CN111455135A - Pretreatment-free method for discontinuously producing bearing steel RH vacuum tank - Google Patents
Pretreatment-free method for discontinuously producing bearing steel RH vacuum tank Download PDFInfo
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- CN111455135A CN111455135A CN202010256983.0A CN202010256983A CN111455135A CN 111455135 A CN111455135 A CN 111455135A CN 202010256983 A CN202010256983 A CN 202010256983A CN 111455135 A CN111455135 A CN 111455135A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 47
- 239000010959 steel Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000007670 refining Methods 0.000 claims abstract description 42
- 238000007664 blowing Methods 0.000 claims abstract description 12
- 238000007872 degassing Methods 0.000 claims abstract description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 16
- 229910052782 aluminium Inorganic materials 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 12
- 229910052786 argon Inorganic materials 0.000 claims description 9
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 2
- 240000007594 Oryza sativa Species 0.000 claims description 2
- 235000007164 Oryza sativa Nutrition 0.000 claims description 2
- 235000009566 rice Nutrition 0.000 claims description 2
- 229910000720 Silicomanganese Inorganic materials 0.000 claims 1
- 238000009749 continuous casting Methods 0.000 abstract description 17
- 238000005266 casting Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 229910052710 silicon Inorganic materials 0.000 abstract description 4
- 238000009489 vacuum treatment Methods 0.000 abstract description 3
- 229910052804 chromium Inorganic materials 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000616 Ferromanganese Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- FXNGWBDIVIGISM-UHFFFAOYSA-N methylidynechromium Chemical group [Cr]#[C] FXNGWBDIVIGISM-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000011814 protection agent Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0025—Adding carbon material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a pretreatment-free method for an RH vacuum tank for discontinuously producing bearing steel, which is characterized in that molten steel is not required to be degassed and heated in an RH process during the discontinuous production of the bearing steel, and the molten steel of the bearing steel after refining is subjected to RH vacuum treatment and soft blowing and then is hung to continuous casting for casting. The refining ladle components of the first furnace and the second furnace are poured according to the proportion of C: 0.97-1.0%, Si: 0.25-0.30%, Mn: 0.33-0.38%, Cr: 1.48-1.5%, Als: 0.025-0.035%, and the refining ladle temperature is 1595-1610 ℃; the RH degassing time is more than or equal to 40min, the RH high vacuum time is more than 20min, the concentration of CO tail gas is less than or equal to 10%, and the soft blowing time is more than 30min, so that the refining time of the bearing steel is shortened, the corrosion of a steel ladle is reduced, the probability of the steel ladle not opening by oneself is reduced, the waiting time of continuous casting and casting is shortened, and the purity and the components of the bearing steel are ensured.
Description
Technical Field
The invention relates to the field of bearing steel smelting in the ferrous metallurgy industry, in particular to a pretreatment-free method for an RH vacuum tank for discontinuously producing bearing steel, which can shorten the refining time of pretreating molten steel by a casting furnace, reduce ladle corrosion, reduce the probability of non-self-opening of a ladle, shorten the continuous casting waiting time and ensure the purity and the components of the molten steel.
Background
the high carbon chromium bearing steel is commonly used for manufacturing parts such as balls, rollers, bearing rings, wind power bearings and the like, and along with the breakthrough and development of smelting technology, higher requirements on the service life, stability, reliability and the like of the bearings are provided, for discontinuous production, when the bearing steel of the BOF-L F-RH-CCM process flow is produced, 1-2 furnaces of other steel types are required to perform degassing and heating pretreatment (namely dehydrogenation, deoxidation and heating pretreatment after L F refining procedure) on RH so as to ensure the purity and components of the bearing steel, but the problems that the RH degassing and heating pretreatment is performed on the bearing steel water sometimes occurs due to production plan arrangement, the continuous casting is performed on the molten steel after the RH treatment and re-deoxidation and soft blowing are performed on the molten steel are solved, the refining time of the pretreated molten steel is prolonged, the probability of large-particle non-metallic inclusions caused by ladle corrosion is increased, the automatic flow of a water gap is easily caused, and the waiting time for continuous casting is prolonged.
