CN108728742A - A kind of manufacturing method of antidetonation fire resisting corrosion-resisting steel and medium plate and sheet metal - Google Patents
A kind of manufacturing method of antidetonation fire resisting corrosion-resisting steel and medium plate and sheet metal Download PDFInfo
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- 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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- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- 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
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- C21D2211/001—Austenite
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- 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
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Abstract
The invention discloses the manufacturing methods of a kind of antidetonation fire resisting corrosion-resisting steel and medium plate and sheet metal, belong to steel construction steel technical field, solve the problems, such as that the comprehensive performances such as the antidetonation fire resisting of existing steel building steel is anti-corrosion are poor.Consisting of：C：0.05~0.11wt.%, Si：0.10~0.30wt.%, Mn：1.00~2.00wt.%, Ni：1.00~1.50wt.%, Cu：1.00~1.50wt.%, Mo：0.50~0.60wt.%, Nb：0.05~0.10wt.%, V：0.05~0.10wt.%, Ti：0.010~0.030wt.%, Al：0.015~0.035wt.%, B：0~0.0018wt.%, P：<0.015wt.%, S：<0.010wt.%, remaining is Fe and inevitable impurity.Above-mentioned manufacturing method uses converter or electric furnace smelting, casting to use continuous casting or molding.Above-mentioned antidetonation fire resisting corrosion-resisting steel can be used for steel building.
Description
Technical field
The invention belongs to steel construction steel technical field, it is related to a kind of antidetonation fire resisting corrosion-resisting steel and medium plate and Bao Gang
The manufacturing method of plate.
Background technology
Steel building has that space availability ratio is big, flexible design is beautiful, advantages, the demand such as Ke Xunhuanliyong increasingly increase
It is more.However, the fire resistance and corrosion resistance of normal steel structure steel be not good enough, generally require coated with multiple layer, thicker corrosion-proof paint and
Fireproof coating solves the problems, such as security against fire and prevents corrosion, is greatly improved the construction cost of steel building, extends
Construction period.Therefore, realize the chemical conversion of the function and services such as antidetonation, fire resisting, anti-corrosion for the development trend of steel construction steel.
Corrosion resisting property is different because of application environment, is technically mainly limited by cost of alloy, and anti-seismic performance requires steel normal
The lower elongation percentage with 0.85 yield tensile ratio below, 17%-20% or more of temperature, fire resistance require 600 DEG C of high temperature yields of steel
Intensity is not less than 2/3 that room-temperature yield strength standard requires, both rear requirement for 600MPa grades of yield strength and its more than
There is prodigious technological challenge for steel construction steel.
Invention content
In view of above-mentioned analysis, the present invention is intended to provide a kind of antidetonation fire resisting corrosion-resisting steel and its manufacturing method, solve existing
The poor problems of comprehensive performances such as the antidetonation fire resistings of some steel building steel is anti-corrosion.
The purpose of the present invention is mainly achieved through the following technical solutions：
On the one hand, the present invention provides a kind of antidetonation fire resisting corrosion-resisting steel, group becomes：C：0.05~0.11wt.%, Si：
0.10~0.30wt.%, Mn：1.00~2.00wt.%, Ni：1.00~1.50wt.%, Cu：1.00~1.50wt.%, Mo：
0.50~0.60wt.%, Nb：0.05~0.10wt.%, V：0.05~0.10wt.%, Ti：0.010~0.030wt.%, Al：
0.015~0.035wt.%, B：0~0.0018wt.%, P：<0.015wt.%, S：<0.010wt.%, remaining is Fe and can not
The impurity avoided.
Further, group becomes：C：0.05~0.09wt.%, Si：0.25~0.28wt.%, Mn：1.10~
1.80wt.%, Ni：1.15~1.45wt.%, Cu：1.05~1.45wt.%, Mo：0.55~0.58wt.%, Nb：0.06~
0.09wt.%, V：0.058~0.092wt.%, Ti：0.015~0.028wt.%, Al：0.025~0.030wt.%, B：
0.0002~0.0012wt.%, P：<0.015wt.%, S：<0.010wt.%, remaining is Fe and inevitable impurity.
Further, antidetonation fire resisting corrosion-resisting steel be thickness 40mm or more steel plate, B content be 0.0008~
0.0018wt.%.
On the other hand, the present invention also provides a kind of manufacturing methods of the anti-corrosion medium plate of antidetonation fire resisting, using above-mentioned anti-
Fire resisting corrosion-resisting steel is shaken, medium plate is the steel plate that thickness is more than 20mm；
Manufacturing method includes the following steps：
Step 1：Continuous casting billet or ingot casting are heated, soaking obtains the steel billet after soaking；
Step 2：Hot rolling roughing and hot fine rolling are carried out to the steel billet after soaking, obtain the steel plate after hot rolling；
Step 3：First time section cooling is carried out to the steel billet after hot rolling, the red temperature of first time section cooling is 400
DEG C hereinafter, then carry out air-cooled acquisition martensitic structure for the first time, obtain it is air-cooled for the first time after steel billet；
Step 4：Heating steel billet after air-cooled to first time obtains heat to 650-700 DEG C of progress two-phase section Isothermal treatment
Treated steel billet；
Step 5：Second of section cooling, the red temperature 400- of second of section cooling are carried out to the steel billet after heat treatment
500 DEG C, it is dissolved the copper of 60wt.% or more, then progress is air-cooled for the second time, obtains the anti-corrosion medium plate of antidetonation fire resisting.
