CN102676925A - Submarine pipeline steel plate with great wall thickness and production method of submarine pipeline steel plate - Google Patents
Submarine pipeline steel plate with great wall thickness and production method of submarine pipeline steel plate Download PDFInfo
- Publication number
- CN102676925A CN102676925A CN201210123639XA CN201210123639A CN102676925A CN 102676925 A CN102676925 A CN 102676925A CN 201210123639X A CN201210123639X A CN 201210123639XA CN 201210123639 A CN201210123639 A CN 201210123639A CN 102676925 A CN102676925 A CN 102676925A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- temperature
- wall thickness
- rolling
- pipeline steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a submarine pipeline steel plate with a great wall thickness and also relates to a production method for the submarine pipeline steel plate. The submarine pipeline steel plate with the great wall thickness comprises the following components in percentage by weight: 0.05-0.07 percent of C, 0.15-0.25 percent of Si, 1.42-1.48 percent of Mn, not more than 0.010 percent of P, not more than 0.002 percent of S, 0.13-0.18 percent of Ni, 0.043-0.048 percent of Nb, 0.020-0.040 percent of Al, 0.014-0.024 percent of Ti, 0.13-0.18 percent of Mo and the balance of Fe and inevitable impurities. The production method for the steel plate comprises the steps of smelting, ladle refining furnace (LF)/vacuum degassing (VD) refining, continuous casting, heating, rolling, water cooling after rolling and obtaining of a finished product. The submarine pipeline steel plate with the great wall thickness, which is disclosed by the invention, has the thickness of 25-30.3 mm and has the advantages of high low-temperature impact toughness, favorable wear resisting performance, high strength, proper yielding-to-tensile ratio and favorable elongation percentage. The submarine pipeline steel plate with the great wall thickness can be widely applied to submarine pipeline construction and has a broad application prospect.
Description
Technical field
The invention belongs to the low-carbon micro steel-alloy field, particularly a kind of big wall thickness subsea pipeline steel plate and working method thereof are applicable to the subsea pipeline engineering that transverse and longitudinal tensile strength and low-temperature flexibility are had relatively high expectations.
Background technology
China's rapid development of economy has in recent years brought being the rapid growth of main energy sources demand with the oil and natural gas; Therefore huge oil and natural gas energy breach can only need a large amount of high added values, high-level oil and gas to carry and use pipeline through seeking new resource and improve oil exploitation technology from input overseas or domestic.This has greatly promoted the exploitation of limit and offshore oil and gas resource and the construction of subsea pipeline, and subsea pipeline shows especially with the importance of steel day by day.
The subsea pipeline steel is on active service among the deep-sea and abominable ocean environment; Pipeline bears deep-sea high pressure and serious marine corrosion; And because the complicacy of seabed physical features and the polytropy of seabed ocean current; Require subsea pipeline to have higher cleanliness factor, higher low-temperature flexibility, higher transverse and longitudinal intensity, so subsea pipeline has been proposed higher stricter performance requriements with steel with steel.And domestic used subsea pipeline steel relies on import mostly at present, and price is higher.The pipe line steel performance index qualification rate of this high transverse and longitudinal strength property of domestic production, high low temperature toughness reguirements and big thickness is very low, has brought bigger financial loss to producer, has brought great hidden also for simultaneously pipe laying engineering and operating safety.
Summary of the invention
The purpose of this invention is to provide a kind of big wall thickness subsea pipeline steel plate and working method thereof, with low-temperature impact toughness, tear resistance and the intensity that improves this steel plate.
In order to realize above purpose, the technical scheme that the present invention adopted has adopted a kind of big wall thickness subsea pipeline steel plate, is made up of following components in weight percentage: C:0.05% ~ 0.07%, Si:0.15% ~ 0.25%; Mn:1.42% ~ 1.48%, P≤0.010%, S≤0.002%; Ni:0.13% ~ 0.18%, Nb:0.043% ~ 0.048%, Al:0.020% ~ 0.040%; Ti:0.014% ~ 0.024%, Mo:0.13% ~ 0.18%, surplus is Fe and unavoidable impurities.