Disclosure of Invention
The invention aims at solving the problems in the prior art, provides technical improvement aiming at the situation that the vacuum tank of the RH process is in a cold state during discontinuous production, and provides a pretreatment-free method for the RH vacuum tank of the bearing steel during discontinuous production. The method not only ensures the requirements of molten steel quality, finished product components, gas content and the like, but also shortens the refining time of the casting furnace, reduces the probability of non-self-opening of the ladle and optimizes the production organization.
In order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows:
A pretreatment-free method for an RH vacuum tank for discontinuously producing bearing steel comprises L F refining procedures and RH refining procedures, wherein L F refining procedures comprise L F treatment procedures, and the RH procedures comprise RH treatment procedures.
the L F processing process comprises the steps of refining the L F refined primary furnace and the secondary furnace, wherein the ladle comprises the components of 0.97-1.0% of C, 0.25-0.30% of Si, 0.33-0.38% of Mn, 1.48-1.5% of Cr and 0.025-0.035% of Als, the temperature of the ladle is controlled to be 1595-1610 ℃, and the refining time of L F is less than or equal to 60 minutes;
The RH treatment process comprises the following steps: the vacuum degree is less than 67Pa, the lifting gas adopts Ar gas, and the flow is more than or equal to 75Nm 3And h, degassing for more than or equal to 40min, high-vacuum circulation time for more than 20min, CO tail gas concentration for less than or equal to 10%, oxygen content for less than 6ppm after the circulation time is finished, adding carbonized rice hulls into the steel to perform soft blowing, and performing soft blowing for more than 30 min.
preferably, L F the method for controlling the refining ladle components of the first furnace and the second furnace after refining comprises the following steps of adding lime 400-500 kg/furnace in batches after refined molten steel enters the station, determining whether aluminum wires and aluminum wire amount need to be added after entering the station or not according to the content of Als analyzed by the sample of the argon station (less than or equal to 0.040%) or controlling Als as early as possible) according to the situation of aluminum in the sample of the argon station (aluminum blocks and alloys are added when the converter is placed, and the molten steel stays in the argon station for sampling after steel placement, analyzing the components, adding aluminum after entering the station, and keeping the content of Als at a target of 0.050 +/-0.020% (here, aluminum control is mainly used for controlling aluminum oxide in the molten steel to be generated in the early stage of refining and aluminum oxide to easily float up), under the situation that the content of Als can guarantee that aluminum particles and aluminum wires are forbidden to be used when the content of Als is guaranteed, and when the first component is added, the content of Als is less than or equal to 0.020%, continuously adjusting the content of Als in the target of 0.010% by continuously stirring and refining, and the content of aluminum oxide is difficult to adjust the molten steel in the continuous casting, and the molten steel after the continuous casting, thus the continuous casting process of molten steel is difficult to adjust the high-silicon carbide slag and the high-silicon carbide slag is difficult to obtain the continuous casting.
Preferably, the first sample is electrified for 7-9 min, and the second sample is electrified for 15-25 min.
Compared with the prior art, the invention has the following beneficial effects: controlling the Als content in molten steel in the early stage of refining, deoxidizing by using silicon carbide in the refining process, improving the tapping components of a first furnace and a second furnace by refining, and particularly ensuring that the components of finished products are qualified by carbon, silicon and Als easily-oxidizable elements; in the RH treatment process, degassing time and high vacuum circulation time are prolonged, and CO tail gas concentration is concerned, so that the oxygen content in steel is less than 6ppm after circulation is finished. The refining time of molten steel for casting pretreatment is shortened, ladle corrosion is reduced, the probability of non-self-opening of the ladle is reduced, and the casting time of continuous casting is shortened.
In the invention, in the discontinuous production, the RH procedure does not arrange the degassing and heating pretreatment of the molten steel, but the bearing molten steel is hung to the continuous casting for casting after RH vacuum treatment and soft blowing. Prolonging the vacuum treatment time, wherein the degassing time is more than or equal to 40min, the high vacuum time is more than 20min, the concentration of CO tail gas is less than or equal to 10 percent, and the refining ladle components of the first furnace and the second furnace are poured according to the proportion of C: 0.97-1.0%, Si: 0.25-0.30%, Mn: 0.33-0.38%, Cr:
1.48-1.5%, Als: 0.025-0.035%, the refining ladle temperature is 1595-1610 ℃, and the soft blowing time is more than 30min, thereby reducing the refining time of the pre-treated molten steel for casting, reducing the ladle erosion, increasing the average service life of the ladle from 75.4 times to 78.6 times, reducing the ladle erosion, reducing the ladle non-self-opening probability, increasing the ladle self-flow rate from 94.8% to 98.8%, reducing the casting time for continuous casting, reducing the average downtime of the continuous casting from 245min to 180min, reducing the casting waiting time for continuous casting, and simultaneously meeting various requirements of bearing steel.
