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Nitriding of Aluminum Extrusion Die: Effect of Die Geometry

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Abstract

Nitriding of complex-shaped extrusion dies may result in non-uniform nitride layers and hence a required hardness may not be achieved in some regions of the bearing area. The present study is carried out to assess the effect of extrusion die profile on the characteristics and growth behavior of nitride layers so that the critical die design feature can be identified to enhance the uniformity of the nitride layer. For this purpose, AISI H13 steel samples have been manufactured with profiles similar to those of hot extrusion dies. The samples were then gas nitrided under controlled nitriding potential. The uniformity and depth of nitride layers have been investigated in terms of compound layer and total nitride case depth for selected die features. The results of this study indicated the need to include the effect of profile on the nitride layer for the optimal die design with improved service life.

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Acknowledgments

The authors acknowledge the support of King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia, for the funded project, Project # SB080002 and ALUPCO, Saudi Arabia, for this work.

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Authors and Affiliations

  1. Mechanical Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia

    S. S. Akhtar, A. F. M. Arif & B. S. Yilbas

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  1. S. S. Akhtar
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  2. A. F. M. Arif
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  3. B. S. Yilbas
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Correspondence to B. S. Yilbas.

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Akhtar, S.S., Arif, A.F.M. & Yilbas, B.S. Nitriding of Aluminum Extrusion Die: Effect of Die Geometry. J. of Materi Eng and Perform 19, 401–412 (2010). https://doi.org/10.1007/s11665-009-9495-6

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  • DOI: https://doi.org/10.1007/s11665-009-9495-6

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