CN101898295B - Manufacturing method of high-strength and high-plasticity continuous tube - Google Patents
Manufacturing method of high-strength and high-plasticity continuous tube Download PDFInfo
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Abstract
The invention relates to a manufacturing method of a high-strength and high-plasticity continuous tube. The continuous tube comprises the following chemical components in mass percentage: 0.05-0.12% of C, 0.17-0.37% of Si, 0.60-1.75% of Mn, not more than 0.010% of P, not more than 0.005% of S, 0.20-1.0% of Cr, 0.15-0.45% of Mo, 0.10-0.35% of Ni, 0-0.05% of V, 0-0.03% of Ti, 0.10-0.25% of Cu, 0-0.07% of Nb, 0.02-0.04% of Al, 0.002-0.004% of Ca and the balance of Fe. The manufacturing method comprises the following steps: manufacturing hot-rolled steel coils; longitudinally shearing and butt-welding the steel coils; and producing a straight seam electric-resistance-welded steel tube by using steel bands and welding to obtain welding seams by normalization at the temperature of 930-960 DEG C. Yield strength of the continuous tube reaches 490-800MPa and elongation percentage thereof reaches 28-40%.
Description
Technical field
The present invention relates to a kind of high-strength and high-plasticity (yield strength reaches 490～800MPa, percentage elongation 28～40%) continuous tube making method, be used for industrial gas oil oil gas well drilling or underground work.
Background technology
Manifold technology has considerable technological merit and operation advantage because of it continuously, in World Oil Industry, obtained extensive use, particularly in recent years along with the whole world implementation that reduces cost, coiled tubing is better than the distinguishing feature of routine work technology with it, in exploration of oil and gas field and exploitation, bring into play more and more important effect, and in exploration of oil and gas field, exploitation, drilling well, completion, well workover, operation etc., having more wide application prospect.
More than 20 covers that present China is had are managed working rig continuously all from country's introductions such as the U.S., Canada, price is very expensive, and supporting instrument equipment and working software are subjected to the considerable restraint of foreign corporation, make operating cost high for a long time, be difficult to satisfy oil field user's demand.And, made monopolization by external several companies as the core technology of the continuous pipe of consumable material itself.The continuous pipe production line that China has just built up is in the debug phase, manages the production technology continuously is that all right ripe, also forms series.Connecting pipes coiled sheet patent is existing a plurality of, but does not also match with the continuous tube technology for making.Pipe raw material, tubulation and supporting with it technology and product satisfy the needs that industrial gas oil develops continuously to need formation badly.
Summary of the invention
The purpose of this invention is to provide a kind of manufacturing method of high-strength and high-plasticity continuous tube, adopt low-carbon (LC), multi-element alloyed, and microalloying composition design, manage continuously by controlled rolling and controlled cooling, vertical masonry joint electric resistance welding (ERW) tubulation and follow-up heat treatment technics manufacturing.
A kind of manufacturing method of high-strength and high-plasticity continuous tube of the present invention, the technical scheme of employing is:
1) the chemical composition mass percent of the continuous tube material of high-strength and high-plasticity is as follows:
C:0.05～0.12%; Si:0.17～0.37%; Mn:0.60～1.75%; P :≤0.010%; S :≤0.005%; Cr:0.20～1.0%; Mo:0.15～0.45%; Ni:0.10～0.35%; V:0～0.05%; Ti:0～0.03%; Cu:010～0.25%; Nb:0～0.07%; Al:0.02～0.04%; Ca:0.002～0.004%; Fe: surplus.
2) manufacturing process of the continuous pipe of high-strength and high-plasticity is as follows:
At first, the preparation hot-rolled sheet coil: through the melting of oxygen blow converter, Ca handles, external refining with above-mentioned material (each component), vacuum outgas, continuous casting becomes thickness to be about the heavy slab of 100～250mm, is heated to about 1200 ℃ then, carries out roughing in the time of 950～1100 ℃, in the time of 700～950 ℃, carry out finish rolling, roll 15～30 ℃/s of back cooling velocity, 500～600 ℃ of coiling temperatures, the thickness of making high comprehensive performance is the hot-rolled sheet coil of 2～8mm.
Coiled sheet slitting and butt welding: the hot-rolled sheet coil for preparing is cut into the steel band of 70～300mm by slitter,, should avoids from coiled sheet width 1/2 slitting for reducing the influence of segregation to follow-up tubulation welding.For satisfying steel band and continuously length of tube requirement, need the steel band butt welding is got up, wrench, the processing of plate tail is at 45, adopt Lincoln weld or CO
2The gas shielded arc welding welding manner couples together steel band by 45 ° of inclined weld modes.
