CN110157982A - A kind of Seawater corrosion-resistant steel plate and its production method - Google Patents
A kind of Seawater corrosion-resistant steel plate and its production method Download PDFInfo
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- CN110157982A CN110157982A CN201910411802.4A CN201910411802A CN110157982A CN 110157982 A CN110157982 A CN 110157982A CN 201910411802 A CN201910411802 A CN 201910411802A CN 110157982 A CN110157982 A CN 110157982A
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- steel plate
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- rolling
- seawater corrosion
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000013535 sea water Substances 0.000 title claims abstract description 22
- 239000010935 stainless steel Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 65
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 57
- 239000010959 steel Substances 0.000 claims abstract description 57
- 238000005096 rolling process Methods 0.000 claims abstract description 49
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000011282 treatment Methods 0.000 claims abstract description 17
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 8
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 8
- 229910052718 tin Inorganic materials 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- 238000010583 slow cooling Methods 0.000 claims description 22
- 238000005266 casting Methods 0.000 claims description 20
- 238000007664 blowing Methods 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 13
- 238000009749 continuous casting Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 238000007670 refining Methods 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 8
- 239000005864 Sulphur Substances 0.000 claims description 8
- 238000013019 agitation Methods 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 238000006477 desulfuration reaction Methods 0.000 claims description 8
- 230000023556 desulfurization Effects 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 8
- 229910001563 bainite Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 230000008520 organization Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 239000000956 alloy Substances 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 238000007654 immersion Methods 0.000 abstract description 2
- 239000004615 ingredient Substances 0.000 abstract description 2
- RMLPZKRPSQVRAB-UHFFFAOYSA-N tris(3-methylphenyl) phosphate Chemical compound CC1=CC=CC(OP(=O)(OC=2C=C(C)C=CC=2)OC=2C=C(C)C=CC=2)=C1 RMLPZKRPSQVRAB-UHFFFAOYSA-N 0.000 abstract description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 12
- 239000010949 copper Substances 0.000 description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 6
- 229910052791 calcium Inorganic materials 0.000 description 6
- 239000011575 calcium Substances 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 238000010079 rubber tapping Methods 0.000 description 6
- 238000007711 solidification Methods 0.000 description 6
- 230000008023 solidification Effects 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 5
- 238000007689 inspection Methods 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 5
- 238000002604 ultrasonography Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
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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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- 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
-
- 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
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
-
- 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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- 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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- 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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- 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
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
- C22C38/18—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
-
- 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
-
- 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
-
- 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
- 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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- 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
- C21D2211/002—Bainite
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of Seawater corrosion-resistant steel plate and its production methods, its chemical component is by mass percentage are as follows: C 0.08%~0.12%, Si 0.25%~0.35%, Mn 1.0%~1.6%, P≤0.012%, S≤0.008%, Cr+Ni+Cu≤1.2%, Sn 0.025%~0.050%, Nb+V+Ti≤0.05%, remaining is Fe and inevitable impurity.This steel plate is added corrosion-resistant element, is cooperated the regulation of rolling parameter using microalloy treatments such as low-carbon+Nb, Ti, has high-intensitive, resistance to corrosion seawater and superior weldability.This method passes through the restriction of ingredient and rolling mill practice, regulates and controls out the tissue of alloy, reaches good obdurability matching, the heat treatment procedure removed from；Present invention process process is short, steel plate with TMCP state delivery remove from roll after be heat-treated, it is at low cost；Gained steel plate has high-intensitive, resistance to corrosion seawater and superior weldability etc., and product has high added value；Yield strength >=530MPa, 660~710MPa of tensile strength, elongation >=18%, the water immersion condition year corrosion thickness≤2mm of gained steel plate.
Description
Technical field
The present invention relates to a kind of corrosion resistant plate, especially a kind of Seawater corrosion-resistant steel plate and its production method.
Background technique
Ship and marine worker are two big systems of marine steel structure, and manufacture needs a large amount of steel material, and steel account for it
The 20%~30% of construction cost, ship steel account for the 60% of its total weight.Shipping steel is mainly ship structure steel plate, is passed through
The development of many years, China have been set up more complete ship and marine worker steel body system, and grade of steel covers early stage large-scale hull
The common intensity steel of use and present marine worker equipment frequently with welding structure unimach.
