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| rdf:type
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| Description
| - Innovative processing strategies of high-strength steels enable better combinations of strength and ductility than the classical ones. One of these new heat treatment methods is also quenching and partitioning (Q-P) process, which benefits from a positive effect of retained austenite on mechanical properties. Resulting microstructure after Q-P process consists of martensite with 5-15% of retained austenite, which allows it to achieve strengths above 1800MPa with ductility around 10%. In this work was Q-P process incorporated into the more complex thermo-mechanical treatment with incremental deformation, which refines final microstructure and thus further improves its mechanical properties. Three steels with 0.43%C and varying manganese (0,6-1,2%) and silicon (2-2,6%) content were used to investigate the influence of these main alloying elements. The processing began with 100s austenization at 900°C or 950°C. Twenty deformation steps were always applied during the cooling from austenization temperature to 820°C. Further cooling to 200°C was carried out by three different cooling rates 20, 7 and 4.7°C/s. Martensitic-austenitic microstructures were created because this temperature lies between Ms and Mf. The steels were subsequently heated to 250°C, where 600s hold was performed to allow carbon diffusion from supersaturated martensite to austenite. Variations in the cooling rate had pronounced effect on mechanical properties development. The steels reached ductility A5mm. of 6-15% with the strengths between 1570 MPa and 2060 MPa.
- Innovative processing strategies of high-strength steels enable better combinations of strength and ductility than the classical ones. One of these new heat treatment methods is also quenching and partitioning (Q-P) process, which benefits from a positive effect of retained austenite on mechanical properties. Resulting microstructure after Q-P process consists of martensite with 5-15% of retained austenite, which allows it to achieve strengths above 1800MPa with ductility around 10%. In this work was Q-P process incorporated into the more complex thermo-mechanical treatment with incremental deformation, which refines final microstructure and thus further improves its mechanical properties. Three steels with 0.43%C and varying manganese (0,6-1,2%) and silicon (2-2,6%) content were used to investigate the influence of these main alloying elements. The processing began with 100s austenization at 900°C or 950°C. Twenty deformation steps were always applied during the cooling from austenization temperature to 820°C. Further cooling to 200°C was carried out by three different cooling rates 20, 7 and 4.7°C/s. Martensitic-austenitic microstructures were created because this temperature lies between Ms and Mf. The steels were subsequently heated to 250°C, where 600s hold was performed to allow carbon diffusion from supersaturated martensite to austenite. Variations in the cooling rate had pronounced effect on mechanical properties development. The steels reached ductility A5mm. of 6-15% with the strengths between 1570 MPa and 2060 MPa. (en)
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| Title
| - The role of a cooling rate in thermo-mechanical treatment with incorporated Q-P process
- The role of a cooling rate in thermo-mechanical treatment with incorporated Q-P process (en)
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| skos:prefLabel
| - The role of a cooling rate in thermo-mechanical treatment with incorporated Q-P process
- The role of a cooling rate in thermo-mechanical treatment with incorporated Q-P process (en)
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| skos:notation
| - RIV/49777513:23210/11:43898907!RIV14-MSM-23210___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(1M06032), P(GA106/09/1968), S
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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/49777513:23210/11:43898907
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - incremental deformation; thermo-mechanical treatment; Q-P process (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...v/mistoKonaniAkce
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| http://linked.open...i/riv/mistoVydani
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
| |
| 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...iv/tvurceVysledku
| - Jirková, Hana
- Kučerová, Ludmila
- Mašek, Bohuslav
- Klauberová, Danuše
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| http://linked.open...vavai/riv/typAkce
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| http://linked.open...ain/vavai/riv/wos
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| http://linked.open.../riv/zahajeniAkce
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| number of pages
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| http://purl.org/ne...btex#hasPublisher
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| https://schema.org/isbn
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| http://localhost/t...ganizacniJednotka
| |
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