CN117535578A - Production and manufacturing method for improving drop hammer performance of hot rolled steel plate for low-temperature station yard pipe - Google Patents
Production and manufacturing method for improving drop hammer performance of hot rolled steel plate for low-temperature station yard pipe Download PDFInfo
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- CN117535578A CN117535578A CN202410030643.4A CN202410030643A CN117535578A CN 117535578 A CN117535578 A CN 117535578A CN 202410030643 A CN202410030643 A CN 202410030643A CN 117535578 A CN117535578 A CN 117535578A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 119
- 239000010959 steel Substances 0.000 title claims abstract description 119
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 79
- 238000001816 cooling Methods 0.000 claims abstract description 67
- 238000005096 rolling process Methods 0.000 claims abstract description 55
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000007872 degassing Methods 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000009749 continuous casting Methods 0.000 claims abstract description 15
- 238000003303 reheating Methods 0.000 claims abstract description 15
- 238000007670 refining Methods 0.000 claims abstract description 14
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 12
- 230000023556 desulfurization Effects 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 239000012535 impurity Substances 0.000 claims description 16
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 238000012937 correction Methods 0.000 claims description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 9
- 229910052791 calcium Inorganic materials 0.000 claims description 9
- 239000011575 calcium Substances 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 3
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 3
- 239000000378 calcium silicate Substances 0.000 claims description 3
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000004925 denaturation Methods 0.000 claims description 3
- 230000036425 denaturation Effects 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000010583 slow cooling Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 238000009489 vacuum treatment Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000009628 steelmaking Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 4
- 238000010008 shearing Methods 0.000 abstract description 3
- 238000009851 ferrous metallurgy Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000002436 steel type Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 229910001568 polygonal ferrite Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
-
- 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
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
-
- 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
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
-
- 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
- C21C7/064—Dephosphorising; Desulfurising
-
- 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
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
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- 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
- C22C38/06—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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- 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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- 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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- 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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/225—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by hot-rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
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Abstract
The invention provides a production and manufacturing method for improving drop hammer performance of a hot rolled steel plate for a low-temperature station pipe, which relates to the technical field of ferrous metallurgy and comprises the steps of configuring steel components, KR desulfurization, BOF converter, LF refining, RH degassing, CCM continuous casting, slab reheating, rough rolling, intermediate slab cooling to be warm, finish rolling, accelerated cooling hot straightening, natural cooling, steel plate warm straightening and cold straightening, offline stack cooling, ultrasonic flaw detection and finishing; the prior art has the problems that the strength performance of the pipeline steel for the station is insufficient and the low-temperature toughness is insufficient in the low-temperature exposed use state; the steel plate produced by the method has the thickness of more than or equal to 15mm and the steel grade of L485/X70, and has good drop hammer performance by reasonably adjusting the chemical components and the process of the steel: the average value of the drop hammer shearing surface ratio at minus 35 ℃ is more than or equal to 85%, and the method has good low-temperature toughness, and the production and manufacturing method for improving the drop hammer performance of the hot rolled steel plate for the low-temperature station field pipe has great significance for the current pipeline construction.
Description
Technical Field
The invention relates to the technical field of ferrous metallurgy, in particular to a production and manufacturing method for improving drop hammer performance of a hot rolled steel plate for a low-temperature station yard pipe.
Background
The pipeline transportation is an effective, economical, safe and environment-friendly transportation mode of petroleum and natural gas, the pipeline steel for the station is mainly used for construction of a pipeline transfer station, is exposed on the ground, has relatively strict performance requirements on temperature, and is generally the historical lowest temperature of the area; the steel for the natural gas transmission line is pressurized, and is characterized in that the thickness specification and the strength performance are higher than those of a common line pipe, and the low-temperature toughness requirement is higher than that of the common line pipe steel; the existing pipeline steel for the station is insufficient in strength when being used in a low-temperature exposed state, and has the problem of insufficient low-temperature toughness.
