CN103409702A - Seamless steel pipe for L830Q pipeline containing rare earth and production method of seamless steel pipe - Google Patents
Seamless steel pipe for L830Q pipeline containing rare earth and production method of seamless steel pipe Download PDFInfo
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- CN103409702A CN103409702A CN2013102416233A CN201310241623A CN103409702A CN 103409702 A CN103409702 A CN 103409702A CN 2013102416233 A CN2013102416233 A CN 2013102416233A CN 201310241623 A CN201310241623 A CN 201310241623A CN 103409702 A CN103409702 A CN 103409702A
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Abstract
The invention provides a seamless steel pipe for an L830Q pipeline containing rare earth and a production method of the seamless steel pipe, belonging to the technical field of metallurgy and molding. The seamless steel pipe is prepared from 90wt% of blast furnace molten iron and 10wt% of high-quality waste steel; a pipe blank comprises 0.07-0.13wt% of C, 0.15-0.35wt% of Si, 1.60-1.90wt% of Mn, less than or equal to 0.020wt% of P, less than or equal to 0.010wt% of S, 0.60-0.90wt% of Cr, 0.10-0.20wt% of Mo, 0.10-0.30wt% of Ni, 0.06-0.12wt% of V, 0.01-0.03wt% of Ti, 0.01-0.04wt% of Al, 0.0005-0.0100wt% of RE, and less than 0.10wt% of Cu; and the process flow comprises the steps of molten iron pretreatment, converter smelting, LF (ladle furnace) refining, VD (vacuum degassing) vacuum treatment, round blank continuous casting, cutting, pipe blank heating, punching, continuous rolling, sizing, cooling, saw cutting, heat treatment, straightening, flaw detection and chamfering. According to the seamless steel pipe, the yield strength is 850-920MPa, the tensile strength is 930-1030MPa, the yield ratio is less than or equal to 0.90, the extensibility is more than or equal to 20%, the side knock value at -20 DEG C is more than or equal to 100J/cm<2>, the shear ratio is 100%, the grain size is more than or equal to 8.0 level, and the residual stress is more than or equal to 36MPa.
Description
One, affiliated technical field:
The invention belongs to ferrous metal smelting and stress metal processing technique field, relate to a kind of rare earth high-strength high-ductility LS30Q seamless steel pipe for line pipe and production method thereof of containing.
Two, background technology:
Pipeline transportation, because it has economical and efficient, the characteristics such as uninterrupted and pollution-free are used widely, in order to realize the long-distance transportation of pipeline, needs to adopt high pressure to carry; For the laying cost that reduces pipeline and the use that reduces steel, need to adopt high grade of steel thin-walled tube; In order to guarantee the welding property of line pipe, need to adopt the low-carbon-equivalent Composition Design, although low-carbon-equivalent and high strength concern contradiction each other.LS30Q is exactly the superelevation grade of steel that adapts to a kind of pipe string of the demand, has in succession carried out the development work of relevant L830Q grade of steel line pipe both at home and abroad.But the content of relevant this grade of steel weldless steel tube and manufacture method thereof, have no record, on the books and periodicals magazine, also have no open report in patent documentation.
At present, the throughput of the standby X120 Grade Pipeline Steel of several furniture is only arranged both at home and abroad, and declared patent, the Chinese invention patent of wherein declaring with the first machine works of North China Petroleum Authority " the made straight-line joint submerged arc welding tube of a kind of X120 pipe line steel and manufacturing process thereof " (number of patent application: 200710185345.9) ripe, not only described the process for making from the steel plate to the welded tube in detail, but also provide the Composition Design of pipe line steel, this steel grades design is of universal significance, but also has following problem:
The chemical composition design complexity, steel grade be take the high Mn steel of ultralow C-and is basis, alloying elements cr, Mo, Ni and the Cu of the certain content of compound interpolation, compound micro-alloy element Nb, V, Ti and the B of having added also simultaneously, not only production difficulty is large, and production cost is also very high.
Three, summary of the invention:
The purpose of this invention is to provide that a kind of production cost is low, the toughness and tenacity coupling is high, homogeneous microstructure is tiny, unrelieved stress is low contains rare earth seamless steel pipe for line pipe and production method thereof.
