CN111261317B - Preparation method of high-performance antioxidant copper conductor material for special cable - Google Patents
Preparation method of high-performance antioxidant copper conductor material for special cable Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/026—Alloys based on copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C13/00—Alloys based on tin
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/08—Tin or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/38—Wires; Tubes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0016—Apparatus or processes specially adapted for manufacturing conductors or cables for heat treatment
Abstract
The invention discloses a high-performance antioxidant copper conductor material for a special cable and a preparation method thereof, relates to the technical field of conductor materials for cables, and solves the problems that the existing copper conductor for the special cable is low in processability and cannot continuously maintain the antioxidant performance of the copper conductor under extreme working conditions such as high temperature, high oxygen and the like. The method comprises the following steps: s1 paying off: selecting a copper wire and placing the copper wire on a pay-off reel; s2 annealing: annealing the copper wire; s3 acid washing: drawing the copper wire into a pickling tank for pickling treatment; s4 tin and silver plating: drawing the copper wire into a tin-silver furnace for tin-silver plating treatment; s5 press working: drawing the copper wire into a wire drawing die for further wire drawing treatment; s6 performance heat treatment: drawing the copper wire into an induction heat treatment tunnel furnace for performance heat treatment; s7 take-up: and drawing the copper wire into a take-up reel, and cooling to obtain a finished product. The copper wire prepared by the method has the advantages of excellent mechanical property, oxidation resistance and electrical conductivity.
Description
Technical Field
The invention relates to the technical field of conductor materials for cables, in particular to a preparation method of a high-performance antioxidant copper conductor material for a special cable.
Background
In practical production application, copper is exposed in the air and is easily oxidized to form verdigris, the electrical conductivity of the verdigris is poor, the resistance of a copper conductor is increased, tinning of a copper wire can effectively prevent the insulating rubber from being sticky and the core of the copper wire from blackening and becoming brittle, and the weldability of the copper wire is improved. Therefore, most of the electric wires used for transmitting electric energy in applications are tin-plated copper conductors. However, the tinned copper conductor material of the cable needs to be processed in multiple steps in the production process, and needs to face a harsher use working condition in the application process, so that the copper conductor is required to have excellent processability and oxidation resistance.
At present, a certain gap exists between a tinned copper conductor of a cable produced in China and a product in a developed country, and the main problem is that the cable has low processability and cannot be used for more finely processing the copper conductor for a special cable; on the other hand, the copper conductor can not continuously maintain the oxidation resistance of the copper conductor under the extreme working conditions of high temperature, high oxygen and the like. Therefore, the development of a high-performance oxidation-resistant copper conductor for special cables is a problem to be solved urgently in the field of cables.
Disclosure of Invention
The invention aims to provide a preparation method of a high-performance antioxidant copper conductor material for a special cable, wherein the surface layer of a prepared copper conductor is provided with a Cu-Sn-Ag metal compound layer in gradient distribution, and beta-Sn and Cu are respectively distributed in the compound layer from the surface to the inside3Sn、Cu5The Sn metal compound has a special structure, so that the Sn metal compound has excellent mechanical property, oxidation resistance and conductivity.
The technical purpose of the invention is realized by the following technical scheme:
a method for preparing a high-performance anti-oxidation copper conductor material for a special cable comprises the steps of arranging a Cu-Sn-Ag metal layer in gradient distribution on the surface layer of a prepared copper conductor, and respectively distributing beta-Sn, Cu3Sn and Cu5Sn metal compounds from the surface to the inside; the preparation method comprises the following steps:
s1, paying off: selecting a copper wire and placing the copper wire on a pay-off reel;
s2, annealing: annealing the copper wire drawn in the S1;
s3, acid washing: drawing the annealed copper wire in S2 into a pickling tank for pickling treatment;
s4, tin and silver plating: drawing the copper wire subjected to acid washing in the step S3 into a tin-silver furnace for tin-silver plating treatment, wherein the tin-silver plating temperature is 330-460 ℃, and the tin-silver plating time is 50-70 min;
s5, press processing: drawing the copper wire plated with the tin and silver S4 into a wire drawing die for further wire drawing treatment, wherein the deformation rate of the copper wire is 50% and the wire drawing temperature is 280-340 ℃ in the wire drawing process;
s6, performance heat treatment: drawing the copper wire processed by the pressure of S5 into an induction heat treatment tunnel furnace for performance heat treatment, wherein the treatment temperature is 460-620 ℃, and the treatment time is 50-70 min;
s7, taking up: and drawing the treated copper wire in the S6 into a take-up reel, and cooling to obtain a finished product.