Cut deal product is widely used in high building structure, bridge, boilers and pressure vessel and its Marine engineering.In recent years
Come, the rapid development of ship and Offshore Oil Industry proposes urgent need to shipbuilding and Marine Engineering Steel.To adapt to hull
The construction demand of efficient, low maintenance cost extends deck of boat service life, proposes seawater corrosion resistance with steel to the oil cargo tank deck of boat
Requirement, maintenance cost is reduced while to improve service life.High intensity, high tenacity, easy weldability, good sea water resistance
Corrosivity is the development trend of ship and Marine Engineering Steel.In China, marine engineering equipment manufacturing industry is both marine economy
One of pith, and the important component of strategic new industry, the even more key content of equipment manufacture.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of the second best in quality Seawater corrosion-resistant steel plates；The present invention also provides
A kind of production method of Seawater corrosion-resistant steel plate.
In order to solve the above technical problems, chemical component of the present invention is by mass percentage are as follows: C 0.08%~0.12%, Si
0.25%~0.35%, Mn 1.0%~1.6%, P≤0.012%, S≤0.008%, Cr+Ni+Cu≤1.2%, Sn 0.025%~
0.050%, Nb+V+Ti≤0.05%, remaining is Fe and inevitable impurity.
Steel plate organization type of the present invention is organized for acicular ferrite+island bainite+M-A, and the face of the island M-A tissue
Product percentage≤2.3%.
The method of the present invention includes molten iron pretreatment, converter, the refining of LF+RH duplex, continuous casting, heating, rolling and slow cooling operation；
Each process technique is as described below:
(1) hot metal pre process procedures: Mg blowing desulfurization is passivated using CaO+, terminal sulphur≤0.005% is handled, is taken off after processing
Slag treatment, molten steel bare area reach 80% or more；
(2) LF+RH duplex refines: total oxygen≤25ppm, hydrogen content≤2ppm, soft blow time >=10min in RH endpoint molten steel；
(3) continuous casting working procedure: 0.85~0.95m/min of casting machine pulling rate stability contorting；Use 35 ± 2mm work under electromagnetic agitation+weight
Skill；400 ± 5A of electric current, 5 ± 0.5Hz of frequency；
(4) heating process: blank heating temperature≤1200 DEG C, in 250~260min of furnace duration；
(5) rolling process: using roughing+finish rolling Stand Mill rolling；Roughing start rolling temperature >=1020 DEG C, to temperature thickness according to 2~4
Times finished product thickness；1~1.5m/s of steel speed is thrown in finish rolling finishing temperature≤780 DEG C；15~20S of relaxation time rolls rear rapid cooling water spray
It is cooling, 750 DEG C~760 DEG C of cold temperature are opened, final cooling temperature≤450 DEG C；
(6) slow cooling operation: the offline slow cooling of steel plate is covered using high temperature tarpaulin, and slow cooling 36 hours or more.
In converter procedure described in the method for the present invention, [C%] [O%] concentration product < 0.0025%.
The beneficial effects of adopting the technical scheme are that the present invention uses at the microalloyings such as low-carbon+Nb, Ti
Reason, adds corrosion-resistant element, cooperates the regulation of rolling parameter, has high-intensitive, resistance to corrosion seawater and superior weldability.
The method of the present invention passes through the restriction of ingredient and rolling mill practice, regulates and controls out the tissue of alloy, reaches good obdurability
Matching, the heat treatment procedure removed from；Present invention process process is short, steel plate with TMCP state delivery remove from roll after be heat-treated, it is at low cost；
Gained steel plate has high-intensitive, resistance to corrosion seawater and superior weldability etc., and product has high added value；The surrender of gained steel plate
Intensity >=530MPa, 660~710MPa of tensile strength, elongation >=18%, water immersion condition year corrosion thickness≤2mm.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the metallographic structure photo of steel plate of the present invention.
