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<p>This study investigates the role of Cr content on the microstructure and mechanical properties of three different steel grades (P265, X10, and X22) with varying Cr content upon subjecting them to boriding treatment at 900–1000&#xa0;°C for 8&#xa0;h. The presence of borided layer was observed in all three steel grades. The variations in layer kinetics, morphology, and other microstructural features are explained based on the Cr content present in these steels. X-ray diffraction revealed the formation of chromium borides in X10 and X22 alloyed steels along with iron borides in P265 steel. Energy-dispersive spectroscopy revealed the partitioning of Cr between the boride layer and substrate in X10 and X22 steel grades. Detrimental effects on the fracture toughness and layer adhesion with substrate in X10 and X22 steels were explained based on the higher Cr contents when compared to low Cr containing P265 steel.</p>

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Role of Chromium on the Boriding Characteristics of P265, X10, and X22 Steels

  • 期刊论文

  • 发表日期：

    2025年12月20日

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  • S. Rana,
  • N. Jagadeesh,
  • A. S. Yadav,
  • S. R. Meka

摘要

This study investigates the role of Cr content on the microstructure and mechanical properties of three different steel grades (P265, X10, and X22) with varying Cr content upon subjecting them to boriding treatment at 900–1000 °C for 8 h. The presence of borided layer was observed in all three steel grades. The variations in layer kinetics, morphology, and other microstructural features are explained based on the Cr content present in these steels. X-ray diffraction revealed the formation of chromium borides in X10 and X22 alloyed steels along with iron borides in P265 steel. Energy-dispersive spectroscopy revealed the partitioning of Cr between the boride layer and substrate in X10 and X22 steel grades. Detrimental effects on the fracture toughness and layer adhesion with substrate in X10 and X22 steels were explained based on the higher Cr contents when compared to low Cr containing P265 steel.