Corrosion-resistant cathode roller titanium cylinder and manufacturing method thereof

Abstract

The invention relates to a corrosion-resistant cathode roller titanium cylinder which comprises the following material components in percentage by weight: 0.1-0.3% of Mo, less than 0.06% of Fe, less than 0.02% of C, less than 0.02% of N, less than 0.01% of H, less than 0.06% of O, less than 0.2% of other impurity elements and the balance of titanium. The manufacturing method comprises the following steps: firstly, selecting sponge titanium and molybdenum particles, and smelting by using a vacuum consumable electric arc furnace to obtain a titanium ingot; then the titanium ingot is subjected to homogenizing annealing, multi-directional forging and cerclage forming to the required size; then the spinning blank is placed in an electric furnace to be hotly arranged on a core mold of a spinning machine, secondary spinning machining is conducted on the spinning blank till spinning forming of the cathode roller titanium cylinder is completed, and a pre-formed cathode roller titanium cylinder is obtained; and finally, carrying out annealing treatment on the primarily-formed cathode roller titanium cylinder, cutting the primarily-formed cathode roller titanium cylinder to a required size, mechanically removing surface oxide skin and defects, and polishing the primarily-formed cathode roller titanium cylinder until the surface is smooth and free of defects to obtain the corrosion-resistant cathode roller titanium cylinder. The titanium cylinder manufactured by the method has the advantages of uniform and fine crystal grains and corrosion resistance, and the production efficiency of the crude foil engine is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cathode roller titanium cylinders, and in particular to a corrosion-resistant cathode roller titanium cylinder and a manufacturing method thereof. Background Art

[0002] The patent application "A method for manufacturing a seamless titanium cylinder for cathode rollers" (publication number CN102489942A) discloses the use of pure titanium ingots, which are expanded and stretched, and then 3-4 times of spinning and then annealed and heat treated to finally obtain the formed cathode roller titanium cylinder; however, the obtained titanium cylinder has relatively coarse grains, which will affect the quality of copper foil in actual production. The patent application "A method for preparing fine-grained titanium cylinder for cathode rollers" (publication number CN110976603A) discloses the use of staggered spinning to reduce the amount of single-wheel pressure reduction, while optimizing the blank structure, increasing the deformation stability during spinning, and realizing room temperature spinning of TA1 titanium alloy. The final titanium cylinder has a fine and uniform microstructure, and the grain size can reach above level 9; however, the material used in this invention is pure titanium material, and its corrosion resistance during use needs to be improved.

[0003] In summary, the existing cathode roller titanium cylinders are all made of high-purity TA1 pure titanium. The cathode rollers made of industrial pure titanium have certain corrosion resistance due to the characteristics of pure titanium. However, since they are immersed in copper sulfate solution for a long time during use, an oxide film is generated on the surface of the cathode roller, which in turn affects the quality of the generated copper foil. That is, the existing technology has the disadvantages that the titanium cylinder of the pure titanium cathode roller has relatively coarse grains and poor corrosion resistance. Therefore, the cathode roller needs to be hoisted out for offline grinding after being used for a period of time, which seriously affects the production efficiency of the foil machine. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a corrosion-resistant cathode roller titanium cylinder and a method for manufacturing the same. By adding trace Mo elements to sponge titanium, multi-directional forging of the titanium ingot is performed, and strong spinning combined with annealing treatment is adopted. The manufactured titanium cylinder has the advantages of uniform and fine grains and corrosion resistance, thereby improving the production efficiency of the foil machine.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A corrosion-resistant cathode roller titanium cylinder, whose material components are as follows by weight percentage: Mo: 0.1-0.3%, Fe < 0.06%, C < 0.02%, N < 0.02%, H < 0.01%, O < 0.06%, the total content of other impurity elements < 0.2%, and the rest is titanium; the content of each of other impurity elements is < 0.06%.

[0007] A method for manufacturing a corrosion-resistant cathode roller titanium cylinder comprises the following steps:

[0008] Step 1: Use a vacuum consumable arc furnace to smelt titanium sponge and molybdenum particles. The weight percentage of the titanium ingot obtained after smelting is as follows: Mo: 0.1-0.3%, Fe < 0.06%, C < 0.02%, N < 0.02%, H < 0.01%, O < 0.06%, the total content of other impurity elements < 0.2%, and the rest is titanium; the single content of other impurity elements is < 0.06%;

[0009] Step 2: homogenizing annealing the titanium ingot smelted in step 1 at 1100-1300°C for 2-4 hours;

[0010] Step 3: multi-directional forging the titanium ingot annealed in step 2, first keep the titanium ingot at 1050-1200°C for 4-8h, and then perform multiple roughing-drawing forging, the pressing speed is 200-400mm / min, the roughing reduction is 60-70% in each pass, the drawing reduction is 50-60%, the multi-directional forging is not less than 3 passes, and each pass requires more than three roughing and more than three drawing forgings; after the multi-directional forging is completed, the titanium ingot is punched, and the hole diameter is 300-320mm; after forging and punching, the outer surface temperature of the titanium ingot is not lower than 600°C; the titanium ingot after punching is naturally cooled to room temperature, and its surface is polished to remove cracks and scratches on the inner and outer surfaces;

[0011] Step 4: After the ingot processed in step 3 is kept at 600-750°C for 3-5 hours, it is formed into a desired size by ring tying, cooled naturally to room temperature, and the oxide layer on the surface of the titanium ring is removed by machining;

[0012] Step 5: Place the spun blank after removing the oxide layer in step 4 in an electric furnace and heat it to 650-680°C. After keeping warm for 2-3 hours, hot-install it on the core mold of the spinning machine; perform the first spinning process on the spun blank; after completing the first spinning process, the spinning wheel withdraws and returns to the initial spinning position, and the second spinning process begins. After completing the second spinning process, the spinning wheel withdraws and returns to the initial spinning position; repeat the second spinning process until the spinning forming of the cathode roller titanium cylinder is completed; withdraw the spinning wheel, unload the spun titanium cylinder from the spinning machine, and obtain the initially formed cathode roller titanium cylinder; during the spinning process, keep the temperature of the spun titanium cylinder at 550-650°C; the thinning amount of each pass is 5-7mm;

[0013] Step 6: Annealing the initially formed cathode roller titanium cylinder obtained by spinning in step 5, raising the furnace temperature to 580-630°C, opening the furnace cover, placing the initially formed cathode roller titanium cylinder, and closing the furnace cover; keeping the temperature at 580-630°C for 6-8h, then opening the furnace cover, and air cooling to room temperature;

[0014] Step 7: Cut the cathode roller titanium cylinder annealed in step 6 to the required size, remove the surface oxide scale and defects by machining, and polish until the surface is smooth and defect-free to obtain a corrosion-resistant cathode roller titanium cylinder.

