CN114959162A - Smelting method of HIC (hydrogen induced cracking) resistant pressure vessel steel SA516Gr60N - Google Patents
Smelting method of HIC (hydrogen induced cracking) resistant pressure vessel steel SA516Gr60N Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 52
- 239000010959 steel Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000003723 Smelting Methods 0.000 title claims abstract description 32
- 229910052739 hydrogen Inorganic materials 0.000 title abstract description 14
- 239000001257 hydrogen Substances 0.000 title abstract description 14
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title abstract description 13
- 238000005336 cracking Methods 0.000 title abstract description 5
- 239000002893 slag Substances 0.000 claims abstract description 49
- 238000005266 casting Methods 0.000 claims abstract description 40
- 238000009749 continuous casting Methods 0.000 claims abstract description 31
- 238000007670 refining Methods 0.000 claims abstract description 22
- 238000010079 rubber tapping Methods 0.000 claims abstract description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 20
- 239000001301 oxygen Substances 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 15
- 230000009467 reduction Effects 0.000 claims abstract description 13
- 208000004434 Calcinosis Diseases 0.000 claims abstract description 11
- 230000002308 calcification Effects 0.000 claims abstract description 11
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011574 phosphorus Substances 0.000 claims abstract description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 18
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 18
- 239000004571 lime Substances 0.000 claims description 18
- 238000005516 engineering process Methods 0.000 claims description 13
- 238000005204 segregation Methods 0.000 claims description 9
- 238000005275 alloying Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
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- 238000009826 distribution Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 4
- CSJDCSCTVDEHRN-UHFFFAOYSA-N methane;molecular oxygen Chemical compound C.O=O CSJDCSCTVDEHRN-UHFFFAOYSA-N 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 238000005070 sampling Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
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- 229910052717 sulfur Inorganic materials 0.000 abstract description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 239000011593 sulfur Substances 0.000 abstract description 3
- 238000009849 vacuum degassing Methods 0.000 abstract description 3
- 150000002431 hydrogen Chemical class 0.000 abstract 1
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
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- 230000002378 acidificating effect Effects 0.000 description 1
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- 230000035945 sensitivity Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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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
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
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- C—CHEMISTRY; METALLURGY
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- 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
- C21C5/36—Processes yielding slags of special composition
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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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
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- C—CHEMISTRY; METALLURGY
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- 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
- C21C7/064—Dephosphorising; Desulfurising
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- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
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- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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Abstract
The invention discloses a smelting method of HIC-resistant pressure vessel steel SA516Gr60N, which comprises the following specific steps of converter smelting, tapping and slagging, LF refining, calcification treatment, VD vacuum refining, continuous casting and casting blank stacking and cooling: step one, a converter smelting process; step two, a refining furnace smelting process; and step three, a continuous casting process. The invention optimizes a converter slagging system, refines in an LF furnace to produce oxidation slag for dephosphorization, produce reduction slag for deoxidation and desulfurization, VD vacuum degassing and impurity removal process, and continuously casts with low superheat degree and full-process protection, so that the components of a casting blank are uniform, phosphorus is less than or equal to 0.008 percent, sulfur is less than or equal to 0.0015 percent, oxygen (O) is less than or equal to 15ppm, hydrogen (H) is less than or equal to 1.5ppm, non-metallic impurities are effectively controlled, the internal quality of the casting blank is good, and the production of the hydrogen induced cracking resistant steel with high added value is ensured.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and relates to a smelting control method of HIC (hydrogen induced cracking) resistant pressure vessel steel SA516Gr 60N.
Background
The mechanism of hydrogen induced cracking resistance has been studied by the predecessors, mainly focusing on two points: controlling impurities and material uniformity in the steel. For the hydrogen-induced crack resistant container steel, alloys such as Nb, V and B are forbidden to be intentionally added, the product strength can be ensured only by increasing the C, Mn content, C, Mn is an element easy to segregate, segregation is an important factor influencing the quality of a casting blank in the continuous casting process, and loose and thin inclusions caused by segregation are more likely to become crack sources. In an acidic environment, the more inclusions in the steel, the higher the HIC sensitivity of the steel.
