CN109957709A - One kind X70M Pipeline Steel Plate of large deformation containing V and its manufacturing method - Google Patents

One kind X70M Pipeline Steel Plate of large deformation containing V and its manufacturing method Download PDF

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Publication number
CN109957709A
CN109957709A CN201711333513.4A CN201711333513A CN109957709A CN 109957709 A CN109957709 A CN 109957709A CN 201711333513 A CN201711333513 A CN 201711333513A CN 109957709 A CN109957709 A CN 109957709A
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temperature
cooling
steel plate
steel
large deformation
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CN109957709B (en
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刘文月
任毅
张帅
王爽
高红
应传涛
徐烽
渠秀娟
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Angang Steel Co Ltd
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Angang Steel Co Ltd
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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
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • 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
    • 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
    • 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
    • C21D2211/002—Bainite
    • 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

Abstract

The present invention provides a kind of X70M Pipeline Steel Plates of large deformation containing V, the ingredient of the steel plate is as follows by weight percentage: C 0.02%-0.09%, Si 0.05%-0.40%, Mn1.35%-1.75%, Cu 0.05%-0.35%, Cr 0.05%-0.35%, Ni 0.05%-0.35%, Mo 0.05%-0.35%, Nb 0.010%-0.035%, V 0.01%-0.07%, Ti0.010%-0.025%, Al 0.01%-0.04%, P≤0.010%, S≤0.005%, remaining is Fe and several inevitable impurity elements.Manufacturing method includes converter or electric furnace smelting, external refining, casting, slab reheating, controlled rolling, control cooling, production cost is significantly reduced using the present invention, the steel plate can satisfy every mechanical property requirements of large deformation X70M steel pipe after tubulation, and low-temperature flexibility is especially good.

Description

One kind X70M Pipeline Steel Plate of large deformation containing V and its manufacturing method
Technical field
The invention belongs to metal material fields, more particularly to a kind of X70M grades of effective heat of conveying oil-gas pipeline of large deformation containing V Rolled steel plate and its manufacturing method.
Background technique
As petroleum resources demand increasingly increases, the investment construction of new oil gas field gradually increases.Due to the production of oil gas Ground and area of consumption generally require to pass through the geological conditions such as permafrost band, earthquake zone badly regional, it is therefore desirable to long oil/gas pipe Road meets the requirement based on stress design: the lateral performance of steel pipe meets traditional requirement based on stress design, longitudinal performance Feature with anti-large deformation.Characterize anti-large deformation feature typical performance parameter be yield tensile ratio it is low (such as Rt0.5/Rm≤ 0.80), uniform elongation is high (such as uEL >=10%).
In order to reach based on property of resisting large deformation needed for stress design, there are two types of means: 1) using thick walled steel tube；2) it adopts With the Plate Production steel pipe of duplex structure.In actual application, both methods is not isolated.If only with wall is increased Thick mode improves anti-large deformation ability, and steel plate thickness is often especially thick, and industrialized production difficulty is big and cost of investment is high.Base In this, high deformability steel pipe has the characteristics that heavy wall and two-phase simultaneously at present.
Currently, production large deformation pipeline heavy wall dual phase sheet steel, there are two types of process routes, first is that controlled rolling and controlled cooling (TMCP) is warm afterwards The state supply of material is rolled, is reused after being heat-treated one is the steel plate after controlled rolling and controlled cooling.The latter because of the process that increases heat treatment, Production cost is increased, cost performance is bad.And come carefully using the technology that the production of TMCP technique generally requires to carry out the big pressure of low temperature Change crystal grain, for increasing low-temperature flexibility.The big pressure of low temperature is very big to the load of milling train, when producing Wide and Thick Slab by many limits System.
In order to overcome these technological deficiencies, the present invention passes through completely new ingredient design and matching controlled rolling and controlled cooling work Skill realizes the production and application for meeting the hot rolled heavy plate of X70M large deformation steel pipe requirement.
