Development of high strength hot-rolled steel products for automotive applications

钢铁和汽车行业是减少温室气体排放和保护环境的关键参与者。开发先进的高强度钢是减轻车辆重量和提高燃料效率的最有前途的方法之一。 随着钢铁生产商努力生产这些新等级的钢材，他们面临着与轧机能力、质量和环境控制、客户需求和成本竞争力相关的挑战。 正是在这一复杂的环境中，与ArcelorMittalDofasco联合开展的这项研究将专注于开发、加工和表征用于汽车车身底部应用（底盘和轮架）的先进高强度钢。最终产品的规格相当严格，因为它们需要高强度、高韧性和良好的成形性，同时可焊接。为了满足这些要求，需要同时优化钢的化学和加工条件，并考虑轧机的具体轧制和冷却能力。该项目的目标是生产HR980钢，这是一种热轧级钢，抗拉强度为980 MPa。 将使用基于物理的建模来设计钢化学和热机械加工计划。 这些钢将在安赛乐米塔尔位于法国的工厂进行铸造和热轧。 将评估新钢的显微组织和机械性能，以达到生产HR980钢的最佳化学和加工路线。该赠款将在对加拿大经济非常重要的领域培训一名博士后研究员，一名硕士生和一名研究助理。

The steelmaking and the automotive industries are key players in the drive to reduce greenhouse emissions and protect the environment. The development of advanced high strength steels is one of the most promising approaches for reducing vehicle weight and improving fuel efficiency. As steel producers strive to produce these new grades of steels, they are faced with challenges related to mill capability, quality and environmental control, customer needs and cost competitiveness. It is within this complex landscape that this study, undertaken jointly with ArcelorMittalDofasco, will focus on the development, processing and characterization of an Advanced High Strength Steel for underbody automotive application (chassis and wheel frame). The specifications for the final product are quite severe as they require high strength, high toughness and good formability, while being weldable. To meet these requirements, the chemistry and processing conditions of the steel need to be optimized simultaneously and taking into account the specific rolling and cooling capacity of the mill.****The goal of this project is to produce HR980 steel, which is a hot-rolled grade of steel with a tensile strength of 980 MPa. Physically-based modelling will be used to design the steel chemistry and thermomechanical processing schedule. The steels will be cast and hot-rolled at ArcelorMittal's facilities in France. The microstructure and mechanical properties of the new steel will be evaluated in order to arrive at the optimum chemistry and processing route to produce HR980 steel. The grant will train one Post-Doctoral Fellow, one Master's student and one Research Associate in an area of great importance to the Canadian economy.**