Browsing by Subject "impression-die forging"

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Access status: Open Access ,
Effect of deformation degree on properties of forgings after thermomechanical treatment
(2006) Skubisz, Piotr; Sińczak, Jan; Bednarek, Sylwia; Łukaszek-Sołek, Aneta
Utilization of thermo-mechanical treatment in forging medium-carbon alloyed steel including microaddition of titanium is presented. Results of forging tests carried out in industrial conditions with a use of a high-speed forging press in conventional cooling conditions are compared with those involving controlled forging and direct cooling after forging. Significant grain refinement accompanied by increase in tensile properties was observed. It was also concluded that deformation degree has an effect on the final mechanical properties.
Access status: Open Access ,
Reduction of die loading by divided flow pattern in the finisher die web area
(2008) Skubisz, Piotr; Sińczak, Jan; Chyła, Paweł
Physical and numerical modelling of the forging process of a complex shape axisymmetrical part has been presented. Three different solutions of forging technology have been analysed in order to obtain improvement in the metal flow kinematics in the last stage of forging in finisher die, as well as, favourable distribution of mechanical parameters in workpiece and tools. Improved design of preform produced divided flow pattern in the finisher die, resulting in reduction of loading and stresses in tools.