Quenching and tempering of 51CrV4 (SAE-AISI 6150) steel via medium and low frequency induction

Can Civi; Metin Yurddaskal; Enver Atik; Erdal Celik

doi:10.3139/120.111196

Article

Quenching and tempering of 51CrV4 (SAE-AISI 6150) steel via medium and low frequency induction

Can Civi , Metin Yurddaskal , Enver Atik and Erdal Celik

Published/Copyright: November 15, 2018

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From the journal Materials Testing Volume 60 Issue 6

Abstract

Mechanical and microstructural properties of quenched steel are directly related to tempering time and temperature. In many applications, conventionally quenched and tempered steel is widely used for acquiring high strength and toughness. The present study was carried out to investigate the variation in mechanical properties, observation of diminished energy consumption and evaluation of the microstructural properties in SAE-AISI 6150 steel components by induction heating, compared with those of steel tempered by conventional method. Induction quenched and tempered steel provides a shorter process time, less energy consumption and improved mechanical properties through the inhibition of grain growth. In this study, quenching and tempering processes were carried out on medium and low frequency induction units and by using a conventional electrical resistance furnace for the sake of comparison. It was observed that cementite particles began changing their shape from spherical to fine-grained in the induction tempered samples. The sample tempered by low frequency induction manifests superior mechanical properties and offers a potential advantage for significant cost savings.

Kurzfassung

Die mechanischen und mikrostruturellen Eigenschaften abgeschreckter Stähle sind direkt von den Anlasszeiten und -temperaturen abhängig. Konventionell abgeschreckte und angelassene Stähle werden vielfach angewandt, um eine hohe Festigkeit und Zähigkeit zu erhalten. Die diesem Beitrag zugrunde liegende Studie wurde durchgeführt, um die Veränderung der mechanischen Eigenschaften zu untersuchen, einen niedrigeren Energieverbrauch zu beobachten und die mikrostrukturellen Eigenschaften in induktions-wärmebehandelten Komponenten aus dem Stahl SAE-AISI 6150 im Vergleich zu solchen mit einer konventionellen Wärmebehandlung zu evaluieren. Induktiv abgeschreckte und angelassene Stähle weisen niedrigere Herstellungszeiten, einen geringeren Energieverbrauch bei der Herstellung und höhere mechanische Eigenschaften auf, da hierbei Kornwachstum verhindert wird. In der Studie wurden Abschreck- und Anlassprozesse mittels Induktionseinrichtungen bei mittlerer und niedriger Frequenz Im Vergleich mit einem konventionellen Widerstandsofen durchgeführt. Es stellte sich heraus, dass die Zementitpartikel in den induktions-wärmebehandelten Proben beginnen, ihre Form von kugelig zu einer feinkörnigen Struktur zu verändern. Die Probe, die mit einer niedrigen Induktionsfrequenz wärmebehandelt wurde, zeigte überragende mechanische Eigenschaften und einen potentiellen Vorteil bezüglich signifikanter Kosteneinsparungen.

*Correspondence Address, Dr. Metin Yurddaskal, Department of Metallurgical and Material Engineering, Dokuz Eylul University, 35390 Izmir, Turkey, E-mail: metin.yurddaskal@deu.edu.tr

Dr. Can Civi, born in in 1987, graduated from Celal Bayar University, Manisa, Turkey in 2009 with a degree in Mechanical Engineering. He completed his Master of Science thesis as well as his PhD thesis at the Department of Mechanical Engineering of Celal Bayar University in 2011 and 2016, respectively. He has been working as an assistant professor in Department of Mechanical Engineering at Celal Bayar University in Manisa.

Dr. Metin Yurddaskal, born in 1989, graduated from Dokuz Eylul University, Izmir, Turkey in 2011 with a first degree in Metallurgical and Materials Engineering. He completed his Master of Science thesis and his PhD thesis at the Department of Metallurgical and Materials Engineering in 2014 and 2017, respectively. He has been working as an assistant professor in the Department of Metallurgical and Materials Engeneering at Dokuz Eylul University in Izmir. He works on composite materials, nanoparticles, thin films and materials characterization.

Prof. Dr. Enver Atik, born in 1963. He graduated from Istanbul Technical University in 1984 with a degree in Mechanical Engineering. He completed his Master of Science in Mechanical Engineering at the Uludağ University, Bursa, Turkey in 1987. In 1994, he received his PhD also from that university. He has been working as a professor in the Mechanical Engineering Department at the Celal Bayar University, Manisa, Turkey.

Prof. Dr. Erdal Celik, born in 1967, graduated from Istanbul Technical University in 1993 with a degree in Metallurgical and Materials Engineering. He is now director of the Center for Fabrication and Applications of Electronic Materials and works as a professor at Dokuz Eylul University, Izmir, Turkey. He also works on nanotechnology, production techniques, electronic materials, materials characterization and thin films.

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Published Online: 2018-11-15

Published in Print: 2018-06-30

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https://doi.org/10.3139/120.111196