Abstract
Chromium-containing steels must be sintered in dry atmospheres with low partial pressures of oxygen, such as nitrogen–hydrogen mixtures. The conventional endogas atmospheres have a potential to carburize the main steel and simultaneously oxidize alloying elements, e.g. Cr and Mn, preventing proper sintering. Fe–1.5% Mn–1.5% Cr–0.25% Mo–0.4% C steel is successfully sintered in flowing technical nitrogen by controlling the local microatmosphere, through the use of semiclosed container/getter/activator combinations. Then, the necessary reducing reactions are induced in the dry microatmosphere within and around the specimens. As manganese has a higher affinity for oxygen than chromium, chromium oxide is reduced by relying only on carbon and manganese in the semi-closed container. Mechanical properties of the specimens sintered in technical nitrogen do not significantly differ from those sintered in dry hydrogen.
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.
