Study on thermal treatment regime effect on the phase content of heat resisting alloys

The changes are studied in nickel-chrome alloys on heat treatment and ageing by using the method of electrochemical phase separation with measurement of the amount of segregated γ-phase and its parameter Eh1437BUVD, EhI1698VD and ZhS6-KP alloys were used for the study. The amount of γ-phase in nickel-chrome-based alloys changes in the course of ageing only in the initial period up to 4 hr. The cooling rate on hardening affects the amount of γ-phase, i.e. the higher the rate, the lower is the content of γ-phase. An increase in the time of holding at the hardening temperature increases the amount of strengthening phase