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The Real Benefits Of High Sintering Temperatures On The Properties Of Low Alloy Sintered Steels Containing Masteralloys

  • : Raquel De Oro Calderon1, Maryam Jaliliziyaeia2, John Dunkley3, Christian Gierl-Mayer2, Herbert Danninger2
  • : 1Institute of Chemical Technologies and Analytics Vienna University of Technology, 2TU Wien, 3Atomizing Systems Limited
  • : PDF Download
  • : 2018

Abstract

High sintering temperatures provide a significant increase in the mechanical performance of low alloy sintered steels particularly for those containing elements such as Cr Mn and Si with a high oxygen-affinity (both in prealloyed and masteralloy approaches). However such high temperatures are often less attractive for industrial production. In the particular case of masteralloys the differences in properties can be attributed to various phenomena: enhanced reduction of oxides changes in the morphology of the pores improved dissolution of masteralloy particles and thus better distribution of alloying elements etc. In this work sintered steels containing a cost-effective Fe-Mn-Si-C masteralloy are processed at increasing temperatures in the range between 1120 and 1300 °C. Evaluation of microstructure interstitial contents density and mechanical properties as a function of temperature allow understanding the real benefits of increasing the sintering temperature in order to find an appropriate balance between the economic requirements and the material performance

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