Investigation of Microstructure and Corrosion Propagation Behaviour of Nitrided Martensitic Stainless Steel Plates

Kamal Ariff Zainal Abidin,Azman Zainuddin,Elya Atikah Ismail,Patthi Hussain

doi:10.1051/matecconf/20141304029

Kamal Ariff Zainal Abidin, Azman Zainuddin + Show 2 more

Open Access

https://doi.org/10.1051/matecconf/20141304029

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Abstract

Martensitic stainless steels are commonly used for fabricating components. For many applications, an increase in surface hardness and wear resistance can be beneficial to improve performance and extend service life. However, the improvement in hardness of martensitic steels is usually accompanied by a reduction in corrosion strength. The objective of this study is to investigate the effects of nitriding on AISI 420 martensitic stainless steel, in terms of microstructure and corrosion propagation behavior. The results indicate that the microstructure and phase composition as well as corrosion resistance were influenced by nitriding temperatures.

Highlights

Nitriding is an effective technique applied for many years to improve the surface hardness and wear resistance of low carbon and tool steels [3]
Comparing the micrographs of samples nitrided at 500°C and 1100°C it can be seen from Figure 2, there seems to be no sensitization effect on the grain boundaries but in figure 3 and 4, the sensitization effect is very obvious, especially at the edge of the samples
The micrographs obtained for the samples showed how the samples were nitrided and the results are further enhanced with the use of Scanning Electron Microscope (SEM) and Energy-Dispersive X-ray (EDX)

Summary

Introduction

Nitriding is an effective technique applied for many years to improve the surface hardness and wear resistance of low carbon and tool steels [3]. R. Karadas et al [5] investigated the microstructures, phase compositions, hardness, wear and corrosion behaviour of the original and martensitic stainless steels that had undergone low temperature nitriding in a fluidized bed reactor. D.H. Mesa et al [6] tested high-nitrogen martensitic stainless steels under corrosion-erosion conditions in slurry compose and observe optimum temperature of the martensitic steel where the corrosion-erosion resistance is highest. The objectives of this study are to observe and investigate the effects of nitriding on martensitic stainless steels, in terms of their microstructures and corrosion propagation behavior

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Conclusion