| 摘要 |
PROBLEM TO BE SOLVED: To provide a continuous casting mold capable of preventing surface crack of a solidified shell caused by uneven cooling of the solidified shell in the initial solidification stage and uneven thickness generated in transformation from δ-iron to γ-iron of medium carbon steel accompanying a peritectic reaction.SOLUTION: A continuous casting mold 1 includes a plurality of low heat conduction ceramics filling parts 3, each having a diameter of 2-10 mm and formed independently from each other by filling the inner part of a circular recessed groove 2 with ceramics having 20% or less heat conductivity with respect to copper, within a region on the inner wall surface from an optional position above a meniscus to a position below the meniscus by a distance Lor more satisfying Expression (1) below. Expression (1) is represented by L=2×Vc×1000/60, provided that Lis a distance (mm) from the meniscus and Vc is a cast piece pull out speed (m/min) at the steady casting time. |