[0015] A corrosion-resistant cathode roller titanium cylinder is prepared by the method.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention can improve the corrosion resistance of the cathode roller by adding a trace amount of Mo element to the titanium sponge, thereby improving the working efficiency and service life of the cathode roller.

[0018] The present invention performs homogenization annealing on the titanium ingot obtained by smelting, and keeps the temperature at 1100-1300° C. for 2-4 hours. Annealing at this temperature can ensure uniform dispersion distribution of alloy elements in the titanium ingot, and prevent defects caused by element segregation in subsequent production.

[0019] The invention conducts multi-directional forging on an annealed titanium ingot, firstly keeps the titanium ingot at 1050-1200 DEG C for 4-8h, then conducts multiple upsetting-drawing forging, the pressing speed is 200-400mm / min, the upsetting pressing amount is 60-70% in each pass, the drawing pressing amount is 50-60%, the multi-directional forging is no less than 3 passes, and each pass requires more than three upsetting and more than three drawing forgings; the purpose is to eliminate the deformation dead zone, so that the microstructure of the blank in all directions is more uniform, the mechanical properties in all directions are uniform, the anisotropy is weaker, and the subsequent deformation is easier to carry out.

[0020] After the multi-directional forging is completed, the titanium ingot is punched, and the hole diameter is 300-320mm. The punching is because the core roller of the ring-binding machine needs to pass through the blank to work during the rolling process. Selecting this size is conducive to adapting to the size of the core roller of the equipment used.

[0021] After forging and punching are completed in the present invention, the outer surface temperature of the titanium ingot is not lower than 600°C. If the temperature of the titanium ingot is too low, the deformation amount under the same pressure will become smaller, thereby failing to eliminate the deformation dead zone and reduce the anisotropy of the titanium ingot. Therefore, controlling the temperature of the titanium ingot at the end of forging can ensure that the titanium ingot is fully deformed, facilitate subsequent processing, and improve the performance of the finished titanium cylinder.

[0022] After punching, the titanium ingot is naturally cooled to room temperature, and its surface is polished to remove cracks and scratches on the inner and outer surfaces, so as to prevent the surface defects from affecting the deformation of the material during the subsequent deformation process, thereby preventing defects from being formed on the surface or inside the material, thereby improving the quality and electrical conductivity of the finished titanium cylinder.

[0023] The present invention keeps the ingot at 600-750°C for 3-5h, performs ring-forming to the required size, cools naturally to room temperature, and removes the oxide layer on the surface of the titanium ring by machining to prevent the surface defects from affecting the deformation of the material during the subsequent deformation process, thereby preventing defects from being formed on the surface or inside the material, thereby improving the quality and conductivity of the finished titanium cylinder.

[0024] The present invention places the spun blank after the oxide layer is removed in an electric furnace and heated to 650-680°C, keeps the temperature for 2-3 hours, and then hot-mounts it on a spinning machine core mold; performs a first spinning process on the spun blank; after completing the first spinning process, the spinning wheel withdraws and returns to the initial spinning position, and the second spinning process begins; after completing the second spinning process, the spinning wheel withdraws and returns to the initial spinning position; repeats the second spinning process until the spinning forming of the cathode roller titanium cylinder is completed; the deformation amount of each pass is moderate, so as to prevent the titanium cylinder from being severely deformed due to excessive deformation and failing to achieve the required dimensional accuracy, thereby improving the quality of the finished titanium cylinder and improving the utilization rate of the raw materials.

[0025] The present invention withdraws the spinning wheel and unloads the spun titanium cylinder from the spinning machine to obtain the initially formed cathode roller titanium cylinder; during the spinning process, the temperature of the spun titanium cylinder is maintained at 550-650°C; the thinning amount of each pass is 5-7mm, so as to prevent the titanium cylinder from being severely deformed due to excessive deformation and unable to achieve the required dimensional accuracy, or from increasing deformation resistance due to too low temperature and unable to meet the required size after forming, thereby improving the quality and mechanical properties of the finished titanium cylinder.

[0026] The present invention performs annealing treatment on the initially formed cathode roller titanium cylinder obtained by spinning, raises the furnace temperature to 580-630°C, opens the furnace cover, puts the initially formed cathode roller titanium cylinder, and closes the furnace cover; after keeping the temperature at 580-630°C for 6-8h, opens the furnace cover, and air cools to room temperature. The titanium cylinder microstructure is regulated by annealing treatment, so as to obtain a titanium cylinder with uniform grain size and fine grains.

[0027] In summary, the present invention performs multi-directional forging on titanium ingots and adopts strong spinning combined with annealing treatment, so the prepared cathode roller titanium cylinder has uniform and fine grains, and the grain size grade can reach above grade 8, thereby improving the production efficiency of the foil machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an electron microscope image of the cathode roller titanium cylinder prepared in Example 1 of the present invention.

[0029] Figure 2 This is an electron microscope image of the cathode roller titanium cylinder prepared in Example 2 of the present invention.

[0030] Figure 3 This is an electron microscope image of the cathode roller titanium cylinder prepared in Example 3 of the present invention.

[0031] Figure 4 This is an electron microscope image of the cathode roller titanium cylinder prepared in Example 4 of the present invention.

[0032] Figure 5 This is an electron microscope image of the cathode roller titanium cylinder prepared in Example 5 of the present invention. DETAILED DESCRIPTION

[0033] The present invention is described in detail below in conjunction with embodiments and drawings.

[0034] Example 1

[0035] A corrosion-resistant cathode roller titanium cylinder, whose material components are as follows by weight percentage: Mo: 0.1%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the content of each of other impurity elements is less than 0.05%.