Furthermore, in the step S2, an electric induction heat treatment tunnel furnace is adopted for annealing treatment, wherein the annealing temperature is 350-550 ℃, and the annealing time is 50-70 min.
Furthermore, in the step S3, the pickling solution comprises 6-8 mol/L hydrochloric acid, 60-80 g/L stannic chloride, 30-75 g/L sodium fluoride, 90-102 g/L zinc chloride, and 120-155 g/L cupric oxalate, and the pickling temperature is 50-60 ℃ and the pickling time is 50-70 min.
Furthermore, in step S4, the tin-silver solution in the tin-silver furnace contains 7.6 to 11.8 atomic% of silver and 92.4 to 88.2 atomic% of tin.
Further, the cooling method in step S7 is natural cooling.
In conclusion, the invention has the following beneficial effects:
1. gradient structure of conductor surface layer: the invention obtains a Cu-Sn-Ag metal compound layer with gradient distribution on the surface layer of a copper conductor, wherein beta-Sn and Cu are respectively distributed in the Cu-Sn-Ag metal compound layer from the surface to the inside through seven steps of paying-off, annealing, pickling, tinning and silver plating, pressure processing, performance heat treatment and taking-up3Sn、Cu5Specific structure of Sn metal compound. Wherein Cu3Sn and Cu5The Sn metal compound phase formation activation energy is very large and cannot be obtained by the conventional means. According to the invention, a pressure processing mode at 280-340 ℃ is adopted, so that high deformation pressure is provided while temperature is provided for a copper conductor, and a structure of a tin-silver plated layer has Cu3The ability to form Sn phases, and thus a layer of Cu3And Sn structure. Further, by means of subsequent 460-620 ℃ performance heat treatment for 50-70 min, a large amount of Sn and Ag on the surface layer are diffused inwards, and Cu on the innermost layer is promoted3Further transformation of Sn structure into Cu5A Sn phase;
2. excellent mechanical properties: in the invention, beta-Sn and Cu are respectively distributed on the surface of a copper conductor from the outside to the inside by a preparation process3Sn、Cu5Specific structure of Sn metal compound. Wherein, Cu3Sn and Cu5Sn has good comprehensive mechanical property, and is distributed on the surface layer of the copper conductor, so that the comprehensive mechanical property of the copper conductor can be enhanced;
3. excellent oxidation resistance: in the invention, beta-Sn and Cu are respectively distributed on the surface of a copper conductor from the outside to the inside by a preparation process3Sn、Cu5Specific structure of Sn metal compound. beta-Sn, Cu3Sn and Cu5The Sn layer has good oxidation resistance, and the integral oxidation resistance of the copper conductor can be improved;
4. excellent conductivity: the conductivity of the copper conductor is obviously improved by a large amount of solid-dissolved Ag atoms on the surface of the copper conductor. Furthermore, Cu3Sn and Cu5The Sn phase has a higher nuclear free electron layer, and the conductivity of the copper conductor can be further improved.
Drawings
FIG. 1 is a microstructure diagram of a copper conductor material according to the present invention.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings, and the present embodiment is not to be construed as limiting the invention.