Further, include the following steps：
Step 1：By the continuous casting billet after cogging or the ingot casting heating after cogging, soaking, the steel billet after soaking, heating temperature are obtained
Degree is 1180-1250 DEG C, soaking time 0.5-3h；
Step 2：Hot rolling roughing and hot fine rolling are carried out to the steel billet after soaking, obtain the steel plate after hot rolling, hot rolling roughing
3-6 passages are rolled, hot fine rolling rolls 5-10 passages, and the start rolling temperature of hot rolling roughing is 1180-1220 DEG C, the end of hot rolling roughing
It is 1135-1170 DEG C to roll temperature, and the start rolling temperature of hot fine rolling is 995-1010 DEG C, and the finishing temperature of hot fine rolling is 850-
950℃；
Step 3：First time section cooling is carried out to the steel billet after hot rolling, the red temperature of first time section cooling is 400
DEG C hereinafter, first time section cooling speed be more than 10 DEG C/s, then carry out for the first time be air-cooled to 200 DEG C or less obtain martensites
Tissue, obtain for the first time it is air-cooled after steel billet；
Step 4：To the heating steel billet after air-cooled for the first time to 650-700 DEG C of progress two-phase section Isothermal treatment, when heat preservation
Between be 0.5-3h, the steel billet after being heat-treated；
Step 5：Second of section cooling, the red temperature 400- of second of section cooling are carried out to the steel billet after heat treatment
500 DEG C, the speed of second of section cooling is more than 10 DEG C/s, is dissolved the copper of 60wt.% or more, and then progress is air-cooled for the second time,
Stress is eliminated using waste heat self tempering and carries out carbon partition, obtains the anti-corrosion medium plate of antidetonation fire resisting
In another aspect, the present invention also provides a kind of manufacturing methods of the anti-corrosion sheet metal of antidetonation fire resisting, using above-mentioned antidetonation
Fire resisting corrosion-resisting steel, medium plate are the hot continuous-milling steel plate that thickness is less than or equal to 20mm；Manufacturing method includes the following steps：
Step 1：Continuous casting billet or ingot casting are heated, soaking obtains the steel billet after soaking；
Step 2：Hot rolling roughing and hot fine rolling are carried out to the steel billet after soaking, obtain the steel plate after hot rolling；
Step 3：Segmentation section cooling is carried out to the steel plate after hot rolling, is batched, coiling temperature is 600-700 DEG C, obtains iron
Ferritic and bainite structure obtain hot continuous rolling roll bending；
Step 4：Hot continuous rolling roll bending is heat-treated twice, the steel plate after being heat-treated；
Step 5：Second of section cooling, the red temperature 400- of second of section cooling are carried out to the steel plate after heat treatment
500 DEG C, it is dissolved the copper of 60wt.% or more, then progress is air-cooled for the second time, eliminates stress using waste heat self tempering and carries out carbon and matches
Point, obtain the anti-corrosion sheet metal of antidetonation fire resisting.
Further, include the following steps：
Step 1：By the continuous casting billet after cogging or the ingot casting heating after cogging, soaking, the steel billet after soaking, heating temperature are obtained
Degree is 1180-1250 DEG C, soaking time 0.5-3h；
Step 2：Hot rolling roughing and hot fine rolling are carried out to the steel billet after soaking, obtain the steel plate after hot rolling, hot rolling roughing
3-6 passages are rolled, hot fine rolling rolls 5-10 passages, and the start rolling temperature of hot rolling roughing is 1180-1220 DEG C, the end of hot fine rolling
It is 850-950 DEG C to roll temperature；
Step 3：Segmentation section cooling is carried out to the steel plate after hot rolling, is batched, coiling temperature is 600-700 DEG C, obtains iron
Ferritic and bainite structure obtain hot continuous rolling roll bending；
Step 4：Hot continuous rolling roll bending carries out two after cross shearing unit is cut, slightly rectified, using press quenching heat-treatment production line
Secondary heat treatment, the roll bending after being heat-treated.
Step 5：Second of section cooling, the red temperature 400- of second of section cooling are carried out to the roll bending after heat treatment
500 DEG C, the speed of second of section cooling is more than 10 DEG C/s, is dissolved the copper of 60wt.% or more, and then progress is air-cooled for the second time,
Stress is eliminated using waste heat self tempering and carries out carbon partition, obtains the anti-corrosion sheet metal of antidetonation fire resisting.
Further, the method for sub-sectional cooling is as follows：First segment is water cooling, and first segment cooling velocity is more than 20 DEG C/s；The
Two sections are air-cooled, and third section is compensation section cooling, 3-10 DEG C/s of third section cooling velocity.
Further, in being heat-treated twice, heat treatment for the first time is austenitizing-quenching heat treatment, is included the following steps：
It is heated to 850-950 DEG C of progress isothermal, soaking time 20min-60min then carries out press quenching, and returning for press quenching is red
400 DEG C of temperature is hereinafter, press quenching section cooling speed is then air-cooled to 200 DEG C or less acquisition martensite groups more than 10 DEG C/s
It knits.
Further, in being heat-treated twice, second of heat treatment is two-phase section Isothermal treatment, still uses press quenching
Heat-treatment production line is heated to 650-700 DEG C of progress isothermal, isothermal time 0.5-3h.
Compared with prior art, the present invention has the beneficial effect that：
1) antidetonation fire resisting corrosion-resisting steel provided by the invention, the main solid solution using the high temperature, solid solution, strengthened of Mo, Mo and Nb etc.
The modes such as the precipitation strength for stablizing high temperature microstructure, MC phases and Cu phase nano-particles are precipitated with Cu phase nano-particles and carry for segregation and MC phases
High high temperature tensile strength, that is, improve fire resistance；By controlling the among the austenite stabilizing elements total amounts such as Mn+Cu+Ni, in conjunction with two-phase section
The content of Heat Treatment Control room temperature retained austenite improves temperature-room type plasticity and obtains low yield strength ratio, that is, ensures anti-seismic performance；Mo,
The control of the corrosion resisting alloys such as Ni and Cu element and heterogeneous structure so that above-mentioned antidetonation fire resisting corrosion-resisting steel has excellent resistance to sea
Foreign atmospheric corrosion performance.Particularly, Cu phases formation element 60wt.% or more in tow-phase region heat treatment is in solid solution condition, and
It is retained to room temperature, when meeting fire heating, is gradually quickly precipitated when especially temperature reaches 500 DEG C or more, enhances elevated temperature strength,
Improve fire resistance.
2) manufacturing method of the anti-corrosion medium plate of antidetonation fire resisting provided by the invention, uses low C, based on Mn+Ni+Cu
Alloy designs and the combined microalloyings such as Mo-Nb-V-Ti, and the steel billet obtained to smelting and continuous casting or molding cogging carries out hot rolling-
The online offline two-phase section Isothermal treatment of direct quenching-, final obtain are analysed with tempered martensite+retained austenite+MC and Cu
The heterogeneous structure gone out has high-yield strength (600-690MPa grade) and anti-seismic performance (low yield strength ratio 0.85 and below) and Gao Yan
The comprehensive mechanical property of rate (18% or more) is stretched, while there is fire resisting, anti-corrosion function, welding performance is good.Low C, with Mn+Ni
The composition design and two-phase section Isothermal treatment of the combined microalloyings such as alloy design and Mo-Nb-V-Ti based on+Cu are to obtain
The key of above-mentioned heterogeneous structure is obtained, the resistance to ocean of Mn+Ni+Cu composite alloyings collaboration raising of especially 3.50-4.50wt.% is big
Gas corrosion performance；In the present invention after two-phase section Isothermal treatment using rapid laminar cooling, high temperature interrupt it is cooling return it is red from returning
The mode of fire, is combined with Mn+Ni+Cu composite alloyings, and collaboration stable austenite improves plasticity, and room temperature is dissolved 60wt.% or more
Copper, high temperature is precipitated when meeting fire, and reinforced nano particle is precipitated, and enhances fire resistance, and effect is notable.
