Abstract
In this work, a pre-alloyed powder of Fe-3% Cr-0.5% Mo was admixed with boron nitride (BN) and graphite powder (0 to 0.4%). The tensile test specimens with the green density about 6.5 g/cm3 were compacted. The specimens were sintered in vacuum furnace at 1280°C for 45 min. After sintering process, specimens were cooled in N2 at various cooling rate. The microstructures, mechanical properties of sintered steels were studied. The results showed tensile strength and hardness increased with the increasing carbon content and cooling rate. Furthermore, the addition of BN showed the tensile strength and hardness improvement at low cooling rate. BN resulted on the coarse grain microstructure and progressive grain coarsening. The liquid phases were found at grain boundaries. The microstructures of sintered steels were mixture of ferrite, bainite and martensite. Finally, the addition of boron nitride was found to improve the transformation of bainite. Therefore, the tensile strength and hardness of sintered steel were improved
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.
