A smelting process method for producing corrosion-resistant steel containing titanium by argon blowing refining process

Abstract

The present application relates to a kind of argon blowing refining process production titanium-containing corrosion-resistant steel smelting process method, the method includes the following steps: step 1: converter tapping process non-metallic inclusion control, step 2: argon station before ladle top slag composition control, step 3: argon station refining treatment process non-metallic inclusion control, step 4: by wire feeding process Ti alloy is added, step 5: non-metallic inclusion control before argon station off station, step 6: non-metallic inclusion control in pouring process.The scheme is to control the generation of high-melting-point calcium aluminate inclusions by adjusting the deoxidation method, and to reduce the generation of TiO2 inclusions by feeding the core wire, so as to produce titanium-containing corrosion-resistant steel by argon blowing refining process without using LF refining process.

Description

Technical Field

[0001] This invention relates to a method, specifically to an argon blowing refining process for producing titanium-containing corrosion-resistant steel, belonging to the field of steelmaking and smelting technology. Background Technology

[0002] The key challenge in the smelting process of titanium-containing corrosion-resistant steel lies in the control of non-metallic inclusions. Specifically, firstly, the deoxidizing alloy added during the tapping process contains some Ca, and the deoxidation product Al2O3 inclusions form high-melting-point calcium aluminate compounds. Secondly, the Ti alloy used to adjust the Ti content in the steel during refining is sprinkled onto the surface of the top slag of the ladle through a hopper. Because its density is lower than that of molten steel, it can only enter the molten steel through the stirring action of bottom-blown argon. Therefore, the Ti alloy remains on the surface for a long time and is easily oxidized by oxygen in the air and oxides (FeO and MnO) in the slag to form high-melting-point TiO2 inclusions.

[0003] Before casting, if the molten steel contains a large amount of high-melting-point calcium aluminate compounds and TiO2 inclusions, these inclusions tend to accumulate at the stopper rod and submerged entry nozzle, causing blockages. This exacerbates the turbulence of the molten steel flowing through the stopper rod and submerged entry nozzle, leading to fluctuations in the crystallizer level. Simultaneously, under the scouring action of the molten steel, non-metallic inclusions accumulated at the stopper rod or submerged entry nozzle easily fall into the molten steel within the crystallizer. The presence of these high-melting-point inclusions not only causes severe fluctuations in the crystallizer level, but the detached nodules that are not promptly removed from the crystallizer also seriously degrade the performance of the final product. In other words, the high-melting-point calcium aluminate compounds and TiO2 inclusions formed during the smelting process worsen the castability of Ti-containing corrosion-resistant steel.

[0004] Currently, to improve the castability of Ti-containing corrosion-resistant steel, an LF furnace refining process is employed to remove non-metallic inclusions and improve the cleanliness of the molten steel, thereby enhancing its castability. However, the LF furnace processing cost is 50 yuan per ton of molten steel. Therefore, this technology not only increases steelmaking costs but also prolongs the steelmaking process and reduces steelmaking efficiency.

[0005] A patent search revealed that Chinese patent "CN 107557676 A" discloses high-strength corrosion-resistant steel strand wire rod and its production method. This method mainly produces high-strength corrosion-resistant steel through composition design, and the smelting process includes the LF process. Chinese patent "CN 105886902 A" discloses a 400MPa grade vanadium-containing earthquake-resistant and corrosion-resistant steel bar and its production method. This method produces 400MPa grade vanadium-containing earthquake-resistant and corrosion-resistant steel bars through composition design, converter or electric furnace smelting, ladle micro-alloying, ladle refining, continuous casting, billet heating, rolling, and air cooling. Chinese patent "CN 108251746 A" discloses a high-weather-resistant, low-cost seawater corrosion-resistant steel bar and its production process. This method produces weather-resistant, low-cost seawater corrosion-resistant steel bars through composition design, and the smelting process involves the LF process. Chinese patent "CN 106048386 A" discloses a smelting process for casting wear-resistant and corrosion-resistant steel using an induction furnace. This method employs an induction furnace smelting process to manufacture wear-resistant and corrosion-resistant steel. Chinese patent "CN101519710 A" discloses a method for controlling non-metallic inclusions in alloy structural steel. This method improves the purity of the steel by controlling the composition and size of non-metallic inclusions in the steel through the production process, thereby improving the performance of the steel product. Chinese patent "CN106906330 A" discloses a method for controlling non-metallic inclusions in LX72A cord steel. This method controls the quantity and morphology of inclusions through converter endpoint control, slag CaO and FeO content control, and bottom-blown argon process. Currently, no patents or documents similar to this invention have been found. Summary of the Invention

