CN107142427B - A kind of spiral forming X80 steel-grade marine riser supervisor and its manufacturing method - Google Patents
A kind of spiral forming X80 steel-grade marine riser supervisor and its manufacturing method Download PDFInfo
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- CN107142427B CN107142427B CN201710284486.XA CN201710284486A CN107142427B CN 107142427 B CN107142427 B CN 107142427B CN 201710284486 A CN201710284486 A CN 201710284486A CN 107142427 B CN107142427 B CN 107142427B
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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
- C22C38/18—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- 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
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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
- C22C38/18—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
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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
- C22C38/18—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
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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
- C22C38/18—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
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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
- C22C38/18—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
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- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
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- Earth Drilling (AREA)
- Heat Treatment Of Steel (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a kind of spiral forming X80 steel-grade marine riser supervisors, the chemical component of the marine riser supervisor is C :≤0.04~0.08% according to mass percent, Si:0.15~0.35%, Mn:1.55~1.85%, P :≤0.012%, S :≤0.004%, Ni:0.15~0.30%, Cr:0.15~0.30%, Cu:0.10~0.30%, Mo:0.15~0.30%, Nb:0.03~0.06%, V :≤0.06%, Ti :≤0.06%, Al :≤0.04%, its carbon equivalent Ceq≤0.45%, CEpcm≤0.22%, remaining is iron and inevitable impurity；For the marine riser supervisor using hot-rolled coil as raw material, Main Tissues are the compound fine grained textures of ten bainite of acicular ferrite.The X80 marine riser of spiral forming of the invention is responsible for, and not only intensity is high, dimensional accuracy is high, but also the excellent combination properties such as anti-fatigue performance, break resistance and corrosion resistance.
Description
Technical field:
The present invention relates to petroleum pipe technical fields, and in particular to a kind of spiral forming X80 steel-grade marine riser supervisor and its
Manufacturing method.
Background technique:
As the mankind constantly increase energy demand, ocean has become the frontier of global resources exploitation, marine drilling
Marine riser supervisor is an important equipment unit of Offshore Drilling Riser system, it is the weight for connecting subsea wellheads and drill ship
Want component, technical requirement is higher, and the geometric accuracy of especially Welded Pipe is put forward higher requirements, development difficulty compared with
Greatly, be it is a kind of with high risk, the petroleum drilling and mining of highly difficult, high-tech, high added value equipment.
In recent years, Offshore Drilling Riser adapts to sea water advanced ability and alreadys exceed 3000 meters.There is offshore drill at present
The country of well marine riser development ability only has the countries such as the U.S., Norway, Japan, France, and Deep Water Drilling Riser system is integrally set
Meter is only grasped by a few company with analytical technology.In recent years, although China is in Offshore Drilling Riser theoretical research side
A few thing has been done in face, and certain experience is had accumulated in terms of marine riser maintenance, but not can enter substantive formation always and produced
The product stage reaches production domesticization engineer application.
Stability failure of the marine riser in deep-sea extreme environment is the Main Patterns that it is destroyed, once part occurs
Conquassation, will induce buckle propagation, leads to pipeline global failure, and consequence is extremely serious, therefore preventing pipeline conquassation failure is to ensure
Deep-sea structure has to safely the critical issue solved.As drilling water-separation pipe be responsible for, in order to prevent because of hydraulic pressure caused by
It collapses and is crushed, using small diameter tube, big wall thickness, that is, small radius-thickness ratio (D/t) line pipe, and require high circularity, and for pipeline
For the material of pipe, in order to fight due to external pressure in the compression stress generated along pipe circumferential direction, higher compression strength is needed.
