CN104419868A - P110 externally-thickened oil well tube and manufacturing method thereof - Google Patents
P110 externally-thickened oil well tube and manufacturing method thereof Download PDFInfo
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- CN104419868A CN104419868A CN201310398901.6A CN201310398901A CN104419868A CN 104419868 A CN104419868 A CN 104419868A CN 201310398901 A CN201310398901 A CN 201310398901A CN 104419868 A CN104419868 A CN 104419868A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
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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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
-
- 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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- Mechanical Engineering (AREA)
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a P110 externally-thickened oil well tube and a manufacturing method thereof. The P110 externally-thickened oil well tube is prepared from 0.22%-0.32% of C, 0.15%-0.45% of Si, 1.00%-1.50% of Mn, not greater than 0.03% of P, not greater than 0.03% of S, and the balance of Fe and inevitable impurities. The manufacturing method of the P110 externally-thickened oil well tube comprises the following steps of performing converter smelting, performing external refining, performing billet continuous casting, performing round billet rolling, heating round billets in a ring-shaped furnace, performing tube penetrating in a fungoid type punching machine, rolling the tube in a continuous tube rolling machine, heading and externally thickening the tube end, and performing electric-induction quenching-and-tempering heat treatment. According to the P110 externally-thickened oil well tube and the manufacturing method thereof disclosed by the invention, low-cost C-Mn steel is adopted as a round billet raw material, and noble metals are not added, so that the alloy cost is low; moreover, the steel tube heating time is short, the efficiency is high, the energy is saved and, the consumption is reduced, and the manufacturing period is shortened.
Description
Technical field
The invention belongs to low alloy steel manufacturing technology field, relate generally to a kind of P110 grade of steel external upset oil well pipe and manufacture method thereof.
Background technology
In the kind of seamless tube, oil well is maximum special tubing, and the 1/4(whole world accounting for China's seamless tube consumption accounts for 1/3), its production technology level substantially represent the aggregate level of seamless tube.Along with the continuous exploitation of Global Oil, drilling depth is deepened gradually, higher requirement of strength is proposed to the oil well pipe tubing matched with it, previously, oil field mainly uses the H40 oil well pipe of below tensile strength 414MPa, to 10 several years ago, oil field generally uses the J55 oil well pipe of below yield strength 552MPa, the N80 oil well pipe of more than yield strength 552MPa is widely used till now, and progressively replace J55, H40 product, P110 oil well pipe is the pipe material product of a grade of steel level higher than N80 oil well pipe intensity rank, apply in some darker oil wells at present.
At present, P110 oil well seamless steel pipe generally need implement the thermal treatment of off-line to steel pipe after hot rolling, reach the requirement of strength of needs, i.e. yield strength 758 ~ 965MPa, more than tensile strength 862MPa, simultaneously, also need to meet unit elongation, the requirement of Charpy-V impact power, but the walking-beam furnace formula quenching-and-tempering process of the off-line generally adopted in prior art, no doubt satisfied mechanical property result can be obtained, but its weak point needs the longer heating and thermal insulation time, increase energy consumption, production cycle is longer, cost is higher, instantly and future over a long time in the iron and steel overall background that supply exceed demand under, product profit rate is lower, lack competitive edge.And now and in very long one period in future, the situation difficulty of iron and steel production capacity surplus has change, cost efficiency, the outlet adopting low cost novel process to become iron and steel enterprise to fall over each other to explore.And external upset oil well pipe also occurs that J55, N80 grade of steel can not meet the present situation of all demands, market in urgent need provides the external upset oil well pipe product of P110 grade of steel.
Because the intensity rank of P110 oil well pipe is higher, general hot rolling mode tubulation is adopted to be difficult to reach requirement.Therefore, patent of the present invention explores a kind of mode adopting online electrical induction heating, realize rapid heating to combine with quick cooling, this heat treatment mode effectively can solve the shortcoming and defect that steel tube end part pier slightly thickeies rear normalizing process, possesses performance uniformity consistency good, manufacture efficiency is high, the advantage that cost of alloy is low, produce the weldless steel tube that mechanical property meets P110 requirement, greatly reduce steel pipe heat-up time, shorten the manufacturing cycle, reach the effect reducing manufacturing cost, under within present and very long one period in future, iron and steel production capacity surplus situation is difficult to the background of taking on a new look, there is very strong realistic meaning.
