| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide mold powder for continuous casting which can suppress surface cracks generated on a cast slab, without controlling surface temperature of the cast slab, and a continuous casting method. <P>SOLUTION: The mold powder for continuous casting is added on a surface of molten steel at the time of continuous casting of steel. This mold powder for continuous casting includes SiO<SB POS="POST">2</SB>, Li<SB POS="POST">2</SB>O, Al<SB POS="POST">2</SB>O<SB POS="POST">3</SB>, CaO, and F as main components. The SiO<SB POS="POST">2</SB>content is 5.0 mass% or more to 20.0 mass% or less in concentration. The Li<SB POS="POST">2</SB>O content is 0.5 mass% or more to 5.0 mass% or less in concentration. The Al<SB POS="POST">2</SB>O<SB POS="POST">3</SB>content is 15.0 mass% or more to 30.0 mass% or less in concentration. Further, when it is defined that CaO (mass% in concentration) + F (mass% in concentration) ×(56/38) is T.CaO, a conditional expression of T.CaO/SiO<SB POS="POST">2</SB>≥2.0 is satisfied. <P>COPYRIGHT: (C)2012,JPO&INPIT |