The publication No. announced for 2014 is the patent of invention of CN103556079A, and a kind of entitled anti-fatigue performance is excellent
High-intensitive marine riser supervisor and its manufacturing method, the chemical component of marine riser supervisor is C :≤0.04~0.08%, Si:0.15~
0.35%, Mn:1.55~1.85%, P :≤0.015%, S :≤0.003%, Ni≤0.30%, Cr≤0.30%, Cu≤
0.25%, Mo≤0.25%, Nb 0.02~0.06%, V :≤0.06%, Ti0.008~0.06%, Al0.010~0.04%,
N≤0.008%, Al/N >=3, Ni+Cu+Mo+Cr≤0.70%, Nb+V+Ti≤0.12%, surplus be iron and inevitably it is miscellaneous
Matter, carbon equivalent Ceq≤0.45%, cold crack FACTOR P cm≤0.23%, and by JCOE form manufacture vertical masonry joint submerged arc ocean every
Water pipe supervisor, the manufacturing method are different from the present invention.The present invention uses spiral forming, and relative to the straight seam welded pipe, there have to be very good
Crossing ellipsization degree and end face squareness, welding residual stress biggish tee welding when avoiding site girth welding reduces production
A possibility that raw crackle, and spiral welded pipe is better than straight seam welded pipe in terms of crack arrest characteristic.
The notification number of bulletin in 2015 is that the notification number of CN103540834B and 2016 year bulletin is CN103484788A's
Patent of invention belongs to one-step method, all mainly includes uncoiling, leveling, milling side, molding, interior weldering, outside weld, Length-fixing cutting, pipe end expansion
Diameter, ultrasonic examination, X-ray examination, hydraulic pressure, pipe end chamfered edge, finished product inspection.The present invention uses the pre- astute and able technique of two-step method, will
Molding is separated with welding, i.e., tack welding process is completed on welded pipe units production line, and inside and outside astute and able technique is in offline astute and able rack
It is upper to be soldered into using multifibres, to improve formed precision, the tensile stress when forming welding to weld seam is eliminated, weld seam is avoided
Defect further improves the geometric dimension and production efficiency of tube body.The present invention uses high rigidity strength forming device, passes through optimization
The structure of roll shape, roll spacing and the arrangement of three-roll bending machine structure, external control roller, so that small diameter tube, big wall thickness spiral welded pipe structure
Stress is low, and geometric dimension is stablized.
Summary of the invention:
The purpose of the present invention is to provide a kind of spiral forming X80 steel-grade marine riser supervisor and its manufacturing method, the present invention
Marine riser supervisor caliber be Ф 533.4mm, wall thickness 25.4mm, marine riser main tube body transverse direction and longitudinal direction yield strength >=
555MPa, tensile strength >=625MPa, tube body transverse direction and longitudinal direction yield tensile ratio≤0.90, welding point tensile strength >=625MPa,
It laterally drops hammer at 0 DEG C and with lower tube body average shear area >=85, monodrome section of shear >=75%, 0 DEG C and with lower tube body and weldering
Connect crack tip opening displacement CTOD characteristic value δ m >=0.254mm of joint, tube body and welding point highest hardness value town 260
>=HV10, eccentricity≤5.5%, ovality≤0.3%, straightness≤0.05%, and in simulated seawater external pressure
Tube body is without Depression Instability or conquassation phenomenon.
In order to solve the above technical problems, the technical solution adopted by the present invention is a kind of spiral forming X80 steel-grade marine riser master
The chemical component of pipe, the marine riser supervisor is C :≤0.04~0.08%, Si:0.15~0.35%, Mn:1.55~
1.85%, P :≤0.012%, S :≤0.004%, Ni:0.15~0.30%, Cr:0.15~0.30%, Cu:0.10~
0.30%, Mo:0.15~0.30%, Nb:0.03~0.06%, V :≤0.06%, Ti :≤0.06%, Al :≤0.04%,
Carbon equivalent Ceq≤0.45%, CEpcm≤0.22%, remaining is iron and inevitable impurity, and the marine riser supervisor is with hot rolling
Roll bending is raw material, and Main Tissues are the compound fine grained textures of ten bainite of acicular ferrite.
