WO2022236961A1 - Api 2w-50 steel plate for offshore oil platform, and production method therefor - Google Patents

Api 2w-50 steel plate for offshore oil platform, and production method therefor Download PDF

Info

Publication number
WO2022236961A1
WO2022236961A1 PCT/CN2021/108095 CN2021108095W WO2022236961A1 WO 2022236961 A1 WO2022236961 A1 WO 2022236961A1 CN 2021108095 W CN2021108095 W CN 2021108095W WO 2022236961 A1 WO2022236961 A1 WO 2022236961A1
Authority
WO
WIPO (PCT)
Prior art keywords
api
steel plate
offshore oil
rolling
oil platforms
Prior art date
Application number
PCT/CN2021/108095
Other languages
French (fr)
Chinese (zh)
Inventor
徐椿森
靳星
吴俊平
潘中德
刘继宏
倪卫莹
Original Assignee
南京钢铁股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 南京钢铁股份有限公司 filed Critical 南京钢铁股份有限公司
Publication of WO2022236961A1 publication Critical patent/WO2022236961A1/en

Links

Classifications

    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
    • 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
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/009—Pearlite

Definitions

  • the invention relates to the technical field of steel production, in particular to an API 2W-50 steel plate for offshore oil platforms and a production method thereof.
  • Offshore structures need to withstand the test of harsh environments such as sea typhoon, severe cold and high salt spray, so API-2W steel plates for offshore structures are required not only to have high strength and high plasticity, good welding performance and seawater erosion resistance, but also to have excellent Low temperature toughness in the full thickness direction, which requires excellent comprehensive properties such as low temperature service, strain resistance, easy welding, and corrosion resistance, so as to ensure that steel and equipment can adapt to various loads and low temperature environments, and meet various complex working conditions and harsh natural conditions at sea. environment requirements.
  • API 2W-50 is the API-2W-2019 standard that specifies the chemical composition, mechanical properties, and supplementary technical requirements of SR1-SR12 for API-2W-50Z offshore structural steel.
  • the chemical composition of API 2W-50Z steel such as C, P, S, N, V, B and the addition of alloy elements are more stringent, and the impact toughness also requires a -40°C transverse temperature at 1/2 of the thickness. Low temperature impact, in addition, lower CEV and Pcm are required to ensure excellent welding performance.
  • the existing EH36 and EH40 steel plates for offshore oil platforms generally do not require 1/2 impact toughness, and precious alloys such as Nb, V, Mo, Ni, etc. are added in a composite way, but 1/2 impact toughness is unstable, and the production cost High, long lead time.
  • the present invention aims at the above technical problems, overcomes the shortcomings of the prior art, and provides an API 2W-50 steel plate for offshore oil platforms, the chemical composition and weight percentage of which are: C: 0.06% to 0.08%, Mn: 1.45% to 1.55% , Si: 0.15% ⁇ 0.25%, P ⁇ 0.013%, S ⁇ 0.003%, Nb: 0.020% ⁇ 0.030%, V ⁇ 0.006%, Ti: 0.007% ⁇ 0.020%, Alt: 0.025% ⁇ 0.050%, Cr: 0.13% ⁇ 0.19%, Ni: 0.30% ⁇ 0.40%, Mo ⁇ 0.08%, Cu ⁇ 0.35%, N ⁇ 0.006%, H ⁇ 0.006%, CEV ⁇ 0.38%, Pcm ⁇ 0.20%, the rest is Fe and impurities .
  • the present invention adopts low-carbon, Nb, Ni, Cr composite added component design, utilizes ultra-low P, S smelting technology, combined with electromagnetic stirring technology, and accurately controls the C-type segregation of continuous casting slabs, and obtains C0.5 High-quality cast slab with grade center segregation; the composition design does not add precious alloys such as V and Mo, the design CEV ⁇ 0.38%, Pcm ⁇ 0.20%, and the steel plate welding performance is more excellent.
  • API 2W-50 steel plate for offshore oil platform its chemical composition and weight percentage are: C: 0.065%-0.075%, Mn: 1.48%-1.52%, Si: 0.18%-0.22% , P ⁇ 0.012%, S ⁇ 0.002%, Nb: 0.022% ⁇ 0.028%, V ⁇ 0.005%, Ti: 0.010% ⁇ 0.015%, Alt: 0.025% ⁇ 0.040%, Cr: 0.13% ⁇ 0.16%, Ni: 0.30% ⁇ 0.35%, Mo ⁇ 0.05%, Cu ⁇ 0.10%, N ⁇ 0.005%, H ⁇ 0.0002%, CEV ⁇ 0.37%, Pcm ⁇ 0.19%, the rest is Fe and impurities.
  • API 2W-50 steel plate for offshore oil platform its chemical composition and weight percentage are: C: 0.065%-0.080%, Mn: 1.45%-1.52%, Si: 0.15%-0.22% , P ⁇ 0.011%, S ⁇ 0.003%, Nb: 0.025% ⁇ 0.030%, V ⁇ 0.004%, Ti: 0.007% ⁇ 0.013%, Alt: 0.030% ⁇ 0.050%, Cr: 0.13% ⁇ 0.16%, Ni: 0.32% ⁇ 0.40%, Mo ⁇ 0.04%, Cu ⁇ 0.08%, N ⁇ 0.005%, H ⁇ 0.0002%, CEV ⁇ 0.38%, Pcm ⁇ 0.20%, the rest is Fe and impurities.
  • Another object of the present invention is to provide a kind of production method of API 2W-50 steel plate for offshore oil platform, does not need to adopt tempering heat treatment process, comprises the following steps:
  • Heating process the billet is heated in a heating furnace, the heating coefficient is ⁇ 10.0min/cm, and the heating temperature is 1150-1180°C;
  • Rolling process 320mm large-section continuous casting slab is used, under the condition of low compression ratio ⁇ 4 times, two-stage controlled rolling process is adopted, especially the rolling temperature in the first stage is between 930-970°C, and the distribution is reasonable Rolling pass and pass reduction rate, that is, the reduction rate of the last three rough rolling passes is ⁇ 25%;
  • Cooling process the rolled steel plate is put into the ultra-fast cooling system for rapid cooling, and then stacked for slow cooling, and the stacking time is 72 hours or more.
  • the starting temperature of the second stage of 50mm specification is ⁇ 860°C
  • the starting temperature of the second stage of 75mm specification is ⁇ 830°C.
  • the red temperature of 50 and 75mm specifications is 620°C to 670°C.
  • the aforementioned API 2W-50 steel plate for offshore oil platforms and its production method the thickness of the produced steel plate is 50-75mm.
  • the aforementioned API 2W-50 steel plate for offshore oil platforms and its production method the structure of the produced steel plate is ferrite + pearlite + a small amount of bainite structure.
