CN110106439A - Marine riser X65 hot rolled steel plate and preparation method thereof - Google Patents
Marine riser X65 hot rolled steel plate and preparation method thereof Download PDFInfo
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- CN110106439A CN110106439A CN201910334937.5A CN201910334937A CN110106439A CN 110106439 A CN110106439 A CN 110106439A CN 201910334937 A CN201910334937 A CN 201910334937A CN 110106439 A CN110106439 A CN 110106439A
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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
- C21D8/0221—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
- 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
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/44—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
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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- Heat Treatment Of Steel (AREA)
Abstract
The present invention provides a kind of marine riser X65 hot rolled steel plate and preparation method, chemical ingredients by weight percent are as follows: C:0.03~0.05%, Si:0.10~0.30%, Mn:1.10~1.35%, P :≤0.007%, S :≤0.0008%, Alt:0.01~0.05%, Nb:0.04~0.06%, Ti:0.008~0.018%, Ni:0.20~0.40%, Cr:0.15~0.30%, Mo:0.10~0.20%, N :≤0.004%, surplus is Fe and inevitable impurity element；300~500mm thickness continuous casting billet is used first, rough rolling of steel billets is rolled using differential temperature, finish rolling uses three stage rollings, obtain hardening austenite grain that is tiny, flattening, steel plate is cooled down after rolling, 760~780 DEG C of cold temperature is opened, 200~300 DEG C of final cooling temperature, obtains tiny ferrite and a small amount of acicular ferrite structure.The advantage is that big wall thickness, high intensity, low yield strength ratio, low-temperature flexibility, Resisting fractre, Antacid effectiveness are excellent, the risk that fracture and corrosion occur for marine riser is reduced.
Description
Technical field
The invention belongs to marine riser technical fields, and in particular to a kind of marine riser X65 hot rolled steel plate and its preparation
Method.
Background technique
The booming forward position for promoting marine riser technology to become World Oil Industry scientific and technical innovation of offshore and gas development.
Marine riser is an important component in the construction of Marine oil and gas resource Development Engineering.Currently, the U.S., Japan, Germany, bar
The states such as west, Norway, Italy are in terms of marine riser technology and equipment all in advanced international standard.The exploitation of China's marine riser
It is far below international most advanced level with the ability of laying, the research of marine riser is also at the early-stage.And China sea area is vast, in the South Sea
The deep water sea area in south has about 30,000,000,000 tons of oil and gas reserves.With the fast development of Chinese national economy, country is to the energy
Demand increasingly increases, and promotes deep-sea oil gas resource exploitation by the sustainable development to Chinese national economy, alleviation oil and gas import pressure
It plays a significant role in power and improvement energy resource supply structure.
Marine riser is connected to subsea wellheads and offshore production platform, plays the role of conveying former oil and gas, ocean
Standpipe subjects the strong corrosive and ocean current dynamic load of pumped (conveying) medium.The rupture of marine riser will will cause on fire and explosion,
The life of staff in the safety and platform of ocean platform is threatened, and calamity can bring considerable damage to marine ecology.
Therefore, marine riser steel is very strict to product quality and class requirement, it is desirable that includes: 1, high intensity (yield strength 450N/
mm2)；2, high tenacity (- 40 DEG C)；3, increase wall thickness (34-50mm)；4, break resistance (CTOD)；5, anti-crack arrest characteristic
(DWTT)；6, low yield strength ratio (Y/T≤0.89)；7, acid-resisting corrosive nature (HIC, SSCC)；8, excellent welding performance.
The development Experience of domestic big wall thickness marine riser X65 hot rolled steel plate not yet, current long-distance transport pipes X65 product
The technical requirements of marine riser are still not achieved, are unable to satisfy the demand of Marine oil and gas resource exploitation engineering construction.Therefore, China south
The exploitation bottleneck of extra large Marine oil and gas resource is big wall thickness marine riser X65 hot rolled steel plate success exploitation.