Disclosure of Invention
In order to solve the problems of insufficient strength performance and insufficient low-temperature toughness of the pipeline steel for the station and the field in the prior art under the condition of low-temperature exposure use, the invention provides a production and manufacturing method for improving the drop hammer performance of a hot rolled steel plate for the station and the field, which comprises the following steps of
Step one: preparing steel grade components; the steel comprises the following chemical components in percentage by mass: c:0.03 to 0.06wt%, si: 0.15-0.25 wt%, mn: 1.60-1.70 wt%, P: less than or equal to 0.015wt percent, S: less than or equal to 0.05wt percent, cr: 0.10-0.20wt%, ni: 0.10-0.20wt%, mo:0.08 to 0.15wt% of Nb: 0.05-0.07 wt% of Ti: 0.01-0.02 wt%, al: 0.02-0.05 wt%, pcm not more than 0.19wt% and Fe and unavoidable impurity elements as the rest;
step two: BOF converter after KR desulfurization; molten iron after KR desulfurization enters a 180T top-bottom combined blown converter to make steel, and after the temperature and C, O meet the technological requirements, the molten steel enters a next LF refining process;
step three: LF refining, RH degassing and CCM continuous casting; LF refining mainly carries out fine adjustment on components and removes impurities in molten steel, and when the components and the temperature meet the process requirements, the molten steel is sent to an RH degassing procedure; RH degassing is vacuum treatment for removing H, N and impurities in molten steel; feeding a calcium wire after the RH degassing furnace, carrying out inclusion denaturation treatment, and carrying out ladle bottom argon blowing soft stirring after the calcium wire is fed to remove impurities; the slab continuous casting stage adopts a large ladle long nozzle, a tundish covering agent, a submerged nozzle and an argon seal to perform non-oxidation protection pouring in the whole process;
step four: reheating the slab, rough rolling, cooling the intermediate slab to a temperature, and finish rolling; performing rough rolling after a reheating process on the slab subjected to continuous casting; the slab reheating adopts step heating; the rough rolling temperature in the rough rolling stage is controlled to be 950-1050 ℃, and the single-pass reduction after stretching (except the last pass) in the rough rolling stage is more than or equal to 30mm; performing finish rolling after the rough rolled intermediate billet is cooled at a temperature; the finish rolling starting temperature is less than or equal to 760 ℃, and a low finish rolling process is adopted;
step five: accelerating cooling, hot straightening, natural cooling, steel plate temperature straightening and cold straightening; in the accelerated cooling and hot straightening stage, a MULPIC accelerated cooling system is adopted; the low final rolling weak cooling speed mode is used for guaranteeing uniformity of surface and center tissues so as to obtain good drop hammer performance; cooling the steel plate to room temperature in the cooling bed; in the steel plate straightening stage, plate type correction is carried out by adopting warm correction and cold correction;
step six: cooling the wire by stacking, performing ultrasonic flaw detection and finishing; after correction, the steel plate is immediately put on a cooling bed for slow cooling, and when the temperature of the steel plate is lower than 80 ℃ in an air cooling mode, the steel plate is subjected to ultrasonic flaw detection; non-destructive inspection of Steel pipe part 9 according to ISO 10893-9:2011: and (3) carrying out finishing and warehousing after flaw detection on the steel plate of U1 standard in automatic ultrasonic detection of lamellar defect detection in strip plates for manufacturing welded steel pipes.
According to the production and manufacturing method for improving the drop hammer performance of the hot rolled steel plate for the low-temperature station field pipe, preferably, the S content of molten iron after KR desulfurization is required to be less than or equal to 0.005%.
The production and manufacturing method for improving the drop hammer performance of the hot rolled steel plate for the low-temperature station pipe, provided by the invention, is preferable, and the parameters meeting the technological requirements of steelmaking in the step two are as follows: the temperature reaches 1640+/-20 ℃, the C content reaches 0.02-0.05 wt% and the O is less than or equal to 1000ppm.
The production and manufacturing method for improving the drop hammer performance of the hot rolled steel plate for the low-temperature station pipe, which is provided by the invention, is preferable, and meets the technological parameter requirements of LF refining: the components are as follows: c:0.03 to 0.06wt%, si: 0.15-0.25 wt%, mn: 1.60-1.70 wt%, cr: 0.10-0.20wt%, ni: 0.10-0.20wt%, mo:0.08 to 0.15wt% of Nb: 0.05-0.07 wt% of Ti: 0.01-0.02wt%; temperature: and the temperature reaches 1615+/-10 ℃.
