VACUUM ARC REMELTING METHOD Russian patent published in 2004 - IPC

FIELD: electric metallurgy, in particular, melting of highly reactive metals and alloys, such as titanium alloys.

SUBSTANCE: method involves charging and welding consumable electrode; vacuumizing; providing arc ignition; heating electrode for melting thereof, with heating-up and melting of electrode at initial period being performed at initial values of arc length and arc current providing stable arc ignition diffusion mode; maintaining said melting mode until liquid metal film is formed along the entire perimeter of electrode end; increasing arc current and voltage to nominal values and continuing electrode melting procedure. Method allows ingot bottom part to be thoroughly melted-through and pan to be protected from being fires, when arc current and voltage are increased to nominal values.

EFFECT: increased efficiency and improved quality of remelted metal and alloy.

3 cl, 2 ex