RU2007139144A - METHOD OF EXCEPTIONAL STEEL TREATMENT - Google Patents
METHOD OF EXCEPTIONAL STEEL TREATMENT Download PDFInfo
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- RU2007139144A RU2007139144A RU2007139144/02A RU2007139144A RU2007139144A RU 2007139144 A RU2007139144 A RU 2007139144A RU 2007139144/02 A RU2007139144/02 A RU 2007139144/02A RU 2007139144 A RU2007139144 A RU 2007139144A RU 2007139144 A RU2007139144 A RU 2007139144A
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- metal
- calcium
- oxygen activity
- oxygen
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
1. Способ внепечной обработки стали, включающий раскисление ее в ковше алюминием, продувку аргоном, и введение кальция, отличающийся тем, что перед продувкой аргоном металл вакуумируют, причем до введения кальция измеряют активность кислорода в металле и доводят до заданного уровня активность кислорода и содержание серы, а количество кальция, вводимого в металл (в пересчете на усвоенный), определяют с учетом требуемого состава неметаллических включений при активности кислорода 0,0005…0,0020% по уравнению: ! ! и при активности кислорода 0,0001…0,0005% по уравнению: ! ! где [Са] - требуемое для обеспечения оксидной фазы заданного состава содержание кальция, %; ! [S] - содержания серы перед обработкой кальцием, %; ! аO - активность кислорода в металле, %; ! СаО - заданное содержание СаО в неметаллическом включении, %. ! 2. Способ по п.1, отличающийся тем, что активность кислорода в металле доводят до заданного уровня путем введения раскислителя, например алюминия, один или более раз. ! 3. Способ по п.1, отличающийся тем, что количество кальция, вводимого в металл, должно удовлетворять условию: ! 0,5…2,0 аO≤[Са]≤2,5·[S] при активности кислорода 0,0005…0,002% и ! 2,0…10,0·аO≤[Са]≤2,5·[S] при активности кислорода 0,0001…0,0005%. ! 4. Способ по п.2, отличающийся тем, что количество кальция, вводимого в металл, должно удовлетворять условию: ! 0,5…2,0·аO≤[Са]≤2,5·[S] при активности кислорода 0,0005…0,002% и ! 2,0…10,0·аO≤[Са]≤2,5·[S] при активности кислорода 0,0001…0,0005%. ! 5. Способ по п.1, отличающийся тем, что кальций в металл вводят в виде порошковой проволоки в состав которой входит кальцийсодержащий легирующий компонент.1. A method of out-of-furnace treatment of steel, including deoxidation of it in aluminum with a purge, purging with argon, and the introduction of calcium, characterized in that the metal is evacuated prior to purging with argon, moreover, the oxygen activity in the metal is measured and the oxygen activity and sulfur content are adjusted to a predetermined level , and the amount of calcium introduced into the metal (in terms of assimilated) is determined taking into account the required composition of non-metallic inclusions with an oxygen activity of 0.0005 ... 0.0020% according to the equation:! ! and with an oxygen activity of 0.0001 ... 0.0005% according to the equation:! ! where [Ca] is the calcium content required to provide the oxide phase of a given composition,%; ! [S] - sulfur content before treatment with calcium,%; ! aO - oxygen activity in the metal,%; ! CaO - the specified content of CaO in non-metallic inclusion,%. ! 2. The method according to claim 1, characterized in that the oxygen activity in the metal is adjusted to a predetermined level by introducing a deoxidizer, for example aluminum, one or more times. ! 3. The method according to claim 1, characterized in that the amount of calcium introduced into the metal must satisfy the condition:! 0.5 ... 2.0 aO≤ [Ca] ≤2.5 · [S] with oxygen activity 0.0005 ... 0.002% and! 2.0 ... 10.0 · aO≤ [Ca] ≤2.5 · [S] with an oxygen activity of 0.0001 ... 0.0005%. ! 4. The method according to claim 2, characterized in that the amount of calcium introduced into the metal must satisfy the condition:! 0.5 ... 2.0 · aO≤ [Ca] ≤2.5 · [S] with oxygen activity 0.0005 ... 0.002% and! 2.0 ... 10.0 · aO≤ [Ca] ≤2.5 · [S] with an oxygen activity of 0.0001 ... 0.0005%. ! 5. The method according to claim 1, characterized in that calcium is introduced into the metal in the form of a flux-cored wire, which includes a calcium-containing alloying component.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2007139144/02A RU2362811C1 (en) | 2007-10-23 | 2007-10-23 | Method of steel out-furnace treatment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2007139144/02A RU2362811C1 (en) | 2007-10-23 | 2007-10-23 | Method of steel out-furnace treatment |
Publications (2)
Publication Number | Publication Date |
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RU2007139144A true RU2007139144A (en) | 2009-04-27 |
RU2362811C1 RU2362811C1 (en) | 2009-07-27 |
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RU2007139144/02A RU2362811C1 (en) | 2007-10-23 | 2007-10-23 | Method of steel out-furnace treatment |
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RU (1) | RU2362811C1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN118480643A (en) * | 2024-07-15 | 2024-08-13 | 宝武集团马钢轨交材料科技有限公司 | Control method for axle steel calcium treatment process |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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RU2607877C2 (en) * | 2015-06-10 | 2017-01-20 | Открытое акционерное общество "Волжский трубный завод" | Method for off-furnace steel treatment |
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2007
- 2007-10-23 RU RU2007139144/02A patent/RU2362811C1/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN118480643A (en) * | 2024-07-15 | 2024-08-13 | 宝武集团马钢轨交材料科技有限公司 | Control method for axle steel calcium treatment process |
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RU2362811C1 (en) | 2009-07-27 |
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PC41 | Official registration of the transfer of exclusive right |
Effective date: 20120409 |
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MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20121024 |