By retrieving domestic and international patent, find the patent relevant to content of the present invention 5, the Chinese patent that the Chinese patent that the Chinese patent that the Chinese patent that publication number is CN200810032583.0, publication number are CN201110421067.9, publication number are CN200910018524.2, publication number are CN200810152866.9, publication number are the Chinese patent of CN200710025383.8.The weak point of above-mentioned CN200810032583.0, CN201110421067.9, CN200910018524.2 tri-parts of patents is that its invention product exists weld seam, increases the risk lost efficacy in using.Containing precious metal Cr in the formula for a product of CN200810152866.9 patent, add cost of alloy, economy is slightly poor, and weak point is also the manufacturing process and the thermal treatment process that do not provide steel pipe.Containing the precious metal such as Mo, Cr in the formula for a product of CN200710025383.8 patent, increase cost of alloy, do not have economy, product is long for heat treated heat-up time, consume energy higher, the manufacturing cycle is longer is also its weak point.The principal feature of a kind of oil well P110 weldless steel tube of the present invention and manufacture method thereof has been issued in low cost of alloy and manufacturing cost the requirement that mechanical properties of pipe meets P110 oil well pipe, and, the manufacturing process of base material and steel pipe is easy to control, manufacture efficiency higher, have low cost and high efficiency advantage concurrently, product has the stronger market competitiveness.Contrast patent is as follows.
1) publication number is the Chinese patent of CN200810032583.0, a kind of P110 steel pipe adopting hot-rolled sheet coil to be welded through ERW.The deficiency of this invention has be owing to adopting ERW weldprocedure produce at two: one, P, S content requirement strictly controls, require respectively not higher than 0.01%, 0.008%, far above API standard to P110 oil well pipe P, S content not higher than 0.03% requirement, add manufacturing cost; Two is increases of application risk.Current and following severe and in the oil well pipe environment for use of complexity, the comprehensive action that steel pipe will bear tensile, compressive, bending, turn round, P110 Hi-grade steel oil well pipe in particular for deep-well use requires the homogeneity of steel tube performance, quality especially, the weld seam of Welded Steel Pipe is undoubtedly potential critical defect, once there is accident, will be devastating disaster concerning oil well.
2) publication number is the Chinese patent of CN201110421067.9, a kind of straight seam welded steel pipe of P110 grade of steel, composition (wt%): C0.25%-0.30%, Si0.20%-0.28%, Mn1.10%-1.50%, Cr0.15%-0.35%, P≤0.018%, S≤0.002%.The deficiency of this invention has be in alloy formula containing precious metal Cr at three: one, increases cost of alloy; Two is that P, S content requirement is strict, far above API standard to P110 oil well pipe P, S content not higher than 0.03% requirement, add manufacturing cost; Three is increases of application risk, the same.
3) publication number is the Chinese patent of CN200910018524.2, a straight seam welded steel pipe for P110 grade of steel, composition (wt%): C0.10%-0.28%, Si0.12%-0.25%, Mn1.1%-1.6%, P0.03%-0.14%, S0.002%-0.03%, Cr0.2%-0.7%, Nb0.07%-0.17%, V0.05%-0.15%, Ti0.10%-0.22%.The deficiency of this invention has be in alloy formula containing precious metal Cr, V, Nb, Ti at three: one, increases cost of alloy; Two is that P content is higher, affects welding quality; Three is increases of application risk, the same.
4) publication number is the Chinese patent of CN200810152866.9, a round base for P110 steel level oil bushing, composition (wt%): C0.28%-0.34%, Si0.20%-0.35%, Mn1.40%-1.80%, P≤0.025%, S≤0.025%, Cr0.25%-0.34%, Al0.01%-0.03%.The deficiency of this invention has be in alloy formula containing precious metal Cr at two: one, increases cost of alloy; Two is the manufacture method failing to provide steel pipe.
5) publication number is the Chinese patent of CN200710025383.8, a heat treating method for small diameter high steel level oil conduit, composition (wt%): C0.15%-0.50%, Mn0.25%-1.90%, P < 0.03%, S < 0.03%, Cr0.4%-14%, Mo0.25%-1.10%, Ni < 0.99, Cu < 0.35, Si < 1.0.The deficiency of this invention has be in alloy formula containing precious metals such as Cr, Mo, Nis at two: one, increases cost of alloy; Two is that heat-up time of steel pipe is long, increases energy consumption.
Summary of the invention
In view of the deficiency of above-mentioned technology, technical problem to be solved by this invention is to provide a kind of P110 external upset oil well pipe and manufacture method thereof, with meet instantly and future market to this specific demand of P110 grade of steel external upset oil well pipe, its principal feature adopts the C-Mn steel of low cost for circle base raw material, do not add precious metal, cost of alloy is low; Steel pipe is short for heat-up time, and efficiency is high, energy-saving and cost-reducing, shortens the manufacturing cycle.
A kind of P110 external upset oil well pipe, by weight percentage, C0.22%-0.32%, Si0.15%-0.45%, Mn1.00%-1.50%, P≤0.03%, S≤0.03%, surplus is Fe and inevitable impurity to chemical composition.