Summary of the invention
In view of this, the present invention provides a kind of marine riser X65 hot rolled steel plate and preparation method thereof, solve 34~
The big wall thickness steel plate of 50mm obtains the problem of high intensity, low yield strength ratio, low-temperature flexibility, Resisting fractre, easy welding, acid-resisting corrosion.It is suitable
For the construction of ocean deepwater petroleum, natural gas extraction engineering standpipe, significantly reduces marine riser and fracture and corrosion occurs
Risk.
First aspect present invention provides a kind of marine riser X65 hot rolled steel plate, by percentage to the quality, the steel plate
Chemical analysis includes: C:0.03~0.05%, Si:0.10~0.30%, Mn:1.10~1.35%, P :≤0.007%, S :≤
0.0008%, Alt:0.01~0.05%, Nb:0.04~0.06%, Ti:0.008~0.018%, Ni:0.20~0.40%,
Cr:0.15~0.30%, Mo:0.10~0.20%, N :≤0.004%, surplus is Fe and inevitable impurity element.
Chemical composition and the content proportion of marine riser X65 hot rolled steel plate directly affect properties of product, in which:
C element improves the strength character of material by solution strengthening, if when C content is less than 0.03wt%, intensive properties
Can be horizontal relatively low, when C content is greater than 0.05wt%, Antacid effectiveness, low-temperature flexibility and weld horizontal are relatively low.Therefore in the present invention
C content controls within the scope of 0.03~0.05wt%.A large amount of test proves that C content is controlled in 0.03~0.05wt% range
It is interior, can just obtain close limit strength character control and stable -40 DEG C DWTT, CTOD performance and acid-resisting HIC,
SSCC performance.
Mn element can significantly improve strength character, and Mn content is too low, and the tensile strength of material is inadequate, and Mn content is too high,
Antacid effectiveness, low-temperature flexibility reduce.Therefore, the present invention is obtained by a large number of experiments, and Mn is controlled in 1.10~1.35wt% range,
Not only guarantee the strength level of material, but also do not deteriorate Antacid effectiveness and low-temperature flexibility.A large amount of test proves that the control of Mn content exists
Within the scope of 1.10~1.35wt%, DWTT, CTOD performance and acid-resisting HIC, SSCC performance of stable -40 DEG C can be just obtained.
P, S element is impurity element in steel, and easily segregation, influences continuous casting billet internal soundness, the lower P, S content the better, is
The good low-temperature flexibility of acquisition, Antacid effectiveness and welding performance, the present invention have carried out a large number of experiments, discovery impurity element control
In P :≤0.007wt%, S :≤0.0008wt%, can just obtain stable -40 DEG C DWTT, CTOD performance and acid-resisting HIC,
SSCC performance.
Nb member is known as solution strengthening and refines the effect of crystal grain, thus in the present invention control of Nb content 0.04~
Within the scope of 0.06wt%.
Ti element has carried out a large number of experiments in the present invention, discovery: when Ti content is greater than 0.018wt%, particle size
Biggish TiN particle will affect low-temperature flexibility and Antacid effectiveness of material etc..Therefore in the present invention control of Ti content 0.008~
Within the scope of 0.018wt%, low-temperature flexibility, welding performance and Antacid effectiveness are best.
Ni element is stabilization of austenite element, can reduce γ → α transition temperature, and the low temperature that can effectively improve pipe line steel is tough
Property.Ni can improve the intensity of steel by solution strengthening effect, make up in think gauge steel because under intensity caused by the increase of thickness
Drop.Ni alloy is most importantly added, can be further improved the intensity and low-temperature flexibility of steel.But excessive Ni will increase dramatically
Cost.Therefore, the present invention has carried out a large number of experiments, and discovery controls the obdurability within the scope of 0.20~0.40wt% when Ni content
It is best with economy.