The thickness of described big wall thickness subsea pipeline steel plate is 25 ~ 30.2mm.
The chemical composition design that steel plate of the present invention adopts, carbon, manganese solution strengthening; Add minor N b, V crystal grain thinning, its carbonitride plays dispersion-strengthened action; A spot of molybdenum can suppress austenite recrystallization, and refine austenite crystal grain promotes the transformation of ferritic and bainite; Through follow-up rational heat treatment technology, steel plate has the good mechanical performance.
The effect in the present invention of each component and content is in the steel plate:
C:0.15%-0.17%, carbon produces remarkably influenced to ys, tensile strength, the welding property of steel; Carbon can significantly improve armor plate strength through the gap solid solution, but carbon content is too high, can influence the welding property and the toughness of steel again.
Si:0.15%-0.40%, as reductive agent and reductor, simultaneously Si also can play the solution strengthening effect in steelmaking process, but silicone content can cause the toughness of steel to descend when too high, reduces the welding property of steel.
Mn:1.4%-1.5%, manganese is with low cost, can increase toughness, intensity and the hardness of steel, improves the hardening capacity of steel, improves the hot workability of steel; The manganese amount is too high, is prone to center segregation for big thickness steel plate.
P≤0.012%, S≤0.005%: in the ordinary course of things, p and s all is a harmful element in the steel, increases the fragility of steel; Phosphorus degenerates the welding property of steel, reduces plasticity, and cold-bending property is degenerated; Sulphur reduces the ductility and the toughness of steel, is forging and causing when rolling crackle; Therefore should reduce the content of p and s in steel as far as possible.
Al:0.020%-0.045%, aluminium are reductors commonly used in the steel.Add a spot of aluminium in the steel, but crystal grain thinning improves impelling strength; Aluminium also has oxidation-resistance and corrosion resistance, too high hot workability, welding property and the machinability that then influences steel.
Nb:0.043% ~ 0.048%; The adding of niobium is in order to promote the grain refining of steel rolling microstructure, can improve intensity and toughness simultaneously that niobium can be through suppressing austenite recrystallization in the controlled rolling process; Effective refinement microstructure, and through separating out the reinforcement matrix; Niobium can reduce the superheated susceptivity and the temper brittleness of steel.In the welding process, the alligatoring that gathers and separate out austenite crystal in the time of can hindering heating partially of niobium atom, and guarantee to obtain more tiny heat affected zone tissue after the welding, improve welding property.
Ti:0.014% ~ 0.024%, titanium are good reductors.Steel grade adds carbide, nitride or the carbonitride that Ti can form Ti with C, N element, and these compounds have good grain refining effect.
Ni:0.13% ~ 0.18%, nickel is dissolved in austenite, suppresses austenite recrystallization, and refine austenite crystal grain improves the steel plate low-temperature flexibility.
Mo:0.13% ~ 0.18%, molybdenum can suppress austenite recrystallization, and refine austenite crystal grain promotes ferritic, bainite transformation; In rolling the postcooling process, avoid martensitic formation, and form bainite and ferritic, not enough to remedy the cooling of hot continuous mill laminar flow, thus have good ductility and obdurability.
The present invention also aims to provide a kind of working method of big wall thickness subsea pipeline steel plate, with obtain the low-temperature impact toughness height, tear resistance is good, intensity is high, yield tensile ratio is moderate and the big wall thickness subsea pipeline steel plate of good percentage elongation.
