CN110512143A - Tough stainless structural steel of a kind of antidetonation fire resisting height and preparation method thereof - Google Patents

Tough stainless structural steel of a kind of antidetonation fire resisting height and preparation method thereof Download PDF

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Publication number
CN110512143A
CN110512143A CN201910848522.XA CN201910848522A CN110512143A CN 110512143 A CN110512143 A CN 110512143A CN 201910848522 A CN201910848522 A CN 201910848522A CN 110512143 A CN110512143 A CN 110512143A
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antidetonation
structural steel
fire resisting
fire
steel
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王平
赵永璞
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Priority to CN201910848522.XA priority Critical patent/CN110512143A/en
Priority to PCT/CN2019/106590 priority patent/WO2021046882A1/en
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0006—Adding metallic additives
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/064—Dephosphorising; Desulfurising
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

The present invention provides tough stainless structural steel of a kind of antidetonation fire resisting height and preparation method thereof, belongs to the field of field of steel metallurgy and building structure aseismatic, fire resisting stainless steel material.Its basis is by mass percentage are as follows: C 0.08-0.18%, Si≤0.8%, Mn≤0.8%, Cr 12.0-22.0%, Ni 1.5-2.0%, Mo 0.40-0.60%, V 0.15-0.25%, full Al 0.015-0.025%, P≤0.040%, S≤0.020%, full O≤35ppm, remaining is Fe and inevitable impurity.The stainless steel combines antidetonation, fire resisting, corrosion-resistant, high-yield strength, high-elongation performance in one, it can be used for long-life type building, bridge and marine engineering, average grain size and chromium carbon nanometer precipitated phase average-size are respectively 5-10 microns and 200-400 nanometers.

Description

Tough stainless structural steel of a kind of antidetonation fire resisting height and preparation method thereof
Technical field
The present invention relates to the technical fields of field of steel metallurgy and building structure aseismatic, fire resisting stainless steel material, especially relate to And a kind of high tough stainless structural steel of antidetonation fire resisting and preparation method thereof.
Background technique
Currently, assembled architecture is accepted extensively by industry and becomes the green oriented of building structure sustainable development. Wherein: the corrosion resistance of stainless steel receives more and more attention stainless steel in building structure, and China is also accumulating The specification such as pole research and material, design, construction, the examination of exploring stainless steel building.
Stainless steel is corrosion-resistant, beautiful, long-lived as the advantages of construction material；Such as it is established in the London Sa volt of nineteen twenty-nine Her hotel, is established in New York Chrysler mansion, and the New York Empire State Building for being established in 1931 of nineteen thirty etc., belongs to not The steel that becomes rusty is built, and is still normally being used so far.From the point of view of existing stainless steel builds use experience, although stainless steel is built Be set as being higher by carbon steel building about 10%, but 100 years using the time in, hardly need maintenance；And for carbon steel For building, 70 years use time has not had maintenance to be worth, and the time is not used only far below stainless steel building, and not Have it is corrosion-resistant, beautiful, century-old after maintenance can also continue to using building function.
And in the research of the fire resistance of weathering steel, although previous studies person has done many work, Japanese skill Art personnel also proposed many methods, these are all to be worth study and use for reference；But it is asked at present in the fire endurance of stainless steel But and it there are no relevant report in the research of topic.
For stainless steel as a kind of construction material, present disadvantage is that intensity is relatively low, if it is possible to be prepared a kind of high-strength Tough stainless steel material has both intensity height, good toughness, corrosion-resistant, beautiful, long-lived feature, then the stainless steel material is for building Way is more significant.
If above-mentioned stainless steel material also has earthquake-resistant performance and fireproof performance, the building of the stainless steel material Purposes is more extensive, and compatibility is stronger, and because natural calamity can be resisted, building is safer, and service life is also longer.And Existing stainless steel building realizes fire-resistance requirement using fireproof coating, and coating can be fallen off after a period of time, stainless steel Fire resistance be difficult to be protected.Even if brushing fireproof coating newly applies the stainless steel material after falling off at the position that falls off again Binding performance between the fireproof coating of brush and the position that falls off and the fireproof coating and the old fireproof coating in other positions newly brushed Between binding performance difference it is larger, cause fireproof coating fall off probability aggravation so that building fire-proof function failure.
The invention proposes a kind of high tough stainless structural steel of antidetonation fire resisting, which combines antidetonation, fire resisting, corrosion resistant Erosion, high-yield strength, high-elongation performance are that a kind of antidetonation for long-life type building, bridge and marine engineering is resistance in one Fiery high tough stainless structural steel.
Summary of the invention
The technical problem to be solved by the present invention is to go back stainless steel material while having corrosion resistance Have antidetonation, fire resisting, high-yield strength, high-elongation performance, overcomes existing stainless steel building and realized using fireproof coating Fire-resistance requirement, coating can be fallen off after a period of time, the technical problem that the fire resistance of stainless steel is difficult to be protected.
The present invention provides a kind of high tough stainless structural steel of antidetonation fire resisting, the high tough stainless structural steel of the antidetonation fire resisting Basis is by mass percentage are as follows: C 0.08-0.18%, Si≤0.8%, Mn≤0.8%, Cr 12.0-22.0%, Ni 1.5-2.0%, Mo 0.40-0.60%, V 0.15-0.25%, full Al 0.015-0.025%, P≤0.040%, S≤ 0.020%, full O≤35ppm, remaining is Fe and inevitable impurity.
Preferably, the average grain size of the high tough stainless structural steel of the antidetonation fire resisting is 5-10 microns, chromium carbon nanometer Precipitated phase average-size is 200-400 nanometers.
Preferably, the refractory temperature of the high tough stainless structural steel of the antidetonation fire resisting is 600 DEG C, in 600 DEG C of refractory temperatures Under fire endurance include 1 hour fire endurance, 2 hours fire endurances and 3 hours fire endurances；
Wherein: using 1 hour fire endurance in 1 hour fire resistance rating below, the fire resistance rating use below at 2 hours 2 hours fire endurances use 3 hours fire endurances in 3 hours fire resistance ratings below；Or 1 hour or less, 2 hours or less, 3 hours fire resistance ratings below all use 3 hours fire endurances.
