CN107988566A - A kind of 600MPa grades of core first device steel and its manufacture method - Google Patents

A kind of 600MPa grades of core first device steel and its manufacture method Download PDF

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Publication number
CN107988566A
CN107988566A CN201610952951.8A CN201610952951A CN107988566A CN 107988566 A CN107988566 A CN 107988566A CN 201610952951 A CN201610952951 A CN 201610952951A CN 107988566 A CN107988566 A CN 107988566A
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steel
steel plate
core
manufacture method
present
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王勇
李德刚
王爽
孙殿东
王永才
颜秉宇
胡海洋
梁福鸿
罗志华
李黎明
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Angang Steel Co Ltd
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Angang Steel Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • 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
    • C22C38/18—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
    • 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
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

It is as follows by weight percentage that the present invention provides a kind of 600MPa grades of core first device steel and its manufacture method, the component of the steel：C：0.10%~0.20%, Si：0.10%~0.40%, Mn：1.30%~1.60%, Mo：0.40%~0.60%, Ni：0.65%~0.85%, Cr：0.30%~0.45%, V：0.02%~0.05%, B：0.0005%~0.004%：P≤0.012%, S≤0.008%, [H]≤2.0ppm, [O]≤30ppm, surplus are Fe and inevitable impurity.Manufacture method：Billet heating temperature >=1100 DEG C, average rolling pass deflection >=10%；Heat treatment uses modifier treatment, and using strength character of the steel plate produced by the invention with stabilization, Strength Changes amplitude is smaller at steel plate thickness 1/4 and stablizes.