The invention provides a high-performance antioxidant copper conductor material for a special cable, as shown in figure 1, a Cu-Sn-Ag metal layer in gradient distribution is arranged on the surface layer of a copper conductor; the Cu-Sn-Ag metal compound layer with gradient distribution is respectively distributed with beta-Sn and Cu from the surface to the inside3Sn、Cu5A Sn metal compound.
The invention also provides a preparation method of the high-performance antioxidant copper conductor material for the special cable, which is described by the following specific examples:
example 1:
the embodiment 1 provides a preparation method of a high-performance antioxidant copper conductor material for a special cable, which includes the following steps:
s1, paying off: selecting copper wires with the diameter of 0.42mm and meeting the national standard requirement, and placing the copper wires on a pay-off reel;
s2, annealing: annealing the copper wire drawn in the S1 by adopting an electric induction heat treatment tunnel furnace, wherein the treatment conditions are as follows: the temperature is 350 ℃, and the time is 70 min;
s3, acid washing: drawing the annealed copper wire in S2 into a pickling tank for pickling treatment, wherein the pickling conditions are as follows: the temperature is 50 ℃, the time is 70min, and the pickling solution comprises the following components: 6mol/L hydrochloric acid, 60g/L stannic chloride, 30g/L sodium fluoride, 90g/L zinc chloride and 120g/L cupric oxalate;
s4, tin and silver plating: drawing the copper wire subjected to acid washing in the step S3 into a tin-silver furnace for tin-silver plating treatment, wherein the tin-silver plating conditions are as follows: the temperature is 330 ℃, the time is 70min, and the tin-silver liquid in the tin-silver furnace comprises 11.8 percent of silver and 88.2 percent of tin according to atomic percentage;
s5, press processing: drawing the S4 tinned and silvered copper wire into a wire drawing die with the diameter of 0.21mm (namely the deformation rate of the copper wire is 50%), and further drawing the wire at the wire drawing temperature of 280 ℃;
s6, performance heat treatment: drawing the copper wire processed by the pressure of S5 into an induction heat treatment tunnel furnace for performance heat treatment, wherein the treatment conditions are as follows: the temperature is 460 ℃, and the time is 70 min;
s7, taking up: and drawing the treated copper wire in the S6 into a take-up reel, and naturally cooling to obtain a finished product.
Example 2:
the embodiment 2 provides a manufacturing method of a high-performance antioxidant copper conductor material for a special cable, which comprises the following steps: the method comprises the following steps:
s1, paying off: selecting copper wires with the diameter of 0.42mm and meeting the national standard requirement, and placing the copper wires on a pay-off reel;
s2, annealing: annealing the copper wire drawn in the S1 by adopting an electric induction heat treatment tunnel furnace, wherein the treatment conditions are as follows: the temperature is 450 ℃ and the time is 60 min. (ii) a
S3, acid washing: drawing the annealed copper wire in S2 into a pickling tank for pickling treatment, wherein the pickling conditions are as follows: the temperature is 55 ℃, the time is 60min, and the pickling solution comprises the following components: 7mol/L hydrochloric acid, 70g/L stannic chloride, 55g/L sodium fluoride, 96g/L zinc chloride and 135g/L cupric oxalate;
s4, tin and silver plating: drawing the copper wire subjected to acid washing in the step S3 into a tin-silver furnace for tin-silver plating treatment, wherein the tin-silver plating conditions are as follows: the temperature is 400 ℃, the time is 60min, and the tin-silver liquid in the tin-silver furnace contains 10% of silver and 90% of tin according to the atomic ratio;
s5, press processing: drawing the S4 tinned copper wire into a wire drawing die with the diameter of 0.21mm (namely the deformation rate of the copper wire is 50%), and further drawing the wire at the temperature of 300 ℃;
s6, performance heat treatment: drawing the copper wire processed by the pressure of S5 into an induction heat treatment tunnel furnace for performance heat treatment, wherein the treatment conditions are as follows: the temperature is 500 ℃, and the time is 60 min;
s7, taking up: and drawing the treated copper wire in the S6 into a take-up reel, and naturally cooling to obtain a finished product.
