CN105861799B - Think gauge pipe line steel containing vanadium and its production method - Google Patents
Think gauge pipe line steel containing vanadium and its production method Download PDFInfo
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- CN105861799B CN105861799B CN201610380000.8A CN201610380000A CN105861799B CN 105861799 B CN105861799 B CN 105861799B CN 201610380000 A CN201610380000 A CN 201610380000A CN 105861799 B CN105861799 B CN 105861799B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- 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
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention relates to think gauge pipe line steel containing vanadium and its production method, belong to technical field of pipeline steel.Present invention solves the technical problem that it is to provide a kind of production method of inexpensive, welding heat affected zone function admirable think gauge pipe line steel containing vanadium.This method controls within the specific limits by usual desulfurizing iron, converter smelting, by molten steel composition, rolled again through being casting continuously to form slab, by strict controlled rolling parameter and the chemical composition of molten steel, the think gauge pipe line steel containing vanadium that thickness is 12.5~22.0mm is obtained.Present invention eliminates the Nb alloying elements of costliness, produced using V microalloying modes, reach the purpose for improving intensity by precipitation strength, the pipe line steel yield tensile ratio of production is low, due to V secondary precipitation in welding process, welding heat affected zone function admirable, have the characteristics that low cost, rolling mill practice control simple and strong adaptability.
Description
Technical field
The present invention relates to think gauge pipe line steel containing vanadium and its production method, belong to technical field of pipeline steel.
Background technology
Pipeline steel is mainly used in the conveying of the flowing materials such as crude oil, product oil, natural gas and water-coal-slurry.International average energy
In the consumption structure of source, natural gas accounts for the 23% of total energy consumption figure, and the current natural gas consumption in China only accounts for total energy
2.1%；In 5 kinds of railway, highway, aviation, water transport and pipeline means of transportation, pipeline transportation is a kind of economy, continuous safe
Means of transportation.The U.S. accounts for 16% of total gross traffic or so using pipeline logistics, and China only accounts for 3~4%, leads in the world
The material of piping transport accounts for the 20% of transport total amount, and China is less than 2%.At present, global Oil Gas pipeline overall length is more than 260
Ten thousand kilometers, only Russia just has 210,000 kilometers, and China's trunk line only has about 8.2 ten thousand kilometers.
Oil, natural gas transmission pipeline are divided into long-distance transport pipes and infield gathering line two parts.Long-distance transport pipes are
Raising transfer efficiency, backbone discharge pressure are higher, it is desirable to from the other steel grade of higher intensity level, such as X70, X80 rank；Collection
Defeated pipeline, branch line and the less pipeline delivery pressure of some throughput rates are relatively low, the general steel grade relatively low from intensity, as X42, X46,
X52 ranks.
At present, domestic L360/X52 levels pipe line steel is typically produced using Nb, Ti microalloying mode.Such as patent
CN101928884A discloses a kind of production method of X52 pipe line steels, and chemical composition is in the pipe line steel：C：0.07~
0.09%th, Si：0.15~0.30%, Mn：1.10~1.30%, Nb：0.020~.040%, Ti：0.010~0.020%,
Als：0.010~0.040%.Sha Gang groups production X52 chemical compositions be：C：0.08~0.10%, Si：0.22~
0.33%, Mn：1.21~1.33%, Nb：0.037~0.055%, Ti：0.014~0.018%.The L360 chemistry of wine steel production
Composition is：C：0.08~0.12%, Si：0.10~0.25%, Mn：1.10~1.30%, Nb：0.03~0.05%.
It can be seen that the L360/X52 levels pipe line steel of domestic production with the addition of microalloy element Nb substantially.The most important effects of Nb
It is the recrystallization for preventing deformed austeaite, obtains the very high flat austenite crystal of the deformation energy storage extremely elongated, also simultaneously
Ferrite crystal grain can be prevented to grow up, obtain more tiny ferrite crystal grain.However, alloy element Nb is expensive, add
The production cost of enterprise.With raising of the enterprise to energy-saving requirement, seek not add Nb in pipe line steel, can but obtain
The X52 pipe line steels of equal performance.
