The invention belongs to the field of pressure
processing of steel materials, particularly relates to a
forging-and-rolling compounded forming method for comprehensively promoting internal and external quality of wide and
thick plate blanks. Numerical
simulation technique is adopted to study internal
strain distribution of the plate blanks formed by pure rolling, pure
forging and the
forging-and-rolling compounded forming method, and the forging-and-rolling forming method is provided and includes steps of 1), firstly heating the plate blanks to be cast; 2), subjecting the plate blanks to forging and deforming in a large
hydraulic press after heating the same; 3), returning the plate blanks to be forged in a
heating furnace for heat preservation after forging and deforming; and 4), delivering the forged plate blanks in a heated manner to a
rolling mill to be rolled after heat preservation or cooling the same slowly to
room temperature prior to being heated and rolled again. The forging-and-rolling compounded forming method has the advantages that the forging-and-rolling compounded forming method is applicable to forming process of various molded wide and
thick plate blanks (slab
ingot), especially to blanks with central looseness; by the method, the defect of core density loose of the wide and
thick plate blanks can be overcome, micro-segregation can be alleviated, and texture of the plate blanks can be refined and distributed well; and meanwhile, surface quality of the
steel plates can be guaranteed, working allowance can be reduced, and the finished wide and thick plate blanks with 'internal solidness and external refinement' can be realized.