| 摘要 |
A precipitation-strengthened Ni-based heat-resistant alloy according to the present invention comprises 0.03 wt% or less of C, 0.5 wt% or less of Mn, 0.01 wt% or less of P, 0.01 wt% or less of S, 2.0 to 3.0 wt% of Si, 23 to 30 wt% of Cr, 7.0 to 14.0 wt% of W, 10 to 20 wt% of Fe, and 40 to 60 wt% of Ni, with the total of the C, N, O, P and S contents being 0.01 wt% or less. Moreover, silicide is dispersed and precipitated and the crystal grain diameter of the parent phase austenite is inhibited by heat treatment. As a result, a precipitation-strengthened Ni-based heat-resistant alloy having superior irradiation resistance, heat resistance, and corrosion resistance is obtained at a low cost. |
