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首页> 外文期刊>Materials Science and Engineering >Microstructure-mechanical property relationship and austenite stability in medium-Mn TRIP steels: The effect of austenite-reverted transformation and quenching-tempering treatments
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Microstructure-mechanical property relationship and austenite stability in medium-Mn TRIP steels: The effect of austenite-reverted transformation and quenching-tempering treatments

机译：中锰TRIP钢的组织力学性能关系和奥氏体稳定性：奥氏体回复相变和淬火回火处理的影响

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摘要

In the present study, we fundamentally explore the reasons underlying differences in mechanical properties in hot-rolled 0.2C-1.6Al-6.1Mn-Fe TRIP steels subjected to different heat treatments. Comparing with austenite reverted transformation annealing (ART) process, quenching and tempering (Q&T) process was effective in obtain excellent mechanical properties. [Q&T (UTS: 902-1235 MPa, TEL: 18-42%]; [ART (UTS: 885-945MPa, TEL: 13-28%)]. In the ART process, long time annealing led to excessive C and Mn enrichment in austenite, which rendered austenite too stable and deteriorated TRIP effect. Furthermore, long time annealing reduced dislocation density and led to low work-hardening rate. The Q&T process enabled appropriate enrichment of elements and hence desired stability for significant TRIP effect to be observed. Thus, the steel quenched from 625 ℃ exhibited best combination of mechanical properties (UTS: 1038 MPa, TEL: 42%, UTSxTEL: 43.6 GPa%) because of significant contribution of TRIP effect and high dislocation density in austenite.
机译：在本研究中，我们从根本上探讨了经受不同热处理的热轧0.2C-1.6Al-6.1Mn-Fe TRIP钢机械性能差异的根本原因。与奥氏体相变退火（ART）工艺相比，淬火和回火（Q＆T）工艺有效地获得了优异的机械性能。 [Q＆T（UTS：902-1235 MPa，TEL：18-42％]; [ART（UTS：885-945MPa，TEL：13-28％）]。在ART工艺中，长时间的退火导致过量的C和Mn奥氏体富集，使奥氏体太稳定并降低了TRIP效果；长时间退火降低了位错密度，导致加工硬化率低； Q＆T工艺使元素得以适当富集，因此可以观察到所需的稳定性，从而具有显着的TRIP效果因此，由于TRIP效应和奥氏体中高位错密度的显着贡献，从625℃淬火的钢表现出最佳的力学性能组合（UTS：1038 MPa，TEL：42％，UTSxTEL：43.6 GPa％）。

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  • 来源
    《Materials Science and Engineering》 |2017年第13期|211-219|共9页
  • 作者

    Z.C. Li; H. Ding; R.D.K. Misra; Z.H. Cai;

  • 作者单位

    School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China,Laboratory for Excellence in Advanced Steel Research, Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso,El Paso, TX 79968, USA;

    School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China;

    Laboratory for Excellence in Advanced Steel Research, Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso,El Paso, TX 79968, USA;

    School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China;

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  • 正文语种 eng
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  • 关键词

    ART; QT; Mechanical properties; Austenite stability; TRIP effect;

    机译：艺术;Q＆T;机械性能奥氏体稳定性;跳闸效果;

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