The production and manufacturing method for improving the drop hammer performance of the hot rolled steel plate for the low-temperature station pipe provided by the invention has the following preferable technological parameter requirements of RH degassing: vacuum degree is less than 2mbar, H is less than 2.0ppm.
According to the production and manufacturing method for improving the drop hammer performance of the hot rolled steel plate for the low-temperature station pipe, the length of a calcium silicate wire fed into an RH degassing furnace is 150 meters; the soft stirring time after the calcium wire is fed is not less than 12 minutes.
According to the production and manufacturing method for improving the drop hammer performance of the hot rolled steel plate for the low-temperature station pipe, the superheat degree of a tundish in a slab continuous casting stage is preferably controlled to be 25+/-5 ℃, and the pulling speed is preferably 0.6-0.7 m/min.
According to the production and manufacturing method for improving the drop hammer performance of the hot rolled steel plate for the low-temperature station field pipe, the section of the slab is 320mm in the slab reheating stage, the width of the slab is 1500-230mm, the temperature of the preheating section is 1000-1150 ℃, the temperature of the first section is 1100-1200 ℃, the temperature of the second section is 1170-1230 ℃, the temperature of the soaking section is 1170-1220 ℃, and the furnace time is not less than 1.2min/mm.
According to the production and manufacturing method for improving the drop hammer performance of the hot rolled steel plate for the low-temperature station pipe, the finish rolling temperature of the steel plate in the finish rolling stage is preferably controlled at 730+/-20 ℃, and the total compression ratio in the finish rolling stage is more than or equal to 75%.
According to the production and manufacturing method for improving the drop hammer performance of the hot rolled steel plate for the low-temperature station pipe, the roll speed in the accelerated cooling hot straightening stage is preferably carried out according to 1.5+/-0.2 m/s, the water quantity in the 4 areas is averagely started, the excessive cooling rate is avoided, and the cooling rate is controlled to be 23-25 ℃/s.
The invention provides a production and manufacturing method for improving drop hammer performance of a hot rolled steel plate for a low-temperature station field pipe, which comprises the steps of configuring steel type components, KR desulfurization, BOF converter, LF refining, RH degassing, CCM continuous casting, slab reheating, rough rolling, intermediate blank cooling to be warm, finish rolling, accelerated cooling and hot straightening, natural cooling, steel plate temperature straightening and cold straightening, offline stacking and cooling, ultrasonic flaw detection and finishing; the prior art has the problems that the strength performance of the pipeline steel for the station is insufficient and the low-temperature toughness is insufficient in the low-temperature exposed use state; the steel plate produced by the method has the thickness of more than or equal to 15mm and the steel grade of L485/X70, and has good drop hammer performance by reasonably adjusting the chemical components and the process of the steel: the average value of the drop hammer shearing surface ratio at the temperature of minus 35 ℃ is more than or equal to 85%, and the method has good low-temperature toughness, and the production and manufacturing method for improving the drop hammer performance of the hot rolled steel plate for the low-temperature station field pipe has important significance for the current pipeline construction.
Drawings
FIG. 1 is a surface texture diagram of a steel plate produced by a production and manufacturing method for improving drop hammer performance of a hot rolled steel plate for a low-temperature station yard pipe;
FIG. 2 is a structure diagram of a 1/2 thickness part of a steel plate produced by the production and manufacturing method for improving the drop hammer performance of a hot rolled steel plate for a low-temperature station pipe;
FIG. 3 is a structure diagram of a 1/4 thickness part of a steel plate produced by the production and manufacturing method for improving the drop hammer performance of a hot rolled steel plate for a low-temperature station pipe;
FIG. 4 is a process flow diagram of a production and manufacturing method for improving the drop hammer performance of a hot rolled steel plate for a low-temperature station yard pipe.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
In the description of the present invention, it should be understood that the terms "left", "right", "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and "first", "second", etc. do not indicate the importance of the components, and thus are not to be construed as limiting the present invention. The specific dimensions adopted in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present invention.