The quality of a casting blank is improved by improving the metallurgical process, the segregation and inclusion content are reduced, and the HIC resistance of the steel can be effectively improved.
Disclosure of Invention
The invention aims to provide a smelting control method of HIC-resistant pressure vessel steel SA516Gr60N, which is characterized in that the smelting control method comprises the steps of optimizing a converter slagging system, refining in an LF furnace to produce oxidized slag for dephosphorization, producing reduced slag for deoxidation and desulfurization, carrying out VD vacuum degassing and impurity removal, and carrying out continuous casting and low-superheat-degree whole-process protective pouring, so that a casting blank has uniform components, phosphorus is less than or equal to 0.008%, sulfur is less than or equal to 0.0015%, oxygen is less than or equal to 15ppm, hydrogen is less than or equal to 1.5ppm, non-metallic impurities are effectively controlled, and the internal quality of the casting blank is good.
The invention is realized by the following technical scheme:
a smelting control method of HIC-resistant pressure vessel steel SA516Gr60N comprises the following key steps of converter smelting, tapping and slagging, LF refining, calcification treatment, VD vacuum refining, continuous casting and casting blank stacking cooling:
(1) smelting in a converter: the converter adopts high-alkalinity, high-oxidability and low-temperature slag system operation, dephosphorization and decarburization are carried out, the end point control oxygen content is more than or equal to 450ppm, the carbon-oxygen product is 0.0030 percent, the tapping temperature is 1570-1600 ℃, and the end point phosphorus content is controlled to be less than or equal to 0.012 percent; slag stopping and tapping, wherein aluminum deoxidation is not carried out after the furnace, and 1.8-2.2 kg/t of steel lime is added in the tapping process;
(2) smelting in a refining furnace: heating the LF furnace to 1550-1570 ℃, adding 2.6-3.0 kg/t of steel lime, making oxidized slag for dephosphorization, adding 2.2-2.6 kg/t of steel lime thick slag, and slagging off, wherein the phosphorus content is controlled to be less than or equal to 0.004% after slagging off; after dephosphorization and slagging-off, sampling, deoxidizing, desulfurizing and alloying the reconstructed reducing slag, and taking out the steel after the components and the temperature of the molten steel reach the target requirements of steel grade; VD is vacuumized, and the vacuum degree is kept below 0.5tor for 15 min; feeding calcium wires 300m twice after the air is broken to carry out calcification treatment on the molten steel, wherein the soft blowing stirring time is more than or equal to 15min until the target temperature is reached, and then loading the molten steel at 1538-1543 ℃;
(3) continuous casting: and (3) low-superheat-degree whole-course protection casting, controlling the superheat degree to be 6-13, performing secondary cooling by adopting dynamic water distribution cooling, and reducing the center segregation and the porosity of the casting blank by adopting a dynamic soft reduction technology.
According to the invention, through optimization of a converter slagging system, refining in an LF furnace to produce oxidation slag for dephosphorization, reduction slag for deoxidation and desulfurization, VD vacuum degassing and impurity removal processes, and continuous casting low-superheat-degree full-process protective pouring, the obtained steel casting blank has uniform components, phosphorus is less than or equal to 0.008%, sulfur is less than or equal to 0.0015%, oxygen is less than or equal to 15ppm, hydrogen is less than or equal to 1.5ppm, non-metal impurities are effectively controlled, and the internal quality of the casting blank is good.
The principle of the invention is as follows:
the converter smelting is carried out by stirring a molten pool by using a large oxygen jet, making a high-alkalinity, high-oxidability and low-temperature slag system, dephosphorizing and decarbonizing, controlling the end point to have oxygen content of more than or equal to 450ppm, controlling the carbon-oxygen product to be 0.0030%, controlling the tapping temperature to be 1570-1600 ℃, controlling the end point to have phosphorus content of less than or equal to 0.012%, tapping by adopting slag stopping, reducing the mixing of high-oxidability slag, not deoxidizing and alloying, keeping the high oxygen content of molten steel, and adding 1.5-2.5 kg/t of steel lime after the converter, thereby creating conditions for subsequent refining.
