Authors:
Maheswaran Vattur Sundaram (Höganäs AB, Sweden),
Fabien Currit (Höganäs AB, Sweden),
Michael Andersson (Höganäs AB, Sweden),
Dimitris Chasoglou (Höganäs AB, Sweden)
Abstract:
The properties and the performance of PM steels can be tailored and enhanced by performing an appropriate heat treatment process after sintering. Conventional gas carburising (CQT) is the most used process for PM steels, whereas for Cr-alloyed PM steels, casehardening by low-pressure carburising (LPC) is gaining interest due to its oxide free process and better control over case depth. Also, when combined with high-pressure gas quenching (GQ) it provides less distortion in the components. In this work, Cr-alloyed PM steel with and without Ni additions were evaluated after both the CQT and LPC heat treatment process. The mechanical properties and performances were evaluated, and the results obtained indicated a strong correlation between the obtained properties and resulting microstructures based on the alloying elements and optimised heat treatment process.
DOI:
https://doi.org/10.59499/WP225371514