermediate-frequency continuous casting machine, vacuumizing a hearth of the vertical-drawing type vacuum intermediate-frequency continuous casting machine, starting heating when the vacuum degree is higher than 5.0Pa, stopping vacuumizing and filling argon or nitrogen protective gas into the vacuum intermediate-frequency continuous casting machine after the temperature is raised to 800 ℃, heating to 1700 ℃, stirring an alloy melt after the alloy is completely melted, standing for 3-5min, starting cooling water of a crystallizer, starting a traction mechanism to perform intermittent casting on the alloy, and obtaining a continuously cast tantalum-containing copper alloy rod with the diameter of 12 mm; wherein the water inlet temperature of the cooling water is not higher than 20 ℃, and the water outlet temperature is not higher than 30 ℃; when the alloy is subjected to drawing casting by the drawing mechanism, the drawing time and the stopping time are the same, and both the drawing time and the stopping time are more than 0.2 s;
s2, drawing the continuously cast tantalum-containing copper alloy rod with the diameter of 12mm obtained in the step S1 on a straight-moving type vertical large-deformation wire drawing machine for multiple times, wherein when the diameter of the tantalum-containing copper alloy rod is larger than or equal to 3mm, the single-pass deformation rate of drawing is 45%, the diameter of the tantalum-containing copper alloy rod is smaller than 3.0mm, and when the diameter of the tantalum-containing copper alloy rod is larger than or equal to 1.0mm, the single-pass deformation rate of drawing is 25%, and the diameter of the large-deformation cold-processed tantalum-containing copper alloy rod is 1.3 mm;
s3, drawing the large-deformation tantalum-containing copper alloy rod with the diameter of 1.3mm obtained in the step S2 on a wire drawing machine, wherein the single-pass deformation rate in the drawing process is 12%, and the tantalum-containing copper alloy rod with the diameter of 0.3mm is drawn;
s4, drawing the tantalum-containing copper alloy wire with the diameter of 0.3mm in the step S3, wherein the surface reduction rate in the drawing process is 11%, the drawing speed is 800m/min, and the diameter of the copper alloy wire is 0.08 mm; then carrying out heat treatment on annealing equipment, wherein the heat treatment temperature is 800 ℃, the length of an annealing pipe is 1.5m, the heat treatment speed is 200m/min, pure alcohol is arranged at an outlet of an annealing pipe and used for cooling the tantalum-containing copper alloy wire after heat treatment, and the surface of the wire is dried by a high-pressure air knife;
and S5, rolling the tantalum-containing copper alloy wire subjected to the heat treatment in the step S4 on a double-roller mill into a tantalum-containing copper alloy strip with the required specification, wherein the diameter of a roller of the double-roller mill is 70mm, and the rolling speed of the double-roller mill is 200 m/min.
The tantalum-containing copper alloy wire/strip prepared in this example was tested for magnetic permeability, electrical conductivity and strength, with the same test standards and methods as in example 1.
The ratio of the width to the thickness of the tantalum-containing copper alloy wire/strip prepared in the example of the present invention was 18.
By testing the magnetic conductivity, the conductivity and the strength of the prepared tantalum-containing copper alloy wire/belt, the relative magnetic conductivity is 12, the conductivity is 84% IACS, and the tensile strength is 350 MPa.
Example 8
In the embodiment, the tantalum-containing copper alloy wire/strip comprises the following components in percentage by mass: tantalum: 0.4%, silver: 0.8%, iron: 0.04% and the balance copper.
In the preparation method of the tantalum-containing copper alloy wire/strip provided in the embodiment, 800g of copper-tantalum intermediate alloy, 80g of silver, 80g of copper-iron intermediate alloy and 9040g of copper are weighed in step S1. Other methods and steps are the same as those in embodiment 7, and are not described again here.
The tantalum-containing copper alloy wire/strip prepared in this example was tested for magnetic permeability, electrical conductivity and strength, with the same test standards and methods as in example 1.
The tantalum-containing copper alloy wire/strip prepared in this example had a width to thickness ratio of 18.
By testing the magnetic permeability, the electric conductivity and the strength of the prepared tantalum-containing copper alloy wire/belt, the relative magnetic permeability is 16, the electric conductivity is 74% IACS, and the tensile strength is 410 MPa.
Example 9
In the embodiment, the tantalum-containing copper alloy wire/strip comprises the following components in percentage by mass: tantalum: 0.8%, silver: 0.8%, iron: 0.3 percent of copper and the balance of copper.
In the preparation method of the tantalum-containing copper alloy wire/strip provided in the embodiment, 1600g of copper-tantalum intermediate alloy, 80g of silver, 600g of copper-iron intermediate alloy and 7720g of copper are weighed in step S1. Other methods and steps are the same as those in embodiment 7, and are not described again here.