Preferred alloy component range is as follows, C0.24%-0.28%, Si0.15%-0.30%, Mn1.20%-1.40%, P≤0.02%, S≤0.015%., surplus is Fe and inevitable impurity.
Effect and the design reason of each principal element are as follows:
C: carbon, as the main strengthening element of low alloy steel, is generally in steel and must has element, its beneficial effect is the intensity that can significantly improve steel, and its disadvantageous effect to damage toughness and the weldability of steel, increases shrend crack sensitivity.Because carbon is compared with other strengthening elements, have best economy, therefore, the present invention be make full use of carbon beneficial effect, evade its harmful effect as far as possible, limiting the content range of carbon is 0.22%-0.32%, and preferable range is 0.24%-0.28%.
Si: silicon is in low alloy steel, it is good reductor, ferrite can be solid-solution in again and play strengthening effect, improve the underlying strength of steel, but too high plasticity and the toughness that will reduce steel of content, and increase the oxidization burning loss tendency of heat-treated steel, simultaneously, silicon also has good economy, therefore silicone content of the present invention controls at 0.15%-0.45%, and preferable range is 0.15%-0.30%.
Mn: manganese, in low alloy steel, plays desoxydatoin on the one hand, can also play solution strengthening effect on the other hand, meanwhile, manganese also has the A phase region expanding steel, increases supercooled austenite stability, improves the hardening capacity of steel.Manganese adds in carbon steel can the grain-size of effective refinement steel, and in certain content range, the intensity that can improve steel can improve again the toughness of steel, and manganese can make up the loss of strength caused due to the reduction of carbon content, has good economy.But can increase the segregation tendency of steel when Fe content is too high, therefore the present invention limits the content range 1.00%-1.50% of manganese, preferable range is 0.15%-0.30%.
P, S are the impurity element in steel, and content is more low better, but too low requirement will increase the manufacturing cost of product, therefore the present invention limits P≤0.03%, S≤0.03%, and preferable range is P≤0.02%, S≤0.015%.
Adopt converter smelting-external refining-billet continuous casting-circle base rolling-ring furnace heating circle base-cone mill poling-mandrel rolling mill tube rolling-pipe end pier thick external upset-electro-induction Tempering and Quenching to the steel of the alloying constituent of above design, the temperature after steel pipe continuous rolling controls more than 1000 DEG C; Pier slightly thickeies temperature 1100 ~ 1200 DEG C, and after the thick thickened pipe end of pier, steel pipe carries out γ-F+P phase transformation; Electro-induction mode is adopted to implement modifier treatment, direct-water-quenching behind electrical induction heating to 900 ~ 1000 DEG C, temperature less than 100 DEG C after steel pipe water quenching, then Direct Air-Cooled behind electrical induction heating to 500 ~ 600 DEG C.
Through the P110 high strength external upset oil well pipe that above alloying constituent and manufacturing process obtain, its yield strength is 790 ~ 960MPa, tensile strength 900 ~ 1090MPa, unit elongation 16 ~ 25%, 0 DEG C of Charpy-V impact power Akv Schwellenwert > 30J.
The present invention controls difficulty increasing, reduction tube quality and lumber recovery in line with the continuous casting billet quality avoiding causing and cost of alloy is considered, and does not add the precious metals such as Cr, Mo, Ni to manufacture P110 external upset oil well pipe; Adopt the Steel Pipe Heat of continuously rolling process manufacture to send pier thick external upset, manufacturing process is compact, and production cost is low; Adopt the hardening and tempering process of electrical induction heating to implement thermal treatment, energy-saving and cost-reducing, shorten the manufacturing cycle, avoid thickening at present the pier that oil well pipe generally adopts thick+normalizing process easily produces the problem in strength softening district; Avoid the down-hole failure risk that Welded Steel Pipe causes owing to there is the welding flaws such as weld seam.
Embodiment
Below in conjunction with the invention will be further described, embodiment is only the description to best mode for carrying out the invention, does not have any restriction to scope of the present invention.
Table 1 is the chemical composition of embodiment steel, and its technical process is converter smelting-external refining-billet continuous casting-circle base rolling-ring furnace heating-cone mill poling-tandem rolling tube machine tube rolling-sizing shaping-online thick external upset of pier-online electro-induction Tempering and Quenching.The concrete technology system of embodiment is in table 2, and table 3 is the mechanical property of embodiment steel.