[0006] This invention addresses the problems existing in the prior art by providing a smelting process for producing titanium-containing corrosion-resistant steel using argon blowing refining. This method controls the formation of high-melting-point calcium aluminate inclusions by adjusting the deoxidation method and reduces the formation of TiO2 inclusions by feeding cored wire, thereby achieving the production of titanium-containing corrosion-resistant steel solely through argon blowing refining without LF refining. The key to producing titanium-containing corrosion-resistant steel using argon blowing refining lies in controlling the formation of high-melting-point calcium aluminate and TiO2 inclusions. To solve the problem of high-melting-point calcium aluminate inclusion formation, this invention uses a Si-Mn deoxidizer for pre-deoxidation during the steel tapping process, followed by a final deoxidation process using Al wire feeding at the Ar station to form a SiO2-MnO-Al2O3 composite low-melting-point inclusion. To solve the TiO2 inclusion formation problem, this invention uses cored wire instead of ferrotitanium alloy and adjusts the Ti content in the molten steel through wire feeding. Because the cored wire consists of a Fe outer layer encasing a Ti core, and is fed directly into the molten steel, this avoids contact between the Ti and oxides in the slag. Therefore, the Ti-feeding wire process can prevent the formation of TiO2 inclusions during smelting.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: a method for producing Ti-containing corrosion-resistant steel using a direct argon blowing process, comprising the following steps:

[0008] Step 1: Control of non-metallic inclusions during converter tapping. The target temperature of molten steel at the end of converter smelting is controlled at 1660℃, and must not be lower than 1650℃. To control the production of high-melting-point calcium aluminate, this invention uses ferrosilicon alloy and high-carbon ferromanganese alloy to replace aluminum-manganese-calcium alloy, so as to form SiO2-MnO deoxidation products. At the same time, the free oxygen content in the steel is controlled within the range of 0.0040%-0.0100%. The specific process is as follows:

[0009] Step 1.1: Based on the steel output and oxygen content of the molten steel, add a measured amount of ferrosilicon alloy, controlling the silicon content of the molten steel within the range of 0.30%-0.45%. At this point, some silicon acts as a deoxidizer, removing free oxygen from the molten steel and forming the deoxidation product SiO2.

[0010] Step 1.2: Based on the steel output and oxygen content of the molten steel, a measured amount of high-carbon ferromanganese alloy is added, controlling the manganese content in the molten steel within the range of 0.35%-0.55%. At this point, some of the manganese acts as a deoxidizer, further removing free oxygen from the molten steel and forming the deoxidation product MnO. This MnO reacts with the aforementioned deoxidation product SiO2 to form a SiO2-MnO deoxidation product system.

[0011] Step 1.3: Based on the steel output and the phosphorus content of the molten steel, add a certain amount of ferrophosphorus alloy, and control the phosphorus content of the molten steel within the range of 0.07%-0.12%.

[0012] Step 1.4: Based on the amount of steel produced, add a certain amount of medium-carbon ferrochrome alloy, and control the chromium content of the molten steel within the range of 0.3%-0.5%.

[0013] Step 2: Control of ladle top slag composition before argon entry. To reduce oxygen transfer from ladle top slag to molten steel during the production of Ti-containing corrosion-resistant steel, this invention involves creating high-basicity, low-oxidation ladle slag during converter tapping. During tapping, 800 kg of desulfurized lime is added to the molten steel in the ladle, ensuring the ladle top slag basicity is not lower than 4. After tapping, 300 kg of ladle slag modifier is added to the surface of the ladle top slag, ensuring the FeO and MnO content of the ladle top slag does not exceed 5%.

[0014] Step 3: Control of non-metallic inclusions during argon station refining. Al alloy is added through a wire feeding process to remove free oxygen from the molten steel. This promotes the flotation and removal of deoxidation products during converter tapping. The invention employs a bottom-blowing argon process throughout the entire process. During the argon-blowing refining process, an appropriate amount of deoxidizing agent aluminum alloy is added by feeding aluminum wire, based on the weight of the molten steel and the free oxygen content in the steel entering the argon station. The Al content in the molten steel is controlled within the range of 0.010%-0.020%, and the free oxygen content is controlled below 0.0010%. The Al deoxidation product Al2O3 forms a low-melting-point Al2O3-SiO2-MnO system with the aforementioned SiO2-MnO deoxidation products.

