5-8 September 2022
Wyndham Grand Salzburg Conference Center
Europe/Vienna timezone

Influence of nitrogen enrichment on microstructure and mechanical properties of a carbonidrided low steel alloy

6 Sep 2022, 15:20
25m
Room 2

Room 2

Oral Presentation Thermochemical treatment (carburizing, carbonitriding, nitrocarburizing, nitriding) SURFACE ENGINEERING

Speaker

Mr David Maréchal (IRT M2P)

Description

In some applications, carbonitriding treatment is used to replace the carburizing treatment thanks to its ability to improve mechanical properties.

The aim of this study is to better understand the role of nitrogen on mechanical properties and microstructure. For this we studied the response of the 27MnCr5 steel to different carbonitriding treatments which target specific carbon and nitrogen composition profiles. These specific compositions profiles were chosen to generate equivalent hardness profiles to the carburized reference.

The results confirm the positive effect of nitrogen on the mechanical properties. The performance of carbonitrided steels with high nitrogen content (> 0.3%N) are improved. Additionally, tempering at an intermediate temperature (160°C) further improves the mechanical resistance thanks to the precipitation of nanometric Fe16N2 nitrides. Moreover, a new carbonitriding treatment was developed to obtain greater nitrogen enrichment leading to superficial nitrogen mass fraction of 0.5%.

Speaker Country France
Register for the Tom Bell Young Author Award (TBYAA)? Yes

Primary authors

Co-authors

Mr David Maréchal (IRT M2P) Corentin DIDES (IRT M2P) Jacky DULCY (IRT M2P) Julien VALETTE (IRT M2P) Mathieu BILLET (ASCOMETAL) André GALTIER (ASCOMETAL) Marc COURTEAUX (STELLANTIS)

Presentation Materials

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