CN111778417B - Preparation method of CuFeP alloy wire for shielding - Google Patents
Preparation method of CuFeP alloy wire for shielding Download PDFInfo
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- CN111778417B CN111778417B CN202010543919.0A CN202010543919A CN111778417B CN 111778417 B CN111778417 B CN 111778417B CN 202010543919 A CN202010543919 A CN 202010543919A CN 111778417 B CN111778417 B CN 111778417B
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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
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/047—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire of fine wires
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—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
- 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
Abstract
The invention discloses a preparation method of CuFeP alloy wire for shielding, which relates to the technical field of shielding materials, wherein vacuum melting is carried out according to the proportion of each element and a specific adding mode, metal ingot blanks with the diameter of 210 plus 230mm are poured, and then forging, hot rolling, grinding and polishing, extruding, straight pulling and disc pulling are carried out on the metal ingots.
Description
Technical Field
The invention relates to the technical field of shielding materials, in particular to a preparation method of a CuFeP alloy wire for shielding.
Background
The shielding wiring system is from Europe, and is characterized in that a metal shielding layer is added outside a common non-shielding wiring system, and the functions of preventing electromagnetic interference and electromagnetic radiation are realized by utilizing the reflection, absorption and skin effect of the metal shielding layer. Electromagnetic shielding in a certain region of the space, means for reducing the field strength caused by certain sources. In most cases, the shield can be made of metal such as copper, steel, etc., but for constant and very low frequency magnetic fields, materials such as ferrite can also be used as the shield. Electromagnetic noise or interference is often generated in one system or among different systems to cause system performance deterioration, so that firstly, the power line or the magnetic line is required to be limited in a certain area; secondly, a certain area is not influenced by external electric force lines and magnetic force lines. With the rapid development of materials and optoelectronic information science, more and more electrified power devices appear in life, and the problem of electromagnetic radiation interference generated therewith becomes a concern, the electromagnetic radiation interference can influence surrounding electronic and electric equipment, cause misoperation, image obstacle or sound obstacle, even cause serious social problems such as information leakage of the electronic and electric equipment, and cause harm to human bodies, so that the requirement on the performance of the electromagnetic shielding material is higher and higher.
In the 5G era at present, different devices, from high-power signal transmission and frequency heating industrial devices to measuring, detecting and testing instruments with different purposes, daily communication devices and the like, are sources of electromagnetic radiation, so that the shielding requirements of related transmission cables are higher and higher, and higher requirements are also put forward on electromagnetic materials. The CuFeP wire is prepared by vacuum melting, forging, hot rolling, grinding and polishing, extruding, straight pulling and disc pulling processes based on meeting the requirements of copper alloy raw material wires for high-end transmission shielding wires, so that the shielding problem of 5G communication transmission cables is solved, and meanwhile, the CuFeP wire contributes to the development of the safety, accuracy and integrity of 5G signal transmission.