The manufacturing method of above-mentioned spiral forming X80 steel-grade marine riser supervisor, comprising: uncoiling, leveling, milling side, pre-bending, at
Type, prewelding, cutting, interior weldering, outside weld, ultrasonic examination, X-ray examination, pipe end be expanding, hydraulic pressure, pipe end chamfered edge, finished product inspection.
1) leveling: just leveling is carried out after roll bending uncoiling first, then roll bending head is sheared to postwelding, carries out secondary fine
Leveling lays the foundation for control thick-wall small-diameter spiral welded pipe tube body geometric accuracy.
2) roll bending mills side: roll bending is chosen according to the minor diameter of welded tubing design and big wall thickness, the crescent moon for reducing roll bending to the greatest extent is curved,
Interior outside weld bevel angle is 60 °~65 °, 10~12mm of the width of root face behind milling side, with eliminate generate after joint close it is " interior tight outer
Pine " phenomenon obtains the bevel shape for being conducive to small radius-thickness ratio molding occlusion, it is ensured that and two edges end face is concordant when postorder welds,
Guarantee slab joint penetration.
3) spiral forming: high rigidity strength forming device is used, it is desirable that main motor current is higher, by optimizing three-roll bending machine
Roll shape, roll spacing and the arrangement of structure, it is horizontal according to big wall thickness roll bending material object yield strength, using forming by external control mode, pass through
1#, 3# roller cornerite are adjusted, it is main to adjust 2# roller 2.5~3mm of drafts, while interior outer roller spacing and angle are adjusted, eliminate molding
Pouting one's lips in the process, reduces unfitness of butt joint to the greatest extent, it is ensured that after minor diameter and big wall thickness welded tube forming have preferable ovality and compared with
It is exceeded effectively to control spiral submerged welded pipe ovality for low residual stress.
4) prewelding prewelding: is carried out using reel of the carbon dioxide gas arc welding to spiral forming.
5) it cuts: Length-fixing cutting is carried out to the spiral welded pipe being soldered in advance.
6) weldering in: the technique of interior weldering are as follows: number one welding wire uses DC reverse connection, gage of wireElectric current 1350
± 200A, 35 ± 2V of voltage；No. second welding wire is using exchange, gage of wire600 ± 50A of electric current, voltage 37 ±
2V；Speed of welding is 1.0~1.5m/min.
7) outside weld: the technique of outside weld are as follows: number one welding wire uses DC reverse connection, gage of wireElectric current 1350
± 200A, 34 ± 3V of voltage；No. second welding wire is using exchange, gage of wire550 ± 50A of electric current, voltage 38 ±
2V；Speed of welding is 1.0~1.5m/min.
8) water pressure test: stress is used to carry out hydrostatic test for 100% minimum yield strength, it is ensured that tube body and weld seam are not
But the intensity with X80 steel-grade, and hydraulic pressure can control minor diameter, big wall thickness tube body geometric accuracy requirement, after hydraulic pressure,
Make marine riser supervisor that there is lower residual stress.
9) X-ray examination and ultrasonic examination: Welded Joints and pipe mother detect.
10) pipe end slope-mouth process: size is in steel pipe both ends finished edge as requested.
11) appearance and dimension check: according to requiring to measure steel pipe appearance geometric accuracy.
Beneficial effects of the present invention:
1, the present invention makes roll bending master by design of alloy and microstructures Control to marine riser supervisor's tubing
Organize the compound fine grained texture for being controlled as ten bainite of acicular ferrite, it is ensured that tubing has high intensity, high tenacity, corrosion resistant
Erosion and the characteristics such as solderability is good, after guarantee minor diameter and big wall thickness roll bending tubulation welded tube tube body and welding point to intensity, toughness,
The requirement of fatigue resistance and corrosion resistance etc..