The object of the present invention is achieved like this:
Using the high-quality steel scrap of the blast-melted of weight percent 90% and 10% as raw material.
With following technical process, produce: at first to the above-mentioned blast-melted pre-treatment of carrying out, then with above-mentioned high-quality steel scrap, together add top and bottom combined blown converter to smelt, the ladle of again molten steel of having smelted being packed into enters furnaceman LF position and carries out refining, after refining completes, enter the VD station and carry out Fruit storage, carry out again round billet continuous casting, and continuously cast bloom is cut into to pipe, then continuously cast billet for pipe-making is heated, the pipe heated is bored a hole and made it become Continuous Seamless Tube Mill with tandem rolling, tube rolling is carried out after sizing to send into cold bed cooling, then implement sawing, the sleeve pipe cut is heat-treated, then align, finally by carrying out flaw detection, eligible is the line pipe finished product after chamfered edge processing.
Its brief description of the process is: hot metal pretreatment → top and bottom combined blown converter smelting → LF stove refining → VD vacuum-treat → round billet continuous casting → cutting → heating of pipe blank → perforation → tandem rolling → sizing → cooling → sawing → thermal treatment → aligning → flaw detection → chamfered edge.
The production process of continuous casting circular tube blank is as described below:
1, by blast-melted through pre-treatment, make the S amount of containing (weight percent) in molten iron be reduced to below 0.010%.
2, pretreated molten iron is blended into to top and bottom combined blown converter, add (weight percent) 10% high-quality steel scrap, adopt single slag technique to smelt, control finishing slag basicity and terminal target, in tapping process, carry out deoxidation alloying, final deoxygenation adopts aluminium deoxidation technique, and tapping process must pushing off the slag or skimmed, and adds the lime piece after the tapping process interalloy adds.
3, at the LF stove, carry out concise: the refining whole process is normally blown Ar on request, adopts from rudimentary and counts to the mode that senior number improves heat-up rate gradually and heat temperature raising; According to converter molten steel composition and temperature, carry out slag making desulfurization, composition adjustment and warming temperature; The white slag operation is made in employing.
4, the refining of LF stove keeps bottom soft blow Ar after finishing, by predetermined add-on feeding rare-earth wires.
5, carry out VD vacuum-treat: vacuum tightness≤0.10KPa, dark vacuum time >=13 minutes.
6, feeding fixed length silico-calcium silk, carry out blowing in 8-10 minute Ar after hello silk; Molten steel after the VD vacuum-treat is carried out to round billet continuous casting, adopt the constant speed of low pulling rate to control and induction stirring technique; Control molten steel overheat; Strand is after aligning, and flame cutting is circular pipe blank.
Pipe is carried out to the chemical composition chemical examination, and the chemical composition of pipe should meet following requirement (weight percent %): C0.07-0.13; Si 0.15-0.35; Mn 1.60-1.90; P≤0.020; S≤0.010; Cr 0.60-0.90; Mo 0.10-0.20; Ni 0.10-0.30; V 0.06-0.12; Ti 0.01-0.03; Al 0.01-0.04; Rare earth elements RE 0.0005-0.0100; Cu<0.10; Surplus is matrix Fe and the micro impurity element that can't detect.
Described rare earth elements RE is the norium of Ce, La, and their weight percent is respectively: Ce 67%, La 33%.
Add rare earth element to play and improve the effects such as non-metallic inclusion form, strengthening crystal boundary and crystal grain thinning, thereby obtain refined crystalline strengthening and the effect that improves impelling strength.
Composition is chemically examined to the continuous casting circular tube blank that qualified and sufur printing is not more than 2.0 grades and carry out tubulation, the tubulation process is as follows:
Pipe is put into to process furnace and heat, continuous review the temperature of each sections such as process furnace preheating section, heating zone, soaking zone controlled well, the span of control of each section temperature is in Table 1;
The control of each section of table 1 rotary heating furnace temperature (℃)
With microcomputer, each section of process furnace temperature is carried out automatically controlling and automatic record.
