Patent ID: 11945028
Assignee: JFE STEEL CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 0:
1. A mold powder for continuous casting of Al-containing hypo-peritectic steel, the Al-containing hypo-peritectic steel having Al: 0.2% to 2.0%, by mass %, and, in a hypo-peritectic region, C: 0.08% to 0.17%, by mass %, the mold powder comprising, by mass %:
CaO;
SiO2;
Na2O: 8% or less;
Li2O: 2% to 7%;
F; and
C: 2% to 10%,
wherein Li2O/Na2O is 0.6 or more, where respective contents are by mass %,
inequalities (1), (2), and (3) are satisfied:

1.01≤CaO/SiO2≤1.93  (1)

10<Li2O+0.5×Na2O+0.8×F<20  (2)

1.00≤F/(Li2O+0.5×Na2O+1.46)≤1.24  (3)

CaO, SiO2, Li2O, Na2O, and F are respective contents of the elements by mass % in the mold powder
a viscosity of the mold powder at 1,300° C. is in a range of 0.05 Pa·s to 0.20 Pa·s, and
a crystallization temperature of the mold powder is in a range of 1,100° C. to 1,250° C.