Characteristics of low nickel ferritic-austenitic corrosion resistant cast steel

The article presents the results of microscopic examinations of corrosion resistant cast steel with reduced nickel content obtained in a test casting with varying wall thickness. Investigations were carried out in as-cast condition and after heat treatment. Regardless of the casting wall thickness,...

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Bibliographic Details
Published inMetalurgija Vol. 53; no. 4; pp. 613 - 616
Main Authors B. Kalandyk, R. Zapała, S. Sobula, M. Górny, Ł. Boroń
Format Journal Article
LanguageEnglish
Published Croatian Metallurgical Society 01.10.2014
Subjects
duplex stainless cast steels
mechanical properties
microstructure
nitrogen
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Summary:The article presents the results of microscopic examinations of corrosion resistant cast steel with reduced nickel content obtained in a test casting with varying wall thickness. Investigations were carried out in as-cast condition and after heat treatment. Regardless of the casting wall thickness, increasing the manganese and nitrogen content to about 5 % and 2 500 ppm, respectively, yields the material with a two-phase microstructure containing ferrite in an amount of 55,6 ÷ 57,2 % (magnetic method) and 52,3 ÷ 55,2 % (analytical method). Based on the results of metallographic examinations, total elimination of the secondary austenite from the microstructure was observed. Microhardness measurements showed average values of 352,3 μHV20 and 267 μHV20 for the chromium ferrite and austenite, respectively.
ISSN:0543-5846
1334-2576