Title:
CONTINUOUS CASTING METHOD OF STEEL
Document Type and Number:
Japanese Patent JP3158233
Kind Code:
B2
Abstract:
PURPOSE: To provide a method for securely producing a defectless slab at the time of subjecting a medium carbon steel to continuous casting.
CONSTITUTION: This is a method for preventing depression and longitudinal cracks in a continuously cast slab in which components are regulated so as to satisfy the following conditions and subjected to casting at the time of subjecting a carbon steel and an alloy steel to melting and casting : A=-2.5[% C]-0.05-[%Mn]-0.1[%Ni]+-0.1[C]+0.25[%Si]+-[%Mo]+1.75[%S]+-1.25, and A ≤0.95 or A ≥1.05 is satisfied. Moreover, as for the basicity B of powder, in the case of A<0.90 or A>1.10, B is regulated to 0.8 to 1.4 and, in the case of 0.90≤A≤0.95 or 1.05 ≤A≤1.10, B is regulated to 1.1 to 1.4. Thus, cracks and depression in a medium carbon steel can be prevented.
Inventors:
Eisho Anzai
Mitsuru Nikaido
Kei Hirabayashi
Masashi Yoshida
Takeyuki Sekiya
Mitsuru Nikaido
Kei Hirabayashi
Masashi Yoshida
Takeyuki Sekiya
Application Number:
JP7024994A
Publication Date:
April 23, 2001
Filing Date:
March 16, 1994
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
B22D11/00; B22D11/10; B22D11/108; B22D11/111; C22C38/00; C22C38/44; (IPC1-7): B22D11/00; C22C38/00
Attorney, Agent or Firm:
Masamitsu Akizawa (1 person outside)
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