[0036] A method for manufacturing a corrosion-resistant cathode roller titanium cylinder, preparing a cathode roller titanium cylinder of φ500mm×600mm, comprising the following steps:

[0037] Step 1: Use a vacuum consumable arc furnace to smelt titanium sponge and molybdenum particles. The weight percentage of the titanium ingot obtained after smelting is as follows: Mo: 0.1%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the content of each of other impurity elements is less than 0.05%;

[0038] Step 2: homogenizing annealing the titanium ingot obtained by smelting in step 1 at 1100° C. for 2 hours. Annealing at this temperature can ensure that the alloy elements in the titanium ingot are evenly dispersed and distributed, thereby preventing defects caused by element segregation in subsequent production;

[0039] Step 3: Multi-directional forging is performed on the titanium ingot after annealing in step 2. First, the titanium ingot is kept at 1050℃ for 4h, and then multiple roughening-drawing forging is performed. The pressing speed is 200mm / min, and the roughening reduction in each pass is 60%, and the drawing reduction is 50%. The multi-directional forging is not less than 3 times, and each pass requires three roughening and three drawing forgings. The purpose is to eliminate the deformation dead zone, so that the microstructure of the billet in all directions is more uniform, the mechanical properties in all directions are uniform, and the anisotropy is weak, so that subsequent deformation is easier to carry out; after the multi-directional forging is completed, the titanium ingot is punched with a hole diameter of 300mm. The punching is because the core roller of the ring-binding machine needs to pass through during the rolling process. The size of the blank is selected depending on the size of the core roller of the equipment used; the outer surface temperature of the titanium ingot after forging and punching is not less than 600°C. If the temperature of the titanium ingot is too low, the deformation amount will be smaller under the same pressure, which will fail to eliminate the deformation dead zone and reduce the anisotropy of the titanium ingot. Therefore, controlling the temperature of the titanium ingot at the end of forging can ensure that the titanium ingot is fully deformed and convenient for subsequent processing; the titanium ingot after punching is naturally cooled to room temperature, and its surface is polished to remove cracks and scratches on the inner and outer surfaces to prevent the surface defects from affecting the deformation of the material during the subsequent deformation process due to the presence of surface defects, thereby forming defects on the surface or inside of the material;

[0040] Step 4: After the ingot processed in step 3 is kept at 600°C for 3h, it is ring-formed to φ500mm, cooled naturally to room temperature, and the oxide layer on the surface of the titanium ring is removed by machining to prevent the surface defects from affecting the deformation of the material during the subsequent deformation process, thereby forming defects on the surface or inside the material;

[0041] Step 5: Place the spun blank after the oxide layer is removed in step 4 in an electric furnace and heat it to 650°C. After keeping it warm for 2 hours, hot-install it on the core mold of the spinning machine; perform the first spinning process on the spun blank; after completing the first spinning process, the spinning wheel withdraws and returns to the initial spinning position, and the second spinning process begins. After completing the second spinning process, the spinning wheel withdraws and returns to the initial spinning position; repeat the second spinning process until the spinning forming of the cathode roller titanium cylinder is completed, and the deformation amount of each pass is moderate to prevent the titanium cylinder from being severely deformed due to excessive deformation and unable to achieve the required dimensional accuracy; withdraw the spinning wheel, unload the spun titanium cylinder from the spinning machine, and obtain the initially formed cathode roller titanium cylinder; during the spinning process, keep the temperature of the spun titanium cylinder at 550°C; the thinning amount of each pass is 5mm; prevent the titanium cylinder from being severely deformed due to excessive deformation and unable to achieve the required dimensional accuracy, or prevent the deformation resistance from increasing due to too low temperature, and the size after forming cannot meet the requirements;

[0042] Step 6: Annealing the initially formed cathode roller titanium cylinder obtained by spinning in step 5, raising the furnace temperature to 580°C, opening the furnace cover, placing the initially formed cathode roller titanium cylinder, and closing the furnace cover; keeping the temperature at 580°C for 6 hours, opening the furnace cover, air cooling to room temperature, and regulating the titanium cylinder microstructure by annealing to obtain a titanium cylinder with uniform and fine grain size;

[0043] Step 7: Cut the cathode roller titanium cylinder annealed in step 6 to a height of 600 mm, remove the surface oxide scale and defects by machining, and polish until the surface is smooth and defect-free to obtain a corrosion-resistant cathode roller titanium cylinder.

[0044] Beneficial effects of this embodiment: Figure 1 , Figure 1 This is the electron microscope image of the cathode roller titanium cylinder prepared in Example 1. It can be seen that since this embodiment adopts multi-directional forging, high-force spinning and appropriate annealing treatment, the prepared cathode roller titanium cylinder has uniform and fine grains, and the grain size grade can reach 9.0; since this embodiment adds 0.1% Mo element, the grinding frequency of the cathode roller is reduced to once every 6 weeks.

[0045] Example 2

[0046] A corrosion-resistant cathode roller titanium cylinder, whose material components are as follows by weight percentage: Mo: 0.3%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the content of each of other impurity elements is less than 0.05%.

[0047] A method for manufacturing a corrosion-resistant cathode roller titanium cylinder, preparing a cathode roller titanium cylinder of φ3000mm×1380mm, comprising the following steps:

[0048] Step 1: Use a vacuum consumable arc furnace to smelt titanium sponge and molybdenum particles. The weight percentage of the titanium ingot obtained after smelting is as follows: Mo: 0.3%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the single content of other impurity elements is less than 0.05%;

[0049] Step 2: homogenizing annealing the titanium ingot obtained by smelting in step 1 at 1300° C. for 3 hours. Annealing at this temperature can ensure that the alloy elements in the titanium ingot are evenly dispersed and distributed, thereby preventing defects caused by element segregation in subsequent production;

