A comparative study on determination method of heat transfer coefficient using inverse heat transfer and iterative modification
A comparative study on determination method of heat transfer coefficient using inverse heat transfer and iterative modification
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DOI：
10.1016/j.jmatprotec.2008.10.016
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发表时间：
2009-06-01
影响因子：
6.3
通讯作者：
Shirayori, Atsushi
中科院分区：
文献类型：
--
作者：
Sugianto, Arif;Narazaki, Michiharu;Shirayori, Atsushi
热处理钢零件的变形控制是淬火工艺处理硬化时的主要考虑因素。在实施该热处理工艺之前，必须通过实验和计算机模拟来预测变形，以确定给出较小变形的淬火工艺。利用集总热容迭代修正法（LumpHC）和传热反求法（InvHT）计算了SUS 304圆柱体随温度变化的传热系数（HTC）。LumpHC需要根据银探针预测HTC，而InvHT需要初始假设集。然后，将从SUS 304气缸估计的基于区域的HTC应用于S45 C气缸。两种方法的预测精度结果进行了评估。正如预期的那样，搅拌淬火比静止淬火产生更少的变形。与lnvHT相比，使用LumpHC可以更准确地预测冷却曲线、冷却速率曲线和变形。所有分析均通过DEFORM-HT 21进行。(C)2008 Elsevier B. V.保留所有权利。
The distortion control of heat-treated steel parts is a main consideration when dealing with hardening by quenching process. Before implementing this heat treating process, prediction of distortion is necessary to be done by experiment and computer simulation for determining a quenching technique which gives the smaller distortion. Temperature-dependent heat transfer coefficient (HTC) estimated from SUS304 cylinder can be determined by both iterative modification of lumped heat capacity method (LumpHC) and inverse heat transfer method (InvHT). Predicted HTC from silver probe is needed for the LumpHC, whereas initial set of assumption is needed for the InvHT. The zone-based HTC estimated from SUS304 cylinder then is employed on S45C cylinder. The prediction accuracy results from both methods are evaluated. As expected, stir quenching gives less distortion than that of still quenching. More accurate prediction of cooling curves, cooling rate curves, and distortion is achieved by employing the LumpHC than that by the lnvHT. All analyses were performed by DEFORM-HT 21). (C) 2008 Elsevier B.V. All rights reserved.