| 摘要 |
PURPOSE:To provide excellent corrosion resistance and to facilitate surface hardening by nitriding, by incorporating specific amounts of V, Ta, Zr, and Hf to Ni metal. CONSTITUTION:One or more kinds among 0.2-20% V, 0.2-20% Ta, 0.1-5.0% Zr, and 0.1-5.0% Hf are incorporated to Ni metal, where, when only one kind is incorporated, the lower limits of V, Ta, Zr, and Hf are regulated to 0.5%, 0.5%, 0.2%, and 0.2%, respectively. Moreover, as the Ni metal, a material consisting of, by weight, <=20% Fe, <=5% Si, <=20% Mn, <=10% Mo, <=20% Cu, <=30% Co, and the balance Ni with inevitable impurities may be employed. If necessary, one or more kinds among 0.1-15% Ti, 0.2-20% Nb, 0.5-12% Cr, and 0.3-15% Al are further incorporated to the above composition. An Ni-metal material with this composition has a property easy to undergo nitriding and is excellent in workability, etc.
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