Title:
CHROMIUM-CONTAINING METAL AND METHOD FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2001/066809
Kind Code:
A1
Abstract:
A metal having a high chromium content, characterized in that it is produced in an arc melting furnace and contains Cr in an amount of 85 % or more and has an Al content of 0.005 % or less, an Si content of 0.1 % or less and an S content of 0.002 % or less; and a method for producing the metal having a high chromium content which comprises reducing a chromium oxide heated and melted in an arc melting furnace with Si, to thereby prepare a metal melt containing 85 % or more of Cr, discharging a slag formed by the reduction with Si from the arc melting furnace, adding a fresh basic flux into the arc melting furnace, melting the basic flux with arc, to bring a slag formed by the melting of the basic flux to contact with the above metal melt and thereby refine the metal melt, and then taking out the refined metal melt from the arc melting furnace, followed by casting.
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Inventors:
SUGIMORI HIROITI (JP)
MATSUMURA CHITOSHI (JP)
KAWAGUSHI SATOAKI (JP)
KATO MASANORI (JP)
MATSUMURA CHITOSHI (JP)
KAWAGUSHI SATOAKI (JP)
KATO MASANORI (JP)
Application Number:
PCT/JP2001/001721
Publication Date:
September 13, 2001
Filing Date:
March 06, 2001
Export Citation:
Assignee:
NIPPON KOKAN KK (JP)
NKK MATERIAL CO LTD (JP)
SUGIMORI HIROITI (JP)
MATSUMURA CHITOSHI (JP)
KAWAGUSHI SATOAKI (JP)
KATO MASANORI (JP)
NKK MATERIAL CO LTD (JP)
SUGIMORI HIROITI (JP)
MATSUMURA CHITOSHI (JP)
KAWAGUSHI SATOAKI (JP)
KATO MASANORI (JP)
International Classes:
C21C5/52; C21C5/54; C21C7/076; C22B4/04; C22B5/04; C22B9/04; C22B9/10; C22B9/20; C22B34/32; C22C27/06; C22C33/04; (IPC1-7): C22B5/00; C22B9/00; C22B34/32; C22C33/04
Foreign References:
| JPS52123313A | 1977-10-17 | |||
| JPS5511146A | 1980-01-25 | |||
| JPS56102368A | 1981-08-15 | |||
| JPS6247437A | 1987-03-02 |
Attorney, Agent or Firm:
Ishikawa, Yasuo (4F 17-11, Shiba 2-chome Minato-ku Tokyo-to, JP)
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