CN104561774A - P110-grade straight welding petroleum casing pipe and manufacturing method thereof - Google Patents
P110-grade straight welding petroleum casing pipe and manufacturing method thereof Download PDFInfo
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- 238000003466 welding Methods 0.000 title claims abstract description 20
- 239000003208 petroleum Substances 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 18
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 14
- 238000009749 continuous casting Methods 0.000 claims abstract description 12
- 238000005496 tempering Methods 0.000 claims abstract description 12
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 8
- 238000003723 Smelting Methods 0.000 claims abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 56
- 239000010959 steel Substances 0.000 claims description 56
- 239000000203 mixture Substances 0.000 claims description 10
- 238000007669 thermal treatment Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
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- 238000005516 engineering process Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 238000007670 refining Methods 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 238000010791 quenching Methods 0.000 abstract description 7
- 230000000171 quenching effect Effects 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 239000010970 precious metal Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 14
- 239000000956 alloy Substances 0.000 description 14
- 239000011572 manganese Substances 0.000 description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 10
- 229910052804 chromium Inorganic materials 0.000 description 10
- 229910052802 copper Inorganic materials 0.000 description 8
- 229910052750 molybdenum Inorganic materials 0.000 description 8
- 229910052759 nickel Inorganic materials 0.000 description 8
- 229910052758 niobium Inorganic materials 0.000 description 7
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- 229910001566 austenite Inorganic materials 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910000734 martensite Inorganic materials 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 239000008186 active pharmaceutical agent Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910000922 High-strength low-alloy steel Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
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- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
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- 230000006641 stabilisation Effects 0.000 description 1
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- 239000010913 used oil Substances 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a P110-grade straight welding petroleum casing pipe and a manufacturing method thereof, wherein the chemical components are as follows according to the weight percentage: c: 0.24% -0.28%, Si: 0.15% -0.30%, Mn: 1.25% -1.50%, P: less than or equal to 0.020%, S: less than or equal to 0.008 percent, Ti: 0.010% -0.030%, Als: 0.02% -0.05%, V: 0.050% -0.080%, N: less than or equal to 0.008 percent, and the balance of Fe and inevitable elements. The process comprises smelting and continuous casting, wherein a plate blank is heated to 1180-1250 ℃, two-stage controlled rolling is adopted, and the whole-tube quenching and tempering heat treatment process is adopted: making tube by ERW, heating the whole tube to 880-940 deg.C, maintaining the temperature for 30-60min, and water quenching; heating the whole tube to 500-560 ℃, preserving the heat for 60-80min, and air cooling and tempering. The invention has the following effects: the cost is reduced by replacing precious metal with a small amount of V; the hot-rolled plate coil has lower performance, and the subsequent pipe making and forming are easy; the whole pipe is subjected to quenching and tempering heat treatment, the performance is P110 grade, and the consistency of the pipe body and the welding seam performance is ensured.
Description
Technical field
The invention belongs to high-strength low-alloy steel field, particularly in API SPEC5CT, grade of steel is P110 petroleum casing pipe and manufacture method thereof.
Background technology
Petroleum casing pipe is one of the most frequently used oil country tubular good in oil field, particularly a kind of ERW/HFW(ERW/HFW, Electric Resistance Weld/High frequency electric-resistance-weld, resistance welding) sleeve pipe, consumption is large, spend many, be requisite construction material in oil-gas field drill operation, only within 2010, just reach 2,500,000 tons.ERW sleeve pipe compared with seamless tube, significant advantages such as there is uniform wall thickness, dimensional precision is high, perforation property good, Anti-collapse ability is strong, cost is low.But the oil well pipe that the Hi-grade steel that petroleum industry requires, corrosion-resistant, special screw thread require, major part relies on import at present.Domestic only have low grade of steel ERW sleeve pipe can substitute traditional weldless steel tube at present.Therefore, carry out the research of Hi-grade steel high-frequency straight seam weldering sand string production and technique in a deep going way, producing superior in quality Hi-grade steel high-frequency straight seam weldering sand string becomes the task of top priority.To saving cost for oil production, the oil production level improving China has profound significance.