Hot tool must be measured before use, rolls front necessary inspection, processes roller-way, avoids scratching tube wall.
To after the pipe perforation heated, be rolled into the weldless steel tube of required specification in corresponding continuous rolling-tube unit, during rolling, every batch is carried out once heat sampling at least, checks geometrical dimension; After cooling on cold bed, carry out the scale sawing; The steel pipe of dimensional precision passed examination is heat-treated again, strictly control quenching heating furnace furnace temperature, add thermostability and cooling water flow, guarantee the quenching quality; Strict furnace temperature and the temper resistance of controlling the tempering process furnace.
Heat treating regime is: after 880～930 ℃ of insulation 30～50min, carry out shrend, 550～600 ℃ of laggard line spaces of insulation 60～80min are cold; After tempering, carry out the band temperature correction straight, straightening temperature >=480 ℃.
Then steel pipe is pursued to the Zhi Jinhang carrying out flaw detection, eligible carries out chamfered edge processing at two ends.
Through above-mentioned technological process, can produce " the L830Q seamless steel pipe for line pipe that contains rare earth " of the present invention.
The beneficial effect of the invention:
1, because this product does not contain noble element Nb, Cu and B, so production cost is relatively low, the production difficulty less;
2, owing to more than 480 ℃, being with temperature correction straight, the unrelieved stress of steel pipe is lower, unrelieved stress≤36MPa (adopting the ring cutting method);
3, because " containing the unique component design of rare earth element ", in conjunction with ripe production technique, makes the properties excellence of steel pipe, the specific performance index is as follows:
Yield strength: 850～920MPa; Tensile strength: 930～1030MPa; Yield tensile ratio≤0.90; Unit elongation>=20%; Traverse impact value a in the time of-20 ℃
KV>=100J/cm
2Shear ratio: 100%; Grain fineness number>=8.0 grade; Unrelieved stress≤36MPa.
The present invention is directed to the problem existed in background technology, by technical measures such as " unique chemical composition design and the blast-melted unique production technique as raw material of take ", solved well the problems referred to above, obtained significant progress.
Four, embodiment:
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1:
Raw material is by weight percentage: blast-melted 90%, and high-quality steel scrap 10%.
The technological process of production is sequentially: hot metal pretreatment → top and bottom combined blown converter smelting → LF stove refining → VD vacuum-treat → round billet continuous casting → cutting → heating of pipe blank → perforation → tandem rolling → sizing → cooling → sawing → thermal treatment → aligning → flaw detection → chamfered edge.
The concrete technological process of production is summarized as follows:
90 tons of blast-melted use " metal magnesium powder " are done to the desulfating and deoxidation pre-treatment, make the S amount that contains in molten iron be reduced to (weight percent) below 0.010%;
Described 90 tons of preprocessed molten irons are blended in the top and bottom combined blown converter of 100 tonnes, add again 10 tons of high-quality steel scraps, then adopt single slag technique to smelt, finishing slag basicity is controlled by 3.0, during tapping, adopt silicomanganese, ferromanganese and ferrochrome to carry out deoxidation alloying, final deoxygenation adopts aluminium deoxidation technique, the necessary pushing off the slag of tapping process, pushing off the slag unsuccessfully must be skimmed, and after the tapping process interalloy adds, adds 200kg lime piece.
The molten steel of the having smelted ladle of packing into is entered to furnaceman LF position and carries out refining: normal Argon on request during refining, adopt from rudimentary and count to the mode heat temperature raising that senior number improves heat-up rate gradually; According to converter molten steel composition and temperature, carry out slag making desulfurization, composition adjustment and warming temperature; The white slag operation is made in employing, and nickel plate, molybdenum-iron, vanadium iron and ferro-titanium added in the middle and later periods.
After finishing, the refining of LF stove to keep bottom soft blow Ar, by the rare-earth wires of predetermined add-on feeding certain-length.
Then the good molten steel of refining is carried out to the VD vacuum-treat again: dark vacuum tightness≤0.10KPa, dark vacuum time >=13 minutes; Feed again the silicon-calcium wire of certain-length, feed silk rear 8～10 minutes soft blow Ar of maintenance.