  • Adopt 320mm large-section continuous casting slab in the present invention under the condition of low pressure reduction ratio, technologies such as rough rolling large reduction in TMCP process, low-temperature controlled rolling, post-rolling ultra-quick cooling etc., rationally distribute rolling track Rough rolling and pass reduction rate, that is, rough rolling large reduction technology with a reduction rate of ⁇ 25% in the last 3 passes of rough rolling, to obtain API 2W-50 steel plates with a thickness of 50 and 75 mm;
  • the transverse impact toughness Akv ⁇ 300J at -40°C at 1/2 of the thickness of the steel plate, the Z35 performance in the thickness direction of the steel plate is ⁇ 60%, and the excellent performance of the product is guaranteed without adopting the tempering heat treatment process , to achieve economical and mass production of steel plates;
  • the slab is heated in a heating furnace, the heating coefficient is ⁇ 10.0min/cm, and the heating temperature is 1150-1180°C, which ensures the uniformity of heating of the slab, especially the uniformity of temperature at 1/2 of the thickness;
  • the present invention guarantees the lateral impact toughness Akv ⁇ 300J at -40°C at 1/2 of the plate thickness, and because the design CEV ⁇ 0.38%, Pcm ⁇ 0.20%, the welding performance is more excellent, and the comprehensive mechanical properties are excellent, which can realize the economy, Mass production meets the requirements of various complex working conditions at sea and harsh natural environments.
  • An API 2W-50 steel plate for offshore oil platforms provided in this example has a thickness of 50 mm and a component content (wt) of: C: 0.073%, Mn: 1.48%, P: 0.006%, S: 0.001%, Si: 0.21%, Alt: 0.030%, Nb: 0.023%, V: 0.002%, Ti: 0.014%, Ni: 0.32%, Cr: 0.15%, Cu: 0.02%, Mo: 0.004%, CEV: 0.37%, Pcm: 0.17%, the rest is Fe and impurities.
  • the production method of the above-mentioned steel plate does not need to adopt the tempering heat treatment process, and includes the following steps:
  • Heating process the slab is heated in a heating furnace with a heating coefficient of 11.0min/cm, a heating temperature of 1158°C, and a soaking time of 48 minutes in the soaking section to ensure the uniformity of heating of the slab, especially the temperature uniformity at 1/2 of the thickness;
  • Rolling process 320mm large cross-section continuous casting slab is used, under the condition of low pressure reduction ratio, two-stage controlled rolling process is adopted, the rolling temperature of the first stage is 965°C, and the reduction rate of the last two passes of this stage is 31% and 29% ;
  • the rolling temperature of the second stage is 859°C and the final rolling temperature is 838°C;
  • Cooling process the rolled steel plate is put into the ultra-fast cooling system for rapid cooling, and the red temperature is 668°C; then it is stacked and slowly cooled, and the stacking time is 72 hours or more.
  • the mechanical properties are: yield strength 410MPa, tensile strength 530MPa, yield ratio 77%, elongation after fracture 31%, additional yield strength 410MPa, additional tensile strength 525MPa, additional yield ratio 78%, additional elongation after fracture 30 %, Impact energy Akv at 1/2 of transverse thickness at -40°C: 369J, 396J, 401J, Z direction: 68%, 70%, 69%, additional Z direction: 70%, 70%, 69%.
  • An API 2W-50 steel plate for offshore oil platforms provided in this example has a thickness of 75 mm and a component content (wt) of: C: 0.069%, Mn: 1.50%, P: 0.008%, S: 0.001%, Si: 0.22%, Alt: 0.036%, Nb: 0.022%, V: 0.002%, Ti: 0.014%, Ni: 0.32%, Cr: 0.15%, Cu: 0.02%, Mo: 0.007%, CEV: 0.37%, Pcm: 0.17%, the rest is Fe and impurities.
  • the production method of the above-mentioned steel plate does not need to adopt the tempering heat treatment process, and includes the following steps:
  • Heating process the slab is heated in a heating furnace with a heating coefficient of 11.5min/cm, a heating temperature of 1165°C, and a soaking time of 47 minutes in the soaking section to ensure the uniformity of heating of the slab, especially the uniformity of temperature at 1/2 of the thickness;
  • Rolling process 320mm large cross-section continuous casting slab is used, under the condition of low pressure reduction ratio, two-stage controlled rolling process is adopted, the rolling temperature of the first stage is 930°C, and the reduction rate of the last two passes of this stage is 29% and 27% ;
  • the rolling temperature of the second stage is 790°C and the final rolling temperature is 770°C;
  • Cooling process the rolled steel plate is put into the ultra-fast cooling system for rapid cooling, and the red temperature is 626°C; then it is stacked and slowly cooled, and the stacking time is 72 hours or more.
  • the mechanical properties are: yield strength 470MPa, tensile strength 580MPa, yield ratio 81%, elongation after fracture 29%, additional yield strength 455MPa, additional tensile strength 580MPa, additional yield ratio 78%, and additional elongation after fracture 32 %, Impact energy Akv at 1/2 of transverse thickness at -40°C: 410J, 421J, 386J, Z direction: 67%, 69%, 68%, additional Z direction: 70%, 69%, 70%.
  • the present invention adopts low-carbon, Nb, Ni, and Cr composite added component design, uses 320mm large-section continuous casting slab, adopts continuous casting electromagnetic stirring and continuous casting slab C-type segregation precision control technology, TMCP process API 2W-50Z products with excellent low-temperature toughness are produced by advanced rough rolling and high-reduction technologies, low-temperature controlled rolling, and ultra-fast cooling after rolling.
  • the 50mm and 750mm thick API 2W-50Z steel plates meet the performance requirements of the API-2W-2019 standard.
  • the structure of the steel plate is ferrite + pearlite + a small amount of bainite structure.
  • the transverse impact toughness at -40°C at 1/2 of the steel plate thickness is Akv ⁇ 300J, the Z35 performance in the thickness direction of the steel plate is ⁇ 60%; the design CEV ⁇ 0.38%, Pcm ⁇ 0.20%, the steel plate welding performance is more excellent. It can realize economical and mass production of steel plates, and meet the requirements of various complex working conditions at sea and harsh natural environments.
  • the present invention can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Abstract

