锻压技术

可淬火硼钢板热成形过程中的传热行为

英文标题：Heat transfer behavior in hot stamping of quenchable boron steel sheet

作者：王敏张春肖海峰李兵

关键词：可淬火硼钢板热成形传热有限元

分类号：

出版年,卷(期):页码：2014,39(1):29-34

摘要：

可淬火硼钢板热成形技术在汽车车身制造中的应用是实现汽车轻量化的重要途径，该成形过程中板料和模具之间的传热行为是实现板料精确成形所迫切需要解决的重要问题。本文考虑模内水道的冷却作用和随接触压力变化的板料-模具接触界面换热系数，基于ABAQUS建立了可淬火硼钢U形梁热弯曲过程有限元模型，研究了该过程中板料和模具之间的传热行为。研究结果表明：在高温成形过程中，板料底部区域和模具之间的传热迅速，并发生了马氏体相变。在保压淬火过程中，位于板料侧壁中部高温区的平均降温速率高于马氏体的临界转变速率，但淬火结束时其温度高于马氏体开始相变温度，因此未充分发生马氏体相变。

The application of hot stamping of quenchable boron steel sheet (QBSS) to the automobile body manufacturing is an important way to realize lightweight of automobile. It is an urgent subject to study the heat transfer behavior between the sheet and dies in hot forming of QBSS. Taking the U-shaped part as the object, a finite element (FE) model of hot bending of QBSS was established based on ABAQUS, considering of the cooling waterway of dies and the sheet-die contact interface heat transfer coefficient being changed with contact pressure. The heat transfer behavior between the sheets and dies in the hot stamping process was revealed. The results show that the bottom of the sheet has a rapid heat transfer to dies and thus martensite phase transition (MPT) has happened in the forming process, while in the quenching process, the middle of side wall of the sheet with higher temperature has an average temperature drop rate which is higher than the martensitic critical transition rate, but its temperature after quenching is higher than the temperature for MPT, so MPT is not adequate.

基金项目：

国家自然科学基金资助项目（51205116, 50905056）；材料成形与模具技术国家重点实验室开放基金资助项目（2012-P12）；校博士科研基金（BK201102）

王敏（1979-），女，博士，副教授

参考文献：

[1]湖北省社会科学院. 湖北经济社会发展年度报告(2010)[M]. 武汉：湖北人民出版社, 2010.

Hubei Academy of Social Sciences. Hubei Economic and Social Development in the Annual Report (2010)[M]. Wuhan: Hubei Peoples Publishing House, 2010.

[2]Senuma T. Physical metallurgy of modern high strength steel sheets[J]. ISU International, 2001, 41(6): 520-532.

[3]张旭, 周杰. 超高强度钢防撞梁热成形改冷冲压工艺设计及优化[J]. 重庆大学学报, 2011, 34 (1): 77-81.

Zhang Xu, Zhou Jie. Optimization and springback control of ultra-high strength steel anti-collision side beam forming process[J]. Journal of Chongqing University, 2011, 34 (1): 77-81.　

[4]马宁, 胡平, 闫康康,等. 高强度硼钢热成形技术研究及其应用[J]. 机械工程学报, 2010, 46(14): 68-72.

Ma Ning, Hu Ping, Yan Kangkang, et al. Research on boron steel for hot forming and its application[J]. Journal of Mechanical Engineering, 2010, 46(14): 68-72.

[5]Tekkaya A E, Karbasian H, Homberg W, et al. Thermo-mechanical coupled simulation of hot stamping components for process design[J]. Computer Aided Engineering, 2007, 1(1): 85-89.

[6]Naganathan A. Hot Stamping of Manganese Boron Steel[D]. Columbus: The Ohio State University, 2010.

[7]Liu H S, Liu W, Bao J, et al. Numerical and experimental investigation into hot forming of ultra high strength steel sheet[J]. Journal of Materials Engineering and Performance, 2011, 20(1): 1-10.

[8]Xing Z W, Bao J, Yang Y Y. Numerical simulation of hot stamping of quenchable boron steel[J]. Materials Science and Engineering A, 2009, 499: 28-31.

[9]Cui J J, Lei C X, Xing Z W, et al. Predictions of the mechanical properties and microstructure evolution of high strength steel in hot stamping [J]. Journal of Materials Engineering and Performance, 2012, 21(11): 2244-2254.

[10]Merklein M, Lechler J. Investigation of the thermo-mechanical properties of hot stamping steels [J]. Materials Processing Technology, 2006, 177: 452-455.

[11]熊惟皓, 周理. 中国模具工程大典:第2卷—模具材料及热处理[M]. 北京：电子工业出版社, 2007.

Xiong Weihao, Zhou Li. China Mold and Die Engineering Award:Second Volume—Die Material and Heat Treatment [M]. Beijing: Electronic Industry Press, 2007.

[12]杨世铭, 陶文铨. 传热学[M].4版. 北京：高等教育出版社, 2006.

Yang Shiming, Tao Wenquan. Heat Transfer Theory. 4th Edition[M]. Beijing: Higher Education Press, 2006.

服务与反馈：

【文章下载】【加入收藏】