The present invention has adopted a kind of working method of big wall thickness subsea pipeline steel plate, and concrete steps are following:
(1) smelts: will contain following weight percent C:0.05% ~ 0.07%, Si:0.15% ~ 0.25%, Mn:1.42% ~ 1.48%; P≤0.010%, S≤0.002%, Ni:0.13% ~ 0.18%; Nb:0.043% ~ 0.048%, Al:0.020% ~ 0.040%, Ti:0.014% ~ 0.024%; The molten steel of Mo:0.13% ~ 0.18% component is sent into the refining of LF refining furnace then earlier through electrosmelting, when liquid steel temperature meets or exceeds 1560 ± 10 ℃, changes the vacuum outgas of VD stove over to and handles;
(2) continuous casting: adopt 300mm thickness continuously cast bloom to produce, adopt induction stirring, the continuous casting pulling rate is 0.81 ~ 0.85m/min;
(3) heating: billet heating temperature is the highest 1240 ℃, and 1210 ℃ of soaking temperatures, soaking time are 5h;
(4) rolling: adopt recrystallization zone+non-recrystallization district two stage rolling technologies to be rolled, the fs rolling temperature is 950 ~ 1100 ℃, and this stage single pass draught is 10 ~ 20%, and the accumulative total draft is 30 ~ 50%; The subordinate phase rolling temperature is 840 ~ 880 ℃, and the accumulative total draft is 30 ~ 50%; Going into water temp after rolling is 740 ~ 780 ℃, and returning red temperature is 450 ~ 500 ℃, obtains the steel plate bullion.
Feeding Al line adds the CaSi piece before vacuum outgas is handled during the described refining of step (1), discharges non-metallic inclusion, harmful element in the molten steel, guarantees the pure of molten steel, vacuum tightness≤66.6Pa that vacuum outgas is handled, vacuum hold-time>=20min.
The described casting temperature of step (2) is 1535 ~ 1545 ℃.
The described Heating temperature of step (3) is 1220 ~ 1240 ℃, 1180 ~ 1210 ℃ of soaking temperatures.
The described fs of step (4), rolling start rolling temperature was 930 ~ 1100 ℃, and finishing temperature is 920 ~ 970 ℃; The rolling start rolling temperature of subordinate phase is 840 ~ 910 ℃, and finishing temperature is 830 ~ 870 ℃.
Steel plate of the present invention adopts cheap carbon, manganese solution strengthening; Optimize other alloying element proportioning in the steel plate through adjustment; Can under low valuable alloy usage quantity condition, guarantee the steel plate good mechanical properties, make steel plate have favorable tissue and over-all properties, enhance one's market competitiveness; The working method of steel plate of the present invention adopts two stage rolling technologies, has solved the mill milling insufficient pressure and the problem of the thick inequality of crystal grain that causes makes steel plate have excellent comprehensive performances; Low-temperature flexibility has sizable rich amount, can be widely used in the submerged pipeline construction, has a extensive future.
The present invention has the following advantages: steel 1. of the present invention is purer, P≤0.010%, S≤0.002%; 2. the valuable alloy content of steel of the present invention is lower, cheap; 3. good mechanical performance: ys between 470 ~ 570MPa, tensile strength between 535 ~ 760MPa, unit elongation＞30% ,-20 ℃ of ballistic work＞200J, tear resistance (DWTT)＞75%, yield tensile ratio＜0.90; 4. steel plate of the present invention is organized as the complex tissue of ferritic, perlite and bainite.
Description of drawings
Fig. 1 (a) embodiment 1 30.2mm X65MO thickness of slab 1/4 place metallographic structure photo;
Fig. 1 (b) embodiment 1 30.2mm X65MO thickness of slab 1/2 place metallographic structure photo;
Fig. 2 (a) embodiment 2 25mm X65MO thickness of slab 1/4 place metallographic structure photos;
Fig. 2 (b) embodiment 2 25mm X65MO thickness of slab 1/2 place metallographic structure photos;
Fig. 3 (a) embodiment 3 30.2mm X65MO thickness of slab 1/4 place metallographic structure photos;
Fig. 3 (b) embodiment 3 30.2mm X65MO thickness of slab 1/2 place metallographic structure photos.
Embodiment
Embodiment 1
The big wall thickness subsea pipeline steel plate of present embodiment, thickness is 30.2mm, is made up of following components in weight percentage: C:0.07%, Si:0.18%; Mn:1.47%, P:0.009%, S:0.001%; Al:0.04%, Nb:0.045%, Ni:0.15%; Ti:0.017%, Mo:0.15%, surplus is Fe and unavoidable impurities.