Currently, still rare using the open source literature of TMCP mode and addition V element production large deformation pipe line steel.
Patent document document " a kind of X80 level large-deformation resistance pipe line steel plate and its manufacturing method " (CN201410480781.9) A kind of X80 level large-deformation resistance pipe line steel plate and its manufacturing method are disclosed, this method uses the water-cooling process of 2 different cooling speeds, Increase the process complexity and production cost of water cooling stage.
Invention " a kind of production method of large-deformation-resistance pipeline steel " (CN201510338315.1) has disclosed a kind of anti-big The production method for deforming pipe line steel, because it needs to use heat treatment process, so high production cost.
Production technology disclosed in invention " a kind of production technology of X70 dual phase steel " (US5545270A) needs to carry out for three stages Controlled rolling can be only achieved the performance characteristic of large deformation, and three stage rollings load milling train big.
Two stages water cooling, the controlled rolling of three stages and heat treatment are all the deficiencies at present in the pipe line steel of two-phase containing V production technology Place, in order to overcome these deficiencies, the present invention realizes X70M large deformation pipeline Wide and Thick Slab high performance-price ratio using TMCP technique Production and application.
Summary of the invention
It is an object of the invention to overcome the above problem and insufficient and providing one kind can guarantee that complicated geology area is laid with Transportation pipe spool safety appliance have the X70M Pipeline Steel Plate of large deformation containing V and its manufacturing method of good strain resistant ability, Realize the high performance-price ratio production for meeting the pipeline X70M large deformation steel plate of the purposes such as high-pressure delivery natural gas, petroleum.
What the object of the invention was realized in:
A kind of X70M Pipeline Steel Plate of large deformation containing V, which is characterized in that the ingredient of the steel plate is as follows by weight percentage: C 0.02%-0.09%, Si 0.05%-0.40%, Mn 1.35%-1.75%, Cu 0.05%-0.35%, Cr 0.05%- 0.35%, Ni 0.05%-0.35%, Mo 0.05%-0.35%, Nb 0.010%-0.035%, V 0.01%-0.07%, Ti 0.010%-0.025%, Al 0.01%-0.04%, P≤0.010%, S≤0.005%, remaining for Fe and it is several not Evitable impurity element.
It is as follows that present component designs reason:
C: most economical in steel, most basic intensified element has the intensity for improving steel by solution strengthening and precipitation strength Obvious effect, but raising C content has negative effect to the plasticity, toughness and weldability of steel.For this purpose, the present invention is by C content range It is set as 0.02%-0.09%.
Si:Si has the function of deoxidation in steel making and improves matrix strength.If Si is excessive, it is welding heat affected base material to be reduced The toughness in area deteriorates field welding procedure performance；The content for improving Si, can purify ferrite, reduce the content of pearlite, have Conducive to the Bauschinger effect for reducing basis material.Therefore, Si content is set as 0.05%-0.40% in the present invention.
Mn: improving the intensity of steel by solution strengthening, is to compensate to cause loss of strength because C content reduces in pipe line steel Main and most economical intensified element.Mn helps to obtain tiny low temperature phase change product, and the toughness of steel can be improved.Improve Mn Content, continuous casting billet center segregation can be aggravated, be unfavorable for the raising of steel plate low-temperature flexibility.Therefore, Mn content range of the invention It is designed as 1.35%-1.75%.
Nb:Nb is one of most important element in modern microalloying pipe line steel, and Grain Refinement Effect is obvious.Nb can make The operation of rolling of steel is completed in higher temperature range, to reduce steel plate internal stress, reduces the close of high-temperature product Dislocations Degree is beneficial to the strain-aging performance for reducing material.The present invention chooses Nb content range 0.010%-0.035%.