Specific examples: as shown in fig. 1 to 4, the production and manufacturing method for improving the drop hammer performance of a hot rolled steel plate for a low-temperature station pipe provided by the invention comprises the following steps:
step one: preparing steel grade components; the steel comprises the following chemical components in percentage by mass: c:0.03 to 0.06wt%, si: 0.15-0.25 wt%, mn: 1.60-1.70 wt%, P: less than or equal to 0.015wt percent, S: less than or equal to 0.05wt percent, cr: 0.10-0.20wt%, ni: 0.10-0.20wt%, mo:0.08 to 0.15wt% of Nb: 0.05-0.07 wt% of Ti: 0.01-0.02 wt%, al: 0.02-0.05 wt%, pcm not more than 0.19wt% and Fe and unavoidable impurity elements as the rest;
step two: BOF converter after KR desulfurization; molten iron after KR desulfurization enters a 180T top-bottom combined blown converter to make steel, the S content requirement of the molten iron after KR desulfurization is less than or equal to 0.005%, and when the temperature and C, O meet the process requirements: temperature: 1640 ℃ +/-20 ℃ and C content: after 0.02-0.05wt% and less than or equal to 1000ppm of O, delivering the molten steel into a next LF refining process;
step three: LF refining, RH degassing and CCM continuous casting; LF refining mainly carries out fine adjustment on components and removes impurities in molten steel, and the refined components are as follows: c:0.03 to 0.06wt%, si: 0.15-0.25 wt%, mn: 1.60-1.70 wt%, cr: 0.10-0.20wt%, ni: 0.10-0.20wt%, mo:0.08 to 0.15wt% of Nb: 0.05-0.07 wt% of Ti: 0.01-0.02wt%; when the temperature reaches 1615+/-10 ℃, the molten steel is sent to an RH degassing procedure; RH degassing is vacuum treatment for removing H, N and impurities in molten steel; the technological parameter requirements of RH degassing are as follows: vacuum degree is less than 2mbar, H is less than 2.0ppm; feeding a calcium wire after the RH degassing furnace, wherein the length of the fed calcium silicate wire is 150 meters; carrying out inclusion denaturation treatment, after calcium wire feeding, carrying out ladle bottom argon blowing soft stirring to remove impurities, wherein the soft stirring time after calcium wire feeding is not less than 12 minutes; the slab continuous casting stage adopts a large ladle long nozzle, a tundish covering agent, a submerged nozzle and an argon seal to perform non-oxidation protection casting in the whole process, wherein the superheat degree of the tundish in the slab continuous casting stage is controlled at 25+/-5 ℃, and the pulling speed is 0.6-0.7 m/min;
step four: reheating the slab, rough rolling, cooling the intermediate slab to a temperature, and finish rolling; performing rough rolling after a reheating process on the slab subjected to continuous casting; the slab reheating adopts step heating; the section of the slab is 320mm in the slab reheating stage, the width of the slab is 1500-2300mm, the temperature of the preheating stage is 1000-1150 ℃, the first-stage heating temperature is 1100-1200 ℃, the second-stage heating temperature is 1170-1230 ℃, the temperature of the soaking stage is 1170-1220 ℃, and the furnace time is not less than 1.2min/mm; the rough rolling temperature in the rough rolling stage is controlled to be 950-1050 ℃, and the single-pass reduction after stretching (except the last pass) in the rough rolling stage is more than or equal to 30mm; performing finish rolling after the rough rolled intermediate billet is cooled at a temperature; the finish rolling starting temperature is less than or equal to 760 ℃, the finish rolling temperature of the steel plate in the finish rolling stage is controlled at 730+/-20 ℃ by adopting a low finish rolling process, and the total compression ratio in the finish rolling stage is more than or equal to 75%;
step five: accelerating cooling, hot straightening, natural cooling, steel plate temperature straightening and cold straightening; in the accelerated cooling and hot straightening stage, a MULPIC accelerated cooling system is adopted; the roller speed in the accelerated cooling hot straightening stage is executed according to 1.5+/-0.2 m/s, the water quantity in the 4 areas is averagely started, the excessive cooling rate is avoided, the cooling rate is controlled to be 23-25 ℃/s, and the uniformity of the surface and the center tissue is ensured by using a low final rolling weak cooling rate mode so as to obtain good drop hammer performance; cooling the steel plate to room temperature in the cooling bed; in the steel plate straightening stage, plate type correction is carried out by adopting warm correction and cold correction;
step six: cooling the wire by stacking, performing ultrasonic flaw detection and finishing; after correction, the steel plate is immediately put on a cooling bed for slow cooling, and when the temperature of the steel plate is lower than 80 ℃ in an air cooling mode, the steel plate is subjected to ultrasonic flaw detection; non-destructive inspection of Steel pipe part 9 according to ISO 10893-9:2011: and (3) carrying out finishing and warehousing after flaw detection on the steel plate of U1 standard in automatic ultrasonic detection of lamellar defect detection in strip plates for manufacturing welded steel pipes.