Disclosure of Invention
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a preparation method of CuFeP alloy wire for shielding is characterized by comprising the following steps:
s1: vacuum smelting: preparing high-purity CuFe and CuSn intermediate alloy by using vacuum smelting equipment, and then mixing the intermediate alloy and a high-purity electrolytic copper plate according to the weight percentage: cu-0.05-0.5 wt.% Fe-0.015-0.8 wt.% P-0.05-0.15 wt.% Sn, smelting, adding 0.01-0.02 wt.% Ce in the standing process of the solution, then carrying out electromagnetic stirring for 30min, then casting into a metal ingot with the diameter of 210-230mm and the length of 1.5-3m, inspecting the surface of the metal ingot, and carrying out S2 on the qualified metal ingot;
s2: forging and hot rolling: keeping the temperature of the metal ingot obtained in the S1 at 900 ℃ for 0.5-1h at 800-;
s3: extruding: heating the CuFeP alloy bar obtained in S2 to 800-950 ℃, preserving heat for 0.5-1h, conveying the CuFeP alloy bar into an extrusion cylinder through a material conveying belt, carrying out large-diameter-changing forward hot extrusion deformation on the CuFeP alloy bar, reducing the diameter to 15-30mm, checking the surface defect of the CuFeP alloy bar, cutting off the head and the tail of the CuFeP alloy bar without the surface defect of the bar, and obtaining the reduced-diameter CuFeP alloy bar;
s4: straightening and coiling: continuously reducing the diameter of the reduced CuFeP alloy bar obtained in S3 by using a 3-5-ton hydraulic automatic drawing machine for cold drawing deformation, firstly drawing for 4-7 times, wherein the diameter reducing range of each drawing is 1-3mm until the diameter of the reduced CuFeP alloy bar reaches 9-12mm, then carrying out intermediate annealing treatment by using a common solution box type furnace, wherein the annealing temperature range is 800-; taking out the reduced CuFeP alloy bar stock for polishing, then drawing the polished reduced CuFeP alloy bar stock for 4-7 times, wherein the diameter reducing range of each drawing is 0.5-2mm until the diameter of the reduced CuFeP alloy bar stock reaches 4-7mm, then carrying out intermediate annealing treatment on the obtained reduced CuFeP alloy bar stock by adopting a solid solution box type furnace, wherein the annealing temperature range is 750 plus materials and 850 ℃, and the heat preservation time is 30-60 min; polishing again, drawing for 18-25 times until the diameter is 1-3mm, and then performing intermediate annealing under the protection of argon atmosphere at the annealing temperature of 400-500 ℃ for 1-2h to obtain a wire initial product;
s5: grinding and polishing: grinding and polishing the surface of the primary wire product obtained in the step S4 by using scouring cloth, drawing the primary wire product subjected to grinding and polishing for 4-7 times, wherein the diameter reducing range of each drawing is 0.125-0.214mm, and finally, coiling the primary wire product subjected to grinding and polishing into a wire with the diameter of 0.5-1.5 mm;
s6: and (3) carrying out aging treatment on the wire material obtained in the step (S5) under the protection of argon atmosphere, wherein the temperature range of the aging treatment is 350-450 ℃, straightening the obtained wire material, cutting the straightened wire material into fixed-size wires to obtain a finished wire material, and packaging the finished wire material.
Further, in the step S5, the polishing is performed by using scouring pad in a pool containing polishing powder, the polishing powder is aluminum oxide, and the polishing powder is added to improve the polishing efficiency and save the polishing time.
Further, in the step S1, the vacuum melting is performed by a roots pump, the vacuum degree in the furnace is 0-5pa, the gas leakage degree in the furnace is 1pa/min, the vacuum degree in the furnace is stable, and on the premise of improving the melting efficiency, the oxygen content in the furnace is reduced, and the stable performance of the product is ensured.
Furthermore, the air extraction speed of the Roots pump is 3L/s, the limit vacuum degree is 0.05pa, the pumping efficiency of the Roots pump is high, and the vacuum degree in the furnace required by metal heating can be maintained.
Furthermore, before the step S1, a power supply system of the vacuum melting furnace needs to be checked to ensure that the cooling water temperature of the capacitor is normal, the oil temperature of the transformer is normal, and the cooling water of the cable is normal, the vacuum system is checked to ensure that the oil level of the vacuum pump is normal, the filter screen is switched normally, and the isolation valve is sealed normally, so that the power supply system and the vacuum system can be checked to prevent the occurrence of accidental events such as damage of a machine and the occurrence of an accident of an operator during heating, and meanwhile, the stability of the product performance is improved.
Further, the packaging process in the S6 comprises the steps of passivating, rinsing, drying, film wrapping and boxing of finished wire products, wherein the passivation is beneficial to preventing oxidation of the metal surface and ensures the quality of the wire products.
Further, a copper alloy passivation solution DH680 is adopted in the passivation process, and the passivation solution is good in using effect.
Further, in the vacuum melting in S1, it is necessary to perform deoxidation treatment on the molten metal after the metal is melted, and the deoxidation method is hydrogen deoxidation, in which the oxide in the molten metal is reduced by the hydrogen deoxidation method, and the generated compound is pumped out of the vacuum furnace by the vacuum pump, thereby reducing the oxygen content in the molten metal.