3) manufacturing method of the anti-corrosion sheet metal of antidetonation fire resisting provided by the invention, uses low C, the conjunction based on Mn+Ni+Cu
The combined microalloyings such as gold design and Mo-Nb-V-Ti, the steel billet obtained to smelting and continuous casting or molding cogging carry out hot continuous rolling-
High temperature coiling-out-line quenching+two-phase section Isothermal treatment, final obtain are analysed with tempered martensite+retained austenite+MC and Cu
The heterogeneous structure gone out has high-yield strength (600-690MPa grade) and anti-seismic performance (low yield strength ratio 0.85 and below) and Gao Yan
The comprehensive mechanical property of rate (18% or more) is stretched, while there is fire resisting, anti-corrosion function, welding performance is good.Low C, with Mn+Ni
The composition design and two-phase section Isothermal treatment of the combined microalloyings such as alloy design and Mo-Nb-V-Ti based on+Cu are to obtain
The key of above-mentioned heterogeneous structure is obtained, the resistance to ocean of Mn+Ni+Cu composite alloyings collaboration raising of especially 3.50-4.50wt.% is big
Gas corrosion performance；In the present invention after two-phase section Isothermal treatment using rapid laminar cooling, high temperature interrupt it is cooling return it is red from returning
The mode of fire, is combined with Mn+Ni+Cu composite alloyings, and collaboration stable austenite improves plasticity, and room temperature is dissolved 60wt.% or more
Copper, high temperature is precipitated when meeting fire, and reinforced nano particle is precipitated, and enhances fire resistance, and effect is notable.
Other features and advantages of the present invention will illustrate in the following description, also, part becomes from specification
It is clear that understand through the implementation of the invention.The purpose of the present invention and other advantages can be by the specifications write
It realizes and obtains with structure specifically noted in claims.
Specific implementation mode
The preferred embodiment of the present invention is detailed below.
The present invention provides a kind of antidetonation fire resisting corrosion-resisting steel, composition is by mass percentage：C：0.05~
0.11wt.%, Si：0.10~0.30wt.%, Mn：1.00~2.00wt.%, Ni：1.00~1.50wt.%, Cu：1.00~
1.50wt.%, Mo：0.50~0.60wt.%, Nb：0.05~0.10wt.%, V：0.05~0.10wt.%, Ti：0.010~
0.030wt.%, Al：0.015~0.035wt.%, B：0~0.0018wt.%, P：<0.015wt.%, S：<0.010wt.%,
Remaining is Fe and inevitable impurity.
Compared with prior art, antidetonation fire resisting corrosion-resisting steel provided by the invention, main high temperature, solid solution, strengthened, the Mo for utilizing Mo
It is precipitated with Cu phase nano-particles with the solid solution segregation and MC phases of Nb etc. and stablizes high temperature microstructure, the precipitation of MC phases and Cu phase nano-particles
The modes such as reinforcing improve high temperature tensile strength, that is, improve fire resistance；It is total by controlling the among the austenite stabilizing elements such as Mn+Cu+Ni
Amount controls the content of room temperature retained austenite in conjunction with tow-phase region heat treatment, improves temperature-room type plasticity and obtains low yield strength ratio, that is, ensures
Anti-seismic performance；The control of the corrosion resisting alloys such as Mo, Ni and Cu element and heterogeneous structure so that above-mentioned antidetonation fire resisting corrosion-resisting steel tool
There is excellent resistance to sea atmosphere corrosion performance.Particularly, Cu phases formation element 60wt.% or more in tow-phase region heat treatment is in
Solid solution condition, and be retained to room temperature, it when meeting fire heating, is gradually quickly precipitated, increases when especially temperature reaches 500 DEG C or more
Strong elevated temperature strength improves fire resistance.
Specifically, in above-mentioned antidetonation fire resisting corrosion-resisting steel, the effect of each element and proportioning are according to as follows：
Carbon (C)：Solution strengthening effect is replaced with significant gap, improves the quenching degree of steel；It is also the formation member of MC phases
Element.Carbon content ranging from 0.05~0.11wt.% in steel of the present invention.Less than 0.05wt.%, it is difficult to obtain high intensity；It is higher than
0.11wt.% generates cold crack tendency in the higher aggravation of steel alloy content of the present invention, unfavorable to welding performance.
Silicon (Si)：One of deoxidant element in steel, while there is stronger solution strengthening effect, but excessive Si will deteriorate steel
Toughness and welding performance.In summary consider, silicone content ranging from 0.10~0.30wt.% in steel of the present invention.
Manganese (Mn)：The alloying element of open austenite phase field, when austenite-ferrite tow-phase region heat treatment is kept the temperature in Austria
It is enriched in family name's body phase, improves the stability of austenite, be conducive to room temperature and retain austenite；With certain solution strengthening effect,
Improve the quenching degree of steel.Manganese is most common alloying element, cost-effective, in order to give full play of solution strengthening and improve through hardening
Property effect, content is not less than 1.00wt.%, but is then unfavorable for strand segregation quality control higher than 2.00wt.%, while also dropping
Low welding performance.Manganese content ranging from 1.00~2.00wt.% in steel of the present invention.
Nickel (Ni)：With the alloying element for as manganese being also open austenite phase field, at austenite-ferrite two-phase section heat
It is enriched in austenite phase when reason heat preservation, improves the stability of austenite, be conducive to room temperature and retain austenite；Consolidate with certain
Molten invigoration effect improves the quenching degree of steel, moreover it is possible to which the progress for promoting commutative Banach aglebra reduces the resistance of dislocation motion, keeps stress loose
It relaxes, improves the plasticity and toughness of steel.In addition, the carbon equivalent coefficient of nickel element only has 1/15, be conducive to welding performance.Nickel it is not oxidizable and
Corrode, there is higher atmospheric corrosion resistance when nickel content is not less than 1.00wt.% in steel.Nickel content scope in steel of the present invention
For 1.00~1.50wt.%.
Copper (Cu)：The alloying element for expanding austenite phase field, has larger solid solubility, in ferrite in austenite
Solid solubility is then relatively small, and in ferrite copper solid solubility variation with temperature it is more sensitive.Therefore, in austenite-ferrite
When tow-phase region heat treatment is kept the temperature, a part of copper is enriched in austenite phase, improves the stability of austenite, is conducive to improve through hardening
Property and room temperature retain austenite；A part of copper is dissolved in ferrite；Some copper is in ferrite with nanometer copper particle
It is precipitated, this part copper content is drastically reduced with the raising of tow-phase region heat treatment temperature.The present invention is using higher temperature
Tow-phase region heat treatment is quickly cooled down after the completion of heat preservation, and the copper being dissolved in martensite (ferrite) and austenite will rise meeting fire
It is quickly precipitated during temperature, improves the elevated temperature strength and fire resistance of steel.Copper in steel can promote γ-Fe2O3/ γ-FeOOH to
The conversion of stable rusty scale object phase alpha-feooh can aoxidize or corrode the enrichment of rusty scale cracks, prevent corrosive medium and matrix into
One step contacts, and therefore, the addition of copper can improve the corrosion resisting property of steel.In addition, the carbon equivalent coefficient of copper only has 1/15, favorably
In welding performance.But due to copper brittleness problem, increases copper and then need to accordingly increase nickel, therefore, comprehensive cost performance considers, the present invention
Copper content ranging from 1.00~1.50wt.% in steel.Particularly, the total content scope control of manganese+nickel+copper exists in steel of the present invention
3.50~4.50wt.%, copper and nickel, molybdenum etc., which cooperate with, improves resistance to sea atmosphere corrosion performance；In conjunction with present invention tool distinctive two
Phase region is heat-treated, and copper cooperates with stable austenite with alloying elements such as manganese, nickel, improves plasticity, and the copper of considerable part solid solution meets fire analysis
Go out nanometer copper particle, enhance fire resistance, effect is notable.
