Future generation of very high strength steels for automotive applications: expected performance improvement for the vehicles and foreseen manufacturing difficulties

摘要

In order to fulfill the requirement of The European Union on exhaust gas emission reduction, Renault, as each car manufacturers in Europe, is trying to stabilize the weight of its Body-In-White, Since 10 years, massive quantity of high strength (HSS) and very high strength steels (VHSS) has been introduced and, on the other hand, light materials such as aluminum has also been applied on hang-on parts : hoods and doors (fig. 1), For example, on the last launched Modus vehicle, TRIP and hot rolled high strength grades have been specified on side and cross members and also on a B-piliar reinforcement.