Title:
METHOD FOR CONTINUOUSLY CASTING STEEL
Document Type and Number:
Japanese Patent JP3488656
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce the occurrence of center segregation to a level having practically no problem, even in the case of generating the change of casting speed.
SOLUTION: In a continuous casting method for executing rolling reduction to a cast slab in the continuous casting process, in 0.3-0.7 mm/m of rolling reduction gradient, the rolling reduction is executed so that the rolling reduction gradient X (mm/m) and the solidified shell thickness Y (mm) satisfy the equation Y=50X+45, within range from a position where the solidified shell thickness becomes ≥70 mm before the center solid phase ratio at the thickness center part of the cast slab at the casting time in the permissible min. casting speed reaches 0.3, to a position where the center part of the cast slab at the casting time in the permissible max. casting speed reaches a fluid limit solid phase ratio.
Inventors:
Masahiko Kokita
Nakata et al.
Nakata et al.
Application Number:
JP10060499A
Publication Date:
January 19, 2004
Filing Date:
April 07, 1999
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
B22D11/128; B22D11/20; (IPC1-7): B22D11/128; B22D11/20
Domestic Patent References:
| JP1177269A | ||||
| JP6262320A | ||||
| JP5220558A | ||||
| JP4309446A | ||||
| JP9285856A |
Attorney, Agent or Firm:
Etsushi Kotani (1 person outside)
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