The precision of parts produced by Powder Metallurgy (PM) strongly depends on the careful design of PM process parameters. Among them, high sintering temperature is generally considered as detrimental for dimensional and geometrical precision, and therefore neglected in industrial production. Nevertheless, high sintering temperature would strongly improve mechanical characteristics of PM parts, so that the real influence of high sintering temperature on dimensional and geometrical precision is of great interest for PM companies. This study investigates the influence of sintering temperature (up to 1350 °C) on dimensional and geometrical precision of real parts. Dimensional changes on sintering and the effect of sintering temperature have been evaluated. Geometrical characteristics have been measured both in the green and in the sintered state, and the real influence of sintering temperature has been highlighted. As a conclusion, it has been demonstrated that the larger shrinkage due to the high sintering temperature is not detrimental with respect to the dimensional precision, being it reliably predictable. Moreover, the influence on geometrical characteristics is unexpectedly low. The encouraging results of this study convinced the main PM companies in Europe to further investigate the influence of high sintering temperature, as partners in a Club Project within the European Powder Metallurgy Association (EPMA).

Designing powder metallurgy process: The influence of high sintering temperature on dimensional and geometrical precision / Zago, Marco; Cristofolini, Ilaria; Amirabdollahian, Sasan. - (2021).

Designing powder metallurgy process: The influence of high sintering temperature on dimensional and geometrical precision

Zago, Marco;Cristofolini, Ilaria;Amirabdollahian, Sasan
2021

Abstract

The precision of parts produced by Powder Metallurgy (PM) strongly depends on the careful design of PM process parameters. Among them, high sintering temperature is generally considered as detrimental for dimensional and geometrical precision, and therefore neglected in industrial production. Nevertheless, high sintering temperature would strongly improve mechanical characteristics of PM parts, so that the real influence of high sintering temperature on dimensional and geometrical precision is of great interest for PM companies. This study investigates the influence of sintering temperature (up to 1350 °C) on dimensional and geometrical precision of real parts. Dimensional changes on sintering and the effect of sintering temperature have been evaluated. Geometrical characteristics have been measured both in the green and in the sintered state, and the real influence of sintering temperature has been highlighted. As a conclusion, it has been demonstrated that the larger shrinkage due to the high sintering temperature is not detrimental with respect to the dimensional precision, being it reliably predictable. Moreover, the influence on geometrical characteristics is unexpectedly low. The encouraging results of this study convinced the main PM companies in Europe to further investigate the influence of high sintering temperature, as partners in a Club Project within the European Powder Metallurgy Association (EPMA).
Advances on Mechanics, Design Engineering and Manufacturing 3: Proceedings of the International Joint Conference on Mechanics, Design Engineering and Advanced Manufacturing, JCM 2020, June 2-4, 2020
Switzerland
Springer Nature
978-3-030-70566-4
978-3-030-70565-7
Zago, Marco; Cristofolini, Ilaria; Amirabdollahian, Sasan
Designing powder metallurgy process: The influence of high sintering temperature on dimensional and geometrical precision / Zago, Marco; Cristofolini, Ilaria; Amirabdollahian, Sasan. - (2021).
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/293854
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