CN108130488A - Anti-corrosion steel plate, the method that the steel plate is prepared using steekle mill and its application in rolling stock - Google Patents

Anti-corrosion steel plate, the method that the steel plate is prepared using steekle mill and its application in rolling stock Download PDF

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Publication number
CN108130488A
CN108130488A CN201711400739.1A CN201711400739A CN108130488A CN 108130488 A CN108130488 A CN 108130488A CN 201711400739 A CN201711400739 A CN 201711400739A CN 108130488 A CN108130488 A CN 108130488A
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China
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steel plate
corrosion
steel
rolling
continuous casting
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赵晋斌
王军
崔强
唐春霞
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Nanjing Iron and Steel Co Ltd
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Nanjing Iron and Steel Co Ltd
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Priority to CN201711400739.1A priority Critical patent/CN108130488A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/02Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226Hot rolling
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263Modifying 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
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/04Making ferrous alloys by melting
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/002Bainite
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/005Ferrite

Abstract

The present invention discloses a kind of anti-corrosion steel plate, includes the element of following weight percent:C:0.05~0.09%, Si:0.20~0.45%, Mn:0.90~1.40%, P:≤ 0.020%, S:≤ 0.005%, Cr:0.40~0.60%, Ni:0.12~0.25%, Cu:0.20~0.40%, Nb:≤ 0.060%, V:≤ 0.050%, Ti:≤ 0.035%, B:≤ 0.0020%, Alt:0.015~0.050%, remaining is Fe and inevitable impurity.Invention additionally discloses the methods that steekle mill is used to prepare above-mentioned anti-corrosion steel plate.Plate property produced by the present invention is excellent, yield strength >=450MPa, tensile strength >=550MPa, and with good toughness, weldability and mouldability, the steel construction for being particularly suitable for atmospheric corrosion condition harshness uses, and especially meets the requirement of high-intensity railway vehicle steel of new generation.