Preferably, in 1 hour fire endurance of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >= 700MPa, breaking strength Rm >=875MPa, elongation percentage >=18%, 20 DEG C of impact absorbing energy >=40J of room temperature, -40 DEG C of impact absorbings Function >=40J；
In 2 hours fire endurances of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >=600MPa, Breaking strength Rm >=750MPa, elongation percentage >=18%, room temperature 20 DEG C of impact absorbing energy >=40J, -40 DEG C of impact absorbing energy >=40J；
In 3 hours fire endurances of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >=500MPa, Breaking strength Rm >=625MPa, elongation percentage >=18%, room temperature 20 DEG C of impact absorbing energy >=40J, -40 DEG C of impact absorbing energy >=40J.
Preferably, yield tensile ratio≤0.8 of the high tough stainless structural steel of the antidetonation fire resisting, requires according to corrosion-resistant condition, Select while meeting within the scope of the 12%Cr to the 22%Cr for meeting marine corrosion requirement of atmospheric corrosion resistance antidetonation, fire resisting and The tough structural steel of height of corrosion-resistant requirement at being grouped as.
A kind of preparation method of the high tough stainless structural steel of the antidetonation fire resisting, the preparation method comprises the following steps:
S1, raw material are low nickel lateritic nickel ore surface layer mine, are smelted by blast furnace process or ore-smelting electric furnace into molten iron, AOD is sent to blow Refining；Or send AOD to blow by the molten iron that induction furnace, the low ferronickel block of electric arc furnace smelting obtain, it is completed in AOD converting process described anti- Shake the adjustment of the ingredient lower limit target of main alloy element C, Cr, Ni, Mn, Si of the high tough stainless structural steel of fire resisting；
S2, the molten steel to blow of AOD in S1 is transferred to LF furnace, and make the carbon content of molten steel into LF furnace, phosphorus content into Enter ultimate constituent lower limit hereinafter, preventing later period carburetting, reserves finishing operations and increase C and increase P surplus；
S3, the reduction refining slag that 200-300mm thickness is added to LF furnace carry out reduction refining to the molten steel for entering LF furnace, So that deoxidation and desulfurization and progress ingredient accurately adjust；
S4, LF furnace Argon gas agitating, the degree of LF furnace Argon gas agitating reach the top of the slag and blow brokenly；Then add by steel per ton Aluminium is added in the mode for entering Al 0.8-1.2kg, and molten steel does not add aluminium deoxidation in subsequent process；It can be with when promoting white slag formation Aluminum shot is added in LF slag surface, but not handy aluminium powder substitution, prevents the vigorous combustion of aluminium powder；
S5, LF furnace Argon gas agitating start to keep white slag after ten minutes, and when clinker is excessively dilute, high ca proportion lime stone tune is added Slag enables the refining of LF furnace to go on smoothly with adjusting component to keep the foaminess of clinker；
After S6, refining, denaturation treatment is carried out to the field trash in molten steel by alkali metal core-spun yarn, so that molten steel Ingredient meets the basis of the high tough stainless structural steel of the antidetonation fire resisting；
The molten steel that refining terminates to obtain in S7, S6 send continuous casting machine casting at slab or square billet or rectangular bloom；
S8, slab or square billet or rectangular bloom inspection running repair after supercooling are ground, and carry out controlled rolling and controlled cooling in milling train later The required high tough stainless structural steel of antidetonation fire resisting is made in rolling mill practice and heat treatment；
The rolling mill practice of controlled rolling and controlled cooling and heat treatment include that controlled rolling and controlled cooling rolling end temperature controls the spray at 910-950 DEG C Leaching is cooled to 690-720 DEG C, directly sends stove back to, carries out nanoprecipitation and processing is mutually precipitated；The steel plate that can be crimped can be Stove is sent in 690-720 DEG C of curling back to, carries out nanoprecipitation and processing is mutually precipitated.
Preferably, the reduction refining slag in S3 should be by basicity CaO/SiO2It controls in the range of 2-3, reduction refining slag Ingredient is CaO:50-60% by mass percentage, wherein high-quality CaCO3Middle CaO content total amount ratio > 50%；SiO2: 25- 30%；CaF2: 10%；Remaining alumina firebrick block material.The lumpiness of reduction refining slag is less than 20mm, cannot there is powder-material, and It needs packed with sealed damp-proof bag.
Preferably, the refining in the preparation method makes field trash and oxygen sulfur content in steel reach high-purity level, always Oxygen content is less than 35ppm, and sulfur content is less than 50ppm.
Preferably, the LF furnace refining in S5 is generally no greater than 40 minutes with the time consumed by adjusting component.
Preferably, in S8 carry out nanoprecipitation be mutually precipitated processing after 700 DEG C come out and cool down, section bar can with strong wind cooling, Hot rolling plate cannot be put using immersion cooling in 200 DEG C of thermal reactors；
The Yuanping City Zhong Hou plate in S8, which soaks, to be cooled down, and cannot be stacked in 200 DEG C or more thermo-contact property.
The advantageous effects of the above technical solutions of the present invention are as follows:
The invention proposes one kind to combine antidetonation, fire resisting, corrosion-resistant, high-yield strength, high-elongation performance in one The high tough stainless structural steel of antidetonation fire resisting, average grain size is 5-10 microns, and chromium carbon nanometer precipitated phase average-size is 200-400 nanometers；Subsequent smelting process control total oxygen content is less than 35ppm, and sulfur content is less than 50ppm；And pass through controlled rolling control Cold and heat treatment, solid solution therein is with precipitation control so that average grain size and chromium carbon nanometer precipitated phase average-size reach institute Specification is needed, to ensure that the anti-seismic performance under the conditions of meeting high intensity, fire resistance, corrosion resistance.Of the invention is stainless Steel uses nanometer precipitated phase metallurgical technology, and the lower limit value of yield strength is 600MPa, has antidetonation and fire resistance applications.The steel is resistance to Chloride ion and atmospheric corrosion performance can be suitable with 304,316 stainless steels, it may have preferable pitting corrosion and intercrystalline corrosion energy Power can be not only used for construction long-life type building and bridge, it is also possible to make marine engineering construction steel.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with specific implementation Example is described in detail.
The technical problem to be solved by the present invention is to have stainless steel material also while having corrosion resistance It is anti-using fireproof coating realization to overcome existing stainless steel building for standby antidetonation, fire resisting, high-yield strength, high-elongation performance Fire requires, and coating can be fallen off after a period of time, the technical problem that the fire resistance of stainless steel is difficult to be protected.
