CN109680204A - A kind of deep-sea acid-resistant pipeline steel and production method - Google Patents
A kind of deep-sea acid-resistant pipeline steel and production method Download PDFInfo
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- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- 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
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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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- 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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- 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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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/225—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by hot-rolling
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Abstract
The invention discloses a kind of deep-sea acid-resistant pipeline steels, it is related to metallurgical technology field, its chemical component and mass percent are as follows: C:0.020%~0.040%, Si:0.30%~0.40%, Mn:1.00%~1.20%, P≤0.010%, S≤0.0010%, Nb:0.030%~0.040%, Ti:0.010%~0.030%, Ni:0.20%~0.30%, Cr:0.10%~0.30%, Mo:0.10%~0.20%, Cu≤0.010%, V≤0.010%, Alt:0.015%~0.050%, Ceq:0.25%~0.38%, Pcm:0.10%~0.17%, surplus F E and impurity.The present invention reduces the adverse effect of banded structure, meets the antiacid corrosion resisting property of product.
Description
Technical field
The present invention relates to metallurgical technology fields, more particularly to a kind of deep-sea acid-resistant pipeline steel and production method.
Background technique
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: H occurs for hydrogen sulfide and metal2S+Fe → FeS+2H generates former
Sub- hydrogen, H2S is 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.It is (outer in tensile stress in the presence of having stress
It is adding or/and remaining) under effect, three Xiang Laying that hydrogen is provided in metallurgical imperfection (be mingled with, crystal boundary, phase boundary, dislocation, crackle etc.)
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.Therefore, atomic hydrogen should be prevented to enter the matrix of steel in product design.
Deep-sea military service needs to resist the influence of utilizing ocean current effect with pipe line steel, can resist all directions in deep-sea and bring
Pressure, therefore deep-sea pipeline steel using thickness generally in 20mm~40mm, it is corresponding based on bore 500mm~1200mm
Steel plate developing direction is based on thick narrow specification, and the deformation of think gauge product center portion during the rolling process is obviously insufficient, is easy to produce
Banded structure causes hydrogen atom to spread, and it is unqualified that HIC, SSC detection occurs in formation stress corrosion.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of deep-sea acid-resistant pipeline steel, chemical component and quality hundred
Divide ratio as follows: C:0.020%~0.040%, Si:0.30%~0.40%, Mn:1.00%~1.20%, P≤0.010%, S
≤ 0.0010%, Nb:0.030%~0.040%, Ti:0.010%~0.030%, Ni:0.20%~0.30%, Cr:
0.10%~0.30%, Mo:0.10%~0.20%, Cu≤0.010%, V≤0.010%, Alt:0.015%~0.050%,
Ceq:0.25%~0.38%, Pcm:0.10%~0.17%, surplus are Fe and impurity.
Technical effect: the present invention has carried out corresponding composition to the antiacid pipeline in the deep-sea of 20mm~40mm thickness specification and has set
Meter, suitable milling method have refined tissue grain size, have weakened the adverse effect of banded structure, meet the antiacid corrosion resistance of product
Energy.
The technical solution that the present invention further limits is:
A kind of preceding deep-sea acid-resistant pipeline steel, chemical component and mass percent are as follows: C:0.038%, Si:
0.37%, Mn:1.18%, P:0.006%, S:0.0006%, Nb:0.036%, Ti:0.021%, Ca:0.0019%, Ni:
0.29%, Cr:0.28%, Mo:0.18%, Cu≤0.010%, V≤0.010%, Alt:0.033%, Ceq:0.346%,
Pcm:0.143%, surplus are Fe and impurity.
A kind of preceding deep-sea acid-resistant pipeline steel, chemical component and mass percent are as follows: C:0.021%, Si:
0.31%, Mn:1.03%, P:0.009%, S:0.0007%, Nb:0.039%, Ti:0.012%, Ca:0.0021%, Ni:
0.21%, Cr:0.16%, Mo:0.13%, Cu≤0.010%, V≤0.010%, Alt:0.033%, Ceq:0.265%,
Pcm:0.11%, surplus are Fe and impurity.
Preceding a kind of deep-sea acid-resistant pipeline steel, with a thickness of 20mm~40mm.
