WO2021047295A1 - Procédé de production d'une ébauche en acier de construction à plusieurs étages pour un acier - Google Patents

Procédé de production d'une ébauche en acier de construction à plusieurs étages pour un acier Download PDF

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WO2021047295A1
WO2021047295A1 PCT/CN2020/103544 CN2020103544W WO2021047295A1 WO 2021047295 A1 WO2021047295 A1 WO 2021047295A1 CN 2020103544 W CN2020103544 W CN 2020103544W WO 2021047295 A1 WO2021047295 A1 WO 2021047295A1
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steel
smelting
structural steel
requirements
composition
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PCT/CN2020/103544
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English (en)
Chinese (zh)
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翟冬雨
洪君
吴俊平
方磊
姜金星
杜海军
刘帅
陈飞
刘汝营
张臣臣
严生平
丁叶
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南京钢铁股份有限公司
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Priority to EP20863199.4A priority Critical patent/EP4015666A4/fr
Publication of WO2021047295A1 publication Critical patent/WO2021047295A1/fr

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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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • 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
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/18—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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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

Definitions

  • the invention relates to the technical field of steel smelting, in particular to a method for producing multi-level structural steel billets for one steel.
  • Structural steel is the most widely used and the largest amount of production used by steel companies in the plate manufacturing process. Due to too many types of smelting, structural steel restricts the improvement of production efficiency of the company, and at the same time generates a large backlog of billets, which seriously affects the capital turnover of the company .
  • structural steel there are 115 types of structural steel in the enterprise, 50 of which are 345 grades.
  • each steel type requires a production process, and there is a casting sequence between the steel type and the steel type. Not only is the pressure of the production group steel very high, the continuous casting section is generally degraded and used, and the waste is serious, which restricts the development of productivity to a certain extent.
  • the present invention provides a method for producing multi-level structural steel billets for one steel, including
  • the smelting process is designed according to the order flaw detection requirements.
  • the smelting process of the flaw detection steel grade is: molten iron desulfurization ⁇ BOF smelting ⁇ LF refining ⁇ RH vacuum treatment ⁇ CCM casting, and the smelting process of non-detection steel grades is: molten iron desulfurization ⁇ BOF smelting ⁇ LF refining ⁇ CCM casting;
  • the production plan is based on the product order quantity and delivery time requirements for production scheduling
  • the remaining billet After smelting, the remaining billet shall be managed by the remaining billet, and it shall be preferentially used for subsequent order production.
  • the present invention uniformly adopts peritectic and medium carbon steel composition design, and at the same time uses C, Mn, Cr, Ni, Mo, Cu, V and other elements for carbon equivalent according to product requirements Adjust to meet product performance requirements, product performance is more stable, production scheduling is faster and smoother, and the remaining blank volume is significantly reduced.