V:V is compared with Nb, and precipitation strength effect is more preferable, and Precipitation Temperature is lower, can make up high temperature rolling to the strength of materials Adverse effect, improve the matching degree of strength and toughness；The solution strengthening of V and its carboritride are precipitated on ferrite matrix Afterwards, its yield strength can be improved under the premise of not appreciably affecting ferrite uniform extension property；Excessive V will increase company It casts process and controls difficulty.The present invention chooses Nb content range V content range 0.01%-0.07%.
Ti: being strong solid N element, exists in the form of TiN in sheet billet continuous casting.Tiny TiN particle can effectively inhibit Austenite Grain Growth when slab reheats helps to improve solid solubility of the Nb in austenite, improves welding heat affected zone Impact flexibility.When Ti additive amount is more than certain certain value, TiN particle will be roughened, and promote the stress collection of granular boundary and matrix Middle level.Therefore, the present invention chooses Ti content range 0.010%-0.025%.
Al: usually as deoxidier in steel, if forming AlN, there are also the effects of thinning microstructure.When the content of Al is more than 0.04%, excessive alumina inclusion can reduce the cleanliness of steel.The too low then deoxidation of Al content is insufficient, the oxidizable element such as Ti It just will form oxide, therefore the content lower limit set of Al is 0.01%.
Cr, Mo, Cu, Ni:Cr, Mo are the essential elements for postponing ferrite and being formed, acicular ferrite being promoted to be formed, to control Phase-change organization plays an important role, and is added under certain cooling condition and finishing temperature, can get apparent acicular ferrite and Bainite structure is conducive to the reasonably combined of intensity, plasticity and toughness.And Cu, Ni are to improve steel by solution strengthening effect Intensity, while Cu can also improve the corrosion resistance of steel, the addition of Ni mainly improves low-temperature flexibility, while reducing Cu institute in steel Caused hot-short tendency.For this 4 kinds of alloying elements, it is 0.05%-0.35% that the present invention, which chooses identical content range,.
P, S: being inevitable impurity element in steel, it is desirable to more lower better.The considerations of for smelting cost, and cannot nothing What is limited is low.Therefore, P, S upper content limit are set as 0.010% and 0.005% by the present invention.
The two of technical solution of the present invention are to provide a kind of manufacturing method of the X70M of large deformation containing V Pipeline Steel Plate, including converter Or electric furnace smelting → external refining → casting → slab reheating → controlled rolling → control is cooling,
(1) slab reheats: steel billet is reheated after cleaning, and steel billet tapping temperature is controlled in 1150-1220 ℃。
(2) controlled rolling:
The single pass of roughing finishing temperature Trf >=1000 DEG C, single pass heavy deformation ε=5%-19%, last three passage becomes Shape amount ε '=12%-19%；Intermediate temperature control plate blank thickness t '=2.5t-4.0t, t are finished steel plate thickness；Finish rolling start rolling temperature Tfs =800 DEG C -900 DEG C, Tff=720 DEG C -820 DEG C of finish rolling finishing temperature.
(3) control cooling:
Cold temperature Tcs, final cooling temperature Tcf selection gist cooling water temperature Tw are opened,
If when cooling water temperature Tw≤15 DEG C, open ± 20 DEG C of Tcs=690 DEG C of cold temperature, Tcf=350 DEG C of final cooling temperature ± 20 DEG C, cooling velocity is controlled in 15-24 DEG C/s；
If when cooling water temperature Tw >=20 DEG C, open ± 20 DEG C of Tcs=740 DEG C of cold temperature, Tcf=270 DEG C of final cooling temperature ± 20 DEG C, cooling velocity is controlled in 15-24 DEG C/s；
If at 15 DEG C 20 DEG C of < of < cooling water temperature Tw, opening ± 20 DEG C of Tcs=715 DEG C of cold temperature, final cooling temperature Tcf= 310 DEG C ± 20 DEG C, cooling velocity is controlled in 15-24 DEG C/s.
It finally obtains to obtain the heterogeneous structure based on ferrite, bainite of fine uniform.
