Analysis of the kinetics of precipitation of MX-type interstitial phases in microalloyed steels

• Autorzy: Opiela M.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The paper presents analysis of the kinetics of precipitation of MX-type (M - metal, X - metalloid) interstitial phases in austenite of constructional steels microalloyed with Nb, Ti, V and B, assigned for production of forged machine elements with the use of thermo-mechanical treatment. Design/methodology/approach: The analysis was conducted basing on the dependence of solubility of MX-type phases in austenite as a function of temperature. The research of influence of austenitizing temperature in a temperature range from 900 to 1200°C on grain size of primary austenite has been used to verify the analysis. Findings: The kinetics of TiN, TiC and NbC precipitation as well as the temperature sequence of precipitation of these phases have been determined. The investigation of influence of austenitizing temperature on the grain size of primary austenite confirmed correctness of the analysis. Research limitations/implications: The analysis was done basing on the thermodynamic model proposed by Adrian, assuming that only individual, single MX phases are soluble in austenite. Practical implications: The studies provide the basis for proper design of manufacturing process of thermomechanical treatment of high strength forged machine parts obtained from microalloyed steels. Originality/value: The kinetics of precipitation of interstitial phases in newly elaborated microalloyed steels has been compiled.

Słowa kluczowe

EN

microalloyed steels; MX-type phases; primary austenite; thermomechanical treatment; forged elements

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2011
• Tom: Vol. 47, nr 1
• Strony: 7--18
• Opis fizyczny: Bibliogr. 23 poz., rys., tab.

Twórcy

autor

Opiela M.

• Division of Constructional and Special Materials, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

Bibliografia

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