Physical and Numerical Simulation of Hot Stamping for Hybrid Steel-Composite Lightweigh t Bodies

在开发了用于制造压硬化钢（PHS）和CFRP混合部件的新的一步集成成型、固化和连接工艺（2017-18）之后，与英国斯旺西大学钢铁与金属研究所合作，铸造了一种新的实验性钢化学。实验钢化学包含Si， Al， P， Nb和B添加的新组合，以优化微观组织演变，其标志是在贝氏体铁素体基体中保留奥氏体，在新的相变诱导塑性（TRIP）辅助PHS零件制造过程中。至关重要的是，钢铁化学使工业制造商无依无靠。开发了新的TRIP辅助PHS技术，包括冲压硬化实验、力学测试和成形零件的微观组织表征，以确定和优化工艺参数、微观组织和力学性能之间的关系。优化后，将新的TRIP辅助小灵通技术与PHS- cfrp混合部件的新一步工艺相结合。该技术允许为安全关键的汽车应用经济地制造轻质部件，从而促进更安全和更轻的车辆。研究结果将发表在两篇期刊论文和一篇会议论文上（目前正在同行评审中）。

Following development a new one-step integrated forming, curing and joining process for manufacturing Press Hardened Steel (PHS) and CFRP hybrid parts (2017-18), a new experimental steel chemistry was cast in collaboration with the Steel & Metals Institute at Swansea University (UK). The experimental steel chemistry contains a novel combination of Si, Al, P, Nb and B additions in order to optimise microstructural evolution, marked by retention of austenite within a bainitic ferrite matrix, during a new Transformation Induced Plasticity (TRIP) assisted PHS part manufacturing process. Crucially, the steel chemistry maintains industrial manufacturer friendless. Development of the new TRIP assisted PHS technology was developed, involving press hardening experiments, mechanical testing and microstructural characterisation of formed parts in order to determine and optimise the relationship between process parameters, microstructure and mechanical properties. Following optimisation, the new TRIP assisted PHS technology was combined with the new one-step process for PHS-CFRP hybrid parts. The technology permits economical manufacturing of lightweight parts for safety-critical automotive applications, in turn promoting safer and lighter vehicles. The results are to be published over two journal papers and one conference paper (currently under peer-review).