Has the advantages that:
compared with the shielding material sold in the market, the shielding material has the characteristics of high shielding property, wide frequency band for shielding electromagnetic waves, miniaturization, light weight and low manufacturing cost, the shielding requirement of related transmission cables is higher and higher along with the arrival of 5G, and the shielding material also puts forward higher and higher requirements on electromagnetic materials.
Detailed Description
Example 1
A preparation method of CuFeP alloy wire for shielding is characterized by comprising the following steps:
s1: vacuum smelting: need to inspect the electrical power generating system of vacuum melting furnace, guarantee that condenser cooling water temperature is normal, transformer oil temperature is normal, the cooling water of cable is normal, inspect vacuum system, guarantee that vacuum pump oil level is normal, the filter screen switching is normal, isolation valve seals normally, inspection electrical power generating system and vacuum system can prevent when heating that the machine from damaging and operating personnel's accident takes place, improve the stability of producing the performance simultaneously, prepare high-purity CuFe, CuSn intermediate alloy through vacuum melting equipment, do intermediate alloy and high-purity electrolysis copper according to weight percent again: cu0.05wt.% Fe0.015wt.% P0.05wt.% Sn ingredient smelting, the impurity content in the intermediate alloy and the high-purity electrolytic copper plate is limited to 0.005% by mass percentage, the quality of the raw material is controlled, the qualification rate in the subsequent steps can be effectively improved, after 0.01 wt.% Ce is added in the standing process of the solution, the vacuum smelting is carried out by adopting a roots pump, the vacuum degree in the furnace is 0.05pa, the gas leakage degree in the furnace is 1pa/min, the vacuum degree in the furnace is stable, on the premise of improving the smelting efficiency, the oxygen content in the furnace is reduced, the stable performance of the product is ensured, the gas extraction rate of the pumps is 3L/s, the limit vacuum degree is 0.05pa, the pumping efficiency of the roots pump is high, the vacuum degree in the furnace required by metal heating can be maintained, then electromagnetic stirring is carried out for 30min, in the vacuum smelting, the metal liquid needs to be deoxidized after the metal is melted, the deoxidizing mode is hydrogen deoxidizing mode, the oxide in the, pumping the generated compound out of the vacuum furnace through a vacuum pump, reducing the oxygen content in the molten metal, casting the compound into a metal ingot with the diameter of 210mm and the length of 1.5m, inspecting the surface of the metal ingot, and then carrying out S2 on the qualified metal ingot, wherein the qualified standard of the metal ingot is that the surface of a metal ingot bar has no obvious loose or shrinkage cavity, the unqualified metal ingot is picked out in time, the useless work in production is reduced, and the production efficiency is improved;
s2: forging and hot rolling: keeping the temperature of the metal ingot obtained in the step S1 at 800 ℃ for 0.5h, rolling the metal ingot to 140mm, turning the surface of a copper alloy bar by a lathe for 1mm, then carrying out cold rotary swaging on the copper alloy bar to 120mm, then machining the copper alloy bar by a lathe for 200mm in length to obtain a CuFeP alloy bar, checking the CuFeP alloy bar, and carrying out the step S3 on the qualified CuFeP alloy bar, wherein the qualification standard of the CuFeP alloy bar is that no crack exists on the surface of the bar, oxidized impurities exist and peeling exists, the quality and performance of a finished product are seriously influenced by the characteristics, and the production resources in the production can be effectively saved are timely selected;
s3: extruding: heating the CuFeP alloy bar stock obtained in the S2 to 800 ℃, preserving heat for 0.5h, conveying the CuFeP alloy bar stock into an extrusion cylinder through a material conveying belt, carrying out large-reducing forward hot extrusion deformation on the CuFeP alloy bar stock, reducing the diameter to 15mm, checking the surface defect of the CuFeP alloy bar stock, cutting off the head and the tail of the CuFeP alloy bar stock without the surface defect of the bar stock, and obtaining the reduced-diameter CuFeP alloy bar stock;