Specific embodiment
The production method of this Seawater corrosion-resistant steel plate includes molten iron pretreatment, converter, the refining of LF+RH duplex, continuous casting, adds
Heat, rolling and slow cooling operation；Gained steel plate thickness is 20~50mm；Each process technique is as described below:
(1) hot metal pre process procedures: Mg blowing desulfurization is passivated using CaO+, terminal sulphur≤0.005wt% is handled, is carried out after processing
Slag treatment is taken off, molten steel bare area reaches 80% or more.
(2) converter procedure: being smelted, converter terminal C≤0.06wt% using top and bottom complex blowing, [C%] [O%] concentration product <
0.0025%, tapping process uses the strong deoxidation of Al, and whole Argon stirs 30min or more, promotes deoxidation products to float and removes.
(3) LF+RH duplex refining procedure: LF+RH duplex refining treatment is used；Total oxygen≤25ppm, hydrogen after RH application of vacuum
Content≤2ppm, soft blow time >=10min；It carries out feeding Calcium treatment after RH vacuum breaker, to Al2O3Type impurity carries out Metamorphism treatment.
(4) continuous casting working procedure: use Slab Caster production casting blank cross-section size for 280*1800mm, casting machine pulling rate is steady
Surely 0.85~0.95m/min is controlled；Using electromagnetic agitation, it is isometric to effectively improve slab by 400 ± 5A of electric current, 5 ± 0.5Hz of frequency
Brilliant rate；Using 35 ± 2mm technique under the stagnation pressure of casting blank solidification forward position, slab consistency is promoted, inherent quality is effectively improved；Under slab
Line air-cooled 48 hours or more.
(5) heating process: blank heating temperature≤1200 DEG C, in 250~260min of furnace duration；It is burnt fastly using heating furnace
(in furnace duration≤260min)+high pressure water dephosphorization >=20MPa, can effectively solve the not clean problem of copper bearing steel dephosphorization, surface of steel plate matter
It measures excellent.
(6) rolling process: using roughing+finish rolling Stand Mill rolling；Roughing start rolling temperature >=1020 DEG C, single pass rolling reduction
>=25mm, to temperature thickness according to 2~4 times of finished product thicknesses；1~1.5m/s of steel speed is thrown in finish rolling finishing temperature≤780 DEG C；After rolling
15~20s of relaxation time opens 750 DEG C~760 DEG C of cold temperature, final cooling temperature≤450 DEG C using ultrafast cold water-spraying control.
(7) slow cooling operation: the offline slow cooling of steel plate is covered using high temperature tarpaulin, and slow cooling 36 hours or more.
Embodiment 1: this Seawater corrosion-resistant steel plate and its production method are as described below.
Steel grade number is NHY EH500, steel plate thickness 20mm in this production；Chemical component is according to mass percent meter
Are as follows: C 0.12%, Si 0.25%, Mn 1.60%, S 0.002%, P 0.010%, Cr 0.35%, Ni 0.20%, Cu 0.35%, Nb
0.025%, Ti 0.018%, Sn 0.025%, remaining is Fe and inevitable impurity.
(1) hot metal pre process procedures: Mg blowing desulfurization is passivated using CaO+, handles terminal sulphur 0.003wt%, is handled laggard
Row takes off Slag treatment, and molten steel bare area reaches 86%.
(2) converter procedure: being smelted, converter terminal C=0.06% using top and bottom complex blowing, [C%] [O%] concentration product 0.0023%,
Tapping process uses the strong deoxidation of Al, and whole Argon stirs 30min.
(3) LF+RH duplex refining procedure: total oxygen 23ppm, hydrogen content 2ppm after RH application of vacuum, soft blow time 15min,
It carries out feeding Calcium treatment after RH vacuum breaker.
(4) continuous casting working procedure: use Slab Caster production casting blank cross-section size for 280*1800mm, casting machine pulling rate is steady
Surely 0.85m/min is controlled；Use electromagnetic agitation, electric current 400A, frequency 5Hz；Using 35mm technique under the stagnation pressure of casting blank solidification forward position；
Slab offline air-cooled 48 hours.
(5) heating process: 1200 DEG C of blank heating temperature, in furnace duration 250min, high pressure water dephosphorization 20MPa.