The tantalum-containing copper alloy wire/strip prepared in this example was tested for magnetic permeability, electrical conductivity and strength, with the same test standards and methods as in example 1.
The ratio of the width to the thickness of the tantalum-containing copper alloy wire/strip prepared in this example was 20.
By testing the magnetic conductivity, the conductivity and the strength of the prepared tantalum-containing copper alloy wire/belt, the relative magnetic conductivity is 42, the conductivity is 55% IACS, and the tensile strength is 450 MPa.
Comparative example 1
The tantalum-containing copper alloy wire/strip in the comparative example comprises the following components in percentage by mass: tantalum: 0%, silver: 0.1%, iron: 0.04% and the balance copper.
In the preparation method of the tantalum-containing copper alloy wire/strip provided in the comparative example, 0g of copper-tantalum intermediate alloy, 10g of silver, 80g of copper-iron intermediate alloy and 9910g of copper are weighed in step S1.
Other method steps are the same as embodiment 5, and are not described herein again.
The tantalum-containing copper alloy wire/strip prepared in this comparative example was tested for magnetic permeability, conductivity and strength, with the same test standards and methods as in example 1.
The tantalum-containing copper alloy wire/strip prepared in this comparative example had a width to thickness ratio of 10.
By testing the magnetic conductivity, the conductivity and the strength of the prepared tantalum-containing copper alloy wire/belt, the relative magnetic conductivity is 1.1, the conductivity is 80% IACS, and the tensile strength is 320 MPa.
Comparative example 2
In this comparative example, the tantalum-containing copper alloy wire/strip in example 2 was replaced by a tantalum-containing copper alloy wire/strip comprising the following components in percentage by mass: tantalum: 0%, silver: 0%, iron: 0.04% and the balance copper.
Other method steps are the same as embodiment 2 and are not described herein again.
The tantalum-containing copper alloy wire/strip prepared in this comparative example was tested for magnetic permeability, conductivity and strength, with the same test standards and methods as in example 2.
The tantalum-containing copper alloy wire/strip prepared in this comparative example had a width to thickness ratio of 15.
By testing the magnetic conductivity, the conductivity and the strength of the prepared tantalum-containing copper alloy wire/belt, the relative magnetic conductivity is 1.2, the conductivity is 81% IACS, and the tensile strength is 300 MPa.
Comparative example 3
In this comparative example, the tantalum-containing copper alloy wire/strip in example 3 was replaced by a tantalum-containing copper alloy wire/strip comprising the following components in percentage by mass: tantalum: 0.4%, silver: 0%, iron: 0.04% and the balance copper.
Other method steps are the same as embodiment 3 and are not described herein again.
The tantalum-containing copper alloy wire/strip prepared in this comparative example was tested for magnetic permeability, conductivity and strength, with the same test standards and methods as in example 3.
The tantalum-containing copper alloy wire/strip prepared in this comparative example had a width to thickness ratio of 16.
By testing the magnetic conductivity, the conductivity and the strength of the prepared tantalum-containing copper alloy wire/belt, the relative magnetic conductivity is 23, the conductivity is 78% IACS, and the tensile strength is 400 MPa.
Table 1 below is performance data for tantalum-containing copper alloy wires/ribbons prepared in each example and comparative example.
TABLE 1 Properties of tantalum-containing copper alloy wires/ribbons of various examples and comparative examples
The performance data in the table can be obtained, in the embodiment of the invention, the alloy wire is rolled into the strip by adopting the small-diameter roller, the width and thickness ratio of the wire is improved, and a wider and thinner fine copper alloy strip is obtained, the width and thickness ratio of the tantalum-containing copper alloy wire in the embodiment of the invention is more than or equal to 10, and the prepared tantalum-containing copper alloy wire/strip has high magnetic permeability, high conductivity and high strength.
The above description is only exemplary of the invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the invention is intended to be covered by the appended claims.
Claims (10)
1. A preparation method of tantalum-containing copper alloy wires/strips is characterized by comprising the following steps:
s1, weighing the copper-tantalum intermediate alloy, the silver-copper-iron intermediate alloy and the copper according to the raw material ratio, placing the intermediate alloy, the silver-copper-iron intermediate alloy and the copper in a continuous casting machine filled with protective gas for high-temperature treatment, stirring an alloy melt after the alloy is completely melted, standing, cooling by cooling water, and then performing casting to obtain a continuously cast tantalum-containing copper alloy rod;
s2, drawing the continuously cast tantalum-containing copper alloy rod obtained in the step S1 on a wire drawing machine for multiple times to obtain a large-deformation tantalum-containing copper alloy rod;
s3, drawing the large-deformation tantalum-containing copper alloy rod obtained in the step S2 on a wire drawing machine to form a tantalum-containing copper alloy wire;
s4, performing micro-machining on the tantalum-containing copper alloy wire in the step S3, and then performing continuous heat treatment on annealing equipment to obtain the tantalum-containing copper alloy wire;
and S5, rolling the tantalum-containing copper alloy wire subjected to the heat treatment in the step S4 into a tantalum-containing copper alloy strip with the required specification on a double-roller mill.
