CN108504931B - A kind of submerged pipeline steel and its production method - Google Patents
A kind of submerged pipeline steel and its production method Download PDFInfo
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- CN108504931B CN108504931B CN201810436793.XA CN201810436793A CN108504931B CN 108504931 B CN108504931 B CN 108504931B CN 201810436793 A CN201810436793 A CN 201810436793A CN 108504931 B CN108504931 B CN 108504931B
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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
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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
- C21D8/0205—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
-
- 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
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention provides a kind of submerged pipeline steel and its production methods, its chemical component mass percentage content are as follows: C0.030%-0.070%, Si0.15%-0.30%, Mn1.35%-1.65%, Nb0.030%-0.060%, V0.020%-0.040%, Ti0.010%-0.040%, Mo0.05%-0.30%, S≤0.0020%, P≤0.015%, remaining is Fe and inevitable impurity element.Compared with prior art, the present invention passes through ingredient design, hot rolling technology, microscopic structure and performance control technique, obtain uniform ferrite+fine pearlite tissue, material has 10-12 grades of grain size, 1.0 grades of banded structure, low non-metallic inclusion, yield strength, elongation percentage higher than 448MPa or more are greater than 30%, ballistic work is greater than 300J, has excellent toughness.
Description
Technical field
The invention belongs to field of iron and steel, and in particular to a kind of submerged pipeline steel and its production method.
Background technique
With continually developing for offshore oil and gas field, the exploitation of offshore oil gradually develops from coastal waters to deep-sea, sea-bottom oil-gas
Transport pipeline has become the important transportation means for being widely used in Offshore Oil Industry, and it is most fast to become continuous a large amount of conveying oil gas
Prompt, most safe, most economical effective mode.China's marine resources are abundant, and petroleum resource cities are 24,000,000,000 t, and natural gas resources are
14000000000000 m3, develop and utilize these resources and need China of import to have very important significance oil gas.By the end of
2014, the submarine pipeline that China has been built up about 2000km, wherein the submarine pipeline of 8 oil (gas) Tian Jiancheng in the Bohai Sea was accumulative about
186km, the submarine pipeline that 13 oil (gas) fields in the South Sea are laid with are accumulative more than 1000km.
China shares 81 oil gas fields in the Bohai Sea, the South Sea, East Sea region, and the gross area is more than 1,600,000 square kilometres, oil gas
Matter stock number is up to 39,000,000,000 tons, and most of oil gas needs to convey by submerged pipeline.China will be dedicated to promoting for 20 years in future
" marine grand celebration " strategy, builds the deep water Gas Productivity of 40,000,000,000-500 billion cubic meters, invests in the exploration and development of coming 10 years
200,000,000,000 yuan are up to, the upsurge that this behave will bring submarine pipeline to build.Submarine pipeline is transported as petroleum gas
Most quick, most economical and most effective means of transportation, it will great demand is generated to deep-sea pipeline steel.
Patent CN 102409224 A " the think gauge submerged pipeline hot rolled steel plate of excellent in low temperature toughness and its manufacturer
Method " describes a kind of submerged pipeline steel hot rolled steel plate, in steel other than it joined the elements such as Nb, V, Ti, Mo, is also added into
The elements such as Ni, Cu, Cr, the ingredient design of this and the invention patent have biggish difference, and the Wide and Thick Slab production that the patent proposes
Method.
201110350933 X of patent CN " a kind of deep-sea pipe line steel and its manufacturing method based on steekle mill production " is explained
It has stated a kind of using low C, high Mn, the ingredient design of the alloying elements such as addition Nb, Cr, Cu, Ni, Mo in right amount, in conjunction with TMCP technique
The method for manufacturing X65 grades of submerged pipeline steel, this method are produced using steekle mill, are had with traditional hot continuous rolling mode in this patent
It is distinguished.
Summary of the invention
The purpose of the present invention is to provide a kind of submerged pipeline steel, containing very low carbon content, and have extremely low sulphur
Content and phosphorus content are that product has excellent performance.
The present invention also provides a kind of production methods of submerged pipeline steel, under TMCP process system, adjust controlled rolling
And Controlled cooling process, obtain uniform ferrite+fine pearlite tissue.