In the smelting of a refining furnace, heating an LF furnace to 1550-1570 ℃, adding 2.6-3.0 kg/t of steel lime, making oxidized slag for further dephosphorization, making P less than or equal to 0.004% after slagging off, then deoxidizing and desulfurizing by adopting lime and refining slag materials, making high-alkalinity flowing slag, and making the refining slag alkalinity CaO/SiO 2 And = 7.0-8.0, controlling inclusions in molten steel by calcification treatment before leaving the station, and carrying out vacuum treatment in a VD furnace to denitrify the molten steel, and carrying out hydrogen and oxygen treatment, wherein the hydrogen content is less than or equal to 1.5ppm, and the oxygen content is less than or equal to 15 ppm.
Regarding continuous casting, low superheat degree protective casting is adopted in the continuous casting, the production of secondary oxides can be effectively reduced through the whole protective casting, the superheat degree is controlled to be 6-13 ℃, a continuous casting secondary cooling dynamic water distribution technology, a solidification end three-section dynamic soft reduction technology and a reduction of 7-9 mm are adopted, the formation of a central bridge chain is reduced, the central segregation and the porosity are reduced, and the central segregation is less than or equal to 1.0 level; after the casting blank is cut by flame, the casting blank quenching device quenches to be less than or equal to 600 ℃, the casting blank is slowly cooled and uniform in casting blank structure, and the casting blank structure is further stable.
The invention has the advantages that: the production flow is simple, and the alloy cost is low; through the technology of one-time slagging dephosphorization of the converter and further dephosphorization of oxidizing slag by the LF furnace, the traditional smelting process is improved, the traditional molten iron pretreatment process is omitted, the blowing pressure of the converter is reduced, the service life of the converter is prolonged, and meanwhile, the P content of a finished product is stably controlled to be less than or equal to 0.008%; the production in the refining process is stabilized, particularly the P, S is stably controlled, so that the control of the components and the temperature of the molten steel is stable, the stable high-quality molten steel is provided for continuous casting, and the control of the internal and external quality of a casting blank is facilitated; provides the quenching and chilling plus slow cooling technology of continuous casting billets, so that the casting billet structure is finer and more uniform. The HIC-resistant pressure vessel steel SA516Gr60N smelted by the method has the advantages of small component segregation, uniform structure, no more than 1.0 grade of center looseness and general looseness, no more than 0 grade of A, B, C coarse system/fine system inclusions, no more than 1.0 grade of D coarse system/fine system inclusions and excellent internal and external quality of a casting blank.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The invention will be further illustrated with reference to a set of examples for the production of container steel of section SA516Gr60N of 260 mm.
As shown in figure 1, the smelting control method of the HIC-resistant pressure vessel steel SA516Gr60N comprises the following process steps of converter smelting, tapping and slagging, LF refining, calcification treatment, VD vacuum refining, continuous casting and billet dump cooling, wherein the key process steps are shown in each embodiment, and the process parameters are shown in each table.
Example 1:
(1) smelting in a converter: stirring a molten pool by using a large oxygen jet, making high alkalinity (4.5), high oxidability (TFe is 20 percent) and low temperature slag system operation, dephosphorizing and decarbonizing, controlling oxygen 490ppm at the end point, tapping at the temperature of 1583 ℃, tapping by adopting slag stopping, wherein the slag amount after tapping is less than or equal to 1kg/t, carrying out non-deoxidization alloying, adding 300kg of lime after the furnace, and controlling the components after the furnace as shown in Table 1;
(2) smelting in a refining furnace: heating LF furnace to 1565 deg.C, adding 400kg lime to make oxidized slag for further dephosphorization, controlling components after slagging off as shown in Table 2, deoxidizing and desulfurizing with lime and refined slag to make high-alkalinity fluidity slag, and making refined slag alkalinity CaO/SiO 2 = 7.0-8.0, controlling inclusions in molten steel by calcification treatment before leaving the station, carrying out vacuum treatment in a VD furnace, carrying out denitrification, hydrogen and oxygen treatment on the molten steel, wherein the technological parameters of the vacuum treatment are shown in Table 3, and the temperature of the molten steel on the bench is 1539 ℃;
(3) continuous casting: continuous casting adopts low superheat degree full-process protection casting, the superheat degree is controlled to be 6-10 ℃, a continuous casting secondary cooling dynamic water distribution technology and a solidification tail end three-section dynamic soft reduction technology are adopted, the reduction is 7-9 mm, a casting blank is quenched to be less than or equal to 600 ℃ by a casting blank quenching device after flame cutting, and the casting blank is placed into a special stack for stacking cooling.
