HOT-PRESSING STEEL PLATE, PRESS-MOLDED ARTICLE, AND METHOD FOR MANUFACTURING PRESS-MOLDED ARTICLE

摘要

Provided is a hot-pressing steel plate having a prescribed chemical composition, in which Ti-containing deposits included in the steel plate and having an equivalent circular diameter of 30 nm or less have an average equivalent circular diameter of 3 nm or greater, and in which molding and processing prior to hot-pressing are facilitated by having the amount of deposited Ti and the total amount of Ti in the steel satisfy a prescribed relation, and a metal structure have a ferrite content of 30% by area or greater. Said steel plate is useful for obtaining a hot-pressed molded article such that, when uniform characteristics within the press-molded article are required, a high level of balance between high strength and stretchability can be achieved; or, when regions corresponding to shock-resistant sites and energy-absorbing sites are required in one press-molded article, a high level of balance between high strength and stretchability is achieved in accordance with the respective regions.