Authors:
Michael Andersson (1), Pernilla Johansson (2), Heike Heinrich (2)
1- Höganäs AB, Sweden
2- Höganäs Sweden AB
Abstract:
Sinter hardening is a cost efficient manufacturing process for press and sinter. At the same time material selection is crucial to make sure sufficient hardenability is reached. By selecting a higher alloyed material, hardenability can easily be satisfied, however this also increases the material cost. Thus, it’s interesting to be able to optimize the composition. In this paper the potential to use Astaloyâ CrS, a newly developed lean chromium grade, is investigated for sinter hardening with different combinations with nickel and graphite.
A model is presented, where the cooling rates for sinter hardening conditions are calculated and combined with a calculation of the martensite transformation from a Time Temperature Transformation diagram (TTT). It’s demonstrated how the martensite content after heat treatment can be estimated by taking factors such as material composition, component size and quenching conditions into account. The calculated results are also compared with experiments in the paper. In the end, the tool can help making sure a component is properly hardened while optimizing the material composition cost.
DOI:
https://doi.org/10.59499/EP246277150
