根据本钢1700mm热连轧机组生产热轧产品的组织和性能特点,通过制定合理的化学成分和轧制工艺在C- Mn基础上加入微合金元素Nb,连轧采用控轧控冷工艺轧制,开发出系列汽车大梁扳,产品的力学性能和加工性能均满足相关标准和用户的使用要求,经济效益和社会效益显著。 According to the microstructure and properties of hot rolled products produced by 1700mm hot rolling mill in Benxi Iron and Steel Co., Ltd., a microalloying element Nb is added on the basis of C-Mn through reasonable chemical composition and rolling process. The continuous rolling is controlled by controlled rolling and controlled cooling , Developed a series of car beam pull, the mechanical properties and processing performance of the products meet the relevant standards and user requirements, significant economic and social benefits.