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<p>In this work, the effect of pre-quenching heat treatment time on the microstructure and mechanical properties of a Fe-0.19C-1.48Mn-1.43Si-0.16Al-0.79Ni-0.026Nb TRIP steel was investigated. It was found that combined pre-quenching heat treatment and two-stage heat treatment led to significant refinement of retained austenite (RA). As the pre-quenching heat treatment time increased from 1 to 10 minutes, the average grain sizes of ferrite and RA first decreased and then increased, while the mechanical stability of RA consistently enhanced. After pre-quenching at 875&#xa0;°C for 5 minutes followed by two-stage treatment, the 875Q-5-TRIP specimen achieved excellent mechanical properties with a total elongation (TEL) of 26.9%, an ultimate tensile strength (UTS) of 863&#xa0;MPa, and a product of UTS and TEL (PSE) of 23.2 GPa·%.</p>

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Effect of Pre-Quenching Heat Treatment Time on Microstructure and Mechanical Properties of a Low-Alloyed TRIP-Aided Steel

  • 期刊论文

  • 发表日期：

    2025年12月10日

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  • J. N. Huang,
  • J. X. Yang,
  • G. Y. Le,
  • P. Q. Dai,
  • H. X. Chen,
  • J. H. Si,
  • Z. Y. Tang

摘要

In this work, the effect of pre-quenching heat treatment time on the microstructure and mechanical properties of a Fe-0.19C-1.48Mn-1.43Si-0.16Al-0.79Ni-0.026Nb TRIP steel was investigated. It was found that combined pre-quenching heat treatment and two-stage heat treatment led to significant refinement of retained austenite (RA). As the pre-quenching heat treatment time increased from 1 to 10 minutes, the average grain sizes of ferrite and RA first decreased and then increased, while the mechanical stability of RA consistently enhanced. After pre-quenching at 875 °C for 5 minutes followed by two-stage treatment, the 875Q-5-TRIP specimen achieved excellent mechanical properties with a total elongation (TEL) of 26.9%, an ultimate tensile strength (UTS) of 863 MPa, and a product of UTS and TEL (PSE) of 23.2 GPa·%.