The Influence of Plasma Nitriding Time on Mechanical Properties of Plasma Nitriding steel
الموضوعات : Analytical and Numerical Methods in Mechanical DesignSeyed Mohammad Shafiei 1 , Hamed Raeisifard 2 , Sara Sadat Tejareh 3
1 - Department of Mechanical Engineering, West Tehran Branch, Islamic Azad University, Tehran, Iran
2 - Department of Mechanical Engineering, Roudehen Branch, Islamic Azad University, Tehran, Iran
3 - Department of Industrial Design, West Tehran Branch, Islamic Azad University, Tehran, Iran
الکلمات المفتاحية: mechanical testing, surface engineering, tool steels, tribology,
ملخص المقالة :
The aim of this study is to investigate the effect of plasma nitriding time on mechanical and tribological behavior of nitriding coatings produced by plasma-assisted chemical vapor deposition (PACVD). The heat treatment of quench and temper was carried out on hot work AISI H12 (DIN 1.2606) steel samples. A group of samples was plasma nitrided at 470 °C for 2 h in an atmosphere containing 25 vol. % nitrogen and 75 vol. % hydrogen and another group of samples was nitrided on for 4 h, 8 kHz frequency, and 33% duty cycle. The microstructural, mechanical, and tribological properties of the coatings were investigated using optical microscopy, microhardness tester, and pin-on-disc wear test. The load of wear test was 10 N and the samples were worn against different pins, ball-bearing steel (DIN1.3505). The results indicate that the difference of hardness between the samples with different time was 450 HV and the former samples showed a significant amount of wear resistance in comparison to the latter ones.
[1] Mebarki, N., Delanges, D., Lamesle, P., Delmas, F. and Levaillant, S., Relationship between microstructure and mechanical properties of a 5% Cr tempered martensitic tool steel, Mater. Sci. Eng. A. 387/389 (2004) 171-175.
[2]. Barrau, O., Boher, C., Gras, R. and Rezai-Aria, F., Analysis of the friction and wear behaviour of hot work tool steel for forging, Wear. 255 (2003), 1444-1454.
[3] M. Tercelj, A. Smolej, P. Fajfar, R. Turk, Tribol. Int. 40 (2007) 374–384.
[4] J.H. Kang, I.W. Park, J.S. Jae, S.S. Kang, J. Mater. Process. Technol. 96
(1999) 53–58.
[5] J. Sj¨ostrom, J. Bergstr¨om, J. Mater. Process. Technol. 153–154 (2004)
1089–1096.
[6] S. Li, R.R. Manory, J. Mater. Sci. 34 (2009) 1045.
[7] P. Schaaf, Prog. Mater. Sci. 47 (2020) 1.