[0015] Step 4: Add Ti alloy via wire feeding. Add an appropriate amount of titanium wire according to the weight of the molten steel, controlling the Ti content in the molten steel within the range of 0.02%-0.04%. To prevent the free oxygen in the molten steel from reacting with Ti to form TiO2, this invention involves strong stirring for 2 minutes after adding the aluminum alloy, controlling the free oxygen content in the molten steel to below 0.0010%. To prevent the oxidation of Ti by top slag oxides (FeO and MnO) to form TiO2, this invention involves switching the ladle bottom-blowing argon mode to a weak stirring state and adding the Ti alloy using a wire feeding process. Before the slag layer completely melts and the iron scale on the surface of the Ti wire is reached, the Ti wire is directly added into the molten steel, preventing the slag layer from contacting the Ti alloy and thus preventing the slag layer from oxidizing the Ti alloy.

[0016] Step 5: Control of non-metallic inclusions before argon exit from the argon station. A small volume of argon gas is blown from the bottom of the ladle to weakly stir the molten steel, ensuring no exposed molten steel appears in the top slag. This process removes non-metallic inclusions from the molten steel to the greatest extent possible, guaranteeing that the total oxygen content is less than 0.0020%.

[0017] Step 6: Control of non-metallic inclusions during casting. The long nozzle and submerged entry nozzle of the ladle are protected by argon sealing to prevent contact between the molten steel and air during casting, ensuring that the total oxygen content of the molten steel is less than 0.0023%.

[0018] Compared with existing smelting processes, the present invention has the following advantages: (1) The scheme shortens the production process and reduces the LF refining process, which can effectively reduce process energy consumption and carbon emissions. At the same time, it reduces production costs, and can reduce the cost per ton of steel by 40 yuan; (2) The scheme controls non-metallic inclusions through Si-Mn-Al composite deoxidation technology, improves the castability of molten steel, stabilizes the fluctuation of the crystallizer liquid level during the casting process, reduces the chance of slag entrapment in the crystallizer, and ultimately improves the cleanliness of molten steel. Attached Figure Description

[0019] Figure 1 These are the stopper rod curve and crystallizer liquid level fluctuation curve under the original production process conditions.

[0020] Figure 2These are the stopper rod curve and the crystallizer liquid level fluctuation curve under the production process conditions of this invention. Detailed Implementation

[0021] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0022] Example 1:

[0023] A method for producing Ti-containing corrosion-resistant steel using a direct argon blowing process includes the following steps:

[0024] Step 1: The temperature of the molten steel tapped from the converter is 1674℃, the oxygen content is 0.0553%, and the quantity of molten steel is 277t. Ferrosilicon and high-carbon ferromanganese are used as deoxidizers during the tapping process. After deoxidation, the free oxygen content in the steel is 0.0064%. The deoxidation and alloying process during the converter tapping process involves:

[0025] Step 1.1: Based on the above steel output and oxygen content in the molten steel, add 1518 kg of ferrosilicon alloy, resulting in a silicon content of 0.30% in the molten steel. At this point, some of the silicon acts as a deoxidizer, removing free oxygen from the molten steel and forming the deoxidation product SiO2.

[0026] Step 1.2: Based on the above steel output and oxygen content in the molten steel, add 1320 kg of high-carbon ferromanganese alloy, resulting in a manganese content of 0.43% in the molten steel. At this point, some of the manganese acts as a deoxidizer, further removing free oxygen from the molten steel and forming the deoxidation product MnO. This MnO reacts with the aforementioned deoxidation product SiO2 to form a SiO2-MnO deoxidation product system.

[0027] Step 1.3: Based on the above steel output and the 0.035% phosphorus content of the molten steel, add 195 kg of ferrophosphorus alloy, so that the phosphorus content of the molten steel is 0.083%.

[0028] Step 1.4: Based on the above steel output, add 1549 kg of medium carbon ferrochrome alloy, with a chromium content of 0.33% in the molten steel.

[0029] Step 2: During the tapping process, 820 kg of desulfurized lime is added to the molten steel in the ladle. After tapping, 301 kg of ladle slag modification accelerator is added to the surface of the top slag of the ladle.

