CN108893678A - A kind of acid-resistant pipeline steel and milling method - Google Patents
A kind of acid-resistant pipeline steel and milling method Download PDFInfo
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- CN108893678A CN108893678A CN201810633846.7A CN201810633846A CN108893678A CN 108893678 A CN108893678 A CN 108893678A CN 201810633846 A CN201810633846 A CN 201810633846A CN 108893678 A CN108893678 A CN 108893678A
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- resistant pipeline
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
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- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of acid-resistant pipeline steel and milling methods, are related to field of metallurgy, and chemical component and mass percent are as follows：C：0.014%~0.024%, Si：0.10%~0.35%, Mn：0.60%~0.80%, P≤0.012%, S≤0.0010%, Nb：0.030%~0.070%, Ti：0.006%~0.020%, Ni：0.10%~0.30%, Cr：1.00%~1.10%, Mo：0.15%~0.20%, Cu：0.10%~0.30%, V：0.010%, Al：0.015%~0.050%, surplus is Fe and impurity.Present invention employs a kind of designs of distinct components, by low temperature austenitizing, TMCP controlled rolling and controlled cooling, roll rear rapid cooling technique, solve the antiacid anti-corrosion manufacture difficult point of Pipeline Steel Plate.
Description
Technical field
The present invention relates to field of metallurgy, more particularly to a kind of acid-resistant pipeline steel and milling method.
Background technique
Iran, Burma, India, Abu Dhabi, Russia, etc. national crude oil reserve it is huge, China is from this area's import
Crude oil quantity is increasing, and not only transportation cost is low and travelling speed is fast for pipeline, but crude oil exists by pipeline
Acid erosion, it is therefore, extremely urgent to the research and development of the antiacid pipeline of different size.
Antiacid anti-corrosion pipe line steel is mainly hic resistance, SSC performance, and hydrogen sulfide is a kind of faintly acid electrolyte, is 1~5 in pH
Aqueous solution in mainly exist in the form of molecular state, corrosion reaction occurs for hydrogen sulfide and metal：H2S+Fe → FeS+2H generates former
Sub- hydrogen, H2S are combined into the poisonous agent of hydrogen molecule as hydrogen, so that atomic hydrogen easily enters the matrix of steel.It is former into the hydrogen in steel
Son reaches fault location by diffusion, and is precipitated into hydrogen molecule, generates very high pressure.In the presence of having stress, in tensile stress（Outside
It is adding or/and remaining）Under effect, hydrogen is in metallurgical imperfection（It is mingled with, crystal boundary, phase boundary, dislocation, crackle etc.）Three drawings provided are answered
The enrichment of power area, when the hydrogen concentration of segregation reaches critical value, high strength steel, high internal stress component etc. will be in hydrogen and stress fields
It cracks under synergy.From reaction mechanism, sour corrosion is main happens is that electrochemical reaction, in the tissue, pearlite
The good conductor effect of electricity is primarily served, therefore how to ensure that structural transformation avoids the generation of pearlite in composition design process is weight
The ring wanted.
The existing Chinese patent literature about antiacid pipeline is such as：CN201210271608 discloses the antiacid pipeline of normalizing state
With steel X52NS hot-rolled sheet coil and its manufacturing method；CN201410240436 discloses a kind of compound acid-resistant pipeline steel base-material heat
Offset plate and production method；CN201410338917 discloses the manufacture of no cupro-nickel acid-resistant pipeline steel X52MS and its hot-rolled sheet coil
Method；CN201710457719 discloses the high-strength acid-resistant pipeline steel hot-rolled coil of low yield strength ratio thin gauge and its manufacturing method.This
Application is designed to provide a kind of new ingredient design, and obtained product is under the premise of meeting antiacid requirement, with existing production
Condition ratio has superior performance.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of acid-resistant pipeline steel, chemical component and mass percent
It is as follows：C：0.014%~0.024%, Si：0.10%~0.35%, Mn：0.60%~0.80%, P≤0.012%, S≤0.0010%,
Nb：0.030%~0.070%, Ti：0.006%~0.020%, Ni：0.10%~0.30%, Cr：1.00%~1.10%, Mo：0.15%
~0.20%, Cu：0.10%~0.30%, V：0.010%, Al：0.015%~0.050%, surplus is Fe and impurity.
Technical effect：From reaction mechanism, sour corrosion is main happens is that electrochemical reaction, in the tissue, pearly-lustre
Body primarily serves the good conductor effect of electricity, and the present invention ensures that structural transformation avoids the production of pearlite in composition design process
It is raw, using this unique design, by TMCP rolling mill practice, roll rear rapid cooling technique, successfully obtain acicular ferrite, few
Measure the tissue of polygonal ferrite, and fine microstructures are fine and close, realize the antiacid corrosion resisting property requirement of product, greatly improved through
Ji benefit.
