CN104109805B - Oil casing pipe steel band and production method thereof - Google Patents
Oil casing pipe steel band and production method thereof Download PDFInfo
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- CN104109805B CN104109805B CN201410359590.7A CN201410359590A CN104109805B CN 104109805 B CN104109805 B CN 104109805B CN 201410359590 A CN201410359590 A CN 201410359590A CN 104109805 B CN104109805 B CN 104109805B
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Abstract
The present invention relates to oil casing pipe steel band and production method thereof, belong to field of alloy steel. The technical problem to be solved in the present invention is to provide a kind of petroleum casing pipe hot-rolled steel and production method thereof. Oil casing pipe steel band of the present invention, its chemical composition consists of by weight percentage: C:0.15%～0.20%, Si:0.10%～0.20%, Mn:0.95%～1.20%, P≤0.025%, S≤0.015%, V:0.05%～0.010%, Ti:0.008%～0.020%, all the other are Fe and inevitable impurity. Further, the invention also discloses the production method of above-mentioned oil casing pipe steel band. Oil casing pipe steel band yield tensile ratio of the present invention lower than 0.08, percentage elongation >=37%; There is good welding performance and processability.
Description
Technical field
The present invention relates to oil casing pipe steel band and production method thereof, belong to field of alloy steel.
Background technology
Petroleum casing pipe is the important piping material in oil, gas exploitation course, and petroleum casing pipe always adopts seamless steel pipe, butBe, along with the development of micro-alloying technology and Controlled Rolling And Controlled Cooling, hot-continuous-rolling strip steel can obtain good combination property, weldingAfter moulding, can replace seamless steel pipe completely, and it is high to have dimensional accuracy, even, the anti-extrusion performance of wall thickness is strong, after perforation notThe advantages such as cracking and low price, just progressively replace seamless steel pipe.
J55 straight welding oil annular tube steel band is except requiring to reach corresponding requirement of strength, also require to there is good welding performance,Processability and impact flexibility, yield tensile ratio is to weigh the important indicator of its processability, yield tensile ratio is low, illustrates that its processability is good.The iron and steel manufacturers such as domestic Baosteel, Anshan iron and steel plant, this steel, Mei Gang are all producing J55 straight welding oil annular tube steel band, but generalAdopt Nb microalloying, yield tensile ratio is higher.
Application number is 200310104862.0 Chinese patent application, adopt Nb microalloying, but it batches in its petroleum casing pipe430 DEG C～470 DEG C of temperature, so harsh rolling mill practice condition is difficult to realize on general hot tandem rolling mill, is unfavorable for large ruleDie worker's industry is promoted.
Publication number be CN101200791B Patent Application Publication one oil casing pipe steel and production method thereof cheaplyIn, its chemical composition is C:0.16%～0.21%, Si:0.15%～0.25%, and Mn:1.00%～1.20%, P≤0.020%,S≤0.009%, Nb:0.020%～0.030%, Ti:0.010%～0.020%, all the other are Fe and inevitable impurity.In the disclosed high ductility steel strip for J 55 petroleum sleeve of CN100560711C and manufacture method thereof, its chemical composition is C:0.15％～0.20％，Si：0.15％～0.30％，Mn：1.00％～1.45％，P≤0.020％，S≤0.010％，Nb：0.020％～0.040%, Ti:0.015%～0.040%. These two patents have adopted Nb and Ti combined microalloying, and Nb content is higher,Not only production cost is high, and yield tensile ratio is high.
The petroleum casing pipe of Chinese patent CN01126611.2 has adopted V-Ni-B microalloying, and V content is 0.07%～0.13%,Ni content is 0.05～0.25%, and alloying element is many, and production cost is high.
In low-alloy steel in the manufacture J55 grade welding petroleum sheath of publication number CN1924061A, its chemical composition is C:0.16％～0.21％，Si：0.10％～0.35％，Mn：1.00％～1.30％，P≤0.020％，S≤0.012％，V：0.020％～0.070%, Als:0.008%～0.060%, all the other are Fe and inevitable impurity; But its yield tensile ratio and percentage elongation are not veryDesirable.
Therefore the petroleum casing pipe hot-rolled steel of, finding a kind of low yield strength ratio, high-elongation seems particularly important.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of petroleum casing pipe hot-rolled steel and production method thereof.
