Ni-based alloy, Ni-based alloy ingot, slab for Ni-based alloy hot rolling and Ni-based alloy sheet

摘要

The object of the present invention is to heat even a high Nb-containing Ni-based alloy which is excellent in hot workability, cracking resistance and corrosion resistance and which contains 1.5 mass% or more of Nb in the Ni-based alloy. It is possible to provide a Ni-based alloy excellent in scale removability, which can prevent the generation of dents and wrinkles on the surface of the alloy due to the pressing of the oxide scale generated in the in-process step, and obtain excellent yield before and after hot working. To aim. 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) Aluminum: 3 to 25% Aluminum (Al): 0.01 to 0.20% Titanium (Ti): 0.001 to 0.20% Nitrogen (N): 0.003 to 0.020% Boron B): 0.0010 to 0.0100%, oxygen (O): 0.0002 to 0.0020%, molybdenum (Mo) and / or tungsten (W): 0.005 to 0.25%, balance nickel ( Ni) and unavoidable impurities, and in the following formulas (wherein each element is described in Ni-based alloy A Ni-based alloy excellent in scale removability characterized by satisfying the relationship of the content (mass%) of the element. 4.2 × Mo + 3.6 × W + 355 × B ≧ 0.60 【Selection chart】 None