CN101376946B - Manufacturing method of straight welding petroleum casing pipe of steel for 110ksi steel grade - Google Patents
Manufacturing method of straight welding petroleum casing pipe of steel for 110ksi steel grade Download PDFInfo
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- CN101376946B CN101376946B CN200710045336XA CN200710045336A CN101376946B CN 101376946 B CN101376946 B CN 101376946B CN 200710045336X A CN200710045336X A CN 200710045336XA CN 200710045336 A CN200710045336 A CN 200710045336A CN 101376946 B CN101376946 B CN 101376946B
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Abstract
The present invention provides steel used for an NO80Q steel grade longitudinal welded petroleum sleeve; the weight percentage of the chemical components of the steel is as follows: C: 0.15 percent to 0.35 percent, Si: 0.1 percent to 0.5 percent, Mn: 0.8 percent to 1.5 percent, Al: 0.01 percent to 0.05 percent, Mo: 0.1 percent to 0.5 percent, and the rest are Fe and inevitable impurities. The invention also provides a sleeve manufactured with the steel, and a manufacturing method thereof. In the invention, the design of the alloy components is appropriate, the process is convenient and easy to be operated, the production cost of the sleeve is low and can be widely applied in the exploitation and development of petroleum and natural gas.
Description
Technical field
The present invention relates to a kind of straight joint resistance welding oil annular tube steel, sleeve pipe and manufacture method, more particularly, relate to a kind of P110 grade of steel straight welding oil annular tube steel, sleeve pipe and manufacture method.
Background technology
Petroleum and natural gas is exploited with sleeve pipe generally according to API (API) the normal structure production and the supply of material.The API standard code can be made petroleum casing pipe with seamless tube and longitudinal welded pipe.For seamless tube, longitudinal welded pipe has distinguishing features such as production efficiency height, dimensional precision is good, specification limit is wide, cost is low, is manufacturer and oil field user's first-selected kind therefore, is subjected to the favor in market always.
With regard to the straight weld sleeve pipe, traditional production technique is: according to the needs of sleeve pipe performance, design suitable chemical ingredients; Smelting also rolls into hot-rolled sheet coil; Coiled sheet is made the pipe material by moulding and vertical masonry joint resistance welding mode; Steel pipe seam or steel pipe integral are heat-treated; And pipe end is carried out suitable screw thread process, final production goes out qualified petroleum casing pipe.
With regard to P110 level petroleum casing pipe, API standard code: the yield strength Rp of body
0.6Between 758～965MPa, tensile strength R
m〉=862MPa, zero degree transverse impact 〉=20J.
A kind ofly realize that the method for high-intensity performance requirement is at first to obtain high-intensity hot-rolled steel sheet, after the welding only butt welded seam heat-treat the performance requriements that reaches the API standard code.Because P110 level sleeve pipe yield strength is higher, if according to above-mentioned standard code direct production hot rolling plate, bring difficulty can for thereafter operation making sheet and moulding, therefore, should consider to reduce earlier hot-rolled sheet coil intensity as far as possible, then after welding, can realize the high-intensity performance requriements of welded tube product by the thermal treatment of postwelding homogeneous tube, such as making product reach the level of P110 grade of steel by modifier treatment, because weld seam and body have experienced phase transformation simultaneously, homogeneous tube thermal treatment can alleviate weld seam and the structural difference of body effectively, eliminates unrelieved stress, thereby improve the telescopic performance, satisfy the requirement of API standard code.
As JP7173541, adopt the heat treated mode production of postwelding homogeneous tube high strength ERW Welded Steel Pipe, the chemical component weight per-cent of its alloy designs is C:0.1～0.25, Si:0.1～0.5, Mn:1.0～3.0, Mo :≤1.0, Nb:0.015～0.05, Cr:1.0～3.0, P≤0.02, S≤0.02, all the other are Fe and unavoidable impurities.The yield strength of the disclosed steel pipe of this patent documentation is far longer than petroleum casing pipe to the requirement of yield strength between 758～965MPa about 1200MPa, be unsuitable for the production of P110 level petroleum casing pipe.