2, the present invention is responsible for marine riser the control of spiral forming mode by pre- astute and able two-step method, efficiently solves
Problem is interfered with each other between molding and welding.Using high rigidity strength forming device, 2# roller 2.5~3mm of drafts is adjusted, is protected
It demonstrate,proves small radius-thickness ratio (D/t) spiral welded pipe to have enough pressure and form, and guarantees that tube body and pipe end geometric accuracy conform to
It asks；Interior outside weld X bevel angle is respectively 60 °, width of root face 11mm behind milling side, guarantees that heavy wall coiled sheet can weld in the welding process
Thoroughly, undercut is prevented, and improves seam center.By reducing weld heat input, reduces welding point residual stress and sweating heat is defeated
Enter, improves welding seam tissue capability.
3, the present invention is by the control to marine riser supervisor's welding procedure, using a kind of high Ni novel welding wire, success
The low-temperature flexibility and weld strength for improving X80 steel-grade marine riser supervisor's weld seam reduce the low temperature brittleness transformation temperature of welded tube welding seam
Degree, preferred inside and outside Welding ensure that the intensity of weld seam and toughness are met the requirements.The selection of welding parameter, fully considers Double Wire Welding
In each silk effect, adjust electric current, voltage, elongation, angle and the silk spacing of each silk, it is ensured that the fusion penetration of weld seam and good weldering
Slit looks, according to 25.4mm plate thickness, the selection of outside weld No.1 gage of wireWeldering No.1 in remaining, No. two welding wires and outer
No. two gage of wire are welded to be all made ofLow heat input is selected as far as possible, it is ensured that weld seam has good toughness and appropriate
Hardness.
4,100% minimum yield strength hydrostatic test, dwell time are carried out to the X80 marine riser supervisor after expanding
15s has good circularity after making welded tube forming, and has certain low residual stress.
Specific embodiment:
Embodiment: the manufacturing method of X80 steel-grade Ф 533 × 25.4mm spiral forming marine riser supervisor.
1) raw material: using 1140 × 25.4mm of X80 steel-grade coil of strip, and roll bending chemical composition analysis is as follows:
1 X80 Ф 533 × 25.4mm spiral forming marine riser of table is responsible for chemical composition analysis (wt%)
2 marine riser of table is with high Ni welding wire chemical composition analysis (wt%)
2) milling is existed: upper 60 ° of bevel angle, 60 ° of lower bevel angle, width of root face 11mm after when milling.
3) it forms；Horizontal according to roll bending material object yield strength, using forming by external control mode, accurate measurement controls each forming roller
Position and angle, adjustment turntable angle be 45 ° of 50 ', interior roller angle be 45 ° of 5 ', outer roller angle be 45 ° of 45 ', reasonably adjust 2#
Roller 2.5~3mm of drafts, measurement pipe ring spring-go amount are -20mm, it is ensured that minor diameter and big wall thickness, that is, small radius-thickness ratio (D/t) spiral
There is good circularity and low residual stress after welded tube forming.
4) prewelding and cutting: prewelding is carried out using carbon dioxide gas arc welding, then according to order condition to spiral welding
Pipe carries out about 12 meters of Length-fixing cutting；
5) weldering in: number one welding wire uses DC reverse connection, electric current 1350A, voltage 36V；No. second welding wire is using exchange, electricity
Flow 640A, voltage 38V；Welding wire is all made of high Ni novel welding wire；Speed of welding is 1.30m/min.
6) outside weld: the technique of outside weld are as follows: number one welding wire uses DC reverse connection, electric current 1400A, voltage 34V；No. second weldering
Silk is using exchange, electric current 600A, voltage 36V；Welding wire is all made of high Ni novel welding wire；Speed of welding is 1.30m/min.
7) 100% minimum yield strength hydrostatic test, dwell time 15s the water pressure test: are carried out to the steel pipe after expanding.
8) pipe end slope-mouth process: processing pipe end, and upper bevel angle is 10 °, and lower bevel angle is 30 °, and root face is
1.0±0.5mm。
9) ultrasonic inspection: carrying out 100% ultrasound examination to weld dimensions, produces for detecting expanding, hydraulic pressure
Raw defect.