(6) it rolling process: is rolled using roughing+finish rolling Stand Mill, 1020 DEG C of roughing start rolling temperature, rough rolling step single pass
Drafts >=25mm；To temperature thickness according to 50mm；780 DEG C of finish rolling finishing temperature, throw steel speed 1m/s；Rear relaxation time 15s is rolled,
Using ultrafast cold water-spraying control, 760 DEG C of cold temperature is opened, 430 DEG C of final cooling temperature.
(7) slow cooling operation: being covered using high temperature tarpaulin, and slow cooling 36 hours.Gained steel-plate ultrasound wave inspection grade reaches I
Grade, mechanics properties testing the results are shown in Table 1；The metallographic structure photo of gained steel plate is shown in Fig. 1, and as seen from Figure 1, organization type is needle
Columnar ferrite+the island bainite+M-A tissue, and percentage≤2.3% is organized on the island M-A.
Embodiment 2: this Seawater corrosion-resistant steel plate and its production method are as described below.
Steel grade number is NHY EH500, steel plate thickness 50mm in this production；Chemical component is according to mass percent meter
Are as follows: C 0.08%, Si 0.35%, Mn 1.0%, S 0.003%, P 0.009%, Cr 0.50%, Ni 0.22%, Cu 0.25%, Nb
0.035%, Ti 0.015%, Sn 0.050%, remaining is Fe and inevitable impurity.
(1) hot metal pre process procedures: Mg blowing desulfurization is passivated using CaO+, handles terminal sulphur 0.005wt%, is handled laggard
Row takes off Slag treatment, and molten steel bare area reaches 82%.
(2) converter procedure: being smelted, converter terminal C=0.045% using top and bottom complex blowing, [C%] [O%] concentration product 0.0023%,
Tapping process uses the strong deoxidation of Al, and whole Argon stirs 35min.
(3) LF+RH duplex refining procedure: total oxygen 20ppm, hydrogen content 1.8ppm, soft blow time after RH application of vacuum
It carries out feeding Calcium treatment after 10min, RH vacuum breaker.
(4) continuous casting working procedure: use Slab Caster production casting blank cross-section size for 280*1800mm, casting machine pulling rate is steady
Surely 0.95m/min is controlled；Use electromagnetic agitation, electric current 405A, frequency 5Hz；Using 37mm technique under the stagnation pressure of casting blank solidification forward position；
Slab offline air-cooled 52 hours.
(5) heating process: 1150 DEG C of blank heating temperature, in furnace duration 260min, high pressure water dephosphorization 20MPa.
(6) it rolling process: is rolled using roughing+finish rolling Stand Mill, 1080 DEG C of roughing start rolling temperature, rough rolling step single pass
Drafts >=25mm；To temperature thickness according to 140mm；770 DEG C of finish rolling finishing temperature, throw steel speed 1.5m/s；Roll rear relaxation time
20s opens 750 DEG C of cold temperature using ultrafast cold water-spraying control, and 400 DEG C of final cooling temperature.
(7) slow cooling operation: being covered using high temperature tarpaulin, and slow cooling 36 hours.Gained steel-plate ultrasound wave inspection grade reaches I
Grade, mechanics properties testing the results are shown in Table 1.
Embodiment 3: this Seawater corrosion-resistant steel plate and its production method are as described below.
Steel grade number is NHY EH500, steel plate thickness 30mm in this production；Chemical component is according to mass percent meter
Are as follows: C 0.09%, Si 0.30%, Mn 1.2%, S 0.008%, P 0.010%, Cr 0.50%, Ni 0.20%, Cu 0.50%, Nb
0.025%, Ti 0.013%, Sn 0.040%, remaining is Fe and inevitable impurity.
(1) hot metal pre process procedures: Mg blowing desulfurization is passivated using CaO+, handles terminal sulphur 0.004wt%, is handled laggard
Row takes off Slag treatment, and molten steel bare area reaches 80%.
(2) converter procedure: being smelted, converter terminal C=0.052% using top and bottom complex blowing, [C%] [O%] concentration product 0.0024%,
Tapping process uses the strong deoxidation of Al, and whole Argon stirs 40min.
(3) LF+RH duplex refining procedure: total oxygen 22ppm, hydrogen content 1.9ppm, soft blow time after RH application of vacuum
It carries out feeding Calcium treatment after 13min, RH vacuum breaker.
