Verfahren zur Beurteilung von Verzögertem Bruch, Verfahren zur Vorhersage von Verzögertem Bruch, Verfahren zur Herstellung eines Pressgeformten Artikels und Programm

Details

Veröffentlichungs-Nr.

EP4772853

Anmeldetag

23. April 2024

Veröffentlichung

27. März 2025

Rechtsraum

EP

IPC

G01N3/08, G01N3/20, G01N17/00

Abstract

There are provided a method capable of evaluating delayed fracture in a sheared end surface with higher accuracy and a method for manufacturing a press-formed article using the method. A method for evaluating delayed fracture for evaluating the delayed fracture characteristics of a sheared end surface of a metal sheet including: testing whether the delayed fracture occurs with respect to application of forming strain and load stress to the sheared end surface of the metal sheet; for each of two or more evaluation positions along the sheet thickness direction of the sheared end surface, determining evaluation information on whether the delayed fracture occurs with respect to the forming strain and the load stress at the evaluation position based on the test; and determining, from the determined evaluation information, evaluation criteria for the delayed fracture evaluation with the evaluation position, the forming strain, and the load stress as variables.

Anmelder

Firma

JFE Steel Corporation

Land

🇯🇵 Japan