A method for preparing a corrosion-resistant copper-nickel alloy wire

Abstract

This invention provides a method for preparing corrosion-resistant copper-nickel alloy wire, relating to the field of copper-nickel alloy wire preparation. The method includes: S1, placing copper and nickel in a vacuum furnace, setting the preheating temperature to 300℃-400℃ for 1-2 hours, removing the material after preheating, and preparing for the next step; S2, placing the pretreated copper and nickel in an electroslag remelting furnace, setting the current to 1000A-2000A and the voltage to 30V-40V, and preparing for protective gas melting after electroslag remelting. Before melting, the induction furnace is protected by a mixture of argon and nitrogen. The argon-nitrogen mixed gas supply is activated to pre-purge the furnace and remove air. Compared to argon, nitrogen pre-purging is less costly, and the argon-nitrogen purging ensures effective removal, solving the problems of oxygen and other impurities entering the alloy, reducing its properties and corrosion resistance, and causing uneven alloy composition.

Description

Technical Field

[0001] This invention relates to the field of copper-nickel alloy wire preparation technology, specifically a method for preparing corrosion-resistant copper-nickel alloy wire. Background Technology

[0002] Copper-nickel alloy welding wire is mainly composed of copper, with added nickel and silicon, etc. It features high strength and high toughness, and can be used to weld heat-resistant steel and stainless steel products, exhibiting excellent welding performance. The melting point of copper-nickel alloy welding wire is 1120°C~1166°C, and its brazing temperature is 1180°C~1220°C, giving it a high melting point and brazing temperature. Corrosion-resistant copper-nickel alloy wire is a special alloy material composed of copper, nickel, and other alloying elements. It has excellent corrosion resistance and electrical conductivity, and is commonly used in corrosive environments in electronics, chemical, and marine industries. Corrosion-resistant copper-nickel alloy wire has good corrosion resistance, resisting erosion from acidic, alkaline, and salt solutions. It performs well in humid and corrosive environments, providing a long service life. Copper-nickel alloy wire has good electrical conductivity, making it a high-quality conductive material. Its low resistivity allows for efficient current conduction and exhibits low signal loss in high-frequency circuits. Corrosion-resistant copper-nickel alloy wire has high strength and toughness, capable of withstanding certain tensile and bending stresses. It possesses good plasticity and machinability, allowing for processes such as wire drawing, welding, and forming. Copper-nickel alloy wire exhibits good stability at high temperatures, maintaining excellent mechanical properties and corrosion resistance. This makes it highly valuable in applications requiring resistance to high-temperature corrosive environments.

[0003] However, during smelting and continuous casting, oxygen and other impurities can enter the alloy. This reduces the alloy's properties and corrosion resistance, and if the elements are not fully mixed during smelting, it can lead to uneven alloy composition. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a method for preparing corrosion-resistant copper-nickel alloy wire, which solves the problems of oxygen and other impurities entering the alloy, reducing its properties and corrosion resistance, and uneven alloy composition.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing a corrosion-resistant copper-nickel alloy wire, comprising:

[0008] S1. Place copper and nickel into a vacuum furnace, set the preheating temperature to 300℃-400℃, and the duration to 1-2 hours. After the materials are preheated, remove them and prepare for the next step.

[0009] S2. Place the pretreated copper and nickel into the electroslag remelting furnace, set the current to 1000A-2000A and the voltage to 30V-40V. After the electroslag remelting is completed, prepare for protective gas smelting.

[0010] S3. Place the electroslag remelted alloy into an induction furnace for smelting. After smelting, proceed to the continuous casting stage.

[0011] S4. Turn on the protective gas to ensure that no oxygen is introduced during the casting process. Set the casting speed to 100mm / min-300mm / min. After casting is completed, proceed to the rolling and annealing stage.

[0012] S5. Roll the cast billet, setting the rolling reduction rate to 10%-20%. After rolling several times, send the wire into the annealing furnace. After annealing, continue rolling to the final size.

[0013] S6. Use a 5%-10% dilute sulfuric acid solution to pickle the wire for 10-20 minutes. After pickling, use polishing equipment to polish until the surface reaches the smoothness standard.