(4) continuous casting working procedure: use Slab Caster production casting blank cross-section size for 280*1800mm, casting machine pulling rate is steady
Surely 0.95m/min is controlled；Use electromagnetic agitation, electric current 395A, frequency 5Hz；Using 33mm technique under the stagnation pressure of casting blank solidification forward position；
Slab offline air-cooled 50 hours.
(5) heating process: 1180 DEG C of blank heating temperature, in furnace duration 255min, high pressure water dephosphorization 25MPa.
(6) it rolling process: is rolled using roughing+finish rolling Stand Mill, 1060 DEG C of roughing start rolling temperature, rough rolling step single pass
Drafts >=25mm；To temperature thickness according to 90mm；760 DEG C of finish rolling finishing temperature, throw steel speed 1.3m/s；Roll rear relaxation time
17s opens 755 DEG C of cold temperature using ultrafast cold water-spraying control, and 410 DEG C of final cooling temperature.
(7) slow cooling operation: being covered using high temperature tarpaulin, and slow cooling 40 hours.Gained steel-plate ultrasound wave inspection grade reaches I
Grade, mechanics properties testing the results are shown in Table 1.
Embodiment 4: this Seawater corrosion-resistant steel plate and its production method are as described below.
Steel grade number is NHY EH500, steel plate thickness 40mm in this production；Chemical component is according to mass percent meter
Are as follows: C 0.11%, Si 0.32%, Mn 1.3%, S 0.004%, P 0.008%, Cr 0.50%, Ni 0.25%, Cu 0.25%, Nb
0.022%, Ti 0.010%, V 0.008, Sn 0.030%, remaining is Fe and inevitable impurity.
(1) hot metal pre process procedures: Mg blowing desulfurization is passivated using CaO+, handles terminal sulphur 0.003wt%, is handled laggard
Row takes off Slag treatment, and molten steel bare area reaches 87%.
(2) converter procedure: being smelted, converter terminal C=0.048% using top and bottom complex blowing, [C%] [O%] concentration product 0.0020%,
Tapping process uses the strong deoxidation of Al, and whole Argon stirs 42min.
(3) LF+RH duplex refining procedure: total oxygen 25ppm, hydrogen content 1.8ppm, soft blow time after RH application of vacuum
It carries out feeding Calcium treatment after 12min, RH vacuum breaker.
(4) continuous casting working procedure: use Slab Caster production casting blank cross-section size for 280*1800mm, casting machine pulling rate is steady
Surely 0.90m/min is controlled；Use electromagnetic agitation, electric current 400A, frequency 5.5Hz；Using 35mm work under the stagnation pressure of casting blank solidification forward position
Skill；Slab offline air-cooled 55 hours.
(5) heating process: 1170 DEG C of blank heating temperature, in furnace duration 258min, high pressure water dephosphorization 22MPa.
(6) it rolling process: is rolled using roughing+finish rolling Stand Mill, 1030 DEG C of roughing start rolling temperature, rough rolling step single pass
Drafts >=25mm；To temperature thickness according to 80mm；740 DEG C of finish rolling finishing temperature, throw steel speed 1.2m/s；Roll rear relaxation time
18s opens 752 DEG C of cold temperature using ultrafast cold water-spraying control, and 420 DEG C of final cooling temperature.
(7) slow cooling operation: being covered using high temperature tarpaulin, and slow cooling 45 hours.Gained steel-plate ultrasound wave inspection grade reaches I
Grade, mechanics properties testing the results are shown in Table 1.
Embodiment 5: this Seawater corrosion-resistant steel plate and its production method are as described below.
Steel grade number is NHY EH500, steel plate thickness 25mm in this production；Chemical component is according to mass percent meter
Are as follows: C 0.10%, Si 0.27%, Mn 1.4%, S 0.005%, P 0.012%, Cr 0.25%, Ni 0.40%, Cu 0.25%, Nb
0.031%, Ti 0.012%, V 0.005, Sn 0.035%, remaining is Fe and inevitable impurity.
(1) hot metal pre process procedures: Mg blowing desulfurization is passivated using CaO+, handles terminal sulphur 0.005wt%, is handled laggard
Row takes off Slag treatment, and molten steel bare area reaches 84%.