The step of the working method of the big wall thickness subsea pipeline steel plate of present embodiment is following:
(1) smelts: will contain following weight percent C:0.07%, Si:0.18%, Mn:1.47%, P:0.009%; S:0.001%, Al:0.04%, Nb:0.045%, Ni:0.15%; Ti:0.017%, the molten steel of Mo:0.15% component is sent into the refining of LF refining furnace then earlier through electrosmelting; When liquid steel temperature meets or exceeds 1566 ℃, change the vacuum outgas of VD stove over to and handle, vacuum tightness is 66Pa; The vacuum hold-time is 25min, adds the CaSi piece before the vacuum-treat and discharges non-metallic inclusion, harmful element in the molten steel, guarantees the pure of molten steel;
(2) continuous casting: adopt 300mm thickness continuously cast bloom to produce, casting temperature is 1540 ℃, adopts induction stirring, continuous casting pulling rate 0.81m/min;
(3) heating: billet heating temperature is 1235 ℃, and soaking temperature is 1210 ℃, and soaking time is 5h;
(4) rolling: adopt recrystallization zone+non-recrystallization district two stage rolling technologies to be rolled, the fs, rolling start rolling temperature was 1000 ℃, and this stage single pass draught is 15%, and finishing temperature is 950 ℃, and the accumulative total draft is 45%; The rolling start rolling temperature of subordinate phase is 900 ℃, and finishing temperature is 850 ℃, and the accumulative total draft is 50%; Going into water temp after rolling is 760 ℃, and returning red temperature is 480 ℃, obtains the steel plate bullion.
The mechanical property of present embodiment steel plate: ys 525MPa, tensile strength 630MPa, unit elongation 39% ,-20 ℃ of average 260J of ballistic work, yield tensile ratio is average 0.80, tear resistance (DWTT) average 80%.Steel plate thickness of slab 1/4 place and 1/2 place metallographic structure photo are seen Fig. 1 (a) and Fig. 1 (b).
Embodiment 2
The big wall thickness subsea pipeline steel plate of present embodiment, thickness is 25mm, is made up of following components in weight percentage: C:0.06%, Si:0.20%; Mn:1.47%, P:0.010%, S:0.001%; Al:0.035%, Nb:0.043%, Ni:0.13%; Ti:0.015%, Mo:0.15%, surplus is Fe and unavoidable impurities.
The step of the working method of the big wall thickness subsea pipeline steel plate of present embodiment is following:
(1) smelts: will contain following weight percent C:0.06%, Si:0.20%, Mn:1.47%, P:0.010%; S:0.001%, Al:0.035%, Nb:0.043%, Ni:0.13%; Ti:0.015%, the molten steel of Mo:0.15% component is sent into the refining of LF refining furnace then earlier through electrosmelting; When liquid steel temperature meets or exceeds 1566 ℃, change the vacuum outgas of VD stove over to and handle, vacuum tightness is 66Pa; The vacuum hold-time is 20min, adds the CaSi piece before the vacuum-treat and discharges non-metallic inclusion, harmful element in the molten steel, guarantees the pure of molten steel;
(2) continuous casting: adopt 300mm thickness continuously cast bloom to produce, casting temperature is 1540 ℃, adopts induction stirring, continuous casting pulling rate 0.85m/min;
(3) heating: billet heating temperature is 1230 ℃, and soaking temperature is 1180 ℃, and soaking time is 5h;
(4) rolling: adopt recrystallization zone+non-recrystallization district two stage rolling technologies to be rolled, the fs, rolling start rolling temperature was 1050 ℃, and this stage single pass draught is 15%, and finishing temperature is 970 ℃, and the accumulative total draft is 45%; The rolling start rolling temperature of subordinate phase is 880 ℃, and finishing temperature is 850 ℃, and the accumulative total draft is 50%; Going into water temp after rolling is 770 ℃, and returning red temperature is 460 ℃, obtains the steel plate bullion.
The mechanical property of present embodiment steel plate: ys 520MPa, tensile strength 660MPa, unit elongation 39% ,-20 ℃ of average 299J of ballistic work, yield tensile ratio is average 0.79, tear resistance (DWTT) average 85%.Steel plate thickness of slab 1/4 place and 1/2 place metallographic structure photo are seen Fig. 2 (a) and Fig. 2 (b).
