Process in the manufacture of steels containing nickel

Details Process in the manufacture of steels containing nickel Process in the manufacture of steels containing nickel

1977-03-01

1979-01-23

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 52, 751305, C21C 700, C22C 3304

Patent

active

041359160

ABSTRACT:
The invention provides a process of producing steels containing nickel, particularly corrosion-resistant steels, which involves refining the metal bath obtained from the smelting of a ferro-nickel by adding to said metal bath in a refining converter ferro-nickel shot while concurrently contacting the metal bath with an oxygen-containing gas, e.g., a mixture of oxygen and argon, the addition of the ferro-nickel shot being carried out while controlling the flow rate of the shot in such a way that the temperature of the converter is maintained at a pre-selected level and the contacting of the oxygen-containing gas with the bath being carried out until the carbon content of the bath is reduced to a low level, e.g., about 0.04%. The inventive process permits the initial carbon and silicon levels of the metal bath to exceed 1% and 0.4%, respectively. The invention also permits the ferro-nickel shot to be added as highly refined ferro-nickel shot or as slightly refined ferro-nickel shot, or it may be added in two phases, the first utilizing slightly refined ferro-nickel shot and the second utilizing highly refined ferro-nickel shot, or both the slightly refined and highly refined ferro-nickel shot may be simultaneously added.

REFERENCES:
patent: 2546340 (1951-03-01), Hilty
patent: 3323907 (1967-06-01), Kurzinski
patent: 3607247 (1971-09-01), McCoy

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