| 摘要 |
PROBLEM TO BE SOLVED: To obtain a good quality cast slab having no fine crack on the surface by slowing down cooling speed of solidified shell, leavingδ-ferrite phase on the surface layer part of the cast slab and reducing the segregation of P and S. SOLUTION: In a continuous caster synchronously shifting a mold surface with the thin cast slab, a mold forming a metallic oxide layer on the outermost surface thereof contacting with molten Ni-Cr base stainless steel, is used. The casting is executed under the condition satisfying <=1.2 of an Ni balance value in the molten steel defined with the following equation. Ni balance = Ni + 0.5Mn + 30(C+N) -1.1(Cr+1.5Si+Mo) + 8.2, wherein, all figures are based on wt%.
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