Description

Anti-corrosion steel plate prepares the method for the steel plate using steekle mill and its in railcar Application in
Technical field
The present invention relates to a kind of manufacturing methods of steel plate, and in particular to a kind of anti-corrosion steel plate is prepared using steekle mill The method of the steel plate and its application in rolling stock.
Background technology
China is currently the most flourishing country of railway transportation, and traffic density, rotation volume of goods transport, the volume of passenger transportation and cargo are sent out The amount of sending occupy No. 1 in the world, and railway transportation is self-evident for the effect of China's economy.In order to meet capacity requirement, ensure Car Turnover efficiency is had in China Railway greatly by being completed using universal vehicle.Due to delivery cargo Complexity, the degree that vehicle fails due to corrosion are still very serious.For example, in the special project of railway research institute's tissue in 2004 It is found that in investigation, the premature corrosion failure phenomenon in general purpose freight car is very serious.Due to corrosion, from compartment board upper edge under Edge, thickness are gradually thinned.This makes compartment lower part Cheng Liao cut the position changed due to failure at first, makes the big discounting of service life in compartment Button, it is impossible to reach the target of expected " time between overhauls(TBO) extends to 12 years, and service life reaches 25 years ".
To solve the above-mentioned problems, the steel plate that existing rolling stock uses is weathering steel, and the main trade mark has 09CuPCrNi And 09CuPTiRE, this kind of steel capital are hot tandem rolling mill production, hot continuous-milling steel plate be with slab (predominantly continuous casting billet) for raw material, Strip is made by roughing mills and mm finishing mill unit after heated.The hot steel band come out from finish rolling last rolling mill is cold by laminar flow But to set temperature, steel coil strip, steel coil strip after cooling, according to the different demands of user, by different are rolled by coiling machine Finishing line (smooth, aligning, crosscutting or rip cutting, examine, weigh, pack and indicate) is process as steel plate, smooth volume And rip cutting strip product.But due to hot continuous-milling steel plate narrower width, weld seam is more when making vehicle, and welding point is also relatively thin Weak, corrosion failure phenomenon is very serious, so as to influence the time between overhauls(TBO) of entire vehicle and service life.
The patent of Publication No. CN100374608C is disclosed produces rolling stock corrosion resisting steel using hot tandem rolling mill The method of plate is coil of strip after rolling, and the coil of strip that temperature is 650 ± 30 DEG C is also needed to be packed into the bell furnace of heated by gas In, it anneals within 6-12 hours in 700 ± 10 DEG C of heat preservations, outer cover is hung away after annealing, in air natural cooling.The technique stream of the patent Journey is complicated and cost is higher.
The patent application of Publication No. CN103695801A discloses a kind of high tenacity, high weather resistance steel and its manufacturing method, The high tenacity, high weather resistance steel composition by weight percent be:C0.035~0.075%, Si≤0.30%, Mn0.40~ 0.80%th, P0.07~0.11%, S≤0.004%, Cu0.20~0.50%, Ni0.10~0.40%, Cr0.40~0.70%, Ti0.008~0.016%, Nb0.010~0.030%, N≤0.0050%, Ca0.001%~0.004%, remaining be Fe and not It can avoid being mingled with;Based on it uses the carbon manganese steel component system of the low Mn high P of low C, pass through Cu+Ni+Cr alloyings, control [%C]/[%P] >=0.49, [%Mn]/[%C] >=10, weatherability index D NH >=6.50%, [%C] × ([%P]+2.5 [% S])≤0.0025, [%Ca]/[%S]=1.0~3.0, ([%Cu]+0.36 [%Ni]+0.27 [%Cr]) × [%P] >= 0.030, [%Ca] × [%S] 0.28≤0.002, using TMCP techniques, have superior low-temperature toughness, bending cold working characteristic and High-weatherability is suitable for being used as no application speed train cars body structure.But be added in the technical solution of the patent compared with More P elements, it is unfavorable to the low-temperature flexibility of steel plate.
The method that the application for a patent for invention of Publication No. CN101440424A discloses rolling high weather resistance steel, including following step Suddenly:Heating:The steel billet for being kept for 900~1000 DEG C is sent into heating furnace, is come out of the stove when steel billet temperature reaches 1050~1100 DEG C, And roughing is carried out to steel billet at this temperature;Finish rolling:After steel billet after roughing is cooled to 950 DEG C~960 DEG C, then by steel billet It is sent into mm finishing mill unit and carries out finish rolling, and steel billet is made not generate plastic deformation or plasticity change through the first rolling mill or preceding twice milling train Shape degree is within 2%;Finish to gauge:Finishing temperature is arranged on 850 DEG C~900 DEG C;It batches:Coiling temperature is arranged on 580 DEG C~640 ℃.The steel plate rolled out with this method, for yield strength in more than 700MPa, elongation percentage can reach 13%, and roll Cheng Zhong is only adjusted the temperature of steel billet, without increasing extras.The patent application only discloses a kind of roll bending Production method, and the alloying component of institute's invention steel grade is not known in it.
Invention content
The object of the present invention is to provide it is a kind of have excellent performance, the railway freight-car anti-corrosion steel plate of wider specification, reduce vehicle Weld seam improves time between overhauls(TBO) and the service life of vehicle.
It is a further object of the present invention to provide a kind of above-mentioned railway freight-car anti-corrosion steel plate is prepared using steekle mill Method.
Technical solution:The present invention provides a kind of anti-corrosion steel plate, includes the element of following weight percent:C:0.05~ 0.09%, Si:0.20~0.45%, Mn:0.90~1.40%, P:≤ 0.020%, S:≤ 0.005%, Cr:0.40~ 0.60%, Ni:0.12~0.25%, Cu:0.20~0.40%, Nb:≤ 0.060%, V:≤ 0.050%, Ti:≤ 0.035%, B:≤ 0.0020%, Alt:0.015~0.050%, remaining is Fe and inevitable impurity.
Chemical composition is one of key factor for influencing continuous casting billet internal soundness and steel plate corrosion resisting property, and the present invention is in order to make The steel obtains excellent comprehensive performance, the chemical composition of the steel is limited, reason is:
