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Licensed Unlicensed Requires Authentication Published by De Gruyter January 18, 2019

Microstructural and thermal characterization of 39NiCrMo3 steel

Mikrostrukturelle und thermische Charakterisierung eines Stahles 39NiCrMo3
Dragan Manasijević, Žarko Radović, Nada Štrbac, Ljubiša Balanović, Uroš Stamenković, Milan Gorgievski, Duško Minić, Milena Premović, Tamara Holjevac Grgurić and Nebojša Tadić
From the journal Materials Testing

Abstract

The microstructure and thermal properties of a 39NiCrMo3 low alloy steel ingot obtained by melting in an electric arc furnace (EAF) and refining by electro-slag remelting (ESR) were experimentally investigated using scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD), thermal diffusivity measurements and differential scanning calorimetry (DSC). A phase diagram of the alloy steel investigated was calculated using Thermo-Calc software and a TCFE6 database. It was determined that the steel investigated displays a ferrite-very fine pearlite microstructure. The thermal conductivity of the investigated steel, measured in the temperature range from 25 to 400 °C, decreases from 44.3 to 38.3 W × (m × K)−1.

Kurzfassung

Die Mikrostruktur und die thermischen Eigenschaften eines niedrig legierten Barrens des Stahles 39NiCrMo3, der im Elekrtostahlofen erschmolzen und mittels des Elektroschlackeumschmelz-Verfahrens veredelt wurde, wurden experimentell mittels Rasterlektronenmikroskopie und EDS, Röntgenspektroskopie (XRD), Temperaturleitfähigkeitsmessungen und dynamischer Differenzkalorimetrie untersucht. Das Phasendiagramm des niedrig legierten Stahles wurde mittels der Software Thermo-Calc und der Datenbasis TCFE6 berechnet. Es stellte sich heraus, dass der Stahl eine ferritische und sehr fein perlitische Mikrostruktur aufweist. Die thermische Leitfähigkeit des Stahles nahm von 44,3 auf 38.3 W × (m × K)−1 im Temperaturbereich zwischen 25 und 400 °C ab.


*Correspondence Address, Prof. Dr.-Ing. Dragan Manasijević, University of Belgrade, Technical Faculty in Bor, VJ 12, 19210 Bor, Serbia, E-mail:

Prof Dr.-Ing. Dragan Manasijević, born 1975, is Full Professor at the Department for Metallurgical Engineering, Technical Faculty in Bor, University of Belgrade, Serbia. He finished his PhD in 2007. His main fields of interest are the thermodynamics of metallic systems, the calculation and experimental determination of phase diagrams and thermal analysis.

Prof Dr.-Ing. Žarko Radović, born 1967, is Full Professor at the Faculty of Metallurgy and Technology, University of Montenegro, Podgorica, Montenegro. He finished his PhD in 2000. His main professional fields of interest are transfer phenomena in steel metallurgy, secondary metallurgy, continuous casting.

Prof. Dr.-Ing. Nada Štrbac, born 1964, is Full Professor at the Department for Metallurgical Engineering, Technical Faculty in Bor, University of Belgrade, Serbia. She finished her PhD in 1996.

Assistant Prof. Dr.-Ing. Ljubiša Balanović, born 1975, works in the Department of Metallurgical Engineering, Technical Faculty in Bor, University of Belgrade, Serbia. He finished his PhD in 2013. He is author and co-author of more than 30 scientific papers in national and international journals. His main fields of interest are the experimental determination of phase diagrams and microstructural analysis of alloys.

MSc Uroš Stamenković, born 1989, works at the Department for Metallurgical Engineering, Technical Faculty in Bor, University of Belgrade, Serbia. He graduated and entered post-graduate studies in 2012 at the Metallurgical Engineering Department, Technical Faculty in Bor. Currently, he is engaged in doctoral academic studies at the same department. His further scientific research includes: the thermomechanical treatment of aluminum alloys from the 6000 series, new materials, optical and SEM investigation of materials, characterization of materials through mechanical testing (hardness, toughness and tensile strength), testing physical properties (electrical conductivity, diffusivity, thermal conductivity, heat capacity).

Assistant Prof. Dr. Milan Gorgievski, born 1982, is Assistant Professor at the Department of Metallurgical Engineering at Technical Faculty in Bor, University of Belgrade, Serbia. He finished his PhD in 2015.

Prof. Dr. Duško Minić, born 1965, is a Full Professor at the Department of Technological Engineering, Faculty of Technical Sciences, University of Priština, Serbia. He graduated in 1993, obtained his MSc degree in 1997 and his PhD degree in 2002. His main fields of interest are phase diagrams of metallic systems and the characterization of materials (SEM-EDS, DTA, DSC, XRD, mechanical properties, electrical conductivity alloys and optical microscopy).

Assistant Prof. Dr. Milena Premović, born 1987, is Assistant Professor at the Department of Technological Engineering, Faculty of Technical Sciences, University of Priština, Kosovska Mitrovica, Serbia. She finished her PhD in 2015. Her research areas are materials, multiphase systems, free-lead solder materials, the thermodynamics of alloys, computational thermodynamics and characterization.

Prof. Dr.-Ing. Tamara Holjevac Grgurić, born 1971, is Associate Professor at the Department for Physical Metallurgy, Faculty of Metallurgy, University of Zagreb, Sisak, Croatia. She earned her PhD degree in 2016. Her main field of interest is the design and characterization of materials, thermal analysis, thermodynamics of metal materials and shape memory alloys.

Dr.-Ing. Nebojša Tadić, born 1969, works at the Faculty of Metallurgy and Technology at the Podgorica, University of Montenegro, Montenegro. He finished his PhD in 2011. His present scientific research is in the following areas: material processing with plastic deformation, the mechanical testing of materials and the modeling of heat processes.


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Published Online: 2019-01-18
Published in Print: 2018-12-04

© 2018, Carl Hanser Verlag, München