Specific technical solution of the present invention is as follows:
A kind of submerged pipeline steel provided by the invention, chemical component mass percentage content are as follows: C 0.030%-
0.070%, Si 0.15%-0.30%, Mn 1.35%-1.65%, Nb 0.030%-0.060%, V 0.020%-
0.040%, Ti 0.010%-0.040%, Mo 0.05%-0.30%, S≤0.0020%, P≤0.015%, remaining for Fe and
Inevitable impurity element.
A kind of production method of submerged pipeline steel provided by the invention, method are as follows:
Deep Desulphurization of Hot Metal is de- to S≤0.0050%, converter top bottom blowing, alloy fine tuning, the refining of LF furnace, RH furnace vacuum
It gas, sheet billet continuous casting, heating of plate blank ,+7 rack finish rolling of 2 rack roughing, section cooling and batches.
Specifically:
Guarantee depth degassing time >=15min in RH furnace Vacuum Degassing Process, terminal target [H]≤1.0ppm guarantees to feed calcium
It is weak after line to stir the time >=10min；
Further, the control of continuous casting tundish temperature is above 15-25 DEG C in liquidus curve, whole process protection casting, using light pressure
Lower technique；
The heating of plate blank, slab tapping temperature are 1160 DEG C -1200 DEG C.
The 2 rack roughing refers to: being rolled back and forth using 2 rack four-high reversing mills, workpiece thickness control
Between 55-60mm.
The 7 rack finish rolling refers to: carrying out tandem rolling using 7 frame high CVC mills, entrance finishing temperature is controlled in 960-
Within the scope of 1000 DEG C, add up deflection >=60%；Finish rolling finishing temperature is 820-880 DEG C.By adding up large deformation, increase deformation
The intracorporal deformation band of Ovshinsky and dislocation density increase phase transformation nucleation point and refine crystal grain.Using the thermomechanical controlled rolling technique of TMCP,
Do not allow any rack not apply deflection sky mistake, does not use HTP high temperature rolling technique yet.
The section cooling, which refers to, is cooled to 400-500 DEG C with the cooling velocity of 20-30 DEG C/s；
It is described batch refer to be cooled to 400-500 DEG C after batched.
The mechanical property of steel plate of the present invention: horizontal mechanical performance: Rt0.5: 481-531MPa, Rm: 567-655MPa, A50:
34%-38%；Vertical mixing coefficient: Rt0.5: 471-518MPa, Rm: 542-636MPa, A50: 34%-37%；Side knock function
Greater than 300J；CTOD:0.40-0.58mm；The stable mechanical property of finished product, grain size are 10-12 grades, banded structure≤1.0 grade.
The precious alloys such as Ni, Cu, the addition appropriate for reducing the alloying elements such as Nb, V, Ti, Mo, using suitable is not added in the present invention
Hot rolling reduction system and cooling technique give full play to the Strengthening and Toughening effect of alloying element and hot rolling technology, obtain excellent performance
Production cost is reduced simultaneously.The content of the harmful elements such as strict control S, P, H of the present invention, and strictly controlled in smelting process
Metalloid content processed realizes the production control of clean steel.The present invention comes into operation dynamic soft-reduction in continuous casting process, increases slab
The consistency at center reduces center porosity, reduces center segregation of casting blank.
Compared with prior art, the present invention passes through ingredient design, hot rolling technology, microscopic structure and performance control technique.It grinds
The submerged pipeline roll of steel plate for making a kind of excellent in mechanical performance containing very low carbon content, and has extremely low sulfur content
(0.0020% or less) and phosphorus content (0.015% or less), under TMCP process system, adjustment controlled rolling and control bosher
Skill, obtains uniform ferrite+fine pearlite tissue, and material has 10-12 grades of grain size, 1.0 grades of banded structure, low
Non-metallic inclusion, makes it have yield strength higher than 471MPa or more, elongation percentage is greater than 30%, and ballistic work is greater than 300J,
With excellent toughness.
Detailed description of the invention
Fig. 1 is the metallographic structure of submerged pipeline steel produced by the present invention.
Specific embodiment
Below by way of specific embodiment, technical scheme is described further.
