Effect of direct cooling condisions on the microstructure and properties of hot-forged HSLA steels for mining applications
PBN-AR
Instytucja
Sieć Badawcza Łukasiewicz - Instytut Metalurgii Żelaza im. Stanisława Staszica
Źródłowe zdarzenia ewaluacyjne
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Materiali in Tehnologije
ISSN
1580-2949
EISSN
Wydawca
INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE
DOI
URL
Rok publikacji
2016
Numer zeszytu
5
Strony od-do
783-789
Numer tomu
50
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
en
thermomechanical processing
drop forging
accelerated cooling
grain refinement
tempered martensite
Streszczenia
Język
en
Treść
The article presents hot deformation and controlled direct cooling of hardened medium-carbon HSLA steel with micro-additions of alloying elements Ti and/or V. It also contains a study of the effect of thermomechanical-processing conditions on grain refinement and precipitation kinetics in the replacement of the conventional reheating-requiring heat treatment with a cost-effective technology. Controlled cooling with accelerated air and mist adjusted to lower carbon and hardenability-related alloying elements by means of employing experimentally designed heats, varying in the Mo content, was designed to meet the mining-industry requirements for mechanical properties. Besides microstructural-property relations, the vital problem of non-uniformity of the obtained properties is addressed with regard to within-part variances in the cooling rate of the as-forged, undeformed and dynamically recrystallized material. The strength and plasticity versus the microstructure of the produced fine pearlite/bainite structure with grain-boundary ferrite were evaluated. Microstructure-property relations allowed the formulation of the conclusions on the effect of direct-cooling conditions on the microstructure and grain substructure, their mutual synergic effect in controlling the microstructure, as well as guidelines for the transfer of the locally established process parameters into technological conditions.
Cechy publikacji
discipline:Inżynieria materiałowa
discipline:Metalurgia
discipline:Materials science
discipline:Metallurgy
Original article
Original article presents the results of original research or experiment.
Oryginalny artykuł naukowy
Oryginalny artykuł naukowy przedstawia rezultaty oryginalnych badań naukowych lub eksperymentu.
Inne
System-identifier
PBN-R:754363
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