The chemical composition (wt%) of table 1 embodiment
| Classification | C | Si | Mn | P | S | Fe |
| Example 1 | 0.26 | 0.30 | 1.36 | 0.01 | 0.009 | Surplus |
| Example 2 | 0.25 | 0.32 | 1.41 | 0.012 | 0.0084 | Surplus |
| Example 3 | 0.27 | 0.23 | 1.38 | 0.096 | 0.0077 | Surplus |
| Example 4 | 0.29 | 0.19 | 1.25 | 0.013 | 0.010 | Surplus |
| Example 5 | 0.24 | 0.26 | 1.42 | 0.0091 | 0.0086 | Surplus |
| Example 6 | 0.28 | 0.21 | 1.49 | 0.0079 | 0.0093 | Surplus |
The critical process system of table 2 embodiment
The mechanical property of table 3 embodiment steel pipe
Claims (3)
1. a P110 external upset oil well pipe, is characterized in that chemical composition by weight percentage: C0.22%-0.32%, Si0.15%-0.45%, Mn1.00%-1.50%, P≤0.03%, S≤0.03%, and surplus is Fe and inevitable impurity.
2. P110 external upset oil well pipe according to claim 1, it is characterized in that chemical composition by weight percentage: C0.24%-0.28%, Si0.15%-0.30%, Mn1.20%-1.40%, P≤0.02%, S≤0.015%, surplus is Fe and inevitable impurity.
3. the manufacture method of a P110 external upset oil well pipe according to claim 1 and 2, it is characterized in that adopting converter smelting-external refining-billet continuous casting-circle base rolling-ring furnace heating circle base-cone mill poling-mandrel rolling mill tube rolling-pipe end pier thick external upset-electro-induction Tempering and Quenching, the temperature after steel pipe continuous rolling controls more than 1000 DEG C; Pier slightly thickeies temperature 1100 ~ 1200 DEG C, and after the thick thickened pipe end of pier, steel pipe carries out γ-F+P phase transformation; Electro-induction mode is adopted to implement modifier treatment, direct-water-quenching behind electrical induction heating to 900 ~ 1000 DEG C, temperature less than 100 DEG C after steel pipe water quenching, then Direct Air-Cooled behind electrical induction heating to 500 ~ 600 DEG C.
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| CN201310398901.6A CN104419868B (en) | 2013-09-05 | 2013-09-05 | P110 externally-thickened oil well tube and manufacturing method thereof |
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| CN201310398901.6A CN104419868B (en) | 2013-09-05 | 2013-09-05 | P110 externally-thickened oil well tube and manufacturing method thereof |
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| CN104419868B CN104419868B (en) | 2017-02-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106378405A (en) * | 2016-11-30 | 2017-02-08 | 河南兴华机械制造有限公司 | Forging and thickening process for end part of pipe body with equal wall thickness |
| CN112916647A (en) * | 2020-12-30 | 2021-06-08 | 天津钢管制造有限公司 | Method for improving pipe end size precision of deep-sea steel catenary riser |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01228603A (en) * | 1988-03-10 | 1989-09-12 | Sumitomo Metal Ind Ltd | Manufacture of two-phase stainless steel seamless tube |
| JPH0718328A (en) * | 1993-06-30 | 1995-01-20 | Nippon Steel Corp | Manufacture of seamless steel tube having grain refining organization |
| CN101319292A (en) * | 2008-06-03 | 2008-12-10 | 衡阳华菱钢管有限公司 | High ductility N80 oil casing tube and manufacturing method |
| CN101886218A (en) * | 2009-05-16 | 2010-11-17 | 黑龙江建龙钢铁有限公司 | Steel making method of J55-grade 37Mn5 oil casing pipe |
| CN103160752A (en) * | 2011-12-14 | 2013-06-19 | 鞍钢股份有限公司 | High strength seamless steel pipe with excellent low temperature toughness and manufacturing method thereof |
-
2013
- 2013-09-05 CN CN201310398901.6A patent/CN104419868B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01228603A (en) * | 1988-03-10 | 1989-09-12 | Sumitomo Metal Ind Ltd | Manufacture of two-phase stainless steel seamless tube |
| JPH0718328A (en) * | 1993-06-30 | 1995-01-20 | Nippon Steel Corp | Manufacture of seamless steel tube having grain refining organization |
| CN101319292A (en) * | 2008-06-03 | 2008-12-10 | 衡阳华菱钢管有限公司 | High ductility N80 oil casing tube and manufacturing method |
| CN101886218A (en) * | 2009-05-16 | 2010-11-17 | 黑龙江建龙钢铁有限公司 | Steel making method of J55-grade 37Mn5 oil casing pipe |
| CN103160752A (en) * | 2011-12-14 | 2013-06-19 | 鞍钢股份有限公司 | High strength seamless steel pipe with excellent low temperature toughness and manufacturing method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106378405A (en) * | 2016-11-30 | 2017-02-08 | 河南兴华机械制造有限公司 | Forging and thickening process for end part of pipe body with equal wall thickness |
| CN112916647A (en) * | 2020-12-30 | 2021-06-08 | 天津钢管制造有限公司 | Method for improving pipe end size precision of deep-sea steel catenary riser |
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| CN104419868B (en) | 2017-02-08 |
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