Original scientific paper

Thermo-mechanical process parameters effect on a 9 % Cr-2 % W steel

A. Di Schino ; Università di Perugia, Dipartimento di Ingegneria, Perugia, Italy
R. Rufini ; Università di Perugia, Dipartimento di Ingegneria, Perugia, Italy

Abstract

In this paper the effect of thermo-mechanical parameters on the mechanical behavior of a 9 % Cr-2 % W steel is investigated by hot rolling and heat treatment on pilot scale. Results show a strong effect of reheating temperature before rolling on the material hardness, due to an increase of hardenability following the austenite grain growth. A poor effect of the hot reduction and of the following tempering temperature is detected in the total investigated deformation range. A loss of impact energy is found coupled with the hardness increase. The tensile properties values are strongly depending upon the tempering temperature and an increase of tensile yield stress (R_p0,2) and ultimate stress (R_m) have been recorded in tensile test carried on at T = 550°C and T = 650°C.

Keywords

steel; thermo-mechanical process; microstructure; mechanical properties; rolling temperature

Hrčak ID:

201737

URI

https://hrcak.srce.hr/201737

Publication date:

1.10.2018.

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