STEEL SHEETS FOR AUTOMOBILES

摘要

The automobile and steel industries are closely bound by the strong links between their supply and demand. The application of high strength sheet originated from social needs. Due to an increase in vehicle accidents with the moforisation. of the 1960's, the U.S. government established the Federal Motor Vehicle Safety Standard (FMVSS) in 1968. The automotive industry began to adopt high strength steels for use in car parts such as bumpers, door reinforcements and brackets. Before the FMVSS, technology activities in automotive steel sheets were mainly focused on the improvement of formability in mild steel. Following the oil crises in the 1 970s, high strength steels that reduced the thickness of steel sheets in both inner panels and outer panels had been developed. In the 1970's the first continuous annealing facility was commercialised in Japan. This technological innovation formed a turning point in the improvement of productivity and quality of automotive steel sheets, which now demonstrated a wide range of strengths and deep drawing qualities.