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| Abstract No.: |
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Scheduled at:
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Thursday, May 12, 2016, Room 3G 9:40 AM
HVOF- / HVAF-Spraying
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| Title: |
Effects of powder structures and HVOF processes on erosion wear performance of WC-10Co4Cr coatings
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| Authors: |
Zhangxiong Ding / wuhan university of Technology, China
Xiang Ding / Wuhan University of Technology, China
Xu-dong Cheng/ Wuhan University of Technology, China
Jin Shi*/ Wuhan University of Technology, China
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| Abstract: |
Conventional and multimodal WC-10Co4Cr cermet coatings were prepared respectively by High Velocity Oxygen Gas Fuel spraying (HVOGF) and High Velocity Oxygen Liquid Fuel spraying (HVOLF), and the coating structures were analyzed by OM, SEM, XRD. Porosity, microhardness and fracture toughness of the coatings were measured. Resistance of coatings to sand solid erosion wear tests were carried out and their wear failure mechanisms were explored. Results showed that the mechanical properties of WC-10Co4Cr coatings deposited by HVOLF are much more superior than those deposited by HVOGF. Multimodal WC-10Co4Cr coating deposited by HVOLF had the highest microhardness and fracture toughness, the lowest porosity, the most excellent resistance of sand solid erosion wear. The sand solid erosion resistance of multimodal WC-10Co4Cr coating produced by HVOLF is respectively enhanced above 15% and 40% than conventional coatings deposited by HVOLF at 30°and 90°impact angles, and its sand solid erosion resistance is approximate 3 times than multimodal coatings deposited by HVOGF at 30°and 90°impact angles.
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