CN108441779A - A kind of high intensity high-yield-ratio nuclear power station mechanical module steel and its manufacturing method - Google Patents

A kind of high intensity high-yield-ratio nuclear power station mechanical module steel and its manufacturing method Download PDF

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CN108441779A
CN108441779A CN201810154720.1A CN201810154720A CN108441779A CN 108441779 A CN108441779 A CN 108441779A CN 201810154720 A CN201810154720 A CN 201810154720A CN 108441779 A CN108441779 A CN 108441779A
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steel
steel plate
temperature
yield
nuclear power
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CN108441779B (en
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颜秉宇
孙殿东
王爽
胡海洋
刘翔
隋松言
欧阳鑫
段江涛
王勇
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Angang Steel Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/04Making ferrous alloys by melting
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron

Abstract

The present invention discloses a kind of high intensity high-yield-ratio nuclear power station mechanical module steel and its manufacturing method.Contain in steel, C:0.09%~0.12%, Si:0.30%~0.40%, Mn:0.50%~0.70%, P≤0.010%, S≤0.002%, Cr:0.60%~0.90%, Ni:0.30%~0.50%, Mo:0.26%~0.45%, V:0.005%~0.030%, B:0.001%~0.005%, Ti≤0.015%, Al:0.010%~0.025%, remaining is Fe and inevitable impurity;1565~1575 DEG C of vacuum outgas;1200~1250 DEG C of billet heating temperature, 1100~1150 DEG C of start rolling temperature, finishing temperature >=1000 DEG C, total deformation >=60%, 900~920 DEG C of hardening heat, 2~3.5min/mm of soaking time;625~660 DEG C of temperature, 4~6min/mm of soaking time.20~110mm of steel plate thickness, tensile strength >=700MPa, yield tensile ratio >=0.9.