According to cooling temperature, selectively to open cold temperature matched with final cooling temperature using different, is because of different Under the conditions of water cooling temperature, the intensity of cooling of steel plate is different.Low cooling water temperature, steel plate intensity of cooling is high, needs using lower Open cold temperature, higher final cooling temperature, adjust steel plate and be in medium cooling path.High cooling water temperature, steel plate are cold But strength reduction, needs the cooling path of steel plate being transferred to higher state and can be only achieved desired effect.
It is composite micro-alloyed to use the low manganese of low-carbon, Nb, V, Ti for performance needed for meeting large deformation X70M by the present invention Change, control Mo, Cr alloying of tissue and be suitably added the ingredient design of Cu, Ni；Continuous casting billet production uses pure steel smelting Technology and high-quality slab production technology；Two-stage control rolling technique is used during Plate Production, in the stage Between base with a thickness of 2.5-4.0 times of final steel plate thickness；Steel plate roll after in laminar cooling process, using specified temperature range Cooperate corresponding cooling velocity, obtains the microscopic structure knot based on bainite (including acicular ferrite), polygonal ferrite Structure has the matching of good obdurability and property of resisting large deformation.
The beneficial effects of the present invention are:
(1) using the low Mn of low C, the ingredient design of the low-carbon-equivalent of compound addition Cu, Ni, Cr, Mo significantly reduces life Produce cost；
(2) using the method for two-stage control rolling, in deformation process, using suitable deformation temperature and deflection, make Austenite grain is effectively refined；Intermediate base is air-cooled to thermophase, Niobium Carbonitride effectively pin austenite grain boundary, crystal grain Dimensional stability is good；After ferrite is precipitated, the solid solution of vanadium and the precipitation of vanadium carbonitride, which realize, is not reducing uniform extension In the case where improve intensity；
(3) after finish to gauge, section cooling is carried out to steel plate, is obtained based on bainite (including acicular ferrite), ferrite Composite microstructure structure；
(4) steel plate after section cooling is air-cooled to room temperature, can satisfy every power of large deformation X70M steel pipe after tubulation Performance requirement is learned, low-temperature flexibility is especially good.
(5) ingredient design and craft system as above is used, steel plate horizontal mechanical performance can achieve following requirement: surrender Intensity Rt0.5 is 420-520MPa, and tensile strength Rm is 590-670MPa, yield tensile ratio Rt0.5/Rm≤0.85, -30 DEG C of ballistic works CVN >=200J, -20 DEG C of DWTT section of shear SA >=85%, HV10≤250；Steel plate vertical mixing coefficient can achieve to be wanted as follows Ask: Rt0.5 410-510MPa, tensile strength Rm are 590-670MPa, and yield tensile ratio Rt0.5/Rm≤0.80 uniformly extends uEL >=13%, stress ratio Rt1.5/Rt0.5 >=1.22.
(6) using the steel plate of above-mentioned microstructure and property, manufactured large deformation X70M straight-line joint submerged arc welding tube lateral performance meets Following to require: yield strength Rt0.5 is 490-590MPa, and tensile strength Rm is 580-680MPa, yield tensile ratio Rt0.5/Rm≤ 0.86, -20 DEG C of ballistic work CVN >=200J, -10 DEG C of DWTT section of shear SA >=85%, HV10≤260；Steel pipe longitudinal direction mechanical property It can achieve following requirement: Rt0.5 470-570MPa, tensile strength Rm is 580-680MPa, yield tensile ratio Rt0.5/Rm≤ 0.83, uniformly extend uEL >=9%, stress ratio Rt1.5/Rt0.5 >=1.16.
Specific embodiment
Below by embodiment, the present invention is further illustrated.