For obtaining the high grade of steel welded casing of P110 level, and control the yield strength of its hot-rolled sheet coil as far as possible, consider, should adopt the normal carbon manganese steel of higher carbon from the composition design angle.But, for continuous welded tube production,, also need two coiled sheets are carried out CO between end to end except needs carry out the electrical induction heating fusing back extruding welding the plate flanging part
2Shielded welding is so that realize the multireel continuous production.Therefore, from soldering angle, must the carbon equivalent of coiled sheet be limited to some extent.In order to carry out coiled sheet butt welding end to end well, generally all the carbon equivalent of coiled sheet is controlled at below 0.40.In order to obtain higher-strength than under the low-carbon-equivalent, and when homogeneous tube thermal treatment along the complete through hardening of wall thickness, need in material, add alloying element.
Therefore, for effectively addressing the above problem, the present invention proposes a kind of suitable carbon manganese steel composition design, under the situation that adds a small amount of alloying element, design especially with weldprocedure by suitable coiled sheet is rolling, and the last modified thermal treatment of homogeneous tube, obtain the weld seam P110 steel level oil bushing consistent with tube body performance.
Summary of the invention
Purpose of the present invention at first provides a kind of P110 grade of steel straight welding oil annular tube steel.
The present invention also provides the sleeve pipe made from above-mentioned steel.
The present invention also provides above-mentioned telescopic manufacture method.
The object of the present invention is achieved like this:
P110 grade of steel straight welding oil annular tube steel of the present invention, its chemical component weight per-cent is as follows: C:0.15～0.4, Si:0.1～0.8, Mn:0.5～1.8, Al:0.01～0.08, Mo:0.1～0.8, V:0.01～0.1, all the other are Fe and unavoidable impurities.
Chemical composition design principle of the present invention is as follows:
Carbon C:C is a carbide forming element, can improve the intensity of steel, DeGrain when too low, and too Gao Shihui reduces the welding property of steel greatly, and therefore, the content of carbon is comparatively reasonable 0.15～0.4 (each element is identical by weight percentage).
Play deoxidation and improve corrosion proof effect in the silicon Si:Si adding steel, but be higher than 0.8, processing and toughness worsen, and are lower than 0.1 DeGrain, and therefore, the content of silicon is comparatively reasonable 0.1～0.8.
Manganese Mn:Mn is an austenite former, can improve the hardening capacity of steel, and content is not obvious less than effect in 0.5 o'clock, and content increased the microstructure segregation in the steel greatly greater than 1.8 o'clock, influenced the homogeneity of hot rolling microstructure, and therefore, the content of manganese is comparatively reasonable 0.5～1.8.
Aluminium Al:Al has played the effect of desoxydatoin and crystal grain thinning in steel.When add-on is lower than 0.01, DeGrain, add-on surpasses 0.05, the mechanical property variation, therefore, the content of aluminium is comparatively reasonable 0.01～0.08.
Molybdenum Mo:Mo mainly is intensity and the temper resistance that improves steel by carbide and solution strengthening form, and content surpasses the toughness that 0.8 meeting reduces steel, is lower than 0.1 DeGrain, and therefore, the content of molybdenum is comparatively reasonable 0.1～0.8.
Vanadium V:V can crystal grain thinning, forms carbide, improves the intensity and the toughness of steel.But content surpasses 0.1 back DeGrain, and therefore, the content of vanadium is comparatively reasonable 0.01～0.1.
Sleeve pipe of the present invention, it is the sleeve pipe that adopts above-mentioned steel to make, its chemical component weight per-cent is as follows: C:0.15～0.4, Si:0.1～0.8, Mn:0.5～1.8, Al:0.01～0.08, Mo:0.1～0.8, V:0.01～0.1, and all the other are Fe and unavoidable impurities; Described sleeve pipe forms by the homogeneous tube heat treatment process.