  • the aforementioned method for producing multi-level structural steel billets for one steel includes
  • composition requirements of steel plate Q235GJ for building structure in the national standard GB/T 19799 are: C ⁇ 0.18%, Mn: 0.60% ⁇ 1.50%, Si ⁇ 0.35%, P ⁇ 0.020%, S ⁇ 0.010%, Al ⁇ 0.020% , Ni ⁇ 0.30%, Cr ⁇ 0.30%, Mo ⁇ 0.08%, Cu ⁇ 0.30%;
  • composition requirements of structural steel plate Q235FT for wind power towers in the national standard GB/T 28410 are: C ⁇ 0.18%, Mn: 0.50% ⁇ 1.40%, Si ⁇ 0.50%, P ⁇ 0.025%, S ⁇ 0.020%, Al ⁇ 0.015%, Nb ⁇ 0.050%, V ⁇ 0.060%, Ti ⁇ 0.050%, Ni ⁇ 0.30%, Cr ⁇ 0.30%, Mo ⁇ 0.10%, Cu ⁇ 0.30%, N ⁇ 0.012%;
  • composition requirements of the structural steel plate Q235q for bridges in the national standard GB/T 714 are: C ⁇ 0.17%, Mn ⁇ 1.40%, Si ⁇ 0.35%, P ⁇ 0.020%, S ⁇ 0.010%, Al ⁇ 0.015%, Ni ⁇ 0.30%, Cr ⁇ 0.30%, Cu ⁇ 0.30%, N ⁇ 0.012%;
  • the unified smelting grade J-1 is formulated for the above three grades of structural steel plates under the same rolling and heat treatment conditions.
  • the composition design is: C: 0.15% to 0.17%, Mn: 0.90% ⁇ 1.10%, Si: 0.20% ⁇ 0.30%, P ⁇ 0.015%, S ⁇ 0.005%, Nb ⁇ 0.020%, Al: 0.020% ⁇ 0.050%, N ⁇ 0.012%, V ⁇ 0.030%, Ni ⁇ 0.030 %, Cr ⁇ 0.050%, Mo ⁇ 0.030%, Cu ⁇ 0.050%, Ti: 0.006% ⁇ 0.020%, B ⁇ 0.0005%, Ca: 0.0008% ⁇ 0.00400%, Ceq: 0.26% ⁇ 0.33%;
  • the smelting process is designed according to the order flaw detection requirements.
  • the smelting process of the flaw detection steel grade is: molten iron desulfurization ⁇ BOF smelting ⁇ LF refining ⁇ RH vacuum treatment ⁇ CCM casting, and the smelting process of non-detection steel grades is: molten iron desulfurization ⁇ BOF smelting ⁇ LF refining ⁇ CCM casting;
  • the production plan is based on the product order quantity and delivery time requirements for production scheduling
  • the remaining billet After smelting, the remaining billet shall be managed by the remaining billet, and it shall be preferentially used for subsequent order production.
  • the aforementioned method for producing multi-level structural steel billets for one steel includes
  • composition requirements of steel plate Q420GJ for building structure in the national standard GB/T 19799 are: C ⁇ 0.18%, Mn ⁇ 1.70%, Si ⁇ 0.55%, P ⁇ 0.020%, S ⁇ 0.010%, Nb ⁇ 0.070%, V ⁇ 0.20%, Ti ⁇ 0.030%, Al ⁇ 0.020%, Ni ⁇ 1.0%, Cr ⁇ 0.80%, Mo ⁇ 0.50%, Cu ⁇ 0.30%;
  • composition requirements of the structural steel plate Q420FT for wind power towers in the national standard GB/T 28410 are: C ⁇ 0.20%, Mn: 1.00% ⁇ 1.70%, Si ⁇ 0.50%, P ⁇ 0.020%, S ⁇ 0.010%, Al ⁇ 0.015%, Nb ⁇ 0.060%, V ⁇ 0.15%, Ti ⁇ 0.050%, Ni ⁇ 0.50%, Cr ⁇ 0.30%, Mo ⁇ 0.20%, Cu ⁇ 0.30%, N ⁇ 0.010%;
  • composition requirements of the structural steel plate Q420q for bridges in the national standard GB/T 714 are: C ⁇ 0.18%, Mn: 1.00% ⁇ 1.70%, Si ⁇ 0.55%, P ⁇ 0.020%, S ⁇ 0.010%, Nb ⁇ 0.060% , V ⁇ 0.08%, Ti ⁇ 0.030%, Al ⁇ 0.015%, Ni ⁇ 0.70%, Cr ⁇ 0.80%, Mo ⁇ 0.35%, Cu ⁇ 0.55%, B ⁇ 0.0040%, N ⁇ 0.012%;
  • composition requirements for low-alloy high-strength structural steel plate Q420 in the national standard GB/T 1591 are: C ⁇ 0.20%, Mn ⁇ 1.70%, Si ⁇ 0.50%, P ⁇ 0.025%, S ⁇ 0.020%, Al ⁇ 0.015%, Nb ⁇ 0.070%, V ⁇ 0.20%, Ti ⁇ 0.20%, Ni ⁇ 0.80%, Cr ⁇ 0.30%, Mo ⁇ 0.20%, Cu ⁇ 0.30%, N ⁇ 0.015%;