Detailed Description
The invention is described in more detail below with reference to the following examples:
The present invention will be described in further detail with reference to specific examples.
The converter treatment process comprises the following steps: the ingredients after KR treatment of the molten iron are as follows: c: 4.2-4.5%, Si: 0.50 to 0.64%, Mn: 0.200-0.273%, P: 0.110-0.128%, S: 0.001-0.002% of molten iron temperature, 1373-1381 ℃; converter end point component C: 0.08-0.12%, P: 0.014 to 0.016%, S: 0.006-0.007%, the end point temperature of 1603-1610 ℃, 30kg of deoxidizer aluminum cake, 2310-2322 kg of alloy low-titanium high-carbon ferrochrome, 258-265 kg of high-carbon ferromanganese, 194-212 kg of ferrosilicon, 398-402 kg of slag charge lime, 995-1050 kg of furnace protection agent and 890-910 kg of low-nitrogen carburant balls are added when 1/4 of converter tapping is carried out, and the main components of each alloy and slag making material are shown in Table 1.
TABLE 1 alloy and slag-forming charge principal Components
L F, in the treatment process, the content of Als in an argon station is 0.030-0.040%, an aluminum wire is fed in a supplementing mode at 50-150 m (the diameter of the aluminum wire is 10mm), the same content of Als in the refining process is 0.035-0.045% after 7-9 min of electrification, lime in the refining process is supplemented in a supplementing mode at 450-500 kg, silicon carbide serving as a deoxidizer is 200-260 kg, the electrifying and heating time is 30-40 min, the refining time is 45-58 min, the control of argon blowing at the bottom in the refining process is shown in a table 2, the components of a first furnace and a second furnace out of the refining station are shown in a table 3, the furnace 3 starts to be controlled according to the inner control.
TABLE 2 refining Process bottom blowing argon control requirements
TABLE 3 refining of off-site Components (mass fraction/%)
| Heat of furnace | C | Si | Mn | P | S | Cr | Ni | Cu | Als | Ti |
| First furnace | 0.989 | 0.26 | 0.368 | 0.016 | 0.004 | 1.48 | 0.011 | 0.081 | 0.028 | 0.0016 |
| Second furnace | 0.975 | 0.28 | 0.353 | 0.013 | 0.004 | 1.48 | 0.016 | 0.093 | 0.032 | 0.0013 |
RH refining process: RH degassing time is 40-45 min, high vacuum circulation time is 22-25 min, ultimate vacuum degree is 7-13 Pa, and airflow rate is increased by 75Nm 3The concentration of CO tail gas is 7.5-8.8%, and the oxygen content after the circulation time is over: 3-4.2 ppm, and the soft blowing time is 32-35 min.
the continuous casting process comprises the continuous casting shutdown time of 150-190 min, wherein the continuous casting tundish material is made of magnesium coating, argon seal protection pouring is used in the pouring process, the ladle is started to completely flow automatically, the secondary cooling specific water quantity is 0.25L/kg, the pulling speed is 0.75m/min, the superheat degree is 30-35 ℃, the electromagnetic stirring parameters of the crystallizer are 300A and 2.5Hz, and the electromagnetic stirring parameters of the tail end are 300A and 6 Hz.
The components of the bearing steel product obtained in the embodiment and the inclusion detection rolling gas of the wire rod (according to GB/T18254-2016) are shown in tables 4-5.
TABLE 4 bearing Steel product composition (mass fraction/%)
| Heat of furnace | C | Si | Mn | P | S | Cr | Ni | Cu | Als | Ti |
| First furnace | 0.969 | 0.23 | 0.35 | 0.015 | 0.004 | 1.45 | 0.010 | 0.080 | 0.022 | 0.0018 |
| Second furnace | 0.957 | 0.24 | 0.35 | 0.013 | 0.003 | 1.48 | 0.015 | 0.092 | 0.027 | 0.0014 |
TABLE 5 rolled stock gas and inclusions detection
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and their concepts should be equivalent or changed within the technical scope of the present invention.