According to chemical component provided by the invention requirement, station → LF is finely tuned using molten iron pretreatment → pneumatic steelmaking → alloy
The process that external refining → RH furnace vacuum outgas → continuous casting process is smelted.RH furnace vacuum outgas 15-20min, terminal [H]=
0.5-1.0ppm, feed calcium line after it is weak stir the time be 10-15min.After RH furnace, chemical component meets weight percent in steel
(wt%): C:0.030%-0.070%, Si:0.15%-0.30%, Mn:1.35%-1.65%, Nb:0.030%-
0.060%, V:0.020%-0.040%, Ti:0.010%-0.040%, Mo 0.05%-0.30%, S≤0.0020%, P≤
0.015%, remaining is Fe and inevitable impurity element.Sheet billet continuous casting process carries out full argon for protecting pouring, pouring temperature
At 1538-1553 DEG C, slab slighter compress amount is 5.7mm for control.
The chemical component of various embodiments of the present invention 1-5 is as shown in table 1." carbon steel is with according to GB/T 4336 for composition detection
Low-alloy steel spark source atomic emission spectrometry analysis method (conventional method) " it carries out.
The chemical component of 1 1-5 of the embodiment of the present invention of table
A kind of production method of submerged pipeline steel, method are as follows:
Deep Desulphurization of Hot Metal is de- to S≤0.0050%, converter top bottom blowing, alloy fine tuning, the refining of LF furnace, RH vacuum
It gas, sheet billet continuous casting, heating ,+7 rack finish rolling of 2 rack roughing, section cooling and batches.
1160-1200 DEG C → 2 rack roughing of rolling process slab tapping temperature → 7 rack finish rolling → section cooling → volume
It takes, main rolling technological parameter and the tensile mechanical properties for testing steel are as shown in table 2.
2 rolling process major parameter of table and mechanical property
The V-type ballistic work and CTOD inspection result of present invention test steel are as shown in table 3.
The ballistic work and CTOD value of 3 present invention test steel of table
The results are shown in Table 4 for the examination of nonmetallic inclusion of present invention test steel.
The non-metallic inclusion of 4 present invention test steel of table
In conclusion by embodiment steel obtained by steel grade Design of Chemical Composition range of the present invention and rolling mill practice control technology
Performance: horizontal mechanical performance: Rt0.5: 481-531MPa, Rm: 567-655MPa, A50: 34%-38%；Vertical mixing coefficient:
Rt0.5: 471-518MPa, Rm: 542-636MPa, A50: 34%-37%；Side knock function is greater than 300J；CTOD:0.40-
0.58mm；The stable mechanical property of finished product, grain size are 10-12 grades, banded structure≤1.0 grade.
Claims (4)
1. a kind of submerged pipeline steel, which is characterized in that the submerged pipeline steel chemical composition mass percentage content are as follows: C
0.030%-0.070%, Si 0.15%-0.30%, Mn 1.35%-1.65%, Nb 0.030%-0.060%, V 0.020%-
0.040%, Ti 0.010%-0.040%, Mo 0.05%-0.30%, S≤0.0020%, P≤0.015%, remaining is Fe and can not
The impurity element avoided；
The production method of the submerged pipeline steel, are as follows: Deep Desulphurization of Hot Metal to S≤0.0050%, converter top bottom blowing, alloy
It fine tuning, the refining of LF furnace, RH vacuum outgas, sheet billet continuous casting, heating ,+7 rack finish rolling of 2 rack roughing, section cooling and batches, institute
Heating of plate blank is stated, slab tapping temperature is 1160 DEG C -1200 DEG C；The section cooling refers to the cooling velocity of 20-30 DEG C/s
It is cooled to 400-500 DEG C；
The 2 rack roughing refers to: being rolled back and forth using 2 rack four-high reversing mills, workpiece thickness is controlled in 55-
Between 60mm；
The 7 rack finish rolling refers to: carrying out tandem rolling using 7 frame high CVC mills, entrance finishing temperature is controlled at 960-1000 DEG C
In range, add up deflection >=60%；Finish rolling finishing temperature is 820-880 DEG C.
2. submerged pipeline steel according to claim 1, which is characterized in that when guaranteeing deep degassing in RH furnace Vacuum Degassing Process
Between >=15min, terminal target [H]≤1.0ppm guarantees to feed and weak stirs the time >=10min after calcium line.
3. submerged pipeline steel according to claim 1, which is characterized in that continuous casting tundish temperature controls more than liquidus curve
15-25 DEG C, whole process protection casting, using slighter compress technique.
