Abstract
A self-developed FeTi/CrB composite cored wire and the commercially available stainless amorphous metal (SH-SAM) cored wire were used to form the composite coatings by arc spraying on 20g steel substrates. The coating composition and microstructure were characterized by energy dispersive X-ray spectra, X-ray diffraction and scanning electron microscope. The high temperature erosion properties of FeTi/CrB and SH-SAM coatings were determined at different impact angles and environmental temperatures. The results show that the matrix phase of FeTi/CrB coating consists of FeCr solid solution, with a certain amount of oxide inclusions and boride hard phase, forming a metal matrix composites (MMC) coating reinforced by ceramic particles. Compared with the SH-SAM coating, the FeTi/CrB coating has lower porosity and higher bond strength. The high temperature erosion rate of FeTi/CrB coating is much lower than that of SH-SAM coating at all experimental conditions. The FeTi/CrB coating exhibits good toughness and high spalling resistance attributed to the hard phase at elevated temperature. By contrast, the SH-SAM coating presents more brittle characteristics. The FeTi/CrB MMC coating presents itself as a potential protective coating for circulating fluidized bed boiler.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
