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Development of Internal Cooled Forging Dies Based on Powder Metallurgical Methods

  • : Martin Bonhage1, Bernd-Arno Behrens1
  • : 1Institute of Metal Forming and Metal-Forming Machines
  • : PDF Download
  • : 2014

Abstract

An innovative powder metallurgical study currently being investigated at the IFUM within the subproject E3 of the Collaborative Research Centre 653, is the generation of defined cavities inside a sintered part. The aim of this work is the development of a sintered forging die, made of the hot working steel Thyrotherm 2999 EFS SUPRA, equipped with internal cooling channels. For this purpose a copper tube is embedded inside the green body. During liquid phase sintering the copper melts into the base powder, leaving a defined cavity, the cooling channel. The design of the cooling channel is based on numerical simulations of thermal and mechanical stresses within the forging die. Furthermore, the studies cover the influence of surface contours of the copper tubes (corrugated, plain) on their melting behavior as well as the resulting inner surface of the cooling channel. For advanced investigations, a retroactive densification through a HIP-process is planned.
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