  • the uniform smelting grade J-19 is formulated for the above four grades of structural steel plates under the condition of the same rolling and heat treatment, and the composition design is: C: 0.060% ⁇ 0.080%, Mn: 1.30% ⁇ 1.50%, Si: 0.20% ⁇ 0.40%, P ⁇ 0.020%, S ⁇ 0.005%, Nb: 0.020% ⁇ 0.030%, V: 0.020% ⁇ 0.040%, Ti: 0.010% ⁇ 0.020%, Al: 0.020% ⁇ 0.050%, N ⁇ 0.0080%, Ni ⁇ 0.30%, Cr: 0.20% ⁇ 0.30%, Mo ⁇ 0.03%, Cu ⁇ 0.05%, B ⁇ 0.0010%, Ca: 0.0008% ⁇ 0.00400%, Ceq :0.36% ⁇ 0.46%;
  • the smelting process is designed according to the order flaw detection requirements.
  • the smelting process of the flaw detection steel grade is: molten iron desulfurization ⁇ BOF smelting ⁇ LF refining ⁇ RH vacuum treatment ⁇ CCM casting, and the smelting process of non-detection steel grades is: molten iron desulfurization ⁇ BOF smelting ⁇ LF refining ⁇ CCM casting;
  • the production plan is based on the product order quantity and delivery time requirements for production scheduling
  • the remaining billet After smelting, the remaining billet shall be managed by the remaining billet, and it shall be preferentially used for subsequent order production.
  • the present invention breaks the limitation of varieties, series and groups, formulates reasonable and unified smelting grades based on product performance and customer requirements, produces structural steel billets that meet multiple uses, and solves the problem of scattered orders that are not conducive to delivery. , The backlog of billets is not conducive to digestion of the disadvantages, which improves the operating rate of the continuous caster and the crude steel output of the enterprise, thereby improving the economic benefits of the enterprise;
  • the present invention reduces the number of structural steel types from the previous 115 to 65, optimizes the variety structure, reduces smelting costs, improves the market competitiveness of sheet products, and expands the market share of advantageous varieties;
  • the smelting and manufacturing standards are more unified, the smelting operation is more orderly, and the production quality is steadily improved;
  • the present invention improves the ability of an enterprise to accept orders of different varieties, shortens the delivery cycle of scattered orders, and improves customer satisfaction, which not only improves the economic benefits of the enterprise, but also improves the competitiveness of the enterprise.
  • the present embodiment provides a method for producing multi-level structural steel blanks for one steel, including:
  • composition requirements of steel plate Q235GJ for building structure in the national standard GB/T 19799 are: C ⁇ 0.18%, Mn: 0.60% ⁇ 1.50%, Si ⁇ 0.35%, P ⁇ 0.020%, S ⁇ 0.010%, Al ⁇ 0.020% , Ni ⁇ 0.30%, Cr ⁇ 0.30%, Mo ⁇ 0.08%, Cu ⁇ 0.30%;
  • composition requirements of structural steel plate Q235FT for wind power towers in the national standard GB/T 28410 are: C ⁇ 0.18%, Mn: 0.50% ⁇ 1.40%, Si ⁇ 0.50%, P ⁇ 0.025%, S ⁇ 0.020%, Al ⁇ 0.015%, Nb ⁇ 0.050%, V ⁇ 0.060%, Ti ⁇ 0.050%, Ni ⁇ 0.30%, Cr ⁇ 0.30%, Mo ⁇ 0.10%, Cu ⁇ 0.30%, N ⁇ 0.012%;
  • composition requirements of the structural steel plate Q235q for bridges in the national standard GB/T 714 are: C ⁇ 0.17%, Mn ⁇ 1.40%, Si ⁇ 0.35%, P ⁇ 0.020%, S ⁇ 0.010%, Al ⁇ 0.015%, Ni ⁇ 0.30%, Cr ⁇ 0.30%, Cu ⁇ 0.30%, N ⁇ 0.012%;
  • the unified smelting grade J-1 is formulated for the above three grades of structural steel plates under the same rolling and heat treatment conditions.
  • the composition design is: C: 0.15% to 0.17%, Mn: 0.90% ⁇ 1.10%, Si: 0.20% ⁇ 0.30%, P ⁇ 0.015%, S ⁇ 0.005%, Nb ⁇ 0.020%, Al: 0.020% ⁇ 0.050%, N ⁇ 0.012%, V ⁇ 0.030%, Ni ⁇ 0.030 %, Cr ⁇ 0.050%, Mo ⁇ 0.030%, Cu ⁇ 0.050%, Ti: 0.006% ⁇ 0.020%, B ⁇ 0.0005%, Ca: 0.0008% ⁇ 0.00400%, Ceq: 0.26% ⁇ 0.33%;