10) X-ray examination: 100% industrial television inspection is carried out to steel pipe inner and outer welding and pipe end is made film, for detecting
The defect that pipeline section is expanding, hydraulic pressure generates.
11) appearance and dimension check: according to requiring to measure spiral welded pipe appearance geometric accuracy.
12) seen from table 3,533 × 25.4mm of X80 Ф spiral forming marine riser supervisor intensity reaches X80 steel-grade water
It is flat, moderate strength.By table 4 as it can be seen that the high Ni novel welding wire used, is advanced optimized by welding condition, successfully improved
The low-temperature flexibility of X80 steel-grade marine riser supervisor's weld seam, welding point 50%FATT low-temperature flexibility transition temperature reach -40 DEG C,
Novel wlding is developed in harmony with the small-bore high strength helical welded tube of big wall thickness with pipe line steel.By 5~table of table 8 as it can be seen that tube body and weldering
Connector hardness is low, and antifatigue and acid-fast ability is all stronger.By table 9 as it can be seen that tube body and welding point in the seawater operation when
Has the routed ability of certain resistance to compression.
The detection of welded tube main performance is as follows:
1) transverse tensile property.
3 X80 Ф 533 × 25.4mm spiral forming marine riser of table is responsible for cross directional stretch and bend test result
2) Charpy impact toughness, DWTT and bend test result.
4 X80 Ф 533 × 25.4mm spiral forming marine riser of table supervisor impact, DWTT and bend test result
3) welding point Vickers hardness.
It is hard that 5 X80 Ф 533 × 25.4mm spiral forming marine riser of table is responsible for base material, Seam and heat effected zone Vickers
Degree
(HV10)
4) crack tip opening displacement (CTOD) test result.
6 X80 Ф 533 × 25.4mm spiral forming marine riser of table is responsible for CTOD (0 DEG C)
5) apparent size testing result.
7 X80 Ф 533 × 25.4mm spiral forming marine riser of table is responsible for apparent size
6) corrosion resistance testing result.
8 X80 Ф 533 × 25.4mm spiral forming marine riser of table is responsible for anticorrosive test result
7) crush resistance test result.
9 X80 Ф 533 × 25.4mm spiral forming marine riser of table is responsible for apparent size crush resistance
It can be seen that the main performance testing result and X80 steel-grade 533 × 25.4mm of Ф spiral of this spiral welded pipe material object at
The main performance requirements comparison of type marine riser supervisor, the 533 × 25.4mm of X80 steel-grade Ф manufactured using technology of the invention
Spiral forming marine riser supervisor has high intensity, high tenacity, compression strength high, and the characteristics such as excellent corrosion resistance are applicable
Yu Haiyang explores drilling operation.
Claims (1)
1. a kind of manufacturing method of spiral forming X80 steel-grade marine riser supervisor, it is characterised in that: the chemistry of the marine riser supervisor
Ingredient is C:0.044%, Si:0.23%, Mn:1.56%, P:0.008%, S:0.002%, Ni:0.15 according to mass percent
~0.30%, Cr:0.15~0.30%, Cu:0.10~0.30%, Mo:0.20%, Nb:0.03~0.06%, V :≤
0.06%, Ti :≤0.06%, Al :≤0.04%, Nb+V+Ti=0.11%, Cu+Ni+Cr=0.52%, carbon equivalent Ceq≤
0.45%, CEpcm=0.19%, remaining is iron and inevitable impurity；The marine riser is responsible for using hot-rolled coil as raw material,
Main Tissues are the compound fine grained textures of ten bainite of acicular ferrite；Using pre- astute and able two-step method: including uncoiling, leveling, milling
Side, pre-bending, molding, prewelding, cutting, interior weldering, outside weld, ultrasonic examination, X-ray examination, pipe end be expanding, hydraulic pressure, pipe end chamfered edge,