[0050] Step 3: Multi-directional forging is performed on the titanium ingot after annealing in step 2. First, the titanium ingot is kept at 1200℃ for 6h, and then multiple upsetting-drawing forging is performed. The pressing speed is 400mm / min, and the upsetting reduction is 65% and the drawing reduction is 55% in each pass. The multi-directional forging is performed for no less than 3 times, and each pass requires three upsetting and three drawing forgings. The purpose is to eliminate the deformation dead zone, so that the microstructure of the billet in all directions is more uniform, the mechanical properties in all directions are uniform, and the anisotropy is weak, so that subsequent deformation is easier to carry out; after the multi-directional forging is completed, the titanium ingot is punched with a hole diameter of 320mm. The punching is because the core roller of the ring-binding machine needs to be worn during the rolling process. The size is selected based on the core roller size of the equipment used. After forging and punching, the outer surface temperature of the titanium ingot is not less than 600°C. If the temperature of the titanium ingot is too low, the deformation amount will be smaller under the same pressure, and the deformation dead zone will not be eliminated and the anisotropy of the titanium ingot will not be reduced. Therefore, controlling the temperature of the titanium ingot at the end of forging can ensure that the titanium ingot is fully deformed and convenient for subsequent processing. After punching, the titanium ingot is naturally cooled to room temperature, and its surface is polished to remove cracks and scratches on the inner and outer surfaces to prevent the surface defects from affecting the deformation of the material during the subsequent deformation process, thereby forming defects on the surface or inside of the material.

[0051] Step 4: After the ingot processed in step 3 is kept at 750°C for 4 hours, it is formed into a ring with a diameter of φ3000mm, cooled naturally to room temperature, and the oxide layer on the surface of the titanium ring is removed by machining to prevent the surface defects from affecting the deformation of the material during the subsequent deformation process, thereby forming defects on the surface or inside the material;

[0052] Step 5: Place the spun blank after removing the oxide layer in step 4 in an electric furnace and heat it to 680°C. After keeping it warm for 2.5 hours, hot-install it on the core mold of the spinning machine; perform the first spinning process on the spun blank; after completing the first spinning process, the spinning wheel withdraws and returns to the initial spinning position, and the second spinning process begins. After completing the second spinning process, the spinning wheel withdraws and returns to the initial spinning position; repeat the second spinning process until the spinning forming of the cathode roller titanium cylinder is completed, and the deformation amount of each pass is moderate to prevent the titanium cylinder from being severely deformed due to excessive deformation and unable to achieve the required dimensional accuracy; withdraw the spinning wheel, unload the spun titanium cylinder from the spinning machine, and obtain the initially formed cathode roller titanium cylinder; during the spinning process, keep the temperature of the spun titanium cylinder at 600°C; the thinning amount of each pass is 6mm; prevent the titanium cylinder from being severely deformed due to excessive deformation and unable to achieve the required dimensional accuracy, or prevent the deformation resistance from increasing due to too low temperature, and the size after forming cannot meet the requirements;

[0053] Step 6: Annealing the initially formed cathode roller titanium cylinder obtained by spinning in step 5, raising the furnace temperature to 630°C, opening the furnace cover, placing the initially formed cathode roller titanium cylinder, and closing the furnace cover; keeping the temperature at 630°C for 7 hours, opening the furnace cover, and air cooling to room temperature; regulating the microstructure of the titanium cylinder by annealing to obtain a titanium cylinder with uniform and fine grain size;

[0054] Step 7: Cut the cathode roller titanium cylinder annealed in step 6 to a height of 1380 mm, remove the surface oxide scale and defects by machining, and polish until the surface is smooth and defect-free to obtain a corrosion-resistant cathode roller titanium cylinder.

[0055] Beneficial effects of this embodiment: Figure 2 , Figure 2 This is the electron microscope image of the cathode roller titanium cylinder prepared in Example 2. It can be seen that since this embodiment adopts multi-directional forging, high-force spinning and appropriate annealing treatment, the prepared cathode roller titanium cylinder has uniform and fine grains, and the grain size grade can reach above 10.5; since this embodiment adds 0.3% Mo element, the grinding frequency of the cathode roller is reduced to once every 8 weeks.

[0056] Example 3

[0057] A corrosion-resistant cathode roller titanium cylinder, whose material components are as follows by weight percentage: Mo: 0.2%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the content of each of other impurity elements is less than 0.05%.

[0058] A method for manufacturing a corrosion-resistant cathode roller titanium cylinder, preparing a cathode roller titanium cylinder of φ2700mm×1200mm, comprising the following steps:

[0059] Step 1: Use a vacuum consumable arc furnace to smelt titanium sponge and molybdenum particles. The weight percentage of the titanium ingot obtained after smelting is as follows: Mo: 0.2%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the content of each of other impurity elements is less than 0.05%;

[0060] Step 2: homogenizing annealing the titanium ingot smelted in step 1 at 1200° C. for 3 hours. Annealing at this temperature can ensure uniform dispersion of alloy elements in the titanium ingot and prevent defects caused by element segregation in subsequent production.

[0061] Step 3: Multi-directional forging is performed on the titanium ingot annealed in step 2. First, the titanium ingot is kept at 1100℃ for 6h, and then multiple roughening-drawing forging is performed. The pressing speed is 300mm / min, the roughening reduction is 65% in each pass, and the drawing reduction is 55%. The multi-directional forging is performed for no less than 3 passes, and each pass requires three roughening and three drawing forgings. The purpose is to eliminate the deformation dead zone, so that the microstructure of the billet in all directions is more uniform, the mechanical properties in all directions are uniform, and the anisotropy is weak, so that subsequent deformation is easier to carry out; after the multi-directional forging is completed, the titanium ingot is punched with a hole diameter of 310mm. The punching is because the core roller of the ring-binding machine needs to pass through during the rolling process. The size of the blank is selected depending on the size of the core roller of the equipment used; the outer surface temperature of the titanium ingot after forging and punching is not less than 600°C; if the temperature of the titanium ingot is too low, the deformation amount under the same pressure will become smaller, thus failing to eliminate the deformation dead zone and reduce the anisotropy of the titanium ingot. Therefore, controlling the temperature of the titanium ingot at the end of forging can ensure that the titanium ingot is fully deformed and convenient for subsequent processing; the titanium ingot after punching is naturally cooled to room temperature, and its surface is polished to remove cracks and scratches on the inner and outer surfaces to prevent the surface defects from affecting the deformation of the material during the subsequent deformation process due to the presence of surface defects, thereby forming defects on the surface or inside of the material;

[0062] Step 4: After the ingot processed in step 3 is kept at 700°C for 4 hours, it is ring-formed to φ2700mm, cooled naturally to room temperature, and the oxide layer on the surface of the titanium ring is removed by machining to prevent the surface defects from affecting the deformation of the material during the subsequent deformation process, thereby forming defects on the surface or inside the material;