s4: straightening and coiling: continuously reducing the diameter of the reduced CuFeP alloy bar obtained in the step S3 by using a 3-ton hydraulic automatic drawing machine for cold drawing deformation, firstly drawing for 4 times, wherein the diameter reducing range of each drawing is 1mm until the diameter of the reduced CuFeP alloy bar reaches 9mm, and then carrying out intermediate annealing treatment by using a common solution box type furnace, wherein the annealing temperature range is 800 ℃, and the heat preservation time is 0.5 h; taking out the reduced CuFeP alloy bar stock for polishing, then drawing the polished reduced CuFeP alloy bar stock for 4 times, wherein the diameter reducing range of each drawing is 0.5mm until the diameter of the reduced CuFeP alloy bar stock reaches 4mm, then carrying out intermediate annealing treatment on the obtained reduced CuFeP alloy bar stock by adopting a solid solution box type furnace, wherein the annealing temperature range is 750 ℃, and the heat preservation time is 30 min; carrying out 18-pass drawing after polishing again, drawing to the diameter of 1mm, carrying out intermediate annealing under the protection of 99.99% argon atmosphere, keeping the annealing temperature at 400 ℃, keeping the temperature for 1h to obtain a wire initial product, polishing by an LD-201700 polishing and polishing robot produced by Dongguan intelligent science and technology company, automatically polishing by a mechanical arm, establishing a production line, and improving the production efficiency to a great extent and saving the cost;
s5: grinding and polishing: grinding and polishing the surface of the wire primary product obtained in the step S4 by using scouring cloth, drawing the ground wire primary product by 47 times, wherein the drawing diameter-reducing range of each drawing is 0.125mm, and finally drawing and coiling the wire primary product into a wire with the diameter of 0.5mm, wherein the drawing process adopts JH4304 copper alloy wire drawing liquid produced by Xian Jia Hongyani Limited company, the drawing liquid can reduce the resistance generated in the drawing process, the grinding and polishing are carried out by using the scouring cloth in a tank containing polishing powder, the polishing powder adopts aluminum oxide, and the polishing powder can improve the grinding and polishing efficiency and save the grinding and polishing time;
s6: and (2) carrying out aging treatment on the wire material obtained in the step (S5) under the protection of 99.99% argon atmosphere, wherein the temperature range of the aging treatment is 350 ℃, straightening the obtained wire material, cutting the straightened wire material into 2m size to obtain a finished wire material, and packaging the finished wire material, wherein the packaging process comprises passivation, rinsing, drying, film wrapping and boxing of the finished wire material, the passivation is favorable for preventing oxidation of the metal surface, and the quality of the wire material is ensured, and the passivation process adopts copper alloy passivation solution DH680, so that the passivation solution has a good use effect.
Example 2
A preparation method of CuFeP alloy wire for shielding is characterized by comprising the following steps:
s1: vacuum smelting: need to inspect the electrical power generating system of vacuum melting furnace, guarantee that condenser cooling water temperature is normal, transformer oil temperature is normal, the cooling water of cable is normal, inspect vacuum system, guarantee that vacuum pump oil level is normal, the filter screen switching is normal, isolation valve seals normally, inspection electrical power generating system and vacuum system can prevent when heating that the machine from damaging and operating personnel's accident takes place, improve the stability of producing the performance simultaneously, prepare high-purity CuFe, CuSn intermediate alloy through vacuum melting equipment, do intermediate alloy and high-purity electrolysis copper according to weight percent again: cu-0.5 wt.% Fe-0.8 wt.% P-0.15 wt.% Sn, smelting, wherein the impurity content in the intermediate alloy and the high-purity electrolytic copper plate is limited to 0.001% by mass percentage, the quality of the raw materials is controlled to effectively improve the qualification rate in the subsequent steps, after 0.02 wt.% Ce is added in the standing process of the solution, vacuum smelting is carried out by adopting a roots pump, the vacuum degree in the furnace is 2pa, the gas leakage degree in the furnace is 1pa/min, the vacuum degree in the furnace is stable, on the premise of improving the smelting efficiency, the oxygen content in the furnace is reduced, the stable performance of the product is ensured, the gas extraction rate of the pumps is 3L/s, the ultimate vacuum degree is 0.05pa, the pumping efficiency of the roots pump is high, the vacuum degree in the furnace required by metal heating can be maintained, then electromagnetic stirring is carried out for 30min, in the vacuum smelting, the metal liquid needs to be deoxidized after the metal is melted, the deoxidizing, reducing oxides in the hydrogen deoxidation type molten metal, pumping the generated compounds out of a vacuum furnace through a vacuum pump, reducing the oxygen content in the molten metal, then casting into a metal ingot with the diameter of 230mm and the length of 3m, inspecting the surface of the metal ingot, and then carrying out S2 on the qualified metal ingot, wherein the surface of a metal ingot bar has no obvious looseness or shrinkage cavity, and the unqualified metal ingot is picked out in time, so that useless work in production is reduced, and the production efficiency is improved;
