USE OF A STEEL FOR PRODUCING A STEEL COMPONENT, NAMELY FOR A GEARWHEEL, A SHAFT, AN AXLE OR A TOOL HOLDER TO A THERMOCHEMICALLY CURED EDGE LAYER AND SUCH STEEL COMPONENT HAVING A THERMOCHEMICALLY CURED EDGE LAYER

摘要

The invention relates to the use of a steel for producing a steel component, namely a gear wheel, a shaft, an axle or a tool holder, with a thermochemically hardened surface layer, the steel component having a structure consisting of at least 80% by volume of bainite in its core area and the steel used consists of (in% by weight) C: 0.1-0.30%, Si: 0-0.80%, Mn: 0.20-2.00%, Cr: 0-4.00 %, Mo: 0.5 - 1.80%, N: 0.004 - 0.020%, S: 0 - 0.40%, AI: 0.004 - 0.020%, B: 0 - 0.0025%, Nb: 0 - 0 , 20%, Ti: 0-0.02%, V: 0-0.40%, Ni: 0-0.5%, Cu: 0-0.3%, Co: 0-1.5%, remainder Iron and unavoidable impurities, the following condition applies to the Al content% Al, the Nb content% Nb, the Ti content% Ti, the V content% V and the N content% N of the steel:% Al / 27 +% Nb / 45 +% Ti / 48 +% V / 25% N / 3.5. The invention also relates to a steel component made in accordance with its use.