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Statements

Subject Item
n2:RIV%2F61989100%3A27360%2F13%3A86088583%21RIV14-MPO-27360___
rdf:type
skos:Concept n8:Vysledek
dcterms:description
Due to heterogeneity of structure and to casting defects contained in surface layers of continuously cast blanks with large cross sections the study of their deformation behaviour, and namely of their hot formability is a highly demanding task. Exact plastometric methods in the case of taking of the samples from surface areas do not provide acceptable results, since due to their small sizes they cannot express sufficiently the present structure heterogeneity. Surface layers of material, in which it is possible to expect the biggest occurrence of defects that expand at the subsequent forming till they achieve character of critical cracks, are then removed from the samples by machining. For these reasons the wedge rolling test, performed in partly non-machined samples, proved to be successful for investigation of these continuously cast blanks. One of the freely spreading side surfaces of the sample corresponds to the raw surface of the casting and it is then possible to use it then from efficient investigation of effects of reduced technological formability. This approach was used for investigation of deformation behaviour of low alloyed steels of the type C-Mn-Cr, microalloyed by vanadium or niobium. The heating temperature (1150 to 1340 °C) and rolling temperature (950 to 1150 °C) were the changed parameters. The obtained results were supported by metallographic analyses in non-etched and etched states, by TEM and SEM analyses of present particles (inclusions and precipitates) Due to heterogeneity of structure and to casting defects contained in surface layers of continuously cast blanks with large cross sections the study of their deformation behaviour, and namely of their hot formability is a highly demanding task. Exact plastometric methods in the case of taking of the samples from surface areas do not provide acceptable results, since due to their small sizes they cannot express sufficiently the present structure heterogeneity. Surface layers of material, in which it is possible to expect the biggest occurrence of defects that expand at the subsequent forming till they achieve character of critical cracks, are then removed from the samples by machining. For these reasons the wedge rolling test, performed in partly non-machined samples, proved to be successful for investigation of these continuously cast blanks. One of the freely spreading side surfaces of the sample corresponds to the raw surface of the casting and it is then possible to use it then from efficient investigation of effects of reduced technological formability. This approach was used for investigation of deformation behaviour of low alloyed steels of the type C-Mn-Cr, microalloyed by vanadium or niobium. The heating temperature (1150 to 1340 °C) and rolling temperature (950 to 1150 °C) were the changed parameters. The obtained results were supported by metallographic analyses in non-etched and etched states, by TEM and SEM analyses of present particles (inclusions and precipitates)
dcterms:title
Deformation behaviour of surface layers of continuously cast blanks from C-Mn-Cr steel Deformation behaviour of surface layers of continuously cast blanks from C-Mn-Cr steel
skos:prefLabel
Deformation behaviour of surface layers of continuously cast blanks from C-Mn-Cr steel Deformation behaviour of surface layers of continuously cast blanks from C-Mn-Cr steel
skos:notation
RIV/61989100:27360/13:86088583!RIV14-MPO-27360___
n8:predkladatel
n9:orjk%3A27360
n3:aktivita
n11:S n11:P
n3:aktivity
P(ED0040/01/01), P(FR-TI3/374), S
n3:dodaniDat
n20:2014
n3:domaciTvurceVysledku
n10:8889848 n10:1929968 n10:8067465 n10:3111636 n10:8086702
n3:druhVysledku
n17:D
n3:duvernostUdaju
n14:S
n3:entitaPredkladatele
n22:predkladatel
n3:idSjednocenehoVysledku
68186
n3:idVysledku
RIV/61989100:27360/13:86088583
n3:jazykVysledku
n4:eng
n3:klicovaSlova
SEM; TEM; metallographic analyses; Wedge rolling test
n3:klicoveSlovo
n6:TEM n6:SEM n6:metallographic%20analyses n6:Wedge%20rolling%20test
n3:kontrolniKodProRIV
[DC5E838F9395]
n3:mistoKonaniAkce
Brno
n3:mistoVydani
Ostrava
n3:nazevZdroje
METAL 2013 : 22nd International Conference on Metallurgy and Materials : conference proceedings : May 15th - 17th 2013, Hotel Voronez I, Brno Czech Republic, EU [CD-ROM]
n3:obor
n16:JG
n3:pocetDomacichTvurcuVysledku
5
n3:pocetTvurcuVysledku
7
n3:projekt
n15:FR-TI3%2F374 n15:ED0040%2F01%2F01
n3:rokUplatneniVysledku
n20:2013
n3:tvurceVysledku
Turoňová, Petra Rusz, Stanislav Kawulok, Petr Sojka, Jaroslav Kawulok, Rostislav Schindler, Ivo Turoň, Rostislav
n3:typAkce
n18:WRD
n3:zahajeniAkce
2013-05-15+02:00
s:numberOfPages
6
n19:hasPublisher
Tanger s.r.o.
n21:isbn
978-80-87294-41-3
n5:organizacniJednotka
27360