s2: forging and hot rolling: keeping the temperature of the metal ingot obtained in the step S1 at 900 ℃ for 1h, rolling the metal ingot to 160mm, turning the surface of a copper alloy bar by a lathe for 2mm, then performing cold rotary swaging on the copper alloy bar to 130mm, then machining the copper alloy bar by a turning saw until the length of the copper alloy bar is 210mm to obtain a CuFeP alloy bar, checking the CuFeP alloy bar, and performing the step S3 on the qualified CuFeP alloy bar;
s3: extruding: heating the CuFeP alloy bar obtained in the S2 to 950 ℃, preserving heat for 1h, conveying the CuFeP alloy bar into an extrusion cylinder through a material conveying belt, carrying out large-reducing forward hot extrusion deformation on the CuFeP alloy bar, reducing the diameter to 30mm, checking the surface defect of the CuFeP alloy bar, cutting off the head and the tail of the CuFeP alloy bar without the surface defect of the bar, and obtaining the reduced CuFeP alloy bar, wherein the CuFeP alloy bar has the qualification standards of no crack, oxidation inclusion and peeling on the surface of the bar, the quality and the performance of a finished product are seriously influenced by the characteristics, and the production resources in production can be effectively saved;
s4: straightening and coiling: continuously reducing the diameter of the reduced CuFeP alloy bar obtained in the S3 by using a 5-ton hydraulic automatic drawing machine for cold drawing deformation, firstly drawing for 7 times, wherein the diameter reducing range of each drawing is 3mm until the diameter of the reduced CuFeP alloy bar reaches 12mm, and then carrying out intermediate annealing treatment by using a common solution box type furnace, wherein the annealing temperature range is 900 ℃, and the heat preservation time is 0.5-3 h; taking out the reduced CuFeP alloy bar stock for polishing, then carrying out 7-pass drawing on the polished reduced CuFeP alloy bar stock, wherein the diameter reducing range of each drawing is 2mm until the diameter of the reduced CuFeP alloy bar stock reaches 7mm, then carrying out intermediate annealing treatment on the obtained reduced CuFeP alloy bar stock by adopting a solid solution box type furnace, wherein the annealing temperature range is 850 ℃, and the heat preservation time is 60 min; carrying out drawing for 25 times after polishing again, drawing to a diameter of 3mm, carrying out intermediate annealing under the protection of 99.6% argon atmosphere, keeping the annealing temperature at 500 ℃ for 2h to obtain a wire initial product, polishing by an LD-20-1700 polishing and polishing robot produced by Dongguan electrical intelligent technology company, automatically polishing by a mechanical arm, establishing a production line, and improving the production efficiency to a great extent and saving the cost;
s5: grinding and polishing: grinding and polishing the surface of the wire primary product obtained in the step S4 by using scouring cloth, drawing the ground wire primary product by 7 times, wherein the drawing diameter-reducing range of each drawing is 0.214mm, and finally, drawing and coiling the wire primary product into a wire with the diameter of 1.5mm, the drawing process adopts JH4304 copper alloy wire drawing liquid produced by Xian Jia Hongyani Limited company, the drawing liquid can reduce the resistance generated in the drawing process, the grinding and polishing are carried out by using the scouring cloth in a tank containing polishing powder, the polishing powder adopts aluminum oxide, and the polishing powder can improve the grinding and polishing efficiency and save the grinding and polishing time;
s6: and (2) carrying out aging treatment on the wire material obtained in the step (S5) under the protection of 99.6% argon atmosphere, wherein the temperature range of the aging treatment is 450 ℃, straightening the obtained wire material, cutting the straightened wire material into 3m size to obtain a finished wire material, and packaging the finished wire material, wherein the packaging process comprises passivation, rinsing, drying, film wrapping and boxing of the finished wire material, the passivation is favorable for preventing oxidation of the metal surface, and the quality of the wire material is ensured, and the passivation process adopts copper alloy passivation solution DH680, so that the passivation solution has a good use effect.
