| 摘要 |
The present invention provides a maraging steel containing: 0.10@C@0.30 mass %, 6.0@Ni@9.4 mass %, 11.0@Co@20.0 mass %, 1.0@Mo@6.0 mass %, 2.0@Cr@6.0 mass %, 0.5@Al@1.3 mass %, and Ti@0.1 mass %, with the balance being Fe and unavoidable impurities, and satisfying 1.00@A@1.08, in which A is 0.95+0.35�[C]-0.0092�[Ni]+0.011�[Co]-0.02�[Cr]-0.001�[Mo], where [C] indicates a content (mass %) of C, [Ni] indicates a content (mass %) of Ni, [Co] indicates a content (mass %) of Co, [Cr] indicates a content (mass%) of Cr, and [Mo] indicates a content (mass%) of Mo, respectively, The maraging steel has a tensile strength of 2,300 MPa or more and is also excellent in the toughness/ductility and fatigue characteristics. |