C:Main intensified element in steel can significantly improve the intensity of steel plate;But more C welds steel plate, toughness And plasticity is unfavorable.Low C designs are the formation for limiting pearlitic structrure and other carbide, and the microstructure for ensureing steel is equal Phase constitution, the potential difference avoided between out-phase cause galvanic corrosion, improve the corrosion resisting property of steel.Therefore its quality is limited Degree is 0.05-0.09%.
Si:In steel there is higher solid solubility, ferrite volume fraction in steel, crystal grain thinning can be increased, thus have Conducive to raising toughness, but too high levels can cause welding performance to decline, therefore the control of its mass percentage content is in 0.20- 0.45%.
Mn:With stronger solution strengthening effect, while the phase transition temperature of steel can be significantly reduced, refine micro- group of steel It knits, is important Strengthening and Toughening element.But Mn contents excessively increase quenching degree, so as to cause solderability and welding heat affected zone Toughness deteriorates, so controlling its mass percentage content in 0.90-1.40%.
S、P:The atmospheric corrosion resistance that the presence of sulphur will deteriorate steel, and P can effectively improve the atmospheric corrosion resistance of steel, But P content is crossed can the high toughness and plasticity for reducing steel;Meanwhile the presence of P easily causes segregation.Thus steel grade design of the present invention uses Extremely low S, P content, mass percentage content are respectively P≤0.020%, S≤0.005%.
Cr:There is significant effect to the passivation ability for improving steel, steel surface can be promoted to form fine and close passivating film or guarantor Shield property rusty scale, the enrichment in rusty scale can effectively improve rusty scale and penetrate characteristic, but excessively high to the selectivity of Korrosionsmedium On the one hand Cr improves the manufacture cost of steel plate, while unfavorable to welding and toughness, so its mass percentage content is controlled to exist Between 0.40~0.60%.
Ni:It is that can improve intensity to improve the element of toughness simultaneously, and quenching degree can be improved, can effectively prevents that Cu's is hot-short Caused check crack.Since Ni is precious metal element, for cost factor, and excessively high Ni can improve the adhesiveness of oxide skin, Hot rolling defect can be formed on surface by being pressed into steel.So its mass percentage content is defined to 0.12~0.25%.
Cu:Have the function of to be substantially the same with Ni, there is solid solution and precipitation enhancement, suitably matched with Ni, it can be notable The atmospheric corrosion resistance of steel is improved, but excessively high unfavorable to welding, and check crack easily occurs during hot rolling, mass percentage content control System is in 0.20-0.40%.
Nb、V:It is strong carbide former, but more Nb and V is unfavorable to welding, so its mass percent contains Amount is defined to Nb≤0.060%, V≤0.050%.
Ti:Titanium can fix the GN 2 in steel, form titanium nitride, prevent the crystal grain in heating, rolling, welding process long Greatly, improve the toughness of base material and welding heat affected zone.Titanium Composition Control of the present invention is ≤0.035%.
Al is the deoxidier added in steel, and mass percentage content is that the Al of 0.015-0.050% is conducive to crystal grain thinning, Improve the toughness and tenacity of steel.
Another aspect of the present invention provides a kind of method for preparing above-mentioned anti-corrosion steel plate, and this method includes the following steps:
1) continuous casting process is smelted:Desulfurizing iron pretreatment, converter smelting, LF refining, RH application of vacuum, company are carried out successively Casting, obtains continuous casting billet;
2) rolling mill practice:Enter steekle mill after continuous casting billet made from step 1) is heated to 1160 DEG C~1250 DEG C, adopt It is rolled with Controlled Rolling And Controlled Cooling;Wherein, steel plate thickness is rolling to≤30mm after be sent into curling stove and roll, enter for the first time Steel billet temperature >=900 DEG C when crimping stove rolling, finishing temperature are 750~850 DEG C, and it is 0.5~3.0m/s to throw steel speed;
3) cold technique is controlled:The product control cooling rolling to step 2), it is 450~650 to control cold rear red temperature DEG C, it is then air-cooled, it is evenly distributed the steel plate of ferrite and bainite structure.
In order to which sulphur, phosphorus content in the steel plate finally obtained is made to maintain relatively low level, make in step 1), desulfurizing iron is pre- Sulphur weight content≤0.002% in product is handled, phosphorus weight content≤0.015% in converter smelting product.
To make to obtain the steel plate with good corrosion resistance, toughness, weldability and mouldability, make in step 1), LF essences Refining operates desulfating and deoxidation using white slag, hydrogen weight content≤2.5ppm in control atmosphere during RH application of vacuum;In continuous casting control Packet temperature is in liquidus curve+5~35 DEG C;
In step 2), continuous casting billet heating time meets formula 1:
The heating strand time=(0.9~1.6) × slab thickness mm × 1min/mm---------- formula 1;
Total reduction >=65% of rolling;Furnace temperature control is crimped at 750~950 DEG C.
In step (3), it is air-cooled to steel billet temperature≤400 DEG C.
Advantageous effect:The present invention by controlling a variety of chemical compositions in steel plate in particular range, and coordinate respectively Equally distributed ferrite+bainite structure in steel plate, acquisition function admirable, yield strength >=450MPa, tensile strength >= The anti-corrosion steel plate of 550MPa, and steel plate has good toughness, weldability and mouldability, and it is severe to be particularly suitable for atmospheric corrosion condition The steel construction at quarter uses, and especially meets the requirement of high-intensity railway vehicle steel of new generation.It is manufactured in the present invention above-mentioned corrosion-resistant The method of steel plate by continuous casting process, strictly controls the harmful elements such as S, P, using the pair rolling of steekle mill, and controls work Technological parameter in skill, the railway freight-car anti-corrosion steel plate that just availability is stablized are raw without special equipment and operation Production. art is simple, and operability is strong, and product quality is stablized.