Example 3
A preparation method of CuFeP alloy wire for shielding is characterized by comprising the following steps:
s1: vacuum smelting: need to inspect the electrical power generating system of vacuum melting furnace, guarantee that condenser cooling water temperature is normal, transformer oil temperature is normal, the cooling water of cable is normal, inspect vacuum system, guarantee that vacuum pump oil level is normal, the filter screen switching is normal, isolation valve seals normally, inspection electrical power generating system and vacuum system can prevent when heating that the machine from damaging and operating personnel's accident takes place, improve the stability of producing the performance simultaneously, prepare high-purity CuFe, CuSn intermediate alloy through vacuum melting equipment, do intermediate alloy and high-purity electrolysis copper according to weight percent again: cu-0.45 wt.% Fe-0.5 wt.% P-0.1 wt.% Sn, smelting, wherein the impurity content in the intermediate alloy and the high-purity electrolytic copper plate is limited to 0.005 wt.% according to the mass percentage, controlling the quality of the raw materials can effectively improve the qualification rate in the subsequent steps, after 0.015 wt.% Ce is added in the standing process of the solution, vacuum smelting is carried out by adopting a roots pump, the vacuum degree in the furnace is 4pa, the gas leakage degree in the furnace is 1pa/min, the vacuum degree in the furnace is stable, on the premise of improving the smelting efficiency, the oxygen content in the furnace is reduced, the stable performance of the product is ensured, the gas extraction rate of the pumps is 3L/s, the ultimate vacuum degree is 0.05pa, the pumping efficiency of the roots pump is high, the vacuum degree in the furnace required by metal heating can be maintained, then electromagnetic stirring is carried out for 30min, in the vacuum smelting, the metal liquid needs to be deoxidized after the metal is melted, reducing oxides in the hydrogen deoxidation type molten metal, pumping the generated compounds out of a vacuum furnace through a vacuum pump, reducing the oxygen content in the molten metal, then casting into a metal ingot with the diameter of 215mm and the length of 2m, inspecting the surface of the metal ingot, and then carrying out S2 on the qualified metal ingot, wherein the surface of a metal ingot bar has no obvious looseness or shrinkage cavity, and the unqualified metal ingot is picked out in time, so that useless work in production is reduced, and the production efficiency is improved;
s2: forging and hot rolling: keeping the temperature of the metal ingot obtained in the step S1 at 850 ℃ for 0.5-1h, rolling the metal ingot to 150mm, turning the surface of a copper alloy bar by a lathe for 1.5mm, then carrying out cold rotary forging on the copper alloy bar to 125mm, then machining the copper alloy bar to the length of 205mm by a turning saw to obtain a CuFeP alloy bar, checking the CuFeP alloy bar, and carrying out the step S3 on the qualified CuFeP alloy bar;
s3: extruding: heating the CuFeP alloy bar obtained in the S2 to 850 ℃, keeping the temperature for 0.8h, conveying the CuFeP alloy bar into an extrusion cylinder through a material conveying belt, carrying out large-reducing forward hot extrusion deformation on the CuFeP alloy bar, reducing the diameter to 20mm, checking the surface defect of the CuFeP alloy bar, cutting off the head and the tail of the CuFeP alloy bar without the surface defect of the bar, and obtaining the reduced CuFeP alloy bar, wherein the CuFeP alloy bar has the qualification standards of no crack on the surface of the bar, oxidized inclusion and peeling, the quality and the performance of a finished product are seriously influenced by the characteristics, and the production resources in production can be effectively saved;
