The invention belongs to the technical field of
metal casting, and particularly relates to a method for inhibiting macrosegregation of elements in the solidification process of a large cast
ingot through a
grating method. The method comprises the following steps: preparing a plurality of cylindrical
metal bars with the same components as a cast
ingot target, wherein each
metal bar has a stepped
melting point structure; establishing a virtual
grid network of the cross section of the cast
ingot, and dividing the cross section into a matrix node array; the solidification
front edge position is monitored in real time, and when a solidification layer reaches grid node coordinates, a metal rod is vertically inserted into a cast ingot through a hydraulic
servo mechanism; and applying a micro-area energy field on the surface of the metal rod, namely
coating a heat release
coating and applying electromagnetic oscillation. According to the method, the
ingot casting temperature field real-time mapping model is established, and the large
ingot casting solidification process is accurately intervened. On the basis of a
grating method, a metal rod is combined with an exothermic
coating and mechanical disturbance to
delay local solidification, and macrosegregation of elements of a large cast ingot is remarkably improved.