公开(公告)号：EP1100638A4

公开(公告)日：2001-10-17

申请号：EP99938060

申请日：1999-08-06

申请人： ISHIKAWAJIMA HARIMA BR JUKOGYO ,  BHP STEEL JLA PTY LTD

发明人： STREZOV LAZAR ,  MUKUNTHAN KANNAPPAR

IPC分类号： B22D11/00 ,  B22D11/06 ,  C23C18/31 ,  C25D7/00

CPC分类号： B22D11/0668 ,  B22D11/0651

摘要： In twin roll casting of steel strip, molten steel is introduced into the nip between parallel casting rolls (16) to create casting pool (30) supported on casting surfaces (16A) of the rolls and the rolls are rotated to deliver solidified strip (20) downwardly from the nip. Casting surfaces (16A) are textured by a random pattern of discrete projections having pointed peaks with a surface distribution of between 10 and 100 peaks per mm and an average height of at least 10 microns. The random texture may be produced by grit blasting the casting surfaces on a substrate covered by a protective coating. Alternatively the texture may be produced by chemical deposition or electrodeposition of a coating onto a substrate to form the casting surfaces.