[0030] Step 3: Based on the above-mentioned molten steel weight and the free oxygen in the steel entering the argon station, add 181.83 kg of aluminum alloy by feeding aluminum wire. The Al content of the molten steel is 0.023%, and the free oxygen content of the molten steel is 0.00056%.

[0031] Step 4: Add 94.2 kg of titanium wire according to the above-mentioned weight of molten steel, making the Ti content of the molten steel 0.021%. The free oxygen content of the molten steel before the addition of the titanium alloy is 0.00056%.

[0032] Step 5: The molten steel is gently stirred by bottom blowing 60 NL / min of argon gas into the ladle. No exposed molten steel should appear in the top slag. After the treatment, the total oxygen content of the molten steel is 0.0018%.

[0033] Step 6: The long nozzle and submerged nozzle of the ladle are protected by argon sealing process during casting to prevent the molten steel from coming into contact with air during the casting process and to ensure that the total oxygen content of the molten steel is less than 0.0020%.

[0034] Example 2:

[0035] A method for producing Ti-containing corrosion-resistant steel using a direct argon blowing process includes the following steps:

[0036] Step 1: The temperature of the molten steel tapped from the converter is 1658℃, the oxygen content is 0.0837%, and the quantity of molten steel is 277t. Ferrosilicon and high-carbon ferromanganese are used as deoxidizers during the tapping process. After deoxidation, the free oxygen content in the steel is 0.0061%. The deoxidation and alloying process during the converter tapping process involves:

[0037] Step 1.1: Based on the above steel output and oxygen content in the molten steel, add 1712 kg of ferrosilicon alloy, resulting in a silicon content of 0.32% in the molten steel. At this point, some of the silicon acts as a deoxidizer, removing free oxygen from the molten steel and forming the deoxidation product SiO2.

[0038] Step 1.2: Based on the above-mentioned steel output and oxygen content in the molten steel, 1418 kg of high-carbon ferromanganese alloy is added, resulting in a manganese content of 0.42% in the molten steel. At this point, some of the manganese acts as a deoxidizer, further removing free oxygen from the molten steel and forming the deoxidation product MnO. This MnO reacts with the aforementioned deoxidation product SiO2 to form a SiO2-MnO deoxidation product system.

[0039] Step 1.3: Based on the above steel output and the 0.017% phosphorus content of the molten steel, add 345 kg of ferrophosphorus alloy, so that the phosphorus content of the molten steel is 0.076%.

[0040] Step 1.4: Based on the above steel output, add 1578 kg of medium carbon ferrochrome alloy, with a chromium content of 0.34% in the molten steel.

[0041] Step 2: During the tapping process, 810 kg of desulfurized lime is added to the molten steel in the ladle. After tapping, 300 kg of ladle slag modification accelerator is added to the surface of the top slag of the ladle.

[0042] Step 3: Based on the above-mentioned molten steel weight and the free oxygen in the steel entering the argon station, add 148.5 kg of aluminum alloy by feeding aluminum wire. The Al content of the molten steel is 0.017%, and the free oxygen content of the molten steel is 0.00067%.

[0043] Step 4: Add 105 kg of titanium wire according to the above-mentioned weight of molten steel. The Ti content of the molten steel is 0.024%. The free oxygen content of the molten steel before the addition of the titanium alloy is 0.00067%.

[0044] Step 5: The molten steel is gently stirred by bottom blowing 60 NL / min of argon gas into the ladle. No exposed molten steel should appear in the top slag. After the treatment, the total oxygen content of the molten steel is 0.0020%.

[0045] Step 6: The long nozzle and submerged nozzle of the ladle are protected by argon sealing process to prevent the molten steel from contacting air during the pouring process. The total oxygen content of the molten steel in the tundish is 0.0022%.

[0046] Comparative Example

[0047] The comparative example is the original process, which uses a converter-argon station-LF furnace-continuous casting to produce titanium-containing corrosion-resistant steel. The difference between this invention and the present invention is:

[0048] Step 1: The temperature of the molten steel tapped from the converter is 1620℃, the oxygen content is 0.0265%, and the quantity of molten steel is 278t. An aluminum-manganese-calcium alloy is used as a deoxidizer during the tapping process. After deoxidation, the free oxygen content in the steel is 0.0002%. The deoxidation alloying process during the converter tapping process involves:

[0049] Step 1.1: Based on the above steel output and oxygen content in the molten steel, add 565 kg of aluminum-manganese-calcium alloy. The acid-soluble aluminum content in the molten steel is 0.038%. At this point, the deoxidation product in the steel is high-melting-point, easily nodulated Al2O3. After deoxidation, the free oxygen content in the steel is 0.0002%.

