|About this Abstract
||Materials Science & Technology 2011
||Processing, Microstructure and Properties of Cast Irons and Cast and Forged Specialty Steels
||Optimization of Molybdenum Alloyed Carburizing Steels by Nb Microalloying for Large Gear Applications
||Hardy Mohrbacher, Frank Hippenstiel
|On-Site Speaker (Planned)
A steel type frequently used for large gear in heavy vehicle and industrial applications are molybdenum alloyed carburizing steels being particularly suited for direct hardening. The paper will demonstrate how the manufacturing and application properties of such steels can be enhanced by microalloying. A key aspect in this respect is the precipitation of Nb-containing special carbides during the heat treatment cycle of such steel. The metallurgical aspects of alloy composition and its corresponding effect during thermo-mechanical treatment will be discussed. Furthermore, results indicating benefits with regard to thermal distortion and load-bearing capacity of gear parts will be presented. Finally it will be outlined how this experience can be utilized for increasing the performance of large gear in wind power applications.
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