In order to solve the above technical problems, the present invention provides a kind of high tough stainless structural steel of antidetonation fire resisting, the antidetonation is resistance to The basis of fiery high tough stainless structural steel is by mass percentage are as follows: and C 0.08-0.18%, Si≤0.8%, Mn≤ 0.8%, Cr 12.0-22.0%, Ni 1.5-2.0%, Mo 0.40-0.60%, V 0.15-0.25%, full Al 0.015- 0.025%, P≤0.040%, S≤0.020%, full O≤35ppm, remaining is Fe and inevitable impurity.
Wherein, the average grain size of the high tough stainless structural steel of the antidetonation fire resisting is 5-10 microns, the analysis of chromium carbon nanometer Phase average is having a size of 200-400 nanometers out.
Wherein, the refractory temperature of the high tough stainless structural steel of the antidetonation fire resisting is 600 DEG C, under 600 DEG C of refractory temperatures Fire endurance include 1 hour fire endurance, 2 hours fire endurances and 3 hours fire endurances；
Wherein: using 1 hour fire endurance in 1 hour fire resistance rating below, the fire resistance rating use below at 2 hours 2 hours fire endurances use 3 hours fire endurances in 3 hours fire resistance ratings below；Or 1 hour or less, 2 hours or less, 3 hours fire resistance ratings below all use 3 hours fire endurances.
Wherein, in 1 hour fire endurance of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >= 700MPa, breaking strength Rm >=875MPa, elongation percentage >=18%, 20 DEG C of impact absorbing energy >=40J of room temperature, -40 DEG C of impact absorbings Function >=40J；
In 2 hours fire endurances of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >=600MPa, Breaking strength Rm >=750MPa, elongation percentage >=18%, room temperature 20 DEG C of impact absorbing energy >=40J, -40 DEG C of impact absorbing energy >=40J；
In 3 hours fire endurances of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >=500MPa, Breaking strength Rm >=625MPa, elongation percentage >=18%, room temperature 20 DEG C of impact absorbing energy >=40J, -40 DEG C of impact absorbing energy >=40J.
Wherein, yield tensile ratio≤0.8 of the high tough stainless structural steel of the antidetonation fire resisting, requires, according to corrosion-resistant condition Antidetonation, fire resisting and resistance to are selected while met within the scope of the 12%Cr of atmospheric corrosion resistance to the 22%Cr for meeting marine corrosion requirement The tough structural steel of height that corrosion requires at being grouped as.
A kind of preparation method of the high tough stainless structural steel of the antidetonation fire resisting, the preparation method comprises the following steps:
S1, raw material are low nickel lateritic nickel ore surface layer mine, are smelted by blast furnace process or ore-smelting electric furnace into molten iron, AOD is sent to blow Refining；Or send AOD to blow by the molten iron that induction furnace, the low ferronickel block of electric arc furnace smelting obtain, it is completed in AOD converting process described anti- Shake the adjustment of the ingredient lower limit target of main alloy element C, Cr, Ni, Mn, Si of the high tough stainless structural steel of fire resisting；
S2, the molten steel to blow of AOD in S1 is transferred to LF furnace, and make the carbon content of molten steel into LF furnace, phosphorus content into Enter ultimate constituent lower limit hereinafter, preventing later period carburetting, reserves finishing operations and increase C and increase P surplus；
S3, the reduction refining slag that 200-300mm thickness is added to LF furnace carry out reduction refining to the molten steel for entering LF furnace, So that deoxidation and desulfurization and progress ingredient accurately adjust；
S4, LF furnace Argon gas agitating, the degree of LF furnace Argon gas agitating reach the top of the slag and blow brokenly；Then add by steel per ton Aluminium is added in the mode for entering Al 0.8-1.2kg, and molten steel does not add aluminium deoxidation in subsequent process；It can be with when promoting white slag formation Aluminum shot is added in LF slag surface, but not handy aluminium powder substitution, prevents the vigorous combustion of aluminium powder；
S5, LF furnace Argon gas agitating start to keep white slag after ten minutes, and when clinker is excessively dilute, high ca proportion lime stone tune is added Slag enables the refining of LF furnace to go on smoothly with adjusting component to keep the foaminess of clinker；
After S6, refining, denaturation treatment is carried out to the field trash in molten steel by alkali metal core-spun yarn, so that molten steel Ingredient meets the basis of the high tough stainless structural steel of the antidetonation fire resisting；
The molten steel that refining terminates to obtain in S7, S6 send continuous casting machine casting at slab or square billet or rectangular bloom；
S8, slab or square billet or rectangular bloom inspection running repair after supercooling are ground, and carry out controlled rolling and controlled cooling in milling train later The required high tough stainless structural steel of antidetonation fire resisting is made in rolling mill practice and heat treatment；
The rolling mill practice of controlled rolling and controlled cooling and heat treatment include that controlled rolling and controlled cooling rolling end temperature controls the spray at 910-950 DEG C Leaching is cooled to 690-720 DEG C, directly sends stove back to, carries out nanoprecipitation and processing is mutually precipitated；The steel plate that can be crimped can be Stove is sent in 690-720 DEG C of curling back to, carries out nanoprecipitation and processing is mutually precipitated
Wherein, the reduction refining slag in S3 should be by basicity CaO/SiO2Control in the range of 2-3, reduction refining slag at Divide is CaO:50-60% by mass percentage, wherein high-quality CaCO3Middle CaO content total amount ratio > 50%；SiO2: 25- 30%；CaF2: 10%；Remaining alumina firebrick block material.
The lumpiness of reduction refining slag is less than 20mm, cannot have powder-material, and need packed with sealed damp-proof bag.
Wherein, the refining in the preparation method makes field trash and oxygen sulfur content in steel reach high-purity level, total oxygen Content is less than 35ppm, and sulfur content is less than 50ppm.
Wherein, the LF furnace refining in S5 is generally no greater than 40 minutes with the time consumed by adjusting component.
Wherein, in S8 carry out nanoprecipitation be mutually precipitated processing after 700 DEG C come out and cool down, section bar can with strong wind cooling, heat Roll bending cannot be put using immersion cooling in 200 DEG C of thermal reactors；
The Yuanping City Zhong Hou plate in S8, which soaks, to be cooled down, and cannot be stacked in 200 DEG C or more thermo-contact property.
Specific high tough stainless structural steel of antidetonation fire resisting and preparation method thereof is illustrated with the following Examples:
Embodiment one:
A kind of high tough stainless structural steel of antidetonation fire resisting, the basis of the high tough stainless structural steel of the antidetonation fire resisting are pressed Mass percent is calculated as: C 0.08%, Si 0.8%, Mn 0.8%, Cr 12.0%, Ni 1.5%, Mo 0.40%, V 0.15%, full Al 0.015%, P 0.040%, S0.020%, full O 35ppm, remaining is Fe and inevitable impurity.
