PREVENTION METHOD OF DELAYED FRACTURE BY COLD TRIM FOR HOT STAMPED PARTS

摘要

The present invention relates to a method to prevent delayed fracture occurring in a trip part after the cold trim of a hot stamping component. According to an embodiment of the present invention, the method includes a step (a) of forming a forming body by a hot stamping process; a step (b) of cutting a side of the forming body by a trip process; and a step (c) of removing residual stress by applying a current to the trip part of the forming body.