Description

A kind of high intensity high-yield-ratio nuclear power station mechanical module steel and its manufacturing method
Technical field
The invention belongs to ferrous material fields, more particularly to nuclear power station mechanical module steel and its manufacturing method.
Background technology
Module refers to a sub-assembly assembled by material and component.Module is single as a whole after shop-fabricated Member, construction that is convenient and accelerating scene.To its prefabricated and assembling before module is in place, avoid in the narrow of its final position Space carries out excessive work, allows for installation and civil engineering concurrent job in this way.
China is building nuclear power station based on three generations's nuclear power at present, and system complex, construction period are long, construction quality requires Height, under the premise of ensureing quality, it is one of the target that nuclear power owner pursues that how to shorten the construction period, which reduces project cost, and tradition is applied The Combination Welding work of work pattern, a large amount of valves and pipeline in nuclear island factory building carries out at the scene, need to put into more welder, and Long construction period improves installation effectiveness to reduce nuclear island on-site installation work amount, and foreign boiling water reactor of nuclear power plant implements pipeline The successful experience of root module technology has carried out system research to nuclear power station pipeline root module construction technology, has formulated pipeline The selected principle and design cycle of root module develop the duct section module design function based on three dimensional design platform, it is proposed that The technical conditions for implementing pipeline root module, reference is provided for nuclear power station application module construction technology.
External boiling water reactor of nuclear power plant starts gradually to use modular construction technology, and take with the development of application technology Good engineering effort was obtained, with the accumulation of the increasingly mature and application experience of modular technology, boiling water reactor of nuclear power plant uses The range that modularized design is built is more and more wider, and the module of design is also increasing, and the distinguishing feature of nuclear power mechanical module is exactly Steel itself have preferable weldability and mouldability, need to there is apparent strict demand, finished steel to Design of Chemical Composition in this way Plate needs preferable fatigue performance and low-temperature flexibility, and mechanical module is mostly in the application reciprocation cycle formula with steel, and is usually located In low frequency high-stress state, so certain high-yield-ratio is conducive to the comprehensive performance of material.At present both at home and abroad to midium-carbon steel More patent is formed:
Application No. is 201310083274.7, it is entitled " a kind of nuclear power station mechanical module support element high strength steel plate and its Manufacturing method ", the patent relate generally to a kind of production method of nuclear power station module support element steel plate, and ingredient includes:C: 0.08%~0.22%;Si:0.15%~0.45%;Mn:0.60%~1.10%;P≤0.020%;S≤0.015%;Ni: 0.60%~1.00%;Cr:0.40%~0.70%;Cu:0.15%~0.55%;Mo:0.40%~0.60%;V: 0.020%~0.080%;Ti:0.008%~0.030%;B:0.0005%~0.005%;Al:0.020%~0.050%, Surplus is iron and impurity.The patent is properly added alloying element in low carbon content design basis, and the tensile strength of steel is made to reach 800MPa or more.The steel plate thickness of the patent is 6~65mm, and the thickness of steel plate is relatively low, and nuclear power machinery mould can not be completely covered The thickness range of block, while the heat-treatment temperature range of the patent is very big, in this temperature range, can cause the tissue of steel plate It is unstable.
Application No. is 201110117614.4, entitled " tensile strength is more than 690MPa grades of nuclear vessel steel and producer Method ", the patent essentially disclose a kind of production method of nuclear vessel steel plate, and chemical element mass percentage is:C≤ 0.08%, Si:0.15%~0.50%, Mn:1.30%~1.60%, Alt:0.01%~0.05%, Ni:0.42%~ 0.70%, Mo:0.32%~0.60%, Cr:0.10%~0.30%, Ti:0.01%~0.04%, control P≤0.008%, S ≤ 0.005%, N≤0.005%, Cu≤0.03%, V≤0.007%, Sn≤0.005%, Sb≤0.005%, As≤ 0.010%, Pb≤0.005%, remaining is Fe and inevitable impurity.Steel plate yield strength >=570MPa of the invention resists Tensile strength:690~860MPa, -20 DEG C of impact >=100J.The chemical composition of the invention requires the elements such as P, S, N, Cu very tight Lattice, the larger and requirement to raw material of smelting difficulty is more stringent, the raising cost of meeting by a relatively large margin, under the chemical composition Carbon equivalent it is higher, influence the weldability of steel plate, while there is no consider the steel plate Simulated post-weld heat treatment time pair in the invention The influence of mechanical property.
