EP 0539962 A1 19930505 - Method of manufacturing a cold rolled steel sheet exhibiting an excellent resistance to cold-work embrittlement and a small planar anisotropy.
Title (en)
Method of manufacturing a cold rolled steel sheet exhibiting an excellent resistance to cold-work embrittlement and a small planar anisotropy.
Title (de)
Verfahren zum Herstellen von kaltgewalzsten Stahlblechern mit hoher Beständigkeit gegen Versprödung durch Kaltbearbeitung und mit niedriger ebener Anisotropie.
Title (fr)
Procédé de fabrication de tÔles d'acier laminées à froid ayant une résistance à la fragilité suite au travail à froid ainsi qu'une anisotropie plane réduite.
Publication
Application
Priority
JP 28297891 A 19911029
Abstract (en)
A method of manufacturing a cold rolled steel sheet includes the steps of preparing, as a material, a steel whose composition consists of C : 0.004 wt% or less, Si : 0.10 wt% or less, Mn : 0.50 wt% or less, Ti : between 0.01 wt% and 0.10 wt%, Nb : between 0.003 wt% and 0.03 wt%, B : between 0.001 wt% and 0.004 wt%, Al : between 0.03 wt% and 0.10 wt%, P : 0.025 wt% or less, S :0.01 wt% or less, N : 0.006 wt% or less; performing a hot rolling on the material steel under the conditions of a finishing temperature between 800 DEG C and 900 DEG C; coiling the material at a temperature lower than 650 DEG C; performing a cold rolling; performing a continuous annealing at a temperature between 830 DEG C and Ac<7> transformation point; and performing a skin pass rolling. <IMAGE>
IPC 1-7
IPC 8 full level
C21D 8/04 (2006.01); C21D 9/48 (2006.01); C22C 38/00 (2006.01); C22C 38/14 (2006.01)
CPC (source: EP)
C21D 8/0426 (2013.01); C21D 8/0473 (2013.01)
Citation (search report)
- [X] EP 0421087 A2 19910410 - KOBE STEEL LTD [JP]
- [X] EP 0108268 B1 19870311
- [A] EP 0295697 A2 19881221 - KAWASAKI STEEL CO [JP]
- [A] EP 0203809 A2 19861203 - KAWASAKI STEEL CO [JP]
- [AD] PATENT ABSTRACTS OF JAPAN vol. 13, no. 479 (C-648)18 October 1989 & JP-A-11 88 630 ( NIPPON STEEL CORPORATION ) 27 July 1989
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0539962 A1 19930505; EP 0539962 B1 19980429; CA 2081496 A1 19930430; CA 2081496 C 19970513; DE 69225294 D1 19980604; DE 69225294 T2 19980820; JP 2781297 B2 19980730; JP H05117758 A 19930514; KR 950013192 B1 19951025
DOCDB simple family (application)
EP 92118452 A 19921028; CA 2081496 A 19921027; DE 69225294 T 19921028; JP 28297891 A 19911029; KR 920019868 A 19921028