Springback behaviour and quenchability in hot stamping of thick sheets

Abstract Springback behaviour and quenchability in hot stamping of thick quenchable steel sheets were investigated. For 2.4 and 3.2 mm in thickness, the holding times for sufficient hardening and the prevention of the springback were 10 and 20 s, respectively, and the time for the thick sheets is considerably longer than that for conventional thicknesses. In addition, hot stamping by water and die quenching was applied to reduce the holding time at the bottom dead centre.