公开(公告)号：EP0742841B1

公开(公告)日：2001-08-22

申请号：EP95942980.4

申请日：1995-12-01

Applicant: ExxonMobil Research and Engineering Company

Inventor： KOO, Jayoung ,  Luton, Michael John

IPC: C21D8/02 ,  C21D6/02 ,  C22C38/12

CPC classification number: C21D6/02 ,  C21D7/12 ,  C21D8/0226 ,  C21D8/10 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: A high strength steel composition comprising ferrite and martensite/bainite phases, the ferrite phase having primarily vanadium and niobium carbide or carbonitride precipitates, is prepared by a first rolling above the austenite recrystallization temperature, a second rolling below the austenite recrystallization temperature; cooling between the Ar3 transformation point and 500 DEG C; and water cooling to below about 400 DEG C.