NITRIDING METHOD OF STEEL Russian patent published in 2010 - IPC C21C7/72

Abstract RU 2380431 C1

FIELD: metallurgy.

SUBSTANCE: method includes vacuumizing of steel in ladle with simultaneous blowing off by inert gas through bottom porous tuyeres under high-basic slag. Blowing off in ladle at vacuumising is implemented through bottom porous tuyeres by nitrogen with intensity 3-25 m³/h and consumption 0.02-0.35 m³/t of steel. Oxidation of slag not more than 1.2% FeO and ratio CaO/ SiO₂ 2.1-2.8, herewith height of slag in ladle is provided equal to 80-150 mm.

EFFECT: usage of invention provides reduction of expenditures at nitriding of steel, reduction of oxygen concentration in steel and pollution level by nonmetallic inclusions, increasing of impact elasticity at negative temperatures.

Similar patents RU2380431C1

Title	Year	Author	Number
PROCEDURE FOR MELTING AND DEGASSING RAIL STEEL	2008	Jur'Ev Aleksej Borisovich Godik Leonid Aleksandrovich Kozyrev Nikolaj Anatol'Evich Zakharova Tat'Jana Petrovna Korneva Larisa Viktorovna Timmerman Natal'Ja Nikolaevna Kuznetsov Evgenij Pavlovich Obsharov Mikhail Vladimirovich	RU2394918C2
PROCEDURE FOR REFINING RAIL STEEL IN LADLE-FURNACE	2010	Mokhov Gleb Vladimirovich Aleksandrov Igor' Viktorovich Kozyrev Nikolaj Anatol'Evich Bojkov Dmitrij Vladimirovich Zakharova Tat'Jana Petrovna Korneva Larisa Viktorovna Mogil'Nyj Viktor Vasil'Evich	RU2425154C1
PROCEDURE FOR REFINING RAIL STEEL IN LADLE	2009	Jur'Ev Aleksej Borisovich Aleksandrov Igor' Viktorovich Kozyrev Nikolaj Anatol'Evich Timmerman Natal'Ja Nikolaevna Zakharova Tat'Jana Petrovna	RU2398890C1
PROCEDURE FOR PRODUCTION OF RAIL STEEL	2009	Aleksandrov Igor' Viktorovich Kozyrev Nikolaj Anatol'Evich Kuznetsov Evgenij Pavlovich Bojkov Dmitrij Vladimirovich Timmerman Natal'Ja Nikolaevna Korneva Larisa Viktorovna Mogil'Nyj Viktor Vasil'Evich	RU2415180C1
METHOD FOR PRODUCTION OF NITROGEN-DOPED STEEL IN BUCKET	2020	Kolokolov Evgenij Alekseevich Murzin Igor Sergeevich Garkushenko Igor Vladislavovich	RU2754337C1
METHOD OF REFINING OF STEEL IN LADLE-FURNACE	2008	Jur'Ev Aleksej Borisovich Godik Leonid Aleksandrovich Kozyrev Nikolaj Anatol'Evich Kuznetsov Evgenij Pavlovich Timmerman Natal'Ja Nikolaevna Zakharova Tat'Jana Petrovna Korneva Larisa Viktorovna	RU2365631C1
METHOD FOR PRODUCTION OF SUPER PURE ALUMINUM DEOXIDISED FOR PRODUCTION OF HIGH-QUALITY METAL PRODUCTS	2019	Botnikov Sergej Anatolevich Morov Dmitrij Vasilevich	RU2740949C1
HIGH-CARBON CORD-QUALITY STEEL OBTAINING METHOD	2004	Gunenkov Valentin Jur'Evich Pivtsaev Vitalij Vasil'Evich Matochkin Viktor Arkad'Evich Ehnders Vladimir Vladimirovich Guljaev Mikhail Pavlovich Kazakov Sergej Vasil'Evich	RU2269579C1
METHOD FOR OBTAINING STEEL FOR STEEL PIPES WITH EXCELLENT RESISTANCE IN ACID MEDIUM	2008	Numata Mitsukhiro Takeuti Singo Omura Tomokhiko	RU2433189C2
METHOD OF STEEL PRODUCTION	2023	Maslov Denis Evgenevich Kozlov Anton Igorevich Kazhev Aleksei Viktorovich Popov Oleg Vladimirovich	RU2828267C1

RU 2 380 431 C1

Authors

Jur'Ev Aleksej Borisovich

Godik Leonid Aleksandrovich

Kozyrev Nikolaj Anatol'Evich

Dates

2010-01-27—Published

2008-08-25—Filed