Produce vertical masonry joint resistance welded steel pipe with steel band: edges of boards adopt and mill the limit method, accurately control strip width and edges of boards perpendicularity; Adopt row-roll forming process method control panel side wave shape; Adjust welding current, voltage parameter; The amount of compression of control weld seam is at 1.0～2.5mm, and angular aperture θ is controlled at 4～8 °, welds, and speed of welding v is 15～25m/min, and the product of angular aperture θ and speed of welding v is between 100～150m/min degree; Being welded into thickness is that 2～8mm, caliber are the vertical masonry joint electric-resistance-welded steel pipe of 19.1mm～88.9mm.
The normalizing under 930～960 ℃ of conditions of postwelding weld seam, the beginning temperature of water-cooled is at 350～400 ℃ after the control normalizing; Or carry out 900～950 ℃ Integratively normalizing; Or the Integratively that carries out 900～950 ℃ quenches, 500～700 ℃ of tempering; Or carry out 750～780 ℃ Integratively intercritical hardening, 500～650 ℃ of tempering.To obtain desired tissue with good combination property.
The key technical indexes of continuous pipe: yield strength reaches 490～800MPa, and minimum tensile strength reaches 595～900MPa, percentage elongation 28～40%, minimum Charpy ballistic work 80～180J, maximum hardness HRC20～HRC30.
The external diameter scope of pipe is 19.1mm～88.9mm continuously, and wall thickness range is 2～8mm.
The length range of pipe is 1000m～3000m continuously.Can be wound on the suitable mandrel, so that transportation and use.
The invention effect
The present invention includes the chemical composition and the manufacturing process of one group of continuous pipe of high-strength and high-plasticity, overcome the deficiencies in the prior art, form the continuous pipe optimizing components design and the manufacturing process technology of series matching.The continuous pipe of being invented has higher intensity and good plasticity and toughness, welding performance and corrosion resistance; Can be used for industrial gas oil oil gas well drilling or underground work.
The specific embodiment
Embodiment 1:
The chemical composition mass percent of continuous tube material:
C:0.05%; Si:0.21%; Mn:1.75%; P:0.007%; S:0.004%; Cr:0.20%; Mo:0.18%; Ni:0.12%; Cu:0.10%; V:0.05%; Ti:0.02%; Al:0.03%; Ca:0.002%; Fe: surplus.
The manufacturing of pipe continuously:
At first, the preparation hot-rolled sheet coil: through the melting of oxygen blow converter, Ca handles, external refining with above-mentioned material (each component), vacuum outgas, continuous casting becomes thickness to be about the heavy slab of 100mm, is heated to about 1200 ℃ then, carries out roughing in the time of 1000～1100 ℃, in the time of 750～950 ℃, carry out finish rolling, roll 15～20 ℃/s of back cooling velocity, 550～600 ℃ of coiling temperatures, the thickness of making high comprehensive performance is the hot-rolled sheet coil of 2.4mm.
Coiled sheet slitting and butt welding: the hot-rolled sheet coil for preparing is cut into the steel band of 75mm by slitter,, should avoids from coiled sheet width 1/2 slitting for reducing the influence of segregation to follow-up tubulation welding.For satisfying steel band and continuously length of tube requirement, need the steel band butt welding is got up, wrench, the processing of plate tail is at 45, adopt Lincoln weld or CO
2The gas shielded arc welding welding manner couples together steel band by 45 ° of inclined weld modes.
Produce vertical masonry joint resistance welded steel pipe with steel band: edges of boards adopt and mill the limit method, accurately control strip width and edges of boards perpendicularity; Adopt row-roll forming process method control panel side wave shape; Adjust welding current, voltage parameter; The amount of compression of control weld seam is at 1.6～2.0mm, and angular aperture θ is controlled at 6 °, welds, and speed of welding v is 19～21m/min; Being welded into thickness is that 2.4mm, external diameter are the vertical masonry joint electric-resistance-welded steel pipe of 75mm.
The normalizing under 930～960 ℃ of conditions of postwelding weld seam, the beginning temperature of water-cooled is at 350～400 ℃, to obtain to have tiny ferrite and a small amount of pearlitic desirable duplex structure after the control normalizing.
The key technical indexes of continuous pipe: yield strength reaches 496MPa, and tensile strength reaches 595MPa, percentage elongation 40%, maximum hardness HRC20.And have good on-the-spot welding performance and decay resistance.