The embodiment of the present invention is smelted according to the component proportion of technical solution, is continuous casting, rolling, continuous annealing, smooth. Cooling including converter or electric furnace smelting → external refining → casting → slab reheating → controlled rolling → control, slab adds again Heat: steel billet is reheated after cleaning, and steel billet tapping temperature is controlled at 1150-1220 DEG C.Steel plate rolling technique system
Roughing finishing temperature >=1000 DEG C, single pass heavy deformation 5%-19%, the single pass heavy deformation of last three passage 12%-19%；Intermediate temperature control plate blank thickness 2.5t-4.0t, t are finished steel plate thickness；800 DEG C -900 DEG C of finish rolling start rolling temperature, essence Roll 720 DEG C -820 DEG C of finishing temperature.Steel plate cooling technique system: if when cooling water temperature≤15 DEG C, opening 690 DEG C ± 20 of cold temperature DEG C, 350 DEG C ± 20 DEG C of final cooling temperature, cooling velocity control in 15-24 DEG C/s；If when cooling water temperature >=20 DEG C, opening cold temperature 740 DEG C ± 20 DEG C, 270 DEG C ± 20 DEG C of final cooling temperature, cooling velocity are controlled in 15-24 DEG C/s；If 15 DEG C of < cooling water temperature < At 20 DEG C, 715 DEG C ± 20 DEG C of cold temperature, 310 DEG C ± 20 DEG C of final cooling temperature are opened, cooling velocity is controlled in 15-24 DEG C/s.
The ingredient of steel of the embodiment of the present invention is shown in Table 1.The main technologic parameters of steel of the embodiment of the present invention are shown in Table 2.The present invention is real The lateral performance for applying a steel is shown in Table 3.Longitudinal performance of steel of the embodiment of the present invention is shown in Table 4.Steel pipe made of steel of the embodiment of the present invention Lateral performance is shown in Table 5.Steel pipe longitudinal direction performance made of steel of the embodiment of the present invention is shown in Table 6.
The ingredient of 1 steel of the embodiment of the present invention of table
C* Si Mn Cu Cr Mo Ni Nb* V* Ti* Al* P* S*
1 89 0.22 1.45 0.12 0.29 0.29 0.12 33 45 14 35 7 4
2 22 0.38 1.74 0.06 0.30 0.07 0.33 11 65 24 15 9 2
3 25 0.30 1.53 0.33 0.07 0.27 0.09 13 35 12 39 8 3
4 60 0.27 1.50 0.21 0.24 0.14 0.25 23 52 20 27 7 2
5 55 0.33 1.37 0.09 0.27 0.33 0.15 23 55 19 25 8 3
6 62 0.29 1.55 0.24 0.18 0.12 0.18 13 62 21 24 7 3
7 85 0.12 1.62 0.07 0.15 0.06 0.30 25 15 22 19 5 4
8 74 0.15 1.42 0.30 0.06 0.15 0.07 18 32 16 31 8 2
9 59 0.25 1.60 0.18 0.21 0.11 0.22 33 42 15 26 7 3
10 65 0.08 1.58 0.15 0.33 0.30 0.06 15 25 17 29 9 2
11 45 0.35 1.36 0.27 0.09 0.12 0.29 27 22 17 21 7 2
12 33 0.19 1.67 0.29 0.12 0.09 0.27 34 12 18 11 6 4
Note:*Indicate that the numerical value need to be multiplied by 10-3
The main technologic parameters of 2 steel of the embodiment of the present invention of table
