The Effect of Stepped Austempering on Phase Composition and Mechanical Properties of Nanostructured X37CrMoV5-1 Steel

Autor:	Marciniak S., Skołek E., Świątnicki W.
Jazyk:	angličtina
Rok vydání:	2015
Předmět:	heat treatment austempering steels nanobainite dilatometric test Mining engineering. Metallurgy TN1-997 Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Archives of Metallurgy and Materials, Vol 60, Iss 1, Pp 517-521 (2015)
Druh dokumentu:	article
ISSN:	2300-1909 2015-0083
DOI:	10.1515/amm-2015-0083
Popis:	This paper presents the results of studies of X37CrMoV5-1 steel subjected to quenching processes with a one-step and a two-step isothermal annealing. The TEM observation revealed that steel after one-step treatment led is composed of carbide-free bainite with nanometric thickness of ferrite plates and of high volume fraction of retained austenite in form of thin layers or large blocks. In order to improve the strength parameters an attempt was made to reduce the austenite content by use of quenching with the two-step isothermal annealing. The temperature and time of each step were designed on the basis of dilatometric measurements. It was shown, that the two-step heat treatment led to increase of the bainitic ferrite content and resulted in improvement of steel's strength with no loss of steel ductility.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/64d1e5d45a9b488d85d6f5465ba68633 Zobrazit plný text záznamu View record in DOAJ Plný text ve formátu PDF