Oil casing pipe steel band of the present invention, its chemical composition consists of by weight percentage: C:0.15%～0.20%, Si:0.10%～0.20％，Mn：0.95％～1.20％，P≤0.025％，S≤0.015％，V：0.05％～0.010％，Ti：0.008％～0.020％，All the other are Fe and inevitable impurity.
Further, as preferred version, oil casing pipe steel band of the present invention, its chemical composition consists of by weight percentage: C:0.15％～0.20％，Si：0.12％～0.20％，Mn：0.98％～1.15％，P≤0.020％，S≤0.009％，V：0.07％～0.09%, Ti:0.012%～0.017%, all the other are Fe and inevitable impurity.
Further, the invention also discloses the production method of oil casing pipe steel band of the present invention, comprise smelting, molten iron pretreatment,The refining of LF stove, continuous casting, heating, rolling and batch step; Rolling comprises again roughing and finish rolling; Except heating and rolling stepAll the other steps all can adopt existing method, and described heating-up temperature is 1180～1230 DEG C, and roughing temperature is 1180～1230 DEG C, essenceRolling inlet temperature is 980～1030 DEG C, and finishing temperature scope is 810～880 DEG C.
Further, as preferred version, every time deflection >=20% of described roughing, workpiece thickness is at 4 times of finished product thicknessAbove; The deflection of finish rolling passage third from the bottom more than 20%, the deflection of passage second from the bottom more than 17%, lastThe deflection of passage is more than 10%.
As more preferably scheme, every time deflection of described roughing is 20～40%, and workpiece thickness is finished product thickness 4～6Doubly; The deflection of finish rolling passage third from the bottom is 20～30%, and the deflection of passage second from the bottom is 17～20%, together lastInferior deflection is 10～15%.
Further, as preferred version, after finish rolling, be cooled to 580～650 DEG C with the cooling velocity of 50～100 DEG C/s, then enterRow batches.
Beneficial effect of the present invention:
1, oil casing pipe steel band of the present invention meets the mechanical property requirements of J55 petroleum casing pipe;
2, oil casing pipe steel band yield tensile ratio of the present invention is lower than 0.08;
3, oil casing pipe steel band percentage elongation >=37% of the present invention;
4, oil casing pipe steel band of the present invention has good welding performance and processability;
5, the preparation method of oil casing pipe steel band of the present invention, production technology is simple, and strong adaptability is produced all at general hot continuous rollingThe advantage that can produce.
Detailed description of the invention
Oil casing pipe steel band of the present invention, its chemical composition consists of by weight percentage: C:0.15%～0.20%, Si:0.10%～0.20％，Mn：0.95％～1.20％，P≤0.025％，S≤0.015％，V：0.05％～0.010％，Ti：0.008％～0.020％，All the other are Fe and inevitable impurity.
Wherein, C is main intensified element, but C content is too high, can reduce plasticity, toughness and the welding performance of steel, CThe too low machining property that can affect oil casing pipe steel band of content, is therefore controlled at 0.15%～0.20% by C content. MnMain Function be solution strengthening, in the situation that C upper content limit is limited, should suitably increase Mn content, Mn/Si is than can shadowThe machining property of phonolite oil annular tube steel band, General Requirements Mn/Si ratio will be not less than 3.5; Therefore Mn content is controlled at0.95%～1.20%, Si content is controlled at 0.10%～0.20%. The Main Function of V in steel is precipitation strength, in steel, adds in a subtle wayThe Ti of amount can improve the tissue of welding heat affected zone, improves the toughness of welding point.
Further, as preferred version, the chemical composition of above-mentioned oil casing pipe steel band consists of by weight percentage: C:0.15％～0.20％，Si：0.12％～0.20％，Mn：0.98％～1.15％，P≤0.020％，S≤0.009％，V：0.07％～0.09%, Ti:0.012%～0.017%, all the other are Fe and inevitable impurity.