The lateral performance of 3 steel of the embodiment of the present invention of table
Rt0.5, MPa Rm, MPa Rt0.5/Rm - 30 DEG C of CVN, J - 20 DEG C of DWTT, % HV10
1 453 625 0.72 257 95 225
2 459 635 0.72 284 95 210
3 453 620 0.73 237 90 205
4 458 620 0.74 231 95 215
5 447 620 0.72 291 90 217
6 428 610 0.70 270 95 213
7 452 615 0.73 240 90 210
8 435 610 0.71 264 90 220
9 453 620 0.73 268 90 205
10 427 615 0.69 256 90 210
11 461 645 0.71 276 95 205
12 465 640 0.73 280 95 220
Longitudinal performance of 4 steel of the embodiment of the present invention of table
Rt0.5, MPa Rm, MPa Rt0.5/Rm UEL, % Rt1.5/Rt0.5
1 418 600 0.70 16.1 1.28
2 442 620 0.71 15.3 1.28
3 425 595 0.71 16.5 1.26
4 443 635 0.70 14.7 1.28
5 416 595 0.70 15.1 1.26
6 451 635 0.71 13.9 1.26
7 455 645 0.71 15.8 1.26
8 443 630 0.70 14.3 1.25
9 449 640 0.70 15.5 1.26
10 443 625 0.71 14.8 1.26
11 448 640 0.70 14.7 1.27
12 437 615 0.71 14.5 1.26
Steel pipe transverse performance made of 5 steel of the embodiment of the present invention of table
Rt0.5, MPa Rm, MPa Rt0.5/Rm - 20 DEG C of CVN, J - 10 DEG C of DWTT, % HV10
1 530 661 0.80 297 97 235
2 519 651 0.80 292 97 234
3 517 640 0.81 249 95 233
4 524 650 0.81 290 99 230
5 519 635 0.82 289 97 249
6 529 631 0.84 231 97 226
7 514 633 0.81 250 97 234
8 494 627 0.79 269 94 247
9 519 629 0.83 263 92 250
10 496 625 0.79 247 97 241
11 519 631 0.82 262 93 229
12 492 632 0.78 252 92 246
Steel pipe longitudinal direction performance made of 6 steel of the embodiment of the present invention of table
Rt0.5, MPa Rm, MPa Rt0.5/Rm UEL, % Rt1.5/Rt0.5
1 488 625 0.78 11.4 1.23
2 477 610 0.78 11.8 1.21
3 488 595 0.82 10.6 1.21
4 482 610 0.79 12.5 1.21
5 485 600 0.81 11.0 1.20
6 483 620 0.78 12.2 1.21
7 475 595 0.80 11.5 1.21
8 491 620 0.79 11.4 1.22
9 495 630 0.79 11.2 1.21
10 483 625 0.77 12.8 1.23
11 489 630 0.78 12.0 1.23
12 483 610 0.79 13.2 1.21
In order to state the present invention, explanation appropriately and is being sufficiently carried out to the present invention by embodiment among the above, it is above Embodiment is merely to illustrate the present invention, and not limitation of the present invention, those of ordinary skill in related technical field, not In the case where being detached from the spirit and scope of the present invention, it can also make a variety of changes and modification, made any modification are equally replaced It changes, improve, should all be included in the protection scope of the present invention, scope of patent protection of the invention should be limited by claim It is fixed.

Claims (2)

1. a kind of X70M Pipeline Steel Plate of large deformation containing V, which is characterized in that the ingredient of the steel plate is as follows by weight percentage: C 0.02%-0.09%, Si 0.05%-0.40%, Mn 1.35%-1.75%, Cu 0.05%-0.35%, Cr 0.05%- 0.35%, Ni 0.05%-0.35%, Mo 0.05%-0.35%, Nb 0.010%-0.035%, V 0.01%-0.07%, Ti 0.010%-0.025%, Al 0.01%-0.04%, P≤0.010%, S≤0.005%, remaining for Fe and it is several not Evitable impurity element, remaining is Fe and several inevitable impurity elements.
