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<p>Bimetallic composites combining high-chromium white cast iron (HCWCI) and HY-80 steel offer an attractive balance of wear resistance and toughness; however, their fabrication is often limited by the poor weldability of the HCWCI. To overcome this limitation, a simultaneous liquid–liquid casting technique was used to produce a sound metallurgical bond between the two alloys, followed by heat treatment to optimize the microstructures. Microstructural characterization revealed a continuous, defect-free interface without pores or inclusions. Microhardness profiling across the interface revealed a smooth transition in the mechanical properties, and three-point bending tests confirmed the mechanical integrity of the joint under both loading configurations. These results demonstrate that liquid–liquid casting, combined with an appropriate heat treatment, enables the reliable production of HCWCI/HY-80 composites with effective property transfer across the interface. This approach provides a promising route for manufacturing wear and impact-resistant components in the mining industry.</p> Graphical abstract <p></p>

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Microstructural and mechanical characterization of a liquid–liquid casting bimetallic composite of HY-80 steel and high-chromium white cast iron

  • 期刊论文

  • 发表日期：

    2025年12月15日

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  • Josué Quintero-Ortiz,
  • Arnoldo Bedolla-Jacuinde,
  • María Trinidad Beltz-Pérez,
  • Francisco Vapeani Guerra-López,
  • Adán Zárate-Rangel

摘要

Bimetallic composites combining high-chromium white cast iron (HCWCI) and HY-80 steel offer an attractive balance of wear resistance and toughness; however, their fabrication is often limited by the poor weldability of the HCWCI. To overcome this limitation, a simultaneous liquid–liquid casting technique was used to produce a sound metallurgical bond between the two alloys, followed by heat treatment to optimize the microstructures. Microstructural characterization revealed a continuous, defect-free interface without pores or inclusions. Microhardness profiling across the interface revealed a smooth transition in the mechanical properties, and three-point bending tests confirmed the mechanical integrity of the joint under both loading configurations. These results demonstrate that liquid–liquid casting, combined with an appropriate heat treatment, enables the reliable production of HCWCI/HY-80 composites with effective property transfer across the interface. This approach provides a promising route for manufacturing wear and impact-resistant components in the mining industry.

Graphical abstract