Telescopic manufacture method of the present invention, comprise smelting, casting, rolling, cool off, coil into plate, continuously shaped, resistance welding, homogeneous tube thermal treatment and pipe processing, wherein, cooling time≤20s in the described cooling step is cooled to 650～750 ℃ and batches; Described homogeneous tube thermal treatment process is 900～950 ℃ of heat tracing 20～60min, 550～650 ℃ of heat tracing 40～90min after the shrend, tempering.
According to manufacture method of the present invention, wherein be preferably, describedly coil into the coiled sheet that plate obtains yield strength 420～480MPa, help the tubulation moulding of after this carrying out.
According to manufacture method of the present invention, wherein be that rolling temperature is 1200～1300 ℃ in the described rolling step, 800～900 ℃ of finishing temperatures preferably.
According to manufacture method of the present invention, wherein be that described resistance-welding process is bonding power 400～700KW, welding speed 10～20m/min, amount of compression 2～15mm preferably.
According to the present invention, molten steel is through converter or electrosmelting, and conduction of continuous casting becomes slab.Slab rolls into strip after 1200～1300 ℃ of heating, the finishing temperature of strip within rolling in back 20 seconds, is cooled to steel plate rapidly batch below 750 ℃ between 800～900 ℃, obtain coiled sheet, help the tubulation moulding than low yield strength 420～480MPa.Coiled sheet enters continuously shaped operation subsequently, then carries out resistance welding (ERW) under bonding power 400～700KW, welding speed 10～20m/min, amount of compression 2～15mm condition.Shrend behind 900～950 ℃ of heat tracing 20～60min then, tempering behind 550～650 ℃ of heat tracing 40～90min is again carried out whole modified thermal treatment to welded tube.At last, manage processing, obtain high strength P110 petroleum casing pipe.
The present invention has following beneficial effect:
P110 grade of steel straight welding oil annular tube steel of the present invention, sleeve pipe is with low cost, the manufacturing process feasibility is good, can be widely used in the oil and gas exploitation exploitation, its successful design and exploitation will bring huge economic benefit, and its market outlook are very huge.
Embodiment
Below for a more detailed description with embodiment to the present invention.These embodiment only are the descriptions to best mode for carrying out the invention, scope of the present invention are not had any restriction.
Embodiment 1
The steel of present embodiment has chemical ingredients (weight percent meter) C:0.25, Si:0.30, Mn:1.75, Mo:0.20, V:0.011, the Al:0.012 of following content, and all the other are Fe and unavoidable impurities.
Molten steel is through converter smelting, and conduction of continuous casting becomes slab.Slab rolls into strip after 1220 ℃ of heating, the finishing temperature of strip is 850 ℃, within rolling in back 20 seconds, steel plate is cooled to 690 ℃ rapidly batches, and obtains yield strength Rp
0.2For 476MPa, tensile strength Rm are 684MPa, elongation A
50.8mm% is 35.0 coiled sheet.This coiled sheet enters continuously shaped operation subsequently, then carries out resistance welding (ERW) under bonding power 680KW, welding speed 12m/min, amount of compression 8mm condition.Shrend behind 920 ℃ of heat tracing 30min then, tempering behind 550 ℃ of heat tracing 58min is again carried out whole modified thermal treatment to welded tube.At last, manage processing, obtain yield strength Rp
0.6For 921MPa, tensile strength Rm are 981MPa, elongation A
50.8mm% is 22.0, the zero degree transverse impact is the high strength P110 petroleum casing pipe of 58J.
Embodiment 2
The steel of present embodiment has chemical ingredients (weight percent meter) C:0.25, Si:0.30, Mn:1.75, Mo:0.20, V:0.011, the Al:0.012 of following content, and all the other are Fe and unavoidable impurities.
