MICHAEL A OREHOSKI
Engineers in Duquesne, PA
License number
Pennsylvania PE002451E
Category
Engineers
Type
Professional Engineer
Address
Address
Duquesne, PA 15110
Professional information
Steel Making Method
US Patent:
4612043, Sep 16, 1986
Filed:
Mar 29, 1984
Appl. No.:
6/595313
Inventors:
Ronald D. Gray - Bethel Park PA
Michael A. Orehoski - Duquesne PA
Michael A. Orehoski - Duquesne PA
Assignee:
Pennsylvania Engineering Corporation - Pittsburgh PA
International Classification:
C21C 710
US Classification:
75 49
Abstract:
A method of making steel having low levels of carbon, nitrogen, phosphorous and oxygen comprises the steps of vacuum reladling a ladle of low phosphorous steel for reducing carbon levels and separating the metal from a highly oxidizing slag, blowing oxygen into the metal contained in a teeming ladle at a vacuum pressure and simultaneously bubbling an inert gas through the metal for removing additional carbon and elevating the temperature of the metal, discontinuing the oxygen blow while maintaining the vacuum pressure and continuing the delivery of inert gas for removal of nitrogen. A desulphurizing agent may be delivered prior to the oxygen blow and alloying additions may be made as required.