| 摘要 |
The invention deals with a corrosion resistant steel of at least 758 MPa comprising in weight %: 0.005 ≤ C < 0.03, 14 ≤ Cr ≤ 17, 2.3 ≤ Mo ≤ 3.5, 3.2 ≤ Ni ≤ 4.5, Si ≤ 0.6, 0.5 ≤ Cu ≤ 1.5, 0.4 ≤ Mn ≤ 1.3, 0.35 ≤ V ≤ 0.6, 3.2 x C ≤ Nb ≤ 0.1, W ≤ 1.5, 0.5 ≤ Co ≤ 1.5, 0.02 ≤ N ≤ 0.05, Ti ≤ 0.05, P ≤ 0.03, S ≤ 0.005, Al ≤ 0.05, the balance of the chemical composition of said corrosion resistant steel being constituted by Fe and inevitable impurities. The invention deals also with the manufacturing method of such steel to obtain a quenched and tempered semi finished product. |