Embodiment 2:
The chemical composition mass percent of continuous tube material:
C:0.07%; Si:0.31%; Mn:1.55%; P:0.007%; S:0.004%; Cr:0.25%; Mo:0.16%; Ni:0.17%; V:0～0.04%; Ti:0.02%; Cu:0.19%; Nb:0.04%; Al:0.02%; Ca:0.003%; Fe: surplus.
The manufacturing of pipe continuously:
At first, the preparation hot-rolled sheet coil: with above-mentioned material (each component) through the melting of oxygen blow converter, external refining, vacuum outgas, continuous casting becomes thickness to be about the heavy slab of 100mm, be heated to about 1200 ℃ then, in the time of 1000～1100 ℃, carry out roughing, in the time of 730～950 ℃, carry out finish rolling, roll 20～30 ℃/s of back cooling velocity, 550～600 ℃ of coiling temperatures, the thickness of making high comprehensive performance is the hot-rolled sheet coil of 4mm.
Coiled sheet slitting and butt welding: the hot-rolled sheet coil for preparing is cut into the steel band of 135mm by slitter,, should avoids from coiled sheet width 1/2 slitting for reducing the influence of segregation to follow-up tubulation welding.For satisfying steel band and continuously length of tube requirement, need the steel band butt welding is got up, wrench, the processing of plate tail is at 45, adopt Lincoln weld or CO
2The gas shielded arc welding welding manner couples together steel band by 45 ° of inclined weld modes.
Produce vertical masonry joint resistance welded steel pipe with steel band: edges of boards adopt and mill the limit method, accurately control strip width and edges of boards perpendicularity; Adopt row-roll forming process method control panel side wave shape; Adjust welding current, voltage parameter; The amount of compression of control weld seam is at 1.7～2.1mm, and angular aperture θ is controlled at 6 °, welds, and speed of welding v is 19～21m/min; Being welded into thickness is that 4mm, external diameter are the vertical masonry joint electric-resistance-welded steel pipe of 38.1mm.
Postwelding carries out 900～950 ℃ Integratively normalizing, and the beginning temperature of water-cooled is at 350～400 ℃, to obtain to have tiny ferrite and a small amount of pearlitic desirable duplex structure after the control normalizing.
The key technical indexes of continuous pipe: yield strength reaches 585MPa, and tensile strength reaches 640MPa, percentage elongation 35%, maximum hardness HRC22.And have good on-the-spot welding performance and decay resistance.
Embodiment 3:
The chemical composition mass percent of continuous tube material:
C:0.12%; Si:0.35%; Mn:1.45%; P:0.007%; S:0.005%; Cr:0.31%; Mo:0.17%; Ni:0.19%; V:0～0.03%; Ti:0.02%; Cu:0.17%; Nb:0.04%; Al:0.03%; Ca:0.003%; Fe: surplus.
The manufacturing process of pipe is with embodiment 2 continuously.
Postwelding carries out 750～780 ℃ Integratively intercritical hardening, 500～650 ℃ of tempering.To obtain to have tiny ferrite and a small amount of pearlitic desirable duplex structure.
The key technical indexes of continuous pipe: yield strength reaches 595MPa, and tensile strength reaches 670MPa, percentage elongation 37%, maximum hardness HRC22.And have good on-the-spot welding performance and decay resistance.
Embodiment 4:
The chemical composition mass percent of continuous tube material:
C:0.09%; Si:0.25%; Mn:1.44%; P:0.009%; S:0.004%; Cr:0.36%; Mo:0.23%; Ni:0.22%; Ti:0.03%; Cu:0.19%; Nb:0.05%; Al:0.02%; Ca:0.003%; Fe: surplus.
Continuous manufacturing:
At first, the preparation hot-rolled sheet coil: with above-mentioned material (each component) through the melting of oxygen blow converter, external refining, vacuum outgas, continuous casting becomes thickness to be about the heavy slab of 150mm, be heated to about 1200 ℃ then, in the time of 1000～1100 ℃, carry out roughing, in the time of 700～950 ℃, carry out finish rolling, roll 20～30 ℃/s of back cooling velocity, 500～550 ℃ of coiling temperatures, the thickness of making high comprehensive performance is the hot-rolled sheet coil of 5.7mm.
Coiled sheet slitting and butt welding: the hot-rolled sheet coil for preparing is cut into the steel band of 205mm by slitter,, should avoids from coiled sheet width 1/2 slitting for reducing the influence of segregation to follow-up tubulation welding.For satisfying steel band and continuously length of tube requirement, need the steel band butt welding is got up, wrench, the processing of plate tail is at 45, adopt Lincoln weld or CO
2The gas shielded arc welding welding manner couples together steel band by 45 ° of inclined weld modes.