The present inventor is devoted for years to the research in pipe line steel, its patent CN103572025A disclose it is a kind of it is low into
The production method of this X52 pipe line steels, the chemical component weight percentage of the X52 pipe line steels are：C：0.08~0.12wt%,
Si：≤ 0.35wt%, Mn：1.10~1.40wt%, P：≤ 0.025wt%, S：≤ 0.025wt%, Ti：0.010~
0.020wt%, remaining is Fe and inevitable impurity.Using the steel of the composition, coordinate corresponding rolling process, pipe can be reduced
The cost of line steel, still, the pipe line steel are influenceed, the performance of welding heat affected zone is bad, needs in welding by welding process
It is further to improve.
Welding heat affected zone is in the presence of Thermal Cycle, and the mother metal that weld seam both sides are in solid-state occurs obvious group
Knit the region with performance change.Different from weld seam, weld seam can be by the adjustment of the chemical composition of welding rod, then coordinates appropriate weldering
Technique is connect to ensure the requirement of performance, and heat affected area chemical composition is identical with mother metal, be under thermal cycle effect caused by
Tissue distribution non-uniformity problem.
Patent CN105063494A discloses a kind of production method of think gauge X60 pipe line steels, comprises the following steps：Slab
Roughing is carried out after being heated to 1185~1220 DEG C of soaking；Finish rolling is carried out again, and entry temperature at finishing is 960~1000 DEG C, finish to gauge temperature
Spend and be, 830~870 DEG C, 15~40 DEG C/s cooling velocity be cooled to it is higher than coiling temperature 10~30 DEG C, after 4~6s of air cooling again
It is cooled to batch within the temperature range of 560~630 DEG C with 5~15 DEG C/s cooling velocity and produces.This method be applied to it is specific into
The production of the pipe line steel for the X60 ranks divided, for the steel of other chemical compositions and grade, particularly X52 pipe line steels, using the party
If method produces, its mechanical property is poor.
The content of the invention
Contain present invention solves the technical problem that being to provide a kind of inexpensive, welding heat affected zone function admirable think gauge
The production method of vanadium pipe line steel.
The production method of think gauge pipe line steel containing vanadium of the present invention, comprises the following steps：Slab is in 1210~1240 DEG C of soaking
Afterwards, roughing is carried out using 3~7 passages；Finish rolling is carried out through 4~7 frames again, finishing temperature is 830~870 DEG C, 10~30 DEG C/s
Cooling velocity be cooled to 700~760 DEG C, be cooled to 660~680 again with 30~60 DEG C/s cooling velocity after 1~5s of air cooling
DEG C it is cooled within the temperature range of 580~620 DEG C and is batched with 5~15 DEG C/s again, produces think gauge pipe line steel containing vanadium wherein, it is described
The chemical composition of pipe line steel is made up of the component of following mass percent：C：0.07~0.12%, Si：≤ 0.35%, Mn：0.90
~1.30%, P：≤ 0.025%, S：≤ 0.025%, V：0.05~0.10%, surplus is Fe and inevitable impurity element.
Preferably, the thickness of slab is 200mm~230mm, and the workpiece thickness after roughing is 40~60mm, and think gauge contains
The thickness of vanadium pipe line steel finished product is 12.5~22.0mm.
Think gauge pipe line steel containing vanadium of the present invention, preferably its chemical composition are made up of the component of following mass percent：C：
0.07~0.11%, Si：0.05~0.26%, Mn：0.97~1.22%, P：0.009~0.011%, S：0.004~
0.007%, V：0.06~0.10%, surplus is Fe and inevitable impurity element.
The present invention also provides the think gauge pipe line steel containing vanadium that the inventive method is prepared.
Think gauge pipe line steel containing vanadium of the present invention, its finished product are organized as ferrite+pearlite, and mechanical property is：Yield strength
Rel >=360MPa, tensile strength Rm >=460MPa, elongation percentage A >=20.0%, -20 DEG C of ballistic work >=60J, meet L360/
The regulation of X52 level pipe line steels.
