<abstract xmlns="http://www.w3.org/1999/xhtml">Boriding of 34CrNiMo6 steel was performed in a solid medium consisting of Ekabor-II powders at 1123, 1173 and 1223 K for 2, 4 and 6 h. Morphological and kinetic examinations of the boride layers were carried out by optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The thicknesses of the boride layers ranged from 22±2.3 to 145±4.1 depending on boriding temperature and time. The hardness of boride layer was about 1857 HV0.1 after boriding for 6 h at 1223 K, while the hardness of the substrate was only around 238 HV0.1. Growth rate constants were found to be between 1.2×10−13 – 9.8×10−13 m2/s depending on temperature. The activation energy for boron diffusion was estimated as 239.4±8.6 kJ mol−1. This value was comparable to the activation energies reported for medium carbon steels in the literature.</abstract>

Boriding of 34CrNiMo6 steel was performed in a solid medium consisting of Ekabor-II powders at 1123, 1173 and 1223 K for 2, 4 and 6 h. Morphological and kinetic examinations of the boride layers were carried out by optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The thicknesses of the boride layers ranged from 22±2.3 to 145±4.1 depending on boriding temperature and time. The hardness of boride layer was about 1857 HV0.1 after boriding for 6 h at 1223 K, while the hardness of the substrate was only around 238 HV0.1. Growth rate constants were found to be between 1.2×10−13 – 9.8×10−13 m2/s depending on temperature. The activation energy for boron diffusion was estimated as 239.4±8.6 kJ mol−1. This value was comparable to the activation energies reported for medium carbon steels in the literature.

Metallurgical Characterization and Kinetics of Borided 34CrNiMo6 Steel

Faculty of Arts and Sciences, Department of Physics

Faculty of Technology, Mechanical Engineering, Isparta

Advances in Materials Science

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Metallurgical Characterization and Kinetics of Borided 34CrNiMo6 Steel"}

Boriding of 34CrNiMo6 steel was performed in a solid medium consisting of Ekabor-II powders at 1123, 1173 and 1223 K for 2, 4 and 6 h. Morphological and...

Metallurgical Characterization and Kinetics of Borided 34CrNiMo6 Steel

Published Online: Dec 31, 2020

Page range: 38 - 48

DOI: https://doi.org/10.2478/adms-2020-0021

Keywords
Boriding, 34CrNiMo6 steels, boride layer, Ekabor II, growth rate constants, activation energy

© 2020 N. Ucar et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Metallurgical Characterization and Kinetics of Borided 34CrNiMo6 Steel

Published Online: Dec 31, 2020

Page range: 38 - 48

DOI: https://doi.org/10.2478/adms-2020-0021

KeywordsBoriding, 34CrNiMo6 steels, boride layer, Ekabor II, growth rate constants, activation energy

© 2020 N. Ucar et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Boriding, 34CrNiMo6 steels, boride layer, Ekabor II, growth rate constants, activation energy