Produce vertical masonry joint resistance welded steel pipe with steel band: edges of boards adopt and mill the limit method, accurately control strip width and edges of boards perpendicularity; Adopt row-roll forming process method control panel side wave shape; Adjust welding current, voltage parameter; The amount of compression of control weld seam is at 1.8～2.4mm, and angular aperture θ is controlled at 7 °, welds, and speed of welding v is 18～20m/min; Being welded into thickness is that 5.7mm, external diameter are the vertical masonry joint electric-resistance-welded steel pipe of 60.3mm.
Postwelding carries out 900～950 ℃ Integratively heating quenching, 600～650 ℃ of tempering.
The key technical indexes of continuous pipe: yield strength reaches 639MPa, and tensile strength reaches 693MPa, percentage elongation 33%, Charpy ballistic work 104J, maximum hardness HRC23.And have good on-the-spot welding performance and decay resistance.
Embodiment 5:
The chemical composition mass percent of continuous tube material:
C:0.10%; Si:0.24%; Mn:0.78%; P:0.010%; S:0.004%; Cr:0.69%; Mo:0.26%; Ni:0.28%; V:0.05%; Ti:0.02%; Cu:0.20%; Fe: surplus.
The manufacturing of pipe continuously:
At first, the preparation hot-rolled sheet coil: with above-mentioned material (each component) through the melting of oxygen blow converter, external refining, vacuum outgas, continuous casting becomes thickness to be about the heavy slab of 250mm, be heated to about 1200 ℃ then, in the time of 1000～1100 ℃, carry out roughing, in the time of 700～950 ℃, carry out finish rolling, roll 20～30 ℃/s of back cooling velocity, 500～550 ℃ of coiling temperatures, the thickness of making high comprehensive performance is the hot-rolled sheet coil of 6.4mm.
Coiled sheet slitting and butt welding: the hot-rolled sheet coil for preparing is cut into the steel band of 245mm by slitter,, should avoids from coiled sheet width 1/2 slitting for reducing the influence of segregation to follow-up tubulation welding.For satisfying steel band and continuously length of tube requirement, need the steel band butt welding is got up, wrench, the processing of plate tail is at 45, adopt Lincoln weld or CO
2The gas shielded arc welding welding manner couples together steel band by 45 ° of inclined weld modes.
Produce vertical masonry joint resistance welded steel pipe with steel band: edges of boards adopt and mill the limit method, accurately control strip width and edges of boards perpendicularity; Adopt row-roll forming process method control panel side wave shape; Adjust welding current, voltage parameter; The amount of compression of control weld seam is at 1.8～2.5mm, and angular aperture θ is controlled at 8 °, welds, and speed of welding v is 18～20m/min; Being welded into thickness is that 6.4mm, external diameter are the vertical masonry joint electric-resistance-welded steel pipe of 73mm.
Postwelding carries out 900～950 ℃ Integratively heating quenching, 600～650 ℃ of tempering.
The key technical indexes of continuous pipe: yield strength reaches 719MPa, and tensile strength reaches 780MPa, percentage elongation 30%, Charpy ballistic work 176J, maximum hardness HRC26.And have good on-the-spot welding performance and decay resistance.
Embodiment 6:
The chemical composition mass percent of continuous tube material:
C:0.12%; Si:0.27%; Mn:0.96%; P:0.009%; S:0.004%; Cr:0.90%; Mo:0.40%; Ni:0.23%; Ti:0.03%; Cu:0.16%; Nb:0.06%; Fe: surplus.
The manufacturing of pipe continuously:
At first, the preparation hot-rolled sheet coil: with above-mentioned material (each component) through the melting of oxygen blow converter, external refining, vacuum outgas, continuous casting becomes thickness to be about the heavy slab of 250mm, be heated to about 1200 ℃ then, in the time of 1000～1100 ℃, carry out roughing, in the time of 700～950 ℃, carry out finish rolling, roll 20～30 ℃/s of back cooling velocity, 500～550 ℃ of coiling temperatures, the thickness of making high comprehensive performance is the hot-rolled sheet coil of 7.6mm.
Coiled sheet slitting and butt welding: the hot-rolled sheet coil for preparing is cut into the steel band of 300mm by slitter,, should avoids from coiled sheet width 1/2 slitting for reducing the influence of segregation to follow-up tubulation welding.For satisfying steel band and continuously length of tube requirement, need the steel band butt welding is got up, wrench, the processing of plate tail is at 45, adopt Lincoln weld or CO
2The gas shielded arc welding welding manner couples together steel band by 45 ° of inclined weld modes.
