The invention relates to a method for
smelting ultra-low carbon stainless steel in a
vacuum induction furnace. The method comprises the steps of filling raw materials required by
smelting into a
crucible; starting to heat after vacuumizing until the raw materials are melted down; reducing the vacuum degree, and adding
iron ore into the
molten steel till [C] is less than or equal to 0.01 wt%; stopping vacuum, adding aluminum until [O] is less than or equal to 0.002 wt%, starting a
vacuum pump, and pre-degassing until [N] is less than or equal to 0.002 wt%; adding
metal chromium, heating after melting down, and carrying out vacuum final degassing until [N] is less than or equal to 0.003 wt%;
cutting off power to form a film, introducing
argon, alloying Nb and Ti elements, adding an
alloy, switching to a stirring power supply, and electrifying to melt down; and raising the temperature to 30-60 DEG C above the
molten steel liquidus temperature, and carrying out electrified tapping. According to the method, the harmful element C is effectively reduced through
iron ore decarburization, excessive acid-soluble
aluminum can be volatilized through high-vacuum degassing, N, O and H can be reduced, the cleanliness of the steel is improved, and it can be guaranteed that the component structure of a steel
ingot is more uniform through low-
liquidus casting.