Provided are an API 2W-50 steel plate for an offshore oil platform, and a production method therefor, which relate to the technical field of steel production. The API 2W-50 steel plate comprises the following chemical components in percentage by weight: C: 0.06% - 0.08%, Mn: 1.45% - 1.55%, Si: 0.15% - 0.25%, P≤0.013%, S≤0.003%, Nb: 0.020% - 0.030%, V≤0.006%, Ti: 0.007% - 0.020%, Alt: 0.025% - 0.050%, Cr: 0.13% - 0.19%, Ni: 0.30% - 0.40%, Mo≤0.08%, Cu≤0.35%, N≤0.006%, H≤0.006%, CEV≤0.38% and Pcm≤0.20%, with the balance being Fe and impurities. The API 2W-50Z steel plate meets the performance requirements of standard API-2W-2019, the transverse impact toughness Akv at -40ºC at 1/2 the thickness of the steel plate is ≥ 300 J, and the Z35 performance in the thickness direction of the steel plate is ≥ 60%; and CEV is designed to be ≤ 0.38%, Pcm is designed to be ≤ 0.20%, and the welding performance of the steel plate is much improved.

Description

一种海洋石油平台用API 2W-50钢板及其生产方法API 2W-50 steel plate for offshore oil platform and production method thereof 技术领域technical field
本发明涉及钢铁生产技术领域，特别是涉及一种海洋石油平台用API 2W-50钢板及其生产方法。The invention relates to the technical field of steel production, in particular to an API 2W-50 steel plate for offshore oil platforms and a production method thereof.
背景技术Background technique
近年来，海上资源开发与出口是中东地区国家发展和经济的重要支柱，随着对海洋资源的大量开发和出口，海上平台、海洋工程等用钢的需求量不断扩大，而API-2W-2019标准专为近海结构钢设计的钢板，市场需求量大，经济效益较好。In recent years, the development and export of offshore resources has been an important pillar of the development and economy of countries in the Middle East. With the massive development and export of marine resources, the demand for steel used in offshore platforms and ocean engineering has continued to expand. API-2W-2019 The standard steel plate specially designed for offshore structural steel has a large market demand and good economic benefits.
海上结构需经受海面台风、严寒冰冻、高盐雾等恶劣环境的考验，因此要求API-2W近海结构用钢板不但具有高强度和高塑性，良好的焊接性能及耐海水侵蚀性能，还应具备优异的全厚度方向低温韧性，即要求低温服役、抗应变、易焊接、耐腐蚀等综合性能优异，以保证钢材和设备能适应各种载荷和低温环境，满足海上各种复杂工况条件和恶劣自然环境下使用要求。Offshore structures need to withstand the test of harsh environments such as sea typhoon, severe cold and high salt spray, so API-2W steel plates for offshore structures are required not only to have high strength and high plasticity, good welding performance and seawater erosion resistance, but also to have excellent Low temperature toughness in the full thickness direction, which requires excellent comprehensive properties such as low temperature service, strain resistance, easy welding, and corrosion resistance, so as to ensure that steel and equipment can adapt to various loads and low temperature environments, and meet various complex working conditions and harsh natural conditions at sea. environment requirements.
API 2W-50是API-2W-2019标准规定了API-2W-50Z近海结构钢的化学成分、力学性能、SR1-SR12补充技术要求等。与普通Q345E级别钢板相比，API 2W-50Z钢种化学成分如C、P、S、N、V、B及合金元素添加要求更苛刻，冲击韧性同时要求厚度1/2处的-40℃横向低温冲击，另外要求更低的CEV和Pcm要求保证优异的焊接性能。API 2W-50 is the API-2W-2019 standard that specifies the chemical composition, mechanical properties, and supplementary technical requirements of SR1-SR12 for API-2W-50Z offshore structural steel. Compared with ordinary Q345E grade steel plate, the chemical composition of API 2W-50Z steel such as C, P, S, N, V, B and the addition of alloy elements are more stringent, and the impact toughness also requires a -40°C transverse temperature at 1/2 of the thickness. Low temperature impact, in addition, lower CEV and Pcm are required to ensure excellent welding performance.
现有的海洋石油平台用EH36、EH40钢板，一般情况下不要求1/2冲击韧性，贵重合金如Nb、V、Mo、Ni等复合添加的方式，但是1/2冲击韧性不稳定，生产成本高，交货周期长。The existing EH36 and EH40 steel plates for offshore oil platforms generally do not require 1/2 impact toughness, and precious alloys such as Nb, V, Mo, Ni, etc. are added in a composite way, but 1/2 impact toughness is unstable, and the production cost High, long lead time.
发明内容Contents of the invention
本发明针对上述技术问题，克服现有技术的缺点，提供一种海洋石油平台用API 2W-50钢板，其化学成分及重量百分比为：C：0.06％～0.08％，Mn：1.45％～ 1.55％，Si：0.15％～0.25％，P≤0.013％，S≤0.003％，Nb：0.020％～0.030％，V≤0.006％，Ti：0.007％～0.020％，Alt：0.025％～0.050％，Cr：0.13％～0.19％，Ni：0.30％～0.40％，Mo≤0.08％，Cu≤0.35％，N≤0.006％，H≤0.006％，CEV≤0.38％，Pcm≤0.20％，其余部分为Fe和杂质。The present invention aims at the above technical problems, overcomes the shortcomings of the prior art, and provides an API 2W-50 steel plate for offshore oil platforms, the chemical composition and weight percentage of which are: C: 0.06% to 0.08%, Mn: 1.45% to 1.55% , Si: 0.15%～0.25%, P≤0.013%, S≤0.003%, Nb: 0.020%～0.030%, V≤0.006%, Ti: 0.007%～0.020%, Alt: 0.025%～0.050%, Cr: 0.13%～0.19%, Ni: 0.30%～0.40%, Mo≤0.08%, Cu≤0.35%, N≤0.006%, H≤0.006%, CEV≤0.38%, Pcm≤0.20%, the rest is Fe and impurities .