Wherein, the average grain size of the high tough stainless structural steel of the antidetonation fire resisting is 5 microns, chromium carbon nanometer precipitated phase Average-size is 200 nanometers.
Wherein, the refractory temperature of the high tough stainless structural steel of the antidetonation fire resisting is 600 DEG C, under 600 DEG C of refractory temperatures Fire endurance include 1 hour fire endurance, 2 hours fire endurances and 3 hours fire endurances；
Wherein: using 1 hour fire endurance in 1 hour fire resistance rating below, the fire resistance rating use below at 2 hours 2 hours fire endurances use 3 hours fire endurances in 3 hours fire resistance ratings below；Or 1 hour or less, 2 hours or less, 3 hours fire resistance ratings below all use 3 hours fire endurances.
Wherein, in 1 hour fire endurance of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >= 700MPa, breaking strength Rm >=875MPa, elongation percentage >=18%, 20 DEG C of impact absorbing energy >=40J of room temperature, -40 DEG C of impact absorbings Function >=40J；
In 2 hours fire endurances of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >=600MPa, Breaking strength Rm >=750MPa, elongation percentage >=18%, room temperature 20 DEG C of impact absorbing energy >=40J, -40 DEG C of impact absorbing energy >=40J；
In 3 hours fire endurances of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >=500MPa, Breaking strength Rm >=625MPa, elongation percentage >=18%, room temperature 20 DEG C of impact absorbing energy >=40J, -40 DEG C of impact absorbing energy >=40J.
Wherein, yield tensile ratio≤0.8 of the high tough stainless structural steel of the antidetonation fire resisting, requires, according to corrosion-resistant condition Antidetonation, fire resisting and resistance to are selected while met within the scope of the 12%Cr of atmospheric corrosion resistance to the 22%Cr for meeting marine corrosion requirement The tough structural steel of height that corrosion requires at being grouped as.
A kind of preparation method of the high tough stainless structural steel of the antidetonation fire resisting, the preparation method comprises the following steps:
S1, raw material are low nickel lateritic nickel ore surface layer mine, are smelted by blast furnace process or ore-smelting electric furnace into molten iron, AOD is sent to blow Refining；Or send AOD to blow by the molten iron that induction furnace, the low ferronickel block of electric arc furnace smelting obtain, it is completed in AOD converting process described anti- Shake the adjustment of the ingredient lower limit target of main alloy element C, Cr, Ni, Mn, Si of the high tough stainless structural steel of fire resisting；
S2, the molten steel to blow of AOD in S1 is transferred to LF furnace, and make the carbon content of molten steel into LF furnace, phosphorus content into Enter ultimate constituent lower limit hereinafter, preventing later period carburetting, reserves finishing operations and increase C and increase P surplus；
S3, the reduction refining slag that 250mm thickness is added to LF furnace carry out reduction refining to the molten steel for entering LF furnace, so as to Deoxidation and desulfurization and progress ingredient accurately adjust；
S4, LF furnace Argon gas agitating, the degree of LF furnace Argon gas agitating reach the top of the slag and blow brokenly；Then add by steel per ton Aluminium is added in the mode for entering Al 0.8kg, and molten steel does not add aluminium deoxidation in subsequent process；It can be in LF when promoting white slag formation Aluminum shot is added in slag surface, but not handy aluminium powder substitution, prevents the vigorous combustion of aluminium powder；
S5, LF furnace Argon gas agitating start to keep white slag after ten minutes, and when clinker is excessively dilute, high ca proportion lime stone tune is added Slag enables the refining of LF furnace to go on smoothly with adjusting component to keep the foaminess of clinker；
After S6, refining, denaturation treatment is carried out to the field trash in molten steel by alkali metal core-spun yarn, so that molten steel Ingredient meets the basis of the high tough stainless structural steel of the antidetonation fire resisting；
The molten steel that refining terminates to obtain in S7, S6 send continuous casting machine casting at slab；
The inspection running repair after supercooling of S8, slab is ground, and carries out the rolling mill practice and Re Chu of controlled rolling and controlled cooling in milling train later The required high tough stainless structural steel of antidetonation fire resisting is made in reason；
The rolling mill practice of controlled rolling and controlled cooling and heat treatment include that controlled rolling and controlled cooling rolling end temperature is controlled at 910 DEG C, are sprayed cold But it to 690 DEG C, directly sends stove back to, carries out nanoprecipitation and processing is mutually precipitated；The steel plate that can be crimped can be sent in 690 DEG C of curlings Tempering furnace carries out nanoprecipitation and processing is mutually precipitated.
Wherein, the reduction refining slag in S3 should be by basicity CaO/SiO2Control is in the range of 2, the ingredient of reduction refining slag It is by mass percentage CaO:50%, wherein high-quality CaCO3Middle CaO content total amount is than 60%；SiO2: 25%；CaF2: 10%；Remaining alumina firebrick block material.
The lumpiness 20mm of reduction refining slag cannot have powder-material, and need packed with sealed damp-proof bag.
Wherein, the refining in the preparation method makes field trash and oxygen sulfur content in steel reach high-purity level, total oxygen Content is less than 35ppm, and sulfur content is less than 50ppm.
Wherein, the LF furnace refining in S5 and time consumed by adjusting component are 40 minutes.
Wherein, in S8 carry out nanoprecipitation be mutually precipitated processing after 700 DEG C come out and cool down, section bar can with strong wind cooling, heat Roll bending cannot be put using immersion cooling in 200 DEG C of thermal reactors；
The Yuanping City Zhong Hou plate in S8, which soaks, to be cooled down, and cannot be stacked in 200 DEG C or more thermo-contact property.
Embodiment two:
A kind of high tough stainless structural steel of antidetonation fire resisting, the basis of the high tough stainless structural steel of the antidetonation fire resisting are pressed Mass percent is calculated as: C 0.18%, Si 0.7%, Mn 0.7%, Cr 22.0%, Ni 2.0%, Mo 0.60%, V 0.25%, full Al 0.025%, P 0.035%, S 0.015%, full O 32ppm, remaining is Fe and inevitable impurity.
Wherein, the average grain size of the high tough stainless structural steel of the antidetonation fire resisting is 10 microns, and chromium carbon nanometer is precipitated Phase average is having a size of 400 nanometers.
