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<p>This study investigates boron’s effect on 22MnB5 strip-cast steel. Sub-rapid solidified steels with high and low boron were prepared using dip tester simulations. High boron increased driving forces in theory, generating BN and (B, Ti)(C, N) complex precipitates in hot-rolled microstructures, which promoted ferrite formation, creating martensite/ferrite dual phases. Hereby, it induced the hot-rolling cracks and mechanical property deterioration. Conclusively, the boron addition promoted precipitation-induced phase transformations and processing defects in strip-cast hot-stamping steels.</p>

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Boron Induces Cracking in 22MnB5 Hot-Stamping Steel Produced by Strip Casting

  • 期刊论文

  • 发表日期：

    2025年5月15日

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  • Renyi Yang,
  • Haoyu Wang,
  • Wanlin Wang,
  • Chenyang Zhu,
  • Jie Zeng

摘要

This study investigates boron’s effect on 22MnB5 strip-cast steel. Sub-rapid solidified steels with high and low boron were prepared using dip tester simulations. High boron increased driving forces in theory, generating BN and (B, Ti)(C, N) complex precipitates in hot-rolled microstructures, which promoted ferrite formation, creating martensite/ferrite dual phases. Hereby, it induced the hot-rolling cracks and mechanical property deterioration. Conclusively, the boron addition promoted precipitation-induced phase transformations and processing defects in strip-cast hot-stamping steels.