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Archives of Metallurgy and Materials

The Journal of Institute of Metallurgy and Materials Science and Commitee on Metallurgy of Polish Academy of Sciences

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Manganese Influence on Chromium Distribution in High-Chromium Cast Irons

S. Byelikov
  • METAL TECHNOLOGY DEPARTMENT, ZAPORIZHZHYA NATIONAL TECHNICAL UNIVERSITY 64 ZHUKOVSKOGO ST., 69063, ZAPORIZHZHYA, UKRAINE
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ I. Volchok
  • METAL TECHNOLOGY DEPARTMENT, ZAPORIZHZHYA NATIONAL TECHNICAL UNIVERSITY 64 ZHUKOVSKOGO ST., 69063, ZAPORIZHZHYA, UKRAINE
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ V. Netrebko
  • METAL TECHNOLOGY DEPARTMENT, ZAPORIZHZHYA NATIONAL TECHNICAL UNIVERSITY 64 ZHUKOVSKOGO ST., 69063, ZAPORIZHZHYA, UKRAINE
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2013-09-17 | DOI: https://doi.org/10.2478/amm-2013-0095

Abstract

It is shown that chromium distribution in the metal base of high-chromium cast irons depends on manganese content. According to the X-ray micro-spectral analysis data with the increase of manganese content from 0.72 to 6.49% chromium content decreased in the near-carbide zones. At the same time chromium content in carbides increased. This process obtained particularly strong development inside eutectic colonies of carbides. As a result of it, when total chromium content in the alloy has been 23%, its concentration in the local zones was 12,3%, thus the necessary level of corrosion resistance has not been provided. The minimal chromium content has to amount 23.2%, at 6.49% Mn and 2.2...2.5% C in order to provide corrosion resistance of high-chromium cast irons

Streszczenie

Pokazano, ze rozkład chromu w osnowie metalowej zeliwa o wysokiej zawartosci chromu zalezy od zawartosci manganu. Zgodnie z wynikami spektralnej mikroanalizy rentgenowskiej zwiekszenie stezenie manganu z 0,72 do 6,49% powoduje zmniejszenie stezenia chromu w osnowie metalowej na granicy z weglikami. Równoczesnie wzrasta zawartosc chromu w weglikach. Zjawisko to wystepuje z wieksza intensywnoscia w osnowie metalowej ziaren eutektycznych, pomiedzy eutektycznymi weglikami. W wyniku redystrybucji chromu w zeliwie o zawartosci 23% chromu wystepuja lokalne strefy o stezeniu tego pierwiastku obnizonym do 12,3%, co skutkuje niedopuszczalnym obnizeniem odpornosci przeciwko korozji. Dla zapewnienia odpornosci korozyjnej wysokochromowego zeliwa, zawierajacego od 2,2 do 2,5% C i 6,49% Mn, stop ten powinien zawierac powyzej 23,2% Cr.

Keywords: cast iron; chromium; manganese; distribution; microstructure

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About the article

Published Online: 2013-09-17

Published in Print: 2013-09-01


Citation Information: Archives of Metallurgy and Materials, Volume 58, Issue 3, Pages 895–897, ISSN (Print) 1733-3490, DOI: https://doi.org/10.2478/amm-2013-0095.

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