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

这项研究将由福特、普罗马泰克研究中心(麦格纳)、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的烫印和最终性能。这种合金的强度为2,000兆帕，与目前的1,500兆帕强度合金相比，它对汽车防撞结构应用具有吸引力。然而，目前缺乏这种合金的工艺模型和表征数据，这是商业采用的障碍。因此，将开发一个热冲压工艺模型，以支持工艺和产品设计和优化，其中将包括以下特征数据和子模型：(I)用于该工艺的大型(100米)辊底式炉膛内的热传递、涂层和基材演变；(Ii)高温成形(500-850摄氏度)过程中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性能来减轻产品重量，从而使结构部件厚度减少到1.0 mm。由于预计高达40%的车身结构件将被烫印，该项目改进的模拟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非常大的汽车结构市场的市场份额。该项目产生的具有竞争力的技术优势将确保加拿大制造业的就业机会，接受培训的高素质学生将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.