Description

A kind of 600MPa grades of core first device steel and its manufacture method
Technical field
The invention belongs to ferrous material field, more particularly to 600MPa grades of core first device steel and its manufacturer Method.
Background technology
Nuclear energy is increasingly paid attention to, safe utilization be subject to countries in the world as a kind of cleaning, the safe and stable energy Nuclear energy, greatly develop nuclear power and become a kind of trend.China has become at present is building the most country of nuclear power generating sets in the world, Nuclear power technology exporting country is used as at the same time, successively related protocol is signed with countries such as South Africa, Pakistan, Turkey, is built for it If advanced nuclear power generating sets.Wherein by China's autonomous Design, independent development, imperial No.1 HL1000, the CPR1000 core of China independently built In motor group, steam generation life device, safety injection tank etc. belong to core first device, due to needing with having radioactive high temperature, height The water of pressure is in contact, and application site is extremely crucial.Under normal conditions, steam generator, safety injection tank are by cylinder, end socket and skirt The equipments such as cylinder board form, and finished steel plate thickness is 30-120mm, and particularly with cylinder steel plate, steel plate substance is mostly at 30 tons More than, and, either modifier treatment (hereinafter referred to as QT), or Simulated post-weld heat treatment extremely stringent for performance requirement (hereinafter referred to as SPWHT) state, finished steel plate tensile strength are required in 600-700MPa (at thickness of slab 1/4), therefore for core For level-one steam generator, safety injection tank equipment steel, not only there is the difficulty in terms of big substance production, while also need to further The stability of different conditions lower steel plate performance is controlled, meets properties of product requirement.Therefore equipped from existing iron and steel enterprise both at home and abroad From the point of view of ability, there is larger difficulty.
The enterprise for producing such steel plate in the world at present is mainly France Industeel, and it is RCC-M M2125 to select steel grade 18MND5 as defined in standard, the mode of production are formed using large-scale steel ingot rolling.Two are primarily present from the point of view of its condition of production The problem of aspect：First, being produced by RCC-M M2125 standards, the alloying element content such as C and Ni, Mo in steel controls endless Rationally, although can obtain tempered sorbite tissue after modifier treatment, through a long time Simulated post-weld heat treatment again, can analyse in steel Go out a large amount of alloy carbides, so as to cause intensity and toughness to decline, it is difficult to meet the requirements.Under normal conditions, such steel grade can only Meet 10 it is small when or so SPWHT, and be difficult to meet SPWHT requirements when 16-16.5 is small required in actual production；Two It is high temperature tensile properties.Produced by RCC-M M2125 standards, be only capable of meeting tensile strength (Rm) under 350 DEG C of hot conditions >=540MPa, yield strength (RP0.2The requirement of) >=380MPa.And from the point of view of the practical application temperature such as safety injection tank, ring of being on active service substantially Border is at 150 DEG C or so, therefore it is required that tensile strength (Rm) >=600MPa, yield strength (R under 150 DEG C of hot conditionsP0.2)≥ 403MPa, i.e. tensile strength and being consistent under normal temperature state, this is that current 18MND5 can not be realized.
Midium-carbon steel has been disclosed both at home and abroad more patent application and document at present, it is main as follows：
(1) invent《Thick steel plate for nuclear power plant containment and its manufacture method》(application number：201210269122.1), it is open A kind of Thick steel plate for nuclear power plant containment, its thickness are 10-60mm, its chemical composition is:C:0.06-0.15%；Si: 0.10-0.40%；Mn:1.0-1.5%；Mo:0.10-0.30%；P≤0.012%；S≤0.003%；Al:0.015-0.050； Ni:0.20-0.50%；And V≤0.05%, Ti≤0.03%, Cr≤0.25, Nb≤0.03%, Ca:0.0005-0.005% At least one of；Surplus is Fe and other inevitable impurity.The Thick steel plate for nuclear power plant containment related generally to has High intensity, high tenacity, and mother metal and heat affected area all have good impact flexibility at low temperatures, are suitably applied core Power plant safety shell manufacturing field.
(2) invent《A kind of generation Ⅲ nuclear power station containment vessel steel plate and its manufacture method》(application number： 201210282831.3) a kind of generation Ⅲ nuclear power station containment vessel steel plate and its manufacture method, its component, are related generally to Scope is：C:0.08-0.12%；Si:0.15-0.55%；Mn:0.9-1.5%；P≤0.007%；S≤0.004%；Ni: 0.1-0.5%；Cr:0.0-0.3%；Mo:0.10-0.35%；V:0.010-0.050%；Nb:0.010-0.030%；Ti: 0.008-0.035%；Al:0.020-0.050%；N≤0.006%；Nb+V≤0.08%, surplus for iron and inevitably it is miscellaneous Matter.Steel plate produced by the present invention, tensile strength reach more than 600MPa, resistance to 200 DEG C of high-temperature behaviors, of low cost, welding performance It is excellent.
Above-mentioned two are invented the construction for all referring to nuclear reactor safety shell, and the hardening heat of invention is 800-1000 DEG C, when The tissue of steel plate produces certain destruction when hardening heat reaches 1000 DEG C.
(3) invent《A kind of Clad steel plate for nuclear power engineering and manufacturing method of clad steel plate and preparation method thereof》(application number：201210349026.8), it is main It is related to a kind of Clad steel plate for nuclear power engineering and manufacturing method of clad steel plate, comprising substrate and compound plate, substrate is killed steel steel plate, and compound plate is chromium-nickel austenite Stainless-steel sheet.Substrate component is：C≤0.025%；Si:0.10-0.50%；Mn:1.00-1.80%；P≤0.015%；S≤ 0.015%；Ni:0.30-0.80%；Cr≤0.25%；Mo:0.35-0.70%；Cu≤0.12%；V≤0.06%；Nb≤ 0.02%；Ti≤0.03%；Co≤0.25%；Al >=0.02%, surplus are iron and inevitable impurity.The patent is except open Outside steel plate chemical composition, emphasis discloses the preparation method of clad steel plate, right although refer to the component of substrate and compound plate It is not described in how steel plate produces.
