-
公开(公告)号：IS6961A
公开(公告)日：2003-09-18
申请号：IS6961
申请日：2003-09-18
Applicant: NUCOR CORP
Inventor： GROSS CLAY , MAHAPATRA RAMA BALLAV , BLEJDE WALTER , WIGMAN STEVEN LEONARD
IPC: B22D1/00 , B22D11/116 , B22D11/117 , C21C5/34 , C21C7/00 , C21C7/06 , C21C7/064 , C21C7/072 , C21C7/076
-
公开(公告)号：EE05426B1
公开(公告)日：2011-06-15
申请号：EEP200300482
申请日：2002-04-02
Applicant: NUCOR CORP
Inventor： GROSS CLAY A , MAHAPATRA RAMA BALLAV , BLEJDE WALTER , WIGMAN STEVEN LEONARD
IPC: B22D1/00 , B22D11/116 , B22D11/117 , C21C5/34 , C21C7/00 , C21C7/06 , C21C7/064 , C21C7/072 , C21C7/076
Abstract: A steel charge and slag forming material is heated in a ladle to form molten steel covered by a slag containing silicon, manganese and calcium oxides. The steel is stirred by injection of an inert gas such as argon or nitrogen to cause silicon/manganese deoxidisation and desulphurization to produce a silicon/manganese killed molten steel. Stirring of the molten steel by the inert gas injection while in contact with slag high in calcium oxide generates low free oxygen levels in the steel and desulphurization to sulphur levels below 0.009%. The slag may subsequently be thickened by lime addition to prevent reversion of sulphur back into the steel and oxygen may be injected into the steel to increase its free oxygen content to produce a steel that is readily castable in a twin roll caster.
-
公开(公告)号：UA93688C2
公开(公告)日：2011-03-10
申请号：UAA200802538
申请日：2006-08-04
Applicant: NUCOR CORP
Inventor： MAHAPATRA RAMA BALLAV , BLEJDE WALTER , STREZOV LAZAR , MUKUNTHAN KANNAPPAR
Abstract: Литаялента 12 изуглеродистойсталиизготовленанепрерывнымлитьемв двухвалковойлитейноймашине 11 иохлаждениемдляпреобразованиялентыизаустенитав ферритпритемпературев интервалемежду 400 °Си 850 °Си скоростиохлажденияболее 100 °С/сбезсниженияскоростиохлаждениядляобразованиялитойленты, содержащейменееприблизительно 1 % аустенитаи имеетмикроструктуру, более 10 % которойхарактеризуетсяразмеромпакетаболее 300 мкми котораяявляетсяили (i) смесьюполигональногоферритаи продуктовнизкотемпературногопревращения, или (ii) преимущественно, продуктаминизкотемпературногопревращения, иимеетпределтекучестинеменее 450 МПа. Литаялентапередохлаждениемпроходитсквозьстангорячейпрокатки 15 дляуменьшенияеетолщиныминимумна 15 % идо 50 %.
-
公开(公告)号：AU2004205422B2
公开(公告)日：2009-11-26
申请号：AU2004205422
申请日：2004-01-23
Applicant: NUCOR CORP
Inventor： BLEJDE WALTER , MAHAPATRA RAMA BALLAV
IPC: B22D11/06
Abstract: A method of producing cast steel strip having low surface roughness and low porosity by casting with molten steel having a total oxygen content of at least about 70 ppm and a free oxygen content between 20 and 60 ppm, and a temperature that allows a majority of any oxide inclusions to be in a liquidus state. The total oxygen content may be at least 100 ppm and the free oxygen content between 30 and 50 ppm. The steel strip produced by the method may have a per unit area density of at least about 120 oxide inclusions per square millimeter to a depth of about 2 microns from the strip surface.
-
公开(公告)号：AT414797T
公开(公告)日：2008-12-15
申请号：AT02712642
申请日：2002-04-02
Applicant: NUCOR CORP
Inventor： GROSS CLAY , MAHAPATRA RAMA , BLEJDE WALTER , WIGMAN STEVEN
IPC: B22D1/00 , C21C7/06 , B22D11/116 , B22D11/117 , C21C5/34 , C21C7/00 , C21C7/064 , C21C7/072 , C21C7/076
Abstract: A steel charge and slag forming material is heated in a ladle to form molten steel covered by a slag containing silicon, manganese and calcium oxides. The steel is stirred by injection of an inert gas such as argon or nitrogen to cause silicon/manganese deoxidisation and desulphurization to produce a silicon/manganese killed molten steel. Stirring of the molten steel by the inert gas injection while in contact with slag high in calcium oxide generates low free oxygen levels in the steel and desulphurization to sulphur levels below 0.009%. The slag may subsequently be thickened by lime addition to prevent reversion of sulphur back into the steel and oxygen may be injected into the steel to increase its free oxygen content to produce a steel that is readily castable in a twin roll caster.
