| 摘要 |
A method of manufacturing a hardened steel component by heating an air hardenable steel to above 1100‹C, hot forming the steel at a temperature above A1, cooling to approximately 280‹C, and simultaneously thermomechanically processing to size the component, quenching in air to room temperature to form martensite and tempered at approximately 150-250‹C. Optionally the component may be hard worked after tempering. The method may be applied to a steel having the following composition 0.5-0.9 wt % C, 0-1.0 wt % Mn, 0-2.0 wt % Si, 0-2.0 wt % Ni, 0-0.7 wt % Mo, 0-2.0 wt % Cr and 0-0.3 wt % V with the balance being iron and impurities. Components manufactured in this way may include bearing rings and gear components.
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