API Spec5CT specifies: the yield strength of P110 rank steel pipe between 758-965MPa, tensile strength >=862MPa, elongation >=14%; Horizontal Charpy-V impact power >=32J when 0 DEG C.If the steel band of As rolled reaches this intensity, need to add a large amount of precious alloy to improve intensity, increase cost of alloy, and the mother metal of steel pipe and welding seam tissue capability cannot reach consistent; The shaping difficulty of steel pipe is large simultaneously, and the dimensional precision of steel pipe and circularity cannot ensure.
Therefore, the hot rolled strip that As rolled intensity is low can be adopted to carry out ERW welding tube-making, then carry out homogeneous tube thermal treatment, make the final performance of steel pipe reach P110 stratification levels.And weld seam and body carry out identical thermal treatment process, finally organizing of obtaining is identical, effectively alleviates the tissue of weld seam and body, performance difference, eliminates unrelieved stress, improves the quality of steel pipe integral.
Before making the present invention, existing individually about document or the patent of invention of P110 grade of steel ERW petroleum casing pipe, but the low manganese of carbon adds the P110 level ERW petroleum casing pipe report of a small amount of V low-cost design seldom in adopting, the document that simple introduction is comparatively close with the present invention below and patent:
1) Chinese patent CN101643883A, N80, P110, L80 grade of steel straight welding oil annular tube steel and cover pipe manufacturer.Containing C:0.10%-0.24%, Mn:1.4%-1.6%, Cr:0.3%-0.6%, Nb:0.12%-0.14%, V:0.08%-0.12%, Ti:0.18%-0.22% in composition.In this patent, compound adds noble element Nb, V, Cr, and cost of alloy is high.
2) Chinese patent CN102430901A, a kind of manufacture method of P110 grade of steel high-frequency straight seam welded pipe.Containing C:0.25%-0.30%, Mn:1.1%-1.5%, Cr:0.15%-0.35%, S in composition :≤0.002%.In this patent, Addition ofelements Cr, S content requirement is strict, alloy and smelting cost high.
3) Chinese patent CN101353949A, the heat treating method of small diameter high steel level oil conduit.Containing C:0.15%-0.50%, Mn:0.25%-1.9%, Mo:0.25%-1.10%, Cr:0.4%-14%, Ni :≤0.99%, Cu :≤0.35% in composition.Compound Addition ofelements Mo, Ni, Cu, Cr in this patent, cost of alloy is high.
4) Chinese patent CN102534372A, a kind of preparation method of oil and gas exploitation P110 level expansion pipe.Containing C:0.10%-0.30%, Mn:0.70%-2.0%, Nb:0.02%-0.1% in composition.Add noble element Nb in this patent, there are continuously cast bloom surface angle transverse fissure quality problems, and cost of alloy is high.
5) paper " research of P110 steel duplex structure ", C:0.24%, Si:0.25%, Mn:1.2%, Cr:0.5%, Ni:0.021%, Mo:0.021%, Cu:0.017%, P:0.014%, S:0.0058% in composition.In this paper, compound adds expensive alloying elements Mo, Ni, Cu, Cr, and cost of alloy is high.
Above in disclosed patent or document, some interpolations more precious alloy Mo, Ni, Cu, Nb, V, cost of alloy is high; Some S content requirement are high, and smelting cost is high.In all adopting with the present invention, the low manganese of carbon adds a small amount of V and is designed with obvious difference.
Summary of the invention
The object of the present invention is to provide a kind of P110 grade of steel electric resistance welding petroleum sleeve pipe and manufacture method thereof, in particularly adopting, the low manganese of carbon adds a small amount of V low-cost design, As rolled steel band performance yield strength is 550-650MPa, tensile strength is 700-800MPa, and after homogeneous tube Tempering and Quenching, performance is vertical masonry joint resistance welding (ERW) petroleum casing pipe and the manufacture method thereof of P110 rank.Produce the technical problem existed for current straight slit electric resistance welding petroleum casing pipe P110, such as: more precious alloy Mo, Ni, Cu, Nb, V, cost of alloy is high; The problems such as some S content requirement are high, and smelting cost is high, special proposition technical scheme of the present invention.
