Process for the production of steel with increased ductility

Details Process for the production of steel with increased ductility Process for the production of steel with increased ductility

1975-04-18

1976-11-16

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 53, C21C 702

Patent

active

039921956

ABSTRACT:
A process for the production of steel with increased ductility in which a sulfur-containing steel melt is deoxidized and, if desired, is supplied with alloying elements, the deoxidized melt is treated with calcium as part of a purification action simultaneously reducing the sulfur content and the reaction is carried out in a casting ladle having a lining free from siliceous oxides. The melt is covered with a synthetic slag free from siliceous oxides and the calcium-containing substance is introduced in fine-grain particulate form into the melt in a carrier gas at a level at least 2000 mm below the melt surface and at a rate which is less than the maximum rate at which the calcium-containing substance is capable of reacting with the melt.

REFERENCES:
patent: 2803533 (1957-08-01), Bieniosek
patent: 3258328 (1966-06-01), Goss
patent: 3567432 (1971-02-01), Wardell
patent: 3575695 (1971-04-01), Miyashita
patent: 3598573 (1971-08-01), Freissmuth
patent: 3876421 (1975-04-01), Takemura
patent: 3885957 (1975-05-01), Richter

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