In this thesis, the results of oxidation and decarburization
experiments with pure iron-carbon alloys over the temperature range
800 - 950ºc, and in atmospheres of varying carbon monoxide - carbon
dioxide ratio are reported. Most of the experimental work is concerned
with a 1.065 weight percent carbon alloy at temperatures where austenite
is the stable phase. Complex kinetic behaviour was observed for this
alloy in the range 10 - 100 volume percent carbon dioxide. An analysis
is given which in turn associates the kinetics with a pure diffusion
controlled decarburization model and a pure surface controlled decarburization model. The latter best represents the interaction of the
decarburization mechanism with the scaling process on Y - iron.
Metallographic evidence is provided where possible in support of the
results of the afore-mentioned analysis. Mathematical relations are
introduced which attempt to describe qualitatively the kinetics of the
carbon alloys in all the atmospheres employed. A statement is made as
to the applicability of the model to carbon steels in general at
temperatures where austenite is the stable phase and where the atmospheres employed are of various carbon monoxide - carbon dioxide ratio. / Thesis / Master of Science (MS)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/15384 |
| Date | 04 1900 |
| Creators | Billings, Gary John |
| Contributors | Smeltzer, W. W., Metallurgy |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
| Type | Thesis |
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