技术效果：本发明采用低碳、Nb、Ni、Cr复合添加的成分设计，利用超低P、S的冶炼工艺技术，结合电磁搅拌工艺，连铸坯C类偏析精准控制，获得了C0.5级中心偏析的高质量铸坯；成分设计不添加V、Mo等贵重合金，设计CEV≤0.38％，Pcm≤0.20％，钢板焊接性能更加优异。Technical effect: the present invention adopts low-carbon, Nb, Ni, Cr composite added component design, utilizes ultra-low P, S smelting technology, combined with electromagnetic stirring technology, and accurately controls the C-type segregation of continuous casting slabs, and obtains C0.5 High-quality cast slab with grade center segregation; the composition design does not add precious alloys such as V and Mo, the design CEV≤0.38%, Pcm≤0.20%, and the steel plate welding performance is more excellent.
本发明进一步限定的技术方案是：The technical scheme further defined in the present invention is:
前所述的一种海洋石油平台用API 2W-50钢板的生产方法，其化学成分及重量百分比为：C：0.065％～0.075％，Mn：1.48％～1.52％，Si：0.18％～0.22％，P≤0.012％，S≤0.002％，Nb：0.022％～0.028％，V≤0.005％，Ti：0.010％～0.015％，Alt：0.025％～0.040％，Cr：0.13％～0.16％，Ni：0.30％～0.35％，Mo≤0.05％，Cu≤0.10％，N≤0.005％，H≤0.0002％，CEV≤0.37％，Pcm≤0.19％，其余部分为Fe和杂质。The aforementioned production method of API 2W-50 steel plate for offshore oil platform, its chemical composition and weight percentage are: C: 0.065%-0.075%, Mn: 1.48%-1.52%, Si: 0.18%-0.22% , P≤0.012%, S≤0.002%, Nb: 0.022%～0.028%, V≤0.005%, Ti: 0.010%～0.015%, Alt: 0.025%～0.040%, Cr: 0.13%～0.16%, Ni: 0.30%～0.35%, Mo≤0.05%, Cu≤0.10%, N≤0.005%, H≤0.0002%, CEV≤0.37%, Pcm≤0.19%, the rest is Fe and impurities.
前所述的一种海洋石油平台用API 2W-50钢板的生产方法，其化学成分及重量百分比为：C：0.065％～0.080％，Mn：1.45％～1.52％，Si：0.15％～0.22％，P≤0.011％，S≤0.003％，Nb：0.025％～0.030％，V≤0.004％，Ti：0.007％～0.013％，Alt：0.030％～0.050％，Cr：0.13％～0.16％，Ni：0.32％～0.40％，Mo≤0.04％，Cu≤0.08％，N≤0.005％，H≤0.0002％，CEV≤0.38％，Pcm≤0.20％，其余部分为Fe和杂质。The aforementioned production method of API 2W-50 steel plate for offshore oil platform, its chemical composition and weight percentage are: C: 0.065%-0.080%, Mn: 1.45%-1.52%, Si: 0.15%-0.22% , P≤0.011%, S≤0.003%, Nb: 0.025%～0.030%, V≤0.004%, Ti: 0.007%～0.013%, Alt: 0.030%～0.050%, Cr: 0.13%～0.16%, Ni: 0.32%～0.40%, Mo≤0.04%, Cu≤0.08%, N≤0.005%, H≤0.0002%, CEV≤0.38%, Pcm≤0.20%, the rest is Fe and impurities.
本发明的另一目的在于提供一种海洋石油平台用API 2W-50钢板的生产方法，不需要采用回火热处理工艺，包括以下步骤：Another object of the present invention is to provide a kind of production method of API 2W-50 steel plate for offshore oil platform, does not need to adopt tempering heat treatment process, comprises the following steps:
炼钢工序：采用铁水预处理脱S、转炉深脱P、LF深脱S、RH深脱N、H；采用动态轻压下、电磁搅拌技术，连铸坯中心偏析C0.5级；Steelmaking process: hot metal pretreatment for S removal, converter deep P removal, LF deep S removal, RH deep N and H removal; dynamic light reduction and electromagnetic stirring technology are adopted, and the center segregation of continuous casting billet is C0.5;
加热工序：铸坯入加热炉加热，加热系数≥10.0min/cm，加热温度1150～1180℃；Heating process: the billet is heated in a heating furnace, the heating coefficient is ≥10.0min/cm, and the heating temperature is 1150-1180°C;
轧制工序：采用320mm大断面连铸坯，在压缩比＜4倍的低圧缩比条件下，采用2阶段控轧工艺，特别是第一阶段轧制温度在930～970℃之间，合理分配轧制道次和道次压下率，即粗轧最后3道次压下率≥25％；Rolling process: 320mm large-section continuous casting slab is used, under the condition of low compression ratio < 4 times, two-stage controlled rolling process is adopted, especially the rolling temperature in the first stage is between 930-970°C, and the distribution is reasonable Rolling pass and pass reduction rate, that is, the reduction rate of the last three rough rolling passes is ≥ 25%;
冷却工序：轧制后的钢板入超快冷系统进行快速冷却，然后进行堆垛缓冷，堆垛时间72小时及以上。Cooling process: the rolled steel plate is put into the ultra-fast cooling system for rapid cooling, and then stacked for slow cooling, and the stacking time is 72 hours or more.
前所述的一种海洋石油平台用API 2W-50钢板的生产方法，轧制工序中，50mm规格第二阶段的开轧温度≤860℃，75mm规格第二阶段的开轧温度≤830℃。In the production method of API 2W-50 steel plate for offshore oil platforms mentioned above, in the rolling process, the starting temperature of the second stage of 50mm specification is ≤860°C, and the starting temperature of the second stage of 75mm specification is ≤830°C.
前所述的一种海洋石油平台用API 2W-50钢板及其生产方法，冷却工序中，50、75mm规格返红温度620℃～670℃。In the aforementioned API 2W-50 steel plate for offshore oil platforms and its production method, in the cooling process, the red temperature of 50 and 75mm specifications is 620°C to 670°C.
前所述的一种海洋石油平台用API 2W-50钢板及其生产方法，生产的钢板厚度为50-75mm。The aforementioned API 2W-50 steel plate for offshore oil platforms and its production method, the thickness of the produced steel plate is 50-75mm.
前所述的一种海洋石油平台用API 2W-50钢板及其生产方法，生产的钢板组织为铁素体+珠光体+少量贝氏体组织。The aforementioned API 2W-50 steel plate for offshore oil platforms and its production method, the structure of the produced steel plate is ferrite + pearlite + a small amount of bainite structure.
