论文部分内容阅读
概述了JFE开发并商业化生产成形性和焊接性均优良的780~1470MPa超高强度系列冷轧钢板。该系列钢板可实现汽车减重,提高碰撞安全性能。该系列钢板是JFE采用自主开发的WQ-CAL(水淬-连续退火生产线)工艺生产的,采用该工艺可以大幅降低钢中合金元素的添加量。其中新开发的1180MPa级抗拉强度钢板的伸长率得到大幅提高,是传统相同级别钢板的1.5倍,与980MPa级钢相同,且其拉伸凸缘性也与980MPa级钢相当。另外,1180MPa级钢的加工淬透性和烘烤硬化性也十分优良,完全可以替代热冲压部件。新开发系列钢可用于白车身结构件,如中梁(加强件)、保险杠、座椅结构架、座椅横挡及座椅部件(如机械锁扣)等多种用途。
An overview of JFE development and commercial production of formability and weldability are excellent 780 ~ 1470MPa ultra-high strength series of cold-rolled steel. This series of steel plate can achieve weight loss and improve crash safety performance. This series of plates is produced by JFE using a self-developed WQ-CAL (Water Quenching - Continuous Annealing Line) process that significantly reduces the amount of alloying elements in the steel. Among them, the newly developed 1180MPa grade tensile strength steel plate has been greatly improved in elongation, which is 1.5 times that of the conventional steel plate of the same grade and 980MPa grade steel, and its stretch flangeability is also comparable to 980MPa grade steel. In addition, 1180MPa grade steel hardenability and bake hardenability is also very good, completely replace hot stamping parts. The newly developed series of steels can be used for a wide range of applications such as mid-beam (stiffeners), bumpers, seat frame, seat rails and seat components such as mechanical locks.