[0050] Step 1.2: Based on the above steel output, add 658 kg of high-carbon ferromanganese alloy, resulting in a manganese content of 0.32% in the molten steel. At this point, since manganese has a weaker reducing power than aluminum, the high-carbon ferromanganese alloy only adjusts the alloy element composition of the molten steel and does not act as a deoxidizer.

[0051] Step 1.3: Based on the above steel output, add 1015 kg of ferrosilicon, resulting in a silicon content of 0.23% in the molten steel. Again, since silicon's reducing power is weaker than aluminum's, the ferrosilicon only adjusts the alloy element composition of the molten steel and does not act as a deoxidizer.

[0052] Step 1.3: Based on the above steel output and the 0.051% phosphorus content of the molten steel, add 195 kg of ferrophosphorus alloy, so that the phosphorus content of the molten steel is 0.058%.

[0053] Step 1.4: Based on the above steel output, add 1309 kg of medium carbon ferrochrome alloy, with a chromium content of 0.27% in the molten steel.

[0054] Step 2: During the tapping process, 1013 kg of desulfurization lime is added to the molten steel in the ladle. After tapping, 513 kg of ladle slag modifier is added to the surface of the top slag of the ladle.

[0055] Step 3: After temperature measurement and sampling at the argon station, the ladle is transported to the LF furnace processing station for electrode heating and slag removal. Based on the weight and composition of the molten steel, 331 kg of ferrosilicon is added, with a silicon content of 0.34%; 339 kg of medium-carbon ferromanganese is added, with a manganese content of 0.45%; 274 kg of medium-carbon ferrochrome is added, with a chromium content of 0.34%; and 242 kg of ferrophosphorus is added, with a phosphorus content of 0.081%.

[0056] Step 4: Add 163 kg of 70 titanium-iron alloy according to the above-mentioned weight of molten steel. The Ti content of the molten steel is 0.035%. The free oxygen content of the molten steel before the addition of the titanium alloy is 0.0002%.

[0057] Step 5: After the titanium alloy is added, the molten steel is gently stirred by bottom blowing 60 NL / min of argon gas in the ladle. No exposed molten steel should appear in the top slag. After the treatment, the total oxygen content of the molten steel is 0.0024%.

[0058] Step 6: The long nozzle and submerged nozzle of the steel ladle are protected by argon sealing process to prevent the molten steel from contacting air during the pouring process. The total oxygen content of the molten steel in the tundish is 0.0025%.

[0059] Compared to the comparative example, firstly, the titanium wire alloy yield in Example 1 was 88.2%, and in Example 2 it was 90.4%. In the comparative example, the yield of 70 titanium-iron alloy was 79.9%. This indicates that some titanium was oxidized by the top slag into high-melting-point TiO2 non-metallic inclusions. Secondly, the non-metallic inclusions in the molten steel in the examples were low-melting-point compounds of SiO2-MnO-Al2O3, while the non-metallic inclusions in the molten steel in the comparative example were Al2O3 and TiO2 oxidized by the top slag. Finally, the examples only used an argon station refining process, while the comparative example required an LF furnace refining process.

[0060] at the same time, Figure 1 and Figure 2 The crystallizer level fluctuations of the original process and the present invention are presented. As shown in the figure, after implementing the present invention, the crystallizer level fluctuations are effectively improved due to the effective control of high-melting-point Al2O3 inclusions and TiO2 inclusions.

