Vliv mezioperačního žíhání při výrobě tvářených dílů z korozivzdorných ocelí a niklových superslitin

Abstract

This Bachelor’s thesis examines the need for in-process annealing in the production of formed parts made of stainless steels and nickel-based superalloys. The first experiment characterized the effect of repeated annealing on structure of nickel-based superalloy Inconel 718. The results showed, that increased repetition of annealing at this temperature leads to an enormous exclusion of delta phase. Next experiments were performed with superalloy Haynes 188 and steel A 286 with the aim to describe structural changes following deformation and heat treatment. Both materials were exposed to different deformation values and annealing temperatures. In conclusion, in both of these experiments were determined a temperature at which the critical deformation of the structure was affected by grain growth.