Pearlitic Lamellae Spheroidisation During Austenitization and Subsequent Temperature Hold

• Autorzy: Hauserova D. , Dlouhy J. , Kover M.

Identyfikatory

DOI

10.1515/amm-2017-0028

• Języki publikacji: EN

Abstrakty

EN

Typical processing routes for bearing steels include a soft annealing stage. The purpose of this procedure is to obtain a microstructure containing globular carbides in ferritic matrix. A newly developed process called ASR (Accelerated Spheroidisation and Refinement) cuts the carbide spheroidisation times several fold, producing considerably finer globular carbides than conventional soft annealing. Finer microstructure also leads to more homogeneous and finer structure after final hardening process. The present paper explores process of the accelerated spheroidisation (ASR) in steel 100CrMnSi6-4 with initial pearlitic structure. Cementite lamellae morphology was observed in different stages of austenitization. The heat treatment was performed using induction heating in quenching dilatometer. There was analysed influence of austenitization temperature and austenitization time on spheroidisation. Hardness and carbide morphology was observed. Deep etching was used to reveal evolution of cementitic lamellae fragmentation. It is favourable process especially in induction treatment of small parts.

Słowa kluczowe

EN

Accelerated Spheroidisation and Refinement; annealing; bearing steel; induction heating

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2017
• Tom: Vol. 62, iss. 1
• Strony: 201--204
• Opis fizyczny: Bibliogr. 6 poz., rys., tab.

Twórcy

autor

Hauserova D.

• COMTES FHT A.S., 995 Prumyslova Str., 33-4 41 Dobrany, Czech Republic

autor

Dlouhy J.

• COMTES FHT A.S., 995 Prumyslova Str., 33-4 41 Dobrany, Czech Republic

autor

Kover M.

• COMTES FHT A.S., 995 Prumyslova Str., 33-4 41 Dobrany, Czech Republic

Bibliografia

• [1] N.V. Luzginova, L. Zhao, J.A. Sietsm, The Cementite Spheroidization Process in High-Carbon Steels with Different Chromium Contents, Metallurgical and Materials Transactions A 39, 513-521 (2008).
• [2] W.J. Nam, C.M. Bae, Coarsening Behavior of Cementite Particles at a Subcritical Temperature in a Medium Carbon Steel,Scripta Materialia 57, 313-318 (1999).
• [3] K.G. Ata, S.A. Meisam, Spheroidising Kinetics and Optimization of Heat Treatment Parameters in CK60Steel Using Taguchi Robust Design,Journal of Iron and Steel Reasearch 17, 45-52 (2010).
• [4] H.K.D.H. Bhadeshia, Steels for bearings,Progress in Materials Science 57, 268-435 (2012).
• [5] D. Hauserova, J. Dlouhy, Z. Novy, Effect of Heating Rate on Accelerated Carbide Spheroidisation (ASR) in 100CrMnSi6-4 Bearing Steel,Archives of Metallurgy and Materials 59, 1199 (2014).
• [6] D. Hauserova, J. Dlouhy, Z. Novy, Microstructure Development of Bearing Steel during Accelerated Carbide Spheroidisation, Materials Science Forum 782, 123-128 (2014).

Uwagi

EN

This paper was created by project Development of West-Bohemian Centre of Materials and Metallurgy No. : LO1412, financed by the MEYS of the Czech Republic.

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).