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Statements

Subject Item
n2:RIV%2F25877950%3A_____%2F12%3A%230000056%21RIV14-MPO-25877950
rdf:type
skos:Concept n17:Vysledek
dcterms:description
Heavy forging ingots are used in metallurgy engineering e.g. for the production crankshafts for marine engines, production of special parts for conventional, hydro and power engineering, rotor shafts, steam generators, heat exchangers and collectors for both conventional and nuclear power engineering. A production of heavy forging ingots is usually accompanied by a segregation of elements in the structure of steel. The segregation of the elements causes anisotropy of mechanical properties. But these mechanical parts must meet the strictest criteria, and therefore must be practically free of defects. In order to achieve the best possible quality of heavy forging ingots, the project focused on improving the useful properties of special machine parts in VÍTKOVICE HEAVY MACHINERY a.s. (further also VHM) together in cooperation with Technical University of Ostrava (VŠB) was started. The experimental ingot 8K91SF weighing almost 90 tons was cast due the performance a detailed analysis of the current state of casting and solidification. The ingot was cut and macrostructure and chemical heterogeneity of the ingot was evaluated in detail. This article describes performance of the experimental ingot casting, the way of cutting, the methodology of chemical analysis and the results of that investigation. The standard method used in metallurgical analytics – analyses using optical emission spectrometers – was not applicable due to the large number of required analyzes. Thus, the mobile optical spectrometer SPECRTOTEST was used for analysis of Mn, Si, Cu a Ni content. The gained knowledge is also used to specification of the setting of boundary conditions of the numerical simulations, which should help to optimize the production technology of casting heavy forging ingots and minimize the range of segregation in ingots. Heavy forging ingots are used in metallurgy engineering e.g. for the production crankshafts for marine engines, production of special parts for conventional, hydro and power engineering, rotor shafts, steam generators, heat exchangers and collectors for both conventional and nuclear power engineering. A production of heavy forging ingots is usually accompanied by a segregation of elements in the structure of steel. The segregation of the elements causes anisotropy of mechanical properties. But these mechanical parts must meet the strictest criteria, and therefore must be practically free of defects. In order to achieve the best possible quality of heavy forging ingots, the project focused on improving the useful properties of special machine parts in VÍTKOVICE HEAVY MACHINERY a.s. (further also VHM) together in cooperation with Technical University of Ostrava (VŠB) was started. The experimental ingot 8K91SF weighing almost 90 tons was cast due the performance a detailed analysis of the current state of casting and solidification. The ingot was cut and macrostructure and chemical heterogeneity of the ingot was evaluated in detail. This article describes performance of the experimental ingot casting, the way of cutting, the methodology of chemical analysis and the results of that investigation. The standard method used in metallurgical analytics – analyses using optical emission spectrometers – was not applicable due to the large number of required analyzes. Thus, the mobile optical spectrometer SPECRTOTEST was used for analysis of Mn, Si, Cu a Ni content. The gained knowledge is also used to specification of the setting of boundary conditions of the numerical simulations, which should help to optimize the production technology of casting heavy forging ingots and minimize the range of segregation in ingots.
dcterms:title
Evaluation of Chemical Heterogenity of a 90-ton Forging Ingot Evaluation of Chemical Heterogenity of a 90-ton Forging Ingot
skos:prefLabel
Evaluation of Chemical Heterogenity of a 90-ton Forging Ingot Evaluation of Chemical Heterogenity of a 90-ton Forging Ingot
skos:notation
RIV/25877950:_____/12:#0000056!RIV14-MPO-25877950
n17:predkladatel
n18:ico%3A25877950
n3:aktivita
n14:P
n3:aktivity
P(FR-TI3/243)
n3:cisloPeriodika
1
n3:dodaniDat
n9:2014
n3:domaciTvurceVysledku
n7:2559315 n7:8440522 n7:3567311 n7:2728478
n3:druhVysledku
n15:J
n3:duvernostUdaju
n16:S
n3:entitaPredkladatele
n13:predkladatel
n3:idSjednocenehoVysledku
135071
n3:idVysledku
RIV/25877950:_____/12:#0000056
n3:jazykVysledku
n10:eng
n3:klicovaSlova
heavy steel ingot; macro-segregation; chemical heterogenity; penetration test; optical spectrom
n3:klicoveSlovo
n4:heavy%20steel%20ingot n4:chemical%20heterogenity n4:macro-segregation n4:optical%20spectrom n4:penetration%20test
n3:kodStatuVydavatele
PL - Polská republika
n3:kontrolniKodProRIV
[EA82AB76AA5A]
n3:nazevZdroje
Archives of Materials Science and Engineering
n3:obor
n5:JG
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
8
n3:projekt
n12:FR-TI3%2F243
n3:rokUplatneniVysledku
n9:2012
n3:svazekPeriodika
58
n3:tvurceVysledku
Michalek, Karel Machovčák, Pavel Carbol, Zdeněk Opler, Aleš Zaoral, Jakub Trefil, Antonín Tkadlečková, Markéta Merta, Karel
s:issn
1897-2764
s:numberOfPages
6