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Hot workability of a high carbon high chromium tool steel

Akbarzadeh, A ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matdes.2012.10.055
  3. Publisher: 2013
  4. Abstract:
  5. In this work, hot tension tests were conducted on as cast and wrought samples of a high carbon high chromium tool steel to study the hot workability under the rolling conditions. The flow curves illustrate the classical shape of dynamic recrystallization (DRX). It is observed that broken carbide nets in the wrought samples result in lower deformation activation energy 398. kJ/mol in comparison to the as cast samples 432. kJ/mol. Necking strains were calculated using the inflection point of the work-hardening (θ) vs. stress curves. Wrought samples show higher hot ductility and lower maximum stress than the as cast ones. It is shown that lower activation energy of deformation and lower stress concentration around the smaller carbides in the wrought samples is responsible for their higher hot workability
  6. Keywords:
  7. Dynamic recrystallization ; High carbon high chromium tool steel ; Hot tension ; Hot workability ; As-cast ; Deformation activation energy ; Energy of deformation ; Flow curves ; Hot tension ; Inflection points ; Maximum stress ; Rolling conditions ; Tension tests ; Activation energy ; Carbides ; Carbon ; Chromium ; Stress concentration ; Tensile testing ; Tool steel ; Hot rolling
  8. Source: Materials and Design ; Volume 46 , 2013 , Pages 654-659 ; 02641275 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0261306912007534