2. a kind of manufacturing method of the X70M of large deformation containing V Pipeline Steel Plate described in claim 1, including converter or electric furnace smelting → External refining → casting → slab reheating → controlled rolling → control is cooling, it is characterised in that:
(1) slab reheats: steel billet is reheated after cleaning, and steel billet tapping temperature is controlled at 1150-1220 DEG C；
(2) steel plate rolling technique system:
Roughing finishing temperature >=1000 DEG C, single pass heavy deformation 5%-19%, the single pass heavy deformation 12%- of last three passage 19%；Intermediate temperature control plate blank thickness 2.5t-4.0t, t are finished steel plate thickness；800 DEG C -900 DEG C of finish rolling start rolling temperature, finish rolling finish to gauge 720 DEG C -820 DEG C of temperature；
(3) steel plate cooling technique system:
If when cooling water temperature≤15 DEG C, opening 690 DEG C ± 20 DEG C of cold temperature, 350 DEG C ± 20 DEG C of final cooling temperature, cooling velocity control In 15-24 DEG C/s；
If when cooling water temperature >=20 DEG C, opening 740 DEG C ± 20 DEG C of cold temperature, 270 DEG C ± 20 DEG C of final cooling temperature, cooling velocity control In 15-24 DEG C/s；
If at 15 DEG C 20 DEG C of < cooling water temperature <, opening 715 DEG C ± 20 DEG C of cold temperature, 310 DEG C ± 20 DEG C of final cooling temperature, cooling speed Degree control is in 15-24 DEG C/s.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111304554A (en) * 2020-03-19 2020-06-19 鞍钢股份有限公司 High-strain hot-rolled steel plate for L485M marine pipeline and manufacturing method thereof
CN111304534A (en) * 2020-03-19 2020-06-19 鞍钢股份有限公司 High-strain steel plate for high-homogeneity L485 marine pipeline and manufacturing method thereof
CN111334711A (en) * 2020-03-19 2020-06-26 鞍钢股份有限公司 Economical L485M high-strain hot-rolled steel plate for marine pipeline and manufacturing method thereof
CN111378823A (en) * 2020-03-19 2020-07-07 鞍钢股份有限公司 High-strain L485M hot-rolled steel plate for marine pipeline and manufacturing method thereof

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102409224A (en) * 2010-09-21 2012-04-11 鞍钢股份有限公司 Hot rolled steel plate with excellent low-temperature toughness for thick submerged pipeline and production method of hot rolled steel plate
CN102828125A (en) * 2011-06-14 2012-12-19 鞍钢股份有限公司 Strain design based pipe line steel X70 and its manufacturing method
CN102828120A (en) * 2011-06-14 2012-12-19 鞍钢股份有限公司 Strain design based economical pipe line steel and its manufacturing method
CN103266285A (en) * 2013-06-11 2013-08-28 鞍钢股份有限公司 Production method of X80 pipeline steel
CN103834874A (en) * 2012-11-27 2014-06-04 宝山钢铁股份有限公司 X65-70 subsea pipeline steel with thick wall and high DWTT (drop weight tear test) property and production method
CN103981461A (en) * 2014-05-30 2014-08-13 秦皇岛首秦金属材料有限公司 X90 pipeline steel wide and thick plate and production method thereof
CN104561825A (en) * 2013-10-10 2015-04-29 鞍钢股份有限公司 Low-cost X80 pipeline steel and manufacturing method thereof
CN105624585A (en) * 2014-11-26 2016-06-01 鞍钢股份有限公司 X80Q hot-rolled thick plate used for floating type LNG pipeline and production method of X80Q hot-rolled thick plate
CN105695898A (en) * 2014-11-28 2016-06-22 鞍钢股份有限公司 X70Q hot-rolled thick plate for floating LNG pipeline and production method of X70Q hot-rolled thick plate
CN106282841A (en) * 2015-05-27 2017-01-04 鞍钢股份有限公司 A kind of deep-sea oil gas feed-line steel X70 and ultra-thick steel plates hot-rolling method thereof