本发明的有益效果是：The beneficial effects of the present invention are:
(1)本发明中采用320mm大断面连铸坯，在低圧缩比条件下，TMCP工艺过程中的粗轧大压下、低温控轧、轧后超快冷等技术，合理分配轧制道次和道次压下率，即粗轧最后3道次压下率≥25％的粗轧大压下技术，获得50、75mm厚度API 2W-50钢板；(1) Adopt 320mm large-section continuous casting slab in the present invention, under the condition of low pressure reduction ratio, technologies such as rough rolling large reduction in TMCP process, low-temperature controlled rolling, post-rolling ultra-quick cooling etc., rationally distribute rolling track Rough rolling and pass reduction rate, that is, rough rolling large reduction technology with a reduction rate of ≥ 25% in the last 3 passes of rough rolling, to obtain API 2W-50 steel plates with a thickness of 50 and 75 mm;
(2)本发明工艺条件下的钢板厚度1/2处-40℃横向冲击韧性Akv≥300J，钢板厚度方向Z35性能≥60％，不需要采用回火热处理工艺的前提下，保证产品优异的性能，实现钢板的经济、批量生产；(2) Under the process conditions of the present invention, the transverse impact toughness Akv≥300J at -40°C at 1/2 of the thickness of the steel plate, the Z35 performance in the thickness direction of the steel plate is ≥60%, and the excellent performance of the product is guaranteed without adopting the tempering heat treatment process , to achieve economical and mass production of steel plates;
(3)本发明中铸坯入加热炉加热，加热系数≥10.0min/cm，加热温度1150～1180℃，保证铸坯加热均匀性，特别是厚度1/2处温度的均匀性；(3) In the present invention, the slab is heated in a heating furnace, the heating coefficient is ≥10.0min/cm, and the heating temperature is 1150-1180°C, which ensures the uniformity of heating of the slab, especially the uniformity of temperature at 1/2 of the thickness;
(4)本发明保证板厚1/2处-40℃横向冲击韧性Akv≥300J，由于设计CEV≤0.38％，Pcm≤0.20％，焊接性能更加优异，综合力学性能优异，可实现钢板的经济、批量生产，满足海上各种复杂工况条件和恶劣自然环境下使用要求。(4) The present invention guarantees the lateral impact toughness Akv≥300J at -40°C at 1/2 of the plate thickness, and because the design CEV≤0.38%, Pcm≤0.20%, the welding performance is more excellent, and the comprehensive mechanical properties are excellent, which can realize the economy, Mass production meets the requirements of various complex working conditions at sea and harsh natural environments.
具体实施方式Detailed ways
实施例1Example 1
本实施例提供的一种海洋石油平台用API 2W-50钢板，厚度为50mm，成分含量(wt)为：C：0.073％、Mn：1.48％、P：0.006％、S：0.001％、Si：0.21％、Alt：0.030％、Nb：0.023％、V：0.002％、Ti：0.014％、Ni：0.32％、Cr：0.15％、Cu：0.02％、Mo：0.004％、CEV：0.37％、Pcm：0.17％，其余为Fe和杂质。An API 2W-50 steel plate for offshore oil platforms provided in this example has a thickness of 50 mm and a component content (wt) of: C: 0.073%, Mn: 1.48%, P: 0.006%, S: 0.001%, Si: 0.21%, Alt: 0.030%, Nb: 0.023%, V: 0.002%, Ti: 0.014%, Ni: 0.32%, Cr: 0.15%, Cu: 0.02%, Mo: 0.004%, CEV: 0.37%, Pcm: 0.17%, the rest is Fe and impurities.
上述钢板的生产方法，不需要采用回火热处理工艺，包括以下步骤：The production method of the above-mentioned steel plate does not need to adopt the tempering heat treatment process, and includes the following steps:
炼钢工序：采用铁水预处理脱S、转炉深脱P、LF深脱S、RH深脱N、H；采用动态轻压下、电磁搅拌技术，连铸坯中心偏析C1.0级；Steelmaking process: hot metal pretreatment for S removal, converter deep P removal, LF deep S removal, RH deep N and H removal; dynamic light reduction and electromagnetic stirring technology are adopted, and the center segregation of continuous casting slab is C1.0 level;
加热工序：铸坯入加热炉加热，加热系数11.0min/cm，加热温度1158℃，均热段保温时间48min，保证铸坯加热均匀性，特别是厚度1/2处温度的均匀性；Heating process: the slab is heated in a heating furnace with a heating coefficient of 11.0min/cm, a heating temperature of 1158°C, and a soaking time of 48 minutes in the soaking section to ensure the uniformity of heating of the slab, especially the temperature uniformity at 1/2 of the thickness;
轧制工序：采用320mm大断面连铸坯，在低圧缩比条件下，采用2阶段控轧工艺，第一阶段轧制温度965℃，此阶段最后2道次压下率为31％、29％；第二阶段开轧温度为859℃，终轧温度为838℃；Rolling process: 320mm large cross-section continuous casting slab is used, under the condition of low pressure reduction ratio, two-stage controlled rolling process is adopted, the rolling temperature of the first stage is 965°C, and the reduction rate of the last two passes of this stage is 31% and 29% ;The rolling temperature of the second stage is 859°C and the final rolling temperature is 838°C;
冷却工序：轧制后的钢板入超快冷系统进行快速冷却，返红温度为668℃；然后进行堆垛缓冷，堆垛时间72小时及以上。Cooling process: the rolled steel plate is put into the ultra-fast cooling system for rapid cooling, and the red temperature is 668°C; then it is stacked and slowly cooled, and the stacking time is 72 hours or more.
力学性能为：屈服强度410MPa，抗拉强度530MPa，屈强比77％，断后伸长率31％，追加屈服强度410MPa，追加抗拉强度525MPa，追加屈强比78％，追加 断后伸长率30％,-40℃横向厚度1/2处冲击功Akv：369J、396J、401J，Z向:68％、70％、69％，追加Z向:70％、70％、69％。The mechanical properties are: yield strength 410MPa, tensile strength 530MPa, yield ratio 77%, elongation after fracture 31%, additional yield strength 410MPa, additional tensile strength 525MPa, additional yield ratio 78%, additional elongation after fracture 30 %, Impact energy Akv at 1/2 of transverse thickness at -40°C: 369J, 396J, 401J, Z direction: 68%, 70%, 69%, additional Z direction: 70%, 70%, 69%.