Wherein, the refractory temperature of the high tough stainless structural steel of the antidetonation fire resisting is 600 DEG C, under 600 DEG C of refractory temperatures Fire endurance include 1 hour fire endurance, 2 hours fire endurances and 3 hours fire endurances；
Wherein: using 1 hour fire endurance in 1 hour fire resistance rating below, the fire resistance rating use below at 2 hours 2 hours fire endurances use 3 hours fire endurances in 3 hours fire resistance ratings below；Or 1 hour or less, 2 hours or less, 3 hours fire resistance ratings below all use 3 hours fire endurances.
Wherein, in 1 hour fire endurance of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >= 700MPa, breaking strength Rm >=875MPa, elongation percentage >=18%, 20 DEG C of impact absorbing energy >=40J of room temperature, -40 DEG C of impact absorbings Function >=40J；
In 2 hours fire endurances of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >=600MPa, Breaking strength Rm >=750MPa, elongation percentage >=18%, room temperature 20 DEG C of impact absorbing energy >=40J, -40 DEG C of impact absorbing energy >=40J；
In 3 hours fire endurances of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >=500MPa, Breaking strength Rm >=625MPa, elongation percentage >=18%, room temperature 20 DEG C of impact absorbing energy >=40J, -40 DEG C of impact absorbing energy >=40J.
Wherein, yield tensile ratio≤0.8 of the high tough stainless structural steel of the antidetonation fire resisting, requires, according to corrosion-resistant condition Antidetonation, fire resisting and resistance to are selected while met within the scope of the 12%Cr of atmospheric corrosion resistance to the 22%Cr for meeting marine corrosion requirement The tough structural steel of height that corrosion requires at being grouped as.
A kind of preparation method of the high tough stainless structural steel of the antidetonation fire resisting, the preparation method comprises the following steps:
S1, raw material are low nickel lateritic nickel ore surface layer mine, are smelted by blast furnace process or ore-smelting electric furnace into molten iron, AOD is sent to blow Refining；Or send AOD to blow by the molten iron that induction furnace, the low ferronickel block of electric arc furnace smelting obtain, it is completed in AOD converting process described anti- Shake the adjustment of the ingredient lower limit target of main alloy element C, Cr, Ni, Mn, Si of the high tough stainless structural steel of fire resisting；
S2, the molten steel to blow of AOD in S1 is transferred to LF furnace, and make the carbon content of molten steel into LF furnace, phosphorus content into Enter ultimate constituent lower limit hereinafter, preventing later period carburetting, reserves finishing operations and increase C and increase P surplus；
S3, the reduction refining slag that 260mm thickness is added to LF furnace carry out reduction refining to the molten steel for entering LF furnace, so as to Deoxidation and desulfurization and progress ingredient accurately adjust；
S4, LF furnace Argon gas agitating, the degree of LF furnace Argon gas agitating reach the top of the slag and blow brokenly；Then add by steel per ton Aluminium is added in the mode for entering Al 1.2kg, and molten steel does not add aluminium deoxidation in subsequent process；It can be in LF when promoting white slag formation Aluminum shot is added in slag surface, but not handy aluminium powder substitution, prevents the vigorous combustion of aluminium powder；
S5, LF furnace Argon gas agitating start to keep white slag after ten minutes, and when clinker is excessively dilute, high ca proportion lime stone tune is added Slag enables the refining of LF furnace to go on smoothly with adjusting component to keep the foaminess of clinker；
After S6, refining, denaturation treatment is carried out to the field trash in molten steel by alkali metal core-spun yarn, so that molten steel Ingredient meets the basis of the high tough stainless structural steel of the antidetonation fire resisting；
The molten steel that refining terminates to obtain in S7, S6 send continuous casting machine casting at square billet；
The inspection running repair after supercooling of S8, square billet is ground, and carries out the rolling mill practice and Re Chu of controlled rolling and controlled cooling in milling train later The required high tough stainless structural steel of antidetonation fire resisting is made in reason；
The rolling mill practice of controlled rolling and controlled cooling and heat treatment include that controlled rolling and controlled cooling rolling end temperature is controlled at 950 DEG C, are sprayed cold But it to 720 DEG C, directly sends stove back to, carries out nanoprecipitation and processing is mutually precipitated；The steel plate that can be crimped can be sent in 720 DEG C of curlings Tempering furnace carries out nanoprecipitation and processing is mutually precipitated.
Wherein, the reduction refining slag in S3 should be by basicity CaO/SiO2Control is in the range of 3, the ingredient of reduction refining slag It is by mass percentage CaO:58%, wherein high-quality CaCO3Middle CaO content total amount is than 55%；SiO2: 30%；CaF2: 10%；Remaining alumina firebrick block material.
The lumpiness 15mm of reduction refining slag cannot have powder-material, and need packed with sealed damp-proof bag.
Wherein, the refining in the preparation method makes field trash and oxygen sulfur content in steel reach high-purity level, total oxygen Content is less than 35ppm, and sulfur content is less than 50ppm.
Wherein, in S5 LF furnace refining with adjusting component consumed by the time 38 minutes.
Wherein, in S8 carry out nanoprecipitation be mutually precipitated processing after 700 DEG C come out and cool down, section bar can with strong wind cooling, heat Roll bending cannot be put using immersion cooling in 200 DEG C of thermal reactors；
The Yuanping City Zhong Hou plate in S8, which soaks, to be cooled down, and cannot be stacked in 200 DEG C or more thermo-contact property.
Embodiment three:
A kind of high tough stainless structural steel of antidetonation fire resisting, the basis of the high tough stainless structural steel of the antidetonation fire resisting are pressed Mass percent is calculated as: C 0.14%, Si 0.6%, Mn 0.6%, Cr 17.0%, Ni 1.7%, Mo 0.50%, V 0.20%, full Al 0.020%, P0.032%, S 0.015%, full O 30ppm, remaining is Fe and inevitable impurity.
Wherein, the average grain size of the high tough stainless structural steel of the antidetonation fire resisting is 7 microns, chromium carbon nanometer precipitated phase Average-size is 300 nanometers.
Wherein, the refractory temperature of the high tough stainless structural steel of the antidetonation fire resisting is 600 DEG C, under 600 DEG C of refractory temperatures Fire endurance include 1 hour fire endurance, 2 hours fire endurances and 3 hours fire endurances；
Wherein: using 1 hour fire endurance in 1 hour fire resistance rating below, the fire resistance rating use below at 2 hours 2 hours fire endurances use 3 hours fire endurances in 3 hours fire resistance ratings below；Or 1 hour or less, 2 hours or less, 3 hours fire resistance ratings below all use 3 hours fire endurances.
