Development of a Hot Stamping Process Model for a 2,000 MPa Ultra High Strength Steel

这项研究由福特、普罗马特克研究中心（Magna）、滑铁卢大学和圭尔夫大学合作进行，将研究一种新型超高强度钢合金Usibor 2000-AS的热冲压和最终性能。该合金的强度为2000兆帕，相对于目前的1500兆帕强度合金，它在汽车防侵入结构应用中具有吸引力。然而，目前缺乏这种合金的工艺模型和表征数据，这对商业化应用构成了障碍。因此，将开发一个热冲压工艺模型，以支持工艺和产品的设计和优化，该模型将包括表征数据和子模型：(i)在该工艺中使用的大型（100米）辊底炉内的传热、涂层和基材演变；（ii）高温成形（500-850摄氏度）时的本构行为和成形性。开发的工艺模型和数据将通过充分利用材料能力来减轻产品重量，从而使结构部件厚度减少到1.0毫米。由于高达40%的车身结构件预计将采用热冲压工艺，该项目改进的仿真模型和工艺效率将有助于维持并有可能增加福特和麦格纳在庞大的汽车结构市场中的市场份额。该项目产生的竞争性技术优势将确保加拿大的制造业就业机会，并培养高素质的学生，建立未来的创新能力。更轻、更安全、更省油的汽车将在加拿大制造，并在世界各地行驶。

This research, to be undertaken as a collaboration between Ford, Promatek Research Centre (Magna) and the Universities of Waterloo and Guelph, will address the hot stamping and final properties of a new ultra high strength steel alloy, Usibor 2000-AS. This alloy has a strength of 2,000 MPa making it attractive for automotive anti-intrusion structural applications relative to current 1,500 MPa strength alloys. However, the current lack of process models and characterization data for this alloy represents a barrier to commercial adoption. Thus, a hot stamping process model will be developed to support process and product design and optimization that will include characterization data and sub-models of: (i) heat transfer, coating and substrate evolution within the large-scale (100 m) roller hearth furnaces used in this process; and (ii) constitutive behaviour and formability during high temperature forming (500-850 Celsius). The developed process models and data will enable product weight reduction by fully utilizing the material capabilities, resulting in structural part thickness reductions to 1.0 mm. With up to 40% of car body structural parts projected to be hot stamped, the improved simulation models and process efficiencies from this project will contribute to sustain and potentially increase Ford and Magna's market share in the very large automotive structural market. Competitive technological advantage stemming from this project will secure manufacturing jobs in Canada and the highly qualified students to be trained will establish future innovation capacity. Lighter, safer, more fuel efficient vehicles will be built in Canada and driven around the world.