Peculiarities of Formation the Microstructure of Ferritic Steels during Cooling  Full text 

A.I. Yatsenko¹, I.P. Fedorova¹, N.I. Repina¹, V.E. Khrychikov²2, V.G. Zarenbin³, A.V. Tatarchuk³

¹Institute of Ferrous Metallurgy, National Academy of Sciences of Ukraine
²NMetAU
³PSACEA

UDC 669.168

Metall. Min. Ind.,  2012, Vol. 4, No. 3, pp. 127-135

Abstract

The peculiarities of formation of austenite during cooling of steels with ferritic structure are studied. It is shown that the initial austenitizing goes on the diffusion-shear mechanism of the ordered crystalline phase transition. High-temperature poly-morphic transformations of δ-ferrite → γ induce the formation of a special morphological form of austenite. Its composition and structure are inherited by subsequent solid-phase transformations and the formation of finite structures with hereditary constructional and structural steel base.

Keywords: STEEL, LOW CARBON, FERRITE, POLYMORPHIC TRANSFORMATION, AUSTENITIZING, THE MORPHOLOGICAL FORM