实施例2Example 2
本实施例提供的一种海洋石油平台用API 2W-50钢板，厚度为75mm，成分含量(wt)为：C：0.069％、Mn：1.50％、P：0.008％、S：0.001％、Si：0.22％、Alt：0.036％、Nb：0.022％、V：0.002％、Ti：0.014％、Ni：0.32％、Cr：0.15％、Cu：0.02％、Mo：0.007％、CEV：0.37％、Pcm：0.17％，其余为Fe和杂质。An API 2W-50 steel plate for offshore oil platforms provided in this example has a thickness of 75 mm and a component content (wt) of: C: 0.069%, Mn: 1.50%, P: 0.008%, S: 0.001%, Si: 0.22%, Alt: 0.036%, Nb: 0.022%, V: 0.002%, Ti: 0.014%, Ni: 0.32%, Cr: 0.15%, Cu: 0.02%, Mo: 0.007%, CEV: 0.37%, Pcm: 0.17%, the rest is Fe and impurities.
上述钢板的生产方法，不需要采用回火热处理工艺，包括以下步骤：The production method of the above-mentioned steel plate does not need to adopt the tempering heat treatment process, and includes the following steps:
炼钢工序：采用铁水预处理脱S、转炉深脱P、LF深脱S、RH深脱N、H；采用动态轻压下、电磁搅拌技术，连铸坯中心偏析C0.5级；Steelmaking process: hot metal pretreatment for S removal, converter deep P removal, LF deep S removal, RH deep N and H removal; dynamic light reduction and electromagnetic stirring technology are adopted, and the center segregation of continuous casting billet is C0.5;
加热工序：铸坯入加热炉加热，加热系数11.5min/cm，加热温度1165℃，均热段保温时间47min，保证铸坯加热均匀性，特别是厚度1/2处温度的均匀性；Heating process: the slab is heated in a heating furnace with a heating coefficient of 11.5min/cm, a heating temperature of 1165°C, and a soaking time of 47 minutes in the soaking section to ensure the uniformity of heating of the slab, especially the uniformity of temperature at 1/2 of the thickness;
轧制工序：采用320mm大断面连铸坯，在低圧缩比条件下，采用2阶段控轧工艺，第一阶段轧制温度930℃，此阶段最后2道次压下率为29％、27％；第二阶段开轧温度为790℃，终轧温度为770℃；Rolling process: 320mm large cross-section continuous casting slab is used, under the condition of low pressure reduction ratio, two-stage controlled rolling process is adopted, the rolling temperature of the first stage is 930°C, and the reduction rate of the last two passes of this stage is 29% and 27% ;The rolling temperature of the second stage is 790°C and the final rolling temperature is 770°C;
冷却工序：轧制后的钢板入超快冷系统进行快速冷却，返红温度为626℃；然后进行堆垛缓冷，堆垛时间72小时及以上。Cooling process: the rolled steel plate is put into the ultra-fast cooling system for rapid cooling, and the red temperature is 626°C; then it is stacked and slowly cooled, and the stacking time is 72 hours or more.
力学性能为：屈服强度470MPa，抗拉强度580MPa，屈强比81％，断后伸长率29％，追加屈服强度455MPa，追加抗拉强度580MPa，追加屈强比78％，追加断后伸长率32％,-40℃横向厚度1/2处冲击功Akv：410J、421J、386J，Z向:67％、69％、68％，追加Z向:70％、69％、70％。The mechanical properties are: yield strength 470MPa, tensile strength 580MPa, yield ratio 81%, elongation after fracture 29%, additional yield strength 455MPa, additional tensile strength 580MPa, additional yield ratio 78%, and additional elongation after fracture 32 %, Impact energy Akv at 1/2 of transverse thickness at -40°C: 410J, 421J, 386J, Z direction: 67%, 69%, 68%, additional Z direction: 70%, 69%, 70%.
综上所述，本发明采用低碳、Nb、Ni、Cr复合添加的成分设计，使用320mm大断面连铸坯，采用连铸电磁搅拌和连铸坯C类偏析精准控制技术，TMCP工艺 过程中的粗轧大压下、低温控轧、轧后超快冷等技术，生产出低温韧性性能优良的API 2W-50Z产品。50mm和750mm厚规格API 2W-50Z钢板达到API-2W-2019标准性能要求，钢板组织为铁素体+珠光体+少量贝氏体组织，钢板厚度1/2处-40℃横向冲击韧性Akv≥300J，钢板厚度方向Z35性能≥60％；设计CEV≤0.38％，Pcm≤0.20％，钢板焊接性能更加优异。可实现钢板的经济、批量生产，满足海上各种复杂工况条件和恶劣自然环境下使用要求。To sum up, the present invention adopts low-carbon, Nb, Ni, and Cr composite added component design, uses 320mm large-section continuous casting slab, adopts continuous casting electromagnetic stirring and continuous casting slab C-type segregation precision control technology, TMCP process API 2W-50Z products with excellent low-temperature toughness are produced by advanced rough rolling and high-reduction technologies, low-temperature controlled rolling, and ultra-fast cooling after rolling. The 50mm and 750mm thick API 2W-50Z steel plates meet the performance requirements of the API-2W-2019 standard. The structure of the steel plate is ferrite + pearlite + a small amount of bainite structure. The transverse impact toughness at -40°C at 1/2 of the steel plate thickness is Akv≥ 300J, the Z35 performance in the thickness direction of the steel plate is ≥ 60%; the design CEV ≤ 0.38%, Pcm ≤ 0.20%, the steel plate welding performance is more excellent. It can realize economical and mass production of steel plates, and meet the requirements of various complex working conditions at sea and harsh natural environments.
除上述实施例外，本发明还可以有其他实施方式。凡采用等同替换或等效变换形成的技术方案，均落在本发明要求的保护范围。In addition to the above-mentioned embodiments, the present invention can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims (8)