(2) converter procedure: being smelted, converter terminal C=0.056% using top and bottom complex blowing, [C%] [O%] concentration product 0.0022%,
Tapping process uses the strong deoxidation of Al, and whole Argon stirs 38min.
(3) LF+RH duplex refining procedure: total oxygen 22ppm, hydrogen content 1.7ppm, soft blow time after RH application of vacuum
It carries out feeding Calcium treatment after 16min, RH vacuum breaker.
(4) continuous casting working procedure: use Slab Caster production casting blank cross-section size for 280*1800mm, casting machine pulling rate is steady
Surely 0.90m/min is controlled；Use electromagnetic agitation, electric current 402A, frequency 4.5Hz；Using 34mm work under the stagnation pressure of casting blank solidification forward position
Skill；Slab offline air-cooled 51 hours.
(5) heating process: 1190 DEG C of blank heating temperature, in furnace duration 253min, high pressure water dephosphorization 30MPa.
(6) it rolling process: is rolled using roughing+finish rolling Stand Mill, 1050 DEG C of roughing start rolling temperature, rough rolling step single pass
Drafts >=25mm；To temperature thickness according to 100mm；750 DEG C of finish rolling finishing temperature, throw steel speed 1.4m/s；Roll rear relaxation time
16s opens 750 DEG C of cold temperature using ultrafast cold water-spraying control, and 450 DEG C of final cooling temperature.
(7) slow cooling operation: being covered using high temperature tarpaulin, and slow cooling 38 hours.Gained steel-plate ultrasound wave inspection grade reaches I
Grade, mechanics properties testing the results are shown in Table 1.
Table 1: each embodiment plate property testing result
Claims (4)
1. a kind of Seawater corrosion-resistant steel plate, which is characterized in that its chemical component is by mass percentage are as follows: C 0.08%~
0.12%, Si 0.25%~0.35%, Mn 1.0%~1.6%, P≤0.012%, S≤0.008%, Cr+Ni+Cu≤1.2%, Sn
0.025%~0.050%, Nb+V+Ti≤0.05%, remaining is Fe and inevitable impurity.
2. a kind of Seawater corrosion-resistant steel plate according to claim 1, it is characterised in that: the steel plate organization type is needle-shaped
Ferrite+the island bainite+M-A tissue, and area percent≤2.3% of the island M-A tissue.
3. the production method of Seawater corrosion-resistant steel plate as claimed in claim 1 or 2, it is characterised in that: it includes molten iron pretreatment, turns
Furnace, the refining of LF+RH duplex, continuous casting, heating, rolling and slow cooling operation；Each process technique is as described below:
(1) hot metal pre process procedures: Mg blowing desulfurization is passivated using CaO+, terminal sulphur≤0.005% is handled, is taken off after processing
Slag treatment, molten steel bare area reach 80% or more；
(2) LF+RH duplex refines: total oxygen≤25ppm, hydrogen content≤2ppm, soft blow time >=10min in RH endpoint molten steel；
(3) continuous casting working procedure: 0.85~0.95m/min of casting machine pulling rate stability contorting；Use 35 ± 2mm work under electromagnetic agitation+weight
Skill；400 ± 5A of electric current, 5 ± 0.5Hz of frequency；
(4) heating process: blank heating temperature≤1200 DEG C, in 250~260min of furnace duration；
(5) rolling process: using roughing+finish rolling Stand Mill rolling；Roughing start rolling temperature >=1020 DEG C, to temperature thickness according to 2~4
Times finished product thickness；1~1.5m/s of steel speed is thrown in finish rolling finishing temperature≤780 DEG C；15~20S of relaxation time rolls rear rapid cooling water spray
It is cooling, 750 DEG C~760 DEG C of cold temperature are opened, final cooling temperature≤450 DEG C；
(6) slow cooling operation: the offline slow cooling of steel plate is covered using high temperature tarpaulin, and slow cooling 36 hours or more.