Wherein, in 1 hour fire endurance of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >= 700MPa, breaking strength Rm >=875MPa, elongation percentage >=18%, 20 DEG C of impact absorbing energy >=40J of room temperature, -40 DEG C of impact absorbings Function >=40J；
In 2 hours fire endurances of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >=600MPa, Breaking strength Rm >=750MPa, elongation percentage >=18%, room temperature 20 DEG C of impact absorbing energy >=40J, -40 DEG C of impact absorbing energy >=40J；
In 3 hours fire endurances of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >=500MPa, Breaking strength Rm >=625MPa, elongation percentage >=18%, room temperature 20 DEG C of impact absorbing energy >=40J, -40 DEG C of impact absorbing energy >=40J.
Wherein, yield tensile ratio≤0.8 of the high tough stainless structural steel of the antidetonation fire resisting, requires, according to corrosion-resistant condition Antidetonation, fire resisting and resistance to are selected while met within the scope of the 12%Cr of atmospheric corrosion resistance to the 22%Cr for meeting marine corrosion requirement The tough structural steel of height that corrosion requires at being grouped as.
A kind of preparation method of the high tough stainless structural steel of the antidetonation fire resisting, the preparation method comprises the following steps:
S1, raw material are low nickel lateritic nickel ore surface layer mine, are smelted by blast furnace process or ore-smelting electric furnace into molten iron, AOD is sent to blow Refining；Or send AOD to blow by the molten iron that induction furnace, the low ferronickel block of electric arc furnace smelting obtain, it is completed in AOD converting process described anti- Shake the adjustment of the ingredient lower limit target of main alloy element C, Cr, Ni, Mn, Si of the high tough stainless structural steel of fire resisting；
S2, the molten steel to blow of AOD in S1 is transferred to LF furnace, and make the carbon content of molten steel into LF furnace, phosphorus content into Enter ultimate constituent lower limit hereinafter, preventing later period carburetting, reserves finishing operations and increase C and increase P surplus；
S3, the reduction refining slag that 270mm thickness is added to LF furnace carry out reduction refining to the molten steel for entering LF furnace, so as to Deoxidation and desulfurization and progress ingredient accurately adjust；
S4, LF furnace Argon gas agitating, the degree of LF furnace Argon gas agitating reach the top of the slag and blow brokenly；Then add by steel per ton Aluminium is added in the mode for entering Al 1.0kg, and molten steel does not add aluminium deoxidation in subsequent process；It can be in LF when promoting white slag formation Aluminum shot is added in slag surface, but not handy aluminium powder substitution, prevents the vigorous combustion of aluminium powder；
S5, LF furnace Argon gas agitating start to keep white slag after ten minutes, and when clinker is excessively dilute, high ca proportion lime stone tune is added Slag enables the refining of LF furnace to go on smoothly with adjusting component to keep the foaminess of clinker；
After S6, refining, denaturation treatment is carried out to the field trash in molten steel by alkali metal core-spun yarn, so that molten steel Ingredient meets the basis of the high tough stainless structural steel of the antidetonation fire resisting；
The molten steel that refining terminates to obtain in S7, S6 send continuous casting machine casting rectangular base；
The inspection running repair after supercooling of S8, rectangular bloom is ground, and carries out the rolling mill practice and heat of controlled rolling and controlled cooling in milling train later The required high tough stainless structural steel of antidetonation fire resisting is made in processing；
The rolling mill practice of controlled rolling and controlled cooling and heat treatment include that controlled rolling and controlled cooling rolling end temperature is controlled at 930 DEG C, are sprayed cold But it to 710 DEG C, directly sends stove back to, carries out nanoprecipitation and processing is mutually precipitated；The steel plate that can be crimped can be sent in 705 DEG C of curlings Tempering furnace carries out nanoprecipitation and processing is mutually precipitated.
Wherein, the reduction refining slag in S3 should be by basicity CaO/SiO2Control in the range of 2-3, reduction refining slag at Divide is CaO:60% by mass percentage, wherein high-quality CaCO3Middle CaO content total amount is than 58%；SiO2: 25%；CaF2: 10%；Remaining alumina firebrick block material.
The lumpiness 16mm of reduction refining slag cannot have powder-material, and need packed with sealed damp-proof bag.
Wherein, the refining in the preparation method makes field trash and oxygen sulfur content in steel reach high-purity level, total oxygen Content is less than 35ppm, and sulfur content is less than 50ppm.
Wherein, in S5 LF furnace refining with adjusting component consumed by the time 35 minutes.
Wherein, in S8 carry out nanoprecipitation be mutually precipitated processing after 700 DEG C come out and cool down, section bar can with strong wind cooling, heat Roll bending cannot be put using immersion cooling in 200 DEG C of thermal reactors；
The Yuanping City Zhong Hou plate in S8, which soaks, to be cooled down, and cannot be stacked in 200 DEG C or more thermo-contact property.
Example IV:
A kind of high tough stainless structural steel of antidetonation fire resisting, the basis of the high tough stainless structural steel of the antidetonation fire resisting are pressed Mass percent is calculated as: C 0.13%, Si 0.5%, Mn 0.5%, Cr 16.0%, Ni 1.8%, Mo 0.40%, V 0.18%, full Al 0.019%, P 0.030%, S 0.010%, full O 30ppm, remaining is Fe and inevitable impurity.
Wherein, the average grain size of the high tough stainless structural steel of the antidetonation fire resisting is 7 microns, chromium carbon nanometer precipitated phase Average-size is 270 nanometers.
Wherein, the refractory temperature of the high tough stainless structural steel of the antidetonation fire resisting is 600 DEG C, under 600 DEG C of refractory temperatures Fire endurance include 1 hour fire endurance, 2 hours fire endurances and 3 hours fire endurances；
Wherein: using 1 hour fire endurance in 1 hour fire resistance rating below, the fire resistance rating use below at 2 hours 2 hours fire endurances use 3 hours fire endurances in 3 hours fire resistance ratings below；Or 1 hour or less, 2 hours or less, 3 hours fire resistance ratings below all use 3 hours fire endurances.
