open access publication

Article, 2019

Design for Powder Metallurgy: Predicting Anisotropic Dimensional Change on Sintering of Real Parts

International Journal of Precision Engineering and Manufacturing, ISSN 2005-4602, 2234-7593, Volume 20, 4, Pages 619-630, 10.1007/s12541-019-00030-2

Contributors

Cristofolini, Ilaria 0000-0003-2787-1271 (Corresponding author) [1] Molinari, Alberto [1] Zago, Marco 0000-0002-2798-5482 [1] Amirabdollahian, Sasan 0000-0001-8741-9274 [1] Coube, O. [2] Dougan, Mark James [3] Larsson, Mats [4] Schneider, Markus [5] Valler, Peter 0000-0002-3532-5695 [6] Voglhuber, Juergen [7] Wimbert, L [5]

Affiliations

  1. [1] University of Trento
    2. [NORA names: Italy; Europe, EU; OECD];
  2. [2] European Powder Metallugy Association
    3. [NORA names: United Kingdom; Europe, Non-EU; OECD];
  3. [3] AMES Barcelona Sintering S.A., Camí de Can Ubach, 8, Pol. Ind. “Les Fallulles”, 08620, Sant Vicenç dels Horts, Barcelona, Spain
    4. [NORA names: Spain; Europe, EU; OECD];
  4. [4] Höganäs (Sweden)
    5. [NORA names: Sweden; Europe, EU; Nordic; OECD];
  5. [5] GKN Sinter Metals Engineering GmbH, Krebsöge 10, 42477, Radevormwald, Germany
    6. [NORA names: Germany; Europe, EU; OECD];

Abstract

Anisotropic dimensional change on sintering may strongly affect the precision of parts produced by press and sinter. In previous work a design procedure accounting for anisotropic dimensional change of axi-symmetric parts (disks and rings) has been developed on the basis of experimental data. In this work the procedure has been applied to predict the anisotropic dimensional change of real parts produced in industrial conditions, providing that coaxial rings were identified in the geometry of the actual parts. Parts were highly different for material, complexity of geometry, green density and process conditions. Parts were measured in the green and sintered state and the measured dimensional changes were compared to the predicted ones, finding a good agreement. The procedure was also adapted to predict dimensional change of an oval feature, and highly satisfactory results were obtained.

Keywords

anisotropic dimensional change, axi-symmetric part, changes, coaxial rings, complex, complexity of geometry, conditions, data, density, design, design procedure, dimensional changes, experimental data, features, geometry, green density, industrial conditions, materials, measure dimensional changes, metallurgy, ones, oval features, parts, powder, powder metallurgy, precision, precision of parts, predicted ones, press, procedure, process, processing conditions, real part, results, ring, sintered state, sintering, state

Data Provider: Digital Science

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