| 摘要 |
Steel object produced by decomposing a liquid metal stream of an alloy with nitrogen to form a metal powder and compacting the powder with optional deformation comprises a chemical composition containing (in weight %) 1.51-2.5 carbon, up to 0.8 silicon, up to 1.5 manganese, 3.5-4.5 chromium, 13.3-15.3 tungsten, 2.0-3.0 molybdenum, 4.5-6.9 vanadium, 10.05-12.0 cobalt, up to 0.52 sulfur, up to 0.2 nitrogen, maximum 100 ppm oxygen, and a balance of iron. The amount of manganese minus sulfur is at least 0.19. The ratio of concentrations of tungsten to molybdenum is 52.-6.5. Preferred Features: The steel has the following composition (in weight %) 1.75-2.38 C, 0.35-0.75 Si, 0.28-0.54 Mn, 3.56-4.25 Cr, 13.90-14.95 W, 2.10-2.89 Mo, 4.65-5.95 V, 10.55-11.64 Co and 0.018-0.195 N. |