Embodiment 3
The big wall thickness subsea pipeline steel plate of present embodiment, thickness is 30.2mm, is made up of following components in weight percentage: C:0.06%, Si:0.21%; Mn:1.44%, P:0.009%, S:0.001%; Al:0.033%, Nb:0.047%, Ni:0.16%; Ti:0.016%, Mo:0.14%, surplus is Fe and unavoidable impurities.
The step of the working method of the big wall thickness subsea pipeline steel plate of present embodiment is following:
(1) smelts: will contain following weight percent C:0.06%, Si:0.21%, Mn:1.44%, P:0.009%; S:0.001%, Al:0.033%, Nb:0.047%, Ni:0.16%; Ti:0.016%, the molten steel of Mo:0.14% component is sent into the refining of LF refining furnace then earlier through electrosmelting; When liquid steel temperature meets or exceeds 1566 ℃, change the vacuum outgas of VD stove over to and handle, vacuum tightness is 66Pa; The vacuum hold-time is 23min, adds the CaSi piece before the vacuum-treat and discharges non-metallic inclusion, harmful element in the molten steel, guarantees the pure of molten steel;
(2) continuous casting: adopt 300mm thickness continuously cast bloom to produce, casting temperature is 1540 ℃, adopts induction stirring, continuous casting pulling rate 0.83m/min;
(3) heating: billet heating temperature is 1235 ℃, and soaking temperature is 1210 ℃, and soaking time is 5h;
(4) rolling: adopt recrystallization zone+non-recrystallization district two stage rolling technologies to be rolled, the fs, rolling start rolling temperature was 1030 ℃, and this stage single pass draught is 15%, and finishing temperature is 920 ℃, and the accumulative total draft is 45%; The rolling start rolling temperature of subordinate phase is 878 ℃, and finishing temperature is 855 ℃, and the accumulative total draft is 50%; Going into water temp after rolling is 760 ℃, and returning red temperature is 470 ℃, obtains the steel plate bullion.
The mechanical property of present embodiment steel plate: ys 510MPa, tensile strength 625MPa, unit elongation 40% ,-20 ℃ of average 300J of ballistic work, yield tensile ratio is average 0.82, tear resistance (DWTT) average 85%.Steel plate thickness of slab 1/4 place and 1/2 place metallographic structure photo are seen Fig. 3 (a) and Fig. 3 (b).
Claims (7)
1. one kind big wall thickness subsea pipeline steel plate is characterized in that this steel plate is made up of following components in weight percentage: C:0.05% ~ 0.07%, Si:0.15% ~ 0.25%; Mn:1.42% ~ 1.48%, P≤0.010%, S≤0.002%; Ni:0.13% ~ 0.18%, Nb:0.043% ~ 0.048%, Al:0.020% ~ 0.040%; Ti:0.014% ~ 0.024%, Mo:0.13% ~ 0.18%, surplus is Fe and unavoidable impurities.
2. big wall thickness subsea pipeline steel plate according to claim 1 is characterized in that the thickness of described steel plate is 25 ~ 30.2mm.
3. the working method of a big wall thickness subsea pipeline steel plate as claimed in claim 1 is characterized in that, comprises the steps:
(1) smelts: will contain following weight percent C:0.05% ~ 0.07%, Si:0.15% ~ 0.25%, Mn:1.42% ~ 1.48%; P≤0.010%, S≤0.002%, Ni:0.13% ~ 0.18%; Nb:0.043% ~ 0.048%, Al:0.020% ~ 0.040%, Ti:0.014% ~ 0.024%; The molten steel of Mo:0.13% ~ 0.18% component is sent into the refining of LF refining furnace then earlier through electrosmelting, when liquid steel temperature meets or exceeds 1560 ± 10 ℃, changes the vacuum outgas of VD stove over to and handles;
(2) continuous casting: adopt 300mm thickness continuously cast bloom to produce, adopt induction stirring, the continuous casting pulling rate is 0.81 ~ 0.85m/min;
(3) heating: billet heating temperature is the highest 1240 ℃, and 1210 ℃ of soaking temperatures, soaking time are 5h;
(4) rolling: adopt recrystallization zone+non-recrystallization district two stage rolling technologies to be rolled, the fs rolling temperature is 950 ~ 1100 ℃, and this stage single pass draught is 10 ~ 20%, and the accumulative total draft is 30 ~ 50%; The subordinate phase rolling temperature is 840 ~ 880 ℃, and the accumulative total draft is 30 ~ 50%; Going into water temp after rolling is 740 ~ 780 ℃, and returning red temperature is 450 ~ 500 ℃, obtains the steel plate bullion.
