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Permanent link (DOI): https://doi.org/10.7939/R3TT4G097

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Microstructural Characterization of Chromium Carbide Overlays and a Study of Alternative Welding Processes for Industrial Wear Applications Open Access

Descriptions

Other title
Subject/Keyword
Welding
Chromium Carbide
SAW
GMAW
PTAW
CCO
LBW
Hard Facing
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Borle, Steven D
Supervisor and department
Mendez, Patricio (Chemical and Materials Engineering)
Examining committee member and department
Li, Dongyang (Chemical and Materials Engineering)
Mendez, Patricio (Chemical and Materials Engineering)
Li, Leijun (Chemical and Materials Engineering)
Joseph, Tim (Civil and Environmental Engineering)
Department
Department of Chemical and Materials Engineering
Specialization
Welding Engineering
Date accepted
2014-01-07T08:39:59Z
Graduation date
2014-06
Degree
Master of Science
Degree level
Master's
Abstract
Microstructural features of chromium carbide overlays (CCOs) were examined in this work. It was found that the microstructures can contain unmelted alloy powders. It was also shown that the structures of the primary M7C3 carbides are long hexagonal rods. Change in the microstructure from the top to the bottom of the welds was found to be caused by compositional changes. Understanding these and the other microstructural characteristics of CCOs will help develop products that have better and more uniform wear resistance throughout. The effect of changing process parameters in SAW and the use of alternative welding processes of LBW, GMAW, and PTAW were also examined. It was found that as the balance was decreased in SAW the amount of dilution declined, which led higher amounts of hypereutectic microstructure, higher volume fraction of primary carbides, and larger primary carbide size.
Language
English
DOI
doi:10.7939/R3TT4G097
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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