Abstract
The wear characteristics of a cobalt-base hardfacing alloy and SUJ2 (ASTM 52100) steel were studied under conditions of unlubricated sliding wear. The maximum specific wear rates were obtained under a sliding velocity of 0.25 m s−1 for cobalt-base alloy SF12 and SF20 specimens. From X-ray diffraction the wear debris was found to be composed of the iron oxide α-Fe2O3 and the spinel-type oxides NiCr2O4 and CoFe2O4 formed by oxidative wear and α-Fe formed by mechanical wear. The quantity of oxide on the wear surface of SUJ2 steel was considerably greater with a velocity of 3.0 m s−1 than with a velocity of 0.25 m s−1. Transfer of iron from the SUJ2 steel specimen to the friction surface of the cobalt hardfaced specimen was readily observed at a velocity of 0.25 m s−1.
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.