As shown in table one and table two: station line steel production was performed according to the above method, and the station line steel after production was subjected to performance test according to API Spec 5L (46 th edition), tensile property standard reference american standard ASTM a370, drop weight property test standard reference API RP 5L3.
Example 1:
the invention provides a production and manufacturing method for improving drop hammer performance of a hot rolled steel plate for a low-temperature station pipe, which comprises the following chemical components in percentage by mass: c:0.04wt%, si:0.18wt%, mn:1.65wt%, P:0.012wt%, S:0.0025wt%, cr:0.17wt%, ni:0.12wt%, mo:0.10wt%, nb:0.056wt%, ti:0.014wt%, al:0.03wt%, pcm:0.15wt% of Fe and the balance of unavoidable impurity elements; rough rolling temperature °c: 1010 ℃; and (5) waiting for temperature and thickness: 105mm; finish rolling start temperature: 767 ℃; finishing temperature: 755 deg.c; cooling temperature: 730 deg.c; final cooling temperature: 321 ℃; roller speed: 1.7 m/s; cooling rate: 29 ℃/s, the mechanical properties of the mother board obtained after the steps one to six are as follows: yield strength (Rt0.5 MPa): 572; tensile strength (RmMPa): 641; rt0.5/Rm:0.89; elongation a (%): 51.5; -drop hammer fracture shear face ratio SA at 35 °: SA1: 80. SA2: 78. SA average: 79.
example 2:
the invention provides a production and manufacturing method for improving drop hammer performance of a hot rolled steel plate for a low-temperature station pipe, which comprises the following chemical components in percentage by mass: c:0.043wt%, si:0.19wt%, mn:1.64wt%, P:0.010wt%, S:0.002wt%, cr:0.16wt%, ni:0.13wt%, mo:0.097wt%, nb:0.055wt%, ti:0.014wt%, al:0.035wt%, pcm:0.15wt% of Fe and the balance of unavoidable impurity elements; rough rolling temperature °c: 1015 ℃; and (5) waiting for temperature and thickness: 105mm; finish rolling start temperature: 764 ℃; finishing temperature: 751 ℃; cooling temperature: 727 ℃; final cooling temperature: 349 ℃; roller speed: 1.5 m/s; cooling rate: 23 ℃/s, the mechanical properties of the mother board obtained after the steps one to six are as follows: yield strength (Rt0.5 MPa): 553; tensile strength (RmMPa): 645; rt0.5/Rm:0.86; elongation a (%): 48; -drop hammer fracture shear face ratio SA at 35 °: SA1: 86. SA2: 84. SA average: 85.
example 3:
the invention provides a production and manufacturing method for improving drop hammer performance of a hot rolled steel plate for a low-temperature station pipe, which comprises the following chemical components in percentage by mass: c:0.039wt%, si:0.18wt%, mn:1.64wt%, P:0.013wt%, S:0.037wt%, cr:0.16wt%, ni:0.12wt%, mo:0.103wt%, nb:0.054wt%, ti:0.015wt%, al:0.032wt%, pcm:0.15wt% of Fe and the balance of unavoidable impurity elements; rough rolling temperature °c: 1018 ℃; and (5) waiting for temperature and thickness: 105mm; finish rolling start temperature: 758 ℃; finishing temperature: 745 deg.c; cooling temperature: 724 ℃; final cooling temperature: 320 ℃; roller speed: 1.3 m/s; cooling rate: the mechanical properties of the mother board obtained after the steps one to six are as follows: yield strength (Rt0.5 MPa): 545; tensile strength (RmMPa): 640, a base; rt0.5/Rm:0.85; elongation a (%): 45.5; -drop hammer fracture shear face ratio SA at 35 °: SA1: 82. SA2: 85. SA average: 83.5.
