公开(公告)号：EP0078694A3

公开(公告)日：1984-05-16

申请号：EP82305795

申请日：1982-11-01

申请人： Hitachi, Ltd.

发明人： Akahori, Kimihiko ,  Maeno, Shigeo ,  Kodama, Hideyo ,  Morisada, Norio

IPC分类号： C21D07/13 ,  C21D08/00 ,  C21D09/38 ,  C22C38/28 ,  B22D07/00 ,  B21J05/00

CPC分类号： C21D8/005 ,  C21D7/13 ,  C21D9/38 ,  C22C38/26 ,  Y10T29/49988

摘要： A metod of producing forged article by casting a molten alloy steel containing 0.02 to 0.15wt% of niobium and 9 to 12wt% of chromium in a metal mold to form an ingot and subjecting the ingot to a forging. The ingot is formed to have a diameter greater than the height thereby to prevent generation of eutectic NbC and sedimental crystals.