s4: straightening and coiling: continuously reducing and cold-drawing the reduced CuFeP alloy bar obtained in the step S3 by using a 4-ton hydraulic automatic drawing machine for deformation, firstly drawing for 5 times, wherein the diameter reducing range of each drawing is 2mm until the diameter of the reduced CuFeP alloy bar reaches 10mm, and then carrying out intermediate annealing treatment by using a common solution box type furnace, wherein the annealing temperature range is 850 ℃, and the heat preservation time is 2 hours; taking out the reduced CuFeP alloy bar stock for polishing, then drawing the polished reduced CuFeP alloy bar stock for 6 times, wherein the diameter reducing range of each drawing is 1mm until the diameter of the reduced CuFeP alloy bar stock reaches 5mm, then carrying out intermediate annealing treatment on the obtained reduced CuFeP alloy bar stock by adopting a solid solution box type furnace, wherein the annealing temperature range is 800 ℃, and the heat preservation time is 40 min; carrying out 20-pass drawing after polishing again, carrying out drawing until the diameter is 1.5mm, carrying out intermediate annealing under the protection of 99.98% argon atmosphere, carrying out heat preservation for 1.5h at the annealing temperature of 450 ℃ to obtain a wire initial product, polishing by using an LD-20-1700 polishing and polishing robot produced by Dongguan electric intelligent technology company, automatically polishing by using a mechanical arm, establishing a production line, improving the production efficiency to a great extent and saving the cost;
s5: grinding and polishing: grinding and polishing the surface of the wire primary product obtained in the step S4 by using scouring cloth, drawing the ground wire primary product by 4-7 times, wherein the drawing diameter-changing range of each drawing is 0.180mm, and finally drawing and coiling the wire primary product into a wire with the diameter of 2mm, wherein the drawing process adopts JH4304 copper alloy wire drawing liquid produced by Xian Jia Hongyani Limited company, the drawing liquid can reduce the resistance generated in the drawing process, the grinding and polishing are carried out by using the scouring cloth in a tank containing polishing powder, the polishing powder adopts aluminum oxide, and the grinding and polishing efficiency can be improved by adding the polishing powder, so that the grinding and polishing time is saved;
s6: and (2) carrying out aging treatment on the wire material obtained in the step (S5) under the protection of 99.98% argon atmosphere, wherein the temperature range of the aging treatment is 400 ℃, straightening the obtained wire material, cutting the straightened wire material into 3m size to obtain a finished wire material, and packaging the finished wire material, wherein the packaging process comprises passivation, rinsing, drying, film wrapping and boxing of the finished wire material, the passivation is favorable for preventing oxidation of the metal surface, and the quality of the wire material is ensured, and the passivation process adopts copper alloy passivation solution DH680, so that the passivation solution has a good use effect.
The properties of the products produced in the above three examples are compared:
| examples | Thermal conductivity w/mk | Electrical conductivity of | Shielding frequency band (Hz) | Electromagnetic wave absorption (dB) |
| Example 1 | 510 | 54.02485 | 700MHz～4GHz | 80 |
| Example 2 | 520 | 55.045 | 710MHz～4.1GHz | 82 |
| Example 3 | 519 | 55.182 | 750MHz～4.2GHz | 81 |
Claims (7)
1. A preparation method of CuFeP alloy wire for shielding is characterized by comprising the following steps:
s1: vacuum smelting: preparing high-purity CuFe and CuSn intermediate alloy by using vacuum smelting equipment, and then mixing the intermediate alloy and a high-purity electrolytic copper plate according to the weight percentage: cu-0.05-0.5 wt.% Fe-0.015-0.8 wt.% P-0.05-0.15 wt.% Sn, smelting, adding 0.01-0.02 wt.% Ce in the standing process of the solution, then carrying out electromagnetic stirring for 30min, then casting into a metal ingot with the diameter of 210-230mm and the length of 1.5-3m, inspecting the surface of the metal ingot, and carrying out S2 on the qualified metal ingot;
s2: forging and hot rolling: keeping the temperature of the metal ingot obtained in the S1 at 900 ℃ for 0.5-1h at 800-;
