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Hardening distortions of serial produced crown wheels
Author(s) -
Olofsson A.,
Jonsson S.
Publication year - 2017
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.201700054
Subject(s) - hardening (computing) , tray , materials science , stacking , metallurgy , quenching (fluorescence) , axle , composite material , structural engineering , mechanical engineering , engineering , physics , optics , nuclear magnetic resonance , layer (electronics) , fluorescence
The hardening distortions of serial produced crown wheels are studied with respect to gear runout, inner diameter and back‐face tilt. The data analysed originates from a production data base from ordinary production as well as from directed experiments carried out in production, resulting in a large set of data. Strong influences are found for steel plants, position of material in ingots and stacking levels on hardening trays. It could be concluded that rectangular strands have a detrimental effect on gear runout, which, however, can be strongly decreased by disabling the magnetic stirring during casting. Furthermore, the inner diameter after quenching is influenced by the stacking level on the hardening tray when free‐hardening or when using a segmented central expander during press quenching. This influence is attributed to variations in hardening temperature. When press quenching using a fixed mandrel, the effect of stacking level disappears. Moreover, it is found that the back‐face tilt strongly depends on the position in the ingot as well as on the stacking level on the hardening tray.