Description of the drawings
Fig. 1 is the microphoto of anti-corrosion steel plate tissue.
Specific embodiment
Embodiment 1
Anti-corrosion steel plate includes the element of following weight percent:C:0.060%, Si:0.38%, Mn:1.32%, P: 0.009%, S:0.002%, Cr:0.55%, Ni:0.22%, Cu:0.35%, Nb:0.020%, V:0.010%, Ti: 0.020%, B:0.0003%, Alt:0.033%, remaining is Fe and inevitable impurity.Corrosion resistant is prepared using steekle mill The method of steel plate is lost, is as follows:
(1) continuous casting process is smelted:Desulfurizing iron pretreatment, converter smelting, LF refining, RH application of vacuum, company are carried out successively Casting, obtains continuous casting billet;Wherein, sulphur weight content≤0.002% in desulfurizing iron pretreatment product, in the converter smelting product Phosphorus weight content≤0.015%;
Converter smelting and LF refining:Using converter smelting, by top blast, the weight percent content of decarburization to C≤ 0.04%;Then desulfurization, alloying are carried out using LF refining, the chemical component weight degree for obtaining molten steel is as shown in table 1:
The 1 practical chemical composition of molten steel sample of table
Element species Content (wt%)
C 0.060
Si 0.38
Mn 1.32
P 0.009
S 0.002
Ni 0.22
Cu 0.35
Cr 0.55
Nb 0.020
V 0.010
Ti 0.020
B 0.0003
Alt (full aluminium) 0.033
Continuous casting:By sheet billet continuous casting on molten steel;
(2) rolling mill practice:Enter steekle mill after continuous casting billet made from step (1) is heated to 1250 DEG C, using controlled rolling Control refrigeration technique is rolled;Wherein, steel plate thickness is rolling to≤30mm after be sent into curling stove and roll, enter to crimp stove for the first time Steel billet temperature >=900 DEG C during rolling, finishing temperature are 750~850 DEG C, and it is 0.5~3.0m/s to throw steel speed;
(3) cold technique is controlled:Cooling is controlled after rolling, it is 500 DEG C to control cold rear red temperature, then air-cooled, is obtained uniformly The steel plate of ferrite and bainite structure is distributed with.The microphoto of the anti-corrosion steel plate tissue of steel plate is as shown in Figure 1.
Embodiment 2
Anti-corrosion steel plate includes the element of following weight percent:C:0.050%, Si:0.30%, Mn:1.40%, P: 0.020%, S:0.003%, Cr:0.40%, Ni:0.12%, Cu:0.40%, Nb:0.40%, V:0.030%, Ti: 0.035%, B:0.001%, Alt:0.050%, remaining is Fe and inevitable impurity.It is prepared using steekle mill corrosion-resistant The method of steel plate, is as follows:
(1) continuous casting process is smelted:Desulfurizing iron pretreatment, converter smelting, LF refining, RH application of vacuum, company are carried out successively Casting, obtains continuous casting billet;
Wherein, sulphur weight content≤0.002% in desulfurizing iron pretreatment product, phosphorus weight in the converter smelting product Content≤0.015%;Converter smelting and LF refining:Using converter smelting, pass through top blast, the weight percent content of decarburization to C ≤ 0.04%;Then desulfurization, alloying are carried out using LF refining, obtains chemical component weight degree such as 2 institute of table of molten steel Show:
The 2 practical chemical composition of molten steel sample of table
Continuous casting:By sheet billet continuous casting on molten steel;
(2) rolling mill practice:Enter steekle mill after continuous casting billet made from step 1) is heated to 1160 DEG C DEG C, using controlled rolling Control refrigeration technique is rolled;Wherein, steel plate thickness is rolling to≤30mm after be sent into curling stove and roll, enter to crimp stove for the first time Steel billet temperature >=900 DEG C during rolling, finishing temperature are 750~850 DEG C, and it is 0.5~3.0m/s to throw steel speed;
(3) cold technique is controlled:Cooling is controlled after rolling, it is 450 DEG C to control cold rear red temperature, then air-cooled, is obtained uniformly The steel plate of ferrite and bainite structure is distributed with.The microphoto of the anti-corrosion steel plate tissue of steel plate is as shown in Figure 1.
Embodiment 3
Anti-corrosion steel plate includes the element of following weight percent:C:0.070%, Si:0.45%, Mn:1.25%, P: 0.017%, S:0.005%, Cr:0.60%, Ni:0.25%, Cu:0.30%, Nb:0.050%, V:0.050%, Ti: 0.035%, B:0.0020%, Alt:0.015%, remaining is Fe and inevitable impurity.Corrosion resistant is prepared using steekle mill The method of steel plate is lost, is as follows:
(1) continuous casting process is smelted:Desulfurizing iron pretreatment, converter smelting, LF refining, RH application of vacuum, company are carried out successively Casting, obtains continuous casting billet;
Wherein, sulphur weight content≤0.002% in desulfurizing iron pretreatment product, phosphorus weight in the converter smelting product Content≤0.015%;Converter smelting and LF refining:Using converter smelting, pass through top blast, the weight percent content of decarburization to C ≤ 0.04%;Then desulfurization, alloying are carried out using LF refining, obtains chemical component weight degree such as 2 institute of table of molten steel Show:
The 3 practical chemical composition of molten steel sample of table
Continuous casting:By sheet billet continuous casting on molten steel;
(2) rolling mill practice:Enter steekle mill after continuous casting billet made from step 1) is heated to 1250 DEG C, using controlled rolling control Refrigeration technique is rolled;Wherein, steel plate thickness is rolling to≤30mm after be sent into curling stove and roll, enter to crimp stove for the first time and roll Steel billet temperature >=900 DEG C when processed, finishing temperature are 750~850 DEG C, and it is 0.5~3.0m/s to throw steel speed;
(3) cold technique is controlled:Cooling is controlled after rolling, it is 650 DEG C to control cold rear red temperature, then air-cooled, is obtained uniformly The steel plate of ferrite and bainite structure is distributed with.The microphoto of the anti-corrosion steel plate tissue of steel plate is as shown in Figure 1.
The rolling technological parameter of Examples 1 to 3 is as shown in table 4:
The pair rolling technological parameter of 4 each embodiment of table
Mechanical property tests are carried out to 3 groups of steel plate samples of Examples 1 to 3 method production, experimental result is as shown in table 5:
The comprehensive mechanical property of 5 each embodiment steel plate of table
Also, under 500 times of light microscopes, the typical organization at above-mentioned steel plate sample through-thickness 1/4 is carried out It takes pictures, as shown in Figure 1, for ferrite+bainite, and even tissue.