  • the smelting process is designed according to the order flaw detection requirements.
  • the smelting process of the flaw detection steel grade is: molten iron desulfurization ⁇ BOF smelting ⁇ LF refining ⁇ RH vacuum treatment ⁇ CCM casting, and the smelting process of non-detection steel grades is: molten iron desulfurization ⁇ BOF smelting ⁇ LF refining ⁇ CCM casting;
  • the production plan is based on the product order quantity and delivery time requirements for production scheduling
  • the remaining billet After smelting, the remaining billet shall be managed by the remaining billet, and it shall be preferentially used for subsequent order production.
  • the present embodiment provides a method for producing multi-level structural steel blanks for one steel, including:
  • composition requirements of steel plate Q420GJ for building structure in the national standard GB/T 19799 are: C ⁇ 0.18%, Mn ⁇ 1.70%, Si ⁇ 0.55%, P ⁇ 0.020%, S ⁇ 0.010%, Nb ⁇ 0.070%, V ⁇ 0.20%, Ti ⁇ 0.030%, Al ⁇ 0.020%, Ni ⁇ 1.0%, Cr ⁇ 0.80%, Mo ⁇ 0.50%, Cu ⁇ 0.30%;
  • composition requirements of the structural steel plate Q420FT for wind power towers in the national standard GB/T 28410 are: C ⁇ 0.20%, Mn: 1.00% ⁇ 1.70%, Si ⁇ 0.50%, P ⁇ 0.020%, S ⁇ 0.010%, Al ⁇ 0.015%, Nb ⁇ 0.060%, V ⁇ 0.15%, Ti ⁇ 0.050%, Ni ⁇ 0.50%, Cr ⁇ 0.30%, Mo ⁇ 0.20%, Cu ⁇ 0.30%, N ⁇ 0.010%;
  • composition requirements of the structural steel plate Q420q for bridges in the national standard GB/T 714 are: C ⁇ 0.18%, Mn: 1.00% ⁇ 1.70%, Si ⁇ 0.55%, P ⁇ 0.020%, S ⁇ 0.010%, Nb ⁇ 0.060% , V ⁇ 0.08%, Ti ⁇ 0.030%, Al ⁇ 0.015%, Ni ⁇ 0.70%, Cr ⁇ 0.80%, Mo ⁇ 0.35%, Cu ⁇ 0.55%, B ⁇ 0.0040%, N ⁇ 0.012%;
  • composition requirements for low-alloy high-strength structural steel plate Q420 in the national standard GB/T 1591 are: C ⁇ 0.20%, Mn ⁇ 1.70%, Si ⁇ 0.50%, P ⁇ 0.025%, S ⁇ 0.020%, Al ⁇ 0.015%, Nb ⁇ 0.070%, V ⁇ 0.20%, Ti ⁇ 0.20%, Ni ⁇ 0.80%, Cr ⁇ 0.30%, Mo ⁇ 0.20%, Cu ⁇ 0.30%, N ⁇ 0.015%;
  • the uniform smelting grade J-19 is formulated for the above four grades of structural steel plates under the condition of the same rolling and heat treatment, and the composition design is: C: 0.060% ⁇ 0.080%, Mn: 1.30% ⁇ 1.50%, Si: 0.20% ⁇ 0.40%, P ⁇ 0.020%, S ⁇ 0.005%, Nb: 0.020% ⁇ 0.030%, V: 0.020% ⁇ 0.040%, Ti: 0.010% ⁇ 0.020%, Al: 0.020% ⁇ 0.050%, N ⁇ 0.0080%, Ni ⁇ 0.30%, Cr: 0.20% ⁇ 0.30%, Mo ⁇ 0.03%, Cu ⁇ 0.05%, B ⁇ 0.0010%, Ca: 0.0008% ⁇ 0.00400%, Ceq :0.36% ⁇ 0.46%;
  • the smelting process is designed according to the order flaw detection requirements.
  • the smelting process of the flaw detection steel grade is: molten iron desulfurization ⁇ BOF smelting ⁇ LF refining ⁇ RH vacuum treatment ⁇ CCM casting, and the smelting process of non-detection steel grades is: molten iron desulfurization ⁇ BOF smelting ⁇ LF refining ⁇ CCM casting;
  • the production plan is based on the product order quantity and delivery time requirements for production scheduling
  • the remaining billet After smelting, the remaining billet shall be managed by the remaining billet, and it shall be preferentially used for subsequent order production.
  • peritectic and medium-carbon steel composition design is uniformly adopted.
  • C, Mn, Cr, Ni, Mo, Cu, V and other elements are used to adjust carbon equivalent according to product requirements to meet product requirements.
  • Mechanical performance requirements, product performance is more stable, production scheduling is faster and smoother, and the remaining blank volume is significantly reduced.
  • the number of structural steel grades has been reduced from 115 to 65.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

