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Systematische Untersuchung von verzugsbeeinflussenden Parametern beim Einsatzhärten von Stirnrädern
Author(s) -
Steinbacher M.,
Surm H.,
Clausen B.,
Lübben Th.,
Hoffmann F.
Publication year - 2012
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201100894
Subject(s) - case hardening , quenching (fluorescence) , hardening (computing) , distortion (music) , spur , materials science , heat transfer , mechanical engineering , metallurgy , composite material , mechanics , structural engineering , engineering , hardness , optics , physics , layer (electronics) , fluorescence , amplifier , optoelectronics , cmos
Highly stressed gears are typically heat treated to satisfy operational demands. Case hardening is a common heat treatment associated with power train components. In the heat treatment process complex distortion processes take place, which were studied in these examinations. Object of the actual investigations were spur wheels with module 2.557 and 42 teeth on the wheel with a helix angel of 23°. The case hardening was realized utilizing low pressure carburisation with subsequent high pressure gas quenching in a heat treatment furnace of industrial proportion. The systematic analysis was guided using design of experiment methods. In strategic focus were the three contributing heat treatment steps of heating, carburisation and quenching. Heating related factors were the batch design, the heat transfer and the preheating temperature. During carburisation the temperature, carburisation depth and surface carbon content as well as the atmosphere during diffusion were altered. Finally the quenching related variation was the hardening temperature. The identified main factors on size as well as shape changes of the base body and the toothing will be presented and discussed.