• Julieta Kaleicheva Faculty of Industrial Technology, Technical University of Sofia
  • Krasimir Kirov Arsenal J.S.Co.
  • Valentin Plamenov Mishev Faculty of Industrial Technology, Technical University of Sofia
  • Zdravka Karaguiozova Space Research and Technology Institute, Bulgarian Academy of Sciences




high chromium white cast iron, boron, microhardness, hardness, impact toughness, bending strength


The microstructure and mechanical properties of high chromium white cast iron with composition: 2,6÷3,4% C; 0,9÷1,1% Si; 0,8÷1,1% Mn; 1,0÷1,3% Mo; 12,3÷13,4% Cr, additionally doped with boron in an amount of 0,18% to 1,25% is investigated. The microstructure of six compositions of white cast irons is studied by means of an optical metallographic analysis - one without boron, and the others contain 0,18%; 0,23%; 0,59%; 0,96% and 1,25% boron.

A test is performed to determine: hardness by the Rockwell method; microhardness; bending strength and impact toughness. It was found that at a boron content of 0,18%; 0,23% and 0,59%, the structure of white cast irons is subeutectic, with impact toughness in the range of 1,80÷1,52 J/cm2; with a boron content of 0,96%, the structure of white cast iron is close to the eutectic, with impact toughness 0,98 J/cm2 ; at a boron content of 1,25% the structure of white cast iron is supereutectic and the impact toughness decreases to 0,68 J/cm2.

With a change in the boron content from 0,8% to 1,25%, the amount of carbide phase in the structure of white cast iron increases, which leads to an increase in hardness from 53 to 59 HRC. The highest bending strength (Rmi=660,85 MPa) was obtained in white cast irons with a boron content of 0,23%.



Download data is not yet available.

Author Biography

  • Valentin Plamenov Mishev, Faculty of Industrial Technology, Technical University of Sofia
    Dept. of Materials Science and Technology Assist. Prof. VALENTIN MISHEV, PhD


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, vol.1711, №020005, February 2016. [Online]. Available: https://aip.scitation.org. [Accessed Sept. 28, 2020].

Xiang Chen, Yanxiang Li and Huiming Zhang, “Microstructure and mechanical properties of high boron white cast iron with about 4 wt% chromium”, Journal of Materials Science, vol.46, p.957–963, February 2016. [Online]. Available: https://www.researchgate.net. [Accessed Sept. 27, 2020].

A. Nofal, “Metallurgical Aspects of High- Chromium White Irons”, www.foundry-planet.com. [Online]. Available: https://www.foundry-planet.com/fileadmin/redakteur/pdf-dateien/13-Adel-Nofal.pdf. [Accessed Sept. 27, 2020].

Kh. Abd El-Aziz, Kh. Zohdy, D. Saber and H. E. M. Sallam, “Wear and Corrosion Behavior of High-Cr White Cast Iron Alloys in Different Corrosive Media”, Journal of Bio- and Tribo-Corrosion , vol.1, №25, August 2015. [Online]. Available: https://link.springer.com. [Accessed Sept. 25, 2020].

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”, International Journal of Cast Metals Research, vol.29, issue:1-2, p.55-61, February 2016.[Online].

Available: https://www.tandfonline.com. [Accessed Sept. 25, 2020].

S. Reyna, A. Bedolla-Jacuinde, F.V. Guerra, I. Mejía and M. García, “Effect of amount and distribution of primary TiC on the wear behavior of a 12%Cr-3%C white iron under dry sliding conditions”, Wear, №203718, February 2021.[Online]. https://www.researchgate.net. [Accessed March. 10, 2021].

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, №14, p.4675-4686, January 2017. [Online].

https://www.researchgate.net. [Accessed March. 2, 2021].

S. M. Tomovic-Petrovic, S. V. 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, January 2002. [Online]. https://www.researchgate.net. [Accessed Sept.. 28, 2020].

K. Ibrahim, ” Investigation of improving wear performance of hypereutectic 15% Cr-2% Mo white irons”, China Foundry, vol.7(4), p.438-446, November 2010. [Online]. https://www.researchgate.net. [Accessed Sept.. 29, 2020].

C. Scandian, C. Boher, J.D.B de Mello and F. Rezai-Aria,

“Effect of molybdenum and chromium contents in sliding wear of high-chromium white cast iron: The relationship between microstructure and wear”, Wear, vol.267, issues:1-4, p.401-408, May 2009.[Online]. https://www.sciencedirect.com. [Accessed Sept.. 29, 2020].

J.D.B. de Mello, A. A. Polycarpou,”Abrasive wear mechanisms of multi-components ferrous alloys abraded by soft, fine abrasive particles”, Wear , vol.269, issues:11–12, p.911-920, October 2010. [Online]. https://www.sciencedirect.com. [Accessed Sept.. 29, 2020].

V.P.Todorov, “Influence of the carbide phase on the mechanical and operational characteristics of bainitic cast irons”, Ph.D. dissertation, Technical University - Gabrovo, Gabrovo, Bulgaria, 2016.




How to Cite

J. Kaleicheva, K. Kirov, V. P. Mishev, and Z. Karaguiozova, “MICROSTRUCTURE AND PROPERTIES OF HIGH CHROMIUM WHITE CAST IRONS ALLOYED WITH BORON”, ETR, vol. 3, pp. 137–141, Jun. 2021, doi: 10.17770/etr2021vol3.6656.