  1. 一种海洋石油平台用API 2W-50钢板，其特征在于：其化学成分及重量百分比为：C：0.06％～0.08％，Mn：1.45％～1.55％，Si：0.15％～0.25％，P≤0.013％，S≤0.003％，Nb：0.020％～0.030％，V≤0.006％，Ti：0.007％～0.020％，Alt：0.025％～0.050％，Cr：0.13％～0.19％，Ni：0.30％～0.40％，Mo≤0.08％，Cu≤0.35％，N≤0.006％，H≤0.006％，CEV≤0.38％，Pcm≤0.20％，其余部分为Fe和杂质。An API 2W-50 steel plate for offshore oil platforms, characterized in that its chemical composition and weight percentage are: C: 0.06% to 0.08%, Mn: 1.45% to 1.55%, Si: 0.15% to 0.25%, P≤ 0.013%, S≤0.003%, Nb: 0.020%～0.030%, V≤0.006%, Ti: 0.007%～0.020%, Alt: 0.025%～0.050%, Cr: 0.13%～0.19%, Ni: 0.30%～ 0.40%, Mo≤0.08%, Cu≤0.35%, N≤0.006%, H≤0.006%, CEV≤0.38%, Pcm≤0.20%, and the rest is Fe and impurities.
  2. 根据权利要求1所述的一种海洋石油平台用API 2W-50钢板，其特征在于：其化学成分及重量百分比为：C：0.065％～0.075％，Mn：1.48％～1.52％，Si：0.18％～0.22％，P≤0.012％，S≤0.002％，Nb：0.022％～0.028％，V≤0.005％，Ti：0.010％～0.015％，Alt：0.025％～0.040％，Cr：0.13％～0.16％，Ni：0.30％～0.35％，Mo≤0.05％，Cu≤0.10％，N≤0.005％，H≤0.0002％，CEV≤0.37％，Pcm≤0.19％，其余部分为Fe和杂质。An API 2W-50 steel plate for offshore oil platforms according to claim 1, characterized in that its chemical composition and weight percentage are: C: 0.065%-0.075%, Mn: 1.48%-1.52%, Si: 0.18 %～0.22%, P≤0.012%, S≤0.002%, Nb: 0.022%～0.028%, V≤0.005%, Ti: 0.010%～0.015%, Alt: 0.025%～0.040%, Cr: 0.13%～0.16 %, Ni: 0.30% to 0.35%, Mo≤0.05%, Cu≤0.10%, N≤0.005%, H≤0.0002%, CEV≤0.37%, Pcm≤0.19%, and the rest is Fe and impurities.
  3. 根据权利要求1所述的一种海洋石油平台用API 2W-50钢板，其特征在于：其化学成分及重量百分比为：C：0.065％～0.080％，Mn：1.45％～1.52％，Si：0.15％～0.22％，P≤0.011％，S≤0.003％，Nb：0.025％～0.030％，V≤0.004％，Ti：0.007％～0.013％，Alt：0.030％～0.050％，Cr：0.13％～0.16％，Ni：0.32％～0.40％，Mo≤0.04％，Cu≤0.08％，N≤0.005％，H≤0.0002％，CEV≤0.38％，Pcm≤0.20％，其余部分为Fe和杂质。An API 2W-50 steel plate for offshore oil platforms according to claim 1, characterized in that its chemical composition and weight percentage are: C: 0.065%-0.080%, Mn: 1.45%-1.52%, Si: 0.15 %～0.22%, P≤0.011%, S≤0.003%, Nb: 0.025%～0.030%, V≤0.004%, Ti: 0.007%～0.013%, Alt: 0.030%～0.050%, Cr: 0.13%～0.16 %, Ni: 0.32% to 0.40%, Mo≤0.04%, Cu≤0.08%, N≤0.005%, H≤0.0002%, CEV≤0.38%, Pcm≤0.20%, and the rest is Fe and impurities.
  4. 一种海洋石油平台用API 2W-50钢板的生产方法，其特征在于：应用于权利要求1-3任意一项，不需要采用回火热处理工艺，包括以下步骤：A method for producing API 2W-50 steel plates for offshore oil platforms, characterized in that: it is applied to any one of claims 1-3 and does not need to adopt a tempering heat treatment process, comprising the following steps:
    炼钢工序：采用铁水预处理脱S、转炉深脱P、LF深脱S、RH深脱N、H；采用动态轻压下、电磁搅拌技术，连铸坯中心偏析C0.5级；Steelmaking process: hot metal pretreatment for S removal, converter deep P removal, LF deep S removal, RH deep N and H removal; dynamic light reduction and electromagnetic stirring technology are adopted, and the center segregation of continuous casting billet is C0.5;
    加热工序：铸坯入加热炉加热，加热系数≥10.0min/cm，加热温度1150～1180℃；Heating process: the billet is heated in a heating furnace, the heating coefficient is ≥10.0min/cm, and the heating temperature is 1150-1180°C;
    轧制工序：采用320mm大断面连铸坯，在压缩比＜4倍的低圧缩比条件下，采用2阶段控轧工艺，特别是第一阶段轧制温度在930～970℃之间，合理分配 轧制道次和道次压下率，即粗轧最后3道次压下率≥25％；Rolling process: 320mm large-section continuous casting slab is used, under the condition of low compression ratio < 4 times, two-stage controlled rolling process is adopted, especially the rolling temperature in the first stage is between 930-970°C, and the distribution is reasonable Rolling pass and pass reduction rate, that is, the reduction rate of the last three rough rolling passes is ≥ 25%;
    冷却工序：轧制后的钢板入超快冷系统进行快速冷却，然后进行堆垛缓冷，堆垛时间72小时及以上。Cooling process: the rolled steel plate is put into the ultra-fast cooling system for rapid cooling, and then stacked for slow cooling, and the stacking time is 72 hours or more.
  5. 根据权利要求4所述的一种海洋石油平台用API 2W-50钢板的生产方法，其特征在于：轧制工序中，50mm规格第二阶段的开轧温度≤860℃，75mm规格第二阶段的开轧温度≤830℃。A method for producing API 2W-50 steel plates for offshore oil platforms according to claim 4, characterized in that: in the rolling process, the rolling start temperature of the second stage of the 50mm specification is ≤860°C, and the second stage of the 75mm specification The rolling start temperature is ≤830℃.
  6. 根据权利要求4所述的一种海洋石油平台用API 2W-50钢板的生产方法，其特征在于：冷却工序中，50、75mm规格返红温度620℃～670℃。A method for producing API 2W-50 steel plates for offshore oil platforms according to claim 4, characterized in that: in the cooling process, the red-return temperature of 50 and 75mm specifications is 620°C to 670°C.
  7. 根据权利要求4所述的一种海洋石油平台用API 2W-50钢板的生产方法，其特征在于：生产的钢板厚度为50-75mm。A method for producing API 2W-50 steel plates for offshore oil platforms according to claim 4, characterized in that: the produced steel plates have a thickness of 50-75mm.
  8. 根据权利要求4所述的一种海洋石油平台用API 2W-50钢板的生产方法，其特征在于：生产的钢板组织为铁素体+珠光体+少量贝氏体组织。A method for producing API 2W-50 steel plates for offshore oil platforms according to claim 4, characterized in that: the microstructure of the produced steel plate is ferrite + pearlite + a small amount of bainite.
PCT/CN2021/108095 2021-05-14 2021-07-23 Api 2w-50 steel plate for offshore oil platform, and production method therefor WO2022236961A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110526569.1 2021-05-14
CN202110526569.1A CN113355608A (en) 2021-05-14 2021-05-14 API 2W-50 steel plate for offshore oil platform and production method thereof