Mo element increases harden ability, improves the structural homogenity of big wall thickness steel plate thickness direction, improves low-temperature flexibility, can be with
Tensile strength is improved, yield tensile ratio, the intensity and toughness levels of stabilizing material are reduced.But the present invention has carried out a large number of experiments, discovery:
When Mo content is greater than 0.20%, it may appear that excessive hard phase constitution and the island M/A etc. influence Antacid effectiveness.Therefore, when Mo content control
System is within the scope of 0.10~0.20wt%, steel plate structural homogenity, intensity homogeneity, low yield strength ratio, low-temperature flexibility and antiacid
HIC, SSCC best performance.
Cr element is that effectively, can significantly reduce the yield tensile ratio of material to the tensile strength for improving pipe line steel.But it is higher
Cr content can be to welding performance and antiacid unfavorable.The present invention has carried out a large number of experiments, when Cr content is controlled 0.15~0.30%
In range, strength character, yield tensile ratio, welding performance and Antacid effectiveness are best.
Preferably, marine riser X65 hot rolled steel plate microstructure is tiny and uniform ferritic structure, wherein
Including 1~8% acicular ferrite structure of volumn concentration, ferrite grain size≤5 μm.
Preferably, marine riser X65 hot rolled steel plate thickness specification is 34~50mm.
More preferred, the mechanical property of above-mentioned marine riser X65 hot rolled steel plate are as follows: steel plate transverse yield strength: 450
~550MPa, tensile strength: 535~650MPa；Steel plate longitudinal direction yield strength: 440~550MPa, tensile strength: 535~
650MPa, elongation after fracture A50 >=30%, yield tensile ratio≤0.89；- 40 DEG C of Charpy-V impact powers of steel plate thickness central cross >=
400J, impact shear area >=90%；- 40 DEG C of steel plate are thinned the DWTT sample section of shear >=85% that drops hammer；At -40 DEG C of steel plate
CTOD value is in 0.40mm or more；Hardness HV10≤230；According to NACE standard, under the conditions of solution A, HIC crack length rate CLR≤
10%, crack thickness rate CTR≤3%, crack-sensitivity rate CSR≤1%, no SSCC crackle.
Second aspect of the present invention provides the preparation method of above-mentioned marine riser X65 hot rolled steel plate, and step includes:
S1, continuous casting obtain meeting the high-cleanness of chemical component requirement, special thick continuous casting billet, and thickness of strand is 300~
500mm, at 0.5 grade of C class, A/B/C/D class non-metallic inclusion is controlled within 1.5 grades for center segregation control；
S2, using differential temperature rolling and big soft reduction process roughing, sufficiently refine center portion crystal grain；
S3, finish rolling use three stage rollings, obtain the austenite grain for flattening hardening, reduce the temperature control time, refine
Austenite grain provides more nucleation points for subsequent ferrite transformation；
S4, steel plate roller repairing, open 760~780 DEG C of cold temperature, and final cooling temperature is 200~300 DEG C.
In the above preparation method, high-cleanness, special thick continuous casting billet are used, a large number of experiments show that, it is strictly controlled by step S1
Thickness of strand processed, center segregation, non-metallic inclusion are the premises for producing marine riser X65 hot rolled steel plate, available steady
DWTT, CTOD performance and acid-resisting HIC, SSCC performance of fixed -40 DEG C.
The differential temperature rolling mill practice that roughing uses can make billet surface form hardening at subcritical temerature layer, and steel billet center portion high temperature deformation
Drag is small, keeps rolling deformation fully penetrated to center portion, refines center portion crystal grain, improve the intensity and ultralow-temperature flexibility of center portion；Due to
Big wall thickness steel plate center portion is often weak location, differential temperature rolling mill practice and big soft reduction process of the invention, can make lacking for center portion
Sufficiently healing is fallen into, and refines center portion crystal grain, big wall thickness steel plate thickness section structure uniformity is improved, improves the comprehensive of center portion
Can, obtain DWTT, CTOD performance and acid-resisting HIC, SSCC performance of stable -40 DEG C.