The smelting components of the tundish are shown in a table 4, and the harmful elements in continuous casting are shown in a table 5.
Example 2:
(1) smelting in a converter: stirring a molten pool by using a large oxygen jet flow, making high alkalinity (4.8), high oxidability (TFe is 22 percent) and low temperature slag system operation, dephosphorizing and decarbonizing, controlling oxygen 484ppm at the end point, tapping at 1580 ℃, adopting slag stopping and tapping, leading the slag amount to be less than or equal to 1kg/t after tapping, carrying out non-deoxidization alloying, and adding 300kg of lime after the furnace;
(2) smelting in a refining furnace: heating LF furnace to 1561 deg.C, adding 400kg lime to make oxidized slag for further dephosphorization, controlling components after slagging off as shown in Table 2, deoxidizing and desulfurizing with lime and refined slag to make high-alkalinity fluidity slag, and making refined slag alkalinity CaO/SiO 2 = 7.0-8.0, controlling inclusions in molten steel by calcification treatment before leaving the station, carrying out vacuum treatment in a VD furnace, carrying out denitrification, hydrogen and oxygen treatment on the molten steel, wherein the technological parameters of the vacuum treatment are shown in Table 3, and the temperature of the molten steel on the station is 1542 ℃;
(3) continuous casting: continuous casting adopts low superheat degree full-process protection casting, the superheat degree is controlled to be 10-13 ℃, a continuous casting secondary cooling dynamic water distribution technology and a solidification tail end three-section dynamic soft reduction technology are adopted, the reduction is 7-9 mm, a casting blank is quenched to be less than or equal to 600 ℃ by a casting blank quenching device after flame cutting, and the casting blank is placed into a special stack for stacking cooling.
The smelting components of the tundish are shown in a table 4, and the harmful elements in continuous casting are shown in a table 5.
Example 3:
(1) smelting in a converter: stirring a molten pool by using a large oxygen jet flow, making high alkalinity (4.6), high oxidability (TFe is 23 percent) and low temperature slag system operation, dephosphorizing and decarbonizing, controlling oxygen 516ppm at the end point, tapping at the temperature of 1587 ℃, tapping by adopting slag stopping, wherein the slag amount after tapping is less than or equal to 1kg/t, carrying out non-deoxidization alloying, adding 300kg of lime after the furnace, and the components at the end point of the converter are shown in Table 1;
(2) smelting in a refining furnace: heating LF furnace to 1565 deg.C, adding 400kg lime to make oxidized slag for further dephosphorization, removing slag to obtain slag with the components shown in Table 2, deoxidizing with lime and refined slag, desulfurizing to obtain high-alkalinity flowing slag, and making refined slag alkalinity CaO/SiO 2 = 7.0-8.0, controlling inclusions in molten steel by calcification treatment before leaving the station, carrying out vacuum treatment in a VD furnace, carrying out denitrification, hydrogen and oxygen treatment on the molten steel, wherein the technological parameters of the vacuum treatment are shown in Table 3, and the temperature of the molten steel on the station is 1540 ℃;
(3) continuous casting: continuous casting adopts low superheat degree full-process protection casting, the superheat degree is controlled to be 7-11 ℃, a continuous casting secondary cooling dynamic water distribution technology and a solidification tail end three-section dynamic soft reduction technology are adopted, the reduction is 7-9 mm, a casting blank is quenched to be less than or equal to 600 ℃ by a casting blank quenching device after flame cutting, and the casting blank is placed into a special stack for stacking cooling.
The smelting components of the tundish are shown in a table 4, and the harmful elements in continuous casting are shown in a table 5.