example 4:
the invention provides a production and manufacturing method for improving drop hammer performance of a hot rolled steel plate for a low-temperature station pipe, which comprises the following chemical components in percentage by mass: 0.042wt%, si:0.19wt%, mn:1.64wt%, P:0.013wt%, S:0.0022wt%, cr:0.16wt%, ni:0.13wt%, mo:0.10wt%, nb:0.05wt%, ti:0.015wt%, al:0.044wt%, pcm:0.15wt% of Fe and the balance of unavoidable impurity elements; rough rolling temperature °c: 1008 ℃; and (5) waiting for temperature and thickness: 105mm; finish rolling start temperature: 750 ℃; finishing temperature: 734 deg.c; cooling temperature: 714 deg.c; final cooling temperature: 334 ℃; roller speed: 1.6 m/s; cooling rate: the mechanical properties of the mother board obtained after the steps one to six are 25 ℃/s: yield strength (Rt0.5 MPa): 515; tensile strength (Rm MPa): 635; rt0.5/Rm:0.81; elongation a (%): 51; -drop hammer fracture shear face ratio SA at 35 °: SA1: 92. SA2: 90. SA average: 91.
table one is the control parameters of the smelting furnace times and the mother plate rolling process of the embodiment:
table two is the mechanical properties of the example motherboard:
therefore, when the cooling rate is 25 ℃/s, the steel plate has the best drop hammer performance at the temperature of minus 35 ℃, the yield strength is reduced to some extent, and the tensile strength is basically kept consistent, so that the steel plate has lower yield ratio, and the steel plate forms a double-phase structure of polygonal ferrite and granular bainite in metallographic view, so that the drop hammer performance of the steel plate is greatly improved, the high toughness of the steel plate is ensured, and meanwhile, the steel plate has lower yield ratio, and can meet the strength requirements of high-pressure and high-flow conveying and the toughness requirements of crack initiation prevention and crack stop.
In summary, the production and manufacturing method for improving the drop hammer performance of the hot rolled steel plate for the low-temperature station field pipe provided by the invention comprises the steps of configuring steel type components, KR desulfurization, BOF converter, LF refining, RH degassing, CCM continuous casting, slab reheating, rough rolling, intermediate slab cooling, finish rolling, accelerated cooling and hot straightening, natural cooling, steel plate temperature straightening and cold straightening, off-line stack cooling, ultrasonic flaw detection and finishing; the prior art has the problems that the strength performance of the pipeline steel for the station is insufficient and the low-temperature toughness is insufficient in the low-temperature exposed use state; the steel plate produced by the method has the thickness of more than or equal to 15mm and the steel grade of L485/X70, and has good drop hammer performance by reasonably adjusting the chemical components and the process of the steel: the average value of the drop hammer shearing surface ratio at minus 35 ℃ is more than or equal to 85%, and the method has good low-temperature toughness, and the production and manufacturing method for improving the drop hammer performance of the hot rolled steel plate for the low-temperature station field pipe has great significance for the current pipeline construction.
While the present invention has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the invention. Many modifications and substitutions of the present invention will become apparent to those of ordinary skill in the art upon reading the foregoing. Within the technical conception scope of the invention, a plurality of equivalent changes can be carried out on the technical proposal of the invention, and the equivalent changes belong to the protection scope of the invention.
