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CFD Analyses Of The Gas Flow Inside The Vessel Of A Hot Isostatic Press

  • : Hjärne, J1
  • : 1Avure Technologies AB
  • : PDF Download
  • : 2012

Abstract

Hot isostatic pressing (HIP) is a thermal treatment method that is used to consolidate, densify or bond materials. Previously, Uniform Rapid Cooling (URC) HIP-furnaces could manage up to a 50% reduction in total cycle time. Through concentrated research, testing and numerical modeling Avure has now engineered a furnace that cuts this time by 70%, allowing up to three complete cycles in an eight-hour shift. The essential key is temperature uniformity. Without it, there is excessive grain growth, residual stresses, distortion, warping and cracking. The URC-furnace presented in this paper avoids these problems by distributing cooling gas quickly and evenly to the entire load. This paper shows how Avure uses computational fluid dynamics to evaluate the uniformity and cooling rates in our HIP-furnaces. This research will enhance and amplify the benefits already available to HIP-users: zero internal porosity, high tensile strength and hardness, excellent fatigue resistance, and superior corrosion resistance.
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