The technical solution that the present invention further limits is：
A kind of preceding acid-resistant pipeline steel, chemical component and mass percent are as follows：C：0.021%, Si：0.13%, Mn：
0.68%, P：0.010%, S：0.009%, Nb：0.036%, Ti：0.015%, Ni：0.13%, Cr：1.05%, Mo：0.18%, Cu：
0.13%, V：0.002%, Al：0.030%, surplus is Fe and impurity.
A kind of preceding acid-resistant pipeline steel, chemical component and mass percent are as follows：C：0.019%, Si：0.23%,
Mn：0.78%, P：0.011%, S：0.006%, Nb：0.066%, Ti：0.015%, Ni：0.23%, Cr：1.08%, Mo：0.16%, Cu：
0.23%, V：0.002%, Al：0.036%, surplus is Fe and impurity.
Another object of the present invention is to provide a kind of milling method of acid-resistant pipeline steel, in the operation of rolling, breaking down temperature
It is set as 1110 degree, the breaking down stage is averaged 60000~70000KN of roll-force, average drafts 30mm, breaking down stage extreme trace time pressure
Lower rate is greater than 22%；Finish rolling start rolling temperature sets 880 DEG C~890 DEG C, 875 DEG C~885 DEG C of finishing temperature；Enter coolant-temperature gage setting 830
DEG C~850 DEG C, steel plate goes out 350 DEG C~400 DEG C of cooling system temperature after rolling.
The beneficial effects of the invention are as follows：
（1）The present invention mainly passes through austenitic temperature technique, rolling mill practice, cooling technique and realizes that austenitization is with adding
The raising of hot temperature, original austenite grains can gradually grow up, therefore, can effective degradation group by low temperature Ovshinsky body technology
Knit grain size；
（2）The breaking down stage cooperates big roll-force in the present invention, it is ensured that sufficient dynamic recrystallization occurs in the operation of rolling；
（3）The finish rolling stage uses zerolling in the present invention, is conducive to that Static Recrystallization occurs；
（4）The present invention is heated by austenite, TMCP is rolled, ultrafast cold technique, has reached even tissue, refinement, banded structure
The effect being mitigated or eliminated, dense internal organization have prevented hydrogen and have spread inside steel plate, and it is corrosion-resistant to meet steel plate resistant to hydrogen
Performance requirement.
Detailed description of the invention
Fig. 1 is the obtained steel plate of embodiment 1 typical organizational topography under metallographic microscope；
Fig. 2 is the obtained steel plate of embodiment 2 typical organizational topography under metallographic microscope.
Specific embodiment
Embodiment 1
A kind of acid-resistant pipeline steel provided in this embodiment, chemical component are as follows：C：0.021%, Si：0.13%, Mn：0.68%, P：
0.010%, S：0.009%, Nb：0.036%, Ti：0.015%, Ni：0.13%, Cr：1.05%, Mo：0.18%, Cu：0.13%, V：
0.002%, Al：0.030%, surplus is Fe and impurity.
The production method of above-mentioned acid-resistant pipeline steel is as follows：
S1, austenitizing temperature are 1155 DEG C, effectively refine original structure grain size；
S2, breaking down temperature set 1110 DEG C, and the control of breaking down roll-force is in 60000~70000KN, average drafts 30mm, it is ensured that
Sufficient dynamic recrystallization occurs in the operation of rolling, breaking down stage final reduction rate is greater than 22%；The setting of finish rolling start rolling temperature
880 DEG C~890 DEG C, 875 DEG C~885 DEG C of finishing temperature, zerolling is conducive to that Static Recrystallization occurs, and passes through rolling mill practice
Improve, the more uniform densification of obtained tissue, while needle-shaped iron cellulose content is more；
S3, enter 830 DEG C~850 DEG C of coolant-temperature gage setting, cooled down after rolling by ultrafast, steel plate goes out cooling system temperature
350 DEG C~400 DEG C of degree；
Steel plate after S4, rolling is sheared after being cooled down by cold bed, head-stamp is put in storage.
Embodiment 2
A kind of acid-resistant pipeline steel provided in this embodiment, the difference from embodiment 1 is that, chemical component is as follows：C：0.019%,
Si：0.23%, Mn：0.78%, P：0.011%, S：0.006%, Nb：0.066%, Ti：0.015%, Ni：0.23%, Cr：1.08%, Mo：
0.16%, Cu：0.23%, V：0.002%, Al：0.036%, surplus is Fe and impurity.
The HIC performance detection experiment for the acid-resistant pipeline steel that embodiment 1, embodiment 2 produce is tested according to NACE TM0248-A
Solution standard carries out,（CTR）≤ 5%,（CSR）≤ 2%,（CLR）≤15%；SSC performance is curved by 4 points of ASTM G39 standard progress
Song test carries out 4 bend tests in the solution A of NACE TM0177, and test period 720 hours, sample loading stress was
The 80% of practical yield strength.It is observed under 10 times of enlargement ratios after test, test specimen thickness of sample direction flawless.