Molybdenum (Mo)：Quenching degree, fire resistance and the resistance to sea atmosphere corrosion performance of steel are significantly improved, temper brittleness is reduced.
Molybdenum directly strengthens matrix by solution strengthening to improve elevated temperature strength, also segregation the interface of matrix the defects of at improve tissue
Thermal stability cooperates with Nb, V etc. to improve elevated temperature strength and is precipitated and refines MC phase nano-particles, and pinning interface, dislocation etc. lack
It falls into, elevated temperature strength is improved by precipitation strength and enhancing thermal structure stability.Molybdenum content is not less than in steel of the present invention
What 0.50wt.%, stable high temperature microstructure and MC phase nano-particles were not roughened acts on tow-phase region heat treatment and 600 DEG C of drawing by high temperature
In significantly embody, be that steel of the present invention obtains 600-690MPa level yield strengths and its matches the important leverage of high temperature tensile strength,
Resistance to sea atmosphere corrosion performance also shows excellent.Comprehensive cost performance considers, molybdenum content ranging from 0.50 in steel of the present invention~
0.60wt.%.
Niobium (Nb)：Niobium and deformation-induced precipitation the phase particles of MC containing niobium are dissolved in controlled rolling, in austenite to all have very
Strong inhibition austenite grain recrystallization and Grain refinement；The phase particles of MC containing niobium are precipitated in alternate precipitation, ferrite supersaturation
With stronger precipitation enhancement.MC phases particle in steel of the present invention also includes the elements such as V, Mo.In tow-phase region heat treatment and
When 600 DEG C of drawing by high temperature, there is a small amount of niobium solid solution in austenite and ferrite, easy segregation in interface, the dislocation the defects of at, rise
The effect for stablizing high temperature microstructure is conducive to ensure room temperature and high-temperature yield strength, i.e. room temperature high intensity and fire resistance.Content of niobium
It is unfavorable for ensureing fire resistance when less than 0.05wt.%, increases when being higher than 0.10wt.% and smelt continuous casting difficulty and improve cost.
Content of niobium is in 0.05-0.10wt.% in steel of the present invention.
Vanadium (V)：Cooperateed with niobium, molybdenum etc. and MC phases be precipitated, due to vanadium carbide nitride the solubility product in austenite relatively
Greatly, the degree of supersaturation and in bainite, martensite or ferrite matrix is larger and is largely precipitated, and has significant precipitation strength
Effect.Add a small amount of vanadium, Precipitation effect unobvious.Content of vanadium control is in 0.05-0.10wt.% in steel of the present invention.
Titanium (Ti)：Steel of the present invention is substantially carried out Trace Titanium Treatment, and titanium is mainly combined to form sized nanostructures grade titanium nitride particle with nitrogen
Son refines the austenite grain in 2 Mo Steel Slab during Heating Process.Nitrogen in steel content of the present invention is no more than 80ppm.According to the reason of titanium nitride
Think that stoicheiometry, Ti content addition are usually no more than 0.030wt.%, excessively high titanium is easy to form coarseer titanium nitride instead,
It is unfavorable for fining austenite grains, damages the toughness plasticity of steel instead.Too low titanium then cannot abundant fixed nitrogen, formation effective quantity
Titanium nitride.Ti content ranging from 0.010-0.030wt.% in steel of the present invention.
Aluminium (Al)：Aluminium is strong deoxidant element, can also be combined to form aluminium nitride with nitrogen, can play fining austenite grains
Effect.Aluminium content ranging from 0.015~0.035wt.% in steel of the present invention.
Boron (B)：Strong segregation significantly improves quenching degree, can mitigate richness at austenite grain boundary and other crystal defects
Infiltration of the segregation and copper-rich liquid phase of copper liquid phase along crystal boundary to intrinsic silicon improves the quality of hot rolling plate surface.But excessive boron
It is likely to form the boron phase unfavorable to hot-working character and toughness plasticity.Steel of the present invention can add the boron not higher than 0.0018wt.%.
Phosphorus (P) and sulphur (S)：Impurity element in steel, significantly reducing plasticity and toughness and welding performance, content should not significantly increase
It is more lower better in the case of addition sheet, therefore control respectively within 0.015wt.% and 0.010wt.%.
It, can be to above-mentioned antidetonation fire resisting corrosion-resisting steel in order to further increase the comprehensive performance of above-mentioned antidetonation fire resisting corrosion-resisting steel
Constituent does further adjustment.Illustratively, composition can be by mass percentage：C：0.05~0.09wt.%, Si：
0.25~0.28wt.%, Mn：1.10~1.80wt.%, Ni：1.15~1.45wt.%, Cu：1.05~1.45wt.%, Mo：
0.55~0.58wt.%, Nb：0.06~0.09wt.%, V：0.058~0.092wt.%, Ti：0.015~0.028wt.%,
Al：0.025~0.030wt.%, B：0.0002~0.0012wt.%, P：<0.015wt.%, S：<0.010wt.%, remaining is
Fe and inevitable impurity.
It should be noted that for the steel plate of thickness specification 40mm or more, boron content ranging from 0.0008~
0.0018wt.%.This is slower with the cooling velocity at the mid-depth position of upper steel plate because of thickness 40mm, needs to add boron
To improve the quenching degree of steel plate so that thickness also obtains martensitic structure with the center of upper steel plate.
