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Abstrakty
The paper presents the investigation of conical blades made of unalloyed steel C20 gas-nitrided by the Nitreg method. On the surface of steel blades (with tip angles in the range of 20–170°) an approx. 15 mm-thick nitride layer of was fabricated, which had a bizonal structure of: ɛ (Fe2–3N and Fe3(N,C)1–x) and ɛ + γ′(Fe4N) with a hardness of 1310 HV and 910 HV, respectively. Hardness tests carried out on blade cross-section showed that a 0.7–1 mm thick diffusion layer occurred under the nitride layer. By applying the criterion of effective nitrided layer thickness, gc+50, it was demonstrated that blades with a tip angle of 20° and 30° had been through-nitrided (i.e. nitrided through and through). A static compression test showed that, as a result of nitriding, the compressive strength of the blades had increased by a factor of two.
Czasopismo
Rocznik
Tom
Strony
147--156
Opis fizyczny
Bibliogr. 13 poz., rys., wykr.
Twórcy
autor
- Czestochowa University of Technology, Faculty of Production Engineering and Materials Technology, 19 Armii Krajowej Street, 42-200 Czestochowa, Poland
autor
- Institute of Precision Mechanics, 3 Duchnicka Street, 01-796 Warszawa, Poland
autor
- Czestochowa University of Technology, Faculty of Production Engineering and Materials Technology, 19 Armii Krajowej Street, 42-200 Czestochowa, Poland
Bibliografia
- [1] L. Małdziński, Thermodynamic, kinetic and technological aspects of the producing nitrided layers on iron and steel In processes of gas nitriding, Ed. Technical University of Poznan, 2002 (in Polish).
- [2] P. Wach, J. Michalski, J. Tacikowski, S. Kowalski, M. Betiuk, Gas nitriding and its variants in industrial application, Inż. Mater.-Mater. Eng. 6 (166) (2008) 808–811 (in Polish).
- [3] L. Maldzinski, W. Liliental, G. Tymowski, J. Tacikowski, New possibilities for controlling gas nitriding process by simulation of growth kinetics of nitride layer, Surf. Eng. 15 (5) (1999) 377–384.
- [4] E. Lehrer, Über das Eisen-Wasserstoff-Ammoniak Gleichgewicht, Z. Elektrochem. 36 (6) (1930) 383–392.
- [5] J. Ratajski, R. Olik, Development of nitrided layer during nitriding of steel, Adv. Mater. Res. 83–86 (2010) 1025–1034.
- [6] K. Dybowski, Ł. Kaczmarek, E. Pietrasik, J. Smolik, Ł. Kołodziejczyk, D. Baroty, M. Gzik, M. Stegliński, Influence of chemical heat treatment on the mechanical properties of paper knife-edge die, J. Achiev. Mater. Manuf. Eng. 37 (2) (2009) 422–427.
- [7] M. Kulka, D. Panfil, J. Michalski, Modelling of the effects of laser modification of gas-nitrided layer, Arch. Mater. Sci. Eng. 2 (88) (2017) 59–67.
- [8] J. Smolik, J. Walkowicz, J. Tacikowski, Influence of the structure of the composite: nitrided layer/PVD coating on the durability of tools for hot-working, Surf. Coat. Technol. 125 (2000) 134–140.
- [9] M. Betiuk, J. Michalski, J. Tacikowski, Z. Łataś, Measuring of the thickness of iron nitrides layers, Inż. Powierzchni 2 (2014) 60–66.
- [10] Norma AMS 2759/10A, Automated gaseous nitriding controlled by nitriding potential.
- [11] J. Michalski, J. Iwanow, J. Tacikowski, I. Sułkowski, P. Wach, T. N. Tarfa, J. Tymowski, Anti-corrosion nitriding, with postoxidation and inhibitor impregnation, and its industrial applications, Heat Treat. Met. 31 (2) (2004) 31–35.
- [12] J. Michalski, P. Wach, K. Burdyński, M. Betiuk, Control and regulation of the kinetics of layer thickness increase in controlled gas nitriding processes, Inż. Powierzchni 2 (2015) 34–40 (in Polish).
- [13] J. Michalski, J. Tacikowski, P. Wach, J. Ratajski, Controlled gas nitriding of 40HM and 38HMJ steel grades with the formation of nitrided cases with and without the surface compound layer, composed of iron nitride, J. Mech. Constr. Maintenance, Problemy Eksploatacji 2 (2006) 43–51.
Uwagi
PL
Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019)
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-1bcd7843-f3bf-404e-9b3a-4dd15e41a41b