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Open AccessArticle

Effect of Microstructures on Working Properties of Nickel-Manganese-Copper Cast Iron

1
Faculty of Technical and Economic Sciences, Witelon State University of Applied Science in Legnica, Sejmowa 5A, 59-220 Legnica, Poland
2
Department of Foundry Engineering, Plastics and Automation, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50-372 Wrocław, Poland
3
Department of Advanced Materials Technologies, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50-372 Wrocław, Poland
*
Author to whom correspondence should be addressed.
Metals 2018, 8(5), 341; https://doi.org/10.3390/met8050341
Received: 12 April 2018 / Revised: 7 May 2018 / Accepted: 7 May 2018 / Published: 11 May 2018
(This article belongs to the Special Issue Microstructure and Mechanical Properties of Casting Alloys)
In the paper, the effects, on basic usable properties (abrasive wear and corrosion resistance), of solidification (acc. to the stable and non-stable equilibrium system) and transformations occurring in the matrix during the cooling of castings of Ni-Mn-Cu cast iron were determined. Abrasive wear resistance was mainly determined by the types and arrangements of high-carbon phases (indicated by eutectic saturation degree), and the kinds of matrices (indicated by the nickel equivalent value, calculated from chemical composition). The highest abrasive wear resistance was found for white cast iron, with the highest degree of austenite to martensite transformation occurring in its matrix. Irrespective of solidification, a decrease of the equivalent value below a limit value resulted in increased austenite transformation, and thus, to a significant rise in hardness and abrasive wear resistance for the castings. At the same time, corrosion resistance of the alloy was slightly reduced. The examinations showed that corrosion resistance of Ni-Mn-Cu cast iron is, too a much lesser degree, decided by the means of solidification of the castings, rather than transformations occurring in the matrix, as controlled by nickel equivalent value (especially elements with high electrochemical potential). View Full-Text
Keywords: alloy cast iron; cast iron Ni-Mn-Cu; austenitic transformation; abrasive wear; corrosion alloy cast iron; cast iron Ni-Mn-Cu; austenitic transformation; abrasive wear; corrosion
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Medyński, D.; Janus, A.; Samociuk, B.; Chęcmanowski, J. Effect of Microstructures on Working Properties of Nickel-Manganese-Copper Cast Iron. Metals 2018, 8, 341.

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