On the other hand, the present invention also provides a kind of manufacturing method of the anti-corrosion medium plate of antidetonation fire resisting, the medium plates
Refer to the steel plate that thickness is more than 20mm, above-mentioned manufacturing method uses converter or electric furnace smelting, casting to use continuous casting or molding, can be with
It is produced, is included the following steps using heavy and medium plate mill+normal quenching heat treatment or press quenching heat-treatment production line：
Step 1：Continuous casting billet after cogging or the ingot casting after cogging are fitted into heating furnace and heated, soaking, after obtaining soaking
Steel billet, heating temperature be 1180-1250 DEG C, soaking time 0.5-3h；
Step 2：Hot rolling roughing and hot fine rolling are carried out to the steel billet after soaking using heavy and medium plate mill, after obtaining hot rolling
Steel plate, hot rolling roughing roll 3-6 passages, and hot fine rolling rolls 5-10 passages, and the start rolling temperature of hot rolling roughing is 1180-1220
DEG C, the finishing temperature of hot rolling roughing is 1135-1170 DEG C, and the start rolling temperature of hot fine rolling is 995-1010 DEG C, hot fine rolling
Finishing temperature is 850-950 DEG C；
Step 3：First time section cooling is carried out to the steel billet after hot rolling, the red temperature of first time section cooling is 400
DEG C hereinafter, first time section cooling speed be more than 10 DEG C/s, then carry out for the first time be air-cooled to 200 DEG C or less obtain martensites
Tissue, obtain for the first time it is air-cooled after steel billet；
Step 4：Steel billet after air-cooled for the first time is heat-treated, the steel billet after being heat-treated is heated to 650-700
DEG C carry out two-phase section Isothermal treatment, soaking time 0.5-3h；
Step 5：Second of section cooling, the red temperature 400- of second of section cooling are carried out to the steel billet after heat treatment
500 DEG C, the speed of second of section cooling is more than 10 DEG C/s, is dissolved the copper of 60wt.% or more, then carries out air-cooled for the second time.
Compared with prior art, the manufacturing method of the anti-corrosion medium plate of antidetonation fire resisting provided by the invention, use low C, with
The combined microalloyings such as alloy design and Mo-Nb-V-Ti based on Mn+Ni+Cu obtain smelting and continuous casting or molding cogging
Steel billet carries out the offline two-phase section Isothermal treatment of the online direct quenching-of hot rolling-, and final obtain has tempered martensite+remnants difficult to understand
The heterogeneous structure that family name body+MC and Cu are precipitated has high-yield strength (600-690MPa grades) and anti-seismic performance (low yield strength ratio 0.85
And it is following) and high-elongation (18% or more) comprehensive mechanical property, while there is fire resisting, anti-corrosion function, welding performance is good
It is good.The composition design and two-phase section of the combined microalloyings such as low C, the alloy design based on Mn+Ni+Cu and Mo-Nb-V-Ti
Isothermal treatment is the key that obtain above-mentioned heterogeneous structure, the Mn+Ni+Cu composite alloyings association of especially 3.50-4.50wt.%
With the resistance to sea atmosphere corrosion performance of raising；Using in rapid laminar cooling, high temperature after two-phase section Isothermal treatment in the present invention
The mode of red self tempering is returned in disconnected cooling, is combined with Mn+Ni+Cu composite alloyings, and collaboration stable austenite improves plasticity, room temperature
Solid solution 60wt.% or more copper (referring to the mass percent that copper after solid solution accounts for total copper content), high temperature is precipitated when meeting fire, and reinforcing is received
Rice corpuscles is precipitated, and enhances fire resistance, and effect is notable.
It should be pointed out that second of section cooling to air-cooled after 400-500 DEG C, makes full use of waste heat to eliminate martensitic phase
Varying stress and progress carbon partition, are produced from drawing effect, steel plate are made to obtain better toughness plasticity and processing performance.
Particularly, using pressure after the thickness 16mm sheet metal two-phase section Isothermal treatments below of Heavy Plate Production line production
Power quenching press carries out pressure section cooling to improve plate shape, and it is air-cooled to carry out stacking after section cooling.
In another aspect, the present invention also provides a kind of manufacturing method of the anti-corrosion sheet metal of antidetonation fire resisting, which refers to
Thickness is less than or equal to the hot continuous-milling steel plate of 20mm, and above-mentioned manufacturing method uses converter or electric furnace smelting, casting using continuous casting or
Molding, even hot rolling mill+cross shearing unit+press quenching heat-treatment production line production, includes the following steps：
Step 1：Continuous casting billet after cogging or the ingot casting after cogging are fitted into heating furnace and heated, soaking, after obtaining soaking
Steel billet, heating temperature be 1180-1250 DEG C, soaking time 0.5-3h；
Step 2：Hot rolling roughing and hot fine rolling are carried out to the steel billet after soaking using heavy and medium plate mill, after obtaining hot rolling
Steel plate, hot rolling roughing roll 3-6 passages, and hot fine rolling rolls 5-10 passages, and the start rolling temperature of hot rolling roughing is 1180-1220
DEG C, the finishing temperature of hot fine rolling is 850-950 DEG C；
Step 3：Segmentation section cooling is carried out to the steel plate after hot rolling, is batched, first segment carries out the fast quickly cooling of big yield laminar flow
But, first segment cooling velocity is more than 20 DEG C/s, and second segment is air-cooled, and third section carries out small water and compensates section cooling, third section
3-10 DEG C of cooling velocity/s, coiling temperature are 600-700 DEG C, obtain ferrite+bainite structure, obtain hot continuous rolling roll bending；
Step 4：Hot continuous rolling roll bending carries out two after cross shearing unit is cut, slightly rectified, using press quenching heat-treatment production line
Secondary heat treatment, the roll bending after being heat-treated.
Wherein, heat treatment is austenitizing-quenching heat treatment for the first time, 850-950 DEG C of progress isothermal is heated to, when heat preservation
Between be 20min-60min, then carry out press quenching, 400 DEG C of the red temperature of press quenching is hereinafter, press quenching section cooling
Speed is more than 10 DEG C/s, is then air-cooled to 200 DEG C or less acquisition martensitic structures.
Second of heat treatment is two-phase section Isothermal treatment, still uses press quenching heat-treatment production line, is heated to
650-700 DEG C of progress isothermal, isothermal time 0.5-3h.
Step 5：Second of section cooling, the red temperature 400- of second of section cooling are carried out to the steel plate after heat treatment
500 DEG C, the speed of second of section cooling is more than 10 DEG C/s, is dissolved the copper of 60wt.% or more, then carries out air-cooled for the second time.
Compared with prior art, the manufacturing method of the anti-corrosion sheet metal of antidetonation fire resisting provided by the invention, uses low C, with Mn+
The combined microalloyings such as alloy design and Mo-Nb-V-Ti based on Ni+Cu, the steel that smelting and continuous casting or molding cogging are obtained
Base carries out hot continuous rolling-high temperature coiling-out-line quenching+two-phase section Isothermal treatment, and final obtain has tempered martensite+remnants difficult to understand
The heterogeneous structure that family name body+MC and Cu are precipitated has high-yield strength (600-690MPa grades) and anti-seismic performance (low yield strength ratio
(0.85 and following) and high-elongation (18% or more)) comprehensive mechanical property, while there is fire resisting, anti-corrosion function, welding
It is functional.Low C, the alloy design based on Mn+Ni+Cu and the composition design of combined microalloyings such as Mo-Nb-V-Ti and
Two-phase section Isothermal treatment is the key that obtain above-mentioned heterogeneous structure, the especially compound conjunctions of the Mn+Ni+Cu of 3.50-4.50wt.%
Aurification collaboration improves resistance to sea atmosphere corrosion performance；It is cooling using rapid laminar after two-phase section Isothermal treatment in the present invention, in
High temperature interrupt cools down the mode for returning red self tempering, is combined with Mn+Ni+Cu composite alloyings, and collaboration stable austenite improves modeling
Property, room temperature solid solution 60wt.% or more copper, high temperature is precipitated when meeting fire, and reinforced nano particle is precipitated, enhancing fire resistance, and effect is aobvious
It writes.