4. submerged pipeline steel according to claim 1, which is characterized in that it is described batch refer to and be cooled to 400-500 DEG C after
Batched.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810436793.XA CN108504931B (en) | 2018-05-09 | 2018-05-09 | A kind of submerged pipeline steel and its production method |
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| CN201810436793.XA CN108504931B (en) | 2018-05-09 | 2018-05-09 | A kind of submerged pipeline steel and its production method |
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| CN108504931A CN108504931A (en) | 2018-09-07 |
| CN108504931B true CN108504931B (en) | 2019-07-30 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273109A (en) * | 2019-07-30 | 2019-09-24 | 马鞍山钢铁股份有限公司 | A kind of 450MPa grades of submerged pipeline roll of steel plate and preparation method thereof |
| CN110241360B (en) * | 2019-07-30 | 2020-11-03 | 马鞍山钢铁股份有限公司 | Hot rolled steel plate coil for thick-wall large-caliber ERW submarine pipeline and preparation method thereof |
| CN111979497A (en) * | 2020-09-28 | 2020-11-24 | 马鞍山钢铁股份有限公司 | Submarine pipeline steel plate coil with excellent low-temperature CTOD (carbon dioxide optical density) performance and production process thereof |
| CN114480975B (en) * | 2022-02-23 | 2023-02-28 | 马鞍山钢铁股份有限公司 | Economical X65-grade acid-resistant pipeline steel plate coil and manufacturing method thereof |
| CN115261741A (en) * | 2022-07-21 | 2022-11-01 | 重庆钢铁股份有限公司 | Production method of hot-rolled X65 pipeline steel |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6425916A (en) * | 1987-07-21 | 1989-01-27 | Nippon Steel Corp | Manufacture of high-strength steel for electric resistance welded tube excellent in toughness at low temperature |
| CN101514435A (en) * | 2008-12-17 | 2009-08-26 | 马鞍山钢铁股份有限公司 | Pipeline steel with good and stable low-temperature flexibility and method for rolling hot rolled coils thereof |
| CN102021497A (en) * | 2009-09-15 | 2011-04-20 | 鞍钢股份有限公司 | X80 pipeline steel hot-rolled plate coil and manufacturing method thereof |
| CN102534377A (en) * | 2012-02-29 | 2012-07-04 | 首钢总公司 | X70-degree large deformation resisting pipeline steel plate with excellent tenacity and preparation method for pipeline steel plate |
| CN103014497A (en) * | 2012-12-17 | 2013-04-03 | 南京钢铁股份有限公司 | Production method of pipeline steel plate with excellent impact toughness |
| CN103725960A (en) * | 2013-12-28 | 2014-04-16 | 首钢总公司 | Thin high-flexibility pipeline steel plate and production method thereof |
| CN105132807A (en) * | 2015-10-10 | 2015-12-09 | 武汉钢铁(集团)公司 | Pipeline steel excellent in acid corrosion resistance on seabed and production method |
-
2018
- 2018-05-09 CN CN201810436793.XA patent/CN108504931B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6425916A (en) * | 1987-07-21 | 1989-01-27 | Nippon Steel Corp | Manufacture of high-strength steel for electric resistance welded tube excellent in toughness at low temperature |
| CN101514435A (en) * | 2008-12-17 | 2009-08-26 | 马鞍山钢铁股份有限公司 | Pipeline steel with good and stable low-temperature flexibility and method for rolling hot rolled coils thereof |
| CN102021497A (en) * | 2009-09-15 | 2011-04-20 | 鞍钢股份有限公司 | X80 pipeline steel hot-rolled plate coil and manufacturing method thereof |
| CN102534377A (en) * | 2012-02-29 | 2012-07-04 | 首钢总公司 | X70-degree large deformation resisting pipeline steel plate with excellent tenacity and preparation method for pipeline steel plate |
| CN103014497A (en) * | 2012-12-17 | 2013-04-03 | 南京钢铁股份有限公司 | Production method of pipeline steel plate with excellent impact toughness |
| CN103725960A (en) * | 2013-12-28 | 2014-04-16 | 首钢总公司 | Thin high-flexibility pipeline steel plate and production method thereof |
| CN105132807A (en) * | 2015-10-10 | 2015-12-09 | 武汉钢铁(集团)公司 | Pipeline steel excellent in acid corrosion resistance on seabed and production method |
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