锻压技术

基于热力相变耦合的轻量化B柱热冲压成形全过程仿真

英文标题：Simulation of lightweight Bpillar during hot stamping process with thermo-mechanicalmetallurgical model

作者：桂中祥张宜生王子健

单位：华中科技大学

分类号：TH16

出版年,卷(期):页码：2012,37(6):193-197

摘要：

为深入研究超高强度钢板热冲压成形工艺，采用热力相变耦合分析方法，建立B柱热冲压模型，进行成形工艺全过程仿真。分析加热、送料、冲压成形、淬火冷却等工艺环节中板坯的热力学及相变行为，给出了板料温度、厚度、组织等变化的分布规律，为热冲压模具设计及工艺参数优化提供理论依据。提出通过合理控制冷却速率，获得多相组织混合产物，满足强度和塑性相结合的需求，改善热成形零件的综合力学性能。模拟结果与实验较吻合，表明所建立的热力相变耦合模型是可靠的。

In order to deeply investigate the hot stamping process, FE model of a Bpillar was established based on thermomechanicalmetallurgical coupled analysis method. Simulation of the whole process was conducted, thermodynamic behavior and phase transformations of the blank during different steps, such as heating, feeding,forming,quenching were observed. Distribution of the temperature, thickness, microstructures, ect. of the sheet metal were obtained for the purpose of providing some theoretical proofs for hot stamping tools designing and optimization of processing parameters. Controlling the cooling rate reasonably was proposed for getting a mixture of multiphase microstructures to meet the needs of a combination of strength and ductility, finally to improve the mechanical properties of part. Simulation results agreed with the experimental data which shows that the thermomechanicalmetallurgical coupled model is reliable.

基金项目：

参考文献：

［1］徐虹，沈永波，孟佳,等.热冲压成形车门防撞梁组织和性能研究[J].锻压技术，2011，36(6)：24-27.
［2］马宁，申国哲，张宗华，等.高强度钢板热冲压材料性能研究及在车身设计中的应用[J].机械工程学报，2011，47(8)：60-65.
［3］王立影，王芝斌.热冲压成形零件质量控制因素分析[J].锻压技术，2010，35(2)：117-119.
［4］张志强.B柱热冲压数值分析研究[J].锻压技术，2010，35(3)：57-60.
［5］姜超，单忠德，庄百亮，等.热冲压成形22MnB5钢板的组织和性能[J].材料热处理学报，2012，33(3)：78-81.
［6］MyoungGyu Lee，SungJoon Kim，Heung Nam Han，et al. Application of hot press forming process to manufacture an automotive part and its finite element analysis considering phase transformation plasticity[J].International Journal of Mechanical Sciences，2009，(51)：888-898.
［7］Barc Ello Na A，Pa Lmeri D. Effect of plastic hot deformation on the hardness and continuous cooling transformations of 22MnB5 microalloyed boron steel[J].Metallurgical and Materials Transctions A，2009,(40A)： 1160-1174.
［8］Alberto Turetta.Investigation of thermal，mechanical and microstructural properties of quenchenable high strength steels in hot stamping operations[D].Padova:University of Padova，2008.
［9］Paul kerstr m.Modelling and Simulation of Hot Stamping[D].Lule:Lule University of Technology，2006.
［10］蔡玉俊，王玉广，李国和,等.超高强度钢板热冲压成形CAE技术的研究现状与发展趋势[J].锻压技术，2011，36(4)：7-11.
［11］Griesbach B ，Hora P . Continuous press hardening[A]. 7th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes[C]. Interlaken，Switzerland，2008.
［12］LS-DYNA Keyword User's Manual(Version 971)[M]. USA:Livermore Software Technology Corp,2011.
［13］David Lorenz.Simulation of thermal-mechanical forming process with LS-DYAN[A].9th LS-DYNA Forum[C].Bamberg ,2010.
［14］Tian Xiaowe,Zhang Yisheng，Wang Zheng，et al.Design of a tribo-simulator for the high strength steel friction and wear investigation in hot stamping[J].Advanced Materials Research，2011,(421)：147-150.
［15］Tian Xiaowei，Zhang Yisheng，Li Jian.Investigation on tribological behavior of advanced high strength steels：influence of hot stamping process parameters[J].Tribology Letters，2012，45(3)：489-495.
［16］Tobias Olsson.An LS-DYAN mateial model for simulation of hot stamping processes of ultra high strength steels[A].7th European LS-DYNA Conference[C]. Salzburg (Austria) and Bad Reichenhall (Germany)，2009.
［17］Shspiro B. Using LS-DYAN for hot stamping[A]. 7th European LS-DYNA Conference[C]. Salzburg (Austria) and Bad Reichenhall (Germany), 2009.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】