The Mössbauer spectroscopy studies of hypereutectoid cementite precipitation

• Autorzy: Krawczyk J. , Bała P. , Hanc A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: of this paper: This work complements the knowledge concerning the hypereutectoid cementite precipitation. Investigations were performed on 120MnCrMoV8-6-4-2 steel, which was designed in 1998, in Phase Transformations Research Group of Department of Physical and Powder Metallurgy at the Faculty of Metals Engineering and Industrial Computer Science at AGH University of Science and Technology in Kraków. Design/methodology/approach: Samples of investigated steel were austenitized at the temperature of 900°C and hardened in oil. Next, four from five samples were tempered. Tempering consisted of heating the samples up to chosen temperatures with a heating rate of 0.05°C/s and, after reaching desired temperature, fast cooling. CEMS technique was applied for Mössbauer studies. Findings: Secondary cementite remaining in the microstructure of 120MnCrMoV8-6-4-2 steel hardened from 900°C is alloyed to a degree which allows paramagnetism. Research limitations/implications: The influence of hypereutectoid cementite on the cementite precipitations during continuous heating from as-quenched state of high carbon Cr-Mn-Mo steel was determined. Practical implications: The knowledge of the influence of hypereutectoid cementite on the cementite precipitations during continuous heating enables proper design of the heat treatment of 120MnCrMoV8-6-4-2 steel in respect to its application for hot working tools. Originality/value: Measurements of the isomeric shift for secondary cementite allowed to determine changes in level of stresses occurring in hardened steel.

Słowa kluczowe

EN

Mössbauer spectroscopy; CEMS; steel; hypereutectoid cementite

PL

spektroskopia Mössbauera; CEMS; stal; cementyt drugorzędowy

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2008
• Tom: Vol. 32, nr 1
• Strony: 45--48
• Opis fizyczny: Bibliogr. 15 poz.

Twórcy

autor

Krawczyk J.

autor

Bała P.

autor

Hanc A.

• Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, ul. Mickiewicza 30, 30-059 Kraków, Poland,

Bibliografia

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