Molten steel is through converter smelting, and conduction of continuous casting becomes slab.Slab rolls into strip after 1300 ℃ of heating, the finishing temperature of strip is 900 ℃, within rolling in back 20 seconds, steel plate is cooled to 700 ℃ rapidly batches, and obtains yield strength Rp
0.6For 458MPa, tensile strength Rm are 675MPa, elongation A
50.8mm% is 33.0 coiled sheet.This coiled sheet enters continuously shaped operation subsequently, then carries out resistance welding (ERW) under bonding power 700KW, welding speed 20m/min, amount of compression 10mm condition.Shrend behind 950 ℃ of heat tracing 20min then, tempering behind 570 ℃ of heat tracing 90min is again carried out whole modified thermal treatment to welded tube.At last, manage processing, obtain yield strength Rp
0.6For 913MPa, tensile strength Rm are 972MPa, elongation A
50.8mm% is 23.0, the zero degree transverse impact is the high strength P110 petroleum casing pipe of 65J.
Embodiment 3
The steel of present embodiment has chemical ingredients (weight percent meter) C:0.15, Si:0.11, Mn:1.23, Mo:0.25, V:0.068, the Al:0.037 of following content, and all the other are Fe and unavoidable impurities.
Molten steel is through converter smelting, and conduction of continuous casting becomes slab.Slab rolls into strip after 1200 ℃ of heating, the finishing temperature of strip is 800 ℃, within rolling in back 20 seconds, steel plate is cooled to 730 ℃ rapidly batches, and obtains yield strength Rp
0.2For 434MPa, tensile strength Rm are 634MPa, elongation A
50.8mm% is 35.0 coiled sheet.This coiled sheet enters continuously shaped operation subsequently, then carries out resistance welding (ERW) under bonding power 550KW, welding speed 15m/min, amount of compression 5mm condition.Shrend behind 930 ℃ of heat tracing 25min then, tempering behind 630 ℃ of heat tracing 50min is again carried out whole modified thermal treatment to welded tube.At last, manage processing, obtain yield strength Rp
0.6For 845MPa, tensile strength Rm are 942MPa, elongation A
50.8mm% is 20.0, zero degree weldering transverse impact is the high strength P110 petroleum casing pipe of 60J.
Embodiment 4
The steel of present embodiment has chemical ingredients (weight percent meter) C:0.30, Si:0.22, Mn:0.80, Mo:0.75, V:0.03, the Al:0.07 of following content, and all the other are Fe and unavoidable impurities.
Molten steel is through converter smelting, and conduction of continuous casting becomes slab.Slab rolls into strip after 1270 ℃ of heating, the finishing temperature of strip is 880 ℃, within rolling in back 20 seconds, steel plate is cooled to 750 ℃ rapidly batches, and obtains yield strength Rp
0.2For 428MPa, tensile strength Rm are 665MPa, elongation A
50.8mm% is 38.0 coiled sheet.This coiled sheet enters continuously shaped operation subsequently, then carries out resistance welding (ERW) under bonding power 400KW, welding speed 10m/min, amount of compression 15mm condition.Shrend behind 900 ℃ of heat tracing 60min then, tempering behind 650 ℃ of heat tracing 40min is again carried out whole modified thermal treatment to welded tube.At last, manage processing, obtain yield strength Rp
0.6For 827MPa, tensile strength Rm are 892MPa, elongation A
50.8mm% is 24.0, the zero degree transverse impact is the high strength P110 petroleum casing pipe of 67J.
Embodiment 5
The steel of present embodiment has chemical ingredients (weight percent meter) C:0.20, Si:0.25, Mn:1.0, Mo:0.12, V:0.07, the Al:0.06 of following content, and all the other are Fe and unavoidable impurities.
