from the conferences organized by TANGER Ltd. provisional website
The paper presents the results of investigation concerned with the inner surface quality of Zr-1% Nb alloy tubes produced on a KPW-type pilger rolling mill with an elongation factor of = 3.9. In order to analyze the influence of applied velocities and deformations on the variations of the flow stress σp values of the investigated alloy, an experiment by testing programme was carried out in industrial conditions and the physical modelling of the rolling process was performed. For the physical modelling of the investigated process, the metallurgical process simulator GLEEBLE 3800 was employed. The relationships σp= σp (ε,) have been obtained for the conditions of both intermittent and continuous cold deformation of the examined alloy and recommendations for the distribution of stress across the rolling gap have been given.Keywords: Pilger rolling, zirconium alloy, tube inner surface defects, flow stress, physical modelling
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