[0014] S7. Use a spectrometer to detect the alloy composition, and use a hardness tester and tensile tester to test the hardness and mechanical properties of the alloy.

[0015] Preferably, the specific steps of the protective gas smelting in S2 are as follows:

[0016] A. Select argon and nitrogen as protective gases, clean the furnace to ensure there are no impurities or residues inside, and heat the furnace to near the melting temperature to shorten the actual melting time;

[0017] B. Ensure the furnace body is sealed to prevent external gas from entering. Begin injecting protective gas to replace the air inside the furnace, and then inject nitrogen and argon in sequence to ensure the furnace is filled with pure protective gas.

[0018] C. Place the pretreated alloy into the furnace and heat the material to its melting point. Throughout the smelting process, ensure a stable flow of protective gas and maintain the gas environment inside the furnace.

[0019] D. Under the protection of a protective gas, pour the molten metal or alloy into a pre-prepared mold and wait for the alloy to solidify and cool in the mold;

[0020] E. Once pouring is complete and the material begins to cool, stop the supply of protective gas and shut down the furnace.

[0021] Preferably, the annealing temperature is 600℃-700℃ and the time is 1-2 hours.

[0022] Preferably, the pouring temperature is 1100℃-1200℃.

[0023] Preferably, the melting temperature is 1150℃-1250℃ and is maintained for 2-3 hours.

[0024] A preparation apparatus for corrosion-resistant copper-nickel alloy wire, used in accordance with the preparation method of corrosion-resistant copper-nickel alloy welding wire according to any one of claims 1 to 5, the preparation apparatus comprising: a vacuum furnace, a deoxidation device, an electroslag remelting furnace, an argon and nitrogen mixed protective induction furnace, a continuous casting machine, a protective gas supply device, a rolling mill, and an annealing furnace.

[0025] Preferably, the mixing ratio of argon and nitrogen to protect the induction furnace is 3 parts argon to 2 parts nitrogen.

[0026] (III) Beneficial Effects

[0027] This invention provides a method for preparing corrosion-resistant copper-nickel alloy wire. It has the following beneficial effects:

[0028] Before melting, the induction furnace is protected by a mixture of argon and nitrogen. The argon-nitrogen gas supply is started to pre-purge the furnace and remove air. Compared with argon, nitrogen is less costly for pre-removing air. The removal of nitrogen by argon ensures the removal effect at the same time, which solves the problems of oxygen and other impurities entering the alloy, reducing the alloy's properties and corrosion resistance, and causing uneven alloy composition. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention have been clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1:

[0031] This invention provides a method for preparing corrosion-resistant copper-nickel alloy wire, comprising: S1, placing copper and nickel in a vacuum furnace, setting the preheating temperature to 300°C to effectively reduce the formation of inclusions during the melting process and improve the internal quality of the alloy, for a duration of 1-2 hours, and removing the material after preheating to prepare for the next step.

[0032] S2. Place the pretreated copper and nickel into an electroslag remelting furnace, set the current to 1000A and the voltage to 30V. After electroslag remelting, prepare for protective gas melting. The specific steps for protective gas melting are as follows: A. Select argon and nitrogen as protective gases, clean the furnace to ensure there are no impurities or residues inside, heat the furnace to near the melting temperature, and shorten the actual melting time. B. Ensure the furnace body is sealed to prevent external gases from entering, start injecting protective gas to replace the air inside the furnace, and then inject nitrogen and argon in sequence to ensure the furnace is filled with pure protective gas. C. Place the pretreated alloy into the furnace and heat the material to its melting point. Throughout the melting process, ensure a stable flow of protective gas to maintain the gas environment inside the furnace. D. Under the maintenance of protective gas, pour the molten metal or alloy into a pre-prepared mold and wait for the alloy to solidify and cool in the mold. E. After pouring is completed and the material begins to cool, stop the supply of protective gas and shut down the furnace.