2. The method for preparing a tantalum-containing copper alloy wire/strip according to claim 1, wherein the method for preparing the copper-tantalum master alloy in step S1 comprises: grinding copper and tantalum into powder, uniformly mixing the powder according to the mass ratio of 19:1, pressing the uniformly mixed powder into a cylinder, sintering the cylinder at high temperature under a vacuum condition, placing the cylinder in a vacuum suspension smelting furnace for first smelting after sintering is finished, and cooling to obtain a copper-tantalum intermediate alloy;
preferably, the vacuum condition is a degree of vacuum higher than 5.0 × 10-2Pa, the high-temperature sintering temperature is 500-900 ℃, and the sintering time is 2-5 h;
more preferably, the temperature of the first smelting is 3000-3100 ℃, and the time of the first smelting is 10-20 min.
3. The method for preparing a tantalum-containing copper alloy wire/strip according to claim 1, wherein the method for preparing the copper-iron master alloy in step S1 comprises: grinding copper and iron into powder, uniformly mixing the powder according to the mass ratio of 19:1, placing the powder in a vacuum suspension smelting furnace for second smelting, and cooling to obtain a copper-iron intermediate alloy;
preferably, the temperature of the second smelting is 1500-1700 ℃, and the time of the second smelting is 10-20 min.
4. The method for preparing the tantalum-containing copper alloy wire/strip as claimed in claim 1, wherein the high temperature treatment in the step S1 is specifically to vacuumize the continuous casting machine, the temperature is raised when the vacuum degree is higher than 5Pa, the vacuumization is stopped after the temperature is raised to 800 ℃ and protective gas is filled into the high vacuum continuous casting machine until the vacuum degree is 1.1-1.5MPa, and then the temperature is raised to 1700 ℃ continuously until the alloy is completely melted;
preferably, the protective gas is argon or nitrogen;
more preferably, the continuous casting machine is a vertically-extended structure continuous casting machine;
more preferably, the diameter of the continuously cast tantalum-containing copper alloy rod is 8-12 mm.
5. The method for preparing tantalum-containing copper alloy wire/strip according to claim 4, wherein the single-pass deformation rate of said drawing is not less than 30% when the diameter of said tantalum-containing copper alloy rod is not less than 3mm in step S2;
when the diameter of the tantalum-containing copper alloy rod is less than 3.0mm and is more than or equal to 1.3mm, the single-pass deformation rate of drawing is 15-25%;
preferably, the diameter of the tantalum-containing copper alloy rod with large deformation is 0.9-1.3 mm.
6. The method of making a tantalum-containing copper alloy wire/ribbon of claim 5, wherein said single pass deformation rate during said drawing in step S3 is between 7.0% and 12%;
preferably, the diameter of the tantalum-containing copper alloy wire drawn is 0.1 to 0.3 mm.
7. The method for preparing the tantalum-containing copper alloy wire/ribbon as claimed in claim 6, wherein the micro-machining in the step S4 is to draw the tantalum-containing copper alloy wire in the step S3 to a diameter of 0.04-0.08mm, the area reduction rate in the drawing process is 6.0-11.0%, and the drawing speed is 300-800 m/min.
8. The tantalum-containing copper alloy wire/strip as claimed in any one of claims 1 to 7, wherein the annealing equipment of step S4 has an annealing tube with a length of 1.5 to 5m, and pure alcohol is provided at the outlet of the annealing tube for cooling the tantalum-containing copper alloy wire after heat treatment;
the temperature of the heat treatment is 200-800 ℃, and the speed of the heat treatment is 20-200 m/min;
preferably, the diameter of the roller of the double-roller mill in the step S5 is 40-70mm, and the rolling speed of the double-roller mill is less than or equal to 300 m/min.
9. The tantalum-containing copper alloy wire/belt is characterized by comprising the following components in percentage by mass: tantalum: 0.01-1.0%, silver: 0.01-1.0%, iron: 0.01-0.5% and the balance of copper.
10. The tantalum-containing copper alloy wire/strip of claim 9, comprising the following components in mass percent: tantalum: 0.02-0.8%, silver: 0.03-0.8%, iron: 0.02-0.3% and the balance of copper.
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