Wherein, in 1 hour fire endurance of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >= 700MPa, breaking strength Rm >=875MPa, elongation percentage >=18%, 20 DEG C of impact absorbing energy >=40J of room temperature, -40 DEG C of impact absorbings Function >=40J；
In 2 hours fire endurances of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >=600MPa, Breaking strength Rm >=750MPa, elongation percentage >=18%, room temperature 20 DEG C of impact absorbing energy >=40J, -40 DEG C of impact absorbing energy >=40J；
In 3 hours fire endurances of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >=500MPa, Breaking strength Rm >=625MPa, elongation percentage >=18%, room temperature 20 DEG C of impact absorbing energy >=40J, -40 DEG C of impact absorbing energy >=40J.
Wherein, yield tensile ratio≤0.8 of the high tough stainless structural steel of the antidetonation fire resisting, requires, according to corrosion-resistant condition Antidetonation, fire resisting and resistance to are selected while met within the scope of the 12%Cr of atmospheric corrosion resistance to the 22%Cr for meeting marine corrosion requirement The tough structural steel of height that corrosion requires at being grouped as.
A kind of preparation method of the high tough stainless structural steel of the antidetonation fire resisting, the preparation method comprises the following steps:
S1, raw material are low nickel lateritic nickel ore surface layer mine, are smelted by blast furnace process or ore-smelting electric furnace into molten iron, AOD is sent to blow Refining；Or send AOD to blow by the molten iron that induction furnace, the low ferronickel block of electric arc furnace smelting obtain, it is completed in AOD converting process described anti- Shake the adjustment of the ingredient lower limit target of main alloy element C, Cr, Ni, Mn, Si of the high tough stainless structural steel of fire resisting；
S2, the molten steel to blow of AOD in S1 is transferred to LF furnace, and make the carbon content of molten steel into LF furnace, phosphorus content into Enter ultimate constituent lower limit hereinafter, preventing later period carburetting, reserves finishing operations and increase C and increase P surplus；
S3, the reduction refining slag that 300mm thickness is added to LF furnace carry out reduction refining to the molten steel for entering LF furnace, so as to Deoxidation and desulfurization and progress ingredient accurately adjust；
S4, LF furnace Argon gas agitating, the degree of LF furnace Argon gas agitating reach the top of the slag and blow brokenly；Then add by steel per ton Aluminium is added in the mode for entering Al 0.9kg, and molten steel does not add aluminium deoxidation in subsequent process；It can be in LF when promoting white slag formation Aluminum shot is added in slag surface, but not handy aluminium powder substitution, prevents the vigorous combustion of aluminium powder；
S5, LF furnace Argon gas agitating start to keep white slag after ten minutes, and when clinker is excessively dilute, high ca proportion lime stone tune is added Slag enables the refining of LF furnace to go on smoothly with adjusting component to keep the foaminess of clinker；
After S6, refining, denaturation treatment is carried out to the field trash in molten steel by alkali metal core-spun yarn, so that molten steel Ingredient meets the basis of the high tough stainless structural steel of the antidetonation fire resisting；
The molten steel that refining terminates to obtain in S7, S6 send continuous casting machine casting at 1250x200mm slab；
The inspection running repair after supercooling of S8, slab is ground, and carries out the rolling mill practice and Re Chu of controlled rolling and controlled cooling in milling train later The roll bending of the required high tough stainless structural steel 10mm thickness of antidetonation fire resisting is made in reason；
The rolling mill practice of controlled rolling and controlled cooling and heat treatment include that controlled rolling and controlled cooling rolling end temperature is controlled at 920 DEG C, are sprayed cold But to 710 DEG C, hot rolling plate send walking-beam kiln tempering furnace in 700 DEG C of curlings, carries out nanoprecipitation and processing is mutually precipitated.
Wherein, the reduction refining slag in S3 should be by basicity CaO/SiO2Control in the range of 2.5, reduction refining slag at Divide is CaO:52% by mass percentage, wherein high-quality CaCO3Middle CaO content total amount is than 60%；SiO2: 27%；CaF2: 10%；Remaining alumina firebrick block material.
The lumpiness 16mm of reduction refining slag cannot have powder-material, and need packed with sealed damp-proof bag.
Wherein, the refining in the preparation method makes field trash and oxygen sulfur content in steel reach high-purity level, total oxygen Content is less than 35ppm, and sulfur content is less than 50ppm.
Wherein, the LF furnace refining in S5 and time consumed by adjusting component are 32 minutes.
Wherein, in S8 carry out nanoprecipitation be mutually precipitated processing after 700 DEG C come out and cool down, hot rolling plate using immersion cooling, no It can be put in 200 DEG C of thermal reactors；
Hot rolling after cooling can send subsequent alignment cutting to examine acid wash passivation, obtain 10x1250mm hot rolling opening plate, and It delivers goods according to inspection result.
To sum up, the invention proposes one kind to combine antidetonation, fire resisting, corrosion-resistant, high-yield strength, high-elongation Can be in the high tough stainless structural steel of antidetonation fire resisting of one, average grain size is 5-10 microns, and chromium carbon nanometer precipitated phase is flat Having a size of 200-400 nanometers；Subsequent smelting process control total oxygen content is less than 35ppm, and sulfur content is less than 50ppm；And lead to Controlled rolling and controlled cooling and heat treatment are crossed, solid solution therein controls so that average grain size and chromium carbon nanometer precipitated phase are averaged ruler with precipitation It is very little to reach required specification, to ensure that the anti-seismic performance under the conditions of meeting high intensity, fire resistance, corrosion resistance.This hair Bright stainless steel uses nanometer precipitated phase metallurgical technology, and the lower limit value of yield strength is 600MPa, has antidetonation and fire prevention is used On the way.The steel anti-chlorine ion and atmospheric corrosion performance can be suitable with 304,316 stainless steels, it may have preferable pitting corrosion and crystalline substance Between corrosive power, can be not only used for construction long-life type building and bridge, it is also possible to make marine engineering construction steel.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications It should be regarded as protection scope of the present invention.

Claims (10)

1. a kind of high tough stainless structural steel of antidetonation fire resisting, which is characterized in that the high tough stainless structural steel of the antidetonation fire resisting Basis is by mass percentage are as follows: C 0.08-0.18%, Si≤0.8%, Mn≤0.8%, Cr 12.0-22.0%, Ni 1.5-2.0%, Mo 0.40-0.60%, V 0.15-0.25%, full Al 0.015-0.025%, P≤0.040%, S≤ 0.020%, full O≤35ppm, remaining is Fe and inevitable impurity.
2. the high tough stainless structural steel of antidetonation fire resisting according to claim 1, which is characterized in that the antidetonation fire resisting height is tough The average grain size of stainless structural steel is 5-10 microns, and chromium carbon nanometer precipitated phase average-size is 200-400 nanometers.