s3: extruding: heating the CuFeP alloy bar obtained in S2 to 800-950 ℃, preserving heat for 0.5-1h, conveying the CuFeP alloy bar into an extrusion cylinder through a material conveying belt, carrying out large-diameter-changing forward hot extrusion deformation on the CuFeP alloy bar, reducing the diameter to 15-30mm, checking the surface defect of the CuFeP alloy bar, cutting off the head and the tail of the CuFeP alloy bar without the surface defect of the bar, and obtaining the reduced-diameter CuFeP alloy bar;
s4: straightening and coiling: continuously reducing the diameter of the reduced CuFeP alloy bar obtained in S3 by using a 3-5-ton hydraulic automatic drawing machine for cold drawing deformation, firstly drawing for 4-7 times, wherein the diameter reducing range of each drawing is 1-3mm until the diameter of the reduced CuFeP alloy bar reaches 9-12mm, then carrying out intermediate annealing treatment by using a common solution box type furnace, wherein the annealing temperature range is 800-; taking out the reduced CuFeP alloy bar stock for polishing, then drawing the polished reduced CuFeP alloy bar stock for 4-7 times, wherein the diameter reducing range of each drawing is 0.5-2mm until the diameter of the reduced CuFeP alloy bar stock reaches 4-7mm, then carrying out intermediate annealing treatment on the obtained reduced CuFeP alloy bar stock by adopting a solid solution box type furnace, wherein the annealing temperature range is 750 plus materials and 850 ℃, and the heat preservation time is 30-60 min; polishing again, drawing for 18-25 times until the diameter is 1-3mm, and then performing intermediate annealing under the protection of argon atmosphere at the annealing temperature of 400-500 ℃ for 1-2h to obtain a wire initial product;
s5: grinding and polishing: grinding and polishing the surface of the primary wire product obtained in the step S4 by using scouring cloth, drawing the primary wire product subjected to grinding and polishing for 4-7 times, wherein the diameter reducing range of each drawing is 0.125-0.214mm, and finally, coiling the primary wire product subjected to grinding and polishing into a wire with the diameter of 0.5-1.5 mm;
s6: and (3) carrying out aging treatment on the wire material obtained in the step (S5) under the protection of argon atmosphere, wherein the temperature range of the aging treatment is 350-450 ℃, straightening the obtained wire material, cutting the straightened wire material into fixed-size wires to obtain a finished wire material, and packaging the finished wire material.
2. The method for preparing CuFeP alloy wire for shielding as claimed in claim 1, wherein the polishing in S5 is performed by polishing with scouring pad in a tank containing polishing powder, and the polishing powder is alumina.
3. The method for preparing CuFeP alloy wire for shielding as claimed in claim 1, wherein the vacuum melting in S1 is performed by a roots pump, the vacuum degree in the furnace is in the range of 0-5Pa, and the degree of gas leakage in the furnace is 1 Pa/min.
4. The method for preparing a CuFeP alloy wire for shielding as claimed in claim 3, wherein said roots pump has a pumping rate of 3L/s and an ultimate vacuum of 0.05 Pa.
5. The method for preparing CuFeP alloy wire for shielding as claimed in claim 1, wherein before said step S1, a power supply system of a vacuum melting furnace is inspected to ensure that the temperature of cooling water in a capacitor is normal, the temperature of transformer oil is normal, the temperature of cooling water in a cable is normal, and the vacuum system is inspected to ensure that the oil level of oil in a vacuum pump is normal, the filter screen is switched to be normal, and the seal of an isolation valve is normal.
6. The method for preparing CuFeP alloy wire for shielding as claimed in claim 1, wherein before said step S1, the power system of the vacuum melting furnace needs to be inspected, the vacuum system needs to be inspected, and it is ensured that the oil level and the filter screen of the vacuum pump are switched normally and the seal of the isolation valve is normal.
7. The method for producing CuFeP alloy wire for shielding as claimed in claim 1, wherein in said vacuum melting at S1, a deoxidation treatment of molten metal is required after the melting of the metal, said deoxidation being by hydrogen deoxidation.
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