About: Clarification of Cause of Defects in Rolled 42CrMo4 Steel Blooms

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	In this paper we return to our previous research aimed at finding the cause of cracking in the core of rolled blooms of 36CrMo4 and 42CrMo4 steels. In those experiments, only the steel upon forming was available. This time we performed a laboratory wedge test of formability of this steel in as-cast state and compared the regions where cracking occurred with results of FORGE 3D simulation. First cracks began to form when the Cockroft-Latham criterion value was as low as 30 MPa. These are the values which can be expected to be found at the tip of internal cracks under normal plant rolling conditions. Therefore, the laboratory simulation of rolling was performed with both original and modified roll pass designs. It was shown that during rolling in the blooming the tensile stress in the centre of the rolled product is not sufficient to cause crack formation. In this paper we return to our previous research aimed at finding the cause of cracking in the core of rolled blooms of 36CrMo4 and 42CrMo4 steels. In those experiments, only the steel upon forming was available. This time we performed a laboratory wedge test of formability of this steel in as-cast state and compared the regions where cracking occurred with results of FORGE 3D simulation. First cracks began to form when the Cockroft-Latham criterion value was as low as 30 MPa. These are the values which can be expected to be found at the tip of internal cracks under normal plant rolling conditions. Therefore, the laboratory simulation of rolling was performed with both original and modified roll pass designs. It was shown that during rolling in the blooming the tensile stress in the centre of the rolled product is not sufficient to cause crack formation. (en)
Title	Clarification of Cause of Defects in Rolled 42CrMo4 Steel Blooms Clarification of Cause of Defects in Rolled 42CrMo4 Steel Blooms (en)
skos:prefLabel	Clarification of Cause of Defects in Rolled 42CrMo4 Steel Blooms Clarification of Cause of Defects in Rolled 42CrMo4 Steel Blooms (en)
skos:notation	RIV/61989100:27360/10:86075663!RIV12-MSM-27360___
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(MSM6198910015)
http://linked.open...iv/cisloPeriodika	4
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Fabík, Richard Migdal, Milan Sušovský, Michal
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola báňská - Technická univerzita Ostrava / Fakulta metalurgie a materiálového inženýrství
http://linked.open...dnocenehoVysledku	250883
http://linked.open...ai/riv/idVysledku	RIV/61989100:27360/10:86075663
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Cockroft-Latham criterion; finite element method; blooming mill; hot rolling (en)
http://linked.open.../riv/klicoveSlovo	finite element method hot rolling Cockroft-Latham criterion blooming mill
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[6F87A47D6BBA]
http://linked.open...i/riv/nazevZdroje	Hutnické listy
http://linked.open...in/vavai/riv/obor	JG
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	63
http://linked.open...iv/tvurceVysledku	Fabík, Richard Migdal, Milan Sušovský, Michal Kurek, Václav Svider, Radim
http://linked.open...n/vavai/riv/zamer	Structural potentiality and properties of intensively formed materials
issn	0018-8069
number of pages	4 (xsd:int)
http://localhost/t...ganizacniJednotka	27360
is http://linked.open...avai/riv/vysledek of	Clarification of Cause of Defects in Rolled 42CrMo4 Steel Blooms Clarification of Cause of Defects in Rolled 42CrMo4 Steel Blooms

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