Claims (10)

1. a kind of anti-corrosion steel plate, which is characterized in that the anti-corrosion steel plate includes the element of following weight percent:C:0.05~ 0.09%, Si:0.20~0.45%, Mn:0.90~1.40%, P:≤ 0.020%, S:≤ 0.005%, Cr:0.40~ 0.60%, Ni:0.12~0.25%, Cu:0.20~0.40%, Nb:≤ 0.060%, V:≤ 0.050%, Ti:≤ 0.035%, B:≤ 0.0020%, Alt:0.015~0.050%, remaining is Fe and inevitable impurity.
A kind of 2. method for preparing anti-corrosion steel plate described in claim 1, which is characterized in that this method includes the following steps:
1) continuous casting process is smelted:Desulfurizing iron pretreatment, converter smelting, LF refining, RH application of vacuum, continuous casting are carried out successively, are obtained To continuous casting billet;
2) rolling mill practice:Enter steekle mill after continuous casting billet made from step 1) is heated to 1160 DEG C~1250 DEG C, using control Control refrigeration technique is rolled to be rolled;Wherein, steel plate thickness is rolling to≤30mm after be sent into curling stove and roll, enter curling for the first time Steel billet temperature >=900 DEG C when stove rolls, finishing temperature are 750~850 DEG C, and it is 0.5~3.0m/s to throw steel speed;
3) cold technique is controlled:The product control cooling rolling to step 2), it is 450~650 DEG C to control cold rear red temperature, with It is air-cooled afterwards, it is evenly distributed the steel plate of ferrite and bainite structure.
3. according to the method described in claim 2, it is characterized in that, in step 1), after the desulfurizing iron pretreatment in product Sulphur weight content≤0.002%, phosphorus weight content≤0.015% in the converter smelting product.
4. according to the method described in claim 2, it is characterized in that, in step 1), the LF refining operates desulfurization using white slag Deoxidation, hydrogen weight content≤2.5ppm in control atmosphere during the RH application of vacuum;The continuous casting controls tundish temperature in liquid Phase line+5~35 DEG C.
5. according to the method described in claim 2, it is characterized in that, in step 2), continuous casting billet heating time meets formula 1:
The heating strand time=(0.9~1.6) × slab thickness mm × 1min/mm------- formulas 1.
6. according to the method described in claim 2, it is characterized in that:In step 2), total reduction >=65% of rolling.
7. the manufacturing method of steekle mill production railway freight-car anti-corrosion steel plate according to claim 2, feature exist In in step 2), the curling furnace temperature control is at 750~950 DEG C.
8. the manufacturing method of steekle mill production railway freight-car anti-corrosion steel plate according to claim 2, feature exist In in step 3), being air-cooled to steel billet temperature≤400 DEG C.
9. application of the anti-corrosion steel plate described in claim 1 in rolling stock.
10. application of the anti-corrosion steel plate described in claim 1 in railway freight-car.
CN201711400739.1A 2017-12-21 2017-12-21 Anti-corrosion steel plate, the method that the steel plate is prepared using steekle mill and its application in rolling stock Pending CN108130488A (en)