The finish rolling stage uses three stage rollings, and advantage is: improving production efficiency, avoids high temperature time of staying temperature too long；Carefully
Change crystal grain, high temperature is avoided to wait for that thermophase crystal grain is grown up；The austenite grain for sufficiently flattening hardening is obtained, it is brilliant for subsequent phase transformation refinement
Grain provides more nucleation points；The strength character of available close limit controls and -40 DEG C stable DWTT, CTOD
It can be with acid-resisting HIC, SSCC performance.
Steel plate is cooled down after rolling, and obtains tiny ferrite and a small amount of acicular ferrite structure, ferrite grain size
≤5μm；Strength character control, lower yield tensile ratio and -40 DEG C stable DWTT, CTOD of available close limit
It can be with acid-resisting HIC, SSCC performance.
Preferably, in step S2, the differential temperature rolling mill practice makes billet surface temperature lower than center portion temperature 100~200
DEG C, keep rolling deformation fully penetrated to center portion, refines center portion crystal grain.Specifically, can by spray high pressure water to billet surface into
Row cooling, in steel billet thickness x cross sectional formation temperature gradient.
Preferably, in step S2, in the big soft reduction process: single pass rolling reduction is up to 40~50mm, sufficiently refines
Center portion crystal grain.
Preferably, in step S3, the finish rolling uses three stage rollings, and first stage start rolling temperature is 900~930 DEG C,
To temperature after 3~5 passages of rolling；Second stage start rolling temperature is 840~860 DEG C, to temperature after 2~3 passages of rolling；Phase III opens
Rolling temperature is 800~820 DEG C, and finishing temperature is 780~800 DEG C, obtains the austenite grain for sufficiently flattening hardening.
Compared with prior art, the invention has the following advantages that
The present invention realizes high-intensitive, close limit (≤100MPa) intensive properties under the premise of 34~50mm big wall thickness
It can control, the control of lower yield tensile ratio and stable -40 DEG C of DWTT, CTOD performance and the performance control of acid-resisting HIC, SSCC
System significantly reduces the risk that fracture and corrosion occur for marine riser, has a good application prospect.
Detailed description of the invention
Fig. 1 is the center segregation figure (0.5 grade of C class) of marine riser of the present invention X65 continuous casting billet.
Fig. 2 is the metallographic structure figure of marine riser of the present invention X65 hot rolled steel plate, wherein a is the metallographic structure on surface layer
Figure, b are the metallographic structure figure of center portion.
Fig. 3 is the scanning organization chart of marine riser of the present invention X65 hot rolled steel plate, wherein a is the scanning tissue on surface layer
Figure, b are the scanning organization chart of center portion.
Specific embodiment
To facilitate the understanding of the present invention, present invention work more comprehensively, is meticulously described below in conjunction with embodiment, but this hair
Bright protection scope is not limited to embodiment in detail below.
Unless otherwise defined, all technical terms used hereinafter and the normally understood meaning of those skilled in the art
It is identical.Technical term used herein is intended merely to the purpose of description specific embodiment, is not intended to the limitation present invention
Protection scope.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention, can pass through
Market is commercially available or can be prepared by existing method.
Below in conjunction with five specific embodiments to marine riser provided by the invention X65 hot rolled steel plate and its preparation side
Method is described in detail.
Embodiment 1
A kind of preparation method of marine riser X65 hot rolled steel plate is present embodiments provided, step includes:
1) continuous casting obtains meeting the high-cleanness of chemical component requirement, special thick continuous casting billet, and center segregation is controlled at 0.5 grade of C class,
A/B/C/D class non-metallic inclusion controls within 1.5 grades, and thickness of strand and specific chemical composition are as shown in table 1, continuous casting billet
Center segregation control is good, as shown in Figure 1；
2) rough rolling step uses differential temperature rolling mill practice, is cooled down by spraying high pressure water to billet surface, in steel billet thickness
Section formation temperature gradient keeps rolling deformation fully penetrated to steel billet center portion, carefully so that billet surface temperature is lower than center portion temperature
Change center portion crystal grain；
3) rough rolling step sufficiently refines center portion crystal grain using big pressure；
4) the finish rolling stage use three stage rollings, the first stage roll 4 passages after to temperature；After second stage rolls 2 passages
To temperature；Phase III rolling is carried out again, obtains the austenite grain for sufficiently flattening hardening.