Compared with prior art, present invention eliminates the Nb alloying elements of costliness, given birth to using V microalloying modes
Production, the purpose for improving intensity is reached by precipitation strength, the pipe line steel yield tensile ratio of production is low, secondary due to V in welding process
Separate out, welding heat affected zone function admirable, have the characteristics that low cost, rolling mill practice control simple and strong adaptability.
Embodiment
The production method of think gauge pipe line steel containing vanadium of the present invention, comprises the following steps：Slab is in 1210~1240 DEG C of soaking
Afterwards, roughing is carried out using 3~7 passages；Finish rolling is carried out through 4~7 frames again, finishing temperature is 830~870 DEG C, 10~30 DEG C/s
Cooling velocity be cooled to 700~760 DEG C, be cooled to 660~680 again with 30~60 DEG C/s cooling velocity after 1~5s of air cooling
DEG C it is cooled within the temperature range of 580~620 DEG C and is batched with 5~15 DEG C/s again, produces think gauge pipe line steel containing vanadium wherein, it is described
The chemical composition of pipe line steel is made up of the component of following mass percent：C：0.07~0.12%, Si：≤ 0.35%, Mn：0.90
~1.30%, P：≤ 0.025%, S：≤ 0.025%, V：0.05~0.10%, surplus is Fe and inevitable impurity element.
The present invention can be controlled within the above range, through being casting continuously to form by usual desulfurizing iron, converter smelting, by molten steel composition
Slab rolls obtained again.
Wherein, C is the effective element for the intensity for increasing steel, but its toughness, plasticity and weldability to steel has negative shadow
Ring.Therefore C mass percent is 0.07~0.12% in the present invention, to ensure while the intensity of steel is increased, not drop
Low its toughness, plasticity and weldability.
Mn can improve hardness of steel and wearability, moreover it is possible to refine pearlitic structrure, improve its plasticity.But the too high meeting of manganese content
Cause obvious segregation and tissue deterioration, influence toughness properties.Therefore in the present invention Mn mass percent for 0.9~
1.30%.
V Grain refinement is strong, can improve the intensity and toughness of steel, reduces superheated susceptivity, improves heat endurance, and
Due to V secondary precipitation in welding process, the performance of welding heat affected zone can be improved.In order to ensure the weldering of pipe line steel of the present invention
Connect the performance of the zone of influence, V mass percent is 0.05~0.10% in the present invention.
Further, preferably the thickness of slab is 200mm~230mm, and the workpiece thickness after roughing is 40~60mm, thick
The thickness of specification pipe line steel containing vanadium finished product is 12.5~22.0mm.
Think gauge pipe line steel containing vanadium of the present invention, preferably its chemical composition are made up of the component of following mass percent：C：
0.07~0.11%, Si：0.05~0.26%, Mn：0.97~1.22%, P：0.009~0.011%, S：0.004~
0.007%, V：0.06~0.10%, surplus is Fe and inevitable impurity element.
The present invention also provides the think gauge pipe line steel containing vanadium that the inventive method is prepared.
Think gauge pipe line steel containing vanadium of the present invention, its finished product are organized as ferrite+pearlite, and mechanical property is：Rel≥
360MPa, Rm >=460MPa, A >=20.0%, -20 DEG C of ballistic work >=60J, meet the regulations of L360/X52 level pipe line steels.
The embodiment of the present invention is further described with reference to embodiment, therefore not limited the present invention
System is among described scope of embodiments.
Embodiment 1
The chemical component weight percentage of L360/X52 pipe line steels is C：0.11%, Si：0.17%, Mn：1.22%, P：
0.015%, S：0.004%, V：0.08%, surplus is Fe and inevitable impurity element forms；With conventional continuous cast method by its
It is cast into the thick continuous casting steel billets of 230mm；1240 DEG C of progress roughing are heated to, intermediate slab thickness is thick in 58mm, finished product after roughing
Spend for 20.0mm；Finishing temperature is 870 DEG C；Be cooled to 750 DEG C after finish rolling with 17 DEG C/s cooling rate, after air cooling 2s, then with 30 DEG C/
S cooling rate, which is cooled to 680 DEG C and is cooled to 600 DEG C again with 5 DEG C/s cooling rate, batches；Obtain pipe line steel finished product.
After testing, pipe line steel end properties is shown in Table 2.
