Forged steel roll journal indefinite chill high nickel-chromium-molybdenum composite roll process and equipment

The invention discloses a forged steel roll journal indefinite chill high nickel-chromium-molybdenum composite roll process and equipment. A material comprises the following components in percentages by mass: 3.1-3.5% of C, 0.70-1.20% of Si, 0.40-1.20% of Mn, 3.0-4.8% of Ni, 1.0-2.0% of Cr, 0.40-1.1% of Mo, 0.1-2% of W, 0.5-1.0% of Cu, less than or equal to 0.05% of P, less than or equal to 0.03% of S, 1-3% of Sb, 0.02-0.18% of N, 0.1-0.3% of Ce, and the balance Fe and inevitable trace elements; rare earth Ce and silicon iron are subjected to compound inoculation, Sb and N are added to carry out grain refinement, mechanical properties of a roll are improved, the strength of the roll is improved by a forced steel roll journal, a mandrel is subjected to internal integral heating fusion casting by an induction heater, forming is implemented by a water-cooled crystallizer, an interface of a composite layer can be controlled dynamically, the process is simple, the cost is low, composition segregation is avoided, and the service life of the roll is long.