Mechanical and microstructural aspects of C20-steel blades subjected to gas nitriding

• Autorzy: Kucharska Barbara , Michalski Jerzy , Wójcik Grzegorz

Identyfikatory

DOI

10.1016/j.acme.2018.09.006

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

gas nitriding; through-nitriding; conical blades; C20 steel

PL

azotowanie gazowe; ostrze stożkowe; stal C20

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2019
• Tom: Vol. 19, no. 1
• Strony: 147--156
• Opis fizyczny: Bibliogr. 13 poz., rys., wykr.

Twórcy

autor

Kucharska Barbara

• Czestochowa University of Technology, Faculty of Production Engineering and Materials Technology, 19 Armii Krajowej Street, 42-200 Czestochowa, Poland

autor

Michalski Jerzy

• Institute of Precision Mechanics, 3 Duchnicka Street, 01-796 Warszawa, Poland

autor

Wójcik Grzegorz

• 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.
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• [10] Norma AMS 2759/10A, Automated gaseous nitriding controlled by nitriding potential.
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• [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)