Abstract
The effect of cerium addition on the VIM refining process of oxygen, sulfur, and nitrogen in a nickel-chromium alloy and the Udimet 901 iron-nickel-base superalloy is presented. It was found that cerium reduces sulfur and oxygen content effectively through the formation of cerium oxides, sulfides, and oxysulfides but did not reduce the already low nitrogen content. The kinetics of oxygen and sulfur depletion in the VIM heats follow the first order reaction rate theory and the proposed mechanism is that of the drift of inclusions to crucible skulls. The maximum addition of cerium to iron-nickel-base alloys is limited by segregation effects that lead to hot shortness.
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.
