| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot-rolling method by which the generation of cracks in the edge parts of a material to be rolled when performing the hot rolling of a continuously cast slab of high nickel alloy steel. SOLUTION: This method is a hot-rolling method of the continuously cast slab of high nickel alloy steel containing 25.0-85.0 mass% Ni and lateral reduction is performed from both end sides in the width direction before performing the first rolling in the longitudinal direction of hot rolling. Preferably, the amount of lateral reduction is set in the range where the following conditions are satisfied. When H<250 mm,ΔW≥15×H/250 and when H≥250 mm,ΔW≥15. Where, H is the thickness of the slab (mm) andΔW is the amount of the lateral reduction (mm). The lateral reduction permits use of edger rolls or a sizing press. COPYRIGHT: (C)2005,JPO&NCIPI
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