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Publication number Priority date Publication date Assignee Title
CN109266960A (en) * 2018-09-26 2019-01-25 武汉钢铁有限公司 Using the tensile strength >=800MPa thin gauge weathering steel and method of short route production
CN109457186A (en) * 2018-12-11 2019-03-12 唐山中厚板材有限公司 A kind of concrete mould bases steel plate and its production method
CN112941424A (en) * 2021-02-10 2021-06-11 中国铁道科学研究院集团有限公司金属及化学研究所 Novel corrosion-resistant steel for railway vehicle and manufacturing method thereof
CN112974562A (en) * 2021-03-31 2021-06-18 甘肃酒钢集团宏兴钢铁股份有限公司 Production method of stainless steel hot-rolled coil for welding strip
CN114561586A (en) * 2021-12-02 2022-05-31 安阳钢铁股份有限公司 Steckel mill thin-specification bridge weathering steel and production method thereof

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109266960A (en) * 2018-09-26 2019-01-25 武汉钢铁有限公司 Using the tensile strength >=800MPa thin gauge weathering steel and method of short route production
CN109457186A (en) * 2018-12-11 2019-03-12 唐山中厚板材有限公司 A kind of concrete mould bases steel plate and its production method
CN109457186B (en) * 2018-12-11 2020-08-04 唐山中厚板材有限公司 Steel plate for concrete formwork and production method thereof
CN112941424A (en) * 2021-02-10 2021-06-11 中国铁道科学研究院集团有限公司金属及化学研究所 Novel corrosion-resistant steel for railway vehicle and manufacturing method thereof
CN112974562A (en) * 2021-03-31 2021-06-18 甘肃酒钢集团宏兴钢铁股份有限公司 Production method of stainless steel hot-rolled coil for welding strip
CN114561586A (en) * 2021-12-02 2022-05-31 安阳钢铁股份有限公司 Steckel mill thin-specification bridge weathering steel and production method thereof

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