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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Published in | Metalurgija Vol. 53; no. 4; pp. 613 - 616 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Croatian Metallurgical Society
01.10.2014
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Subjects | |
Online Access | Get full text |
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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. |
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ISSN: | 0543-5846 1334-2576 |