Produce vertical masonry joint resistance welded steel pipe with steel band: edges of boards adopt and mill the limit method, accurately control strip width and edges of boards perpendicularity; Adopt row-roll forming process method control panel side wave shape; Adjust welding current, voltage parameter; The amount of compression of control weld seam is at 2.0～3.0mm, and angular aperture θ is controlled at 8 °, welds, and speed of welding v is 18～20m/min; Being welded into thickness is that 7.6mm, external diameter are the vertical masonry joint electric-resistance-welded steel pipe of 88.9mm.
Postwelding carries out 900～950 ℃ Integratively heating quenching, 580～630 ℃ of tempering.
The key technical indexes of continuous pipe: yield strength reaches 789MPa, and tensile strength reaches 867MPa, percentage elongation 28%, Charpy ballistic work 156J, maximum hardness HRC28.And have good on-the-spot welding performance and decay resistance.
Claims (1)
1. manufacturing method of high-strength and high-plasticity continuous tube, yield strength 490～800MPa, percentage elongation 28～40%; It is characterized in that:
1) the chemical composition mass percent of material is as follows:
C:0.05～0.12%; Si:0.17～0.37%; Mn:0.60～1.75%; P :≤0.010%; S :≤0.005%; Cr:0.20～1.0%; Mo:0.15～0.45%; Ni:0.10～0.35%; V:0～0.05%; Ti:0～0.03%; Cu:010～0.25%; Nb:0～0.07%; Al:0.02～0.04%; Ca:0.002～0.004%; Fe: surplus;
2) manufacturing process is as follows:
At first, the preparation hot-rolled sheet coil: through the melting of oxygen blow converter, Ca handles, external refining with each component of above-mentioned material, vacuum outgas, continuous casting becomes thickness to be about the heavy slab of 100～250mm, is heated to 1200 ℃ then, carries out roughing in the time of 950～1100 ℃, in the time of 700～950 ℃, carry out finish rolling, roll 15～30 ℃/s of back cooling velocity, 500～600 ℃ of coiling temperatures are made the hot-rolled sheet coil that thickness is 2～8mm;
Coiled sheet slitting and butt welding: the hot-rolled sheet coil for preparing is cut into the steel band of 70～300mm by slitter, should avoids the steel band butt welding being got up from coiled sheet width 1/2 slitting, wrench, the processing of plate tail is at 45, adopt Lincoln weld or CO
2The gas shielded arc welding welding manner couples together steel band by 45 ° of inclined weld modes;
Produce vertical masonry joint resistance welded steel pipe with steel band: edges of boards adopt and mill the limit method, accurately control strip width and edges of boards perpendicularity; Adopt row-roll forming process method control panel side wave shape; Adjust welding current, voltage parameter; The amount of compression of control weld seam is at 1.0～2.5mm, and angular aperture θ is controlled at 4～8 °, welds, and speed of welding v is 15～25m/min, and the product of angular aperture θ and speed of welding v is between 100～150m/min degree; Being welded into thickness is that 2～8mm, caliber are the vertical masonry joint electric-resistance-welded steel pipe of 19.1mm～88.9mm;
The normalizing under 930～960 ℃ of conditions of postwelding weld seam, the beginning temperature of water-cooled is at 350～400 ℃ after the control normalizing; Or carry out 900～950 ℃ Integratively normalizing; Or the Integratively that carries out 900～950 ℃ quenches, 500～700 ℃ of tempering; Or carry out 750～780 ℃ Integratively intercritical hardening, 500～650 ℃ of tempering.
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| JP4535682B2 (en) * | 2003-01-30 | 2010-09-01 | 株式会社ベステックスキョーエイ | Manufacturing method of fuel inlet |
| JP4792778B2 (en) * | 2005-03-29 | 2011-10-12 | 住友金属工業株式会社 | Manufacturing method of thick-walled seamless steel pipe for line pipe |
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| CN101148012A (en) * | 2007-10-15 | 2008-03-26 | 胜利油田孚瑞特石油装备有限责任公司 | Method for processing hollow sucker rod |
| CN101168823B (en) * | 2007-11-30 | 2010-07-07 | 武汉钢铁(集团)公司 | Steel for high-plasticity continuous oil pipe and manufacturing method thereof |
| CN101481995A (en) * | 2008-01-11 | 2009-07-15 | 江苏嘉宝科技制管有限公司 | High steel level petroleum casing pipe and oil pipe manufacturing process |
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