Particularly, it is air-cooled to carry out stacking after second of press quenching section cooling for thickness 16mm and thin plate below, thin
The cooling of sheetpile pile is slower, makes full use of waste heat to eliminate martensite transformation stress and carries out carbon partition, is produced from drawing effect, makes
Steel plate obtains better toughness plasticity and processing performance.
Embodiment 1：By heating strand to 1180 DEG C, soaking time 2h, roughing start rolling temperature is 1200 DEG C, thick through 3 passages
It rolls, roughing finishing temperature is 1035 DEG C, and finish rolling start rolling temperature is 1000 DEG C, and finish rolling finishing temperature is 885 DEG C, through 5 passage finish rolling,
It is 40mm by steel plate thickness rolling；Section cooling is carried out to 390 DEG C to steel plate with the cooling velocity of 18 DEG C/s, is then air-cooled to room
Temperature；700 DEG C of heat preservation 0.5h in heating furnace, it is then empty with the cooling velocity of 18 DEG C/s to steel plate progress section cooling to 405 DEG C
It is cooled to room temperature.
Embodiment 2：By heating strand to 1200 DEG C, soaking time 2h, roughing start rolling temperature is 1200 DEG C, thick through 3 passages
It rolls, roughing finishing temperature is 1055 DEG C, and finish rolling start rolling temperature is 995 DEG C, and finish rolling finishing temperature is 860 DEG C, through 6 passage finish rolling,
It is 25mm by steel plate thickness rolling；Section cooling is carried out to 364 DEG C to steel plate with the cooling velocity of 15 DEG C/s, is then air-cooled to room
Temperature；680 DEG C of heat preservation 1.5h in heating furnace, it is then empty with the cooling velocity of 18 DEG C/s to steel plate progress section cooling to 420 DEG C
It is cooled to room temperature.
Embodiment 3：By heating strand to 1200 DEG C, soaking time 2h, roughing start rolling temperature is 1200 DEG C, thick through 4 passages
It rolls, roughing finishing temperature is 1070 DEG C, and finish rolling start rolling temperature is 1010 DEG C, and finish rolling finishing temperature is 901 DEG C, through 6 passage finish rolling,
It is 12mm by steel plate thickness rolling；Section cooling is carried out to 395 DEG C to steel plate with the cooling velocity of 20 DEG C/s, is then air-cooled to room
Temperature；660 DEG C of heat preservation 3h in heating furnace, it is then air-cooled with the cooling velocity of 15 DEG C/s to steel plate progress section cooling to 435 DEG C
To room temperature.
Embodiment 4：By heating strand to 1200 DEG C, soaking time 2h, roughing start rolling temperature is 1200 DEG C, thick through 3 passages
It rolls, 6 passage finish rolling, finish rolling finishing temperature is 893 DEG C, is 20mm by steel plate thickness rolling；With the leading portion cooling velocity of 22 DEG C/s
Section cooling is carried out to 663 DEG C to steel plate with the back segment cooling velocity of 5 DEG C/s, is then air-cooled to room temperature；900 DEG C in heating furnace
45min is kept the temperature, with the cooling velocity of 17 DEG C/s to steel plate progress section cooling to 382 DEG C, then 700 DEG C of heat preservations in heating furnace
0.5h carries out section cooling to 466 DEG C to steel plate with the cooling velocity of 18 DEG C/s, is then air-cooled to room temperature.
Embodiment 5：By heating strand to 1200 DEG C, soaking time 2h, roughing start rolling temperature is 1200 DEG C, thick through 4 passages
It rolls, 6 passage finish rolling, finish rolling finishing temperature is 872 DEG C, is 12mm by steel plate thickness rolling；With the leading portion cooling velocity of 23 DEG C/s
Section cooling is carried out to 628 DEG C to steel plate with the back segment cooling velocity of 7 DEG C/s, is then air-cooled to room temperature；880 DEG C in heating furnace
45min is kept the temperature, with the cooling velocity of 15 DEG C/s to steel plate progress section cooling to 375 DEG C, then 680 DEG C of heat preservations in heating furnace
1.5h carries out section cooling to 437 DEG C to steel plate with the cooling velocity of 17 DEG C/s, is then air-cooled to room temperature.
Embodiment 6：By heating strand to 1200 DEG C, soaking time 2h, roughing start rolling temperature is 1200 DEG C, thick through 4 passages
It rolls, 7 passage finish rolling, finish rolling finishing temperature is 905 DEG C, is 6mm by steel plate thickness rolling；With the leading portion cooling velocity of 21 DEG C/s and
The back segment cooling velocity of 5 DEG C/s carries out section cooling to 694 DEG C to steel plate, is then air-cooled to room temperature；880 DEG C of guarantors in heating furnace
Warm 45min, with the cooling velocity of 18 DEG C/s to steel plate progress section cooling to 393 DEG C, then 660 DEG C of heat preservations in heating furnace
13h carries out section cooling to 465 DEG C to steel plate with the cooling velocity of 15 DEG C/s, is then air-cooled to room temperature.
By each steel plate carry out Mechanics Performance Testing, the results are shown in Table 4, it can be seen from table embodiment 1, embodiment 3,
The room-temperature yield strength of embodiment 4 and embodiment 5 reaches 690MPa grades, and embodiment 2 and 6 room-temperature yield strength of embodiment reach
600MPa grades, and the yield tensile ratio of each steel plate is not higher than 0.85.Elongation percentage is not less than 18%；620 DEG C of yield strengths are all higher than room temperature
The 2/3 of yield strength standard illustrates there is good fire resistance.
Then six kinds of steel plates are subjected to corrosion resistance test, experiment condition is：At room temperature, it is soaked in artificial sea water solution
Moisten (ingredient is shown in Table 5), is comparison steel plate with common Q 345GJ steel, Corrosion results are as shown in table 6, with common Q 345GJ steel plates
Corrosion results be 1, the Corrosion results of six kinds of steel plates of the invention are not higher than the 30% of Q345 steel plate corrosion results, illustrate the present invention
Six kinds of steel plates have good corrosion resistance.
