FIELD: metallurgy.
SUBSTANCE: item is heated from initial temperature to specified temperature in zone (6, 7, 8) of heating equipped with at least one burner operating on fuel, particularly, fuel gas and oxygen containing gas containing more, than 21% of oxygen. The item is introduced into a direct contact with flame of the burners and is displaced through the zone of heating in the direction of displacement. Also, the flame envelops the item along its total external border of its surface across the direction of displacement. In a zone of the burner flame air coefficient λ is set depending on said initial temperature and/or specified temperature of the item and is heated uniformly with precise control of oxidation degree.
EFFECT: manufacture of required surface, characteristic and micro-structure of steel item.
10 cl, 7 dwg
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