FIELD: metallurgy.
SUBSTANCE: steel is run from steel making unit into steel teeming ladle with feeding deoxidising agent, alloying and slag-forming calcium-bearing materials therein, to be jet degassed. Calcium-bearing material represents powder wire with combined filler consisting of mechanical mix of silicocalcium CK15 and metallic calcium in amount of 0.3-1.0 kg/t taken to get calcium content in metal equal to 0.0012-0.0040 wt %. Jet degassing is performed by argon with total flow rate of 0.2-0.5 l/(t*min) for 7 to 10 minutes.
EFFECT: maximum possible removal of nonmetallic inclusions, stabilised casting, higher quality of cast steel.
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Authors
Dates
2012-09-20—Published
2011-05-27—Filed