L'invention concerne un procédé de production d'une ébauche en acier de construction à plusieurs étages pour un acier, qui se rapporte au domaine technique de la fusion de l'acier, l'acier de construction étant conçu par l'adoption d'un système de composants péritectiques et demi-durs au carbone à 0,08 % ≤ C ＜ 0,22 %, en ajustant d'autres alliages sur cette base pour satisfaire aux exigences de performance des produits. Selon les normes de fabrication et les spécifications d'une commande, en combinaison avec des exigences de performance de produit, réalisation d'une conception de composant unifiée pour la construction d'acier de construction, d'acier de tour éolienne, d'acier de construction de pont et d'acier de construction hautement résistant faiblement allié selon les stades de l'acier, et formulation de codes de fusion. Selon des normes de fabrication d'acier de construction et des exigences de performance mécanique de produit, la conception de composants en acier péritectique et semi-dur au carbone est adoptée de manière uniforme, en même temps, C, Mn, Cr, Ni, Mo, Cu, V et d'autres éléments sont utilisés pour ajuster un équivalent carbone selon des exigences de produit, pour satisfaire aux exigences de performance de produit, de sorte que la performance de produit est plus stable, la planification de production est plus rapide et plus régulière, et le volume d'ébauche restant est significativement réduit.
PCT/CN2020/103544 2019-09-10 2020-07-22 Procédé de production d'une ébauche en acier de construction à plusieurs étages pour un acier WO2021047295A1 (fr)

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Cited By (1)

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CN114369753A (zh) * 2022-01-07 2022-04-19 鞍钢股份有限公司 一种基于柔性轧制技术生产多强度级别合金结构钢的方法

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Publication number Priority date Publication date Assignee Title
CN110656285A (zh) * 2019-09-10 2020-01-07 南京钢铁股份有限公司 一种一钢多级用结构钢坯料生产方法
CN112795834B (zh) * 2020-11-19 2021-12-03 唐山钢铁集团有限责任公司 一种中碳中硅高铝双相钢连铸坯的生产方法
CN113528939A (zh) * 2021-06-10 2021-10-22 江苏利淮钢铁有限公司 一种高性能汽车转向系统中横拉杆接头用钢

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