Effect of Double Stage Nitriding on 34CrAlNi7-10 Nitriding Steel

• Authors: İ. Altinsoy , G. Çelebı Efe , T. Yener , K. Önder , C. B∈dal
• Languages of publication: EN

Abstracts

EN

In this study, effect of double stage gas nitriding of 34CrAlNi7-10 steel was analyzed. Nitriding processes were carried out in two stages. in the first stage, samples were nitridied at 500°C for 10 h and then in second stage nitriding process was continued at 530 and 550°C for 20 h. During both stages, the nitrogen activity on surface was controlled by the nitriding potential, which is a thermodynamical control parameter for controlled gas nitriding process. The nitriding potential was kept constant, at value of 10, during the first stage and was varied in the range of 3.2-0.2, for both nitriding temperatures, in the second stage. The presence of nitrides, formed on the surface of test materials was determined by XRD analysis technique. The morphology of nitrided layer was studied by optical microscopy. The microhardness of the surfaces of nitrided samples in HV1 was between 955 and 1029. The measurements have shown that the thickness of the compound layer (white layer) has varied between 6.85-23.90 μm and that the growth of the white layer and microhardness gradient were strongly affected by the nitriding potential and the temperature. Diffusion depths as Nht(HV) for Vickers Hardness were determined and compared.

Keywords

EN

81.05.BX; 81.65.LP; 81.70.BT

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 132
• Issue: 3
• Pages: 663-666

Dates

published

2017-09

Contributors

author

İ. Altinsoy

• Sakarya University, Department of Metallurgical and Material Engineering, Sakarya, Turkey

author

G. Çelebı Efe

• Sakarya University, Department of Metallurgical and Material Engineering, Sakarya, Turkey

author

T. Yener

• Sakarya University, Department of Metallurgical and Material Engineering, Sakarya, Turkey

author

K. Önder

• Mikrosan Makina ve Kalıp San. A.S. Heat Treatment Department, Izmit, Kocael i

author

C. B∈dal

• Sakarya University, Department of Metallurgical and Material Engineering, Sakarya, Turkey

References

• [1] N. Ucar, N. Turku, A.F. Ozdemir, A. Calik, Acta Phys. Pol. A 130, 492 (2016), doi: 10.12693/APhysPolA.130.492
• [2] B. Wang, W. Fu, F. Dong, G. Jin, W. Feng, Z. Wang, S. Sun, Mater. Design 85, 91 (2015), doi: 10.1016/j.matdes.2015.07.013
• [3] B. Wang, S. Sun, M. Guo, G. Jin, Z. Zhou, W. Fu, Surf. Coat. Technol. 279, 60 (2015), doi: 10.1016/j.surfcoat.2015.08.035
• [4] N. Syla, F. Aliaja, B. Dalipi, Acta Phys. Pol. A 130, 83 (2016), doi: 10.12693/APhysPolA.130.83
• [5] K. Onder, M.Sc. Thesis, Sakarya Universitesi, 2013
• [6] R. Schneider, H. Hiebler, J. Mater. Sc. 33, 1737 (1998), doi: 10.1023/A:1004320330405
• [7] W. Liu, M.Sc. Thesis, Worcester Polytechnic Institute, 2008
• [8] C. Ginter, L. Torchane, J. Dulcy, M. Gantois, A Malchere, C. Esnouf, T. Turpin, La Metallurgia Italiana 7-8, 29 (2006) http://www.aimnet.it/allpdf/pdf_pubbli/7_06/Ginter.pdf
• [9] Y. Lakhtin, Metal Sci. Heat Treat. 38, 6 (1996), doi: 10.1007/BF01153864
• [10] O. Ozturk, O. Onmus, D.L. Williamson, Surf. Coat. Technol. 196, 341 (2005), doi: 10.1016/j.surfcoat.2004.08.154
• [11] M. Korwin, W. Liliental, L. Maldzinski, A. Czelusniak, G. Tymowski, Nitreg Controlled Gas Nitriding. An Environment-Friendly Process for Surface Hardening of Steel, Nitrex Metal, Canada 1999
• [12] Y. Lakhtin, N. Silina, V. Fedchun, Metal Sci. Heat Treat. 23, 162 (1981), doi: 10.1007/BF00769606

Identifiers

DOI

10.12693/APhysPolA.132.663