Example 3:
the embodiment 3 provides a manufacturing method of a high-performance antioxidant copper conductor material for a special cable, which comprises the following steps: the method comprises the following steps:
s1, paying off: selecting copper wires with the diameter of 0.42mm and meeting the national standard requirement, and placing the copper wires on a pay-off reel;
s2, annealing: annealing the copper wire drawn in the S1 by adopting an electric induction heat treatment tunnel furnace, wherein the treatment conditions are as follows: the temperature is 550 ℃, and the time is 50 min;
s3, acid washing: drawing the annealed copper wire in S2 into a pickling tank for pickling treatment, wherein the pickling conditions are as follows: the temperature is 60 ℃, the time is 50min, and the pickling solution comprises the following components: 8mol/L hydrochloric acid, 80g/L stannic chloride, 75g/L sodium fluoride, 102g/L zinc chloride and 155g/L cupric oxalate;
s4, tin and silver plating: drawing the copper wire subjected to acid washing in the step S3 into a tin-silver furnace for tin-silver plating treatment, wherein the tin-silver plating conditions are as follows: the temperature is 460 ℃, the time is 50min, and the tin-silver liquid in the tin-silver furnace comprises 7.6 percent of silver and 92.4 percent of tin according to atomic percentage;
s5, press processing: drawing the S4 tinned and silvered copper wire into a wire drawing die with the diameter of 0.21mm (namely the deformation rate of the copper wire is 50%), and further drawing the wire at the temperature of 340 ℃;
s6, performance heat treatment: drawing the copper wire processed by the pressure of S5 into an induction heat treatment tunnel furnace for performance heat treatment, wherein the treatment conditions are as follows: the temperature is 620 ℃, and the time is 50 min;
s7, taking up: and drawing the treated copper wire in the S6 into a take-up reel, and naturally cooling to obtain a finished product.
Comparative example 1:
this comparative example provides a method for producing a high-performance oxidation-resistant copper conductor material for a special cable, which comprises the steps substantially the same as those of example 3, except that the tin-silver solution in step S4 is replaced with a pure tin solution.
Comparative example 2:
this comparative example provides a method for manufacturing a high-performance oxidation-resistant copper conductor material for specialty cables, which is substantially the same as that of example 3 except that step S5 is eliminated.
Comparative example 3:
this comparative example provides a method for producing a high-performance oxidation-resistant copper conductor material for special cables, which comprises the steps substantially the same as those of example 3, except that the heat treatment conditions in step S6 were changed to: the temperature is 300 ℃ and the time is 80 min.
Comparative example 4:
this comparative example provides a method for producing a high-performance oxidation-resistant copper conductor material for special cables, which comprises the steps substantially the same as those of example 3, except that the heat treatment conditions in step S6 were changed to: the temperature is 650 ℃ and the time is 40 min.
Comparative example 5:
this comparative example provides a commercially available tin-plated copper wire (Shanghai Yi first wire and Cable Co., Ltd., model No. UL1015, cat No. 2018212210).
The copper conductor materials in the embodiments and the comparative examples are tested for mechanical property, resistivity and oxidation resistance, wherein the mechanical property refers to a determination method disclosed in a GB/T10623-2008 metal material mechanical property test; the resistivity is determined by the measuring method disclosed in the conductor of the GB/T3956-2008 cable; the oxidation resistance test condition is that the oxidation weight gain is measured after the heat preservation is carried out for 250 hours at 150 ℃ in an oxygen environment.