The chemical composition (wt.%) of 1 superhigh intensity antidetonation fire resisting corrosion-resisting steel of table
| C | Si | Mn | Mo | Ni | Cu | Ti | B | Nb | V | Al | P | S | |
| Embodiment 1 | 0.09 | 0.25 | 1.50 | 0.58 | 1.25 | 1.25 | 0.015 | 0.0002 | 0.085 | 0.085 | 0.025 | 0.008 | 0.002 |
| Embodiment 2 | 0.05 | 0.28 | 1.80 | 0.55 | 1.35 | 1.35 | 0.028 | 0.0004 | 0.060 | 0.063 | 0.027 | 0.008 | 0.003 |
| Embodiment 3 | 0.08 | 0.21 | 1.35 | 0.57 | 1.45 | 1.45 | 0.018 | 0.0012 | 0.090 | 0.087 | 0.030 | 0.005 | 0.003 |
| Embodiment 4 | 0.09 | 0.28 | 1.10 | 0.58 | 1.25 | 1.45 | 0.025 | 0.0003 | 0.090 | 0.092 | 0.030 | 0.006 | 0.002 |
| Embodiment 5 | 0.08 | 0.25 | 1.50 | 0.58 | 1.15 | 1.05 | 0.016 | 0.0005 | 0.090 | 0.088 | 0.028 | 0.006 | 0.003 |
| Embodiment 6 | 0.07 | 0.25 | 1.13 | 0.57 | 1.25 | 1.25 | 0.015 | 0.0002 | 0.060 | 0.058 | 0.028 | 0.009 | 0.003 |
2 superhigh intensity antidetonation fire resisting of table is anti-corrosion plate rolling and heat treatment process
3 superhigh intensity antidetonation fire resisting of table is anti-corrosion hot continuous rolling thin steel plate rolling and heat treatment process
The mechanical property of 4 superhigh intensity antidetonation fire resisting corrosion-resisting steel of table
Chemical composition in 5 artificial sea water of table
| Compound | Concentration g/L | Compound | Concentration g/L |
| NaCl | 24.53 | NaHCO3 | 0.201 |
| MgCl2 | 5.20 | KBr | 0.101 |
| Na2SO4 | 4.09 | H3BO3 | 0.027 |
| CaCl2 | 1.16 | SrCl2 | 0.025 |
| KCl | 0.695 | NaF | 0.003 |
Corrosion resistance of the 6 superhigh intensity antidetonation fire resisting corrosion-resisting steel of table in artificial sea water
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of antidetonation fire resisting corrosion-resisting steel, which is characterized in that group becomes：C：0.05~0.11wt.%, Si：0.10~
0.30wt.%, Mn：1.00~2.00wt.%, Ni：1.00~1.50wt.%, Cu：1.00~1.50wt.%, Mo：0.50~
0.60wt.%, Nb：0.05~0.10wt.%, V：0.05~0.10wt.%, Ti：0.010~0.030wt.%, Al：0.015
~0.035wt.%, B：0~0.0018wt.%, P：<0.015wt.%, S：<0.010wt.%, remaining is for Fe and unavoidably
Impurity.
2. antidetonation fire resisting corrosion-resisting steel according to claim 1, which is characterized in that group becomes：C：0.05~0.09wt.%,
Si：0.25~0.28wt.%, Mn：1.10~1.80wt.%, Ni：1.15~1.45wt.%, Cu：1.05~1.45wt.%,
Mo：0.55~0.58wt.%, Nb：0.06~0.09wt.%, V：0.058~0.092wt.%, Ti：0.015~
0.028wt.%, Al：0.025~0.030wt.%, B：0.0002~0.0012wt.%, P：<0.015wt.%, S：<
0.010wt.%, remaining is Fe and inevitable impurity.
3. antidetonation fire resisting corrosion-resisting steel according to claim 1 or 2, which is characterized in that the antidetonation fire resisting corrosion-resisting steel is thickness
The steel plate of 40mm or more is spent, B content is 0.0008~0.0018wt.%.
4. a kind of manufacturing method of the anti-corrosion medium plate of antidetonation fire resisting, which is characterized in that using such as any one of claims 1 to 3
The antidetonation fire resisting corrosion-resisting steel, the medium plate are the steel plate that thickness is more than 20mm；
The manufacturing method includes the following steps：
Step 1：Continuous casting billet or ingot casting are heated, soaking obtains the steel billet after soaking；
Step 2：Hot rolling roughing and hot fine rolling are carried out to the steel billet after soaking, obtain the steel plate after hot rolling；
Step 3：First time section cooling carried out to the steel billet after hot rolling, the red temperature of first time section cooling be 400 DEG C with
Under, then carry out air-cooled acquisition martensitic structure for the first time, obtain it is air-cooled for the first time after steel billet；
Step 4：Heating steel billet after air-cooled to first time is heat-treated to 650-700 DEG C of progress two-phase section Isothermal treatment
Steel billet afterwards；
Step 5：Second of section cooling, the red temperature 400-500 of second of section cooling are carried out to the steel billet after heat treatment
DEG C, it is dissolved the copper of 60wt.% or more, then progress is air-cooled for the second time, obtains the anti-corrosion medium plate of antidetonation fire resisting.
5. the manufacturing method of the anti-corrosion medium plate of antidetonation fire resisting according to claim 4, which is characterized in that including walking as follows
Suddenly：
Step 1：Continuous casting billet after cogging or the ingot casting heating after cogging, soaking are obtained into the steel billet after soaking, heating temperature is
1180-1250 DEG C, soaking time 0.5-3h；
Step 2：Hot rolling roughing and hot fine rolling are carried out to the steel billet after soaking, obtain the steel plate after hot rolling, hot rolling roughing rolling
3-6 passages, hot fine rolling roll 5-10 passages, and the start rolling temperature of hot rolling roughing is 1180-1220 DEG C, the finish to gauge temperature of hot rolling roughing
Degree is 1135-1170 DEG C, and the start rolling temperature of hot fine rolling is 995-1010 DEG C, and the finishing temperature of hot fine rolling is 850-950 DEG C；
Step 3：First time section cooling carried out to the steel billet after hot rolling, the red temperature of first time section cooling be 400 DEG C with
Under, the speed of first time section cooling is more than 10 DEG C/s, then carries out being air-cooled to 200 DEG C or less acquisition martensite groups for the first time
Knit, obtain for the first time it is air-cooled after steel billet；
Step 4：To 650-700 DEG C of progress two-phase section Isothermal treatment, soaking time is heating steel billet after air-cooled to first time
0.5-3h, the steel billet after being heat-treated；
Step 5：Second of section cooling, the red temperature 400-500 of second of section cooling are carried out to the steel billet after heat treatment
DEG C, the speed of second of section cooling is more than 10 DEG C/s, is dissolved the copper of 60wt.% or more, and then progress is air-cooled for the second time, utilizes
Waste heat self tempering eliminates stress and carries out carbon partition, obtains the anti-corrosion medium plate of antidetonation fire resisting.
