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

继开发了用于制造压力淬火钢(PHS)和CFRP混杂零件的一步成型、固化和连接新工艺(2017-18年)后，与英国斯旺西大学钢铁与金属研究所合作铸造了新的实验钢化学。实验钢化学包含一种新的添加Si、Al、P、Nb和B的组合，以在新的相变诱导塑性(TRIP)辅助PHS零件制造过程中优化组织演变，其特征是奥氏体在贝氏体铁素体基质中保持不变。至关重要的是，钢铁化学让工业制造商变得孤立无援。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、显微组织和机械性能之间的关系。经过优化，新的TRIP辅助PHS技术与PHS-CFRP混合零件的新一步工艺相结合。该技术允许经济地制造用于安全关键汽车应用的轻量化部件，进而促进更安全、更轻的车辆。结果将在两篇期刊论文和一篇会议论文(目前正在接受同行审查)上发表。

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).