The prior art antiacid pipeline product tissue produced is mainly based on polygonal ferrite, while there is also a small amount of
Bainite and pearlite, therefore these products have that Antacid effectiveness is unstable, and especially think gauge product often goes out
The existing underproof phenomenon of Antacid effectiveness.Acid-resistant pipeline steel of the invention is rolled by low temperature austenitizing, TMCP, rolls rear rapid cooling work
Skill, obtained stocking product tissue is mainly based on bainite, and there are also a small amount of polygonal ferrites, and crystal grain is thinner, and tissue is more
Add fine and close and stablizes；Meanwhile high-chromium alloy will form passivating film between crystal boundary, effectively sour corrosion be prevented to react, so that at
Part antiacid corrosion resistance of product is more excellent.It can in conclusion the Antacid effectiveness of antiacid pipeline product prepared by the present invention is more stable
It leans on, meets products of different specifications HIC, SSC performance requirement.
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (4)
1. a kind of acid-resistant pipeline steel, which is characterized in that its chemical component and mass percent are as follows：C：0.014%~0.024%,
Si：0.10%~0.35%, Mn：0.60%~0.80%, P≤0.012%, S≤0.0010%, Nb：0.030%~0.070%, Ti：
0.006%~0.020%, Ni：0.10%~0.30%, Cr：1.00%~1.10%, Mo：0.15%~0.20%, Cu：0.10%~
0.30%, V：0.010%, Al：0.015%~0.050%, surplus is Fe and impurity.
2. a kind of acid-resistant pipeline steel according to claim 1, which is characterized in that its chemical component and mass percent are such as
Under：C：0.021%, Si：0.13%, Mn：0.68%, P：0.010%, S：0.009%, Nb：0.036%, Ti：0.015%, Ni：0.13%,
Cr：1.05%, Mo：0.18%, Cu：0.13%, V：0.002%, Al：0.030%, surplus is Fe and impurity.
3. a kind of acid-resistant pipeline steel according to claim 1, which is characterized in that its chemical component and mass percent are such as
Under：C：0.019%, Si：0.23%, Mn：0.78%, P：0.011%, S：0.006%, Nb：0.066%, Ti：0.015%, Ni：0.23%,
Cr：1.08%, Mo：0.16%, Cu：0.23%, V：0.002%, Al：0.036%, surplus is Fe and impurity.
4. a kind of milling method applied to acid-resistant pipeline steel as described in claim 1, it is characterised in that：In the operation of rolling,
Breaking down temperature is set as 1110 degree, and the breaking down stage is averaged 60000~70000KN of roll-force, average drafts 30mm, the breaking down stage
Final reduction rate is greater than 22%；Finish rolling start rolling temperature sets 880 DEG C~890 DEG C, 875 DEG C~885 DEG C of finishing temperature；Enter water temperature
830 DEG C~850 DEG C of degree setting, steel plate goes out 350 DEG C~400 DEG C of cooling system temperature after rolling.
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| CN201810633846.7A CN108893678A (en) | 2018-06-20 | 2018-06-20 | A kind of acid-resistant pipeline steel and milling method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108546884A (en) * | 2018-06-20 | 2018-09-18 | 南京钢铁股份有限公司 | A kind of acid-resistant pipeline steel and pipe-making method |
| CN108893677A (en) * | 2018-06-20 | 2018-11-27 | 南京钢铁股份有限公司 | A kind of acid-resistant pipeline steel and production method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105088101A (en) * | 2015-07-17 | 2015-11-25 | 武汉钢铁(集团)公司 | Steel for enamel heat transfer element having corrosion resistance and manufacturing method thereof |
| CN105132807A (en) * | 2015-10-10 | 2015-12-09 | 武汉钢铁(集团)公司 | Pipeline steel excellent in acid corrosion resistance on seabed and production method |
-
2018
- 2018-06-20 CN CN201810633846.7A patent/CN108893678A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105088101A (en) * | 2015-07-17 | 2015-11-25 | 武汉钢铁(集团)公司 | Steel for enamel heat transfer element having corrosion resistance and manufacturing method thereof |
| CN105132807A (en) * | 2015-10-10 | 2015-12-09 | 武汉钢铁(集团)公司 | Pipeline steel excellent in acid corrosion resistance on seabed and production method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108546884A (en) * | 2018-06-20 | 2018-09-18 | 南京钢铁股份有限公司 | A kind of acid-resistant pipeline steel and pipe-making method |
| CN108893677A (en) * | 2018-06-20 | 2018-11-27 | 南京钢铁股份有限公司 | A kind of acid-resistant pipeline steel and production method |
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Application publication date: 20181127 |