It is entitled " a kind of modulation processing method of thick steel plates for pressure container " application No. is 201010154420.7, The patent essentially discloses a kind of nuclear power thick steel plates hardening and tempering method, it include the steps that it is following successively:Ι is quenched: Steel plate is heated to 920~930 DEG C, keeps the temperature 45~55 minutes, then carry out quenching treatment;II temper:By quenched steel Plate is heated to 630~650 DEG C, keeps the temperature 40~50 minutes, takes out steel plate and is cooled to room temperature;III secondary quenching:By heating steel sheet plus Heat keeps the temperature 50~60 minutes, steel plate is carried out quenching treatment to 920 DEG C~930 DEG C;IV double tempering:After secondary quenching Steel plate is in chamber furnace, it is desirable that temperature control fluctuation is not more than ± 5 DEG C, is heated to 615~625 DEG C, keeps the temperature 40~50 minutes, take Go out to naturally cool to room temperature.The tensile strength Rm of steel plate is increased to by 630MPa using modifier treatment twice in the patent, is extended Rate A is increased to 20%~23%, it is secondary it is quenched the performance of steel plate is influenced little, and repeatedly heat treatment can be to surface of steel plate matter Amount is affected, and can cause steel plate thickness that cannot meet tolerance conditions, while the heat-treatment temperature range is too low, can only be directed to spy Determine steel plate thickness implementation.
Invention content
The present invention provides a kind of high intensity high-yield-ratio core machinery power station module steel and its manufacturing methods, pass through chemistry The design of ingredient, rolling mill practice and heat treatment process makes intensity, toughness and the spy of the steel plate condition of delivery and Simulated post-weld heat treatment Hinder performance and obtain good matching, performance indicator disclosure satisfy that technical indicator, be fully able to meet three generations's pressurized-water reactor nuclear power plant The requirement of module steel.
Specifically technical solution is:
A kind of high intensity high-yield-ratio nuclear power station mechanical module steel, chemical composition are by mass percentage:C: 0.09%~0.12%, Si:0.30%~0.40%, Mn:0.50%~0.70%, P≤0.010%, S≤0.002%, Cr: 0.60%~0.90%, Ni:0.30%~0.50%, Mo:0.26%~0.45%, V:0.005%~0.030%, B: 0.001%~0.005%, Ti≤0.015%, Al:0.010%~0.025%, remaining content be Fe and inevitably it is miscellaneous Matter.
It is as follows using mentioned component design reason:
C:It is main intensified element in steel, the intensity and quenching degree of steel can be effectively improved, but also reduces steel simultaneously Plasticity, toughness and weldability, C content is relatively low to cause the intensity of steel plate insufficient, and C content is excessively high, and brittle transition temperature is apparent It increasing, weld seam fire check sensibility also greatly improves, and welding performance is poor, under the premise of ensureing intensity needed for steel plate and toughness, It is 0.09%~0.12% the present invention claims C content.
Si:It is one of intensified element in steel, deoxidation and solution strengthening can be played the role of, element silicon diffusion is slow, Silicate inclusion object is also easy to produce in steel, thus Si contents be not easy it is excessively high, the present invention by Si control be 0.30%~0.40%.
Mn:In steel can by way of solution strengthening reinforced ferrite, the tough of steel can be improved in quenched and tempered steel Property and quenching degree, therefore, the present invention by steel Mn contents control 0.50%~0.70%.
P、S:It is the harmful element in steel, the impact flexibility of steel can be reduced, easily aggravation is centrally formed segregation and loose wait lacks It falls into, while radiation embrittlement can be caused, therefore it is required that the lower P, S content the better, but consider that production cost, the present invention design P and contain It is≤0.002% that amount, which is≤0.010%, S contents,.
Cr:The antioxidation of steel can be significantly improved in steel, increase resistance to corrosion.Austenite phase field is reduced simultaneously, Improve quenching degree, intensity and the hardness of steel.But Cr too high levels can increase the postwelding crack sensitivity of steel, therefore the present invention wants It is 0.60%~0.90% to ask Cr contents control in steel.
Ni:The low-temperature flexibility of steel can be obviously improved, while improving the low-temperature flexibility of thick section steel plate, make steel plate with Can also have higher toughness while sufficient intensity, meet the requirement of index, therefore from actual needs, the present invention is by Ni Content control is 0.30%~0.50%.
Mo:The quenching degree and heat resistance that steel can mainly be improved, prevent steel belt roof bolt brittleness, can be improved in quenched and tempered steel Steel belt roof bolt stability improves plasticity, therefore the present invention controls Mo contents to more effectively reduce residual stress 0.26%~0.45%.
V:The intensity and yield tensile ratio of steel are mainly improved in quenched and tempered steel, crystal grain thinning improves the effect of obdurability, but vanadium There is stronger affinity with carbon and oxygen, quenching degree can be influenced in the presence of with carbide form, therefore V will be added in the present invention in steel Scope control be 0.005%~0.030%.
B:The quenching degree that steel can be properly increased in steel, to save other more expensive metals, therefore the present invention is by the model of B It contains and is made as 0.001%~0.005%.
Ti:Plasticity and toughness can be improved in ordinary low-alloy steel, since titanium secures nitrogen and sulphur formation titanium carbide, carried The intensity of Gao Gang, thus in the present invention by the scope control of Ti≤0.015%.
