| 摘要 |
<p>Provided are a heat-resistant steel product excellent in the heat resistance, which is reduced in the variation in the material quality and can exhibit, even at 600°C, a yield strength of not less than 2/3 times that at an ordinary temperature; and a method for producing the heat-resistant steel product. A heat-resistant steel product characterized in that it comprises 0.01 to 0.03 mass % of C, 0.2 to 1.7 mass % of Mn, 0.5 mass % or less of Si, 0.7 to 2 mass % of Cu, 0.8 mass % or less of Mo, 0. 01 to 0.3 mass % of Nb, 0.005 to 0.03 mass % of Ti, 0.006 mass % or less of N, 0.0003 to 0.003 mass % of B, 0.2 mass % or less of V, 1 mass % or less of Cr, 0.1 mass % or less of Al, 0.03 mass % or less of P, 0.02 mass % or less of S, Ni in an amount satisfying a mass ratio of Ni/Cu of 0.6 to 9.0 and the balance of Fe and inevitable impurities, and exhibits a yield strength at 600°C of 60 % or higher of that at 21°C.</p> |