[0063] Step 5: Place the spun blank after removing the oxide layer in step 4 in an electric furnace and heat it to 670°C. After keeping it warm for 2.5 hours, hot-install it on the core mold of the spinning machine; perform the first spinning process on the spun blank; after completing the first spinning process, the spinning wheel withdraws and returns to the initial spinning position, and the second spinning process begins. After completing the second spinning process, the spinning wheel withdraws and returns to the initial spinning position; repeat the second spinning process until the spinning forming of the cathode roller titanium cylinder is completed, and the deformation amount of each pass is moderate to prevent the titanium cylinder from being severely deformed due to excessive deformation and unable to achieve the required dimensional accuracy; withdraw the spinning wheel, unload the spun titanium cylinder from the spinning machine, and obtain the initially formed cathode roller titanium cylinder; during the spinning process, keep the temperature of the spun titanium cylinder at 650°C; the thinning amount of each pass is 6mm to prevent the titanium cylinder from being severely deformed due to excessive deformation and unable to achieve the required dimensional accuracy, or the deformation resistance increases due to too low temperature, and the size after forming cannot meet the requirements;

[0064] Step 6: Annealing the initially formed cathode roller titanium cylinder obtained by spinning in step 5, raising the furnace temperature to 610°C, opening the furnace cover, placing the initially formed cathode roller titanium cylinder, and closing the furnace cover; keeping the temperature at 610°C for 7 hours, opening the furnace cover, and air cooling to room temperature; regulating the microstructure of the titanium cylinder by annealing to obtain a titanium cylinder with uniform and fine grain size;

[0065] Step 7: Cut the cathode roller titanium cylinder annealed in step 6 to a height of 1200 mm, remove the surface oxide scale and defects by machining, and polish until the surface is smooth and defect-free to obtain a corrosion-resistant cathode roller titanium cylinder.

[0066] Beneficial effects of this embodiment: Figure 3 , Figure 3 This is the electron microscope image of the cathode roller titanium cylinder prepared in Example 3. It can be seen that since this embodiment adopts multi-directional forging, high-force spinning and appropriate annealing treatment, the prepared cathode roller titanium cylinder has uniform and fine grains, and the grain size grade can reach above 11.5; since this embodiment adds 0.2% Mo element, the grinding frequency of the cathode roller is reduced to once every 10 weeks.

[0067] Example 4

[0068] A corrosion-resistant cathode roller titanium cylinder, whose material components are as follows by weight percentage: Mo: 0.1%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the content of each of other impurity elements is less than 0.05%.

[0069] A method for manufacturing a corrosion-resistant cathode roller titanium cylinder, preparing a cathode roller titanium cylinder of φ2700mm×1860mm, comprising the following steps:

[0070] Step 1: Use a vacuum consumable arc furnace to smelt titanium sponge and molybdenum particles. The weight percentage of the titanium ingot obtained after smelting is as follows: Mo: 0.1%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the content of each of other impurity elements is less than 0.05%;

[0071] Step 2: The titanium ingot obtained by smelting in step 1 is subjected to homogenization annealing at 1200° C. for 4 hours. Annealing at this temperature can ensure that the alloy elements in the titanium ingot are evenly dispersed and prevent defects caused by element segregation in subsequent production.

[0072] Step 3: Multi-directional forging is performed on the titanium ingot annealed in step 2. First, the titanium ingot is kept at 1100℃ for 7h, and then multiple upsetting-drawing forging is performed. The pressing speed is 300mm / min, the upsetting reduction is 70% in each pass, and the drawing reduction is 55%. The multi-directional forging is performed for no less than 3 times, and each pass requires three upsetting and three drawing forgings. The purpose is to eliminate the deformation dead zone, so that the microstructure of the billet in all directions is more uniform, the mechanical properties in all directions are uniform, and the anisotropy is weak, so that subsequent deformation is easier to carry out; after the multi-directional forging is completed, the titanium ingot is punched with a hole diameter of 300-320mm. The punching is because the core roller of the ring-binding machine needs to be The size of the titanium ingot is selected to work through the blank. The size of the core roller used depends on the size of the core roller of the equipment used. After forging and punching, the outer surface temperature of the titanium ingot is not less than 600°C. If the temperature of the titanium ingot is too low, the deformation amount will be smaller under the same pressure, which will fail to eliminate the deformation dead zone and reduce the anisotropy of the titanium ingot. Therefore, controlling the temperature of the titanium ingot at the end of forging can ensure that the titanium ingot is fully deformed and convenient for subsequent processing. After punching, the titanium ingot is naturally cooled to room temperature, and its surface is polished to remove cracks and scratches on the inner and outer surfaces to prevent the surface defects from affecting the deformation of the material during the subsequent deformation process due to the presence of surface defects, thereby forming defects on the surface or inside of the material.

[0073] Step 4: After the ingot processed in step 3 is kept at 700°C for 5 hours, it is ring-formed to φ2700mm, cooled naturally to room temperature, and the oxide layer on the surface of the titanium ring is removed by machining to prevent the surface defects from affecting the deformation of the material during the subsequent deformation process, thereby forming defects on the surface or inside the material;

[0074] Step 5: Place the spun blank after removing the oxide layer in step 4 in an electric furnace and heat it to 670°C. After keeping it warm for 3 hours, hot-install it on the core mold of the spinning machine; perform the first spinning process on the spun blank; after completing the first spinning process, the spinning wheel withdraws and returns to the initial spinning position, and the second spinning process begins. After completing the second spinning process, the spinning wheel withdraws and returns to the initial spinning position; repeat the second spinning process until the spinning forming of the cathode roller titanium cylinder is completed, and the deformation amount of each pass is moderate to prevent the titanium cylinder from being severely deformed due to excessive deformation and unable to achieve the required dimensional accuracy; withdraw the spinning wheel, unload the spun titanium cylinder from the spinning machine, and obtain the initially formed cathode roller titanium cylinder; during the spinning process, keep the temperature of the spun titanium cylinder at 550-650°C; the thinning amount of each pass is 6mm to prevent the titanium cylinder from being severely deformed due to excessive deformation and unable to achieve the required dimensional accuracy, or the deformation resistance increases due to too low temperature, and the size after forming cannot meet the requirements;

[0075] Step 6: Annealing the initially formed cathode roller titanium cylinder obtained by spinning in step 5, raising the furnace temperature to 610°C, opening the furnace cover, placing the initially formed cathode roller titanium cylinder, and closing the furnace cover; keeping the temperature at 610°C for 8 hours, opening the furnace cover, air cooling to room temperature, and regulating the titanium cylinder microstructure by annealing to obtain a titanium cylinder with uniform and fine grain size;

[0076] Step 7: Cut the cathode roller titanium cylinder annealed in step 6 to a height of 1860 mm, remove the surface oxide scale and defects by machining, and polish until the surface is smooth and defect-free to obtain a corrosion-resistant cathode roller titanium cylinder.