5) it is cooled down after steel plate rolls, obtains tiny ferrite and a small amount of acicular ferrite structure, ferrite crystal grain ruler
It is very little≤5 μm.
The concrete technology condition being related in above-mentioned technical process is as shown in table 2, and the process conditions include: continuous casting billet
Thickness, center segregation grade, non-metallic inclusion grade, differential temperature rolling in surface and the center portion temperature difference, rough rolling step single pass pressure
Lower maximum value, the start rolling temperature of finish rolling three phases and the finishing temperature of phase III, roller repairing open cold temperature and eventually it is cold
Temperature.
In above-mentioned technique, key process parameter is listed in table 2, other technological parameters being related in preparation process
And details is handled according to common process known to technical staff, details are not described herein again.
The marine riser that above-mentioned technique is prepared X65 hot rolled steel plate, thickness specification are 34~50mm, steel plate surface layer
Good with the structural homogenity of center portion, as shown in Fig. 2 and 3, carrying out Mechanics Performance Testing, the results are shown in Table 3.Steel plate is hard
Spend HV10≤230；According to NACE standard, under the conditions of solution A, the antiacid HIC cracking breakout of steel plate is 0.
Embodiment 2-5
Invention further provides embodiment 2-5, embodiment 2-5 each provides a kind of marine riser X65 hot rolling
The preparation method of steel plate, specific steps and embodiment 1 are almost the same, using 400mm continuous casting billet, the control of continuous casting billet center segregation
Well, then continuous casting billet passes through the processes such as roughing, the finish rolling of three stages, cooling, tiny, the uniform ferrite of steel plate acquisition+a small amount of
The structural homogenity of the tissue of acicular ferrite, steel plate surface layer and center portion is good.The difference from embodiment 1 is that the chemistry of steel plate
Component and some processes parameter, it is specific as shown in Table 1 and Table 2.
The marine riser that embodiment 2-5 is obtained is tested for the property with X65 hot rolled steel plate and the pipeline being prepared, is tied
Fruit is as shown in table 3, and the mechanical property and embodiment 1 of embodiment 2-5 product are almost the same, shows high-intensitive, narrow strength range
(≤40MPa), low yield strength ratio (≤0.85), -40 DEG C of stable DWTT, CTOD performances and acid-resisting HIC, SSCC performance (crackle
0) rate is.
1 steel plate chemical component table (wt%) of table
Chemical composition content is weight percentage in table 1, and surplus is Fe and inevitable impurity element.
2 preparation technology parameter table of table
3 product mechanical property table of table
Many experimental results of the present invention show steel plate chemical component, preparation process to product microscopic structure and mechanical property
Most important, under the premise of 34~50mm big wall thickness, the present invention realizes high-intensitive, close limit (≤40MPa) intensive properties
It can control, the control of lower yield tensile ratio and stable -40 DEG C of DWTT, CTOD performance and the performance control of acid-resisting HIC, SSCC
System, and steel plate, in downstream user manufacturing process, machinability and weldability are excellent, and yield tensile ratio control is good before and after tubulation
It is good, do not occur that yield tensile ratio is exceeded and the relatively low problem of sweating heat low temp area toughness, final marine riser product are all satisfied standard requirements.
The present invention is suitable for offshore oil, natural gas extraction engineering standpipe, reduces marine riser and fracture and corruption occurs
The risk of erosion.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (8)
1. a kind of marine riser X65 hot rolled steel plate, it is characterised in that: by percentage to the quality, the steel plate chemical analysis packet
It includes: C:0.03~0.05%, Si:0.10~0.30%, Mn:1.10~1.35%, P :≤0.007%, S :≤0.0008%,
Alt:0.01~0.05%, Nb:0.04~0.06%, Ti:0.008~0.018%, Ni:0.20~0.40%, Cr:0.15~
0.30%, Mo:0.10~0.20%, N :≤0.004%, surplus is Fe and inevitable impurity element.
