Original scientific paper

Interrupted quenching in high carbon steels for forgings

G. Napoli
S. Mengaroni ; ThyssenKrupp Acciai Speciali Terni, Terni, Italy
M. Rallini ; Università di Perugia, Dipartimento di Ingegneria Civile ed Ambientale, Perugia, Italy
L. Torre ; Università di Perugia, Dipartimento di Ingegneria Civile ed Ambientale, Perugia, Italy
A. Di Schino ; Università di Perugia, Dipartimento di Ingegneria, Perugia, Italy

Abstract

The present study is focused on analyzing the effect of the interrupted quenching followed by a partitioning process in a high carbon steel 0,50 % C, 1,50 % Mn, 0,40 % Si, 2,00 % Cr without significant contribution of Al. Thermal treatments were performed at laboratory scale in a quenching dilatometer Linseis R.I.T.A RL78. The fractions of retained austenite were evaluated by scanning electron microscope. The temperature for the interrupted quenching phase was evaluated based on the Koistenen and Marburger equation (adapted to the 0,50 % C steel) and the result highlights a correlation between the chosen different temperature of quenching and the fraction of retained austenite formed during the quenching step of the process.

Keywords

steel; heat treatment; quenching; temperature; microstructure

Hrčak ID:

180977

URI

https://hrcak.srce.hr/180977

Publication date:

1.7.2017.

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