Method for inhibiting large steel ingot from macrosegregation by mechanical stirring

The invention relates to a method for inhibiting large steel ingot from macrosegregation by mechanical stirring, concretely to a method for inhibiting large steel ingot from macrosegregation by mechanically stirring melt steel to influence the solidification process, belonging to the manufacture technology of low macrosegregation large steel ingot. After large steel ingot is cast, the solidification layer of the side wall of the steel ingot reaches certain thickness, the mechanical stirring method is adopted, so that column shape crystal is crushed, nucleation mass points are increased, and the cooling speed of the steel ingot is accelerated, thus inhibiting solute from convecting, preventing the formation of macrosegregation passage to obtain low macrosegregation steel ingot with uniform component and fine tissue. The invention can solve the problems of macrosegregation of large steel ingot, such as uneven chemical component, coarse crystal grain, low smelting point and A type and V type of low density element (C, P and the like), low utility rate of steel ingot and the like, thus producing low macrosegregation large steel ingot with uniform chemical component. The invention is suitable for manufacturing of large steel ingots of sand type and metal type of all specifications and materials.