Original scientific paper

Research into boride layers growth kinetics on C45 carbon steel

A. Milinović ; Mechanical Engineering Faculty in Slavonski Brod, Josip Juraj Strossmayer University of Osijek, Slavonski Brod, Croatia
V. Marušić ; Mechanical Engineering Faculty in Slavonski Brod, Josip Juraj Strossmayer University of Osijek, Slavonski Brod, Croatia
I. Samardžić ; Mechanical Engineering Faculty in Slavonski Brod, Josip Juraj Strossmayer University of Osijek, Slavonski Brod, Croatia

Abstract

This study focuses on evaluation of borides formed on C45 steel. Pack boronizing is carried out at a temperature range of 870 – 970 °C in durations of 4 to 8 h. Values of frequency factor (4,51•10-4 m2•s-1) and activation energy (199,63 kJ•mol-1) are determined by means of Arrhenius equation. Analysis is also performed to assess the change in volume share of boride phase and the surface microhardness in the layer cross section. Results indicated that cross sectional changes of volume share of boride phase depends on boronizing temperature and duration. In addition, empirical expression showing functional relationship between them has been obtained.

Keywords

boronizing; carbon steel; boride phase; structure; hardness

Hrčak ID:

157394

URI

https://hrcak.srce.hr/157394

Publication date:

1.10.2016.

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