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Warm Die Compaction Of A High Density Crankshaft Sprocket

  • : Jordi Villamana1, Hari Krishna Nagalla1, Ricard Claramunt1, Francis Hanejko2
  • : 1Motherson Sintermetal Products, 2Hoeganaes Corporation
  • : PDF Download
  • : 2016

Abstract

Original Equipment Manufacturers (OEMs) are demanding higher properties in ferrous PM components as engine sizes shrink and the performance/weight ratio increases.  One method to achieve enhanced mechanical properties is to attain high densities along with the proper alloy system.  A recently developed lubricant system has been engineered to enable PM part production with lubricant levels as low as 0.25 weight percent and green densities in excess of 7.4 g/cm³ at compaction pressures of approximately 750 MPa.  This system has been successfully used in the production of a crankshaft sprocket with teeth density requirements exceeding 7.20 g/cm3, overcoming green part defects present with prior lubricant systems.  Details of the processing, microstructure and resulting mechanical properties will be presented.

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