Al:Nitrogen agent is determined in deoxidation when being mainly used for steel-making in steel, and can with crystal grain thinning, suppress mild steel when Effect, improves the low-temperature flexibility of steel, while Al content should not be excessive, in order to avoid generate Al2O3It is mingled with.The present invention is by Al content control in steel It is made as 0.010%~0.025%.
The manufacturing method of high intensity high-yield-ratio nuclear power station mechanical module steel includes:Converter smelting-vacuum processing-company Casting-rolling-Tempering and Quenching.
In terms of smelting:It is produced using converter smelting, external refining, vacuum processing and continuous casting process;Molten steel is completed to turn Stove carries out external refining after smelting, and vacuum outgas is carried out when liquid steel temperature reaches 1565~1575 DEG C, enters after completing degassing Continuous casting is casting continuously to form steel billet.
Rolling mill practice:1200~1250 DEG C of billet heating temperature, start rolling temperature:1100~1150 DEG C, finishing temperature >= 1000℃.Total deformation >=60%, 3 pass deformation >=15% of arbitrary continuation;
Tempering and Quenching:Steel plate carries out stacking slow cooling after rolling, and modifier treatment is carried out to steel plate after slow cooling.
Quenching treatment:900~920 DEG C, 2~3.5min/mm of soaking time, reach the complete austenitizing temperature of steel plate, Fully heat preservation, after coming out of the stove immediately water cooling until steel billet temperature is to 100 DEG C or less.
Temper:It 625~660 DEG C, 4~6min/mm of soaking time, fully keeps the temperature, ensures in steel in the temperature range Carbide Precipitation, and form high tempering Soxhlet body tissue.
The tensile strength of steel plate reaches 700MPa or more, and yield tensile ratio is not less than 0.9.
Advantageous effect:
The present invention provides a kind of high intensity high-yield-ratio nuclear power station mechanical module steel and its manufacturing method, the steel of production Plate thickness is 20~110mm, and width and length can be produced according to actual demand.Compared with prior art, advantageous effect is such as Under:
(1) steel grade of the present invention is conditioned with after Simulated post-weld heat treatment, and preferable obdurability water is all had under two states It is flat.Yield strength and tensile strength are respectively 739MPa and 799MPa after the conditioned processing of 90mm steel plates;Simulated post-weld heat treatment Afterwards, yield strength and tensile strength are respectively 671MPa and 732MPa;Under modifier treatment and Simulated post-weld heat treatment two states Yield tensile ratio be 0.92, -20 DEG C of ballistic work >=132J, from the results of view, the matching of steel plate obdurability are preferable, yield tensile ratio intensity compared with It is high.
(2) 350 DEG C high temperature tensile properties of the steel grade of the present invention under different conditions are equally maintained at higher level.90mm The yield strength and tensile strength of 350 DEG C of drawing by high temperature are respectively 607MPa and 702MPa after the conditioned processing of steel plate;Yield tensile ratio It is 0.86.
(3) flaw detection of steel plate requires to be fully able to meet I grade of acceptance criteria in NB/T 47013.
Description of the drawings
Fig. 1 is the metallographic structure of embodiment 1;It is organized as tempered sorbite.
Specific implementation mode
For following embodiment for illustrating the content of present invention, these embodiments are only the general description of the content of present invention, The content of present invention is not limited.
The production method of the present embodiment, molten steel pass through converter smelting, LF+VD external refinings, vacuum processing and cast, rolling Finished steel plate specification is 20~110mm.Simulated post-weld heat treatment technique is 610 DEG C of temperature, and soaking time 12h, 425 DEG C to rise Rate of temperature fall≤55 DEG C/h.Table 1 is embodiment steel smelting chemical composition;Table 2 is the rolling mill practice of embodiment steel plate;Table 3 is real Apply the heat treatment process of a steel plate;Table 4 is the tensile property of embodiment steel plate.Table 5 is the impact property of embodiment steel plate.
1 each embodiment steel smelting chemical composition (wt%) of table
Embodiment C Si Mn P S Cr Ni Mo V B Ti Al
1 0.09 0.31 0.50 0.005 0.0015 0.60 0.30 0.26 0.005 0.001 0.007 0.015
2 0.10 0.37 0.60 0.008 0.0010 0.67 0.32 0.30 0.020 0.005 0.006 0.020
3 0.09 0.33 0.55 0.007 0.0017 0.79 0.38 0.37 0.017 0.004 0.021
4 0.11 0.39 0.65 0.006 0.0013 0.85 0.49 0.45 0.025 0.002 0.008 0.019
5 0.12 0.35 0.70 0.009 0.0009 0.90 0.50 0.42 0.029 0.003 0.015 0.022
2 each embodiment steel rolling technique of table
3 each embodiment steel modifier treatment technique of table
4 each embodiment steel plate stretching performance of table
5 each embodiment steel plate impact property of table
According to 20~110mm specification steel plates produced by the invention it can be seen from table, by modifier treatment and simulation postwelding Heat treatment, yield strength >=717MPa that quality adjustment condition room temperature stretches, tensile strength >=762MPa, yield tensile ratio >=0.92;Simulation Yield strength >=662MPa that post weld heat treatment state room temperature stretches, tensile strength >=709MPa, yield tensile ratio >=0.92;350℃ Yield strength >=603MPa of drawing by high temperature, tensile strength >=679MPa, yield tensile ratio >=0.80;- 20 DEG C of impacts of steel plate >= 123J, steel plate have good comprehensive mechanical property.

