| 摘要 |
PROBLEM TO BE SOLVED: To provide a useful Bi addition method by which yield of added Bi can be improved and Bi concentration in molten steel can be efficiently increased. SOLUTION: An outer steel shell wire in which a powder mixture of Bi oxide powder and Fe-Mn alloy powder is sealed is put into the molten steel. Bi yield can be increased with certainty by regulating the mass ratio of the Bi oxide powder to the Fe-Mn alloy powder to a value preferably within the range satisfying equation (Bi oxide powder):(Fe-Mn alloy powder)=(50:50) to (90:10). COPYRIGHT: (C)2005,JPO&NCIPI
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