[0077] Beneficial effects of this embodiment: Figure 4 , Figure 4 This is the electron microscope image of the cathode roller titanium cylinder prepared in Example 4. It can be seen that since this embodiment adopts multi-directional forging, high-force spinning and appropriate annealing treatment, the prepared cathode roller titanium cylinder has uniform and fine grains, and the grain size grade can reach above 11.0; since this embodiment adds 0.1% Mo element, the grinding frequency of the cathode roller is reduced to once every 6.5 weeks.

[0078] Example 5

[0079] A corrosion-resistant cathode roller titanium cylinder, whose material components are as follows by weight percentage: Mo: 0.2%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the content of each of other impurity elements is less than 0.05%.

[0080] A method for manufacturing a corrosion-resistant cathode roller titanium cylinder, preparing a cathode roller titanium cylinder of φ3600mm×1050mm, comprising the following steps:

[0081] Step 1: Use a vacuum consumable arc furnace to smelt titanium sponge and molybdenum particles. The weight percentage of the titanium ingot obtained after smelting is as follows: Mo: 0.2%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the content of each of other impurity elements is less than 0.05%;

[0082] Step 2: Perform homogenization annealing on the titanium ingot smelted in step 1 at 1300°C for 4 hours. Annealing at this temperature can ensure that the alloy elements in the titanium ingot are evenly dispersed and prevent defects caused by element segregation in subsequent production.

[0083] Step 3: Multi-directional forging is performed on the titanium ingot annealed in step 2. First, the titanium ingot is kept at 1200℃ for 8h, and then multiple upsetting-drawing forging is performed. The pressing speed is 400mm / min, and the upsetting reduction is 70% and the drawing reduction is 60% in each pass. The multi-directional forging is performed for no less than 3 times, and each pass requires three upsetting and three drawing forgings. The purpose is to eliminate the deformation dead zone, so that the microstructure of the billet in all directions is more uniform, the mechanical properties in all directions are uniform, and the anisotropy is weak, so that the subsequent deformation is easier to carry out; after the multi-directional forging is completed, the titanium ingot is punched with a hole diameter of 300-320mm. The punching is because the core roller of the ring-binding machine needs to be The size of the titanium ingot is selected to work through the blank. The size of the core roller used depends on the size of the core roller of the equipment used. After forging and punching, the outer surface temperature of the titanium ingot is not less than 600°C. If the temperature of the titanium ingot is too low, the deformation amount will be smaller under the same pressure, which will fail to eliminate the deformation dead zone and reduce the anisotropy of the titanium ingot. Therefore, controlling the temperature of the titanium ingot at the end of forging can ensure that the titanium ingot is fully deformed and convenient for subsequent processing. After punching, the titanium ingot is naturally cooled to room temperature, and its surface is polished to remove cracks and scratches on the inner and outer surfaces to prevent the surface defects from affecting the deformation of the material during the subsequent deformation process due to the presence of surface defects, thereby forming defects on the surface or inside of the material.

[0084] Step 4: After the ingot processed in step 3 is kept at 750°C for 5 hours, it is ring-formed to φ3600mm, cooled naturally to room temperature, and the oxide layer on the surface of the titanium ring is removed by machining to prevent the surface defects from affecting the deformation of the material during the subsequent deformation process, thereby forming defects on the surface or inside the material;

[0085] Step 5: Place the spun blank after removing the oxide layer in step 4 in an electric furnace and heat it to 680°C. After keeping it warm for 3 hours, hot-install it on the core mold of the spinning machine; perform the first spinning process on the spun blank; after completing the first spinning process, the spinning wheel withdraws and returns to the initial spinning position, and the second spinning process begins. After completing the second spinning process, the spinning wheel withdraws and returns to the initial spinning position; repeat the second spinning process until the spinning forming of the cathode roller titanium cylinder is completed, and the deformation amount of each pass is moderate to prevent the titanium cylinder from being severely deformed due to excessive deformation and unable to achieve the required dimensional accuracy; withdraw the spinning wheel, unload the spun titanium cylinder from the spinning machine, and obtain the initially formed cathode roller titanium cylinder; during the spinning process, keep the temperature of the spun titanium cylinder at 550-650°C; the thinning amount of each pass is 7mm to prevent the titanium cylinder from being severely deformed due to excessive deformation and unable to achieve the required dimensional accuracy, or the deformation resistance increases due to too low temperature, and the size after forming cannot meet the requirements;

[0086] Step 6: Annealing the initially formed cathode roller titanium cylinder obtained by spinning in step 5, raising the furnace temperature to 630°C, opening the furnace cover, placing the initially formed cathode roller titanium cylinder, and closing the furnace cover; keeping the temperature at 630°C for 8 hours, opening the furnace cover, air cooling to room temperature, and regulating the titanium cylinder microstructure by annealing to obtain a titanium cylinder with uniform and fine grain size;

[0087] Step 7: Cut the cathode roller titanium cylinder annealed in step 6 to a height of 1050 mm, remove the surface oxide scale and defects by machining, and polish until the surface is smooth and defect-free to obtain a corrosion-resistant cathode roller titanium cylinder.

[0088] Beneficial effects of this embodiment: Figure 5 , Figure 5 This is the electron microscope image of the cathode roller titanium cylinder prepared in Example 5. It can be seen that since this embodiment adopts multi-directional forging, high-force spinning and appropriate annealing treatment, the prepared cathode roller titanium cylinder has uniform and fine grains, and the grain size grade can reach above 10.0; since this embodiment adds 0.2% Mo element, the grinding frequency of the cathode roller is reduced to once every 7 weeks.