A kind of P110 level vertical masonry joint resistance welding (ERW) petroleum casing pipe of the present invention, its chemical composition (weight, %) proportioning is as follows: C:0.24%-0.28%, Si:0.15%-0.30%, Mn:1.25%-1.50%, P :≤0.020%, S :≤0.008%, Ti:0.010%-0.030%, Als:0.02%-0.05%, V:0.050%-0.080%, N :≤0.008%, all the other are Fe and inevitable element.
Compared with prior art, this programme C content is moderate, and the impelling strength of steel band is good; Replace precious metal Mo, Ni, Cu, Nb, Cr etc. with a small amount of V, reduce cost of alloy; As rolled coiled sheet performance is lower, and follow-up tubulation is easily shaping; Homogeneous tube carries out Tempering and Quenching, and performance is P110 rank, ensure that the consistence of body and Weld Performance.
C: be carbide forming element is the most effective element of proof strength, can improve stability after hardening capacity and thermal treatment, strength of materials when ensureing high temperature long-time tempering.Carbon content has important impact to final austenite, martensitic carbon content and volume fraction.Only ensure enough carbon, just can form enough rich carbon residual austenites and can stablize to room temperature.But when carbon content is greater than 0.5%, obviously can occur quenching fragility and martensite fragility, therefore, carbon content is unsuitable too low; But carbon content is too high will affect the impelling strength of product, and its optimum range is 0.24%-0.28%.
Si: can solution strengthening effect be played, but its too high levels can make the plasticity of steel and toughness reduce, and its optimum range is 0.15%-0.30%.
Mn: manganese has solution strengthening effect, can also increase stabilization of austenite, also favourable to raising hardening capacity, effectively ensures the intensity of steel.Manganese can reduce martensite transformation temperature Ms, increases the content of residual austenite, and the Toughness of manganese to steel plate is little simultaneously.But Fe content is excessive, the center segregation tendency of continuously cast bloom can be increased, banded structure in steel plate can be made to increase, and preserve after heat treatment, a certain amount of ground banded structure can be contained in final steel plate, and bainite, martensite etc. are assembled in banded structure firmly, and the fragility of steel plate is increased, plasticity reduces, mechanical properties decrease.Its optimum range is 1.25%-1.50%.
P: phosphorus is harmful element in steel, increases the cold shortness of steel, welding property is degenerated, and reduces plasticity, cold-bending property is degenerated, should control its content≤0.020%.
S: sulphur is harmful element in steel, makes steel produce red brittleness, reduces ductility and the toughness of steel, worsens welding property, for ensureing the high cleanliness of molten steel, should control its content≤0.008%.
V: the carbonitride of vanadium is evenly separated out with small and dispersed form in ferrite, has refined crystalline strengthening effect, can significantly improve yield strength and the tensile strength of material, improve low-temperature impact toughness simultaneously; When high temperature fuses into austenite, the hardening capacity of steel can be increased; Be solid-solution in ferrite and have extremely strong solution strengthening effect, but too highly can increase cost of alloy, suitable scope is 0.050%-0.080%.
Ti: titanium is strong nitrogen killer, when adding about 0.015% Ti, the tiny TiN precipitated phase of high-temperature stable can be formed when sheet billet continuous casting, this tiny TiN precipitated phase effectively can stop continuously cast bloom the growing up of austenite crystal in heat-processed, have obvious effect to the toughness improving steel welding heat affected zone, suitable scope is 0.010%-0.030% simultaneously.
Als: aluminium is conventional reductor, adds a small amount of aluminium in steel, can crystal grain thinning, and improve impelling strength, suitable scope is 0.02%-0.05%.