Further, the invention also discloses the production method of oil casing pipe steel band of the present invention, comprise smelting, molten iron pretreatment,The refining of LF stove, continuous casting, heating, rolling and batch step, concrete technology is: desulfurizing iron → converter smelting top-bottom blowing → de-After the concise slag desulfurization → stove of oxygen, alloying and high alkalinity, chain-wales is mended and is fed Al line → LF stove Ti microalloying, alloying component fine settingAnd V microalloying → feed calcium line → continuous casting → heating of plate blank → high-pressure water descaling → roughing → finish rolling → laminar flow cooling → batch →Packaging warehouse-in.
Further, slab heating temperature is controlled at 1180～1230 DEG C, has so both ensured the abundant solid solution of V, prevents again OvshinskyThe abnormal growth of body crystal grain.
When roughing, keeping temperature is 1180～1230 DEG C, according to the difference of finished product thickness, selects suitable crude mill train, asPreferred version, the thick continuous casting billet of 200～250mm is general adopts 5 passages or 7 passage rollings, and every time deflection is necessary >=and 20%,Ensure austenite recrystallization, refine austenite crystal grain, workpiece thickness is at the more than 4 times of finished product thickness, to ensure that finish rolling always becomesShape amount.
980～1030 DEG C of finish rolling inlet temperature controls, the deflection of finish rolling passage third from the bottom is more than 20%, passage second from the bottomDeflection more than 17%, the deflection of last passage is more than 10%, finishing temperature scope is 810～880 DEG C, above-mentionedTechnique, can ensure non-recrystallization district deflection, increases Zona transformans, increases phase deformed nucleus core, refinement ferrite crystal grain.
Further, as more preferably scheme, every time deflection of described roughing is 20～40%, and workpiece thickness is that finished product is thickDegree 4～6 times; The deflection of finish rolling passage third from the bottom is 20～30%, and the deflection of passage second from the bottom is 17～20%,The deflection of last passage is 10～15%.
The cooling employing leading portion of the laminar flow type of cooling after finish rolling, is cooled to the pearly-lustre of 580～650 DEG C with the cooling velocity of 50～100 DEG C/sBody limited proportionality, batches and concentrates stacking cooling.
Below in conjunction with embodiment, the specific embodiment of the present invention is further described, does not therefore limit the present invention to instituteAmong the scope of embodiments of stating.
Embodiment 1 adopts the inventive method to prepare petroleum casing pipe hot-rolled steel
Concrete technology is: after the concise slag desulfurization → stove of the top-bottom blowing → deoxidation of desulfurizing iron → converter smelting, alloying and high alkalinityChain-wales is mended and is fed Al line → LF stove Ti microalloying, alloying component is finely tuned and V microalloying → hello calcium line → continuous casting → slab addsHeat → high-pressure water descaling → roughing → finish rolling → laminar flow is cooling → batches; Wherein, effective hot continuous rolling steel band component, in table 1, respectively walksRapid technological parameter is in table 2 and table 3, and mechanical property is in table 4.
Table 1
| Embodiment | C | Si | Mn | P | S | V | Ti |
| 1 | 0.17 | 0.17 | 1.15 | 0.017 | 0.004 | 0.07 | 0.012 |
Table 2
Table 3
Table 4
Embodiment 2～10
Adopt the method in embodiment 1 to produce oil casing pipe steel band, component is in table 5, and each process parameter is in table 6 and table 7,
Mechanical property is in table 8.
Table 5
| Embodiment | C | Si | Mn | P | S | V | Ti |
| 2 | 0.18 | 0.18 | 0.98 | 0.015 | 0.008 | 0.07 | 0.015 |
| 3 | 0.19 | 0.12 | 1.06 | 0.017 | 0.003 | 0.08 | 0.014 |
| 4 | 0.16 | 0.17 | 1.15 | 0.012 | 0.009 | 0.07 | 0.017 |
| 5 | 0.15 | 0.19 | 1.08 | 0.020 | 0.004 | 0.08 | 0.014 |
| 6 | 0.20 | 0.18 | 1.12 | 0.014 | 0.005 | 0.09 | 0.017 |
| 7 | 0.19 | 0.16 | 1.16 | 0.017 | 0.006 | 0.07 | 0.012 |
| 8 | 0.18 | 0.17 | 1.03 | 0.015 | 0.008 | 0.08 | 0.016 |
| 9 | 0.19 | 0.19 | 1.10 | 0.016 | 0.005 | 0.07 | 0.015 |
Continued 5
| 10 | 0.18 | 0.20 | 1.15 | 0.015 | 0.008 | 0.08 | 0.014 |
Table 6
Table 7
Table 8
Continued 8
| 3 | 433 | 582 | 40.0 | 0.74 | Close |
| 4 | 444 | 616 | 38.5 | 0.72 | Close |
| 5 | 457 | 609 | 42.0 | 0.75 | Close |
| 6 | 435 | 593 | 41.5 | 0.73 | Close |
| 7 | 429 | 591 | 43.5 | 0.73 | Close |
| 8 | 449 | 605 | 37.0 | 0.74 | Close |
| 9 | 457 | 619 | 40.5 | 0.74 | Close |
| 10 | 432 | 608 | 37.5 | 0.71 | Close |
Comparative example 1
Adopt the chemical composition in embodiment 1 to produce oil casing pipe steel band, but change hot rolling technology, Hot Rolling Parameters is in table 9,Mechanical property is in table 10.
