<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Carburizing increases the contact fatigue resistance of sintered steels, but the surface hardening may result the formation of surface brittle cracks due to the combined effect of high hardness and porosity. The effect of carburizing on the embrittlement of the case of a 7.3 g/cm<sup>3</sup> 1.5%Mo - 0.25%C sintered steel was studied. The phenomenon was analyzed theoretically and verified by experiments. The resistance of the carburized steel to surface brittle cracking increases with the load bearing surface and the decrease of the maximum pore size, of the surface microhardness and the friction coefficient. The theoretical analysis was implemented in a design procedure for parts subject to contact stresses.</p></abstract>

Carburizing increases the contact fatigue resistance of sintered steels, but the surface hardening may result the formation of surface brittle cracks due to the combined effect of high hardness and porosity. The effect of carburizing on the embrittlement of the case of a 7.3 g/cm3 1.5%Mo - 0.25%C sintered steel was studied. The phenomenon was analyzed theoretically and verified by experiments. The resistance of the carburized steel to surface brittle cracking increases with the load bearing surface and the decrease of the maximum pore size, of the surface microhardness and the friction coefficient. The theoretical analysis was implemented in a design procedure for parts subject to contact stresses.

Surface Hardening Vs. Surface Embrittlement in Carburizing of Porous Steels

Powder Metallurgy Progress

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

{"article-title":"Surface Hardening Vs. Surface Embrittlement in Carburizing of Porous Steels"}

Carburizing increases the contact fatigue resistance of sintered steels, but the surface hardening may result the formation of surface brittle cracks due to...

Surface Hardening Vs. Surface Embrittlement in Carburizing of Porous Steels

Publié en ligne: 25 juil. 2018

Pages: 21 - 30

DOI: https://doi.org/10.1515/pmp-2018-0003

Mots clés
Carburizing, rolling-sliding, hardening, brittleness, design

© 2018 S. Tesfaye Mekonone et al., published by Sciendo

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

Surface Hardening Vs. Surface Embrittlement in Carburizing of Porous Steels

Publié en ligne: 25 juil. 2018

Pages: 21 - 30

DOI: https://doi.org/10.1515/pmp-2018-0003

Mots clésCarburizing, rolling-sliding, hardening, brittleness, design

© 2018 S. Tesfaye Mekonone et al., published by Sciendo

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

Mots clés
Carburizing, rolling-sliding, hardening, brittleness, design