| 摘要 |
<p>A nitriding grade alloy steel includes aluminum in a range of 0.07% to 0.30% by weight and vanadium in a range of 0.03% to 0.20% by weight. Prior art nitriding grade alloy steel generally have relied on molybdenum, nickel and other expensive alloy additions to provide nitridability and core hardness. The present invention includes only essential amounts of carbon, manganese, and chromium, in addition to small, controlled amounts of aluminum and vanadium. The present invention is not only economical to produce due to the absence of significant amounts of costly alloying elements, but also has a unique combination of hardenability, resistance to loss of hardness during tempering, and excellent nitride response. Articles manufactured from the new alloy steel are desirably hardened, tempered, machined and nitrided, and are useful in applications requiring high wear resistance and high stress loading. Such articles include gears, shafts, bushings, couplings and other such articles subjected to severe service applications.</p> |