(4) invent《A kind of nuclear plant pressure vessels and equipment gate steel plate and its manufacture method》(application number： 201310076884.4), relate generally to a kind of nuclear plant pressure vessels and equipment gate steel plate, steel plate component：C:0.10- 0.20%；Si:0.15-0.35%；Mn:1.00-1.65%；P≤0.015%；S≤0.005%；Ni:0.50-0.85%；Cr ≤ 0.15%；Cu≤0.06%；Mo≤0.05%；V≤0.020%；Nb≤0.040%；Ti≤0.020%；Al:0.020- 0.050%；N≤0.015%；As≤0.015%；Sn≤0.010%, surplus are iron and inevitable impurity.Patent master Disclose and converter smelting is used under the conditions of existing equipment, realize the production of clean steel.Plate Production cost is low at the same time, tool There are stable structure property, low-temperature flexibility and high-temperature behavior, welding performance, cold and hot working function admirable, its ductile-brittle transition temperature TNDT≤-28℃.The heat treatment process of the invention is normalizing or quenching+tempering, and on the one hand the hardening heat of the invention is higher, no Beneficial to the performance of steel plate；On the other hand the invention does not disclose the performance of quenching+tempering heat-treated steel plate.
(5) invent《A kind of Steel plate with super-large thickness for nuclear power engineering equipment》(201210309621.9), it is main It is related to a kind of Steel plate with super-large thickness for nuclear power engineering equipment, belongs to technical field of steel production.Chemical composition Including：C≤0.020%；Si:0.10-0.30%；Mn:1.15-1.60%；P≤0.012%；S≤0.010%；Ni:0.50- 0.80%；Cr≤0.20%；Mo:0.45-0.55%；Cu≤0.18%；V≤0.01%；Nb≤0.02%；Ti≤0.03%； AlAlways>=0.020%；Cu+6Sn≤0.33%, surplus are iron and inevitable impurity.The invention is mainly used in nuclear power station steaming The manufacture of the key equipments such as device, high pressure cover end and pressure vessel is sent out, but -20 DEG C of ballistic works of steel plate that the invention produces are about 180J, of the invention -20 DEG C of ballistic works are averaged 210J, and contrast invention and Simulated post-weld heat treatment performance is not required.
(6) invent《A kind of nuclear power station mechanical module supporting item high strength steel plate and its manufacture method》(application number： 201310083274.7) a kind of nuclear power station module supporting item steel plate, is related generally to, component 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 are iron and impurity.The patent is appropriate in low carbon content design basis Alloying element is added, the tensile strength of steel is reached more than 800MPa.Compared with this patent, its purposes, composition design, production work Skill and performance requirement etc. have difference, and such high intensity is also unsuitable for the manufacture of safety injection tank substrate.
Document " tissue and mechanical property of nuclear pressure container steel plate SA533B,《Material heat treatment journal》, Volume 2012,33, the 8th phase " reports a kind of 620MPa grades of nuclear pressure container steel, in its chemical composition and is not added with chemistry Element Cr, can not meet the requirement of U.S. norm ASME-SA533, so there are essential distinction for two steel grades.
Document " nuclear power pressure vessel forging 16MND5 Heat-Treatment of Steel techniques,《Steel research journal》, the 2012, the 21st Volume, the 1st phase " reports the method using forging technology production 16MND5 steel, is given birth to the present invention using forging, rolling bonding technique Production there are the problems such as production cost is high, the cycle is long, while the two there are larger area in terms of Composition Control, other production technologies Not；
" the advanced heap-type of nuclear power and China's nuclear power developing,《Chinese engineering science》, volume 2005,7, o. 11th " mainly introduce Be nuclear power generating sets heap-type and China's nuclear power technology development, do not relate to specifically equipment and steel grade.
The midium-carbon steel referred in above-mentioned document is not used to the key equipment in nuclear power station, is not belonging to core level-one and sets It is standby.
The content of the invention
It is an object of the invention to overcome the above problem and deficiency and provide a kind of 600MPa grades of core first device steel and Its manufacture method, steel plate keep higher level in the mechanical property of QT states, SPWHT states, while under two states 150 DEG C of high temperature tensile properties with it is basically identical under normal temperature state.Intensity and toughness at steel plate thickness 1/4 match good, group Knit the demand of the different parts steel such as stabilization, entirely appropriate core level key equipment steam generator, safety injection tank end socket, cylinder.
The object of the present invention is achieved like this：
A kind of 600MPa grades of core first device steel, the component of the steel are as follows by weight percentage：C：0.10%~ 0.20%th, Si：0.10%~0.40%, Mn：1.30%~1.60%, Mo：0.40%~0.60%, Ni：0.65%~ 0.85%th, Cr：0.30%~0.45%, V：0.02%~0.05%, B：0.0005%~0.004%,：P≤0.012%, S≤ 0.008%, [H]≤2.0ppm, [O]≤30ppm, surplus are Fe and inevitable impurity.
Steel plate composition design reason of the present invention is as follows：
C：C is the essential element for ensureing armor plate strength in steel, and in the technical program, C content is less than 0.10%, and matrix is solid Molten invigoration effect deficiency, causes tensile strength to can not meet requirement, particularly through 16 it is small when long-time SPWHT and 150 The intensity of DEG C drawing by high temperature state can further decline；On the contrary, C content is more than 0.20%, can directly cause under toughness plasticity Drop.Therefore C content scope is 0.10%~0.20% in application claims steel.
Si：Si is effective intensified element, plays deoxidation, requires Si contents to be not less than in the technical program 0.10%；But content is higher to bring toughness plasticity to decline, and deteriorates welding performance, therefore it is 0.40% to control Si upper content limits.
Mn：Mn elements are in addition to serving and strengthening matrix in steel, moreover it is possible to effectively improve the quenching degree of steel, similarly help to Improving intensity but reduces tough, plasticity, therefore the control of the technical program Mn contents is 1.30%~1.60%.
