Search International and National Patent Collections

1. (WO2012053642) METHOD FOR MANUFACTURING HOT STAMPED BODY HAVING VERTICAL WALL, AND HOT STAMPED BODY HAVING VERTICAL WALL

Pub. No.:    WO/2012/053642    International Application No.:    PCT/JP2011/074320
Publication Date: Apr 26, 2012 International Filing Date: Oct 21, 2011
IPC: C21D 9/46
C22C 38/00
C22C 38/38
C22C 38/58
C21D 1/18
Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION
新日鐵住金株式会社
TOMOKIYO Toshimasa
友清 寿雅
HAYASHI Kunio
林 邦夫
ASO Toshimitsu
麻生 敏光
Inventors: TOMOKIYO Toshimasa
友清 寿雅
HAYASHI Kunio
林 邦夫
ASO Toshimitsu
麻生 敏光
Title: METHOD FOR MANUFACTURING HOT STAMPED BODY HAVING VERTICAL WALL, AND HOT STAMPED BODY HAVING VERTICAL WALL
Abstract:
The present invention provides a method for manufacturing a hot stamped body having a vertical wall, said method comprising: a hot rolling process; a winding process; a cold rolling process; a continuous annealing process; and a hot stamping process. The continuous annealing process comprises: a heating process for heating a cold rolled steel sheet to the temperature range of Ac1°C to less than Ac3°C; a cooling process for cooling the cold rolled steel sheet from a maximum heating temperature to 660°C at a rate of 10°C/s or less; and a maintaining process for maintaining the cold rolled steel sheet in the temperature range of 550°C to 660°C for 1 to 10 minutes.