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首页> 外文期刊>Journal of Heat Transfer >Development and Validation of a Thermometallurgical Model for Furnace-Based Austenitization During Hot Stamping
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Development and Validation of a Thermometallurgical Model for Furnace-Based Austenitization During Hot Stamping

机译：热冲压过程中基于炉的奥氏体化的热冶金模型的开发和验证

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摘要

In hot-forming die-quenching (HFDQ) boron manganese steel blanks are heated within a roller hearth furnace, and then simultaneously quenched and formed into fully martensitic body-in-white components. Industry needs models that can predict the instantaneous temperature and austenite phase fraction within the roller furnace to diagnose problems (e.g., incomplete austenitization), forecast costs, and optimize process settings. This paper introduces a thermometallurgical model for Al-Si coated 22MnB5, consisting of a coupled heat transfer and austenitization submodels. Two candidate austenitization submodels are considered: an empirical first-order model and a model based on the detailed austenitization kinetics. In the case of the first-order model, a detailed Monte Carlo procedure is used to construct 95% credibility intervals for the blank temperature and austenite phase fraction that accounts for uncertainties in the furnace temperature and model parameters. The models are first assessed using temperature and austenite phase fractions from Al-Si coated 22MnB5 coupons heated in a laboratory-scale muffle furnace, and then used to simulate austenitization of patched blanks within an industrial roller hearth furnace. The results show that the empirical first-order model provides a more robust estimate of austenite phase fraction compared to the detailed model.
机译：在热成型模淬（HFDQ）中，将硼锰钢坯料在辊底炉中加热，然后同时淬火并形成完全马氏体的白车身部件。工业界需要能够预测辊式炉内的瞬时温度和奥氏体相分数的模型，以诊断问题（例如，不完全的奥氏体化），预测成本并优化工艺设置。本文介绍了Al-Si涂层22MnB5的热冶金模型，该模型由传热和奥氏体耦合子模型组成。考虑了两个候选奥氏体化子模型：一个经验一阶模型和一个基于详细奥氏体化动力学的模型。在一阶模型的情况下，详细的蒙特卡洛程序用于为坯料温度和奥氏体相分数构建95％的可信区间，该区间解释了炉温和模型参数的不确定性。首先使用在实验室规模的马弗炉中加热的Al-Si涂层的22MnB5试样的温度和奥氏体相分数对模型进行评估，然后将其用于模拟工业辊底式炉内修补毛坯的奥氏体化。结果表明，与详细模型相比，经验一级模型对奥氏体相分数提供了更可靠的估计。

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  • 来源
    《Journal of Heat Transfer》 |2019年第6期|062101.1-062101.10|共10页
  • 作者

    Verma M.; Yan H.; Culham J. R.; Di Ciano M.; Daun K. J.;

  • 作者单位

    Univ Waterloo, Dept Mech & Mechatron Engn, 200 Univ Ave W, Waterloo, ON N2L 3G1, Canada;

    Univ Waterloo, Dept Mech & Mechatron Engn, 200 Univ Ave W, Waterloo, ON N2L 3G1, Canada;

    Univ Waterloo, Dept Mech & Mechatron Engn, 200 Univ Ave W, Waterloo, ON N2L 3G1, Canada;

    Univ Waterloo, Dept Mech & Mechatron Engn, 200 Univ Ave W, Waterloo, ON N2L 3G1, Canada;

    Univ Waterloo, Dept Mech & Mechatron Engn, 200 Univ Ave W, Waterloo, ON N2L 3G1, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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