Claims (10)
1. A production and manufacturing method for improving drop hammer performance of a hot rolled steel plate for a low-temperature station field pipe is characterized by comprising the following steps of
Step one: preparing steel grade components; the steel comprises the following chemical components in percentage by mass: c:0.03 to 0.06wt%, si: 0.15-0.25 wt%, mn: 1.60-1.70 wt%, P: less than or equal to 0.015wt percent, S: less than or equal to 0.05wt percent, cr: 0.10-0.20wt%, ni: 0.10-0.20wt%, mo:0.08 to 0.15wt% of Nb: 0.05-0.07 wt% of Ti: 0.01-0.02 wt%, al: 0.02-0.05 wt%, pcm not more than 0.19wt% and Fe and unavoidable impurity elements as the rest;
step two: BOF converter after KR desulfurization; molten iron after KR desulfurization enters a 180T top-bottom combined blown converter to make steel, and after the temperature and C, O meet the technological requirements, the molten steel enters a next LF refining procedure;
step three: LF refining, RH degassing and CCM continuous casting; the LF refining mainly carries out fine adjustment on components and removes impurities in molten steel, and when the components and the temperature meet the technological requirements, the molten steel is sent to the RH degassing procedure; the RH degassing is vacuum treatment and is used for removing H, N and impurities in molten steel; feeding a calcium wire after the RH degassing furnace, carrying out inclusion denaturation treatment, and carrying out ladle bottom argon blowing soft stirring after the calcium wire is fed to remove impurities; the slab continuous casting stage adopts a large ladle long nozzle, a tundish covering agent, a submerged nozzle and an argon seal to perform non-oxidation protection pouring in the whole process;
step four: reheating the slab, rough rolling, cooling the intermediate slab to a temperature, and finish rolling; performing rough rolling after a reheating process on the slab subjected to continuous casting; the slab reheating adopts stepping heating; the rough rolling temperature in the rough rolling stage is controlled to be 950-1050 ℃, and the single-pass rolling reduction after the rough rolling stage is widened is more than or equal to 30mm; performing finish rolling after the rough rolled intermediate billet is cooled at a temperature; the finish rolling starting temperature is less than or equal to 760 ℃, and a low finish rolling process is adopted;
step five: accelerating cooling, hot straightening, natural cooling, steel plate temperature straightening and cold straightening; the accelerated cooling and hot straightening stage adopts a MULPIC accelerated cooling system; the low final rolling weak cooling speed mode is used for guaranteeing uniformity of surface and center tissues so as to obtain good drop hammer performance; cooling the steel plate to room temperature in the cooling bed; in the steel plate straightening stage, plate type correction is carried out by adopting warm correction and cold correction;
step six: cooling the wire by stacking, performing ultrasonic flaw detection and finishing; after correction, the steel plate is immediately put on a cooling bed for slow cooling, and when the temperature of the steel plate is lower than 80 ℃ in an air cooling mode, the steel plate is subjected to ultrasonic flaw detection; and finishing and warehousing after flaw detection of the steel plate.
2. The production and manufacturing method for improving drop hammer performance of hot rolled steel plates for low temperature station pipes as claimed in claim 1, wherein the S content of molten iron after KR desulfurization is less than or equal to 0.005%.
3. The production and manufacturing method for improving the drop hammer performance of the hot rolled steel plate for the low temperature station yard pipe according to claim 1, wherein the parameters meeting the technological requirements of the steelmaking in the second step are as follows: the temperature reaches 1640+/-20 ℃, the C content reaches 0.02-0.05 wt% and the O is less than or equal to 1000ppm.
4. The production and manufacturing method for improving drop hammer performance of hot rolled steel plates for low-temperature station pipes as claimed in claim 1, wherein the process parameter requirements of the LF refining are satisfied: the components are as follows: c:0.03 to 0.06wt%, si: 0.15-0.25 wt%, mn: 1.60-1.70 wt%, cr: 0.10-0.20wt%, ni: 0.10-0.20wt%, mo:0.08 to 0.15wt% of Nb: 0.05-0.07 wt% of Ti: 0.01-0.02wt%; temperature: and the temperature reaches 1615+/-10 ℃.
5. The production and manufacturing method for improving drop hammer performance of hot rolled steel plate for low temperature station yard pipe according to claim 1, wherein the technological parameters of the RH degassing are as follows: vacuum degree is less than 2mbar, H is less than 2.0ppm.
6. The production and manufacturing method for improving drop hammer performance of hot rolled steel plates for low temperature station pipes according to claim 1, wherein the length of a calcium silicate wire fed into the RH degassing furnace is 150 meters; the soft stirring time after the calcium wire is fed is not less than 12 minutes.