4. a kind of production method of Seawater corrosion-resistant steel plate according to claim 3, it is characterised in that: the converter procedure
In, [C%] [O%] concentration product < 0.0025%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111139405A (en) * | 2020-03-10 | 2020-05-12 | 唐山中厚板材有限公司 | Production method of low-cost short-process flaw detection-guaranteed medium plate |
| CN111926263A (en) * | 2020-07-02 | 2020-11-13 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Large-section profiled bar direct rolling production method |
| EP4227432A4 (en) * | 2021-11-19 | 2024-06-19 | Angang Steel Company Limited | High-heat-input-welding low-temperature-resistant corrosion-resistant steel for cargo oil tanks and manufacturing method therefor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908217A (en) * | 2006-08-22 | 2007-02-07 | 武汉钢铁(集团)公司 | Sea water corrosion resistant steel for ocean drilling/production platform and preparation method thereof |
| JP2007191730A (en) * | 2006-01-17 | 2007-08-02 | Nippon Steel Corp | Steel for welded structure with excellent seawater corrosion resistance, and corrosion protection method for ship ballast tank using the same |
| CN101660108A (en) * | 2009-10-16 | 2010-03-03 | 江苏省沙钢钢铁研究院有限公司 | Non-quenched acicular structure high strength low yield ratio weathering resistant steel and production method thereof |
| JP2010185108A (en) * | 2009-02-12 | 2010-08-26 | Jfe Steel Corp | Corrosion-resistant steel material for ship, and method of manufacturing the same |
| CN101928886A (en) * | 2010-07-15 | 2010-12-29 | 南京钢铁股份有限公司 | Corrosion resistant steel for cargo oil tanks and application thereof |
| JP2013044020A (en) * | 2011-08-24 | 2013-03-04 | Jfe Steel Corp | Corrosion resistant steel material for ship ballast tank |
| CN103882307A (en) * | 2012-12-21 | 2014-06-25 | 鞍钢股份有限公司 | Corrosion-resistant steel for cargo oil tank base plate of crude oil carrier |
-
2019
- 2019-05-17 CN CN201910411802.4A patent/CN110157982B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007191730A (en) * | 2006-01-17 | 2007-08-02 | Nippon Steel Corp | Steel for welded structure with excellent seawater corrosion resistance, and corrosion protection method for ship ballast tank using the same |
| CN1908217A (en) * | 2006-08-22 | 2007-02-07 | 武汉钢铁(集团)公司 | Sea water corrosion resistant steel for ocean drilling/production platform and preparation method thereof |
| JP2010185108A (en) * | 2009-02-12 | 2010-08-26 | Jfe Steel Corp | Corrosion-resistant steel material for ship, and method of manufacturing the same |
| CN101660108A (en) * | 2009-10-16 | 2010-03-03 | 江苏省沙钢钢铁研究院有限公司 | Non-quenched acicular structure high strength low yield ratio weathering resistant steel and production method thereof |
| CN101928886A (en) * | 2010-07-15 | 2010-12-29 | 南京钢铁股份有限公司 | Corrosion resistant steel for cargo oil tanks and application thereof |
| JP2013044020A (en) * | 2011-08-24 | 2013-03-04 | Jfe Steel Corp | Corrosion resistant steel material for ship ballast tank |
| CN103882307A (en) * | 2012-12-21 | 2014-06-25 | 鞍钢股份有限公司 | Corrosion-resistant steel for cargo oil tank base plate of crude oil carrier |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111139405A (en) * | 2020-03-10 | 2020-05-12 | 唐山中厚板材有限公司 | Production method of low-cost short-process flaw detection-guaranteed medium plate |
| CN111926263A (en) * | 2020-07-02 | 2020-11-13 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Large-section profiled bar direct rolling production method |
| EP4227432A4 (en) * | 2021-11-19 | 2024-06-19 | Angang Steel Company Limited | High-heat-input-welding low-temperature-resistant corrosion-resistant steel for cargo oil tanks and manufacturing method therefor |
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Denomination of invention: A corrosion-resistant seawater steel plate and its production method Granted publication date: 20210309 Pledgee: Bank of Cangzhou Limited by Share Ltd. Yutian branch Pledgor: TANGSHAN HEAVY PLATE CO.,LTD.|TANGSHAN IRON&STEEL GROUP Co.,Ltd.|HBIS COMPANY LIMITED TANGSHAN BRANCH Registration number: Y2024980001649 |
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