Molten steel is through converter smelting, and conduction of continuous casting becomes slab.Slab rolls into strip after 1210 ℃ of heating, the finishing temperature of strip is 800 ℃, within rolling in back 20 seconds, steel plate is cooled to 715 ℃ rapidly batches, and obtains yield strength Rp
0.6For 455MPa, tensile strength Rm are 675MPa, elongation A
50.8mm% is 40.0 coiled sheet.This coiled sheet enters continuously shaped operation subsequently, then carries out resistance welding (ERW) under bonding power 450KW, welding speed 14m/min, amount of compression 2mm condition.Shrend behind 920 ℃ of heat tracing 50min then, tempering behind 610 ℃ of heat tracing 70min is again carried out whole modified thermal treatment to welded tube.At last, manage processing, obtain yield strength Rp
0.6For 889MPa, tensile strength Rm are 901MPa, elongation A
50.8mm% is 22.0, the zero degree transverse impact is the high strength P110 petroleum casing pipe of 56J.
Adopt steel of the present invention and technology, roll the yield strength Rp of back coiled sheet
0.2All less than 480MPa, be easy to moulding, postwelding is by reaching the performance requriements of P110 tubing and casing after the homogeneous tube thermal treatment.
Claims (4)
1. the manufacture method of a P110 grade of steel straight welding oil annular tube, comprise smelting, casting, rolling, cool off, coil into plate, continuously shaped, resistance welding, homogeneous tube thermal treatment and pipe processing, it is characterized in that:
Described sleeve pipe its chemical ingredients by weight percentage is as follows: C:0.15～0.4, Si:0.1～0.8, Mn:0.5～1.8, Al:0.01～0.08, Mo:0.1～0.8, V:0.01～0.1, and all the other are Fe and unavoidable impurities;
Cooling time≤20s in the cooling step of described method is cooled to 690～750 ℃ and batches; The homogeneous tube thermal treatment process of described method is 900～950 ℃ of heat tracing 20～60min, 550～650 ℃ of heat tracing 40～90min after the shrend, tempering.
2. manufacture method as claimed in claim 1 is characterized in that, describedly coils into the coiled sheet that plate obtains yield strength 420～480MPa.
3. manufacture method as claimed in claim 1 is characterized in that, rolling temperature is 1200～1300 ℃ in the described rolling step, 800～900 ℃ of finishing temperatures.
4. manufacture method as claimed in claim 3 is characterized in that, described resistance-welding process is bonding power 400～700KW, welding speed 10～20m/min, amount of compression 2～15mm.
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| CN200710045336XA CN101376946B (en) | 2007-08-28 | 2007-08-28 | Manufacturing method of straight welding petroleum casing pipe of steel for 110ksi steel grade |
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| CN200710045336XA CN101376946B (en) | 2007-08-28 | 2007-08-28 | Manufacturing method of straight welding petroleum casing pipe of steel for 110ksi steel grade |
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| CN101376946B true CN101376946B (en) | 2011-07-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101845583B (en) * | 2009-03-25 | 2015-04-01 | 宝山钢铁股份有限公司 | Petroleum sleeve steel and manufacturing method thereof |
| CN102284839A (en) * | 2011-07-21 | 2011-12-21 | 王锡卿 | Manufacturing method of steel bushing |
| CN102430901A (en) * | 2011-12-14 | 2012-05-02 | 宝鸡石油钢管有限责任公司 | P110 steel level high frequency straight welded pipe manufacturing method |
| CN104561774A (en) * | 2013-10-10 | 2015-04-29 | 鞍钢股份有限公司 | P110-level straight-seam welding petroleum casing pipe and manufacturing method thereof |
| CN105177416B (en) * | 2015-09-11 | 2017-03-29 | 山东钢铁股份有限公司 | A kind of furnace shell heat-resisting steel plate of pressure vessel and its manufacture method |
| CN105861799B (en) * | 2016-05-31 | 2018-01-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Think gauge pipe line steel containing vanadium and its production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101096737A (en) * | 2006-06-28 | 2008-01-02 | 宝山钢铁股份有限公司 | High-strength straight welding oil annular tube steel and manufacturing method thereof |
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| CN101096737A (en) * | 2006-06-28 | 2008-01-02 | 宝山钢铁股份有限公司 | High-strength straight welding oil annular tube steel and manufacturing method thereof |
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| CN 101096737 A,权利要求1. |
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