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Effects of Nb, Ti and V on recrystallization kinetics of austenite in HSLA steels

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Warianty tytułu
PL
Oddziaływanie Nb, Ti i V na kinetykę rekrystalizacji austenitu w stalach typu HSLA
Języki publikacji
EN
Abstrakty
EN
The work presents research results of impact of Nb, Ti and V microadditions on recrystallization kinetics and microstructure of newly elaborated steels assigned for production of forged machine parts, using the method of thermomechanical treatment. The study was performed with the use of Gleeble 3800 simulator. In order to determine recrystallization kinetics of plastically deformed austenite, discontinuous compression tests of specimens were done with a given strain at the rate of 10 s–1, in a temperature range from 900 to 1100°C, with isothermal holding of samples between successive stages of deformation for 2 to 100 s. Recrystallization kinetics of plastically deformed austenite was described using the Johnson-Mehl-Avrami equation. Performed two-stages compression tests revealed that microadditions introduced into steel considerably influence the kinetics of static recrystallization. Determined time of total recrystallization of austenite, tR, in a temperature range from 1100°C to 900°C changes from 100 to 600 s and from 300 to 800 s — for the Ti–V steel and Ti–Nb–V steel, respectively. Executed hot compression tests will contribute to establishing conditions of forging with the method of thermomechanical treatment.
PL
W pracy przedstawiono wyniki badań oddziaływania mikrododatków Nb, Ti i V na kinetykę rekrystalizacji i strukturę nowo opracowanych stali typu HSLA przeznaczonych do wytwarzania kutych elementów maszyn metodą obróbki cieplno-plastycznej.
Rocznik
Strony
289--294
Opis fizyczny
Bibliogr. 23 poz., fig., tab.
Twórcy
autor
  • Silesian University of Technology, Institute of Engineering Materials and Biomaterials, Gliwice, Poland, marek.opiela@polsl.pl
Bibliografia
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  • [14] Medina S. F., Gòmez M., Gòmez P. P.: Effect of V and Nb on static recrystallization of austenite and precipitate size in microalloyed steels. Journal of Materials Science & Technology 45 (2010) 5553÷5557.
  • [15] Fernandez A. I., Uranga P., Lopez B., Rodriguez-Ibabe J. M.: Dynamic recrystallization behavior covering a wide austenite grain size range in Nb and Nb–Ti microalloyed steels. Material Science and Engineering A361 (2003) 367÷376.
  • [16] Dutta B., Palmiere E. J.: Effect of prestrain and deformation temperature on the recrystallization behavior of steels microalloyed with niobium. Metallurgical and Materials Transactions A 34 (2003) 1237÷1247.
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  • [18] Cho S., Kang K., Jonas J. J.: The dynamic, static and metadynamic recrystallization of a Nb-microalloyed steel. ISIJ International 41 (2001) 63÷69.
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Uwagi
Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-ba354a64-aaf1-4dda-acb7-77d94b9ba561
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