-
Patent Agency Ranking
公开(公告)号：NZ541204A
公开(公告)日：2007-04-27
申请号：NZ54120404
申请日：2004-01-23
Applicant: NUCOR CORP
Inventor： MAHAPATRA RAMA BALLAV , BLEJDE WALTER
Abstract: A method of casting low carbon steel strip having inclusions is provided. A molten steel having a slag of iron, manganese, silicon and aluminium oxides is formed and passed between a pair of casting rolls to form the steel strip having MnO.SiO2.Al2O3 inclusions, the inclusions having a desired ratio of MnO/SiO2.
-
公开(公告)号：BR0212499A
公开(公告)日：2004-12-28
申请号：BR0212499
申请日：2002-09-13
Applicant: NUCOR CORP
Inventor： BLEJDE WALTER , MAHAPATRA RAMA BALLAV , STREZOV LAZAR
Abstract: A method of producing strip comprising the steps of assembling a pair of casting rolls with a nip between them, introducing between the casting rolls to form a casting pool of molten carbon steel having a total oxygen content of at least 100 ppm and usually less than 250 ppm, counter rotating the casting rolls, solidifying the molten steel on the rolls to form metal shells with levels of oxide inclusions reflected by the total oxygen content of the molten steel, and forming thin steel strip through the nip between the casting rolls from the solidified shells. A unique steel strip may be obtained using the method having ductile properties.
-
公开(公告)号：NO20034355L
公开(公告)日：2003-09-29
申请号：NO20034355
申请日：2003-09-29
Applicant: NUCOR CORP
Inventor： GROSS CLAY A , MAHAPATRA RAMA BALLAV , BLEJDE WALTER , WIGMAN STEVEN LEONARD
IPC: B22D1/00 , B22D11/116 , B22D11/117 , C21C5/34 , C21C7/00 , C21C7/06 , C21C7/064 , C21C7/072 , C21C7/076
Abstract: A steel charge and slag forming material is heated in a ladle to form molten steel covered by a slag containing silicon, manganese and calcium oxides. The steel is stirred by injection of an inert gas such as argon or nitrogen to cause silicon/manganese deoxidisation and desulphurization to produce a silicon/manganese killed molten steel. Stirring of the molten steel by the inert gas injection while in contact with slag high in calcium oxide generates low free oxygen levels in the steel and desulphurization to sulphur levels below 0.009%. The slag may subsequently be thickened by lime addition to prevent reversion of sulphur back into the steel and oxygen may be injected into the steel to increase its free oxygen content to produce a steel that is readily castable in a twin roll caster.
-
公开(公告)号：AU2003203055A1
公开(公告)日：2003-09-04
申请号：AU2003203055
申请日：2003-02-14
Applicant: NUCOR CORP
Inventor： BLEJDE WALTER , SOMMER JOEL
IPC: B22D11/06 , B22D1/00 , B22D46/00 , C21C5/30 , C21C7/00 , C21C7/06 , C21C7/064 , C21C7/072 , C21C7/076 , F27D19/00 , F27D21/00 , G01D21/00 , G01D21/02
Abstract: A system for determining process parameters for the ladle refinement of steel includes a computer executing a number of software algorithms for determining one or more process parameters for various steel refinement process steps. In one embodiment, for example, the computer is configured to determine the total amount of flux additions to achieve a desired sulfur percentage as part of a steel desulfurization process. In another embodiment, the computer is configured to determine the total quantity of oxygen to be injected into the steel as part of a steel reoxidation process. In still another embodiment, the computer is configured to determine a melting temperature of inclusions within the refined steel, and to determine whether this melting temperature is within an acceptable range to successfully process the steel in a continuous steel strip casting apparatus/process, or whether the steel must be reworked to achieve an acceptable inclusion melting temperature.
-
公开(公告)号：AU2002331433A2
公开(公告)日：2003-04-01
申请号：AU2002331433
申请日：2002-09-13
Applicant: NUCOR CORP
Inventor： STREZOV LAZAR , BLEJDE WALTER , MAHAPATRA RAMA BALLAV
Abstract: A method of producing strip comprising the steps of assembling a pair of casting rolls with a nip between them, introducing between the casting rolls to form a casting pool of molten carbon steel having a total oxygen content of at least 100 ppm and usually less than 250 ppm, counter rotating the casting rolls, solidifying the molten steel on the rolls to form metal shells with levels of oxide inclusions reflected by the total oxygen content of the molten steel, and forming thin steel strip through the nip between the casting rolls from the solidified shells. A unique steel strip may be obtained using the method having ductile properties.
-
-
-
-
-
-
-
-
-
Search Results
87
records
(took 0.021 seconds)
