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Grain size evolution and mechanical properties of Nb, V-Nb, and Ti-Nb boron type S1100QL steels
ID Foder, Jan (Avtor), ID Burja, Jaka (Avtor), ID Klančnik, Grega (Avtor)

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Izvleček
Titanium additions are often used for boron factor and primary austenite grain size control in boron high- and ultra-high-strength alloys. Due to the risk of formation of coarse TiN during solidification the addition of titanium is limited in respect to nitrogen. The risk of coarse nitrides working as non-metallic inclusions formed in the last solidification front can degrade fatigue properties and weldability of the final product. In the presented study three microalloying systems with minor additions were tested, two without any titanium addition, to evaluate grain size evolution and mechanical properties with pre-defined as-cast, hot forging, hot rolling, and off-line heat-treatment strategy to meet demands for S1100QL steel. Microstructure evolution from hot-forged to final martensitic microstructure was observed, continuous cooling transformation diagrams of non-deformed austenite were constructed for off-line heat treatment, and the mechanical properties of Nb and V–Nb were compared to Ti–Nb microalloying system with a limited titanium addition. Using the parameters in the laboratory environment all three micro-alloying systems can provide needed mechanical properties, especially the Ti–Nb system can be successfully replaced with V–Nb having the highest response in tensile properties and still obtaining satisfying toughness of 27 J at −40 °C using Charpy V-notch samples.

Jezik:Angleški jezik
Ključne besede:S1100QL, grain size, microalloying, vanadium, niobium, titanium, boron, mechanical properties, microstructure, non-metallic inclusion
Vrsta gradiva:Članek v reviji
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:NTF - Naravoslovnotehniška fakulteta
Status publikacije:Objavljeno
Različica publikacije:Objavljena publikacija
Leto izida:2021
Št. strani:16 str.
Številčenje:Vol. 11, iss. 3, art. 492
PID:20.500.12556/RUL-135213 Povezava se odpre v novem oknu
UDK:620.1/.2
ISSN pri članku:2075-4701
DOI:10.3390/met11030492 Povezava se odpre v novem oknu
COBISS.SI-ID:55642883 Povezava se odpre v novem oknu
Datum objave v RUL:01.03.2022
Število ogledov:1456
Število prenosov:164
Metapodatki:XML DC-XML DC-RDF
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Gradivo je del revije

Naslov:Metals
Skrajšan naslov:Metals
Založnik:MDPI AG
ISSN:2075-4701
COBISS.SI-ID:15976214 Povezava se odpre v novem oknu

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:16.03.2021

Projekti

Financer:Drugi - Drug financer ali več financerjev
Program financ.:Republic of Slovenia
Številka projekta:C3330-18-952013

Financer:EC - European Commission
Program financ.:European Social Fund

Financer:EC - European Commission
Program financ.:European Regional Development Fund

Financer:EC - European Commission
Program financ.:Cohesion Fund

Financer:Drugi - Drug financer ali več financerjev
Program financ.:Republic of Slovenia
Akronim:ČMRLJ

Financer:EC - European Commission
Program financ.:European Regional Development Fund
Akronim:ČMRLJ

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