4. the working method of big wall thickness subsea pipeline steel plate according to claim 3; It is characterized in that feeding Al line adds the CaSi piece before vacuum outgas is handled during the described refining of step (1); Vacuum tightness≤66.6Pa that vacuum outgas is handled, vacuum hold-time>=20min.
5. the working method of big wall thickness subsea pipeline steel plate according to claim 3 is characterized in that, the described casting temperature of step (2) is 1535 ~ 1545 ℃.
6. the working method of big wall thickness subsea pipeline steel plate according to claim 3 is characterized in that, the described Heating temperature of step (3) is 1220 ~ 1240 ℃, and soaking temperature is 1180 ~ 1210 ℃.
7. the working method of big wall thickness subsea pipeline steel plate according to claim 3 is characterized in that, the described fs of step (4), rolling start rolling temperature was 930 ~ 1100 ℃, and finishing temperature is 920 ~ 970 ℃; The rolling start rolling temperature of subordinate phase is 840 ~ 910 ℃, and finishing temperature is 830 ~ 870 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210123639XA CN102676925A (en) | 2012-04-25 | 2012-04-25 | Submarine pipeline steel plate with great wall thickness and production method of submarine pipeline steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210123639XA CN102676925A (en) | 2012-04-25 | 2012-04-25 | Submarine pipeline steel plate with great wall thickness and production method of submarine pipeline steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102676925A true CN102676925A (en) | 2012-09-19 |
Family
ID=46809466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210123639XA Pending CN102676925A (en) | 2012-04-25 | 2012-04-25 | Submarine pipeline steel plate with great wall thickness and production method of submarine pipeline steel plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102676925A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088256A (en) * | 2013-01-08 | 2013-05-08 | 舞阳钢铁有限责任公司 | Anti-HIC pipeline steel plate and production method thereof |
| CN103266278A (en) * | 2013-05-07 | 2013-08-28 | 舞阳钢铁有限责任公司 | Quenching and tempering type pipe line steel plate and production method thereof |
| CN106319361A (en) * | 2015-06-16 | 2017-01-11 | 鞍钢股份有限公司 | Acidic corrosion-resistant X65 seamless steel pipeline and manufacturing method thereof |
| CN106319362A (en) * | 2015-06-16 | 2017-01-11 | 鞍钢股份有限公司 | X52 seamless pipeline steel pipe with sour corrosion resistance and manufacturing method of X52 seamless pipeline steel pipe |
| CN113088834A (en) * | 2021-02-26 | 2021-07-09 | 舞阳钢铁有限责任公司 | High-quality steel plate for offshore oil construction and production method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619416A (en) * | 2008-06-30 | 2010-01-06 | 鞍钢股份有限公司 | High-strength X100 pipe line steel hot rolling flat plate and method for manufacturing same |
| CN102400043A (en) * | 2011-11-10 | 2012-04-04 | 舞阳钢铁有限责任公司 | Large-thickness steel plate for oceaneering and production method thereof |
-
2012
- 2012-04-25 CN CN201210123639XA patent/CN102676925A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619416A (en) * | 2008-06-30 | 2010-01-06 | 鞍钢股份有限公司 | High-strength X100 pipe line steel hot rolling flat plate and method for manufacturing same |
| CN102400043A (en) * | 2011-11-10 | 2012-04-04 | 舞阳钢铁有限责任公司 | Large-thickness steel plate for oceaneering and production method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088256A (en) * | 2013-01-08 | 2013-05-08 | 舞阳钢铁有限责任公司 | Anti-HIC pipeline steel plate and production method thereof |
| CN103266278A (en) * | 2013-05-07 | 2013-08-28 | 舞阳钢铁有限责任公司 | Quenching and tempering type pipe line steel plate and production method thereof |
| CN103266278B (en) * | 2013-05-07 | 2015-06-17 | 舞阳钢铁有限责任公司 | Quenching and tempering type pipe line steel plate and production method thereof |
