| 摘要 |
This Ni-Cr alloy material has a chemical composition comprising 0.01-0.5% of Si, 0.01 to less than 1.0% of Mn, 0.01 to less than 1.0% of Cu, 48 to less than 55% of Ni, 22-28% of Cr, 5.6 to less than 7.0% of Mo, 0.04-0.16% of N, 0.03-0.20% of sol.Al, 0.01-0.074% of REM, at least 0% and less than 8.0% of W, 0-2.0% of Co, a total of 0.0003-0.01% of at least one of Ca and Mg, a total of 0-0.5% of at least one of Ti, Nb, Zr, and V, and the remainder being Fe and unavoidable impurities, among the impurities, C = 0.03%, P = 0.03%, S = 0.001%, and O = 0.01%, and the dislocation density (?) in units of m-2 satisfies the formula 7.0×1015 = ? = 2.7×1016-2.67×1017×REM. The Ni-Cr alloy material has superior toughness and hot workability, and also has superior corrosion resistance in environments containing H2S and high temperatures exceeding 200°C. |
