Transformation of the Structure of Refractory Alloy 0.45C – 26Cr – 33Ni – 2Si – 2Nb During a Long-Term High-Temperature Hold

The continuous variation of structure and the kinetics of dissolution of the initial phases with formation and dissolution of intermediate phases at the temperature of long-term operation of cast refractory alloy 0.45C – 26Cr – 33Ni – 2Si – 2Nb are studied. The behavior and succession of phase transformations in Fe – Cr – Ni-base alloys at a temperature of 0.85 – 0.90 of their solidus, including the case of the action of external load, is determined. The effect of high-temperature transformations of structure on the operating properties of the alloy is estimated.