6. The birth and development of pocket metallurgy
At the end of the Second World War, the processing of liquid steel
outside the melting furnace was limited to two very specific types
of application:
vacuum degassing of special steels, mainly to eliminate
hydrogen, the cause of brittle fractures;
stirring of steel during ladle casting with a separately
melted deoxidizing and desulfurizing slag: the Perrin process used
mainly by Ugine
...
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The birth and development of pocket metallurgy