Mo：The effect of Mo is to improve quenching degree, heat resistance, and is reduced with Cr, Mn collective effect or suppress temper brittleness.When Temper brittleness can be almost completely eliminated at 0.5% or so in the control of Mo contents in steel；But when Mo contents are less than 0.20% or big It is when 0.80%, then little to the action effect of the Low-Temperature Temper Brittleness of steel, it is thus determined that in Mo composition ranges for 0.40~ 0.60%.
Ni：Ni can be obviously improved the low-temperature flexibility of steel, while improve the low-temperature flexibility of thick section steel plate, have steel plate Also there is higher toughness while having sufficient intensity, meet the requirement of index.It is higher in view of the intensity of steel of the present invention requirement, Toughness can be reduced to a certain extent, it is necessary to increase appropriate Ni to make up the loss of toughness, therefore the technical program Ni contents Control as 0.65%-0.85%.
Cr：Cr can significantly improve the antioxidation of steel in steel, increase resistance to corrosion.Reduce austenite phase at the same time Area, improves the through hardening performance of steel.But Cr can also significantly improve the brittle transition temperature of steel, promote temper brittleness.Further to protect The stability of intensity, Cr contents control range of the present invention are when demonstrate,proving steel plate different conditions：0.30%~0.45%.
V：Midium-carbon steel requirement is fine-grained steel, smaller than coarse-grained steel irradiation brittleness.V is added in steel to be had crystal grain thinning, carries High grain coarsening temperature effect.More important is in steel plus after V, separate out second phase particles in long-time SPWHT processes at the same time In can play the role of effectively crystal boundary " anchoring ", delay the decline of intensity.Therefore V content scope of the present invention is 0.02%- 0.05%.
B：Micro B is added in steel, steel plate quenching degree, but toughness, plasticity for steel plate can be effectively improved after solid solution It is unfavorable, while easily produce radiation embrittlement, therefore B content is not easy excessive, it is 0.0005- that the present invention, which controls B content scope, 0.004%.
P：Irradiation test shows that P is also very sensitive to radiation embrittlement, while P content is higher, is also easy in aggravating in steel The heart is segregated and the generation of center porosity, therefore it is required that the P content in steel is more low better, P content control range of the present invention for≤ 0.012%.
S：S in steel easily formed S compounds be mingled with, reduce impact flexibility, influence welding performance, at the same aggravate center segregation, The generation of the defects of loose, therefore S contents control range of the present invention is≤0.008%.
Gas [H], [O]：Generally speaking, their performances to steel are harmful, while can also increase radiation embrittlement effect, because This wishes their content to be reduced to floor level.Application claims [H], [O] content control range for [H]≤2.0ppm, [O]≤30ppm。
The manufacture method of steel plate of the present invention is：
A kind of manufacture method of 600MPa grades of core first device steel, including smelt, roll, be heat-treated,
Smelt：Using electric furnace, converter or other can meet the smelting modes of component requirements；
Rolling：Billet heating temperature >=1100 DEG C, average rolling pass deflection >=10%, steel plate thickness 30- after rolling 120mm；
Heat treatment：Steel plate carries out modifier treatment after rolling, it is ensured that even tissue, crystal grain are tiny, performance is stablized；Modifier treatment work Skill is：
Quenching：910 DEG C ± 15 DEG C, soaking time:2min/mm-4min/mm, fully keeps the temperature to ensure that each element is filled in steel Divide solid solution, form uniform austenite structure, carry out water quenching immediately after until surface of steel plate temperature is down to less than 100 DEG C；
Tempering：620 DEG C ± 10 DEG C, soaking time:2min/mm-3.5min/mm to ensure Carbide Precipitation in steel, and shape Into stable tempered sorbite tissue.
The beneficial effects of the present invention are：
Steel plate thickness 30-120mm of the present invention, steel plate of the present invention are respectively provided with stable intensive properties after QT, under different conditions Energy：
From the point of view of QT and SPWHT two states room temperature and 150 DEG C of high temperature tensile properties, Strength Changes at steel plate thickness 1/4 Amplitude is smaller and stablizes, and fully meets index request.And steel plate of the present invention, after QT, -20 DEG C of impacts under different conditions are inhaled Receive energy and be equally maintained at higher level, not only meet the requirement of index, but also there is larger surplus.
Embodiment
Below by embodiment, the present invention is further illustrated.
A kind of manufacture method of 600MPa grades of core first device steel, including smelt, roll, be heat-treated,
(1) roll：Billet heating temperature >=1100 DEG C, average rolling pass deflection >=10%；
(2) it is heat-treated：Steel plate carries out modifier treatment after rolling, the modifier treatment technique is：
Quenching：910 DEG C ± 15 DEG C, soaking time:2min/mm-4min/mm；Water quenching is carried out immediately after until steel plate table Face temperature is down to less than 100 DEG C；
Tempering：620 DEG C ± 10 DEG C, soaking time:2min/mm-3.5min/mm.
The embodiment of the present invention is smelted, rolled, is heat-treated according to the component proportion of technical solution.The embodiment of the present invention The component of steel is shown in Table 1.The main technologic parameters of steel of the embodiment of the present invention are shown in Table 2.The performance of steel of the embodiment of the present invention is shown in Table 3.
The component of 1 steel of the embodiment of the present invention of table
Embodiment C Si Mn P S Mo Ni Cr V B H/ppm O/ppm
1 0.13 0.24 1.55 0.008 0.002 0.55 0.80 0.40 0.040 0.0005 1.0 29
2 0.14 0.25 1.50 0.008 0.0007 0.52 0.78 0.41 0.040 0.0006 1.5 21
3 0.15 0.29 1.53 0.006 0.0009 0.50 0.79 0.36 0.041 0.0008 1.7 25
4 0.16 0.22 1.49 0.008 0.0006 0.50 0.75 0.37 0.030 0.002 1.1 22
5 0.16 0.24 1.51 0.005 0.001 0.48 0.72 0.42 0.035 0.002 1.6 17
6 0.18 0.25 1.46 0.007 0.001 0.47 0.82 0.42 0.040 0.0025 1.8 22
7 0.19 0.28 1.57 0.009 0.0009 0.53 0.84 0.44 0.042 0.0026 1.2 12
8 0.19 0.22 1.46 0.007 0.001 0.50 0.74 0.40 0.040 0.0028 1.4 13
The main technologic parameters of 2 steel of the embodiment of the present invention of table
The performance of 3 steel of the embodiment of the present invention of table

