Publisher: John Wiley & Sons Inc
E-ISSN: 1869-344x|86|12|1498-1507
ISSN: 1611-3683
Source: STEEL RESEARCH INTERNATIONAL, Vol.86, Iss.12, 2015-12, pp. : 1498-1507
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
The effect of different stirring conditions during ladle treatment on the steel cleanliness was studied in the steel plant of SSAB Special Steels in Oxelösund, Sweden. The cleanliness was examined with regards to the contents of sulfur, nitrogen, and large inclusion (>10 μm). The results showed that vacuum degassing increased the amount of inclusions larger than 10 μm and that subsequent induction stirring suggested a possible positive effect on the inclusion removal. A shortening of the vacuum degassing time from 24 to 15 min did not affect the nitrogen or sulphur refining. Overall, all heats reached the desired composition and cleanliness levels regardless of the treatment time.
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