公开(公告)号：EP0706845A4

公开(公告)日：1997-05-02

申请号：EP95913335

申请日：1995-03-24

申请人： NIPPON STEEL CORP

发明人： NAKASHIMA HIROYUKI ,  OKA HIDEKI ,  TAKEUCHI HIDEMARO ,  TANAKA SHIGENORI ,  FUKUDA YOSHIMORI ,  AKAMATSU SATOSHI ,  MIYAZAKI MASAFUMI ,  MATSUMURA YOSHIKAZU

IPC分类号： B22D11/06 ,  B22D11/12

CPC分类号： B22D11/0622 ,  B22D11/0697 ,  B22D11/1213

摘要： In continuous casting of a carbon steel thin strip slab, the present invention makes the scales generated in the slab thin and produces a composition suitable for machining such as cold rolling and pressing. The construction of an apparatus for restricting the occurrence of the scales is simplified, a consumption quantity of an inert gas is saved, and the slab is produced efficiently. A carbon steel containing not greater than 0.5 % of C is cooled and solidified by a pair of cooling drums to produce a thin strip slab having a thickness of not greater than 10 mm, the slab so produced is introduced into a sealed chamber and is held in an argon atmosphere having an oxygen gas concentration of not higher than 5 % within a temperature range of up to at least 1200 DEG C, the temperature range is then cooled to 750 to 800 DEG C at a cooling rate of at least 10 DEG C/sec, and the slab is taken up by a winding machine into a coil within a temperature range of 500 to 800 DEG C. The atmosphere described above is generated by utilizing a nitrogen gas or a combustion waste gas, the formation of the scales is restricted, and the composition is controlled.

公开(公告)号：EP0575617A4

公开(公告)日：1996-10-16

申请号：EP92906689

申请日：1992-03-16

申请人： NIPPON STEEL CORP ,  MITSUBISHI HEAVY IND LTD

发明人： FUKUDA YOSHIMORI ,  SHIMOMURA KENSUKE ,  ARAI TAKASHI

IPC分类号： B22D11/06

CPC分类号： B22D11/066