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

  • Author / Creator
    Borle, Steven D
  • 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.

  • Subjects / Keywords
  • Graduation date
    Spring 2014
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.