[0033] S3. Place the electroslag remelted alloy into an induction furnace for smelting. After smelting, proceed to the continuous casting stage. The smelting temperature is 1150℃ and the process lasts for 2 hours.

[0034] S4. Turn on the protective gas to ensure that no oxygen is introduced during the casting process. Set the casting speed to 100 mm / min. After casting is completed, proceed to the rolling and annealing stage. The casting temperature is 1100℃.

[0035] S5. Roll the cast billet, setting the rolling reduction rate to 10%. After rolling several times, send the wire into an annealing furnace. After annealing, continue rolling to the final size. The annealing temperature is 600℃ and the time is 1 hour. Directional solidification can optimize the grain structure of the alloy, thereby improving its mechanical properties and corrosion resistance. Directional solidification is a solidification technology for metals and alloys, which aims to produce crystal growth in a specific direction. Through this method, the grain structure can be optimized, thereby improving the mechanical properties and corrosion resistance of the alloy.

[0036] S6. Pickle the wire with a 5%-10% dilute sulfuric acid solution for 10 minutes. After pickling, polish with polishing equipment until the surface reaches the smoothness standard. Polishing is an important post-processing step used to improve the surface quality of metals and other materials. Use medium-grit abrasives for initial polishing to remove any minor scratches or surface irregularities after pickling. Use finer abrasives for further polishing to further improve the surface smoothness. Use ultrafine abrasives or cloth wheels with appropriate polishing paste to achieve a high mirror finish. After polishing, use a surface roughness meter to measure to confirm that the surface has reached the predetermined smoothness standard.

[0037] S7. Use a spectrometer to detect the alloy composition, and use a hardness tester and tensile tester to test the hardness and mechanical properties of the alloy.

[0038] A preparation apparatus for corrosion-resistant copper-nickel alloy wire, used for preparing corrosion-resistant copper-nickel alloy welding wire according to any one of claims 1 to 5, the preparation apparatus comprising: a vacuum furnace, a deoxidation device, an electroslag remelting furnace, an argon and nitrogen mixed protective induction furnace, a continuous casting machine, a protective gas supply device, a rolling mill, and an annealing furnace, wherein the mixing ratio of argon and nitrogen mixed protective induction furnace is 3 parts argon to 2 parts nitrogen.

[0039] Example 2:

[0040] This invention provides a method for preparing corrosion-resistant copper-nickel alloy wire, comprising: S1, placing copper and nickel in a vacuum furnace, setting the preheating temperature to 400°C to effectively reduce the formation of inclusions during the melting process and improve the internal quality of the alloy, for a duration of 2 hours, and removing the material after preheating to prepare for the next step.

[0041] S2. Place the pretreated copper and nickel into an electroslag remelting furnace, set the current to 2000A and the voltage to 40V. After electroslag remelting, prepare for protective gas melting. The specific steps for protective gas melting are as follows: A. Select argon and nitrogen as protective gases, clean the furnace to ensure there are no impurities or residues inside, heat the furnace to near the melting temperature, and shorten the actual melting time. B. Ensure the furnace body is sealed to prevent external gases from entering, start injecting protective gas to replace the air inside the furnace, and then inject nitrogen and argon in sequence to ensure the furnace is filled with pure protective gas. C. Place the pretreated alloy into the furnace and heat the material to its melting point. Throughout the melting process, ensure a stable flow of protective gas to maintain the gas environment inside the furnace. D. Under the maintenance of protective gas, pour the molten metal or alloy into a pre-prepared mold and wait for the alloy to solidify and cool in the mold. E. After pouring is completed and the material begins to cool, stop the supply of protective gas and shut down the furnace.

[0042] S3. Place the electroslag remelted alloy into an induction furnace for smelting. After smelting, proceed to the continuous casting stage. The smelting temperature is 1250℃ and the process lasts for 3 hours.

[0043] S4. Turn on the protective gas to ensure that no oxygen is introduced during the casting process. Set the casting speed to 300 mm / min. After casting is completed, proceed to the rolling and annealing stage. The casting temperature is 1200℃.