Table 9
Table 10
As can be seen from Table 10, its yield tensile ratio is apparently higher than embodiment 1.
Claims (5)
1. oil casing pipe steel band, is characterized in that, its chemical composition consists of by weight percentage: C:0.15%～0.20%,Si：0.12％～0.20％，Mn：0.98％～1.15％，P≤0.020％，S≤0.009％，V：0.07％～0.09％，Ti：0.012％～0.017%, all the other are Fe and inevitable impurity; Its preparation method comprises heating steps and the rolling before rolling, and rolling is wrapped againDraw together roughing and finish rolling step, wherein said heating-up temperature is 1180～1230 DEG C, and roughing temperature is 1180～1230 DEG C, and finish rolling entersMouth temperature is 980～1030 DEG C, and finishing temperature is 810～880 DEG C.
2. the preparation method of oil casing pipe steel band claimed in claim 1, comprises heating steps and rolling before rolling, rollingComprise again roughing and finish rolling, it is characterized in that: described heating-up temperature is 1180～1230 DEG C, roughing temperature is 1180～1230 DEG C,Finish rolling inlet temperature is 980～1030 DEG C, and finishing temperature is 810～880 DEG C.
3. the preparation method of oil casing pipe steel band according to claim 2, is characterized in that: every time change of described roughingShape amount >=20%, workpiece thickness is at the more than 4 times of finished product thickness; The deflection of finish rolling passage third from the bottom, more than 20%, fallsThe deflection of several the second passages is more than 17%, and the deflection of last passage is more than 10%.
4. the preparation method of oil casing pipe steel band according to claim 3, is characterized in that: every time change of described roughingShape amount is 20～40%, workpiece thickness is finished product thickness 4～6 times; The deflection of finish rolling passage third from the bottom is 20～30%,The deflection of passage second from the bottom is 17～20%, and the deflection of last passage is 10～15%.
5. according to the preparation method of the oil casing pipe steel band described in claim 2～4 any one, also comprise batching after rollingStep, is characterized in that: after finish rolling, be cooled to 580～650 DEG C, then batch with the cooling velocity of 50～100 DEG C/s.
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| CN105057366B (en) * | 2015-09-17 | 2017-05-31 | 山东钢铁股份有限公司 | A kind of method for eliminating oil casing pipe steel plane of bending |
| CN105385947A (en) * | 2015-11-26 | 2016-03-09 | 河北钢铁股份有限公司承德分公司 | Steel for vanadium-microalloying 600 MPa high-strength packing belt and production method |
| CN107604246A (en) * | 2017-09-11 | 2018-01-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Low cost S EW petroleum casing pipes hot continuous rolling coil of strip and its production method |
| CN107604247A (en) * | 2017-09-11 | 2018-01-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Superhigh intensity SEW petroleum casing pipes hot continuous rolling coil of strip and its production method |
| CN111455267A (en) * | 2020-03-06 | 2020-07-28 | 广西盛隆冶金有限公司 | High-strength and high-toughness J55 hot rolled steel strip and production method thereof |
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| JP3562353B2 (en) * | 1998-12-09 | 2004-09-08 | 住友金属工業株式会社 | Oil well steel excellent in sulfide stress corrosion cracking resistance and method for producing the same |
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