Claims (2)

1. a kind of 600MPa grades of core first device steel, it is characterised in that the component of the steel is as follows by weight percentage：C： 0.10%~0.20%, Si：0.10%~0.40%, Mn：1.30%~1.60%, Mo：0.40%~0.60%, Ni： 0.65%~0.85%, Cr：0.30%~0.45%, V：0.02%~0.05%, B：0.0005%~0.004%,：P≤ 0.012%th, S≤0.008%, [H]≤2.0ppm, [O]≤30ppm, surplus are Fe and inevitable impurity.
2. a kind of manufacture method of the 600MPa level core first device steel described in claim 1, including smelt, roll, at heat Reason, it is characterised in that：
(1) roll：Billet heating temperature >=1100 DEG C, average rolling pass deflection >=10%；
(2) it is heat-treated：Steel plate carries out modifier treatment after rolling, the modifier treatment technique is：
Quenching：910 DEG C ± 15 DEG C, soaking time:2min/mm-4min/mm；Water quenching is carried out immediately after until surface of steel plate temperature Degree is down to less than 100 DEG C；
Tempering：620 DEG C ± 10 DEG C, soaking time:2min/mm-3.5min/mm.
CN201610952951.8A 2016-10-27 2016-10-27 A kind of 600MPa grades of core first device steel and its manufacture method Pending CN107988566A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109182910A (en) * 2018-10-20 2019-01-11 江苏铸鸿锻造有限公司 A kind of carbon manganese steel forging circle of low-temperature impact-resistant and preparation method thereof
CN109536839A (en) * 2018-12-25 2019-03-29 鞍钢铸钢有限公司 A kind of midium-carbon steel ingot and production method

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CN103882333A (en) * 2012-12-21 2014-06-25 鞍钢股份有限公司 Steel for 620 MPa level nuclear first grade equipment and manufacturing method thereof
CN105506508A (en) * 2014-09-26 2016-04-20 鞍钢股份有限公司 Steel used for third-generation nuclear power safety injection tank base plate and manufacturing method of steel

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CN101476088A (en) * 2008-12-31 2009-07-08 钢铁研究总院 R17Cr1Ni3Mo steel for nuclear pressure vessel and preparation thereof
CN102181804A (en) * 2011-05-16 2011-09-14 舞阳钢铁有限责任公司 Steel plate for Class I nuclear key equipment and manufacturing method thereof
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