| 摘要 |
PROBLEM TO BE SOLVED: To provide a cutter composed of a Ni-Cr alloy produced with an superior workability and by a significantly simplified process, having a low deterioration in hardness even when heated in use, having excellent corrosion resistance and low-temperature embrittlement resistance, and satisfactorily maintaining the cutting performance for a long time. SOLUTION: In the method of manufacturing a cutter composed of an Ni-Cr alloy containing from 32 to 44 mass% of Cr, from 2.3 to 6 mass% of Al, the balance being Ni, impurities, and additional trace elements and having a Rockwell C hardness of 52 or more, the Ni-Cr alloy further includes: 0.1 mass% or less of C; 0.05 mass% or less of Mn; 0.005 mass% or less of P; 0.005 mass% or less of O; 0.003 mass% or less of S; 0.02 mass% or less of Cu; and 0.05 mass% or less of Si; as the impurities and the additional trace elements. The total content of P, O, and S is 0.01 mass% or less and the total content of Mn, Cu, and Si is 0.05 mass% or less. COPYRIGHT: (C)2009,JPO&INPIT
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