Conception of a Three Roll Cross Rolling Process of Hollow Rail Axles

The article presents an innovative method of forming hollow rail axles by cross rolling (CR) in a 3-roll mill. Assessing the correctness concept was conducted with numerical simulations Forge® NxT v.3.0. In order to investigate whether limitation form material cracking would occur analysed process critical values damage function for 42CrMo4 grade steel were determined. A new calibrating test, based on rotary compression disc-shaped sample channel developed. Changes wall thickness, effective strain, temperature and calculated basis normalised Cockcroft-Latham criterion Distributions force parameters done power mill necessary produce obtained.