The large bag of molten steel after the VD vacuum-treat is hung on to ladle turret and carry out 5 machine 5 stream round billet continuous castings, during continuous casting, adopt the constant speed of low pulling rate to control and induction stirring technique; Molten steel overheat Δ T≤30 ℃; Strand is aligned after going out the secondary cooling zone territory, with flame cutting, is then circular pipe blank.
To specification, be
Pipe samplingization, check, its chemical composition result of laboratory test (weight percent content) is as follows:
C 0.10; Si 0.23; Mn 1.77; P 0.012; S 0.005; Cr 0.73; Mo 0.17; Ni 0.19; V 0.09; Ti 0.017; Al 0.022; RE 0.0010; Cu 0.009; Surplus is matrix Fe and the micro impurity element that can't detect; Described rare earth elements RE is: the norium that the La of 67% Ce+33% forms, its chemical composition and content thereof are qualified.
Sufur printing: all be no more than 1.0 grades, macroscopic examination is qualified.
The pipe of changing, being up to the standards is carried out to tubulation, and the tubulation process is as follows:
In order to make pipe have good rolling performance, continuous detecting and control preheating section, heating zone, the soaking zone temperature of process furnace, guarantee that heating is thoroughly evenly and not overheated, the temperature of each section of ring furnace is in Table 2:
The control of each section of table 2 rotary heating furnace temperature (℃)
With microcomputer, each section of process furnace temperature is carried out automatically controlling and automatic record.
Hot tool must be measured before use, rolls front necessary inspection, processes roller-way, avoids scratching tube wall.
To after the pipe perforation heated, be rolled into the weldless steel tube that specification is φ 168.3mm * 14.60mm on Φ 159mm PQF tube rolling unit, every batch is carried out once heat sampling, checks geometrical dimension; After cooling on cold bed, carry out the scale sawing; The steel pipe of dimensional precision passed examination is heat-treated again: strictly control quenching heating furnace furnace temperature, add thermostability and cooling water flow, guarantee the quenching quality; Strict furnace temperature and the temper resistance of controlling the tempering process furnace.
Heat treating regime is: after 900 ± 10 ℃ of insulation 45min, come out of the stove and carry out shrend, 570 ± 20 ℃ of laggard line spaces of insulation 70min of tempering temperature are cold.
The steel pipe straightening temperature is 517 ℃, and it is 29MPa that the ring cutting method is measured unrelieved stress.
Through above-mentioned explained hereafter and non-destructive test(ing)(NDT) process, the finished product that eligible namely becomes " containing rare earth superstrength L830Q seamless steel pipe for line pipe " of the present invention.With it, produce sample and carry out mechanical property and microstructure examination.
Through check, the mechanical property detected value of embodiment 1 seamless steel pipe for line pipe that produces is in Table 3.
Table 3 mechanical properties of pipe detected result
Be organized as tempered sorbite+bainite+acicular ferrite, grain fineness number is 9.0 grades.
Embodiment 2:
The proportioning raw materials of embodiment 2, the technological process of production etc. and other technic index are all identical with embodiment 1, difference be its pipe chemical composition content, heat treating regime and steel pipe specification (specification is that φ 168.3mm * 12.70mm), chemical composition detected result (% by weight) is in Table 4:
Table 4 chemical composition detected result (% by weight)
Heat treating regime is: after 900 ± 10 ℃ of insulation 35min, come out of the stove and carry out shrend, 570 ± 20 ℃ of laggard line spaces of insulation 60min of tempering temperature are cold.
The steel pipe straightening temperature is 509 ℃, and it is 31MPa that the ring cutting method is measured unrelieved stress, and the mechanical property detected result of steel pipe is in Table 5.
The mechanical property detected result of weldless steel tube is in Table 5.
Table 5 mechanical properties of pipe detected result
Be organized as tempered sorbite+bainite+acicular ferrite, grain fineness number is 9.0 grades.