Another object of the present invention is to provide a kind of deep-sea acid-resistant pipeline steel production method, using BOF → RH → LF →
CCM technique, continuous-cast blank thickness 320mm obtain composition and meet the requirements, C1.0 grades of macrostructure grading or the preferably company of low power
Slab is cast, rolling mill practice, 1100 DEG C~1120 DEG C of austenitic temperature, two open 820 DEG C~850 DEG C of temperature, and finishing temperature is 830 DEG C
~850 DEG C, entering coolant-temperature gage is 780 DEG C~800 DEG C, using it is ultrafast it is cold be cooled to 400 DEG C~500 DEG C, chill roll speed setting 0.4~
0.6m/s, 0.003~0.005m/s of acceleration2。
A kind of preceding deep-sea acid-resistant pipeline steel production method, low power grading are C0.5 grades by YB/T 4003；Roll work
Skill, 1105 DEG C of austenitic temperature, two open 821 DEG C of temperature, and finishing temperature is 833 DEG C, and entering coolant-temperature gage is 789 DEG C, using ultrafast cold
468 DEG C are cooled to, roller speed 0.5m/s, acceleration 0.003m/s2。
A kind of preceding deep-sea acid-resistant pipeline steel production method, low power grading are C0.5 grades by YB/T 4003-1997；
Rolling mill practice, 1108 DEG C of austenitic temperature, two open 848 DEG C of temperature, and finishing temperature is 849 DEG C, and entering coolant-temperature gage is 792 DEG C, use
It is ultrafast it is cold be cooled to 479 DEG C, roller speed 0.6m/s, acceleration 0.005m/s2。
The beneficial effects of the present invention are:
(1) present invention produces center segregation using the casting machine of slab thickness 320mm and is less than by the grading center segregation of YB/T 4003
C1.0 grades of slabs, slab quality is excellent, is conducive to the improvement of thick regulation product center portion quality, and reduction is rolled plate center portion sour gas and invaded
Erosion；
(2) it is designed in the present invention using low-phosphorous sulphur, low Carbon Manganese composition, addition chrome molybdenum improves the through hardening of the antiacid pipeline in deep-sea
Property, promote core structure fast transition, conducive to the reduction of cooling procedure banded structure；
(3) low-temperature flexibility that nickel increases the antiacid pipeline in deep-sea is added in the present invention, is increased during deep-sea is on active service and is resisted to not
The influence of equidirectional ocean current pressure improves deep-sea military service performance；
(4) present invention uses low temperature austenitizing technique, rolls rear Water Cooling Technology and improves, significantly improves tissue grain size, deep
Degree refinement core structure, effectively prevent sour gas to roll plate corrode, reach hic resistance SSC performance requirement；
(5) the narrow range restraint content of niobium of the present invention is conducive to thinning microstructure crystal grain while niobium precipitation being avoided to cause Antacid effectiveness
Adverse effect, to reach X60MS/MO grades, X65MS/MO grades of pipeline deep-seas are on active service antiacid corrosion resisting properties.
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 deep-sea acid-resistant pipeline steel provided in this embodiment, with a thickness of 38mm, chemical component and mass percent are as follows: C:
0.038%, Si:0.37%, Mn:1.18%, P:0.006%, S:0.0006%, Nb:0.036%, Ti:0.021%, Ca:
0.0019%, Ni:0.29%, Cr:0.28%, Mo:0.18%, Cu≤0.010%, V≤0.010%, Alt:0.033%,
Ceq:0.346%, Pcm:0.143%, surplus are Fe and impurity.
Above-mentioned deep-sea acid-resistant pipeline steel, using BOF → RH → LF → CCM technique, continuous-cast blank thickness 320mm, obtain at
Part meets the requirements, C1.0 grades of macrostructure grading or the preferably continuous-cast blank of low power, rolling mill practice, austenitic temperature 1105
DEG C, two open 821 DEG C of temperature, and finishing temperature is 833 DEG C, and entering coolant-temperature gage is 789 DEG C, using it is ultrafast it is cold be cooled to 468 DEG C, roller speed
0.5m/s, acceleration 0.003m/s2。
Embodiment 2
A kind of deep-sea acid-resistant pipeline steel provided in this embodiment, with a thickness of 21mm, chemical component and mass percent are as follows: C:
0.021%, Si:0.31%, Mn:1.03%, P:0.009%, S:0.0007%, Nb:0.039%, Ti:0.012%, Ca:
0.0021%, Ni:0.21%, Cr:0.16%, Mo:0.13%, Cu≤0.010%, V≤0.010%, Alt:0.033%,
Ceq:0.265%, Pcm:0.11%, surplus are Fe and impurity.
Above-mentioned deep-sea acid-resistant pipeline steel, using BOF → RH → LF → CCM technique, continuous-cast blank thickness 320mm, obtain at
Part meets the requirements, C1.0 grades of macrostructure grading or the preferably continuous-cast blank of low power, rolling mill practice, austenitic temperature 1108
DEG C, two open 848 DEG C of temperature, and finishing temperature is 849 DEG C, and entering coolant-temperature gage is 792 DEG C, using it is ultrafast it is cold be cooled to 479 DEG C, roller speed
0.6m/s, acceleration 0.005m/s2。
The steel plate that Fig. 1,2 obtain for embodiment 1, embodiment 2 typical organizational topography, Cong Tuzhong under metallographic microscope
It can see, organize the polygonal ferrite based on bainite, a small amount of, even tissue is tiny and fine and close, is conducive to antiacid resistance to
Corrosion energy.
1 HIC performance of table
| Embodiment | Soaking solution | CLR% | CTR% | CSR |
| Embodiment 1 | A | 0 | 0 | 0 |
| Embodiment 2 | A | 0 | 0 | 0 |
2 mechanical property of table
The deep-sea acid-resistant pipeline steel of the present embodiment is designed by unique composition, without any crackle, fully meets NACE 0177
Standard requirements, and Plate Production method simple practical, performance are stablized, and solve heavy wall (20m~40m) pipeline specially ground for a long time
The antiacid corrosion resisting property of steel, examination of materials performance are completely qualified.