N: solid solution nitrogen has the strong effect of pinning dislocation, has detrimentally affect to toughness, should control its content≤0.008%
The manufacture method of a kind of P110 grade of steel of the present invention straight slit electric resistance welding petroleum casing pipe, comprise that hot metal pretreatment, smelting molten steel, external refining and sheet billet continuous casting, continuously cast bloom reheat, rolling, cool, batch, ERW tubulation and homogeneous tube thermal treatment.It is characterized in that:
1) continuous casting process is smelted: hot metal pretreatment, converter smelting-through top blast or top bottom blowing, external refining, the frivolous sulphuring treatment of LF stove and carry out Calcium treatment to control inclusion morphology and to improve the ductility of steel, toughness and cold-bending property, sheet billet continuous casting is made continuous casting steel billet-continuous casting and is adopted induction stirring or dynamic soft-reduction, to improve the quality of continuous casting steel billet.
2) rolling technology: continuous casting steel billet is heated to 1180-1250 through process furnace, DEG C with after adopt two-stage control rolling through hot tandem, first stage start rolling temperature is 1100-1230, DEG C finishing temperature is greater than 960, DEG C subordinate phase start rolling temperature is less than 950, DEG C finishing temperature is 800-850, DEG C to roll rear steel band with 11-15 DEG C/fast s degree cools, and carries out steel strip coiling 500-580 DEG C of temperature.
3) yield strength of As rolled steel band is 550-650MPa, and tensile strength is 700-800MPa.
4) steel band carries out high frequency/medium frequency electric welding resistance through ERW unit and makes steel pipe.
5) homogeneous tube quenching-and-tempering process: after ERW tubulation, homogeneous tube is heated to 880-940, DEG C insulation 30-60min, shrend; Again homogeneous tube is heated to 500-560, DEG C insulation 60-80min, air cooling tempering.
6) yield strength of modified rear homogeneous tube is 760-860MPa, and tensile strength is 880-980MPa, 0 DEG C of horizontal Charpy-V impact power (3 sample averages) Akv > 80J.
Advantage and the effect of technical solution of the present invention are: 1) replace noble metal Mo, Ni, Cu, Nb, Cr with a small amount of V, reduce cost of alloy; 2) C content is moderate, and weldability and the impelling strength of coiled sheet are good; 3) As rolled coiled sheet performance is lower, and follow-up tubulation is easily shaping; 4) homogeneous tube carries out Tempering and Quenching, and performance is P110 rank, ensure that the consistence of body and Weld Performance.
Embodiment
Enumerate embodiments of the invention below, test steel chemical composition is in table 1, and heating, rolling process for cooling are in table 2, and mechanical property is in table 3.
Table 1 chemical composition (wt, %)
| Embodiment | C | Si | Mn | P | S | V | Ti | Als | N |
| 1 | 0.25 | 0.23 | 1.42 | 0.007 | 0.006 | 0.06 | 0.018 | 0.03 | 0.005 |
| 2 | 0.28 | 0.27 | 1.29 | 0.005 | 0.006 | 0.05 | 0.024 | 0.04 | 0.006 |
| 3 | 0.26 | 0.20 | 1.45 | 0.010 | 0.007 | 0.05 | 0.025 | 0.02 | 0.004 |
| 4 | 0.24 | 0.26 | 1.48 | 0.004 | 0.006 | 0.07 | 0.020 | 0.03 | 0.004 |
| 5 | 0.25 | 0.18 | 1.36 | 0.006 | 0.006 | 0.07 | 0.020 | 0.02 | 0.004 |
| 6 | 0.27 | 0.24 | 1.35 | 0.005 | 0.004 | 0.06 | 0.028 | 0.04 | 0.005 |
Table 2 heats, rolling technology and As rolled mechanical property
Table 3 hardening and tempering process and mechanical property
From table 3, adopt Composition Design of the present invention and rolling, homogeneous tube thermal treatment process, the quenched and tempered state straight slit electric resistance welding petroleum casing pipe produced, meets API SPEC5CT standard to the requirement of P110 grade of steel steel pipe.
