20MnSi hot rolling ribbed steel bar SINGLE-SLAG PROCESS TO ELECTRIC ARC FURNACE MELTING

20MnSi hot rolling ribbed steel bar SINGLE-SLAG PROCESS TO ELECTRIC ARC FURNACE MELTING

  • CN 1,098,439 A
  • Filed: 06/19/1994
  • Published: 02/08/1995
  • Est. Priority Date: 06/19/1994
  • Status: Abandoned Application
First Claim
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1. , the 20MnSi hot rolling ribbed steel bar SINGLE-SLAG PROCESS TO ELECTRIC ARC FURNACE MELTING that comprises processing steps such as taking off fettling, charging, melting period, oxidation period, alloy baking and ingot casting.It is characterized in that whole smelting process only makes oxidation sludge, strict batching, make the sulfur-bearing into the stove steel scrap be lower than 0.045% as far as possible, carbon containing is higher than 0.50%.Finish molten steel heating and dephosphorization and decarburization in oxidation period, in oxidation phase not, clean boiling time is not shorter than 5 minutes, carries out the adjustment of molten steel temperature and molten steel composition, then tapping.In tapping process, tap earlier and afterwards slag tap, in ladle, carry out deoxidation and desulfurization (when sulphur content surpasses 0.04%) and alloying.After having gone out steel,, be cast into steel ingot at last with molten steel calmness 4-7 minute.

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