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Mold powder for continuous casting of A1-containing sub-peritectic steel and continuous casting method

TSUZUMI KENJI / MASAKI HIDEYA

A mold powder which prevents surface defects from occurring on a surface of a cast slab of 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 includes CaO, SiO2, Na2O, Li2O, F, and C. Li2O/Na2O is 0.6 or more, 1.0+0.05×Al≤CaO/SiO2≤2.0−0.35×Al, 10<20, and 1.00≤F/(Li2O+0.5×Na2O+1.46)≤1.24 are satisfied where Al is content by mass % of molten steel, and respective contents of the remaining elements are by mass %. 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.

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Mold powder for continuous casting of A1-containing sub-peritectic steel and continuous casting method

TSUZUMI KENJI / MASAKI HIDEYA

A mold powder which prevents surface defects from occurring on a surface of a cast slab of 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 includes CaO, SiO2, Na2O, Li2O, F, and C. Li2O/Na2O is 0.6 or more, 1.0+0.05×Al≤CaO/SiO2≤2.0−0.35×Al, 10<20, and 1.00≤F/(Li2O+0.5×Na2O+1.46)≤1.24 are satisfied where Al is content by mass % of molten steel, and respective contents of the remaining elements are by mass %. 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.

Mold powder for continuous casting of A1-containing sub-peritectic steel and continuous casting method

TSUZUMI KENJI / MASAKI HIDEYA

A mold powder which prevents surface defects from occurring on a surface of a cast slab of 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 includes CaO, SiO2, Na2O, Li2O, F, and C. Li2O/Na2O is 0.6 or more, 1.0+0.05×Al≤CaO/SiO2≤2.0−0.35×Al, 10<20, and 1.00≤F/(Li2O+0.5×Na2O+1.46)≤1.24 are satisfied where Al is content by mass % of molten steel, and respective contents of the remaining elements are by mass %. 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.

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Titel:

Mold powder for continuous casting of A1-containing sub-peritectic steel and continuous casting method

Beteiligte:

TSUZUMI KENJI (Autor:in) / MASAKI HIDEYA (Autor:in)

Erscheinungsdatum:

02.04.2024

Medientyp:

Patent

Format:

Elektronische Ressource

Sprache:

Englisch

Klassifikation:

IPC: B22D CASTING OF METALS , Gießen von Metallen / C04B Kalk , LIME / C22C Legierungen , ALLOYS

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