WO2014088454A1 - Acier structurel faiblement dopé ayant une plus grande résistance - Google Patents

Acier structurel faiblement dopé ayant une plus grande résistance Download PDF

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Publication number
WO2014088454A1
WO2014088454A1 PCT/RU2013/000485 RU2013000485W WO2014088454A1 WO 2014088454 A1 WO2014088454 A1 WO 2014088454A1 RU 2013000485 W RU2013000485 W RU 2013000485W WO 2014088454 A1 WO2014088454 A1 WO 2014088454A1
Authority
WO
WIPO (PCT)
Prior art keywords
mass
steel
carbon
increased
manganese
Prior art date
Application number
PCT/RU2013/000485
Other languages
English (en)
Russian (ru)
Inventor
Александр Дмитриевич ВОЛОСКОВ
Original Assignee
Закрытое акционерное общество "Омутнинский металлургический завод"
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 Закрытое акционерное общество "Омутнинский металлургический завод" filed Critical Закрытое акционерное общество "Омутнинский металлургический завод"
Priority to EP13861471.4A priority Critical patent/EP2803749A4/fr
Priority to CN201380027375.0A priority patent/CN104471098B/zh
Publication of WO2014088454A1 publication Critical patent/WO2014088454A1/fr

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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • 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 ferrous metallurgy, namely to the production of steel with increased strength for the manufacture of hot-rolled automotive components.
  • This steel is the closest to the proposed mechanical properties, composition and purpose and is taken as a prototype.
  • DIN EN 10025-2: 2005 contains the upper limits of the chemical composition and the obligatory list of elements, but does not indicate the specific limits of their content and additional elements to obtain the required mechanical properties according to DIN and special customer requirements corresponding to operating conditions.
  • the main technical objective of the invention is to obtain steel with a high yield strength, with an increased ductility index, an increased index of impact work, the ability to be used at low temperatures, with good weldability, increased machinability, while maintaining a strength interval that is economically feasible in use due to the use of non-deficient alloying elements.
  • the carbon and manganese content provides a predetermined interval of tensile strength (470-630 MPa) and increased ductility (elongation) of at least 20% (instead of at least 16%).
  • the necessary and sufficient content of vanadium as an element binding nitrogen provides carbonitride hardening in the process of ⁇ - and transformation by the dispersion hardening mechanism due to which there is an increase in the yield strength of the material not less than 400 MPa.
  • the increased yield strength allows to reduce the metal consumption in operation and allows to obtain an indicator of impact at a temperature from 0 ° C to -40 ° C of at least 80 J.
  • the increased sulfur content leads to improved machinability of steel by cutting.
  • the figure 1 presents a photograph of the microstructure of a sample of a hot-rolled profile of a modified steel of one of the melts with a grain size of 8 number according to ASTM E 112 (according to GOST 5639) at 100-fold magnification with an installed scale bar 400 microns long.
  • Smelting of the declared steel grade is carried out at CJSC Omutninsky Metallurgical Plant in a steelmaking unit.
  • steel of the main composition is smelted, containing carbon, manganese, silicon, iron and inevitable impurities; after heating to 1620-1640 ° C, it is released into a steel pouring ladle.
  • Deoxidation of steel by aluminum is carried out at a drain from the steelmaking unit into the ladle, components for deoxidation are introduced into the bottom zone of the ladle at the optimal ratio [Mn] / [Si] ⁇ 3.
  • a sufficiently deep deoxidation of steel by secondary aluminum is carried out to obtain optimal conditions for the ascent of the formed large aluminum oxides. Additionally, oxygen is controlled (not more than 0.001% on the proposed steel grade).
  • furnace slag is removed from the steel pouring ladle.
  • lime-alumina slag is induced by additives of lime and aluminum-containing material. Get branded content of the basic elements (carbon, manganese, silicon) and deoxidated refining "white" slag.
  • Vanadium is introduced in the form of lumpy ferroalloy to achieve the target concentration. Then the metal is heated to a temperature guaranteeing a predetermined overheating of the metal above the liquidus temperature of the steel in the intermediate ladle during casting at the continuous casting machine, taking into account the existing heat losses and subsequent alloying with sulfur. Sulfur is introduced into steel by flux-cored wire using a tribamer after thickening the slag with magnesite powder.
  • Casting in the continuous casting machine is carried out with the protection of the metal from secondary oxidation in a "under the level” way. Exposure of the metal surface in the bucket (sparking) is not allowed.
  • the billet is rolled in hot rolling mills according to technological instructions and rolling schemes of OMZ CJSC. Get a hot-rolled profile for the manufacture of the door hinge of a Volkswagen car.
  • the proposed chemical composition allows to obtain steel with a high yield strength, with an increased ductility index, good weldability, increased machinability, reduced tendency to mechanical aging, the possibility of use at low temperatures, the possibility of eliminating additional heat treatment, while maintaining an interval of strength that is economically feasible in use due to the use of non-deficient alloying elements in the manufacture of hot-rolled cars beat components.

