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<p>Bimetallic composites are gaining attention for their ability to combine the distinct properties of core and cladding materials within a single component. In this study, a GCr15/45 carbon steel bimetallic ingot was fabricated using a liquid–solid casting approach under vacuum induction melting conditions. The temperature distribution and elemental diffusion behavior at the bonding interface were investigated through numerical simulation, thermodynamic modeling and experimental validation. Simulations were performed using a finite element casting model, and diffusion kinetics were evaluated using DICTRA calculations. The results confirmed the formation of a sound metallurgical bond between the 45 carbon steel core and the GCr15 steel outer layer. Simulated thermal profiles showed close agreement with experimental temperature measurements. The chromium diffusion distance predicted by DICTRA (~&#xa0;20&#xa0;µm) was comparable to the experimentally observed value (~&#xa0;35&#xa0;µm). The research approaches and methodologies in this study will serve as a valuable reference for bimetallic liquid–solid composite casting.</p>

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Temperature Distribution and Element Migration of the Bimetallic Ingot’s Interfacial Zone Produced by Liquid–Solid Composite Casting

  • 期刊论文

  • 发表日期：

    2025年10月23日

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  • Shiyi Peng,
  • Yulong Cao,
  • Lu Wang,
  • Longchao Liu,
  • Guangqiang Li

摘要

Bimetallic composites are gaining attention for their ability to combine the distinct properties of core and cladding materials within a single component. In this study, a GCr15/45 carbon steel bimetallic ingot was fabricated using a liquid–solid casting approach under vacuum induction melting conditions. The temperature distribution and elemental diffusion behavior at the bonding interface were investigated through numerical simulation, thermodynamic modeling and experimental validation. Simulations were performed using a finite element casting model, and diffusion kinetics were evaluated using DICTRA calculations. The results confirmed the formation of a sound metallurgical bond between the 45 carbon steel core and the GCr15 steel outer layer. Simulated thermal profiles showed close agreement with experimental temperature measurements. The chromium diffusion distance predicted by DICTRA (~ 20 µm) was comparable to the experimentally observed value (~ 35 µm). The research approaches and methodologies in this study will serve as a valuable reference for bimetallic liquid–solid composite casting.