INVESTIGATION ON PHASE COMPOSITION AND MICROSTRUCTURE OF HIGH CHROMIUM WHITE CAST IRONS ALLOYED WITH BORON

Authors

  • Julieta Kaleicheva Institute of Metal Science, Equipment and Technologies with the Center for Hydro- and Aerodynamics “Acad. A. Balevski”, Bulgarian Academy of Sciences (BG)
  • Rumyana Lazarova Institute of Metal Science, Equipment and Technologies with the Center for Hydro- and Aerodynamics “Acad. A. Balevski”, Bulgarian Academy of Sciences (BG)
  • Georgi Avdeev Institute of Physical Chemistry, Bulgarian Academy of Sciences (BG)
  • Valentin Mishev Faculty of Industrial Technology, Technical University of Sofia (BG)
  • Zdravka Karaguiozova Space Research and Technology Institute, Bulgarian Academy of Sciences (BG)
  • Krassimir Kirov College Sliven, Technical University of Sofia (BG)

DOI:

https://doi.org/10.17770/etr2024vol3.8162

Keywords:

high chromium white cast iron, boron, hardness, impact toughness, X-Ray Diffraction (XRD)

Abstract

The microstructure and phase composition of high chromium white cast iron with composition: 2.6÷3.1%C; 0.88÷1.12%Si; 0.74÷0.98% Mn; 0.85÷1.16% Mo; 11.11÷14.11% Cr, additionally doped with boron in an amount 0.002%, 0.92% and 1.34% is investigated. The microstructure of the white cast irons was studied by optical metallographic analysis, and the phase composition – by qualitative XRD analysis. An impact toughness test was conducted. The hardness HRC was tested by the Rockwell method. The microhardness HV0.1 of the metal matrix and of the carbide phase was determined. It was found that in samples containing boron, the amount of the carbide phase increases and the chromium boride phase Cr3B4 appears in them. This results in a decrease in impact toughness from 1.88 J/cm2 for the sample with 0.002% boron to 0.98 J/cm2 with 0.92% boron and 0.68 J/cm2 with 1.34% boron. The samples containing 0.92% and 1.34% boron have a higher microhardness of the metal base (824 and 766 HV0.1) compared to those with 0.002% boron (672 HV0.1).

 

Supporting Agencies
The authors would like to thank the Research and Development Sector at the Technical University of Sofia for the financial support.

Downloads

Download data is not yet available.

References

A. Nufal, “Metallurgical Aspects of High- Chromium White Irons”, [Online]. Available: https://www.foundry-planet.com/fileadmin/redakteur/pdf-dateien/13-Adel-Nofal.pdf [Accessed: March 1, 2024].

Kh. Abdel-Aziz, M. El-Shennawy and Adel A. Omar, “Microstructural Characteristics and Mechanical Properties of Heat Treated High-Cr White Cast Iron Alloys”, International Journal of Applied Engineering Research, vol. 12, number 14, p. 4675-4686, 2017. [Online]. Available: ResearchGate, https://www.ripublication.com/ijaer17/ijaerv12n14_79.pdf [Accessed March 1, 2024].

Abd El-Aziz, K., Zohdy, K., Saber, D. et al. “Wear and Corrosion Behavior of High-Cr White Cast Iron Alloys in Different Corrosive Media”, Journal of Bio- and Tribo-Corrosion, vol.1, article number 25 (2015). [Online]. Available: SpringerLink, https://doi.org/10.1007/s40735-015-0026-8 [Accessed March 1, 2024].