Claims (3)

1. a kind of high intensity high-yield-ratio nuclear power station mechanical module steel, which is characterized in that chemical composition presses quality percentage in steel Than for C:0.09%~0.12%, Si:0.30%~0.40%, Mn:0.50%~0.70%, P≤0.010%, S≤ 0.002%, Cr:0.60%~0.90%, Ni:0.30%~0.50%, Mo:0.26%~0.45%, V:0.005%~ 0.030%, B:0.001%~0.005%, Ti≤0.015%, Al:0.010%~0.025%, remaining is for Fe and unavoidably Impurity;The tensile strength of steel plate reaches 700MPa or more, and yield tensile ratio is not less than 0.9.
2. a kind of high intensity high-yield-ratio nuclear power station mechanical module steel as described in claim 1, which is characterized in that steel plate Thickness is 20~110mm.
3. a kind of preparation method of high intensity high-yield-ratio nuclear power station module bearing steel as claimed in claim 1 or 2, steel plate Production technology be:Converter smelting-vacuum processing-continuous casting-rolling-Tempering and Quenching, which is characterized in that
Molten steel carries out external refining after completing converter smelting, and vacuum outgas is carried out when liquid steel temperature reaches 1565~1575 DEG C, Enter continuous casting after completing degassing, is casting continuously to form steel billet;
Billet heating temperature is 1200~1250 DEG C, and start rolling temperature is 1100~1150 DEG C, finishing temperature >=1000 DEG C, total deformation Amount >=60%, 3 pass deformation >=15% of arbitrary continuation;Steel plate carries out stacking slow cooling after rolling, and is carried out to steel plate after slow cooling Modifier treatment;
Hardening heat be 900~920 DEG C, 2~3.5min/mm of soaking time, steel plate come out of the stove after immediately water cooling until steel billet temperature To 100 DEG C or less;Temperature is 625~660 DEG C, 4~6min/mm of soaking time.
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CN111270144A (en) * 2020-03-19 2020-06-12 鞍钢股份有限公司 High-strength steel plate for pressurized water reactor nuclear power station safety shell barrel and manufacturing method thereof
CN111270143A (en) * 2020-03-19 2020-06-12 鞍钢股份有限公司 Thick steel plate for nuclear power station containment equipment module and production method thereof
CN111363985A (en) * 2020-03-19 2020-07-03 鞍钢股份有限公司 Steel for supporting nuclear power station containment vessel and manufacturing method thereof
CN111607748A (en) * 2020-05-15 2020-09-01 江阴兴澄特种钢铁有限公司 High-flatness large-thickness lamellar tearing resistant 780CF-Z35 hydroelectric steel and manufacturing method thereof

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Publication number Priority date Publication date Assignee Title
CN111270144A (en) * 2020-03-19 2020-06-12 鞍钢股份有限公司 High-strength steel plate for pressurized water reactor nuclear power station safety shell barrel and manufacturing method thereof
CN111270143A (en) * 2020-03-19 2020-06-12 鞍钢股份有限公司 Thick steel plate for nuclear power station containment equipment module and production method thereof
CN111363985A (en) * 2020-03-19 2020-07-03 鞍钢股份有限公司 Steel for supporting nuclear power station containment vessel and manufacturing method thereof
CN111270143B (en) * 2020-03-19 2021-07-09 鞍钢股份有限公司 Thick steel plate for nuclear power station containment equipment module and production method thereof
CN111607748A (en) * 2020-05-15 2020-09-01 江阴兴澄特种钢铁有限公司 High-flatness large-thickness lamellar tearing resistant 780CF-Z35 hydroelectric steel and manufacturing method thereof

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