Welded using submerged arc soldering method, the performance of its welding heat affected zone is shown in Table 3.
Embodiment 2
The chemical component weight percentage of L360/X52 pipe line steels is C：0.07%, Si：0.26%, Mn：1.08%, P：
0.009%, S：0.007%, V：0.06%, surplus is Fe and inevitable impurity element forms；With conventional continuous cast method by its
It is cast into the thick continuous casting steel billets of 200mm；1210 DEG C of progress roughing are heated to, intermediate slab thickness is thick in 48mm, finished product after roughing
Spend for 13.8mm；Finishing temperature is 850 DEG C；Be cooled to 720 DEG C after finish rolling with 25 DEG C/s cooling rate, after air cooling 1s, then with 50 DEG C/
S cooling rate, which is cooled to 660 DEG C and is cooled to 580 DEG C again with 15 DEG C/s cooling rate, batches；Obtain pipe line steel finished product.
After testing, pipe line steel end properties is shown in Table 2.
Welded using submerged arc soldering method, the performance of its welding heat affected zone is shown in Table 3.
Embodiment 3
The chemical component weight percentage of L360/X52 pipe line steels is C：0.09%, Si：0.05%, Mn：0.97%, P：
0.011%, S：0.006%, V：0.10%, surplus is Fe and inevitable impurity element forms；With conventional continuous cast method by its
It is cast into the thick continuous casting steel billets of 230mm；1220 DEG C of progress roughing are heated to, intermediate slab thickness is thick in 53mm, finished product after roughing
Spend for 17.0mm；Finishing temperature is 830 DEG C；Be cooled to 700 DEG C after finish rolling with 21 DEG C/s cooling rate, after air cooling 4s, then with 40 DEG C/
S cooling rate, which is cooled to 660 DEG C and is cooled to 620 DEG C again with 8 DEG C/s cooling rate, batches；Obtain pipe line steel finished product.
After testing, pipe line steel end properties is shown in Table 2.
Welded using submerged arc soldering method, the performance of its welding heat affected zone is shown in Table 3.
Comparative example 1
The chemical component weight percentage of L360/X52 pipe line steels is C：0.09%, Si：0.05%, Mn：0.97%, P：
0.011%, S：0.006%, V：0.10%, surplus is Fe and inevitable impurity element forms；With conventional continuous cast method by its
It is cast into the thick continuous casting steel billets of 230mm；1220 DEG C of progress roughing are heated to, intermediate slab thickness is thick in 53mm, finished product after roughing
Spend for 17.0mm；Finishing temperature is 830 DEG C；Be cooled to 660 DEG C after finish rolling with 21 DEG C/s cooling rate, after air cooling 6s, then with 15 DEG C/
S cooling rate is cooled to 630 DEG C and batched；Obtain pipe line steel finished product.
After testing, pipe line steel end properties is shown in Table 2.
Welded using submerged arc soldering method, the performance of its welding heat affected zone is shown in Table 3.
Comparative example 2
The chemical component weight percentage of L360/X52 pipe line steels is C：0.09%, Si：0.05%, Mn：0.97%, P：
0.011%, S：0.006%, Ti：0.015%, surplus is Fe and inevitable impurity element forms；Will with conventional continuous cast method
It is cast into the thick continuous casting steel billets of 230mm；1220 DEG C of progress roughing are heated to, intermediate slab thickness is in 53mm, finished product after roughing
Thickness is 17.0mm；Finishing temperature is 800 DEG C；700 DEG C are cooled to 21 DEG C/s cooling rate, after finish rolling after air cooling 6s, then with 15
DEG C/s cooling rate is cooled to 630 DEG C and batches；Obtain pipe line steel finished product.
After testing, pipe line steel end properties is shown in Table 2.
Welded using submerged arc soldering method, the performance of its welding heat affected zone is shown in Table 3.