[0061] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. A smelting process for producing titanium-containing corrosion-resistant steel using argon blowing refining, characterized in that, The method includes the following steps: Step 1: Control of non-metallic inclusions during converter tapping. The target temperature of molten steel at the end of converter smelting shall not be lower than 1650℃. Ferrosilicon alloy and high-carbon ferromanganese alloy shall be used to replace aluminum-manganese-calcium alloy to form SiO2-MnO deoxidation products. At the same time, the free oxygen content in the steel shall be controlled within the range of 0.0040%-0.0100%. Step 2: Control the composition of ladle top slag before entering the argon station. During the converter tapping process, generate high-basicity, low-oxidizing ladle slag. After tapping, the FeO and MnO content of the ladle top slag should not exceed 5%. Step 3: Control of non-metallic inclusions in the argon station refining process. Al alloy is added through wire feeding to remove free oxygen in the molten steel, promoting the flotation and removal of deoxidation products during the converter tapping process. During the argon blowing refining process, according to the weight of the molten steel and the free oxygen content in the steel entering the argon station, an appropriate amount of deoxidizing agent aluminum alloy is added by feeding aluminum wire to control the Al content in the molten steel within the range of 0.010%-0.020%, and the free oxygen content in the molten steel below 0.0010%. Step 4: Add Ti alloy through wire feeding process, and add an appropriate amount of titanium wire according to the weight of molten steel to control the Ti content of molten steel within the range of 0.02%-0.04%; Step 5: Control of non-metallic inclusions before argon exit from the argon station; use a small amount of argon gas blown from the bottom of the ladle to weakly stir the molten steel. Step 6: Control of non-metallic inclusions during the casting process. Protective casting is achieved by using a long ladle nozzle and an immersion nozzle argon sealing process to prevent molten steel from coming into contact with air during the casting process.

2. The argon-blown refining process for producing titanium-containing corrosion-resistant steel according to claim 1, characterized in that, In step 1, the target temperature of the molten steel at the end of the converter smelting process is controlled at 1660℃. The specific process is as follows: Step 1.1: Based on the steel output and oxygen content of the molten steel, a certain amount of ferrosilicon alloy is added to control the silicon content of the molten steel within the range of 0.30%-0.45%. At this point, some silicon acts as a deoxidizer, removing free oxygen from the molten steel and forming the deoxidation product SiO2. Step 1.2: Based on the steel output and oxygen content of the molten steel, a measured amount of high-carbon ferromanganese alloy is added to control the manganese content of the molten steel within the range of 0.35%-0.55%. At this point, some of the manganese acts as a deoxidizer, further removing free oxygen from the molten steel and forming the deoxidation product MnO. This MnO reacts with the aforementioned deoxidation product SiO2 to form the SiO2-MnO deoxidation product system. Step 1.3: Based on the steel output and phosphorus content of the molten steel, add a measured amount of ferrophosphorus alloy to control the phosphorus content of the molten steel within the range of 0.07%-0.12%. Step 1.4: Based on the amount of steel produced, add a certain amount of medium-carbon ferrochrome alloy to control the chromium content of the molten steel within the range of 0.3%-0.5%.

3. The argon-blown refining process for producing titanium-containing corrosion-resistant steel according to claim 2, characterized in that, In step 2, during the tapping process, 800 kg of desulfurized lime is added to the molten steel in the ladle, and the basicity of the ladle top slag is not less than 4. After tapping, 300 kg of ladle slag modification accelerator is added to the surface of the ladle top slag.

4. The argon-blown refining process for producing titanium-containing corrosion-resistant steel according to claim 3, characterized in that, In step 3, the entire process uses bottom-blowing argon process in a steel ladle. After the aluminum alloy is added, it is strongly stirred for 2 minutes. The Al deoxidation product Al2O3 and the SiO2-MnO deoxidation product form a low-melting-point Al2O3-SiO2-MnO.

5. The argon-blown refining process for producing titanium-containing corrosion-resistant steel according to claim 3 or 4, characterized in that, In step 4, to prevent the top slag oxides FeO and MnO from oxidizing Ti elements to form TiO2, the bottom blowing argon mode of the ladle is switched to a weak stirring state, and Ti alloy is added using a wire feeding process. Before the slag layer completely melts the iron sheet on the surface of the Ti wire, the Ti wire is directly added into the molten steel, preventing the slag layer from contacting the Ti alloy, thereby preventing the slag layer from oxidizing the Ti alloy.

6. The argon-blown refining process for producing titanium-containing corrosion-resistant steel according to claim 5, characterized in that, In step 5, no exposed molten steel should appear in the top slag. Non-metallic inclusions in the molten steel should be removed to the greatest extent possible, and the total oxygen content of the molten steel should be less than 0.0020%.

7. The argon-blown refining process for producing titanium-containing corrosion-resistant steel according to claim 6, characterized in that, In step 6, ensure that the total oxygen content in the molten steel is less than 0.0023%.

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