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Microstructural behaviour of tempering steels during precision forging and quenching from hot-forming temperatures

F. Nürnberger, O. Grydin, Z. Yu, M. Schaper

Research output: Contribution to journalArticleResearchpeer review

Abstract

To design a precision forging or twin-roll casting process combined with heat treating from the hot-forming temperature, flow curves for a selection of hardening and tempering steels were recorded using a deformation dilatometer. In addition to this, continuous cooling transformation diagrams were generated for the 42CrMo4 hardening and tempering steel. These diagrams take into account the influence of deformation on the transformation behaviour during quenching from a temperature of 850 °C. The results of the investigations show an increase in the flow stresses with decreasing temperatures and the deformation's minor influence on the resulting material's hardness and microstructural constituents.

Original languageEnglish
Pages (from-to)79-86
Number of pages8
JournalMetallurgical and Mining Industry
Volume3
Issue number7
Publication statusPublished - 2011

Keywords

  • CCT
  • Flow curves
  • Quenching from hot-forming temperature
  • Tempering steel

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Earth and Planetary Sciences (miscellaneous)
  • Electrical and Electronic Engineering

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