The pipeline steel chemical composition of table 1
The performance of the pipe line steel of table 2
The performance of the welding heat affected zone of table 3
By above-described embodiment and comparative example, using method disclosed in CN105063494A, can not be prepared into
To the L360/X52 of present invention pipe line steel, and compared with the existing method for using addition Ti microalloyings, the inventive method
Produced using V microalloying modes, due to V secondary precipitation in welding process, raising intensity is reached by precipitation strength
Purpose, its welding heat affected zone is functional.In addition, present invention eliminates the Nb alloying elements of costliness, there is low cost, roll
Technology controlling and process processed is simple and the features such as strong adaptability.
Claims (5)
1. the production method of think gauge pipe line steel containing vanadium, it is characterised in that comprise the following steps：Slab is equal at 1210~1240 DEG C
After heat, roughing is carried out using 3~7 passages；Again through 4~7 frames carry out finish rolling, finishing temperature be 830~870 DEG C, 10~30 DEG C/
S cooling velocity is cooled to 700~760 DEG C, and 660~680 are cooled to again with 30~60 DEG C/s cooling velocity after 1~5s of air cooling
DEG C it is cooled within the temperature range of 580~620 DEG C and is batched with 5~15 DEG C/s again, produces think gauge pipe line steel containing vanadium, wherein, institute
The chemical composition for stating pipe line steel is made up of the component of following mass percent：C：0.07~0.12%, Si：≤ 0.35%, Mn：
0.90~1.30%, P：≤ 0.025%, S：≤ 0.025%, V：0.05~0.10%, surplus is Fe and inevitable impurity member
Element.
2. the production method of think gauge pipe line steel containing vanadium according to claim 1, it is characterised in that：The thickness of slab is
200mm~230mm, the workpiece thickness after roughing are 40~60mm, the thickness of think gauge pipe line steel containing vanadium finished product for 12.5~
22.0mm。
3. the production method of think gauge pipe line steel containing vanadium according to claim 1 or 2, it is characterised in that its chemical composition
It is made up of the component of following mass percent：C：0.07~0.11%, Si：0.05~0.26%, Mn：0.97~1.22%, P：
0.009~0.011%, S：0.004~0.007%, V：0.06~0.10%, surplus is Fe and inevitable impurity element.
4. the think gauge pipeline containing vanadium of the production method production of think gauge pipe line steel containing vanadium described in any one of claims 1 to 3
Steel.
5. think gauge pipe line steel containing vanadium according to claim 4, it is characterised in that：Finished product is organized as ferrite+pearlite,
Mechanical property is：Yield strength Rel >=360MPa, tensile strength Rm >=460MPa, elongation percentage A >=20.0%, -20 DEG C of impact
Work(>=60J.
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS558454A (en) * | 1978-07-03 | 1980-01-22 | Nippon Steel Corp | Manufacture of v-type high toughness high tension steel of good weldability |
| JPS58136717A (en) * | 1982-02-05 | 1983-08-13 | Sumitomo Metal Ind Ltd | Manufacture of high tensile hot rolled steel strip containing vanadium |
| CN101376946B (en) * | 2007-08-28 | 2011-07-20 | 宝山钢铁股份有限公司 | Manufacturing method of straight welding petroleum casing pipe of steel for 110ksi steel grade |
| CN101608282B (en) * | 2009-07-03 | 2011-03-09 | 天津钢管集团股份有限公司 | Drill rod material steel pipe resisting low temperature of -40 to -60 DEG C and manufacturing method thereof |
| CN102409148A (en) * | 2010-09-26 | 2012-04-11 | 鞍钢股份有限公司 | Controlled cooling method for L450MB pipeline steel |
| CN103627869B (en) * | 2013-12-06 | 2016-03-02 | 攀钢集团西昌钢钒有限公司 | A kind of cooling control after rolling technique of low-yield ratio pipeline steel and preparation method |
| CN104109744B (en) * | 2014-07-28 | 2016-11-09 | 攀钢集团西昌钢钒有限公司 | The method improving pipeline steel block hammer performance |
| CN104513928A (en) * | 2014-12-25 | 2015-04-15 | 河北钢铁股份有限公司承德分公司 | Broad hot strip steel production method for vanadium-containing middle-level petroleum and natural gas conveying tube |
| CN105063494B (en) * | 2015-08-27 | 2017-10-27 | 攀钢集团西昌钢钒有限公司 | Think gauge X60 pipe line steels and its production method |
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