[0044] S5. Roll the cast billet, setting the rolling reduction rate to 20%. After rolling several times, send the wire into an annealing furnace. After annealing, continue rolling to the final size. The annealing temperature is 700℃ and the time is 2 hours. Directional solidification can optimize the grain structure of the alloy, thereby improving its mechanical properties and corrosion resistance. Directional solidification is a solidification technology for metals and alloys, which aims to produce crystal growth in a specific direction. Through this method, the grain structure can be optimized, thereby improving the mechanical properties and corrosion resistance of the alloy.

[0045] S6. Pickle the wire with a 10% dilute sulfuric acid solution for 20 minutes. After pickling, polish it with polishing equipment until the surface reaches the smoothness standard. Polishing is an important post-processing step used to improve the surface quality of metals and other materials. Use medium-grit abrasives for initial polishing to remove any minor scratches or surface irregularities after pickling. Use finer abrasives for further polishing to further improve the surface smoothness. Use ultrafine abrasives or cloth wheels with appropriate polishing paste to achieve a high mirror gloss. After polishing, use a surface roughness meter to measure to confirm that the surface has reached the predetermined smoothness standard.

[0046] S7. Use a spectrometer to detect the alloy composition, and use a hardness tester and tensile tester to test the hardness and mechanical properties of the alloy.

[0047] A preparation apparatus for corrosion-resistant copper-nickel alloy wire, used for preparing corrosion-resistant copper-nickel alloy welding wire according to any one of claims 1 to 5, the preparation apparatus comprising: a vacuum furnace, a deoxidation device, an electroslag remelting furnace, an argon and nitrogen mixed protective induction furnace, a continuous casting machine, a protective gas supply device, a rolling mill, and an annealing furnace, wherein the mixing ratio of argon and nitrogen mixed protective induction furnace is 3 parts argon to 2 parts nitrogen.

[0048] Example 3:

[0049] This invention provides a method for preparing corrosion-resistant copper-nickel alloy wire, comprising: S1, placing copper and nickel in a vacuum furnace, setting the preheating temperature to 350°C to effectively reduce the formation of inclusions during the melting process and improve the internal quality of the alloy, for a duration of 1.5 hours, and removing the material after preheating to prepare for the next step.

[0050] S2. Place the pretreated copper and nickel into an electroslag remelting furnace, set the current to 1500A and the voltage to 35V. After electroslag remelting, prepare for protective gas melting. The specific steps for protective gas melting are as follows: A. Select argon and nitrogen as protective gases, clean the furnace to ensure there are no impurities or residues inside, heat the furnace to near the melting temperature, and shorten the actual melting time. B. Ensure the furnace body is sealed to prevent external gases from entering, start injecting protective gas to replace the air inside the furnace, and then inject nitrogen and argon in sequence to ensure the furnace is filled with pure protective gas. C. Place the pretreated alloy into the furnace and heat the material to its melting point. Throughout the melting process, ensure a stable flow of protective gas to maintain the gas environment inside the furnace. D. Under the maintenance of protective gas, pour the molten metal or alloy into a pre-prepared mold and wait for the alloy to solidify and cool in the mold. E. After pouring is completed and the material begins to cool, stop the supply of protective gas and shut down the furnace.

[0051] S3. Place the electroslag remelted alloy into an induction furnace for smelting. After smelting, proceed to the continuous casting stage. The smelting temperature is 1200℃ and the process lasts for 2.5 hours.

[0052] S4. Turn on the protective gas to ensure that no oxygen is introduced during the casting process. Set the casting speed to 200 mm / min. After casting is completed, proceed to the rolling and annealing stage. The casting temperature is 1150℃.

[0053] S5. Roll the cast billet, setting the rolling reduction rate to 15%. After rolling several times, send the wire into an annealing furnace. After annealing, continue rolling to the final size. The annealing temperature is 650℃ and the time is 1.5 hours. Directional solidification can optimize the grain structure of the alloy, thereby improving its mechanical properties and corrosion resistance. Directional solidification is a solidification technology for metals and alloys, which aims to produce crystal growth in a specific direction. Through this method, the grain structure can be optimized, thereby improving the mechanical properties and corrosion resistance of the alloy.