2. marine riser as described in claim 1 X65 hot rolled steel plate, it is characterised in that: the steel plate microstructure is thin
Small and uniform ferritic structure, including 1~8% acicular ferrite structure of volumn concentration, the ferrite crystal grain
Size≤5 μm.
3. marine riser as described in claim 1 X65 hot rolled steel plate, it is characterised in that: the steel plate thickness specification is 34
~50mm.
4. the marine riser X65 hot rolled steel plate as described in any one of claim 1-3 claim, it is characterised in that: described
Marine riser X65 hot rolled steel plate mechanical property are as follows: steel plate transverse yield strength: 450~550MPa, tensile strength: 535
~650MPa；Steel plate longitudinal direction yield strength: 440~550MPa, tensile strength: 535~650MPa, elongation after fracture A50 >=
30%, yield tensile ratio≤0.89；- 40 DEG C of Charpy-V impact power >=400J of steel plate thickness central cross, impact shear area >=90%；Steel
- 40 DEG C of plate are thinned the DWTT sample section of shear >=85% that drops hammer；CTOD value is in 0.40mm or more at -40 DEG C of steel plate；Hardness HV10
≤230；According to NACE standard, under the conditions of solution A, HIC crack length rate CLR≤10%, crack thickness rate CTR≤3%, crackle
Sensitivity rate CSR≤1%, no SSCC crackle.
5. the marine riser described in claim 1 preparation method of X65 hot rolled steel plate, step include:
S1, using continuous casting process, thickness of strand is 300~500mm, and center segregation is controlled at 0.5 grade of C class, and A/B/C/D class is non-
Metallic inclusion controls within 1.5 grades, obtains the continuous casting billet for meeting chemical component requirement；
S2, using differential temperature rolling and big soft reduction process roughing, sufficiently refine center portion crystal grain；
S3, three stage rolling of finish rolling obtain the austenite grain for flattening hardening；
S4, steel plate roller repairing, open 760~780 DEG C of cold temperature, and final cooling temperature is 200~300 DEG C.
6. the marine riser as claimed in claim 5 preparation method of X65 hot rolled steel plate, it is characterised in that: in step S2, institute
Stating differential temperature rolling mill practice makes billet surface temperature 100~200 DEG C lower than center portion temperature.
7. the marine riser as claimed in claim 5 preparation method of X65 hot rolled steel plate, it is characterised in that: in step S2, institute
State in big soft reduction process: single pass rolling reduction is up to 40~50mm.
8. the preparation method of X65 hot rolled steel plate of marine riser described in claim 5, it is characterised in that: described in step S3
Finish rolling uses three stage rollings, and first stage start rolling temperature is 900~930 DEG C, to temperature after 3~5 passages of rolling；Second stage is opened
Rolling temperature is 840~860 DEG C, to temperature after 2~3 passages of rolling；Phase III start rolling temperature is 800~820 DEG C, and finishing temperature is
780~800 DEG C.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111286675A (en) * | 2020-03-31 | 2020-06-16 | 湖南华菱湘潭钢铁有限公司 | Production method of X80 hot rolled steel plate for large-caliber hot-bending pipe |
| CN111534748A (en) * | 2020-05-11 | 2020-08-14 | 首钢集团有限公司 | Hot rolled steel plate for submarine conveying pipe and preparation method thereof |
| CN111607747A (en) * | 2020-07-01 | 2020-09-01 | 武汉科技大学 | Hydrogen sulfide corrosion resistant X70 grade pipeline steel for seabed and production method thereof |