Claims (10)
1. a L830Q seamless steel pipe for line pipe that contains rare earth, is characterized in that the blast-melted and high-quality steel scrap 10% that raw material is 90% by weight percent forms, and its chemical composition content by weight percentage is respectively: C 0.07-0.13; Si 0.15-0.35; Mn 1.60-1.90; P≤0.020; S≤0.010; Cr 0.60-0.90; Mo 0.10-0.20; Ni 0.10-0.30; V 0.06-0.12; Ti 0.01-0.03; Al 0.01-0.04; Rare earth elements RE 0.0005-0.0100; Cu<0.10; Surplus is matrix Fe and the micro impurity element that can't detect; The mechanical property of product: yield strength 850～920MPa, unrelieved stress≤36MPa, the traverse impact value>=100J/cm-20 ℃ the time
2,, grain fineness number>=8.0 grade.
2. a kind of L830Q seamless steel pipe for line pipe that contains rare earth according to claim 1, is characterized in that RE is the norium of Ce and La, and its weight percent is: Ce67%, La33%.
3. the production method of the L830Q seamless steel pipe for line pipe that contains rare earth of feature as claimed in claim 1, is characterized in that technological process of production summary is: hot metal pretreatment → top and bottom combined blown converter smelting → LF stove refining → VD vacuum-treat → round billet continuous casting → cutting → heating of pipe blank → perforation → tandem rolling → sizing → cooling → sawing → thermal treatment → aligning → flaw detection → chamfered edge.
4. a kind of production method that contains the L830Q seamless steel pipe for line pipe of rare earth according to claim 3, is characterized in that blast-melted making S content in molten iron be reduced to weight percent below 0.010% through pre-treatment; Pretreated molten iron and high-quality steel scrap are added to top and bottom combined blown converter by design proportion respectively, adopt single slag technique to smelt, control finishing slag basicity and terminal target; In tapping process, carry out deoxidation alloying, final deoxygenation adopts aluminium deoxidation technique, and tapping process must pushing off the slag or skimmed, and adds the lime piece after the tapping process interalloy adds.
5. a kind of production method that contains the L830Q seamless steel pipe for line pipe of rare earth according to claim 3, is characterized in that carrying out refining at the LF stove; The refining whole process is normal Argon on request, adopts from rudimentary and counts to the mode heat temperature raising that senior number improves heat-up rate gradually; According to converter molten steel composition and temperature, carry out slag making desulfurization, composition adjustment and warming temperature; The white slag operation is made in employing.
6. according to the described a kind of production method that contains the L830Q seamless steel pipe for line pipe of rare earth of claim 3 or 5, it is characterized in that after the refining of LF stove finishes keeping bottom soft blow Ar, by predetermined add-on feeding rare-earth wires.
7. a kind of production method that contains the L830Q seamless steel pipe for line pipe of rare earth according to claim 3, is characterized in that carrying out the vacuum treated vacuum tightness≤0.10KPa of VD, dark vacuum time >=13 minutes.
8. according to the described a kind of production method that contains the L830Q seamless steel pipe for line pipe of rare earth of claim 3 or 7, while it is characterized in that the VD vacuum-treat, feeding fixed length silico-calcium silk, carry out blowing in 8～10 minutes Ar after hello silk.
9. a kind of production method that contains the L830Q seamless steel pipe for line pipe of rare earth according to claim 3, while it is characterized in that carrying out round billet continuous casting, adopt constant speed control and the induction stirring technique of low pulling rate and control molten steel overheat≤30 ℃; Strand is aligned after going out the secondary cooling zone territory, then is cut into circular pipe blank.