The comprehensive performance data comparison of the high-performance antioxidant copper conductor material for the special cable obtained by the preparation method is shown in the following table 1:
TABLE 1 comparison of the comprehensive Performance data of copper conductor materials
As can be seen from Table 1:
(1) comparing examples 1-3 with comparative examples 1-5, it can be seen that the high-performance antioxidant copper conductor material for special cables prepared by the invention in examples 1-3 has excellent mechanical properties, conductivity and antioxidant property;
(2) as can be seen from comparison of example 3 with comparative examples 1 and 5, the conductivity and oxidation resistance of the tin-silver-plated copper conductor are more excellent than those of the tin-plated copper conductor;
(3) as can be seen by comparing the example 3 with the comparative example 2, the copper conductor material after being processed by pressure has more excellent conductivity, mechanical property and oxidation resistance;
(4) comparing example 3 with comparative examples 3 and 4, it can be seen that the copper conductor obtained within the range of the performance heat treatment of the present invention is more excellent in conductivity, mechanical properties and oxidation resistance;
(5) comparing example 3 with comparative example 5, it can be seen that the high-performance antioxidant copper conductor material for special cables prepared by the invention has better conductivity, mechanical property and antioxidant property than the commercial similar material copper conductor.
In conclusion, the product obtained by the invention has excellent mechanical property, conductivity and oxidation resistance, can overcome the defects of the prior art, and can solve the problems of processability and oxidation resistance of the special cable.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.
Claims (5)
1. A preparation method of a high-performance antioxidant copper conductor material for a special cable is characterized by comprising the following steps: the surface layer of the prepared copper conductor is provided with a Cu-Sn-Ag metal layer in gradient distribution, and beta-Sn and Cu are respectively distributed from the surface to the inside3Sn、Cu5A Sn metal compound; the preparation method comprises the following steps:
s1, paying off: selecting a copper wire and placing the copper wire on a pay-off reel;
s2, annealing: annealing the copper wire drawn in the S1;
s3, acid washing: drawing the annealed copper wire in S2 into a pickling tank for pickling treatment;
s4, tin and silver plating: drawing the copper wire subjected to acid washing in the step S3 into a tin-silver furnace for tin-silver plating treatment, wherein the tin-silver plating temperature is 330-460 ℃, and the tin-silver plating time is 50-70 min;
s5, press processing: drawing the copper wire plated with the tin and silver S4 into a wire drawing die for further wire drawing treatment, wherein the deformation rate of the copper wire is 50% and the wire drawing temperature is 280-340 ℃ in the wire drawing process;
s6, performance heat treatment: drawing the copper wire processed by the pressure of S5 into an induction heat treatment tunnel furnace for performance heat treatment, wherein the treatment temperature is 460-620 ℃, and the treatment time is 50-70 min;
s7, taking up: and drawing the treated copper wire in the S6 into a take-up reel, and cooling to obtain a finished product.
2. The preparation method of the high-performance antioxidant copper conductor material for the special cable according to claim 1, characterized by comprising the following steps: in the step S2, an electric induction heat treatment tunnel furnace is adopted for annealing treatment, the annealing temperature is 350-550 ℃, and the annealing time is 50-70 min.
3. The preparation method of the high-performance antioxidant copper conductor material for the special cable according to claim 1, characterized by comprising the following steps: in the step S3, the pickling solution comprises 6-8 mol/L hydrochloric acid, 60-80 g/L stannic chloride, 30-75 g/L sodium fluoride, 90-102 g/L zinc chloride and 120-155 g/L cupric oxalate, and the pickling temperature is 50-60 ℃ and the pickling time is 50-70 min.
4. The preparation method of the high-performance antioxidant copper conductor material for the special cable according to claim 1 or 3, characterized by comprising the following steps: in the step S4, the tin-silver liquid in the tin-silver furnace contains 7.6-11.8 atomic% of silver and 92.4-88.2 atomic% of tin.
5. The preparation method of the high-performance antioxidant copper conductor material for the special cable according to claim 1, characterized by comprising the following steps: the cooling method in step S7 is natural cooling.
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| CN113249674B (en) * | 2021-05-13 | 2022-07-05 | 江西泰和百盛实业有限公司 | Production process of tinned copper wire capable of preventing tinned layer from falling off |
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| CN111261317A (en) | 2020-06-09 |
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