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Effects of tramp elements Cu, P, Pb, Sb and Sn on the kinetics of carburization of case hardening steels
Author(s) -
Ruck Andreas,
Monceau Daniel,
Grabke Hans Jürgen
Publication year - 1996
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199605484
Subject(s) - case hardening , hardening (computing) , tramp , kinetics , chemistry , metallurgy , materials science , nuclear chemistry , layer (electronics) , physics , hardness , biochemistry , transgene , quantum mechanics , gene , organic chemistry
Investigations on the effect of tramp elements and impurities on the gas carburization of case hardening steels in CO‐H 2 ‐H 2 O gas mixtures at 930°C in a flow apparatus by thermogravimetric experiments were carried out. The influence of surface segregation on the kinetics of the surface reaction and the influence of decreasing carbon transfer coefficient ß on the carbon concentration profile were estimated. Numerical calculations were developed to determine the carbon transfer coefficient ß .