WO2016010456A1 - Acier structurel faiblement dopé ayant une meilleure aptitude à l'usinage - Google Patents

Acier structurel faiblement dopé ayant une meilleure aptitude à l'usinage Download PDF

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Publication number
WO2016010456A1
WO2016010456A1 PCT/RU2015/000411 RU2015000411W WO2016010456A1 WO 2016010456 A1 WO2016010456 A1 WO 2016010456A1 RU 2015000411 W RU2015000411 W RU 2015000411W WO 2016010456 A1 WO2016010456 A1 WO 2016010456A1
Authority
WO
WIPO (PCT)
Prior art keywords
steel
low
hot
carbon
sulfur
Prior art date
Application number
PCT/RU2015/000411
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"
Publication of WO2016010456A1 publication Critical patent/WO2016010456A1/fr

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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
    • C22C38/04—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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur

Definitions

  • the invention relates to ferrous metallurgy, namely to the production of hot rolled steel from high strength for the manufacture of automotive components.
  • This steel is the closest to the proposed mechanical properties, composition and purpose and is taken as a prototype.
  • a disadvantage of the known steel is insufficient for the consumer machinability by cutting hot rolled steel on metal cutting machines.
  • the main technical objective of the invention is to increase machinability by cutting over the entire cross section and volume of rolled products from structural steel while maintaining mechanical properties at the level of low alloy structural steel of increased strength.
  • the minimum bismuth content in the steel of 0.005% is due to the achievement of machinability that satisfies the consumer.
  • the maximum content of 0.02% is experimentally selected for optimal casting conditions for continuous casting machines, compliance with the requirements for maximum permissible concentration (MAC) of bismuth in air (set at 0.5 mg / m 3 .
  • Quantitative sulfur content below 0.015% leads to a decrease in 'acceptable level of workability.
  • a sulfur content above 0.09% leads to a decrease in impact strength (impact work value) of the declared steel.
  • Smelting of the declared steel grade is carried out at CJSC Omutninsky Metallurgical Plant in a steel-smelting unit .
  • steel of the main composition is smelted, containing carbon, manganese, silicon, iron and inevitable impurities, after heating to 1620-1640 ° ⁇ they are discharged into a steel pouring ladle.
  • Deoxidation of steel with aluminum is carried out at a drain from the steelmaking unit into the ladle-, components are introduced into the bottom zone of the ladle for deoxidation at the optimum ratio [Mn] / [Si] s 3.
  • a sufficiently deep deoxidation of steel is carried out with secondary aluminum 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).
  • SUBSTITUTE SHEET (RULE 26) .After the release of the heat from the spa, furnace slag is removed from the steel pouring ladle. . During out-of-furnace treatment with a purge of metal with argon, 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 introducing 'in the form of particulate ferroalloy to achieve the target concentration 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.
  • Bismuth is introduced into steel by cored wire with MnBi filler (20/80) after additional thickening 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. During casting, the slag cover in the intermediate ladle is thickened with one-time additives of magnesite powder of 5-10 kg.
  • the obtained continuously cast 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 hinges of car doors.
  • SUBSTITUTE SHEET (RULE 26) parameters satisfied the consumers of the company. There was a proposal to replace the steel grade S355JO mod of all supplied hot-rolled profiles with the one proposed as the most satisfying processing and operating conditions.
  • the proposed chemical composition allows to obtain steel with a 1.2-1.4 times higher machinability by cutting on metal cutting machines over the entire cross section and volume of rolled metal while maintaining mechanical properties at the level of low alloy structural steel of increased strength
  • Patent for invention ⁇ '2505618. RU

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

L'invention se rapporte à la métallurgie des métaux ferreux, et concerne notamment des produits laminés à chaud faits d'acier structurel à faible teneur en carbone et faiblement dopé possédant une plus grande résistance et une meilleure aptitude à l'usinage par découpage afin de produire des composants automobiles laminés à chaud. L'acier comprend, en % en poids : 0,15-0,20 de carbone, 1,3-1,5 de manganèse, 0,05-0,45 de silicium, pas plus de 0,02 de phosphore, 0,015-0,09 de soufre, pas plus de 0,25 de cuivre, 0,03-0,055 de vanadium, 0,005-0,02 de bismuth, 0,004-0,015 d'azote, le reste se composant de fer et d'impuretés. Les produits laminés à chaud en acier ainsi produits ont une aptitude à l'usinage 1,2-1,4 plus élevée tout en conservant peur propriétés de résistance et d'élasticité aux chocs par rapport aux analogues.
PCT/RU2015/000411 2014-07-16 2015-07-01 Acier structurel faiblement dopé ayant une meilleure aptitude à l'usinage WO2016010456A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2014129278/02A RU2564502C1 (ru) 2014-07-16 2014-07-16 Низколегированная конструкционная сталь с повышенной обрабатываемостью
RU2014129278 2014-07-16

Publications (1)

Publication Number Publication Date
WO2016010456A1 true WO2016010456A1 (fr) 2016-01-21

Family

ID=54289509

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2015/000411 WO2016010456A1 (fr) 2014-07-16 2015-07-01 Acier structurel faiblement dopé ayant une meilleure aptitude à l'usinage

Country Status (2)

Country Link
RU (1) RU2564502C1 (fr)
WO (1) WO2016010456A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0903418B1 (fr) * 1996-11-25 2003-01-29 Sumitomo Metal Industries, Ltd. Acier d'excellente usinabilite et composant usine
EP1939309A1 (fr) * 2006-12-28 2008-07-02 Kabushiki Kaisha Kobe Seiko Sho Acier pour travail à froid à vitesse élevée et son procédé de production, et partie formée par un travail à froid à vitesse élevée et procédé correspondant

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1669207A1 (ru) * 1989-08-07 1996-05-27 В.А. Игнатов Сталь
RU2166559C2 (ru) * 1999-07-13 2001-05-10 Центральный научно-исследовательский институт конструкционных материалов "Прометей" Сталь для корпусов атомных реакторов повышенной надежности и ресурса

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0903418B1 (fr) * 1996-11-25 2003-01-29 Sumitomo Metal Industries, Ltd. Acier d'excellente usinabilite et composant usine
EP1939309A1 (fr) * 2006-12-28 2008-07-02 Kabushiki Kaisha Kobe Seiko Sho Acier pour travail à froid à vitesse élevée et son procédé de production, et partie formée par un travail à froid à vitesse élevée et procédé correspondant

Also Published As

Publication number Publication date
RU2564502C1 (ru) 2015-10-10

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