ACTA

Analysis of Phase Precipitation in Sanicro 25 Austenitic Steel after Ageing

M. Sroka^a, A. Zieliński^b, G. Golański^c
^aSilesian University of Technology, S. Konarskiego 18A, 44-100 Gliwice, Poland
^bInstitute for Ferrous Metallurgy, K. Miarki 12-14, 44-100 Gliwice, Poland
^cCzęstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

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This paper presents the analysis of the processes of secondary phase precipitation in Sanicro 25 (22Cr25NiWCoCu) austenitic steel. The examined material was subject to long-term ageing for the time of annealing up to 10,000 h at 700 and 750°. The performed tests showed the presence of primary MX precipitates and Z phase. Long-term ageing resulted in the occurrence of the coherent phase rich in Cu (ε_Cu), M₂₃C₆ carbides, and precipitates of MX and NbCrN.

DOI:10.12693/APhysPolA.135.207
topics: Sanicro 25, microstructure, precipitation, ageing