Carbide spheroidisation in 100CrMnSi6-4 bearing steel by controlled rolling

• Autorzy: Dlouhy J. , Hauserova D. , Novy Z.
• Języki publikacji: EN

Abstrakty

EN

Purpose: This article describes influence of thermomechanical treatment parameters on microstructure and mechanical properties of 100CrMnSi6-4 bearing steel. Design/methodology/approach: Steel properties after accelerated carbide spheroidisation enables machining and cold forming as well as after conventional soft annealing. Apparently, structure after accelerated carbide spheroidisation is significantly finer than after long duration soft annealing – in terms of carbide particles and grain size. That enhances steel hardness and homogeneity of the structure in final state after hardening. Findings: Presented experiment deals with accelerated carbide spheroidisation of 100CrMnSi6-4 bearing steel during final stage of hot rolling. Main purpose is to achieve microstructure consisting of globular carbides and ferritic matrix directly after hot forming. Research limitations/implications: The combination of a suitable forming temperature, an appropriate amount of deformation and a possible reheating lead to globular carbide formation during austenite decomposition instead of cementite lamellae. Originality/value: Experiment results are promising for quenching and tempering in comparison with structure after conventional soft annealing with coarser. Finer ASR structure retains finer austenite grain at quenching temperature and higher dispersion strengthening.

Słowa kluczowe

EN

spheroidized carbide; thermomechanical treatment; bearing steel; controlled rolling

PL

węglik sferoidalny; obróbka termomechaniczna; stal łożyskowa; walcowanie regulowane

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2014
• Tom: Vol. 68, nr 2
• Strony: 87--92
• Opis fizyczny: Bibliogr. 5 poz.

Twórcy

autor

Dlouhy J.

• COMTES FHT a.s., Prumyslova 995, 334 41 Dobrany, Czech Republic

autor

Hauserova D.

• COMTES FHT a.s., Prumyslova 995, 334 41 Dobrany, Czech Republic

autor

Novy Z.

• COMTES FHT a.s., Prumyslova 995, 334 41 Dobrany, Czech Republic

Bibliografia

• [1] H.K.D.H. Bhadeshia, Steelsfor bearings, Progress in Materials Science 57 (2012) 268-435.
• [2] Y.T. Wang, Y. Adachi, K. Nakajima, Y. Sugimoto, Quantitative three-dimensional characterization of pearlite spheroidisation, Acta Materialia 58 (2010) 4849-4858.
• [3] D.V. Shtansky, K. Nakai, Y. Ohomori, Pearlite to austenite transformation in an Fe-2.6Cr-1c alloy, Acta Materialia 47 (1999) 2619-2632.
• [4] K.Z. Shepelyakovskii, A.G.Spektor, A.N. Kuznetsov, V.T. Gubenko, V.S. Zdanovskii, Rapid spheroidizing annealing of roller bearings with induction heating, Metallovedenie i Termicheskaya Obrabotka Metallov 1 (1976) 62-64.
• [5] D. Hauserova, J. Dlouhy, Z. Novy, Microstructure development of bearing steel during accelerated carbide spheroidisation, Materials Science Forum 782 (2014) 123-128