Finished product inspection, the milling side are to be processed into X-type groove and accurate working width using double edge milling machines according to small radius-thickness ratio, milling
Upper 60 ° of bevel angle, 60 ° of lower bevel angle, width of root face 11mm behind side；The molding is by the way of spiral forming, choosing
With big rigidity former, adjusting turntable angle is 45 ° 50 ', and interior roller angle is 45 ° 5 ', and outer roller angle is 45 ° 45 ', adjusts 2# roller
Drafts is 2.5~3mm, while outer roller spacing and angle in adjusting, it is ensured that have after minor diameter and big wall thickness welded tube forming compared with
Good ovality and lower residual stress；The technique of the interior weldering are as follows: number one welding wire use DC reverse connection, electric current 1350A,
Voltage 36V；No. second welding wire is using exchange, electric current 640A, voltage 38V；Speed of welding is 1.3m/min；The technique of the outside weld
Are as follows: number one welding wire uses DC reverse connection, electric current 1400A, voltage 34V；No. second welding wire is using exchange, electric current 600A, voltage
36V；Speed of welding is 1.3m/min；The interior weldering and outside weld are all made of high Ni welding wire, welding point 50%FATT low-temperature flexibility
Transition temperature reaches -40 DEG C, the marine riser main tube body transverse direction and longitudinal direction 560~615MPa of yield strength, tensile strength 630
~655MPa, tube body transverse direction and longitudinal direction yield tensile ratio 0.86~0.90,640~710MPa of welding point tensile strength, at 0 DEG C and with
Lower tube body laterally drops hammer average shear area >=85%, monodrome section of shear >=75%, 0 DEG C and with lower tube body and welding point at
Crack tip opening displacement CTOD characteristic value δ m=0.584mm, eccentricity 3.5%~5.5%, ovality 0.1%~
0.3%, straightness 0.03%~0.05%, and in simulated seawater external pressure situation lower tube body without Depression Instability or conquassation phenomenon.
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| CN108380692A (en) * | 2018-02-12 | 2018-08-10 | 湘潭市智全机械有限公司 | A kind of heavy wall stainless steel minor diameter rotary drum forming method |
| JP7082541B2 (en) * | 2018-07-20 | 2022-06-08 | 三菱重工業株式会社 | Repair welding method |
| CN109014793B (en) * | 2018-09-05 | 2019-09-10 | 中国石油集团渤海石油装备制造有限公司 | A kind of manufacturing method of spiral seam thermometal composite welded pipe |
| CN109852889B (en) * | 2019-04-02 | 2021-01-08 | 鞍钢股份有限公司 | Economical wire rod for 460 MPa-grade weather-resistant stud, production method and stud |
| CN111270152A (en) * | 2020-03-30 | 2020-06-12 | 南京钢铁股份有限公司 | High-plasticity pipeline steel plate and manufacturing method thereof |
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| CN103192234B (en) * | 2013-04-01 | 2015-07-15 | 宝鸡石油钢管有限责任公司 | Spiral molded large-deformation-resistant submerged-arc welding pipe and manufacture method thereof |
| CN103484788B (en) * | 2013-08-31 | 2016-05-04 | 宝鸡石油钢管有限责任公司 | A kind of high-strength X 80 MS spiral submerged welded pipe and manufacture method thereof of hydrogen sulfide corrosion-resistant |
| CN103540834B (en) * | 2013-10-07 | 2015-08-12 | 宝鸡石油钢管有限责任公司 | The X65MS/X70MS spiral submerged welded pipe that a kind of anti-SSCC stress corrosion is excellent and manufacture method thereof |
| CN103556079B (en) * | 2013-10-14 | 2015-10-28 | 宝鸡石油钢管有限责任公司 | The high strength marine riser supervisor that a kind of anti-fatigue performance is excellent and manufacture method thereof |
| CN105624584B (en) * | 2014-11-06 | 2018-02-02 | 中国石油天然气集团公司 | A kind of extremely frigid zones K65 controlled rollings steel plate, straight-line joint submerged arc welding tube and its manufacture method |
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