Landscapes

  • 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)
  • Treatment Of Steel In Its Molten State (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

L'invention se rapporte au domaine de la métallurgie du fer et concerne notamment la production d'acier d'une plus grande résistance utilisé dans la fabrication de composants automobiles laminés à chaud. Cet acier possède la composition suivante en % en poids : carbone : 0,15-0,20 ; manganèse : 1,3-1,5; silicium : 0,05-0,45; phosphore : pas plus de 0,02; soufre : 0,02-0,05; cuivre : pas plus de 0,25; vanadium : 0,03-0,055; azote : 0,004-0,015 ; le reste se composant de fer et d'impuretés. Le résultat technique de l'invention consiste en l'obtention de produits laminés à chaud ayant une limite de fluidité plus élevée, un indice de plasticité élevé, une bonne aptitude à la soudure, une meilleure aptitude à l'usinage, une propension réduite au vieillissement mécanique, la capacité de les utiliser à des températures négatives, la possibilité d'exclure tout traitement thermique ultérieur, tout en conservant la plage de résistance et en restant économiquement viable dans des applications visant à utiliser des éléments de dopages ne faisant pas défauts.
PCT/RU2013/000485 2012-12-04 2013-06-11 Acier structurel faiblement dopé ayant une plus grande résistance WO2014088454A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13861471.4A EP2803749A4 (fr) 2012-12-04 2013-06-11 Acier structurel faiblement dopé ayant une plus grande résistance
CN201380027375.0A CN104471098B (zh) 2012-12-04 2013-06-11 低合金高强度结构钢

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2012152045/02A RU2505618C1 (ru) 2012-12-04 2012-12-04 Низколегированная конструкционная сталь с повышенной прочностью
RU2012152045 2012-12-04

Publications (1)

Publication Number Publication Date
WO2014088454A1 true WO2014088454A1 (fr) 2014-06-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2013/000485 WO2014088454A1 (fr) 2012-12-04 2013-06-11 Acier structurel faiblement dopé ayant une plus grande résistance

Country Status (4)

Country Link
EP (1) EP2803749A4 (fr)
CN (1) CN104471098B (fr)
RU (1) RU2505618C1 (fr)
WO (1) WO2014088454A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN110714172A (zh) * 2019-10-15 2020-01-21 石家庄钢铁有限责任公司 一种纵横向冲击韧性良好的大规格建筑用圆钢及生产方法
CN111187986A (zh) * 2020-02-18 2020-05-22 山东钢铁股份有限公司 一种高强钢筋连接用低合金高强度套筒及制备方法

Citations (4)

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EP1191114A1 (fr) * 2000-02-23 2002-03-27 Kawasaki Steel Corporation Feuille d'acier resistant a une traction elevee, laminee a chaud et dotee d'excellentes proprietes de resistance au durcissement, au vieillissement et a la deformation et procede de fabrication associe
EP1146132B1 (fr) * 1999-10-22 2007-02-21 JFE Steel Corporation Tole d'acier galvanisee par immersion a chaud presentant de bonnes qualites de resistance, de formabilite et de galvanisation
RU2330893C2 (ru) * 2006-08-30 2008-08-10 Открытое акционерное общество "Оскольский электрометаллургический комбинат" Трубная заготовка из низколегированной стали
RU2339705C2 (ru) * 2006-09-19 2008-11-27 Открытое акционерное общество "Оскольский электрометаллургический комбинат" Сортовой прокат из низкоуглеродистой хромсодержащей стали для холодного выдавливания

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AR046543A1 (es) * 2003-10-10 2005-12-14 Tenaris Connections A G Tubo de acero con bajo contenido de carbono, y metodo de fabricacion del mismo
RU2330895C2 (ru) * 2006-08-30 2008-08-10 Открытое акционерное общество "Оскольский электрометаллургический комбинат" Трубная заготовка из низкоуглеродистой микролегированной стали
CN101509097A (zh) * 2009-03-23 2009-08-19 唐山钢铁股份有限公司 一种q460级低合金高强度角钢及生产工艺
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EP1146132B1 (fr) * 1999-10-22 2007-02-21 JFE Steel Corporation Tole d'acier galvanisee par immersion a chaud presentant de bonnes qualites de resistance, de formabilite et de galvanisation
EP1191114A1 (fr) * 2000-02-23 2002-03-27 Kawasaki Steel Corporation Feuille d'acier resistant a une traction elevee, laminee a chaud et dotee d'excellentes proprietes de resistance au durcissement, au vieillissement et a la deformation et procede de fabrication associe
RU2330893C2 (ru) * 2006-08-30 2008-08-10 Открытое акционерное общество "Оскольский электрометаллургический комбинат" Трубная заготовка из низколегированной стали
RU2339705C2 (ru) * 2006-09-19 2008-11-27 Открытое акционерное общество "Оскольский электрометаллургический комбинат" Сортовой прокат из низкоуглеродистой хромсодержащей стали для холодного выдавливания

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Also Published As

Publication number Publication date
EP2803749A4 (fr) 2015-05-06
RU2505618C1 (ru) 2014-01-27
CN104471098A (zh) 2015-03-25
EP2803749A1 (fr) 2014-11-19
CN104471098B (zh) 2017-11-07

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