TABLE 1 converter end-point composition (%)
TABLE 2 dephosphorization post-slagging composition (%)
TABLE 3 VD Process parameters
TABLE 4 continuous casting tundish composition (%)
TABLE 5 content (ppm) of harmful elements in continuous casting
In conclusion: dephosphorizing by a converter, controlling the oxygen to be more than or equal to 450ppm at the end point, and not deoxidizing after the converter; oxidizing slag is manufactured in an LF furnace for further dephosphorization, and reducing slag is manufactured for deoxidation, desulfurization and alloying after slagging off; removing gas in the molten steel by vacuum refining with VD, performing modification treatment on the inclusions by calcification treatment of the molten steel after breaking the empty space, and removing the inclusions by soft blowing and stirring; the continuous casting is carried out in a low superheat degree way without oxidation protection, and harmful elements in molten steel at the smelting end point are realized: the [ P ] is less than or equal to 60ppm, the [ S ] is less than or equal to 15ppm, the [ O ] is less than or equal to 15ppm, the [ N ] is less than or equal to 40ppm, the [ H ] is less than or equal to 1.5ppm, the casting blank is dynamically distributed and cooled by combining continuous casting secondary cooling, the center segregation and the looseness of the casting blank are reduced by adopting a dynamic soft reduction technology, the quality of the inner part and the outer part of the casting blank is better, and the requirement of on-site industrial large-scale production can be met.
Claims (1)
1. A smelting control method of HIC-resistant pressure vessel steel SA516Gr60N comprises the following key process steps of converter smelting, tapping and slagging, LF refining, calcification treatment, VD vacuum refining, continuous casting and casting blank stacking cooling:
(1) smelting in a converter: the converter adopts high-alkalinity, high-oxidability and low-temperature slag system operation to dephosphorize and decarbonize, the endpoint controls oxygen to be more than or equal to 450ppm, carbon-oxygen product is 0.0030 percent, tapping temperature is 1570-1600 ℃, and the endpoint phosphorus content is controlled to be less than or equal to 0.012 percent; slag stopping and tapping, wherein aluminum deoxidation is not carried out after the furnace, and 1.8-2.2 kg/t of steel lime is added in the tapping process;
(2) smelting in a refining furnace: heating the LF furnace to 1550-1570 ℃, adding 2.6-3.0 kg/t of steel lime, making oxidized slag for dephosphorization, adding 2.2-2.6 kg/t of steel lime thick slag, and slagging off, wherein the phosphorus content is controlled to be less than or equal to 0.004% after slagging off; sampling after dephosphorization and slagging, deoxidizing, desulfurizing and alloying the reconstructed reducing slag, and taking out the molten steel when the components and the temperature of the molten steel meet the target requirements of steel grades; VD is vacuumized, and the vacuum degree is kept below 0.5tor for 15 min; feeding calcium wires 300m twice after the air is broken to carry out calcification treatment on the molten steel, wherein the soft blowing stirring time is more than or equal to 15min until the target temperature is reached, and then loading the molten steel at 1538-1543 ℃;
(3) continuous casting: the casting is protected in the whole process with low superheat degree, the superheat degree is controlled to be 6-13 ℃, dynamic water distribution cooling is adopted for secondary cooling, and the center segregation and the looseness of the casting blank are reduced by adopting a dynamic soft reduction technology.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107245652A (en) * | 2017-05-23 | 2017-10-13 | 舞阳钢铁有限责任公司 | The big high die welding performance SA516Gr60 steel plates of thickness and its production method |
| CN108330248A (en) * | 2018-01-04 | 2018-07-27 | 舞阳钢铁有限责任公司 | The smelting process of hydrogenation reactor steel 12Cr2Mo1R (H) |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107245652A (en) * | 2017-05-23 | 2017-10-13 | 舞阳钢铁有限责任公司 | The big high die welding performance SA516Gr60 steel plates of thickness and its production method |
| CN108330248A (en) * | 2018-01-04 | 2018-07-27 | 舞阳钢铁有限责任公司 | The smelting process of hydrogenation reactor steel 12Cr2Mo1R (H) |
Non-Patent Citations (1)
| Title |
|---|
| 张新理等: "抗酸压力容器钢SA516Gr60连铸坯质量研究", 中北大学学报(自然科学版) * |
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