Enhanced carbide precipitation during tempering of sub-zero Celsius treated AISI 52100 bearing steel

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Abstract

A 1.5%Cr, 1%C bearing steel was sub-zero Celsius treated after quenching.Transmission and reflection (synchrotron) X-Ray Diffraction were applied ex-situ at the HZBBESSY II synchrotron facility to quantify the phase fractions of martensite and austenite and determine the stress state in austenite.
The tempering response of the sub-zero treated material was studied with high resolution dilatometry and compared with the behavior of a reference as-quenched sample.X-Ray Diffraction indicates that sub-zero Celsius treating reduces the content of retained austenite in the material and introduces a state of compression in austenite. Dilatometry indicates that a long isothermal holding at cryogenic temperatures enhanced the precipitation of transition carbides during tempering.
Original languageEnglish
Publication date2013
Number of pages7
Publication statusPublished - 2013
EventHeat Treat & Surface Engineering Conference & Expo 2013 - Chennai Trade Center, Chennai, India
Duration: 16 May 201318 May 2013
Conference number: 27

Conference

ConferenceHeat Treat & Surface Engineering Conference & Expo 2013
Number27
LocationChennai Trade Center
CountryIndia
CityChennai
Period16/05/201318/05/2013

Keywords

  • martensite
  • tempering
  • sub-zero Celsius treatment
  • synchrotron) XRD
  • dilatometry

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