F. Nurjaman, S. Sumardi, A. Shofi, M. Aryati, and B. Suharno, “Effect of molybdenum, vanadium, boron on mechanical properties of high chromium white cast iron in as-cast condition”, AIP Conference Proceedings 1711, 020005, 2016, [Online]. Available: ResearchGate, https://aip.scitation.org/doi/pdf/10.1063/1.4941614 [Accessed March 1, 2024], https://doi.org/10.1063/1.4941614

A. Bedolla-Jacuinde, F. V. Guerra, I. Mejía, J. Zuno-Silva and C. Maldonado,” Boron Effect on the Precipitation of Secondary Carbides During Destabilization of a High-Chromium White Iron”, 10th International Symposium on the Science and Processing of Cast Iron – SPCI10, 2014. [Abstract]. Available: ResearchGate, https://www.researchgate.net/publication/271829525 [Accessed March 1, 2024], https://doi.org/10.1080/13640461.2016.1142236

S. Tomovic-Petrovic, S. Markovic and S. Zec, “The effect of boron on the amount and type of carbides in chromium white irons”, Journal of the Serbian Chemical Society, vol. 67(10), p.697-707, 2002. [Online]. Available: ResearchGate, https://www.doiserbia.nb.rs/img/doi/0352-5139/2002/0352-51390210697T.pdf [Accessed March 1, 2024], https://doi.org/10.2298/JSC0210697T

Zhongli Liu, Yanxiang Li, Xiang Chen, Kaihua Hu, “Microstructure and mechanical properties of high boron white cast iron”, Materials Science and Engineering: A, vol.486, issues 1–2, p. 112-116, 2008, ISSN 0921-5093,[Abstract]. Available: ScienceDirect, https://www.sciencedirect.com/science/article/pii/S0921509307017273 [Accessed March 1, 2024], https://doi.org/10.1016/j.msea.2007.10.017

A. Bedolla-Jacuinde, F.V. Guerra, A.J. Guerrero-Pastran, M.A. Sierra-Cetina, S. Valdez-Medina,” Microstructural effect and wear performance of high chromium white cast iron modified with high boron contents”, Wear, vol.476, 203675, 2021, ISSN 0043-1648, [Abstract]. Available: ScienceDirect,https://www.sciencedirect.com/science/article/pii/S0043164821000648 [Accessed March 1, 2024],

https://doi.org/10.1016/j.wear.2021.203675

J. Kaleicheva, K. Kirov, V. Mishev and Z. Karaguiozova, “Microstructure and Properties of High Chromium White Cast Irons Alloyed with Boron”, Proceedings of the 13th Internacional Scientific and Practical Conference: Environment, Technology, Resources, Rezekne, Latvia,vol. 3, p.137-141, 2021. [Online]. Available: http://journals.rta.lv/index.php/ETR

[Accessed March 1, 2024], https://doi.org/10.17770/etr2021vol3.6656

J. Kaleicheva, K. Kirov, V. Mishev, R. Lazarova, Z.Karaguiozova, “Effect of boron on the wear behavior of high chromium white cast irons”, Proceedings of the 14th Internacional Scientific and Practical Conference: Environment, Technology, Resources, Rezekne, Latvia,vol. 3, p.119-123, 2023. [Online]. Available:https://journals.rta.lv/index.php/ETR/article/view/7294/6003

[Accessed March 1, 2024] , https://doi.org/10.17770/etr2023vol3.7294

Downloads

Published

2024-06-22

Issue

Vol. 3 (2024): Environment. Technology. Resources. Proceedings of the 15th International Scientific and Practical Conference. Volume 3

Section

Engineering Sciences and Production Technologies

License

Copyright (c) 2024 Julieta Kaleicheva, Rumyana Lazarova, Georgi Avdeev, Valentin Mishev, Zdravka Karaguiozova, Krassimir Kirov

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
J. Kaleicheva, R. Lazarova, G. Avdeev, V. Mishev, Z. Karaguiozova, and K. Kirov, “INVESTIGATION ON PHASE COMPOSITION AND MICROSTRUCTURE OF HIGH CHROMIUM WHITE CAST IRONS ALLOYED WITH BORON”, ETR, vol. 3, pp. 123–126, Jun. 2024, doi: 10.17770/etr2024vol3.8162.