[0054] S6. Pickle the wire with a 7.5% dilute sulfuric acid solution for 15 minutes. After pickling, polish with polishing equipment until the surface reaches the smoothness standard. Polishing is an important post-processing step used to improve the surface quality of metals and other materials. Use medium-grit abrasive for initial polishing to remove any minor scratches or surface irregularities after pickling. Use finer abrasive for further polishing to further improve the surface smoothness. Use ultrafine abrasive or cloth wheels with appropriate polishing paste to achieve a high mirror gloss. After polishing, use a surface roughness meter to measure to confirm that the surface has reached the predetermined smoothness standard.

[0055] S7. Use a spectrometer to detect the alloy composition, and use a hardness tester and tensile tester to test the hardness and mechanical properties of the alloy.

[0056] A preparation apparatus for corrosion-resistant copper-nickel alloy wire, used for preparing corrosion-resistant copper-nickel alloy welding wire according to any one of claims 1 to 5, the preparation apparatus comprising: a vacuum furnace, a deoxidation device, an electroslag remelting furnace, an argon and nitrogen mixed protective induction furnace, a continuous casting machine, a protective gas supply device, a rolling mill, and an annealing furnace, wherein the mixing ratio of argon and nitrogen mixed protective induction furnace is 3 parts argon to 2 parts nitrogen.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a corrosion-resistant copper-nickel alloy wire, characterized in that, include: S1. Place copper and nickel into a vacuum furnace, set the preheating temperature to 300℃-400℃, and the duration to 1-2 hours. After the materials are preheated, remove them and prepare for the next step. S2. Place the pretreated copper and nickel into the electroslag remelting furnace, set the current to 1000A-2000A and the voltage to 30V-40V. After the electroslag remelting is completed, prepare for protective gas smelting. S3. Place the electroslag remelted alloy into an induction furnace for smelting. After smelting, proceed to the continuous casting stage. S4. Turn on the protective gas to ensure that no oxygen is introduced during the casting process. Set the casting speed to 100mm / min-300mm / min. After casting is completed, proceed to the rolling and annealing stage. S5. Roll the cast billet, setting the rolling reduction rate to 10%-20%. After rolling several times, send the wire into the annealing furnace. After annealing, continue rolling to the final size. S6. Use a 5%-10% dilute sulfuric acid solution to pickle the wire for 10-20 minutes. After pickling, use polishing equipment to polish until the surface reaches the smoothness standard. S7. Use a spectrometer to detect the alloy composition, and use a hardness tester and tensile tester to test the hardness and mechanical properties of the alloy. The specific steps for the protective gas smelting described in S2 are as follows: A. Select argon and nitrogen as protective gases, clean the furnace to ensure there are no impurities or residues inside, and heat the furnace to near the melting temperature to shorten the actual melting time; B. Ensure the furnace body is sealed to prevent external gas from entering. Begin injecting protective gas to replace the air inside the furnace, and then inject nitrogen and argon in sequence to ensure the furnace is filled with pure protective gas. C. Place the pretreated alloy into the furnace and heat the material to its melting point. Throughout the smelting process, ensure a stable flow of protective gas and maintain the gas environment inside the furnace. D. Under the protection of a protective gas, pour the molten metal or alloy into a pre-prepared mold and wait for the alloy to solidify and cool in the mold; E. Once pouring is complete and the material begins to cool, stop the supply of protective gas and shut down the furnace; The mixing ratio of argon and nitrogen to protect the induction furnace is 3 parts argon to 2 parts nitrogen.

2. The method for preparing a corrosion-resistant copper-nickel alloy wire according to claim 1, characterized in that: The annealing temperature is 600℃-700℃, and the time is 1-2 hours.

3. The method for preparing a corrosion-resistant copper-nickel alloy wire according to claim 1, characterized in that: The pouring temperature is 1100℃-1200℃.

4. The method for preparing a corrosion-resistant copper-nickel alloy wire according to claim 1, characterized in that: The melting temperature is 1150℃-1250℃ and lasts for 2-3 hours.