<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Sinter hardening is a technique that is frequently employed in powder metallurgy parts production since it is an economical, clean, and environmentally friendly procedure. Since the cooling rates are however significantly lower than e.g. in water or oil quenching, alloy systems have to be used that ensure martensite formation already at moderate cooling rates. In the present study, quenching dilatometry was used to investigate the hardenability of two types of Cr pre-alloyed steels, Fe-3Cr-0.5Mo and Fe-1.5Cr-0.2Mo, the carbon content being varied, and sinter hardening diagrams were plotted. It showed that this parameter has a pronounced influence on the hardenability of the 3 % Cr alloy; in particular in the range 0.3…0.4 % combined C. For the lower alloyed system, in contrast, even 0.52 % combined C was insufficient to ensure martensite formation at the cooling rates typical for industrial sinter hardening. Finally, impact test specimens were prepared by sinter hardening at cooling rates typical for industry, and hardness, as well as impact energy, were determined.</p>
</abstract>

Sinter hardening is a technique that is frequently employed in powder metallurgy parts production since it is an economical, clean, and environmentally friendly procedure. Since the cooling rates are however significantly lower than e.g. in water or oil quenching, alloy systems have to be used that ensure martensite formation already at moderate cooling rates. In the present study, quenching dilatometry was used to investigate the hardenability of two types of Cr pre-alloyed steels, Fe-3Cr-0.5Mo and Fe-1.5Cr-0.2Mo, the carbon content being varied, and sinter hardening diagrams were plotted. It showed that this parameter has a pronounced influence on the hardenability of the 3 % Cr alloy; in particular in the range 0.3…0.4 % combined C. For the lower alloyed system, in contrast, even 0.52 % combined C was insufficient to ensure martensite formation at the cooling rates typical for industrial sinter hardening. Finally, impact test specimens were prepared by sinter hardening at cooling rates typical for industry, and hardness, as well as impact energy, were determined.

Sinter Hardening of Cr-Mo Pre-Alloyed Steels as a Function of the Carbon Content

Powder Metallurgy Progress

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

{"article-title":"Sinter Hardening of Cr-Mo Pre-Alloyed Steels as a Function of the Carbon Content"}

Sinter hardening is a technique that is frequently employed in powder metallurgy parts production since it is an economical, clean, and environmentally...

Sinter Hardening of Cr-Mo Pre-Alloyed Steels as a Function of the Carbon Content

Publicado en línea: 17 mar 2022

Páginas: 81 - 93

DOI: https://doi.org/10.2478/pmp-2020-0008

Palabras clave
sintered steels, sinter hardening, Cr pre-alloyed, martensite, dilatometry

© 2020 Georg Kalss et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Sinter Hardening of Cr-Mo Pre-Alloyed Steels as a Function of the Carbon Content

Publicado en línea: 17 mar 2022

Páginas: 81 - 93

DOI: https://doi.org/10.2478/pmp-2020-0008

Palabras clavesintered steels, sinter hardening, Cr pre-alloyed, martensite, dilatometry

© 2020 Georg Kalss et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Palabras clave
sintered steels, sinter hardening, Cr pre-alloyed, martensite, dilatometry