Determination of interfacial heat transfer coefficient and analysis of influencing factors in warm forming the third-generation automotive medium-Mn steel
Determination of interfacial heat transfer coefficient and analysis of influencing factors in warm forming the third-generation automotive medium-Mn steel
复制标题
第三代汽车中锰钢温成形界面传热系数测定及影响因素分析
DOI：
10.1016/j.icheatmasstransfer.2017.05.001
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发表时间：
2017-08
期刊：
影响因子：
--
通讯作者：
Han Dong
中科院分区：
文献类型：
--
作者：
Ying Chang;Xiaodong Li;Cunyu Wang;Guojun Zheng;Daxin Ren;Ping Hu;Han Dong
新开发的第三代汽车用中锰钢（TAMM钢）。该中Mn钢具有细而均匀的显微组织、低的淬火温度和宽的淬火速率范围的优点，从而可以有助于温/热成形中的优异性能、高效率和低成本。然而，对这种TAMM钢成形的研究才刚刚开始。有必要了解成形过程与传热的关系，并进一步将传热特性应用于数值模拟。为此，本文采用自行设计的实验平台，采用Beck反推法，对TAMM钢温成形过程中的界面传热规律进行了研究，并确定了界面传热系数（IHTC）。结果表明，在淬火过程中，IHTC不是常数，而是非线性变化的。研究了冲压压力、冲压温度、表面涂层等因素对IHTC的影响。IHTC随冲压压力和冲压温度的增加而增加。但随着涂层厚度的增加，其降低幅度较大。研究还发现，组织和力学性能对涂层和淬火速率不敏感，这有利于实现TAMM冲压件均匀的力学性能，有助于实际温冲压工艺中淬火方法和涂层应用的灵活设计。
The third-generation automotive medium-Mn steel (TAMM steel) was newly developed. The medium-Mn steel holds the advantages of fine and even microstructure, low austenizing temperature and wide quenching rate range, and thereby it is possible to contribute to excellent properties, high efficiency and low cost in warm/hot forming. However, research on the forming of this TAMM steel has just started. It is necessary to understand the relation between forming process and heat transfer, and further apply the heat transfer characteristics to numerical simulation. Therefore, this paper explored the interfacial heat transfer rules during warm forming the TAMM steel and determined the interfacial heat transfer coefficient (IHTC) using a self-designed experimental platform and Beck's inverse estimation method. The results indicate that the IHTC is not constant but varies nonlinearly during quenching. Moreover, the influences of several factors, including stamping pressure, stamping temperature and surface coating, on the IHTC were investigated. The IHTC increases with the increase of stamping pressure and stamping temperature. However, it decreases greatly with the increase of coating thickness. It is also found that the microstructure and mechanical properties are not sensitive to the coating and quenching rate, which is beneficial to the achievement of even mechanical properties of the stamped TAMM part, and helpful to the flexible design of quenching method and coating application in actual warm stamping process.
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影响因子：
4.1
作者：
Mori, K.;Okuda, Y.
通讯作者：
Okuda, Y.
影响因子：
2.3
作者：
Shoumei Xiong
通讯作者：
Shoumei Xiong
影响因子：
9.7
作者：
R. Buczkowski;M. Kleiber
通讯作者：
R. Buczkowski;M. Kleiber
DOI：
10.1016/j.ijmachtools.2011.12.005
发表时间：
2012-05
影响因子：
14
作者：
Q. Bai;Jianguo Lin;L. Zhan;T. Dean;D. Balint;Z. Zhang
通讯作者：
Q. Bai;Jianguo Lin;L. Zhan;T. Dean;D. Balint;Z. Zhang
DOI：
10.1016/0017-9310(96)00034-8
发表时间：
1996-11-01
影响因子：
5.2
作者：
Beck, JV;Blackwell, B;HajiSheikh, A
通讯作者：
HajiSheikh, A