Refinement of steel microstructure by free-forging

• Autorzy: Jandová D. , Divišová R. , Skálová L. , Drnek J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Refinement of austenitic steel and low alloyed C-Mn-Si-Nb steel microstructure by free-forging. Design/methodology/approach: In this study severe hot deformation was applied on low alloyed 0.2C-1.5Mn-2Si-0.05Nb steel and austenitic 0.07C-18Cr-2Mn.-10Ni steel. Steels were processed in a full-hydraulic press. Different temperatures of preheating, dwells and strain levels were applied. Microstructure was characterised using optical metallography, scanning and transmission electron microscopy. Findings: After optimization of processing fine grained structures with convenient phase composition were obtained. Multiple free-forging followed by recrystallization annealing was successfully used for refinement of austenitic Cr-Ni steel and improvement of mechanical properties. While free-forging of low alloyed C-Mn-Si-Nb steel still has not satisfied expected increase of strength and ductility. Research limitations/implications: Free-forging usually results in formation of very heterogeneous structures. In submitted study relatively fine grained and uniform structures were obtained. Grain size below a few micrometers can not be probably achieved using above mentioned technology. Originality/value: Obtained results can be used for development of forging technology in service conditions.

Słowa kluczowe

EN

fine-grained structure; austenitic steel; microalloyed steel; free forging; microscopy

PL

struktura drobnoziarnista; stal austenityczna; stal mikrostopowa; kucie; mikroskopia

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 16, nr 1-2
• Strony: 17--24
• Opis fizyczny: Bibliogr. 14 poz., rys., tab.

Twórcy

autor

Jandová D.

• University of West Bohemia in Pilsen, Univerzirní 8, CZ-306 14, Czech Republic

autor

Divišová R.

• University of West Bohemia in Pilsen, Univerzirní 8, CZ-306 14, Czech Republic

autor

Skálová L.

• University of West Bohemia in Pilsen, Univerzirní 8, CZ-306 14, Czech Republic

autor

Drnek J.

• COMTES FHT, s. r. o., Lobezská E981, CZ-326 00 Pilsen, Czech Republic

Bibliografia

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