Ma. Neri et al., EFFECT OF DEFORMATION ON GRAPHITIZATION KINETICS IN HIGH-CARBON STEELS, Journal of materials processing technology, 83(1-3), 1998, pp. 142-150
Citations number
17
Categorie Soggetti
Material Science","Engineering, Manufacturing","Engineering, Industrial
Transformation of iron carbide into graphite (graphitization) was obse
rved to occur during industrial processing of high carbon thin strip s
teel. Samples of cold rolled and isothermally annealed steels (AISI ty
pes 1075 and 1095) were taken along their processing route and were su
bjected to a series of isothermal annealing treatments in the temperat
ure range of 560-680 degrees C for periods of time ranging from 20 to
500 h. The structures of the different samples were those of cold roll
ing (spheroidized carbides within a deformed ferritic matrix) and subc
ritical annealing (spheroidized carbides in undeformed ferrite). Tt wa
s found that the rate of graphitization depends on the type of steel a
nd degree of deformation. No graphite was found in samples from the lo
wer carbon steel which were subcritically annealed, although they were
observed in specimens from the other steel which were cold rolled to
a reduction of 50% prior to the subcritical annealing. (C) 1998 Elsevi
er Science S.A. All rights reserved.