| CN106319361A (en) * | 2015-06-16 | 2017-01-11 | 鞍钢股份有限公司 | Acidic corrosion-resistant X65 seamless steel pipeline and manufacturing method thereof |
| CN106319362A (en) * | 2015-06-16 | 2017-01-11 | 鞍钢股份有限公司 | X52 seamless pipeline steel pipe with sour corrosion resistance and manufacturing method of X52 seamless pipeline steel pipe |
| CN113088834A (en) * | 2021-02-26 | 2021-07-09 | 舞阳钢铁有限责任公司 | High-quality steel plate for offshore oil construction and production method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103266278B (en) | Quenching and tempering type pipe line steel plate and production method thereof | |
| CN102409224B (en) | Hot rolled steel plate with excellent low-temperature toughness for thick submerged pipeline and production method of hot rolled steel plate | |
| CN103194687B (en) | Low-alloy high-strength cast steel for low temperature and preparation method thereof | |
| CN104357755A (en) | Large-thickness and high-strength steel plate applicable to low temperature and manufacturing method thereof | |
| CN104451409B (en) | Low cost HB400 grade wear-resisting steel and production method thereof | |
| CN104357742B (en) | 420MPa high-thickness hot-rolled steel sheet for ocean engineering and production method thereof | |
| CN102732782B (en) | Production method of steel plate for heavy-gauge pressure vessel | |
| JP2016511326A (en) | High corrosion resistance high strength Al-containing weathering steel sheet and method for producing the same | |
| CN102888560B (en) | Large-thickness quenched and tempered high-strength steel plate for ocean engineering and production method thereof | |
| CN108950432B (en) | Manufacturing method of high-strength and high-toughness low-alloy wear-resistant steel | |
| CN104928602A (en) | Pipeline steel, wide and thick plate, resistant to H2S corrosion, and production method thereof | |
| CN103397272B (en) | There is wear-resisting steel plate of low crack-sensitivity exponential sum high strength and preparation method thereof | |
| CN103468905B (en) | A kind of 485MPa level line steel hot rolling roll bending and manufacture method thereof | |
| CN101660100B (en) | Super-thick quenched and tempered steel plate with good obdurability matching, and manufacturing method thereof | |
| CN104131237A (en) | Economic type diphasic stainless steel with good toughness and weldability and manufacturing method thereof | |
| CN113913695B (en) | Corrosion-resistant and fatigue-resistant pipeline steel for underwater oil and gas production and production method thereof | |
| CN107988558A (en) | A kind of quenched deep-sea pipeline tablet of heavy wall and its production method | |
| CN102676925A (en) | Submarine pipeline steel plate with great wall thickness and production method of submarine pipeline steel plate | |
| WO2023165617A1 (en) | High-strength and high-toughness steel with long service life and wall thickness of ≥ 600 mm for valve body of subsea christmas tree, and heat treatment method and production method therefor | |
| CN107287506B (en) | A kind of 650MPa grades of medium temperature and medium pressure boiler plate and its production method | |
| CN102400062B (en) | X130 pipe line steel with low yield ratio and ultrahigh strength and manufacturing method of hot rolled flat plate of X130 pipe line steel | |
| CN111500928A (en) | Low-temperature high-toughness high-temperature high-strength and high-hardenability hot die steel and preparation technology thereof | |
| CN104878291B (en) | A kind of yield strength 350 MPa seamless line pipe and preparation method thereof | |
| CN104294161A (en) | High-temperature-resistant free-cutting high-strength steel | |
| CN103088256B (en) | Anti-HIC pipeline steel plate and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120919 |