Improvement of Mass Production Process for High Purity Ferritic Stainless Steel

摘要

In order to meet the demand for low carbon and nitrogen stainless steel, the VOD process has been under operation in Wakayama Steel Works since 1990. In 1993, in order to lower [C] and [N] in high Cr and high purity ferritic stainless steel, the VOD-PB(Powder Top Blowing) method was applied. In this method, the powdered oxidizerr is blown and penetrated into molten steel with Ar gas through the top lance nozzle under reduced pressure.