Metallurgy, Vol. 41 No. 2, 2002.
Original scientific paper
Effect of Nb and Ti on Microstructure and Mechanical Properties of 30% Ni / 18% Cr Cast Steel After Annealing
B. Piekarski
M. Garbiak
Abstract
The study discusses the microstructure and mechanical properties of eight tested 0.3 % C -30 % Ni - 18 % Cr cast steels stabilized with niobium and titanium after annealing in the cycle of 900 °C / 300 h. The niobium content in the cast steels varied from 0.0 to 2.0 % and that of titanium from 0.0 to 1.2 % by weight. Microstructure was examined using both light microscope and a scanning electron microscope with Link IS-IS attachement as well as an X-ray diffractometer. Depending on the chemical composition of cast steel, the following phases were identified: carbides of MC and M23C6 type and a phase rich in silicon, nickel, niobium and / or titanium, which was supposed to be a phase G. Relationships between the microstructure and mechanical properties of cast steel at 20 and 900 °C were examined as well.
Keywords
Hrčak ID:
128590
URI
Publication date:
1.4.2002.
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