Publications (1)

Publication Number Publication Date
WO2022236961A1 true WO2022236961A1 (en) 2022-11-17

Family

ID=77526709

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/108095 WO2022236961A1 (en) 2021-05-14 2021-07-23 Api 2w-50 steel plate for offshore oil platform, and production method therefor

Country Status (2)

Country Link
CN (1) CN113355608A (en)
WO (1) WO2022236961A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114892082A (en) * 2022-04-28 2022-08-12 湖南华菱湘潭钢铁有限公司 Large-thickness 460 MPa-grade steel plate for ocean engineering and production method thereof
CN115807192A (en) * 2022-12-12 2023-03-17 湖南华菱湘潭钢铁有限公司 Low-carbon 420 MPa-level TMCP structural steel and production method thereof
CN116770198B (en) * 2023-08-25 2023-11-03 张家港宏昌钢板有限公司 Steel plate for low-compression-ratio hydropower and preparation method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002129281A (en) * 2000-10-23 2002-05-09 Nippon Steel Corp High tensile strength steel for welding structure excellent in fatigue resistance in weld zone and its production method
JP2008007834A (en) * 2006-06-30 2008-01-17 Jfe Steel Kk Manufacturing method of steel material superior in fatigue crack propagation resistance
CN101358320A (en) * 2008-09-02 2009-02-04 首钢总公司 Steel for controlled rolling and controlled cooling platform and production method thereof
CN108085604A (en) * 2017-11-29 2018-05-29 南京钢铁股份有限公司 Ocean engineering low-temperature flexibility S355G10+M Wide and Heavy Plates and its production method
CN108374122A (en) * 2018-03-26 2018-08-07 南京钢铁股份有限公司 A kind of solderable structure in sea S460G2+M steel plates and its production method
CN111850414A (en) * 2020-05-22 2020-10-30 南京钢铁股份有限公司 S460ML super-thick steel plate and production method thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6228491B2 (en) * 2013-08-26 2017-11-08 株式会社神戸製鋼所 Thick steel plate with excellent fatigue characteristics and method for producing the same
CN109628853A (en) * 2019-01-03 2019-04-16 南京钢铁股份有限公司 A kind of ocean engineering S355G10 super-thick steel plate and manufacturing method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002129281A (en) * 2000-10-23 2002-05-09 Nippon Steel Corp High tensile strength steel for welding structure excellent in fatigue resistance in weld zone and its production method
JP2008007834A (en) * 2006-06-30 2008-01-17 Jfe Steel Kk Manufacturing method of steel material superior in fatigue crack propagation resistance
CN101358320A (en) * 2008-09-02 2009-02-04 首钢总公司 Steel for controlled rolling and controlled cooling platform and production method thereof
CN108085604A (en) * 2017-11-29 2018-05-29 南京钢铁股份有限公司 Ocean engineering low-temperature flexibility S355G10+M Wide and Heavy Plates and its production method
CN108374122A (en) * 2018-03-26 2018-08-07 南京钢铁股份有限公司 A kind of solderable structure in sea S460G2+M steel plates and its production method
CN111850414A (en) * 2020-05-22 2020-10-30 南京钢铁股份有限公司 S460ML super-thick steel plate and production method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS: "Specification for Steel Plates for Offshore Structures, Produced by Thermo-Mechanical Control Processing (TMCP)", API PUBLISHING SERVICES, 30 June 2007 (2007-06-30), XP093004474, Retrieved from the Internet <URL:http://steelguang.com/data/upload/file/201710/0a431938e5bf3b8478ab217ec3b0b67e.pdf> [retrieved on 20221202] *

Also Published As

Publication number Publication date
CN113355608A (en) 2021-09-07

Similar Documents

Publication Publication Date Title
EP3611287A1 (en) S355g10+m wide and heavy steel plate having low-temperature toughness for ocean engineering, and method for manufacturing same
CN108374122B (en) S460G2+ M steel plate for offshore weldable structure and production method thereof
WO2022236961A1 (en) Api 2w-50 steel plate for offshore oil platform, and production method therefor
CN112877601B (en) Marine steel plate with excellent low-temperature toughness and low yield ratio and manufacturing method thereof
CN108486492B (en) 1200 MPa-grade high-strength high-plasticity low-density steel plate and manufacturing method thereof
WO2019218657A1 (en) Yield strength 460 mpa grade hot-rolled high-toughness low-temperature-resistant h-beam and preparation method therefor
WO2020140442A1 (en) S355g10 super-thick steel plate for ocean engineering and manufacturing method
CN103103458A (en) High strength weathering resistant steel and preparation method
WO2017219549A1 (en) 250 mm thick low-carbon high-toughness low-alloy s355nl steel plate, and manufacturing method therefor
WO2014201877A1 (en) Zinc-induced-crack resistant steel plate and manufacturing method therefor
CN111455272A (en) Hot-rolled high-strength S500M L steel plate and production method thereof
CN100523252C (en) Soldering boat deck steel in high intensity by large line energy, and manufacturing method
CN107988562A (en) A kind of X65 grades inexpensive submerged pipeline steel and its manufacture method
WO2022022040A1 (en) Low temperature-resistant hot-rolled h-type steel for 355mpa marine engineering and preparation method therefor
CN111850414A (en) S460ML super-thick steel plate and production method thereof
WO2024027526A1 (en) Extra-thick q500qe bridge steel plate and production method therefor
KR20230172017A (en) Corrosion-resistant high-strength steel plate for marine engineering capable of high heat input welding and method of manufacturing the same
CN100523254C (en) Soldering not quenching and tempering steel plate in high intensity by large line energy, and manufacturing method
CN109423572B (en) Seawater corrosion resistant steel plate with high crack arrest and strain aging embrittlement resistance and manufacturing method thereof
CN107557690A (en) The super-thick steel plate and its manufacture method of a kind of low temperature resistant and anti-lamellar tearing
CN110029268B (en) 09MnNiDR steel plate for low-temperature pressure vessel with core low-temperature toughness protection and manufacturing method thereof
CN110184534B (en) 100-150 mm thick super-thick steel plate with excellent performance after die welding treatment and production method thereof
CN113388785B (en) Acid-resistant pipeline steel plate and preparation method thereof
CN107058898A (en) A kind of Q690D low-carbon bainite steels and its production method
CN101660094B (en) Large-linear energy welding low-alloy high-strength steel plate and manufacturing method thereof

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21941530

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE