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Casting steel strip with low surface roughness and low porosity



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Patent 7367378
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Document Number
US Patent 7367378
Issued Date
May 6, 2008
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Inventors
Blejde; Walter (Brownsburg, IN)
Mahapatra; Rama (Brighton-Le-Sands,AU)
Strezov; Lazar (Adamstown Heights,AU)
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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 100 ppm and a temperature that allows a majority of any oxide inclusions to be in a liquidus state. 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.
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Number of Claims:
7
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Owner
Nucor Corporation (Charlotte, NC)
Published
May 6, 2008
Application Number
11/277,675
Filed
March 28, 2006
US Classification
164/480   164/428
Int'l Classification
B22D   11/06   (20060101)  
Examiner
Parent Case
This application is a continuation of pending application Ser. No. 11/000,593, filed Dec. 1, 2004 now U.S. Pat. No. 7,299,856, which is a division of application Ser. No. 10/350,777, filed Jan. 24, 2003, now abandoned. Applications Ser. Nos. 11/000,593 and 10/350,777 are hereby incorporated by reference.
USPTO Field of Search
164/480   164/128   164/473   164/459   164/428  
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