The Effects of Screen Sizes on the Surface Properties of Tepered Steel Treated by Active Screen Plasma Nitriding

7th International Conference on Advanced Materials and Structures

Kovács, D.^1 ; Kemény, A.^1 ; Bonyár, A.^2 ; Dobránszky, J.^3

Budapest University of Technology and Economics, Faculty of Mechanical Engineering, Department of Material Science and Engineering, Muegyetem rakpart 3, Budapest

1111, Hungary^1

Budapest University of Technology and Economics, Department of Electronics Technology, Egry József street 18, Budapest

1111, Hungary^2

MTA-BME Research Group for Composite Science and Technology, Muegyetem rakpart 3, Budapest

1111, Hungary^3

关键词: Active screen plasma nitriding;    Alloyed steels;    Direct current plasma nitriding;    Edge effect;    Layer thickness;    Nitrided layer;    Screen sizes;    Thermochemical surface treatment;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/416/1/012040/pdf
DOI  :  10.1088/1757-899X/416/1/012040

来源: IOP

【 摘 要 】

Active screen plasma nitriding (ASPN) is a novel thermochemical surface treatment which has many specialities compared to the conventional direct current plasma nitriding (DCPN). The edge effect is eliminated, the hardness and layer thickness on the surface are homogeneously distributed. In this study, 42CrMo4 alloyed steel was treated with different screen sizes (screen diameter, hole size) active screen plasma nitriding. The parameters of treatment are similar in all cases (4 hours at 490°C and 2,2 torr). The nitrided samples were characterized by atomic force microscope (AFM) to analyse the roughness of the surface. The cross-section hardness of the samples and the thickness of the nitrided layers were also measured.