6. a kind of manufacturing method of the anti-corrosion sheet metal of antidetonation fire resisting, which is characterized in that using as claimed in claim 1 or 2 anti-
Fire resisting corrosion-resisting steel is shaken, the medium plate is the hot continuous-milling steel plate that thickness is less than or equal to 20mm；The manufacturing method includes such as
Lower step：
Step 1：Continuous casting billet or ingot casting are heated, soaking obtains the steel billet after soaking；
Step 2：Hot rolling roughing and hot fine rolling are carried out to the steel billet after soaking, obtain the steel plate after hot rolling；
Step 3：Segmentation section cooling is carried out to the steel plate after hot rolling, is batched, coiling temperature is 600-700 DEG C, obtains ferrite
And bainite structure, obtain hot continuous rolling roll bending；
Step 4：Hot continuous rolling roll bending is heat-treated twice, the steel plate after being heat-treated；
Step 5：Second of section cooling, the red temperature 400-500 of second of section cooling are carried out to the steel plate after heat treatment
DEG C, it is dissolved the copper of 60wt.% or more, then progress is air-cooled for the second time, eliminates stress using waste heat self tempering and carries out carbon partition,
Obtain the anti-corrosion sheet metal of antidetonation fire resisting.
7. the manufacturing method of the anti-corrosion sheet metal of antidetonation fire resisting according to claim 6, which is characterized in that including walking as follows
Suddenly：
Step 1：Continuous casting billet after cogging or the ingot casting heating after cogging, soaking are obtained into the steel billet after soaking, heating temperature is
1180-1250 DEG C, soaking time 0.5-3h；
Step 2：Hot rolling roughing and hot fine rolling are carried out to the steel billet after soaking, obtain the steel plate after hot rolling, hot rolling roughing rolling
3-6 passages, hot fine rolling roll 5-10 passages, and the start rolling temperature of hot rolling roughing is 1180-1220 DEG C, the finish to gauge temperature of hot fine rolling
Degree is 850-950 DEG C；
Step 3：Segmentation section cooling is carried out to the steel plate after hot rolling, is batched, coiling temperature is 600-700 DEG C, obtains ferrite
And bainite structure, obtain hot continuous rolling roll bending；
Step 4：Hot continuous rolling roll bending is carried out hot twice after cross shearing unit is cut, slightly rectified using press quenching heat-treatment production line
Processing, the roll bending after being heat-treated.
Step 5：Second of section cooling, the red temperature 400-500 of second of section cooling are carried out to the roll bending after heat treatment
DEG C, the speed of second of section cooling is more than 10 DEG C/s, is dissolved the copper of 60wt.% or more, and then progress is air-cooled for the second time, utilizes
Waste heat self tempering eliminates stress and carries out carbon partition, obtains the anti-corrosion sheet metal of antidetonation fire resisting.
8. the manufacturing method of the anti-corrosion sheet metal of antidetonation fire resisting described according to claim 6 or 7, which is characterized in that the segmentation
Cooling method is as follows：First segment is water cooling, and first segment cooling velocity is more than 20 DEG C/s；Second segment is air-cooled, and third section is to mend
Repay section cooling, 3-10 DEG C/s of third section cooling velocity.
9. the manufacturing method of the anti-corrosion sheet metal of antidetonation fire resisting described according to claim 6 or 7, which is characterized in that it is described twice
In heat treatment, heat treatment for the first time is austenitizing-quenching heat treatment, is included the following steps：850-950 DEG C is heated to carry out etc.
Temperature, soaking time 20min-60min then carry out press quenching, and 400 DEG C of the red temperature of press quenching is hereinafter, pressure is quenched
Fire bed stream cooling velocity is more than 10 DEG C/s, is then air-cooled to 200 DEG C or less acquisition martensitic structures.
10. the manufacturing method of the anti-corrosion sheet metal of antidetonation fire resisting according to claim 9, which is characterized in that described hot twice
In processing, second of heat treatment is two-phase section Isothermal treatment, still uses press quenching heat-treatment production line, is heated to 650-
700 DEG C of progress isothermals, isothermal time 0.5-3h.
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| CN201810558143.2A Active CN108728742B (en) | 2018-06-01 | 2018-06-01 | Shock-resistant, fire-resistant and corrosion-resistant steel and manufacturing method of medium-thickness steel plate and thin steel plate |
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| CN109628836A (en) * | 2019-01-02 | 2019-04-16 | 北京科技大学 | A kind of high-strength building structure anti-seismic refractory steel and preparation method thereof |
| CN111101063A (en) * | 2020-01-07 | 2020-05-05 | 北京科技大学 | 690 MPa-grade anti-seismic, corrosion-resistant and fire-resistant medium plate steel and manufacturing method thereof |
| CN111172464A (en) * | 2020-02-28 | 2020-05-19 | 鞍钢股份有限公司 | 690 MPa-level fire-resistant weather-resistant steel plate for building structure and manufacturing method thereof |
| CN111187977A (en) * | 2020-01-07 | 2020-05-22 | 北京科技大学 | 690 MPa-grade anti-seismic, corrosion-resistant and fire-resistant medium-thickness plate steel and manufacturing method thereof |
| CN111235480A (en) * | 2020-03-17 | 2020-06-05 | 本钢板材股份有限公司 | Preparation method of high-strength steel coil |
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| CN105543704A (en) * | 2015-12-29 | 2016-05-04 | 钢铁研究总院 | High-strength, shock-resistant, fire-proof and corrosion-proof steel plate and manufacturing method |
| CN105624549A (en) * | 2015-12-29 | 2016-06-01 | 武钢集团昆明钢铁股份有限公司 | 345 MPa level anti-seismic fire-resistant and weather-resistant steel and preparing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109628836A (en) * | 2019-01-02 | 2019-04-16 | 北京科技大学 | A kind of high-strength building structure anti-seismic refractory steel and preparation method thereof |
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| CN111101063A (en) * | 2020-01-07 | 2020-05-05 | 北京科技大学 | 690 MPa-grade anti-seismic, corrosion-resistant and fire-resistant medium plate steel and manufacturing method thereof |
| CN111187977A (en) * | 2020-01-07 | 2020-05-22 | 北京科技大学 | 690 MPa-grade anti-seismic, corrosion-resistant and fire-resistant medium-thickness plate steel and manufacturing method thereof |
| CN111172464A (en) * | 2020-02-28 | 2020-05-19 | 鞍钢股份有限公司 | 690 MPa-level fire-resistant weather-resistant steel plate for building structure and manufacturing method thereof |
| CN111172464B (en) * | 2020-02-28 | 2021-05-28 | 鞍钢股份有限公司 | 690 MPa-level fire-resistant weather-resistant steel plate for building structure and manufacturing method thereof |
| CN111235480A (en) * | 2020-03-17 | 2020-06-05 | 本钢板材股份有限公司 | Preparation method of high-strength steel coil |
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