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 (7)
1. a kind of deep-sea acid-resistant pipeline steel, which is characterized in that its chemical component and mass percent are as follows: C:0.020%~
0.040%, Si:0.30%~0.40%, Mn:1.00%~1.20%, P≤0.010%, S≤0.0010%, Nb:0.030%~
0.040%, Ti:0.010%~0.030%, Ni:0.20%~0.30%, Cr:0.10%~0.30%, Mo:0.10%~0.20%, Cu≤
0.010%, V≤0.010%, Alt:0.015%~0.050%, Ceq:0.25%~0.38%, Pcm:0.10%~0.17%, surplus are
Fe and impurity.
2. a kind of deep-sea acid-resistant pipeline steel according to claim 1, which is characterized in that its chemical component and mass percent
It is as follows: C:0.038%, Si:0.37%, Mn:1.18%, P:0.006%, S:0.0006%, Nb:0.036%, Ti:0.021%, Ca:
0.0019%, Ni:0.29%, Cr:0.28%, Mo:0.18%, Cu≤0.010%, V≤0.010%, Alt:0.033%, Ceq:
0.346%, Pcm:0.143%, surplus are Fe and impurity.
3. a kind of deep-sea acid-resistant pipeline steel according to claim 1, which is characterized in that its chemical component and mass percent
It is as follows: C:0.021%, Si:0.31%, Mn:1.03%, P:0.009%, S:0.0007%, Nb:0.039%, Ti:0.012%, Ca:
0.0021%, Ni:0.21%, Cr:0.16%, Mo:0.13%, Cu≤0.010%, V≤0.010%, Alt:0.033%, Ceq:
0.265%, Pcm:0.11%, surplus are Fe and impurity.
4. a kind of deep-sea acid-resistant pipeline steel according to claim 1, it is characterised in that: with a thickness of 20mm~40mm.
5. a kind of deep-sea acid-resistant pipeline steel production method, it is characterised in that: use BOF → RH → LF → CCM technique, continuous-cast blank
Thickness 320mm obtains composition and meets the requirements, C1.0 grades of macrostructure grading or the preferably continuous-cast blank of low power, rolling mill practice,
1100 DEG C~1120 DEG C of austenitic temperature, two open 820 DEG C~850 DEG C of temperature, and finishing temperature is 830 DEG C~850 DEG C, enters coolant-temperature gage
Be 780 DEG C~800 DEG C, using it is ultrafast it is cold be cooled to 400 DEG C~500 DEG C, chill roll speed sets 0.4~0.6m/s, acceleration
0.003~0.005m/s2。
6. a kind of deep-sea acid-resistant pipeline steel production method according to claim 4, it is characterised in that: YB/T is pressed in low power grading
4003-1997 is C0.5 grades；Rolling mill practice, 1105 DEG C of austenitic temperature, two open 821 DEG C of temperature, and finishing temperature is 833 DEG C, is entered
Coolant-temperature gage be 789 DEG C, using it is ultrafast it is cold be cooled to 468 DEG C, roller speed 0.5m/s, acceleration 0.003m/s2。
7. a kind of deep-sea acid-resistant pipeline steel production method according to claim 4, it is characterised in that: YB/T is pressed in low power grading
4003-1997 is C0.5 grades；Rolling mill practice, 1108 DEG C of austenitic temperature, two open 848 DEG C of temperature, and finishing temperature is 849 DEG C, is entered
Coolant-temperature gage be 792 DEG C, using it is ultrafast it is cold be cooled to 479 DEG C, roller speed 0.6m/s, acceleration 0.005m/s2。
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Cited By (3)
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| CN109811257A (en) * | 2019-01-21 | 2019-05-28 | 南京钢铁股份有限公司 | A kind of deep-sea acid-resistant pipeline steel and smelting process |
| CN116716544A (en) * | 2023-08-10 | 2023-09-08 | 江苏沙钢集团有限公司 | Round steel for ocean engineering and preparation method thereof |
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| CN109811258A (en) * | 2019-01-21 | 2019-05-28 | 南京钢铁股份有限公司 | A kind of deep-sea acid-resistant pipeline steel and milling method |
| CN109811257A (en) * | 2019-01-21 | 2019-05-28 | 南京钢铁股份有限公司 | A kind of deep-sea acid-resistant pipeline steel and smelting process |
| CN109811258B (en) * | 2019-01-21 | 2021-01-26 | 南京钢铁股份有限公司 | Deep-sea acid-resistant pipeline steel and rolling method |
| CN116716544A (en) * | 2023-08-10 | 2023-09-08 | 江苏沙钢集团有限公司 | Round steel for ocean engineering and preparation method thereof |
| CN116716544B (en) * | 2023-08-10 | 2023-10-10 | 江苏沙钢集团有限公司 | Round steel for ocean engineering and preparation method thereof |
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