Claims

1. A corrosion-resistant cathode roller titanium cylinder, characterized in that: By weight percentage, Mo: 0.1-0.3%, Fe<0.06%, C<0.02%, N<0.02%, H<0.01%, O<0.06%, the total content of other impurity elements is <0.2%, and the rest is titanium; the content of each other impurity element is <0.06%.

2. A method for manufacturing a corrosion-resistant cathode roller titanium cylinder, characterized in that: The following steps are involved: Step 1: Use a vacuum consumable arc furnace to smelt titanium sponge and molybdenum particles. The weight percentage of the titanium ingot obtained after smelting is as follows: Mo: 0.1-0.3%, Fe < 0.06%, C < 0.02%, N < 0.02%, H < 0.01%, O < 0.06%, the total content of other impurity elements < 0.2%, and the rest is titanium; the single content of other impurity elements is < 0.06%; Step 2: homogenizing annealing the titanium ingot smelted in step 1 at 1100-1300°C for 2-4 hours; Step 3: multi-directional forging the titanium ingot annealed in step 2, first keep the titanium ingot at 1050-1200°C for 4-8h, and then perform multiple roughing-drawing forging, the pressing speed is 200-400mm / min, the roughing reduction is 60-70% in each pass, the drawing reduction is 50-60%, the multi-directional forging is not less than 3 passes, and each pass requires more than three roughing and more than three drawing forgings; after the multi-directional forging is completed, the titanium ingot is punched, and the hole diameter is 300-320mm; after forging and punching, the outer surface temperature of the titanium ingot is not lower than 600°C; the titanium ingot after punching is naturally cooled to room temperature, and its surface is polished to remove cracks and scratches on the inner and outer surfaces; Step 4: After the ingot processed in step 3 is kept at 600-750°C for 3-5 hours, it is formed into a desired size by ring tying, cooled naturally to room temperature, and the oxide layer on the surface of the titanium ring is removed by machining; Step 5: Place the spun blank after removing the oxide layer in step 4 in an electric furnace and heat it to 650-680°C. After keeping warm for 2-3 hours, hot-install it on the core mold of the spinning machine; perform the first spinning process on the spun blank; after completing the first spinning process, the spinning wheel withdraws and returns to the initial spinning position, and the second spinning process begins. After completing the second spinning process, the spinning wheel withdraws and returns to the initial spinning position; repeat the second spinning process until the spinning forming of the cathode roller titanium cylinder is completed; withdraw the spinning wheel, unload the spun titanium cylinder from the spinning machine, and obtain the initially formed cathode roller titanium cylinder; during the spinning process, keep the temperature of the spun titanium cylinder at 550-650°C; the thinning amount of each pass is 5-7mm; Step 6: Annealing the initially formed cathode roller titanium cylinder obtained by spinning in step 5, raising the furnace temperature to 580-630°C, opening the furnace cover, placing the initially formed cathode roller titanium cylinder, and closing the furnace cover; keeping the temperature at 580-630°C for 6-8h, then opening the furnace cover, and air cooling to room temperature; Step 7: Cut the cathode roller titanium cylinder annealed in step 6 to the required size, remove the surface oxide scale and defects by machining, and polish until the surface is smooth and defect-free to obtain a corrosion-resistant cathode roller titanium cylinder.

3. A corrosion-resistant cathode roller titanium cylinder, characterized in that: Prepared by the method of claim 2 above.

4. A corrosion-resistant cathode roller titanium cylinder, characterized in that: In terms of weight percentage, its components are: Mo: 0.1%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the content of each of other impurity elements is less than 0.05%.

5. The method for manufacturing a corrosion-resistant cathode roller titanium cylinder according to claim 4, wherein a cathode roller titanium cylinder of φ500mm×600mm is prepared, characterized in that: The following steps are involved: Step 1: Use a vacuum consumable arc furnace to smelt titanium sponge and molybdenum particles. The weight percentage of the titanium ingot obtained after smelting is as follows: Mo: 0.1%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the content of each of other impurity elements is less than 0.05%; Step 2: homogenizing annealing the titanium ingot smelted in step 1 at 1100°C for 2 hours; Step 3: multi-directional forging the titanium ingot annealed in step 2, first keep the titanium ingot at 1050°C for 4h, and then perform multiple upsetting-drawing forging, the pressing speed is 200mm / min, the upsetting reduction is 60% in each pass, the drawing reduction is 50%, the multi-directional forging is not less than 3 passes, and each pass requires three upsetting and three drawing forging; after the multi-directional forging is completed, the titanium ingot is punched, and the hole diameter is 300mm; after forging and punching, the outer surface temperature of the titanium ingot is not lower than 600°C; the titanium ingot after punching is naturally cooled to room temperature, and its surface is polished to remove cracks and scratches on the inner and outer surfaces; Step 4: After the ingot processed in step 3 is kept at 600°C for 3 hours, it is ring-formed to φ500mm, cooled naturally to room temperature, and the oxide layer on the surface of the titanium ring is removed by machining; Step 5: Place the spun blank after removing the oxide layer in step 4 in an electric furnace and heat it to 650°C. After keeping it warm for 2 hours, hot-install it on the core mold of the spinning machine; perform the first spinning process on the spun blank; after completing the first spinning process, the spinning wheel withdraws and returns to the initial spinning position, and the second spinning process begins. After completing the second spinning process, the spinning wheel withdraws and returns to the initial spinning position; repeat the second spinning process until the spinning forming of the cathode roller titanium cylinder is completed; withdraw the spinning wheel, unload the spun titanium cylinder from the spinning machine, and obtain the initially formed cathode roller titanium cylinder; during the spinning process, keep the temperature of the spun titanium cylinder at 550°C; the thinning amount of each pass is 5mm; Step 6: Annealing the initially formed cathode roller titanium cylinder obtained by spinning in step 5, raising the furnace temperature to 580°C, opening the furnace cover, placing the initially formed cathode roller titanium cylinder, and closing the furnace cover; keeping the temperature at 580°C for 6 hours, then opening the furnace cover and air cooling to room temperature; Step 7: Cut the cathode roller titanium cylinder annealed in step 6 to a height of 600 mm, remove the surface oxide scale and defects by machining, and polish until the surface is smooth and defect-free to obtain a corrosion-resistant cathode roller titanium cylinder.