3. the high tough stainless structural steel of antidetonation fire resisting according to claim 1, which is characterized in that the antidetonation fire resisting height is tough The refractory temperature of stainless structural steel is 600 DEG C, and fire endurance under 600 DEG C of refractory temperatures includes 1 hour fire endurance, 2 small When fire endurance and 3 hours fire endurances；
Wherein: 1 hour fire endurance is used in 1 hour fire resistance rating below, it is small using 2 in 2 hours fire resistance ratings below When fire endurance, use 3 hours fire endurances in 3 hours fire resistance ratings below；Or 1 hour or less, 2 hours or less, it is 3 small When fire resistance rating below all use 3 hours fire endurances.
4. the high tough stainless structural steel of antidetonation fire resisting according to claim 3, which is characterized in that the antidetonation fire resisting height is tough In 1 hour fire endurance of stainless structural steel, yield strength Rp0.2 >=700MPa, breaking strength Rm >=875MPa, elongation percentage >= 18%, room temperature 20 DEG C of impact absorbing energy >=40J, -40 DEG C of impact absorbing energy >=40J；
In 2 hours fire endurances of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >=600MPa, fracture Intensity Rm >=750MPa, elongation percentage >=18%, room temperature 20 DEG C of impact absorbing energy >=40J, -40 DEG C of impact absorbing energy >=40J；
In 3 hours fire endurances of the high tough stainless structural steel of the antidetonation fire resisting, yield strength Rp0.2 >=500MPa, fracture Intensity Rm >=625MPa, elongation percentage >=18%, room temperature 20 DEG C of impact absorbing energy >=40J, -40 DEG C of impact absorbing energy >=40J.
5. the high tough stainless structural steel of antidetonation fire resisting according to claim 1, which is characterized in that the antidetonation fire resisting height is tough Yield tensile ratio≤0.8 of stainless structural steel is required according to corrosion-resistant condition, in the 12%Cr of atmospheric corrosion resistance to meeting marine corrosion It is required that 22%Cr within the scope of select while meeting antidetonation, fire resisting and corrosion-resistant requirement the tough structural steel of height at grouping At.
6. a kind of preparation method of the high tough stainless structural steel of antidetonation fire resisting described in claim 1, which is characterized in that the preparation Method the following steps are included:
S1, raw material are low nickel lateritic nickel ore surface layer mine, are smelted by blast furnace process or ore-smelting electric furnace into molten iron, AOD is sent to blow；Or Person send AOD to blow by the molten iron that induction furnace, the low ferronickel block of electric arc furnace smelting obtain, and it is resistance to that the antidetonation is completed in AOD converting process The adjustment of the ingredient lower limit target of main alloy element C, Cr, Ni, Mn, Si of fiery high tough stainless structural steel；
S2, the molten steel to blow of AOD in S1 is transferred to LF furnace, and the carbon content into the molten steel of LF furnace, phosphorus content is entered most Whole ingredient lower limit is hereinafter, preventing later period carburetting, reserving finishing operations increasing C and increasing P surplus；
S3, the reduction refining slag that 200-300mm thickness is added to LF furnace carry out reduction refining to the molten steel for entering LF furnace, so as to Deoxidation and desulfurization and progress ingredient accurately adjust；
S4, LF furnace Argon gas agitating, the degree of LF furnace Argon gas agitating reach the top of the slag and blow brokenly；Then Al is added by steel per ton Aluminium is added in the mode of 0.8-1.2kg, and molten steel does not add aluminium deoxidation in subsequent process；It can be in LF furnace when promoting white slag formation Aluminum shot is added in slag surface, but not handy aluminium powder substitution, prevents the vigorous combustion of aluminium powder；
S5, LF furnace Argon gas agitating start to keep white slag after ten minutes, and when clinker is excessively dilute, high ca proportion lime stone residue adjustment is added, To keep the foaminess of clinker, the refining of LF furnace is gone on smoothly with adjusting component；
After S6, refining, denaturation treatment is carried out to the field trash in molten steel by alkali metal core-spun yarn, so that the ingredient of molten steel Meet the basis of the high tough stainless structural steel of the antidetonation fire resisting；
The molten steel that refining terminates to obtain in S7, S6 send continuous casting machine casting at slab or square billet or rectangular bloom；
S8, slab or square billet or rectangular bloom inspection running repair after supercooling are ground, and carry out the rolling of controlled rolling and controlled cooling in milling train later The required high tough stainless structural steel of antidetonation fire resisting is made in technique and heat treatment；
The rolling mill practice of controlled rolling and controlled cooling and heat treatment include that controlled rolling and controlled cooling rolling end temperature is controlled at 910-950 DEG C, are sprayed cold But it to 690-720 DEG C, directly sends stove back to, carries out nanoprecipitation and processing is mutually precipitated；The steel plate that can be crimped can be in 690-720 Stove is sent in DEG C curling back to, carries out nanoprecipitation and processing is mutually precipitated.
7. the preparation method of the high tough stainless structural steel of antidetonation fire resisting according to claim 6, which is characterized in that going back in S3 Former refining slag should be by basicity CaO/SiO2In the range of 2-3, the ingredient of reduction refining slag is by mass percentage for control CaO:50-60%, wherein high-quality CaCO3Middle CaO content total amount ratio > 50%；SiO2: 25-30%；CaF2: 10%；Its reinforcement Aluminium refractory brick block material；The lumpiness of reduction refining slag is less than 20mm, cannot have powder-material, and need packed with sealed damp-proof bag.
8. the preparation method of the high tough stainless structural steel of antidetonation fire resisting according to claim 6, which is characterized in that the preparation Refining in method makes field trash and oxygen sulfur content in steel reach high-purity level, and total oxygen content is less than 35ppm, and sulfur content is small In 50ppm.
9. the preparation method of the high tough stainless structural steel of antidetonation fire resisting according to claim 6, which is characterized in that the LF in S5 Furnace refining is generally no greater than 40 minutes with the time consumed by adjusting component.
10. the preparation method of the high tough stainless structural steel of antidetonation fire resisting according to claim 6, which is characterized in that in S8 into Row nanoprecipitation is mutually precipitated after processing and comes out and cools down for 700 DEG C, and section bar can be with strong wind cooling, and hot rolling plate is using immersion cooling, no It can be put in 200 DEG C of thermal reactors；
The Yuanping City Zhong Hou plate in S8, which soaks, to be cooled down, and cannot be stacked in 200 DEG C or more thermo-contact property.
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