Ni-based alloy and method for manufacturing slab for hot rolling using Ni-based alloy

摘要

PROBLEM TO BE SOLVED: To provide a Ni-base alloy capable of preventing the occurrence of cracks in an early stage of a hot forging process even in a large-angle Ni-base alloy ingot, and a method for producing a slab for hot rolling using the Ni-base alloy. The purpose is to provide. SOLUTION: In mass %, carbon (C): 0.001 to 0.045%, silicon (Si): 0.05 to 1.00%, manganese (Mn): 0.05 to 1.00%, Phosphorus (P): 0.015% or less, sulfur (S): 0.0030% or less, chromium (Cr): 14 to 24%, niobium (Nb): 1.5 to 4.0%, iron (Fe). : 3 to 25%, aluminum (Al): 0.01 to 0.20%, nitrogen (N): 0.003 to 0.020%, boron (B): 0.0010 to 0.0100%, oxygen ( O): 0.0002 to 0.0020%, the balance nickel (Ni) and unavoidable impurities, and the Nb/B value is 500 or more. [Selection diagram] None