CN106319387A (en) * 2015-06-16 2017-01-11 鞍钢股份有限公司 X80 large deformation resisting pipeline steel and manufacturing method
CN106319390A (en) * 2015-06-16 2017-01-11 鞍钢股份有限公司 X70 large deformation resisting pipeline steel and manufacturing method
CN106367685A (en) * 2016-08-30 2017-02-01 江阴兴澄特种钢铁有限公司 X80 and below steel grade pipeline steel for deep-sea drilling marine riser and preparation method thereof
CN106480381A (en) * 2015-08-31 2017-03-08 鞍钢股份有限公司 A kind of cryogenic pipelines good hot rolled heavy plate of plasticity and toughness and its manufacture method

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102409224A (en) * 2010-09-21 2012-04-11 鞍钢股份有限公司 Hot rolled steel plate with excellent low-temperature toughness for thick submerged pipeline and production method of hot rolled steel plate
CN102828125A (en) * 2011-06-14 2012-12-19 鞍钢股份有限公司 Strain design based pipe line steel X70 and its manufacturing method
CN102828120A (en) * 2011-06-14 2012-12-19 鞍钢股份有限公司 Strain design based economical pipe line steel and its manufacturing method
CN103834874A (en) * 2012-11-27 2014-06-04 宝山钢铁股份有限公司 X65-70 subsea pipeline steel with thick wall and high DWTT (drop weight tear test) property and production method
CN103266285A (en) * 2013-06-11 2013-08-28 鞍钢股份有限公司 Production method of X80 pipeline steel
CN104561825A (en) * 2013-10-10 2015-04-29 鞍钢股份有限公司 Low-cost X80 pipeline steel and manufacturing method thereof
CN103981461A (en) * 2014-05-30 2014-08-13 秦皇岛首秦金属材料有限公司 X90 pipeline steel wide and thick plate and production method thereof
CN105624585A (en) * 2014-11-26 2016-06-01 鞍钢股份有限公司 X80Q hot-rolled thick plate used for floating type LNG pipeline and production method of X80Q hot-rolled thick plate
CN105695898A (en) * 2014-11-28 2016-06-22 鞍钢股份有限公司 X70Q hot-rolled thick plate for floating LNG pipeline and production method of X70Q hot-rolled thick plate
CN106282841A (en) * 2015-05-27 2017-01-04 鞍钢股份有限公司 A kind of deep-sea oil gas feed-line steel X70 and ultra-thick steel plates hot-rolling method thereof
CN106319387A (en) * 2015-06-16 2017-01-11 鞍钢股份有限公司 X80 large deformation resisting pipeline steel and manufacturing method
CN106319390A (en) * 2015-06-16 2017-01-11 鞍钢股份有限公司 X70 large deformation resisting pipeline steel and manufacturing method
CN106480381A (en) * 2015-08-31 2017-03-08 鞍钢股份有限公司 A kind of cryogenic pipelines good hot rolled heavy plate of plasticity and toughness and its manufacture method
CN106367685A (en) * 2016-08-30 2017-02-01 江阴兴澄特种钢铁有限公司 X80 and below steel grade pipeline steel for deep-sea drilling marine riser and preparation method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111304554A (en) * 2020-03-19 2020-06-19 鞍钢股份有限公司 High-strain hot-rolled steel plate for L485M marine pipeline and manufacturing method thereof
CN111304534A (en) * 2020-03-19 2020-06-19 鞍钢股份有限公司 High-strain steel plate for high-homogeneity L485 marine pipeline and manufacturing method thereof
CN111334711A (en) * 2020-03-19 2020-06-26 鞍钢股份有限公司 Economical L485M high-strain hot-rolled steel plate for marine pipeline and manufacturing method thereof
CN111378823A (en) * 2020-03-19 2020-07-07 鞍钢股份有限公司 High-strain L485M hot-rolled steel plate for marine pipeline and manufacturing method thereof
CN111304534B (en) * 2020-03-19 2021-07-20 鞍钢股份有限公司 High-strain steel plate for high-homogeneity L485 marine pipeline and manufacturing method thereof
CN111378823B (en) * 2020-03-19 2021-12-24 鞍钢股份有限公司 High-strain L485M hot-rolled steel plate for marine pipeline and manufacturing method thereof

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