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dc.contributor.authorBublíková, Dagmar
dc.contributor.authorJirková, Hana
dc.contributor.authorJeníček, Štěpán
dc.contributor.authorStehlík, Adam
dc.date.accessioned2019-03-04T11:50:31Z-
dc.date.available2019-03-04T11:50:31Z-
dc.date.issued2018
dc.identifier.citationBUBLÍKOVÁ, D., JIRKOVÁ, H., JENÍČEK, Š., STEHLÍK, A. Heat treatment of closed-die forgings of low-alloy AHSS steels. In: Annals of DAAAM and Proceedings of the International DAAAM Symposium. Vídeň, Rakousko: DAAAM International Vienna, 2018. s. 714-718. ISBN 978-3-902734-20-4 , ISSN 1726-9679.en
dc.identifier.isbn978-3-902734-20-4
dc.identifier.issn1726-9679
dc.identifier.uri2-s2.0-85060111607
dc.identifier.urihttp://hdl.handle.net/11025/31121
dc.format5 s.cs
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherDAAAM International Viennaen
dc.relation.ispartofseriesAnnals of DAAAM and Proceedings of the International DAAAM Symposiumen
dc.rightsPlný text je přístupný v rámci univerzity přihlášeným uživatelům.cs
dc.rights© DAAAM International Viennaen
dc.subjectzápustkové výkovkycs
dc.subjectQ-P procescs
dc.subjectzbytkový austenitcs
dc.subjectRTG difrakcecs
dc.titleHeat treatment of closed-die forgings of low-allow AHSS steelsen
dc.title.alternativeTepelné zpracování zápustkových výkovků z nízkolegovaných AHSS ocelícs
dc.typekonferenční příspěvekcs
dc.typeconferenceObjecten
dc.rights.accessrestrictedAccessen
dc.type.versionpublishedVersionen
dc.description.abstract-translatedNew methods are sought today for improving the mechanical properties of heavy-duty parts of high-strength steels, particularly in the automotive industry. AHS steels tend to be associated with high strength and hardness, which are achieved at the cost of poor ductility. Nevertheless, ductility can be improved: by alloying or by creating an additional phase through heat treatment. In the present study, this phase was retained austenite which, if present in a stable condition in a martensitic matrix, improves the material’s ductility. The experimental steel was specially alloyed in order to depress the Ms and Mf temperatures. It contained 2.5% manganese, 2.09% silicon and 1.34% chromium, with additions of nickel and molybdenum. An actual closed-die forged part was made of this steel. This forged part was then fitted with thermocouples attached to its surface and in its interior and treated using the Q&P process. The Q&P process is an innovative heat treatment procedure. It is characterized by rapid cooling from the soaking temperature to a quenching temperature between the Ms and Mf. Subsequent reheating and holding at a partitioning temperature stabilizes retained austenite in martensitic matrix. Cooling was performed in boiling water and then in still air without tempering.en
dc.subject.translatedclosed-die forgingsen
dc.subject.translatedQ&P processen
dc.subject.translatedretained austeniteen
dc.subject.translatedX-ray diffractionen
dc.identifier.doi10.2507/29th.daaam.proceedings.103
dc.type.statusPeer-revieweden
dc.identifier.obd43923998
dc.project.IDSGS-2016-060/Výzkum moderních AHS ocelí a inovativních procesů pro jejich zpracovánícs
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