Claims (2)
1. a P110 level straight slit electric resistance welding petroleum casing pipe, is characterized in that, chemical composition components by weight percentage is as follows, C:0.24%-0.28%, Si:0.15%-0.30%, Mn:1.25%-1.50%, P :≤0.020%, S :≤0.008%, Ti:0.010%-0.030%, Als:0.02%-0.05%, V:0.050%-0.080%, N :≤0.008%, all the other are Fe and inevitable element.
2. the manufacture method of a kind of P110 grade of steel straight slit electric resistance welding petroleum casing pipe as claimed in claim 1, comprise that hot metal pretreatment, smelting molten steel, external refining and sheet billet continuous casting, continuously cast bloom reheat, rolling, cool, batch, ERW tubulation and homogeneous tube thermal treatment, it is characterized in that:
1) continuous casting process is smelted: hot metal pretreatment, converter smelting-through top blast or top bottom blowing, external refining, the frivolous sulphuring treatment of LF stove and carry out Calcium treatment;
2) rolling technology: continuous casting steel billet is heated to 1180-1250 DEG C through process furnace, with after adopt two-stage control rolling through hot tandem, first stage start rolling temperature is 1100-1230 DEG C, finishing temperature is greater than 960 DEG C, subordinate phase start rolling temperature is less than 950 DEG C, finishing temperature is 800-850 DEG C, rolls rear steel band and cools with the speed of 11-15 DEG C/s, carries out steel strip coiling 500-580 DEG C of temperature;
3) homogeneous tube quenching-and-tempering process: after ERW tubulation, homogeneous tube is heated to 880-940 DEG C, insulation 30-60min, shrend; Again homogeneous tube is heated to 500-560 DEG C, insulation 60-80min, air cooling tempering.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106319374A (en) * | 2015-06-16 | 2017-01-11 | 鞍钢股份有限公司 | N80Q-grade resistance welding petroleum casing pipe and manufacturing method thereof |
| CN106480375A (en) * | 2015-08-31 | 2017-03-08 | 鞍钢股份有限公司 | High-strength resistance welding sleeve and manufacturing method thereof |
| CN107287499A (en) * | 2016-03-31 | 2017-10-24 | 鞍钢股份有限公司 | Oil well pipe for high-temperature-resistant thermal production well and manufacturing method thereof |
| CN108570542A (en) * | 2018-05-15 | 2018-09-25 | 首钢集团有限公司 | The manufacturing method of high-strength steel for oil well pipes |
| CN108754322A (en) * | 2018-06-11 | 2018-11-06 | 鞍钢股份有限公司 | High-strength resistance welding sleeve and manufacturing method thereof |
| CN109539250A (en) * | 2018-10-30 | 2019-03-29 | 西安交通大学 | A kind of low NO and its built-in flue gas recycled introducing device |
| CN110468332A (en) * | 2019-09-02 | 2019-11-19 | 鞍钢股份有限公司 | A kind of thin gauge vertical masonry joint low yield strength ratio high tenacity pipeline roll bending and its manufacturing method |
| CN111996447A (en) * | 2020-08-03 | 2020-11-27 | 鞍钢股份有限公司 | Steel for large thick-wall high-toughness resistance welding sleeve and manufacturing method thereof |
| CN113817960A (en) * | 2021-08-10 | 2021-12-21 | 包头钢铁（集团）有限责任公司 | N80 petroleum casing pipe steel and preparation method thereof |
| US11466333B2 (en) | 2017-09-11 | 2022-10-11 | Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. | Continuous hot rolled coil for high collapse-resistant sew petroleum casing and manufacturing method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106319374A (en) * | 2015-06-16 | 2017-01-11 | 鞍钢股份有限公司 | N80Q-grade resistance welding petroleum casing pipe and manufacturing method thereof |
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| CN107287499A (en) * | 2016-03-31 | 2017-10-24 | 鞍钢股份有限公司 | Oil well pipe for high-temperature-resistant thermal production well and manufacturing method thereof |
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