Title:
MOLD FLUX FOR CONTINUOUSLY CASTING STEEL
Document Type and Number:
Japanese Patent JP3256147
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a mold flux for obtaining a non-defect cast slab excellent in a surface characteristics, in a continuous casting of a medium carbon steel, SUS420 and SUS304.
SOLUTION: In a vertical cross section of a sample obtd. with a specific mold flux melt-testing method, a crystal grain diameter in the sample cross section is 0.1-9.0mm and a ratio of this grain diameter to the whole sample cross section is made to ≥70%. Further, in order to obtain this sample cross sectional condition, a metal or compound powder having fining action of a crystal grain is suitably blended. By this constitution, a crystallizing ratio when a mold powder flowed into a gap between the mold and a cast slab solidifies, is made to high and slow cooling in a mold and lowering of the variation of local heat flow flux can be realized and a high quality steel can stably and continuously be cast.
Inventors:
Akira Matsuo
Toshio Matsuyama
Toshio Matsuyama
Application Number:
JP23578596A
Publication Date:
February 12, 2002
Filing Date:
August 20, 1996
Export Citation:
Assignee:
Nippon Steel Construction Materials Co., Ltd.
International Classes:
B22D11/07; B22D1/00; B22D7/10; B22D11/10; B22D11/108; B22D11/111; G01N33/20; (IPC1-7): B22D11/108; B22D11/07
Domestic Patent References:
| JP7185755A | ||||
| JP60127054A | ||||
| JP55148715A | ||||
| JP4258353A | ||||
| JP5277680A | ||||
| JP1058103A | ||||
| JP8267204A | ||||
| JP7164120A | ||||
| JP7204810A | ||||
| JP63214653A |
Attorney, Agent or Firm:
Yasuhiro Hagiwara