10. a kind of production method that contains the L830Q seamless steel pipe for line pipe of rare earth according to claim 3, it is characterized in that adopting modifier treatment technique: after 880～930 ℃ of insulation 30～50min, carry out shrend, 550～600 ℃ of laggard line spaces of insulation 60～80min are cold; After tempering, carry out the band temperature correction straight, straightening temperature >=480 ℃.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532138A (en) * | 2015-01-06 | 2015-04-22 | 内蒙古包钢钢联股份有限公司 | Seamless steel tube containing rare earth for L360NO subsea pipeline and production method thereof |
| CN107326262A (en) * | 2017-06-22 | 2017-11-07 | 内蒙古包钢钢联股份有限公司 | The spud leg of marine drilling platform containing rare earth 800MPa seamless steel pipes and its working system method |
| CN109778060A (en) * | 2019-03-26 | 2019-05-21 | 内蒙古锦和稀土功能材料有限公司 | Rare earth alloy and its preparation method and application |
| CN110280592A (en) * | 2019-07-19 | 2019-09-27 | 大冶特殊钢股份有限公司 | A kind of seamless pipe milling method of superstrength alloy |
| CN110484814A (en) * | 2019-08-05 | 2019-11-22 | 中国科学院金属研究所 | A kind of high strength steel seamless pipe and preparation method thereof of aerospace containing rare earth |
| CN112375977A (en) * | 2020-10-30 | 2021-02-19 | 包头钢铁（集团）有限责任公司 | Rare earth microalloyed seamless steel tube for Q390 steel grade structure and production method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09111344A (en) * | 1995-10-18 | 1997-04-28 | Nippon Steel Corp | Production of high strength and low yield ratio seamless steel pipe |
| CN102199736A (en) * | 2010-03-23 | 2011-09-28 | 宝山钢铁股份有限公司 | High-strength and anti-CO2/H2S corrosion seamless gathering-line pipe |
| CN102251180A (en) * | 2011-07-07 | 2011-11-23 | 内蒙古包钢钢联股份有限公司 | Rare-earth-containing ultrahigh strength collapse-resistant petroleum casing and production method thereof |
| CN102367550A (en) * | 2011-10-28 | 2012-03-07 | 内蒙古包钢钢联股份有限公司 | Rare-earth-containing wet H2S corrosion resisting steel pipe used in heat exchanger, and production method thereof |
| CN102560284A (en) * | 2012-02-21 | 2012-07-11 | 宝山钢铁股份有限公司 | High-strength high-toughness X100 pipeline steel hot-rolled steel strip and manufacturing method thereof |
-
2013
- 2013-06-18 CN CN2013102416233A patent/CN103409702A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09111344A (en) * | 1995-10-18 | 1997-04-28 | Nippon Steel Corp | Production of high strength and low yield ratio seamless steel pipe |
| CN102199736A (en) * | 2010-03-23 | 2011-09-28 | 宝山钢铁股份有限公司 | High-strength and anti-CO2/H2S corrosion seamless gathering-line pipe |
| CN102251180A (en) * | 2011-07-07 | 2011-11-23 | 内蒙古包钢钢联股份有限公司 | Rare-earth-containing ultrahigh strength collapse-resistant petroleum casing and production method thereof |
| CN102367550A (en) * | 2011-10-28 | 2012-03-07 | 内蒙古包钢钢联股份有限公司 | Rare-earth-containing wet H2S corrosion resisting steel pipe used in heat exchanger, and production method thereof |
| CN102560284A (en) * | 2012-02-21 | 2012-07-11 | 宝山钢铁股份有限公司 | High-strength high-toughness X100 pipeline steel hot-rolled steel strip and manufacturing method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532138A (en) * | 2015-01-06 | 2015-04-22 | 内蒙古包钢钢联股份有限公司 | Seamless steel tube containing rare earth for L360NO subsea pipeline and production method thereof |
| CN107326262A (en) * | 2017-06-22 | 2017-11-07 | 内蒙古包钢钢联股份有限公司 | The spud leg of marine drilling platform containing rare earth 800MPa seamless steel pipes and its working system method |
| CN109778060A (en) * | 2019-03-26 | 2019-05-21 | 内蒙古锦和稀土功能材料有限公司 | Rare earth alloy and its preparation method and application |
| CN110280592A (en) * | 2019-07-19 | 2019-09-27 | 大冶特殊钢股份有限公司 | A kind of seamless pipe milling method of superstrength alloy |
| CN110484814A (en) * | 2019-08-05 | 2019-11-22 | 中国科学院金属研究所 | A kind of high strength steel seamless pipe and preparation method thereof of aerospace containing rare earth |
| CN112375977A (en) * | 2020-10-30 | 2021-02-19 | 包头钢铁（集团）有限责任公司 | Rare earth microalloyed seamless steel tube for Q390 steel grade structure and production method thereof |
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Application publication date: 20131127 |