| CN112195409A (en) * | 2020-09-30 | 2021-01-08 | 首钢集团有限公司 | High-strength low-hardness hydrogen sulfide corrosion resistant steel and preparation method thereof |
| CN114657458A (en) * | 2022-02-18 | 2022-06-24 | 山东钢铁集团日照有限公司 | Crude oil storage tank steel plate for large-thickness high-strength high-toughness high-heat input welding and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001032041A (en) * | 1999-07-26 | 2001-02-06 | Kawasaki Steel Corp | High strength hot rolled steel plate excellent in workability, and its manufacture |
| US6248191B1 (en) * | 1997-07-28 | 2001-06-19 | Exxonmobil Upstream Research Company | Method for producing ultra-high strength, weldable steels with superior toughness |
| CN102994876A (en) * | 2012-12-21 | 2013-03-27 | 首钢总公司 | Hot-rolled steel plate for oil-gas pipeline compression station and production method thereof |
| CN106544587A (en) * | 2016-10-26 | 2017-03-29 | 首钢总公司 | The big wall thickness deep-sea pipeline hot rolled steel plate of continuous casting billet and its production method |
| CN107604259A (en) * | 2017-08-31 | 2018-01-19 | 包头钢铁（集团）有限责任公司 | A kind of X70 line steel hot rollings coiled sheet and its production method |
| CN108315649A (en) * | 2018-04-02 | 2018-07-24 | 首钢集团有限公司 | Continuous casting billet produces big wall thickness ultralow temperature pipe fitting steel plate and preparation method thereof |
-
2019
- 2019-04-24 CN CN201910334937.5A patent/CN110106439B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6248191B1 (en) * | 1997-07-28 | 2001-06-19 | Exxonmobil Upstream Research Company | Method for producing ultra-high strength, weldable steels with superior toughness |
| JP2001032041A (en) * | 1999-07-26 | 2001-02-06 | Kawasaki Steel Corp | High strength hot rolled steel plate excellent in workability, and its manufacture |
| CN102994876A (en) * | 2012-12-21 | 2013-03-27 | 首钢总公司 | Hot-rolled steel plate for oil-gas pipeline compression station and production method thereof |
| CN106544587A (en) * | 2016-10-26 | 2017-03-29 | 首钢总公司 | The big wall thickness deep-sea pipeline hot rolled steel plate of continuous casting billet and its production method |
| CN107604259A (en) * | 2017-08-31 | 2018-01-19 | 包头钢铁（集团）有限责任公司 | A kind of X70 line steel hot rollings coiled sheet and its production method |
| CN108315649A (en) * | 2018-04-02 | 2018-07-24 | 首钢集团有限公司 | Continuous casting billet produces big wall thickness ultralow temperature pipe fitting steel plate and preparation method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111286675A (en) * | 2020-03-31 | 2020-06-16 | 湖南华菱湘潭钢铁有限公司 | Production method of X80 hot rolled steel plate for large-caliber hot-bending pipe |
| CN111534748A (en) * | 2020-05-11 | 2020-08-14 | 首钢集团有限公司 | Hot rolled steel plate for submarine conveying pipe and preparation method thereof |
| CN111607747A (en) * | 2020-07-01 | 2020-09-01 | 武汉科技大学 | Hydrogen sulfide corrosion resistant X70 grade pipeline steel for seabed and production method thereof |
| CN112195409A (en) * | 2020-09-30 | 2021-01-08 | 首钢集团有限公司 | High-strength low-hardness hydrogen sulfide corrosion resistant steel and preparation method thereof |
| CN114657458A (en) * | 2022-02-18 | 2022-06-24 | 山东钢铁集团日照有限公司 | Crude oil storage tank steel plate for large-thickness high-strength high-toughness high-heat input welding and preparation method thereof |
| CN116555670A (en) * | 2023-06-02 | 2023-08-08 | 钢铁研究总院有限公司 | Anti-fatigue steel for marine riser and preparation method thereof |
| CN116555670B (en) * | 2023-06-02 | 2024-03-05 | 钢铁研究总院有限公司 | Anti-fatigue steel for marine riser and preparation method thereof |
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