Effect of thermo-chemical treatment on tribological features on crankshaft journals of combustion engines

International Automotive Conference 2018

Kinal, G.^1 ; Musial, J.^2 ; Szczutkowski, M.^2 ; Kalaczyski, T.^2 ; Troszyski, A.^2

Poznan University of Technology, Institute of Machines and Motor Vehicles, ul. Piotrowo 3, Pozna

60-965, Poland^1

University of Science and Technology, Faculty of Mechanical Engineering, Al. Prof. S. Kaliskiego 7, Bydgoszcz

85-796, Poland^2

关键词: Combustion engines;    Constant values;    Crankshaft journals;    Ductile cast irons;    Microhardness measurement;    Nitrided specimens;    Surface roughness parameters;    Thermochemical treatments;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/421/3/032014/pdf
DOI  :  10.1088/1757-899X/421/3/032014

来源: IOP

【 摘 要 】

The article presents research on the wear between the bearing and journal surfaces. The investigation was done for two types of layers obtained by: laser drilling of EN-GJS-600 ductile cast iron and gas nitriding of 38 HMJ steel. Wear rates were defined on the base of comparison of surface layer profiles before and after the wear test. Comparing test results it was found that the biggest differences of the surface roughness parameter were obtained for gas nitrided specimens ( + γ'+ α) while the smallest differences for the laser drilled ones. Moreover the surface layer of specimens was evaluated with the usage of microhardness measurements. The surface of the drilled specimens was characterized with the constant value for the melt layer. At the end of the paper findings of the research were summarized and the conclusions were drawn.