Claims (3)
1. A pretreatment-free method for an RH vacuum groove for discontinuously producing bearing steel is characterized by comprising L F refining procedures and RH refining procedures, wherein L F refining procedures comprise L F treatment procedures, and the RH procedures comprise RH treatment procedures;
the L F processing process comprises the steps of refining the L F refined primary furnace and the secondary furnace, wherein the ladle comprises the components of 0.97-1.0% of C, 0.25-0.30% of Si, 0.33-0.38% of Mn, 1.48-1.5% of Cr and 0.025-0.035% of Als, the temperature of the ladle is controlled to be 1595-1610 ℃, and the refining time of L F is less than or equal to 60 minutes;
The RH treatment process comprises the following steps: the vacuum degree is less than 67Pa, the lifting gas adopts Ar gas, and the flow is more than or equal to 75Nm 3And h, degassing for more than or equal to 40min, high-vacuum circulation time for more than 20min, CO tail gas concentration for less than or equal to 10%, oxygen content for less than 6ppm after the circulation time is finished, adding carbonized rice hulls into the steel to perform soft blowing, and performing soft blowing for more than 30 min.
2. the pretreatment-free method for the RH vacuum tank for discontinuously producing bearing steel according to claim 1, wherein the L F refining post-cast first furnace and second furnace refining ladle component control method comprises the following steps of adding lime 400-500 kg/furnace in batches after refining molten steel enters a station, adding aluminum after entering the station according to the condition of converter argon station sample Als, wherein the aim of the content of Als is 0.050 +/-0.010%, aluminum particles and aluminum wires are forbidden under the condition that the content of Als can be ensured, if the Als is less than or equal to 0.020% after the first sample component comes out, continuously adding and feeding the aluminum wires to adjust the position at one time, the aim of adjusting the content of Als is 0.040 +/-0.010%, adjusting the content of Als again after taking the second sample, stirring and reducing aluminum by using large argon when the content of Als is high, refining uses silicon carbide for deoxidation, and refining uses ferrosilicon, silicomanganese and high-carbon ferrochrome for adjustment.
3. The pretreatment-free method for the RH vacuum grooves for discontinuously producing bearing steel according to claim 2, wherein the pretreatment-free method comprises the following steps: and after the first sample is electrified for 7-9 min, the second sample is electrified for 15-25 min.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114182062A (en) * | 2021-12-08 | 2022-03-15 | 武汉钢铁有限公司 | Method for accurately controlling Als content of high-magnetic-induction oriented silicon steel plate blank |
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| JP2001342512A (en) * | 2000-06-05 | 2001-12-14 | Sanyo Special Steel Co Ltd | Highly clean steel and production method |
| JP2006200027A (en) * | 2005-01-24 | 2006-08-03 | Nippon Steel Corp | High-carbon chromium steel for bearing and production method therefor |
| CN105463150A (en) * | 2015-12-18 | 2016-04-06 | 中天钢铁集团有限公司 | Steel smelting process used for automobile hub bearing |
| CN106591536A (en) * | 2016-12-20 | 2017-04-26 | 中天钢铁集团有限公司 | Production process for high-purity bearing steel |
| CN109055664A (en) * | 2018-10-08 | 2018-12-21 | 中天钢铁集团有限公司 | A kind of bearing steel molten steel deoxidation control method of no Ds type impurity |
| CN110846581A (en) * | 2019-12-05 | 2020-02-28 | 中天钢铁集团有限公司 | Smelting method for realizing ultrahigh purity of bearing steel by controlling alkalinity of furnace slag and combining electromagnetic stirring of tundish |
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| CN114182062A (en) * | 2021-12-08 | 2022-03-15 | 武汉钢铁有限公司 | Method for accurately controlling Als content of high-magnetic-induction oriented silicon steel plate blank |
| CN114182062B (en) * | 2021-12-08 | 2022-12-13 | 武汉钢铁有限公司 | Method for accurately controlling Als content of high-magnetic-induction oriented silicon steel plate blank |
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