About: Rapid Spheroidization and Grain Refinement Caused by Thermomechanical Treatment for Plain Structural Steel     Goto   Sponge   NotDistinct   Permalink

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  • The cold formability of ferritic-pearlitic steels is one of the base parameters for material choice for different forming parts. One of the key factors is the pearlite morphology, which is strongly dependent on chemical composition and previous treatment history. The carbides in pearlite occur mainly in the lamellar form. One of the ways of improving the ductility along with formability is the change of lamellar carbides to globular carbides. This can be conventionally done by soft annealing, which is characterised by long processing times and high energy costs. This paper presents a new processing modification which can lead on the one hand to significant shortening of carbide spheroidization times and on the other hand to intensive refinement of grain size even for low-carbon steels. Low temperature thermomechanical treatment with variation of the heating temperature around Ac1 and incremental deformation was examined on low carbon plain RSt-32 steel. After the thermomechanical treatment conditions were optimized, the refinement of the ferritic grains from an initial 30 mým to circa 5 mým took place, and the time necessary for carbide spheroidization was shortened from several hours to several seconds.
  • The cold formability of ferritic-pearlitic steels is one of the base parameters for material choice for different forming parts. One of the key factors is the pearlite morphology, which is strongly dependent on chemical composition and previous treatment history. The carbides in pearlite occur mainly in the lamellar form. One of the ways of improving the ductility along with formability is the change of lamellar carbides to globular carbides. This can be conventionally done by soft annealing, which is characterised by long processing times and high energy costs. This paper presents a new processing modification which can lead on the one hand to significant shortening of carbide spheroidization times and on the other hand to intensive refinement of grain size even for low-carbon steels. Low temperature thermomechanical treatment with variation of the heating temperature around Ac1 and incremental deformation was examined on low carbon plain RSt-32 steel. After the thermomechanical treatment conditions were optimized, the refinement of the ferritic grains from an initial 30 mým to circa 5 mým took place, and the time necessary for carbide spheroidization was shortened from several hours to several seconds. (en)
Title
  • Rapid Spheroidization and Grain Refinement Caused by Thermomechanical Treatment for Plain Structural Steel
  • Rapid Spheroidization and Grain Refinement Caused by Thermomechanical Treatment for Plain Structural Steel (en)
skos:prefLabel
  • Rapid Spheroidization and Grain Refinement Caused by Thermomechanical Treatment for Plain Structural Steel
  • Rapid Spheroidization and Grain Refinement Caused by Thermomechanical Treatment for Plain Structural Steel (en)
skos:notation
  • RIV/49777513:23210/12:43897003!RIV13-GA0-23210___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GAP107/10/2272)
http://linked.open...iv/cisloPeriodika
  • Neuveden
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http://linked.open...aciTvurceVysledku
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  • 164105
http://linked.open...ai/riv/idVysledku
  • RIV/49777513:23210/12:43897003
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  • thermomechanical treatment; carbide morphology; rapid spheroidization (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • CH - Švýcarská konfederace
http://linked.open...ontrolniKodProRIV
  • [324B5BCB06BD]
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  • Materials Science Forum
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http://linked.open...v/svazekPeriodika
  • 706-709
http://linked.open...iv/tvurceVysledku
  • Jirková, Hana
  • Kučerová, Ludmila
  • Mašek, Bohuslav
http://linked.open...ain/vavai/riv/wos
  • 000308517301196
issn
  • 0255-5476
number of pages
http://bibframe.org/vocab/doi
  • 10.4028/www.scientific.net/MSF.706-709.2770
http://localhost/t...ganizacniJednotka
  • 23210
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