7. The production and manufacturing method for improving drop hammer performance of hot rolled steel plates for low-temperature station pipes, as claimed in claim 1, wherein the superheat degree of a tundish in the slab continuous casting stage is controlled to be 25+/-5 ℃ and the pulling speed is controlled to be 0.6-0.7 m/min.
8. The production and manufacturing method for improving drop hammer performance of hot rolled steel plates for low-temperature station pipes, as claimed in claim 1, is characterized in that the section of a slab in the slab reheating stage is 320mm, the width of the slab is 1500-230mm, the temperature of a preheating stage is 1000-1150 ℃, the temperature of a first stage is 1100-1200 ℃, the temperature of a second stage is 1170-1230 ℃, the temperature of a soaking stage is 1170-1220 ℃, and the furnace time is not less than 1.2min/mm.
9. The method for manufacturing the hot rolled steel plate for the low temperature station pipe, according to claim 1, wherein the final rolling temperature of the steel plate in the finish rolling stage is controlled to be 730+/-20 ℃, and the total compression ratio in the finish rolling stage is more than or equal to 75%.
10. The production and manufacturing method for improving the drop hammer performance of the hot rolled steel plate for the low-temperature station yard pipe according to claim 1, wherein the roller speed in the accelerated cooling and hot straightening stage is carried out at 1.5+/-0.2 m/s, the water quantity in the 4 areas is averagely started, the excessive cooling rate is avoided, and the cooling rate is controlled to be 23-25 ℃/s.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102304667A (en) * | 2011-09-22 | 2012-01-04 | 首钢总公司 | X100 pipeline steel plate with good low temperature toughness and preparation method thereof |
| CN105950973A (en) * | 2016-05-13 | 2016-09-21 | 江阴兴澄特种钢铁有限公司 | Thick-specification X80 pipeline steel plate excellent in ultralow-temperature drop hammer performance and manufacturing method thereof |
| CN107502821A (en) * | 2017-08-29 | 2017-12-22 | 江阴兴澄特种钢铁有限公司 | The economical X 70 pipeline steel plate and its manufacture method used under a kind of special think gauge ultra-low temperature surroundings |
| CN115449709A (en) * | 2022-08-30 | 2022-12-09 | 鞍钢股份有限公司 | Thick-specification high-strength high-toughness L485M pipeline steel and production method thereof |
| CN116287621A (en) * | 2023-05-15 | 2023-06-23 | 江苏省沙钢钢铁研究院有限公司 | Double-resistance pipeline steel plate and production method thereof |
| CN117165870A (en) * | 2023-08-31 | 2023-12-05 | 江苏沙钢集团有限公司 | Hot rolled steel plate for large-wall-thickness submarine pipeline and manufacturing method |
-
2024
- 2024-01-09 CN CN202410030643.4A patent/CN117535578A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102304667A (en) * | 2011-09-22 | 2012-01-04 | 首钢总公司 | X100 pipeline steel plate with good low temperature toughness and preparation method thereof |
| CN105950973A (en) * | 2016-05-13 | 2016-09-21 | 江阴兴澄特种钢铁有限公司 | Thick-specification X80 pipeline steel plate excellent in ultralow-temperature drop hammer performance and manufacturing method thereof |
| CN107502821A (en) * | 2017-08-29 | 2017-12-22 | 江阴兴澄特种钢铁有限公司 | The economical X 70 pipeline steel plate and its manufacture method used under a kind of special think gauge ultra-low temperature surroundings |
| CN115449709A (en) * | 2022-08-30 | 2022-12-09 | 鞍钢股份有限公司 | Thick-specification high-strength high-toughness L485M pipeline steel and production method thereof |
| CN116287621A (en) * | 2023-05-15 | 2023-06-23 | 江苏省沙钢钢铁研究院有限公司 | Double-resistance pipeline steel plate and production method thereof |
| CN117165870A (en) * | 2023-08-31 | 2023-12-05 | 江苏沙钢集团有限公司 | Hot rolled steel plate for large-wall-thickness submarine pipeline and manufacturing method |
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