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This paper presents the results of a numerical analysis of a two-stage forging process for producing a hollow part with an external flange. The numerical analysis was performed viathe finite element method using Deform-2D/3D. The analysed case includeda cold forming process. The billet was a tube made ofalow alloy steel grade 42CrMo4with its flow curve described by a constitutive equation. The forming process involved the use of two operations: extrusion and forging in a tapered die cavity. The objective of the study was to determine whether the proposed forming technique could be used for production ofhollow flanged parts. The kinematics of material flow, distributions of effective strains and the Cockcroft–Latham ductile fracture criterion,as well as force parameters were examined.The conducted research confirmed the correctness of the proposed method.
