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| 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. (en)
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| Title
| - Evaluation of Chemical Heterogenity of a 90-ton Forging Ingot
- Evaluation of Chemical Heterogenity of a 90-ton Forging Ingot (en)
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| skos:prefLabel
| - Evaluation of Chemical Heterogenity of a 90-ton Forging Ingot
- Evaluation of Chemical Heterogenity of a 90-ton Forging Ingot (en)
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| skos:notation
| - RIV/25877950:_____/12:#0000056!RIV14-MPO-25877950
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/25877950:_____/12:#0000056
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - heavy steel ingot; macro-segregation; chemical heterogenity; penetration test; optical spectrom (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
| - Archives of Materials Science and Engineering
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Machovčák, Pavel
- Michalek, Karel
- Tkadlečková, Markéta
- Carbol, Zdeněk
- Trefil, Antonín
- Opler, Aleš
- Merta, Karel
- Zaoral, Jakub
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| number of pages
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