6. A corrosion-resistant cathode roller titanium cylinder, characterized in that: In terms of weight percentage, its components are: Mo: 0.3%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the content of each of other impurity elements is less than 0.05%.

7. A method for manufacturing a corrosion-resistant cathode roller titanium cylinder according to claim 6, wherein a cathode roller titanium cylinder of φ3000mm×1380mm is prepared, characterized in that: The following steps are involved: Step 1: Use a vacuum consumable arc furnace to smelt titanium sponge and molybdenum particles. The weight percentage of the titanium ingot obtained after smelting is as follows: Mo: 0.3%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the single content of other impurity elements is less than 0.05%; Step 2: homogenizing annealing the titanium ingot smelted in step 1 at 1300°C for 3 hours; Step 3: multi-directional forging the titanium ingot annealed in step 2, first keep the titanium ingot at 1200°C for 6h, and then perform multiple upsetting-drawing forging, the pressing speed is 400mm / min, the upsetting reduction is 65% in each pass, the drawing reduction is 55%, the multi-directional forging is not less than 3 passes, and each pass requires three upsetting and three drawing forging; after the multi-directional forging is completed, the titanium ingot is punched, and the hole diameter is 320mm; after forging and punching, the outer surface temperature of the titanium ingot is not lower than 600°C; after punching, the titanium ingot is naturally cooled to room temperature, and its surface is polished to remove cracks and scratches on the inner and outer surfaces; Step 4: After the ingot processed in step 3 is kept at 750°C for 4 hours, it is ring-formed to φ3000mm, cooled naturally to room temperature, and the oxide layer on the surface of the titanium ring is removed by machining; Step 5: Place the spun blank after removing the oxide layer in step 4 in an electric furnace and heat it to 680°C. After keeping it warm for 2.5 hours, hot-install it on the core mold of the spinning machine; perform the first spinning process on the spun blank; after completing the first spinning process, the spinning wheel withdraws and returns to the initial spinning position, and the second spinning process begins. After completing the second spinning process, the spinning wheel withdraws and returns to the initial spinning position; repeat the second spinning process until the spinning forming of the cathode roller titanium cylinder is completed; withdraw the spinning wheel, unload the spun titanium cylinder from the spinning machine, and obtain the initially formed cathode roller titanium cylinder; during the spinning process, keep the temperature of the spun titanium cylinder at 600°C; the thinning amount of each pass is 6mm; Step 6: Annealing the initially formed cathode roller titanium cylinder obtained by spinning in step 5, raising the furnace temperature to 630°C, opening the furnace cover, placing the initially formed cathode roller titanium cylinder, and closing the furnace cover; keeping the temperature at 630°C for 7 hours, then opening the furnace cover and air cooling to room temperature; Step 7: Cut the cathode roller titanium cylinder annealed in step 6 to a height of 1380 mm, remove the surface oxide scale and defects by machining, and polish until the surface is smooth and defect-free to obtain a corrosion-resistant cathode roller titanium cylinder.

8. A corrosion-resistant cathode roller titanium cylinder, characterized in that: In terms of weight percentage, its components are: Mo: 0.2%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the content of each of other impurity elements is less than 0.05%.

9. A method for manufacturing a corrosion-resistant cathode roller titanium cylinder according to claim 8, for preparing a cathode roller titanium cylinder of φ2700mm×1200mm, characterized in that: The following steps are involved: Step 1: Use a vacuum consumable arc furnace to smelt titanium sponge and molybdenum particles. The weight percentage of the titanium ingot obtained after smelting is as follows: Mo: 0.2%, Fe: 0.05%, C: 0.015%, N: 0.009%, H: 0.004%, O: 0.02%, the total content of other impurity elements is less than 0.2%, and the rest is titanium; the content of each of other impurity elements is less than 0.05%; Step 2: homogenizing annealing the titanium ingot smelted in step 1 at 1200°C for 3 hours; Step 3: multi-directional forging the titanium ingot annealed in step 2, first keep the titanium ingot at 1100°C for 6h, and then perform multiple upsetting-drawing forging, the pressing speed is 300mm / min, the upsetting reduction is 65% in each pass, the drawing reduction is 55%, the multi-directional forging is not less than 3 passes, and each pass requires three upsetting and three drawing forging; after the multi-directional forging is completed, the titanium ingot is punched, and the hole diameter is 310mm; after forging and punching, the outer surface temperature of the titanium ingot is not lower than 600°C; after punching, the titanium ingot is naturally cooled to room temperature, and its surface is polished to remove cracks and scratches on the inner and outer surfaces; Step 4: After the ingot processed in step 3 is kept at 700°C for 4 hours, it is ring-formed to φ2700mm, cooled naturally to room temperature, and the oxide layer on the surface of the titanium ring is removed by machining; Step 5: Place the spun blank after removing the oxide layer in step 4 in an electric furnace and heat it to 670°C. After keeping it warm for 2.5 hours, hot-install it on the core mold of the spinning machine; perform the first spinning process on the spun blank; after completing the first spinning process, the spinning wheel withdraws and returns to the initial spinning position, and the second spinning process begins. After completing the second spinning process, the spinning wheel withdraws and returns to the initial spinning position; repeat the second spinning process until the spinning forming of the cathode roller titanium cylinder is completed; withdraw the spinning wheel, unload the spun titanium cylinder from the spinning machine, and obtain the initially formed cathode roller titanium cylinder; during the spinning process, keep the temperature of the spun titanium cylinder at 650°C; the thinning amount of each pass is 6mm; Step 6: Annealing the initially formed cathode roller titanium cylinder obtained by spinning in step 5, raising the furnace temperature to 610°C, opening the furnace cover, placing the initially formed cathode roller titanium cylinder, and closing the furnace cover; keeping the temperature at 610°C for 7 hours, then opening the furnace cover and air cooling to room temperature; Step 7: Cut the cathode roller titanium cylinder annealed in step 6 to a height of 1200 mm, remove the surface oxide scale and defects by machining, and polish until the surface is smooth and defect-free to obtain a corrosion-resistant cathode roller titanium cylinder.

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